Entries |
Document | Title | Date |
20080200195 | Multi-Mode Control Station, Radio Communication System, Radio Station, and Radio Communication Control Method - The overall throughput of the radio communication traffic in a radio communication area in a radio communication environment where a plurality of types of radio communication systems are mixedly used in a neighboring radio communication area is improved. When a multi-mode control station ( | 08-21-2008 |
20080233987 | Communication apparatus - A communication apparatus including: a main device having a rest portion and communicable with an external device; and a wireless device which is permitted to be placed on the rest portion and is communicable with the main device through a wireless communication so as to be communicable with the external device via the main device, wherein the communication apparatus is configured to establish a wired connection between the wireless device and the main device when the wireless device is placed on the rest portion of the main device. | 09-25-2008 |
20080254818 | Method, Communication System and Communication Unit for Protecting Incumbent Wireless Services - The invention relates to a Method, a Communication System and an Communication Unit for protecting incumbent services whereas in the incumbent services first information is exchanged between first communication means by radio frequency transmission within a first bandwidth using a first protocol and second information is exchanged between second communication means by radio frequency transmission within a second bandwidth using a second protocol and the second bandwidth is overlapping and larger than the first bandwidth. The problem to be solved is to reduce or to eliminate an interference of secondary services to incumbent services. The problem is solved by ascertaining the presence of any first information exchange between said first communication means; transmitting a protecting information at least about the presence of a first information exchange to at least one of the second communication means; inhibiting said at least one of the second communication means to use the radio frequencies used for exchanging the first information for transmitting the second information and transmitting the second communication within a frequency range wherein the radio frequencies used for exchanging the first information for transmitting the second information are notched. | 10-16-2008 |
20090005092 | CONTENTION WINDOW ADAPTATION OF WIRELESS DEVICES FOR MITIGATION OF PERIODIC INTERFERENCE - When a wireless communications device determines that a microwave oven or other source of periodic interference is operating nearby, the device may rapidly increase the size of its contention window to reduce the number of retries that it attempts during the period of interference. Similarly, it may rapidly decrease the size of the contention window during the periods of non-interference. In some embodiments, the maximum size of the contention window derived during periods of interference may be sized to assure enough time for successful completion of at least one transmission during the next period of non-interference. | 01-01-2009 |
20090017850 | METHODS AND APPARATUS FOR SUCCESSIVE INTERFERENCE CANCELLATION BASED ON TRANSMIT POWER CONTROL BY INTERFERING DEVICE WITH SUCCESS PROBABILITY ADAPTATION IN PEER-TO-PEER WIRELESS NETWORKS - In an ad hoc peer-to-peer communication network between wireless devices, a low priory first transmitter device adjusts it transmit power based on a received transmission request response from a higher priority second receiver device. The first transmitter device broadcasts a first transmission request to a corresponding first receiver device and may receive a first transmission request response from a different second receiver device. The second transmission request response is sent by the second receiver device in response to a second transmission request from a second transmitter device. The first transmitter device calculates an interference cost to the second receiver device as a function of the received power of the first transmission request response. A transmission power is obtained as a function of the calculated interference cost and the transmission power of the first transmission request, the transmission power to be used for traffic transmissions corresponding to the first transmission request. | 01-15-2009 |
20090023464 | Methods and Apparatus for Resolving Pilot Pseudorandom Noise Code Conflicts in a Communication System - Automated PilotPN code conflict resolution using an access point with the assistance of one or more access terminals is disclosed. An exemplary method includes determining a set of access points, as well as determining a set of PilotPN codes used by the set of access points. Detection is then made concerning whether at least two access points of the set of access points have conflicting PilotPN codes. A first PilotPN code is allocated to one of the at least two access points having conflicting PilotPN codes. Additionally, one or more other PilotPN codes, which are distinct from the first PilotPN code, are allocating to remaining access points of the at least two access points having conflicting PilotPN codes. Corresponding apparatus and other exemplary methods are also disclosed. | 01-22-2009 |
20090036150 | INTERFERENCE BASED PHASE SHIFT PRECODING FOR OFDM - In a radio network a determination is made whether to implement cyclical delay diversity (CDD) for a radio frequency connection involving a radio base station ( | 02-05-2009 |
20090036151 | COMMUNICATION SYSTEM, COMMUNICATION APPARATUS, AND COMMUNICATION METHOD - There is provided a communication control technique in which it is possible to avoid interference with another wireless communication system. This invention is characterized by a control station which controls wireless communication of dependent stations. When a dependent station newly starts, the control station determines whether a beacon transmitted by the dependent station is received by another wireless communication network. When determining that the beacon is received by the other wireless communication network, the control station instructs the dependent station to lower the transmission power until the beacon is not received. | 02-05-2009 |
20090163237 | Communications Systems - A method of reducing interference in a first wireless communications system, the first wireless communications system being operable in use to take part in a spectrum assignment process involving at least a second wireless communications system, the method comprising defining an exclusion zone in proximity to the first wireless communications system, the exclusion zone indicating that any mobile communications apparatus located within the exclusion zone is not permitted to communicate with the second wireless communications system using a portion of spectrum which was pre-assigned to the first wireless communications system and which is currently re-assigned to the second wireless communications system as part of the spectrum assignment process; and varying the local size of a part only of the exclusion zone in dependence on a level of interference inflicted on the first wireless communications system. | 06-25-2009 |
20090170542 | SYSTEM AND METHOD FOR MINIMIZING INTER-COMMUNICATIONS SYSTEM MOBILE STATION-TO-MOBILE STATION INTERFERENCE - A system and method for minimizing inter-communications system mobile-to-mobile station interference includes a plurality of base stations (BS A and BS B) and a plurality of mobile stations (MS A and MS B) each communicating with a base station using a first mode of communication. A first mobile station (MS A) sends a message using a second mode of communication upon detecting interference with another mobile station (MS B) to determine the source of the interference. Once determined, the first mobile station (MS A) communicates with its base station (BS A) which, in turn, communicates with the second mobile station's base station (BS B) using a back haul network. The second mobile station's base station (BS B) may then instruct the second mobile station (MS B) to alter its transmission characteristics based upon instructions from the second base station (BS B) in order to reduce interference and improve overall communications quality. | 07-02-2009 |
20090191906 | Communication systems - A wireless communication system is comprised of multiple radio access networks—RANs—which at least partly share the same frequency spectrum. Each RAN is provided with a gateway—GW—(GW | 07-30-2009 |
20090191907 | METHOD AND APPARATUS FOR ADAPTIVELY CONTROLLING SIGNALS - A signal processing system according to various aspects of the present invention includes an excursion signal generator, a scaling system and a filter system. The excursion signal generator identifies a peak portion of a signal that exceeds a threshold and generates a corresponding excursion signal. The scaling system applies a real scale factor to contiguous sets of excursion samples in order to optimize peak-reduction performance. The filter system filters the excursion signal to remove unwanted frequency components from the excursion signal. The filtered excursion signal may then be subtracted from a delayed version of the original signal to reduce the peak. The signal processing system may also control power consumption by adjusting the threshold. The signal processing system may additionally adjust the scale of the excursion signal and/or individual channel signals, such as to meet constraints on channel noise and output spectrum, or to optimize peak reduction. The magnitude threshold, excursion signal and/or individual channel signals may also be adaptively adjusted based on, for example, a channel signal quality such as a noise level specification. | 07-30-2009 |
20090209276 | COMMUNICATION APPARATUS - Node-B transmits a power profile of each frequency of transmission data as a step function to a UE. Each UE measures the amount of interference of a received signal, evaluates SINR over the entire frequency band with the power of the received signal, and transmits the evaluation result to Node-B. Node-B evaluates the interference profile in Node-B from the information about the SINR transmitted from the UE and the power of the transmission signal, and determines the frequency profile of the power of the signal transmitted to the UE. | 08-20-2009 |
20090209277 | Satellite Redundancy for Critical Applications - A system includes a method for automatically reconfiguring a satellite network with a high accuracy in order to enable system reconfiguration very quickly and at a low cost. The system employs a single axis steering mechanism. | 08-20-2009 |
20090215480 | Method for reducing inter-cell interference - A method for reducing inter-cell interference and a method for transmitting a signal by a collaborative MIMO scheme, in a communication system having a multi-cell environment are disclosed. An example of a method for transmitting, by a mobile station, precoding information in a collaborative MIMO communication system includes determining a precoding matrix set including precoding matrices of one more base stations including a serving base station, based on signal strength of the serving base station, and transmitting information about the precoding matrix set to the serving base station. A mobile station in an edge of a cell performs a collaborative MIMO mode or inter-cell interference mitigation mode using the information about the precoding matrix set collaboratively with neighboring base stations. | 08-27-2009 |
20090253447 | Message-based approach for improved interference power estimation - A method of operating a base station comprising determining one or more time-frequency resources to be used for interference power estimation, generating a message indicating the one or more time-frequency resources to be used for interference power estimation, and transmitting the message to a subscriber station. | 10-08-2009 |
20090253448 | APPARATUS AND METHOD FOR AUTOMATICALLY CONTROLLING INTERFERENCE IN BROADBAND WIRELESS COMMUNICATION SYSTEM - An apparatus and method for automatically controlling interference in a broadband wireless communication system are provided. In the method, a BS receives an interference measurement information signal of one or more adjacent BSs. The BS analyzes the interference measurement information signal of the one or more adjacent BSs to obtain information about the average power for each frequency band used by each of the one or more adjacent BSs. The BS uses the obtained information about the average power for each frequency band of the one or more adjacent BSs to determine the average power for each frequency band to be used by the BS. The BS generates an interference measurement information signal of the BS according to the determined average power for each frequency band. | 10-08-2009 |
20090264142 | INTERCELL INTERFERENCE MITIGATION - Methods and apparatus are described for mitigating intercell interference in wireless communication systems utilizing substantially the same operating frequency band across multiple neighboring coverage areas. The operating frequency band may be shared across multiple neighboring or otherwise adjacent cells, such as in a frequency reuse one configuration. The wireless communication system can synchronize one or more resource allocation regions or zones across the multiple base stations, and can coordinate a permutation type within each resource allocation zone. The base stations can coordinate a pilot configuration in each of a plurality of coordinated resource allocation regions. Subscriber stations can be assigned resources in a coordinated resource allocation region based on interference levels. A subscriber station can determine a channel estimate for each of multiple base stations in the coordinated resource allocation region to mitigate interference. | 10-22-2009 |
20090286562 | SPATIAL INTERFERENCE MITIGATION FOR WIRELESS COMMUNICATION - Techniques for transmitting and receiving data with spatial interference mitigation in a wireless network are described. In one design of transmitting data with spatial interference mitigation, a first station (e.g., a cell) may receive spatial feedback information (SFI) from a second station (e.g., an interfered UE) that is not communicating with the first station. The second station may also receive preceding information from a third station (e.g., a served UE). The first station may send a data transmission to the third station based on the preceding information and the SFI in order to reduce interference to the second station. In one design, the SFI may include spatial nulling information. The first station may send the data transmission based on the spatial nulling information to steer the data transmission in a direction away from the second station. | 11-19-2009 |
20090286563 | METHOD AND APPARATUS FOR USING VIRTUAL NOISE FIGURE IN A WIRELESS COMMUNICATION NETWORK - Techniques for using virtual noise figure for various functions in a wireless communication network are described. A virtual noise figure is an indication of a virtual noise level at a receiver, which may be higher than an actual noise level at the receiver. In an aspect, virtual noise figure may be used for serving base station selection. A terminal may receive information indicative of a virtual noise figure for each of at least one base station. The terminal may select a serving base station based on the virtual noise figure for each base station. The terminal may send data to the serving base station at a rate selected based on an actual noise figure for the serving base station. In other aspects, virtual noise figure may be used for interference management and/or power control. | 11-19-2009 |
20090291699 | SPATIAL MODE ADAPTATION AT THE CELL EDGE USING INTERFERER SPATIAL CORRELATION - A system and method is proposed for adapting the spatial transmission strategy in a cellular MIMO (multiple input multiple output) communication system for the downlink. Spatial mode adaptation, the choice of multiplexing, transmit diversity, number of streams, space-time code family, and the like are performed slowly based on side information from other base stations. Base stations exchange their transmission plans with neighboring base stations and broadcast this information to active users. Each user measures its susceptibility to spatial interference and returns this information to the base station. The base station then schedules active users according to the decisions made in interfering base stations and the preferred transmission strategies of its own users. | 11-26-2009 |
20090312042 | INTER-SECTOR MACRODIVERSITY INTERFERENCE CANCELLATION AND SCHEDULING - The present invention provides a method for interference cancellation in a wireless communication system. One embodiment of a method includes accessing information indicative of one or more first signals transmitted by one or more first mobile units from one or more first sectors. The method also includes accessing information indicative of one or more second signals transmitted by one or more second mobile units from one or more second sectors different than the first sectors. The method further includes canceling interference caused in the second signal(s) by the first signal(s) using the accessed information indicative of the first signal(s) and the second signal(s). The method also includes jointly scheduling and allocating resources to one or more mobile stations in one or more sectors of one or more base stations. | 12-17-2009 |
20090312043 | INTERFERENCE MITIGATION FOR DEVICES WITH MULTIPLE RECEIVERS - Methods and systems for mitigating interference or estimating a covariance matrix in a communication system are disclosed. In some embodiments, a method of demodulating a received signal in a communication system includes receiving a first plurality of waveforms, estimating a covariance matrix based on the first plurality of waveforms, determining a spatial filter based on the estimated covariance matrix, receiving a second plurality of waveforms, generating at least one filtered waveform by applying the spatial filter to the second plurality of waveforms, and demodulating the at least one filtered waveform. | 12-17-2009 |
20100009705 | INTER-CELL INTERFERENCE CANCELLATION FRAMEWORK - Communication techniques enable efficient communication to UE (User Equipment) that is subject to a dominant interference signal that is transmitted by a different base station. Disclosed interference cancellation techniques, both UE-centric and network-centric, are suitable to this situation. These techniques are particularly advantageous when it is undesirable or difficult to introduce changes in the physical (PHY) and medium access control (MAC) layers at the existing base stations. An UE-centric framework refers to an approach largely implemented by UEs to include pico or femto cells. Network-centric framework closed-loop coordination between base stations and UEs achieves interference mitigation thereby improving network performance. In particular, an interfering base-station can help a “victim” UE by adjusting downlink pilot and control power and to adjust traffic data rates responsive to information that the “victim” UEs provide, including information about the interfering link and performance of the cancellation itself sent over the air or using backhaul. | 01-14-2010 |
20100022262 | METHOD AND ARRANGEMENT FOR REDUCING THE MUTUAL INTERFERENCE OF NETWORK SUBSCRIBERS IN RADIO NETWORKS - The object of the invention, which relates to a method and an arrangement for reducing the mutual interference of network subscribers in radio networks, is to provide a solution by means of which data collisions are reduced and thus the data throughput rate of a radio cell is increased. According to the invention, this object is achieved in terms of the method in that the cell size of a radio cell is adjusted by reducing the receiver sensitivity of one or more devices belonging to the radio cell if the device receives interference which disrupts its communication from another device belonging to a different radio cell. | 01-28-2010 |
20100022263 | SYSTEM AND METHOD FOR NETWORK MANAGEMENT - Various systems and methods for network management are disclosed. In one embodiment, a network management system comprises a receiver for receiving data from a plurality of entities, including base stations and/or subscriber handsets, a processor for generating a network map or a recommendation based on the received data, a display device for displaying the network map or recommendation, and a transmitter for transmitting instructions based on the recommendation. | 01-28-2010 |
20100041425 | METHOD FOR REDUCING INTERFERENCE IN THE DOWNLINK DIRECTION OF A CELLULAR RADIO COMMUNICATION NETWORK AND CORRESPONDING BASE STATION - The present invention relates to a method for reducing interference in the downlink direction of a cellular radio communication system comprising base stations communicating with terminals using a frame structure showing a time and frequency extension, said frame comprising a preamble portion and at least one data portion, said terminals being adapted to receive frames for which the receive power of said at least one data portion is varying in a predefined range relative to the receive preamble power of said preamble portion, | 02-18-2010 |
20100048232 | APPARATUS AND METHOD FOR TRANSMITTING DATA BASED ON QUANTIZED CHANNEL STATE INFORMATION - A base station apparatus including a receiving unit to receive, from a terminal, quantized channel state information with respect to a radio channel from a plurality of transmission antennas of the base station apparatus to a plurality of receiving antennas of the terminal. A control unit to determine a control ratio of interference signal to noise with respect to the radio channel based on the channel state information. A precoding matrix computing unit to compute a precoding matrix based on the control ratio of interference signal to noise and a transmission unit to transmit data to one or more of the connected terminals using the precoding matrix. | 02-25-2010 |
20100048233 | Apparatus and method for selecting precoding matrix in multiple antenna wireless communication system - A Mobile Station (MS) is operable to select a precoding matrix in a multi-antenna wireless communication system. The method includes receiving, from a serving Base Station (BS), information on a precoding matrix of which use is prohibited and a precoding matrix to be used by a neighbor BS, estimating an interference signal for the precoding matrix to be used by the neighbor BS, and selecting a precoding matrix to be used by the serving BS by considering the estimated interference signal from the remaining precoding matrixes except for the precoding matrix of which use is prohibited among precoding matrixes used by the serving BS. | 02-25-2010 |
20100056192 | Signal Cancellation in a Satellite Communication System - This a satellite communication system comprised of a hub and plurality of remote terminals, wherein the system is configured for frequency reuse, a method and apparatus for signal cancellation are disclosed. The disclosed method and apparatus enable the hub to extract return link signals overlaying a transmitted forward link signal, wherein the forward link signal is transmitted at a power level higher than that of the overlaying return link signals. | 03-04-2010 |
20100075703 | RADIO COMMUNICATION SYSTEM, RADIO COMMUNICATION APPARATUS, AND RETRANSMISSION CONTROL METHOD - In a multiuser MIMO system, entire system throughput achieved during retransmission is significantly enhanced. When an interference signal addressed to another user equipment (UE | 03-25-2010 |
20100099449 | INTERFERENCE MANAGEMENT WITH REDUCE INTERFERENCE REQUESTS AND INTERFERENCE INDICATORS - Techniques for managing interference in a wireless network are described. In an aspect, reduce interference requests and interference indicators may be used for interference management to enable operation in scenarios with dominant interferers. In one design, a terminal may receive a reduce interference request from a first base station requesting lower interference on specified time-frequency resources. The terminal may also receive an interference indicator conveying the interference observed by a second base station. The terminal may determine its transmit power based on the reduce interference request and the interference indicator. For example, the terminal may determine an initial transmit power based on the reduce interference request (or the interference indicator) and may adjust the initial transmit power based on the interference indicator (or the reduce interference request) to obtain its transmit power. The terminal may transmit data to a serving base station at the determined transmit power. | 04-22-2010 |
20100099450 | Inter-Cell Interference Mitigation Signalling Methods And Apparatus - An inter-cell interference mitigation signalling method for controlling the use of a plurality of inter-cell interference mitigation methods during wireless communications between a first wireless communications apparatus and a second wireless communications apparatus, the method comprising
| 04-22-2010 |
20100113077 | APPARATUS AND METHOD FOR UPLINK POWER CONTROL IN WIRELESS COMMUNICATION SYSTEM - An apparatus and method for controlling a transmit power of a sounding signal in a wireless communication system are provided. The method includes estimating a downlink Carrier to Interference and Noise Ratio (CINR) using at least one signal received from a Base Station (BS), determining a transmit power level for a sounding signal using a target CINR for the sounding signal, wherein the target CINR is determined based on the downlink CINR and multi-target CINR information, and transmitting the sounding signal according to the transmit power level. | 05-06-2010 |
20100144381 | POWER CONTROL METHOD AND APPARATUS FOR INTER-CELL INTERFERENCE REMOVAL - A power control method performs a scheduling on user terminals and then allows the user terminals to calculate power of interference by neighboring sectors, generates interference information to indicate how much the base stations in neighboring sectors, which interfere with each other, reduce transmission power based on the calculated power of interference, and informs a serving base station thereof. The base stations calculate throughput gain and throughput loss based on the interference information, and determine whether the reduction of the transmission power is performed based on the calculated throughput gain and throughput loss. | 06-10-2010 |
20100159972 | METHOD AND APPARATUS FOR EFFECTIVE MULTI-CELL INTERFERENCE CONTROL SERVICE - There are provided a method and apparatus for an effective multi-cell interference control service, to make it possible for users located at a cell boundary to dynamically select a suitable interference control technique by monitoring interference information collected by user terminals and network conditions of a serving base station and adjacent base stations to solve co-channel interference by adjacent cell users. | 06-24-2010 |
20100167771 | INFORMATION SHARING IN A PRIVATE ACCESS POINT NETWORK - This description relates to information sharing in a private access point network. | 07-01-2010 |
20100173660 | COORDINATED MULTIPOINT (CoMP) JOINT TRANSMISSION USING CHANNEL INFORMATION FEEDBACK AND HIGHER RANK DEDICATED BEAM-FORMING - A subscriber station is provided. The subscriber station comprises a receiver configured to listen for downlink control information for coordinated multipoint (CoMP) joint transmission only from an anchor cell, and to receive the downlink control information for CoMP joint transmission from the anchor cell. | 07-08-2010 |
20100203911 | METHODS AND SYSTEMS FOR EXTENDING RANGE AND ADJUSTING BANDWIDTH FOR WIRELESS NETWORKS - A Communications base-station configured to operate as a hub in a wireless network and provide communication services to a set of remote customer devices using a wireless protocol is disclosed. The communications base-station includes an antenna array having a plurality of antennae arranged in a fashion as to enable the antenna array to transmit and receive wireless signals in both a substantially omnidirectional and non-omnidirectional pattern, a physical layer (PHY) device coupled to the antenna array and configured to transmit and receive wireless signals and a media access control (MAC) device coupled to the PHY device and configured to direct the antenna array to concurrently provide beamformed wireless signals to a first customer device and omnidirectional wireless signals to second customer device. | 08-12-2010 |
20100203912 | Methods for reducing inter-cell interference by precoding signals for transmission in wireless MIMO system - Methods for suppressing inter-cell interference during data transmission using a preceding matrix are provided. Inter-cell interference is suppressed by precoding data (or information) signals for transmission from base station to mobile or vice versa. Methods according to example embodiments also increase intra-cell data transmission rates. The precoding matrix is generated based on estimated channel coefficients for propagation channels between a base station and mobiles inside and outside the base station's coverage area. | 08-12-2010 |
20100203913 | METHOD FOR MANAGING SUB-BAND PREFERENCE ORDER IN A WIRELESS COMMUNICATION SYSTEM - Techniques for allocating resources in a wireless communications network are provided. According to certain aspects, a scheme is provided, wherein resources of sub-bands associated with non-interfering links are allocated before resources of sub-bands associated with interfering links. | 08-12-2010 |
20100216497 | BASE STATION AND INTERFERENCE REDUCTION METHOD IN BASE STATION - A radio communication system including mobile terminals and plural base stations each of which communicates with mobile terminals existing in a subordinate cell. Each of the base stations includes an interference power measurement portion which measures a total interference power received from mobile terminals existing in adjacent cells; an interference reduction request portion which issues a request to reduce interference to base stations of the adjacent cells based on the total interference power; and a control portion which notifies mobile terminals existing in a subordinate cell of transmission power control information when the request to reduce interference is received from a base station of an adjacent cell, so as to reduce the interference. Each of the mobile terminals includes a reception portion which receives the transmission power control information from the base station that is requested to reduce the interference from the base station of the adjacent cell. | 08-26-2010 |
20100222092 | Method And Apparatus For Transient Frequency Distortion Compensation - Transient distortion is compensated for by multiplying an exponentially-decaying phase shift onto the distorted waveform. The exponentially decaying phase shift waveform is patterned after the transient which typically takes the form of an exponential and occurs upon introduction of power to a circuit or circuit component. A digital circuit produces an appropriate exponentially-decaying waveform which is used as the input for a look up table whose output is a complex sinusoidal waveform capable of compensating for the distortion. The complex sinusoid is multiplied onto the transmitted waveform. The decaying exponential is biased so that it crosses a threshold at which point the compensating circuitry is turned off. | 09-02-2010 |
20100227635 | NETWORK APPARATUS AND METHOD FOR SELECTING TARGET TERMINAL TO PERFORM COMMUNICATION ACCORDING TO INTERFERENCE ALIGNMENT SCHEME - Provided is a signal transmission system including a terminal to receive a signal using an interference alignment scheme, and a transmitting base station to transmit, to the terminal, a signal where interference is aligned. The transmitting base station may select, from a plurality of terminals, a target terminal to receive the signal using the interference alignment scheme. The selected target terminal may receive the signal from the transmitting base station and receive interference signals from a plurality of interference base stations. | 09-09-2010 |
20100234053 | SYSTEMS AND METHOD FOR COORDINATED MULTIPOINT DOWNLINK TRANSMISSIONS - A method for determining antenna weights for use in transmitting data from a plurality of base stations to a user device is disclosed. The antenna weights are determined using an input covariance matrix (S), and the input covariance matrix is determined subject to a predetermined power constraint and a predetermined, non-zero interference constraint. | 09-16-2010 |
20100234054 | SYSTEM FOR CONTROLLING INTER CELL INTERFERENCE IN CELLULAR MOBILE SYSTEM - Provided is a technology that eliminates or decreases inter-cell interference through an inter-cell cooperation in a cellular mobile communication system. A terminal generates channel state information (CSI) with respect to a plurality of base station, and transmits the CSI to a serving cell. The serving cell shares the CSI with a cooperation cell, and determines a cooperation transmission mode that decreases interference from the cooperation cell. | 09-16-2010 |
20100248762 | Method and System for Mitigating Interference Between a Plurality of Femtocells Utilizing Transmission Deferral - Aspects of a method and system for mitigating interference between a plurality of femtocells utilizing transmission deferral are provided. In this regard, prior to transmission of cellular signals by a femtocell, the femtocell may be operable to detect signals that interfere with cellular communications between the femtocell, one or more base stations, and a cellular enabled communication device that communicates with the femtocell. The femtocell may be operable to defer transmission of the cellular signals for a particular period of time based on the detected interfering signals. During transmission of cellular signals from the femtocell to a cellular enabled communication device, the femtocell may be operable to detect loss of one or more packets of data. The femtocell may be operable to defer transmission of the cellular signals for a particular period of time based on the detected loss of one or more packets of data. | 09-30-2010 |
20100261493 | INTER-CELL INTERFERENCE MITIGATION - A method and Coordinated Multi-Point (CoMP) cell controller for reducing interference in a wireless communication network in which a first CoMP cell neighbors a second CoMP cell. The CoMP cell controller in the first CoMP cell gathers scheduling information from border sub-cells in the neighboring second CoMP cell in which transmissions to and from UEs cause inter-CoMP cell interference in at least one sub-cell in the first CoMP cell. The CoMP cell controller augments intra-CoMP cell scheduling information in the first CoMP cell with the scheduling information from the border sub-cells to create augmented scheduling information. The CoMP cell controller then utilizes the augmented scheduling information to schedule transmissions to and from UEs within the at least one sub-cell in the first CoMP cell to reduce the inter-CoMP cell interference. | 10-14-2010 |
20100273514 | METHOD FOR PERFORMING CoMP OPERATION AND TRANSMITTING FEEDBACK INFORMATION IN A WIRELESS COMMUNICATION SYSTEM - A method for performing a Coordinated Multi-Point (CoMP) operation and transmitting feedback information in a wireless communication system is disclosed. The method includes measuring interference levels or noise and interference variances of reference signals received from one or more neighbor cells, and transmitting to a serving Base Station (BS) information about the measured interference levels or noise and interference variances, and information about a Precoding Matrix Index (PMI) that a mobile station (MS) wants to restrict or recommend for a neighbor cell performing the CoMP operation. | 10-28-2010 |
20100279724 | MITIGATING INTERFERENCE IN A COMMUNICATION NETWORK - Aspects relate to mitigating interference in a communication network that does not employ a centralized scheduler. A transmission sent on a subset of resources is evaluated to determine a number of communication pairs that have selected that subset of resources on which to transmit. If there are a large number of communication pairs transmitting on that subset, the transmission is ignored by a receiving device. The number of degrees of freedom that contain energy on the subset is evaluated to determine if an expected number of degrees of freedom that should have energy is met or exceeded. If the expected threshold number is met or exceed, the transmission is decoded by the receiving device, else the transmission is not decoded. | 11-04-2010 |
20100298015 | Method and Apparatus for Improving the Performance of a Mobile Radio Communications System by Adjusting Antenna Patterns - The present invention relates to a method of improving the performance of a mobile radio communications system comprising at least one stationary radio transmitter for communicating with user equipments in the communications system, wherein the radio transmitter is connected to an antenna system for which the antenna pattern can be varied, the method comprising: receiving direction-of-propagation information relating to a plurality of user equipment transmission samples, wherein a user equipment transmission sample includes information relating to at least one direction of propagation by which successful communication between a user equipment and the radio transmitter has been established at a particular point in time; selecting ( | 11-25-2010 |
20100298016 | SYSTEMS, APPARATUS AND METHODS FOR INTERFERENCE MANAGEMENT ON DOWNLINK CHANNELS IN WIRELESS COMMUNICATION SYSTEMS - Systems, methods, apparatus and computer program products to facilitate determining nominal interference from one or more interfering base stations are provided. In one embodiment, the method can include computing a nominal interference. The method can also include transmitting the nominal interference to one or more interfering base stations. The nominal interference can be transmitted to at least one of the one or more interfering base stations to compute a loss in transmission rate to a user equipment in a selected cell if at least one of the one or more interfering base stations transmits over a same set of resources on which the user equipment in the selected cell receives information. | 11-25-2010 |
20100311449 | Method and Device in a Communication Network - There is provided a method of operating a base station, the method comprising determining whether there are any mobile devices that are not associated with the base station that require protection from interference caused by downlink transmissions of the base station; and setting a maximum permitted transmission power for the base station based on the result of the step of determining. | 12-09-2010 |
20100311450 | METHOD AND APPARATUS FOR PROVIDING CARRIER INDICATION AND CARRIER SENSING IN A WIRELESS NETWORK - An approach is provided for carrier indication and carrier sensing. Interference information relating to radio interface with one or more neighboring nodes is generated. The interference information is transmitted over a designated channel to the one or more neighboring nodes. | 12-09-2010 |
20100317382 | NETWORK ACCESS METHOD IN MOBILE COMMUNICATION SYSTEM AND TERMINAL SUPPORTING THE SAME - With regard to any nucleotide and/or amino acid sequence disclosed in the international application and necessary to the claimed invention, the international search was carried out on the basis of: | 12-16-2010 |
20100317383 | METHOD OF OPTIMAL DATA TRANSMISSION FOR IMPROVING DATA TRANSMISSION RATE IN MULTI-HOP WIRELESS NETWORK - There is provided a method for optimal data transmission for improving a data transmission rate of a node with variable transmission power in a multi-hop wireless network, the method including the steps of: obtaining channel state information about a current wireless channel of the node; calculating a carrier sensing range in the number of hops using the obtained channel state information, a target signal-to-interference ratio, and a contention window size in order to minimize data collision; calculating the number of nodes attempting data transmission based on signals received from neighbor nodes, the number of the nodes attempting data transmission being the number of contention nodes; and setting transmission power adaptively according to the calculated carrier sensing range value and the contention node numbers and transmitting data with the set of transmission power. | 12-16-2010 |
20100317384 | WIRELESS COMMUNICATION SYSTEM, WIRELESS BASE STATION, METHOD OF CONTROLLING TRANSMISSION OF COMMON PILOT SIGNAL IN WIRELESS COMMUNICATION SYSTEM, AND PROGRAM - In a wireless communication system that includes wireless base station ( | 12-16-2010 |
20100317385 | Method and System for Mitigating Inter-Cell Interference - A method for processing transmission power level related data includes obtaining channel gain data from at least a served first user equipment and providing performance related data for at least the served first user equipment. The method also includes obtaining determined transmission power level data per group of resource blocks, as determined at a super frame level, and providing transmission power related pilot signals to the served first user equipment. Additionally the method includes obtaining channel quality related information from at least the served first user equipment and adapting the transmission power level per resource block on the frame level, wherein adapting the transmission power level comprises altering the determined transmission power level as determined per group of resource blocks at the super frame level, in dependence on the obtained channel quality related information related to at least the served first user equipment and the obtained channel gain data. | 12-16-2010 |
20100323731 | WIRELESS COMMUNICATION OBSTACLES FOR IMPROVING WIRELESS COMMUNICATIONS - The present disclosure generally relates to methods for improving wireless communications. Example embodiments include placing a wireless communication obstacle at an optimal or approximately optimal position to improve one or more characteristics of a wireless communication link between two wireless communication devices. The wireless communication obstacle may be adapted to absorb or reflect one or more wireless communications from other wireless communication devices to prevent and/or reduce interference with the wireless communication link between the two wireless communication devices. | 12-23-2010 |
20100323732 | Radio Communication Method, Radio Communication Base Station Apparatus, Radio Communication Mobile Station Apparatus, And Radio Communication System - A radio communication method in a radio communication system in which radio communication is performed between a radio communication base station apparatus and a radio communication mobile station apparatus, including: transmitting, by the radio communication mobile station apparatus, an implementation loss value of the radio communication mobile station apparatus to the radio communication base station apparatus. | 12-23-2010 |
20100323733 | FRAME STRUCTURE FOR AN ADAPTIVE MODULATION WIRELESS COMMUNICATION SYSTEM - A method of simplifying the encoding of a predetermined number of bits of data into frames including adding error coding bits so that a ratio of the frame length times the baud rate of the frame times the bit packing ratio of the data divided the total bits of data is always an integer. The method may also convolutionally encode the bits of data so that the same equation is also always an integer. | 12-23-2010 |
20100331026 | Determination of coupling between radio devices - A method includes transmitting, from a radio device of a secondary communication system, a signal into a channel of a primary communication system; monitoring channel signal quality-related feedback of the primary system; determining, based on the monitored channel signal quality-related feedback, an amount of mutual coupling between the transmitted signal and the channel, if any, caused by the transmitted signal; and if the amount of determined mutual coupling is less than a threshold amount, using the channel for communication with another radio device of the secondary communication system. The signal that is transmitted may be a probing signal having at least a predetermined temporally varying transmission pattern, and where determining includes correlating at least the predetermined temporally varying transmission pattern with changes, if any, in the monitored channel signal quality-related feedback. The channel signal quality-related feedback that is monitored may include at least one of ACK/NACK feedback, power control feedback, rate control feedback and channel quality indicator feedback. | 12-30-2010 |
20100331027 | METHOD AND APPARATUS FOR MANAGING CELLULAR UPLINK TRANSMISSIONS - A method and apparatus used in an interfering cell of a cellular radio communication system for managing uplink transmissions. Information is received at the interfering cell, including a magnitude of an interference measured in a neighboring cell. The interfering cell has one or more active communication links to respective communication devices. A determination is made that a communication device will transmit pending data using a data repetition mode. The determination is based on the magnitude of the interference. In some embodiments, a specific data repetition mode is determined, based at least on the magnitude of the interference. A command is sent to the communication device to transmit the pending data using the specific data repetition mode. | 12-30-2010 |
20110003605 | METHOD AND APPARATUS FOR ALLOCATING DOWNLINK POWER IN WIRELESS COMMUNICATION SYSTEM - A method and apparatus of allocating downlink power in a radio access station system are disclosed. The method of allocating transmission power to a plurality of terminals in a radio access station system according to the present invention includes (A-1) calculating an allocation power for the respective terminals based on downlink quality information of the respective terminals; (A-2) calculating a minimum requirement power for the respective terminals based on the downlink quality information; and (A-3) allocating the transmission power by distributing part of excess power of a first terminal group having the allocation power higher than the minimum requirement power to the second terminal group having the allocation power lower than the minimum requirement power, and the part of excess power is a sum of insufficient power of the second terminal group. As a result, the loss of the quantity of service transmission of the radio access station is reduced and service areas can be expanded. | 01-06-2011 |
20110003606 | System and method for managing inter-cluster handoff of clients which traverse multiple DIDO clusters - A system and method are described for adjusting communication with a first distributed-input-distributed-output (DIDO) client as the first DIDO client moves from a first DIDO cluster to a second DIDO cluster: For example, in one embodiment of the system and method, different signal strength thresholds are specified and either conventional DIDO precoding and/or DIDO precoding with inter-DIDO-cluster interference (IDCI) cancellation to avoid RF interference at the DIDO client are employed based on measured signal strengths from a main DIDO cluster and an interfering DIDO cluster. | 01-06-2011 |
20110003607 | Interference management, handoff, power control and link adaptation in distributed-input distributed-output (DIDO) communication systems - A system and method are described herein employing a plurality of distributed transmitting antennas to create locations in space with zero RF energy. In one embodiment, when M transmit antennas are employed, it is possible to create up to (M−1) points of zero RF energy in predefined locations. In one embodiment of the invention, the points of zero RF energy are wireless devices and the transmit antennas are aware of the channel state information (CSI) between the transmitters and the receivers. In one embodiment, the CSI is computed at the receivers and fed back to the transmitters. In another embodiment, the CSI is computed at the transmitter via training from the receivers, assuming channel reciprocity is exploited. The transmitters may utilize the CSI to determine the interfering signals to be simultaneously transmitted. In one embodiment, block diagonalization (BD) precoding is employed at the transmit antennas to generate points of zero RF energy. | 01-06-2011 |
20110003608 | System and method for managing handoff of a client between different distributed-input-distributed-output (DIDO) networks based on detected velocity of the client - A system and method are described for adjusting communication with a first distributed-input-distributed-output (DIDO) client. For example, a method according to one embodiment comprises: sending RF energy to the DIDO client from one or more antennas of a DIDO network; estimating a current velocity of the DIDO client; and assigning the client to a particular DIDO network based on the estimated velocity of the client. | 01-06-2011 |
20110009136 | RESOLUTION ALGORITHMS FOR MULTI-RADIO COEXISTENCE - Systems and methodologies are described herein that facilitate resolution between respective radios associated with a multi-radio wireless device. As described herein, various techniques can be utilized with a multi-radio coexistence manager and/or other suitable mechanisms associated with a wireless device to perform joint resolution for multiple associated radios, thereby providing performance enhancements over conventional piecewise radio resolution schemes. Various exhaustive, decoupled, and progressive radio resolution algorithms are provided herein, by which respective sets of parameters (e.g., transmit powers, interference targets, frequency sub-bands, radio frequency knob settings, etc.) can be selected for respective potentially conflicting radios to enable such radios to operate in coexistence. Further, techniques are provided herein for utilizing a graph theoretic algorithm for progressive radio resolution. In addition, a generic power resolution algorithm can be modified to provide support for multi-transmitter interference mechanisms by employing modifications such as joint power resolution and/or one-pass or iterative interference partitioning. | 01-13-2011 |
20110009137 | METHOD OF MEASURING INTERFERENCE - A method of measuring interference to perform efficient data communication is disclosed. A method of measuring interference of neighboring cells comprises allocating one or more first resource elements, to which pilot signals are allocated, to predetermined symbol regions included in a first resource block; allocating one or more second resource elements for measuring interference of the neighboring cells to a first symbol region of the predetermined symbol regions; and measuring interference of the neighboring cells using the one or more second resource elements. | 01-13-2011 |
20110021221 | RADIO COMMUNICATION METHOD, BASE STATION APPARATUS AND TERMINAL APPARATUS IN RADIO COMMUNICATION SYSTEM, AND RADIO COMMUNICATION SYSTEM - A radio communication method for performing a radio communication between a first and second movable base station apparatuses and a subordinate terminal apparatus respectively, the method including: transmitting and receiving configuration information relating radio resource and load information relating the subordinate terminal apparatus in the first and second base station apparatuses respectively, via the terminal apparatus located in an overlapped communicable range of the first and second base station apparatuses, when the first and second base station apparatuses perform radio communication using the same radio resource, by the first and second base station apparatuses respectively; and performing interference control based on the configuration information and the load information, by the first and second base station apparatuses respectively. | 01-27-2011 |
20110021222 | Methods and Arrangements for Memory-Efficient Estimation of Noise Floor - The present invention relates to a method and arrangement in a wireless communication system, e.g. an evolved UMTS Terrestrial Radio Access Network, for improved scheduling and admission control of the uplink by providing an improved determining of power-related quantities, e.g. neighbour cell interference levels, for specific tones and providing more accurate recursive estimation of noise-related quantities, e.g. noise floor power estimates, for specific tones. The method and arrangement obtains a neighbour cell interference measure for each subset of tones from at least a noise floor measure for each subset of tones based on combined power quantities from the total uplink power per subset of tones and dividing said noise floor measure into sub noise floor measures for each subset of tones, said dividing dependent on the bandwidth of each subset of tones. | 01-27-2011 |
20110028169 | METHOD FOR OPERATING A COMMUNICATION TERMINAL - The invention discloses a method for operating a communication terminal comprising a receiver chain (EK) with at least one receiver component (RXD) and with an amplifier device (LNA) connected upstream thereof for receiving broadcast radio signals transmitted in first time periods in a predetermined frequency band, and also a transmission device (SEM) for transmitting radio signals. The method has the following steps. First of all, the noise occurring upon transmission of the radio signals in the frequency band of the receiver chain is measured in the receiver chain and then the gain of the amplifier device is set on the basis of the measured noise such that a maximum signal level on the receiver component is not exceeded. Measurement of the noise occurring by the transmission device thus allows the receiver chain to be protected by setting the amplifier device such that the signal level caused by the noise, in particular, is not exceeded, but the maximum possible sensitivity of the receiver chain for receiving radio signals can be set. | 02-03-2011 |
20110028170 | TRANSMISSION POWER ALLOCATION METHOD, COMMUNICATION DEVICE AND PROGRAM - There is provided a method for allocating a transmission power to a second communication service making secondary usage of a spectrum assigned to a first communication service, in a node which is able to communicate with a secondary usage node, comprising the steps of: determining an interference power acceptable for two or more second communication services when the two or more second communication services are operated; distributing a transmission power depending on the interference power among the two or more second communication services according to a first rule; distributing the transmission power similarly according to a second rule; selecting one of the first rule and the second rule based on transmission powers distributed according to the first rule and transmission powers distributed according to the second rule; and allocating the transmission powers distributed according to the selected rule respectively to the two or more second communication services. | 02-03-2011 |
20110034191 | System and Methods for Wireless Broadband Delivery of Data - A system and method for wireless data delivery is provided. The communication may be between the antenna arrays of an airborne platform (such as aircraft) and a surface base station. The antenna arrays may generate a plurality of directional synchronization beams directed in at a plurality of corresponding spatial directions. Other antenna arrays receive the directional synchronization beam and respond in kind, providing the original antenna array a way to determine directionality of the other antenna arrays. The antenna arrays may then receive a training beam. The training beam includes known data, such as a Fourier Matrix, which may then be utilized to generate weights. Weights may then be utilized to modify either of the phase or amplitude of a base signal which is then sent to each of the elements of the antenna array in order to achieve directionality of the signal propagation. Thus, a directional beam may be formed which is oriented toward the source of the training beam, which may be a base station or the like. It may also be desirable to identify sources of interference. Interference sources are all non-desired sources of radiation within the target frequency range. Lastly, the system may steer one or more nulls in order to substantially attenuate the sources of interference. | 02-10-2011 |
20110034192 | METHOD FOR AVOIDING INTER-CELL INTERFERENCE IN A MULTI-CELL ENVIRONMENT - A method for avoiding an inter-cell interference (ICI) in a multi-cell environment is disclosed. The method includes restricting the use of a PMI in an interfering cell so as to improve a reception performance of a mobile station located at an interfered cell edge. The mobile station measures a restricted-PMI of the interfering cell, which is prohibited from use in the interfering cell, and transmits the measured restricted PMI to the interfering cell. The use of the restricted PMI is prohibited from use in a mobile station in the interfering cell. | 02-10-2011 |
20110039589 | METHOD AND APPARATUS FOR PROVIDING POWER CONTROL OF A WIRELESS TERMINAL - An approach is provided for power control. The sum of path gain relating to non-serving sectors is determined. Power spectrum density (PSD) is determined according to a power control scheme. A power level is set based on the power spectrum density (PSD). | 02-17-2011 |
20110045856 | INTER-CELL INTERFERENCE COORDINATION METHOD AND BASE STATION - An inter-cell interference coordination method comprises: measuring an interference over thermal noise of a first subcarrier resource block in an uplink direction and obtaining an interference over thermal noise measurement value by a first base station; judging whether a first high interference indicating message is received from a second base station when the interference over thermal noise measurement value is larger than a first preset threshold value by the first base station; sending an overload indicator message to the second base station which has sent the high interference indicating message or shielding the first subcarrier resource block by the first base station when the first high interference indicating message is received; and sending the overload indicator message to base stations to which all the neighboring cells belong by the first base station when the first high interference indicating message is not received. The overhead at X2 interface is reduced according to the present invention. | 02-24-2011 |
20110053622 | FILTER UNIT, MOBILE COMMUNICATION TERMINAL TEST SYSTEM, AND MOBILE COMMUNICATION TERMINAL TEST METHOD - [Problem] To provide a band stop filter unit, a mobile communication terminal test system, and a mobile communication terminal test method that are flexibly adaptable to the addition/change of a specification in a frequency band for mobile communication. | 03-03-2011 |
20110065464 | BOOSTING A SIGNAL-TO-INTERFERENCE RATIO OF A MOBILE STATION - In a cell of a cellular wireless communication system, the SIR of at least one user in a sector of the cell is altered by temporarily reducing transmissions on a forward link in at least one other sector of the cell or a sector in another cell in accordance with a pattern. | 03-17-2011 |
20110077034 | Method and System for Reducing Channel Interference in a Frame-Synchronized Wireless Communication System - Base stations having potentially interfering terminal stations that are geographically located on the same or similar diagonal or Line of Sight (relative to the base station) operate on a first set of time frames (e.g., “even” time frames). Similarly, base stations having potentially interfering terminal stations that are not geographically located on the same or similar diagonals operate on a second set of time frames (e.g., “odd” time frames). By alternating in their use of the even and odd frames, the potential for co-channel interference between terminal stations is minimized. Systems and methods are disclosed which reduce co-channel and adjacent channel interference between terminal stations of different cells as well as adjacent channel interference between terminal stations of adjacent cells. The methods and systems so described can be used during the deployment or expansion of a communication system in a region. | 03-31-2011 |
20110086651 | TECHNIQUES FOR INTERFERENCE MITIGATION IN MULTI-TIER COMMUNICATION SYSTEM - A method and a Mobile Station (MS), for use in a wireless communication network comprising a plurality of Base Stations (BSs) capable of communicating with a plurality of MSs, wherein at least some of the BSs are Femtocell BSs (FBSs) and at least some of the BSs are Macrocell BSs (MBSs), for mitigating interference are provided. The method includes detecting, by an MS, an interfering Closed Subscriber Group (CSG) FBS that the MS is not authorized to access, and transmitting, by the MS, a request for mitigation of interference. | 04-14-2011 |
20110086652 | Method and apparatus for allocating physical cell identifier in wireless communication system - A method and apparatus allocates a Physical Cell Identifier (PCID) in a wireless communication system by considering a PCID reuse factor. An allowable PCID list is acquired from a server. A set of candidate PCIDs is determined from the allowable PCID list according to PCID allocation conditions. A received signal strength of each cell using the determined set of candidate PCID is determined. At least one PCID is selected by using a PCID reuse factor and the received signal strength of each of the cells using the determined set of candidate PCIDs. | 04-14-2011 |
20110086653 | REUSE PATTERN NETWORK SCHEDULING USING INTERFERENCE LEVELS - Interference levels occurring at one or more stations are mapped, and a reuse pattern is generated, based on the mapped interference levels, including one or more reuse sets of stations capable of sharing a transmission resource. The stations within each reuse set are listed in increasing order based on their respective interference levels, and an additional station is added to a reuse set, as long as the cumulative interference level within the reuse set is below a threshold interference level and the additional station is not already listed in another reuse set. A network schedule is updated based on the reuse pattern to increase bandwidth efficiency in the network. | 04-14-2011 |
20110086654 | Intercell Interference Reduction - A distributed antenna system based wireless cellular communication system with transmit side linear interference cancellation is described. In this system the effective complex channel elements (I) and (II) are estimated and reported by mobile station MS | 04-14-2011 |
20110092231 | TIME AND FREQUENCY ACQUISITION AND TRACKING FOR OFDMA WIRELESS SYSTEMS - Obtaining a timing reference in wireless communication is facilitated when desiring to communicate with a weak serving base station (such as an evolved NodeB) in the presence of a stronger interfering base station. The user equipment (UE) may track a stronger interfering base station's timing, or the UE may track a timing that is derived by a composite power delay profile (PDP) from multiple base stations. The composite PDP may be constructed by adjusting individual base station PDPs according to a weighting scheme. The timing obtained in such a manner may be used for estimation of the channel of the interfering base station and cancelling interfering signals from the base station. It may also be used to estimate the channel of the serving base station after adding a backoff. The UE may track a stronger interfering base station's frequency, or the UE may track a composite frequency. | 04-21-2011 |
20110092232 | APPARATUS AND METHOD FOR ELIMINATING INTER CELL INTERFERENCE IN MULTIPLE INPUT MULTIPLE OUTPUT WIRELESS COMMUNICATION SYSTEM - Provided is a device and a method for eliminating inter-cell interference in Multiple Input Multiple Output (MIMO) wireless communication system. The method for operating a user equipment for eliminating the inter-cell interference includes determining one or more optimum bands among bands not requested to be restricted from a neighboring cell, determining at least one of band and Precoding Matrix Index (PMI) to be requested to be restricted to the neighboring cell among the determined one or more optimum bands, and feeding back at least one of the band and PMI to be requested to be restricted to the neighboring cell to a serving base station. | 04-21-2011 |
20110098067 | MOBILE COMMUNICATION SYSTEM, BASE STATION AND INTERFERENCE REMOVAL METHOD - A base station of the present invention includes: first and second antenna elements that have polarization characteristics orthogonal to each other; a first converter that converts a received signal of the first antenna element into a baseband signal; a first multiplier that weights the baseband signal converted by the first converter by multiplying a first weight coefficient; a second converter that converts a received signal of the second antenna element into a baseband signal; a second multiplier that weights the baseband signal converted by the second converter by multiplying a second weight coefficient; an adder that adds the baseband signals weighted by the first and second multipliers and outputs the sum; and, a signal processor that calculates the first and second coefficients by MMSE such that the combined polarization of the received signals of the first and second antenna elements will be orthogonal to the polarization of an interference signal. | 04-28-2011 |
20110105163 | METHOD FOR INTER-CELL INTERFERENCE MANAGEMENT IN CELLULAR SYSTEM - Provided is a method for inter-cell interference management in a cellular system. More particularly, provided is a method for inter-cell interference avoidance that may not require signaling between base stations and a complex cell planning. | 05-05-2011 |
20110105164 | METHOD FOR AVOIDING INTER-CELL INTERFERENCE IN MULTI-CELL ENVIRONMENT USING MULTIPLE CODEBOOKS - A method is disclosed for avoiding inter-cell interference in a closed-loop multiple-input multiple-output (MIMO) system using a plurality of codebooks. A base station of a serving cell transmits information about codebooks used in an interfering cell among the plurality of codebooks to a mobile station. The transmission of the information may be made at the request of the mobile station. Alternatively, the mobile station may directly measure information about codebooks used in the interfering cell among the plurality of codebooks. The mobile station measures restricted precoding matrix indexes (PMIs) or requested PMIs based on the codebook information. The measured PMIs are transmitted to the interfering cell and are used to restrict the use of a PMI in the interfering cell. | 05-05-2011 |
20110111779 | INTERFERENCE REDUCTION FOR TERMINALS OPERATING IN HETEROGENEOUS WIRELESS COMMUNICATION NETWORKS - A wireless communication infrastructure entity in a wireless communication system implementing an uplink control channel using a narrowband frequency resource within a wideband frequency resource. The entity includes a controller communicably coupled to the transceiver wherein the controller is configured to cause the transceiver to signal a location for an uplink control channel within the wideband frequency resource. The uplink control channel includes at least a pair of uplink control channels separated within the wideband frequency resource and accommodates simultaneous uplink transmissions by multiple user equipment communicating in the wireless communication system. | 05-12-2011 |
20110124356 | METHOD AND SYSTEM OF CHANNEL DETECTING AND REPORTING, TERMINAL, AND MANAGEMENT CENTER - A method and a system of channel detecting and reporting, a terminal, and a management center are provided. The method includes: a first access device of a terminal detects a channel status of one or more channels; and a second access device of the terminal reports a channel detection result detected by the first access device to destination equipment through an access network. The system includes a terminal and a management center. The terminal can access an access network through various access devices and report a channel detection result to the management center. The management center adjusts communication parameters of relevant equipment according to the detection result. The channel detection result can be reported in time, so that communication dead zones are prevented, and probability of long-term interference on hidden nodes in a communication system is reduced. | 05-26-2011 |
20110130160 | RADIO BASE STATION AND RADIO COMMUNICATION METHOD - A radio base station (BS) includes: a radio communication unit ( | 06-02-2011 |
20110136523 | APPARATUS FOR CONTROLLING TRANSMISSION DATA AND METHOD THEREOF - A method for controlling data transmission in a station in a wireless communication network, the method including: receiving feedback information including error information including a signal to noise ratio (SNR) from a target station, the error information being measured by the target station; and controlling transmission parameters of the transmit data in a transmitting station based on the error information, wherein controlling the transmission parameters includes: increasing the transmit power when the SNR is lower than a predetermined value; initiating a beam-tracking process when the SNR is still lower than the predetermined value after increasing the transmit power; and decreasing a data transmission rate when the SNR is still lower than the predetermined value after initiating the beam-tracking process. | 06-09-2011 |
20110143792 | Methods, System, and Computer Program Product for Optimizing Signal Quality of a Composite Received Signal - Signal quality of a composite received signal in a radio communication network is optimized by adjusting a phase offset between received and/or transmitted signals based on signal quality parameters of the received and/or transmitted signals. The phase offset is adjusted by varying the phase offset between the received or transmitted signals such that that the composite signal is circularly, elliptically, or linearly polarized. The phase offset between the received or transmitted signals is continually adjusted based on the received signal quality parameters. | 06-16-2011 |
20110143793 | BASE STATION FOR OPERATING COOPERATIVE MULTI-POINTS TRANSMISSION AND RECEPTION (CoMP) - Provided is a base station for operating a Cooperative Multi-Points Transmission and Reception (CoMP). A base station of a serving cell may perform scheduling according to an Inter-cell Interference Coordination (ICIC) scheme from a point in time when a service is provided to a user equipment (UE). When a Precoding Matrix Index (PMI) coordination is required, the base station of the serving cell may perform the PMI coordination in interoperation with a neighboring cell. In addition, when a status of the UE satisfies a particular condition, the base station of the serving cell may perform the aforementioned ICIC scheme and the PMI coordination. Also, the base station of the serving cell may perform the aforementioned ICIC scheme and the PMI coordination together. | 06-16-2011 |
20110151906 | Multi-Carrier Frequency Assignment Method - In a method and a device for frequency planning of a multi carrier cellular radio system, a cost function that reflects a multi carrier function is used. Using the method and the device the frequency optimization can be made to take into account systems employing multi carrier techniques whereby the planning complexity and time for operators is reduced. | 06-23-2011 |
20110151907 | METHOD AND APPARATUS FOR CONTROLLING INTERFERENCE BETWEEN BASE STATIONS - A method for controlling interference between base stations in a radio communication system in which an indirect interface for indirectly connecting the base stations exists and an direct interface for directly connecting the base stations does not exist, the method includes: converting a first interference control message used in the direct interface into a format of a protocol of the indirect interface to thereby generate a second interference control message; and transmitting the second interference control message through the indirect interface. | 06-23-2011 |
20110151908 | MOBILE COMMUNICATION SYSTEM, BASE STATION AND INTERFERENCE CANCELLATION METHOD - The base station includes: a first combiner which weights the BB signals received by first and second antenna elements by first and second weight coefficients and adds them; a second combiner which weights the BB signals received by third and fourth antenna elements by first and second weight coefficients and adds them; a third combiner which weights the BB signals added by the first and second combiners by third and fourth weight coefficients and adds them; a first processor which calculates such first and second weight coefficients that a combined polarization of the received signals of each antenna is orthogonal to a polarization of an interfering signal existing in the same direction as a desired signal; and a second processor which calculates such third and fourth coefficients that a null is formed in a direction different from the desired signal and in which an interfering signal exists. | 06-23-2011 |
20110159897 | SYSTEM AND METHOD USING RATE SPLIT SCHEME BASED ON COOPERATION BETWEEN RECEIVERS - Each of a first transmitter and a second transmitter uses a rate split scheme. Each of the first transmitter and the second transmitter may transmit at least four sub-messages, and different transmission powers may be allocated to the at least four sub-messages. Also, each of receivers may cooperate with each other, may share sub-messages that act as interferences, and may extract desired messages using the shared sub-messages. | 06-30-2011 |
20110159898 | Managing interference due to Low power BSs - A system and method for managing radio frequency interference of a low power base station is disclosed. The method comprises determining that the low power base station is causing substantial interference in a data link between a mobile station and a macro base station. The low power base station is identified as having a closed subscriber group (CSG) that is in CSG-Closed mode. The CSG low power base station is converted from CSG-Closed mode to a CSG-Open mode to allow the mobile station to communicate through the CSG low power base station. | 06-30-2011 |
20110159899 | OUTER LOOP POWER CONTROL FOR WIRELESS COMMUNICATIONS - A base station configured for outer loop power control receives an uplink dedicated channel transmission from a wireless transmit/receive unit. The base station transmits transmit power control commands in response to the received uplink channel transmission and determines if the wireless transmit/receive unit is in a discontinuous transmission mode. The base station adjusts a target SIR based on which transmission mode for the wireless transmit/receive unit is detected. The value for the transmit power control command is derived from the adjusted target SIR. | 06-30-2011 |
20110159900 | METHOD AND APPARATUS FOR PROVIDING BIASING CRITERIA FOR BINARY DECISIONS FOR USE IN WIRELESS COMMUNICATIONS TO ENHANCE PROTECTION - A criterion for biasing a binary decision requiring an unequal protection which utilizes a measured signal to interference ratio (SIR). The SIR may be derived from a determination of channel estimation. The SIR is compared against a threshold, the threshold being selected to bias the decision toward a not acknowledge (NACK) as opposed to an acknowledge (ACK) determination. The technique is advantageous for providing biased binary decisions for high speed downlink packets (HSDP) but may be utilized for both uplink and downlink applications. | 06-30-2011 |
20110177834 | COMMUNICATION APPARATUS AND PRECODING METHOD BASED ON MULTIPLE CELLS AND MULTIPLE USERS - Provided are a communication apparatus that may generate a precoding matrix including precoding vectors to cancel or align interference existing in a plurality of terminal devices based on location of the terminal devices, and a terminal device that may estimate a channel formed between the terminal device and the communication apparatus to cancel or align interference signals. | 07-21-2011 |
20110177835 | MULTI-USER COMPRESSION SCHEMES - A method in a communication system, in which multiple transmitters transmit respective messages to a receiver over a communication channel, includes allocating respective resources of the communication channel to the messages so as to cause, for each message, a respective likelihood of interference between the message and at least one other message to depend on a respective impact of the interference on an overall performance measure defined for the communication system. The messages are transmitted from the transmitters over the communication channel using the allocated resources. | 07-21-2011 |
20110183692 | APPARATUS FOR REMOVING INTERFERENCE BETWEEN NEIGHBOR CELLS IN A RADIO COMMUNICATION SYSTEM, AND METHOD FOR SAME - The present invention relates to an apparatus for removing interference between neighbor cells in a radio communication system, and to a method for same. The apparatus according to the present invention includes a receiving unit which receives receiving power information and signal-to-noise ratio information of a neighbor cell base station from multiple receiving antennas, a first determination unit for determining the number of major neighbor cell interference signals by using the received receiving power information and the signal-to-noise ratio information, a second determination unit for determining a candidate signal vector of a target signal in accordance with the determined number of major neighbor cell interference signals, the received signal-to-noise ratio, and the number of the multiple receiving antennas, a third determination unit for determining a candidate signal matrix of the major neighbor cell interference signals on the basis of the determined candidate signal vector of the target signal, and an estimation unit for estimating signals transmitted from the target base station or the neighbor base station by applying the determined candidate signal matrix of the major neighbor cell interference signals to the method of maximum likelihood. Whereby, the present invention removes interference between neighbor cells in an efficient manner, maintains the performance thereof, and reduces complexity at the receiving end. | 07-28-2011 |
20110195730 | MOBILE TELECOMMUNICATIONS NETWORK - In a mobile telecommunications network, a mobile terminal is prevented from communicating at a level that would introduce an unacceptable level of interference at a neighbouring base station by introducing a received signal threshold criteria at its base station that can adapt to the variation in signal levels at its base station and its neighbours. | 08-11-2011 |
20110195731 | METHOD AND APPARATUS FOR UPLINK INTERFERENCE CANCELLATION IN WIRELESS MOBILE COMMUNICATION SYSTEM - An apparatus of a Base Station (BS) and a method for cancelling uplink interference in a wireless mobile communication system are provided. The method includes estimating interference to be exerted by each User Equipment (UE) on a plurality of neighbor cells based on a Rise over Thermal (RoT) level for the plurality of the neighbor cells, determining a transmit power change for each UE based on the estimated interference to be exerted on the neighbor cells, and transmitting the transmit power change for the UE to each UE. The cell coverage is maintained by maintaining the interference exerted on the neighbor cell at a proper level, and the average data rate is enhanced. | 08-11-2011 |
20110201367 | BASE STATION APPARATUS, CONTROL METHOD OF BASE STATION APPARATUS, COMMUNICATION SYSTEM, AND STORAGE MEDIUM STORING PROGRAM - A base station | 08-18-2011 |
20110212739 | Enhanced Estimation of Uplink Interference Coupling - Uplink interference coupling is estimated between a first cell and a second cell by adjusting downlink interference coupling between the cells at least according to user equipment UE transmit power per physical resource block PRB. This estimated uplink interference coupling is used to decide whether to take a component carrier into use in the first cell. In various embodiments: the uplink interference coupling is estimated by adjusting the downlink interference coupling according to transmit power per PRB of a first UE in the first cell and transmit power per PRB of a second UE in the second cell; and by further adjusting the downlink interference coupling according to path losses of the first and second UEs; and the transmit power per PRB as well as the path loss of the second UE is determined from signaling received in the first cell from the second UE operating in the second cell. | 09-01-2011 |
20110212740 | POWER MANAGEMENT AND DISTRIBUTED SCHEDULING FOR UPLINK TRANSMISSIONS IN WIRELESS SYSTEMS - To schedule uplink transmission time slots for a collection of mobile communication devices, a set of base station target interference patterns is associated with base stations. A time slot target interference pattern is assigned for each time slot and it repeats after several time slots. The time slot target interference pattern in a given time slot specifies the interference allowed by each time slot to a given base station by any single mobile. A priority index may be determined for each time slot for each mobile associated with the particular base station. The priority index may be based, in part, on a determined correlation between the time-slot target interference patterns and a potential interference profile of a mobile to which a time slot is to be allocated. A mobile's throughput requirement, the throughput already received over a specified past duration, the system fairness requirement, as well as the amount of data available for transmission are also used for evaluating the priority index. | 09-01-2011 |
20110212741 | Method and Arrangement for Enabling Improved Receiver Quality for Noise Limited Uplink Signals - In a method for enabling improved quality for noise limited uplink signals in a radio base station in a telecommunication system, said radio base station comprising a plurality of transceiver units, each comprising at least one receiver unit, adaptively allocating (S | 09-01-2011 |
20110218000 | MULTI-CELL COMMUNICATION APPARATUS AND METHOD USING RATE-SPLITTING SCHEME AND TRANSMISSION FRAME - Provided is a multi-cell communication system using a rate-splitting scheme and a transmission frame for the multi-cell communication system. The multi-cell communication system may determine whether to perform a rate-splitting based on channel information of a macro base station and a femto base station in a multi-cell environment. The multi-cell communication system may allocate a power or a bandwidth to a message to be transmitted based on the channel information. In the multi-cell environment, a terminal may receive MAP information from a base station and may decode the received MAP information, determining a base station that performs the rate-splitting. | 09-08-2011 |
20110218001 | INTERFERENCE REDUCTION APPARATUS AND INTERFERENCE REDUCTION METHOD THEREOF - The present invention relates to an interference reduction apparatus, an interference reduction method and a computer storage medium. The interference reduction apparatus can estimates the channel of the cells comprehensively to obtain the combination information and the interference power level information. The combination information and the interference power level information is used to combine at least one precoding matrix of he codebook with each other to generate a combined precoding matrix which acts as the strongest signal power from the interference reduction apparatus and the weakest interference from the neighboring cells. | 09-08-2011 |
20110218002 | APPARATUS AND METHOD FOR CONTROLLING UPLINK INTERFERENCE IN A WIRELESS COMMUNICATION SYSTEM - An apparatus and a method for controlling uplink interference in a wireless communication system. The method for controlling the uplink interference includes determining at least one interference signal power threshold determined by at least one neighbor Base Station (BS). The method also includes determining a transmit power offset for at least one serviced Mobile Station (MS) using the at least one interference signal power threshold. The method further includes sending the transmit power offset for the at least one MS to the at least one MS. | 09-08-2011 |
20110223949 | APPARATUS AND METHOD FOR MITIGATING INTER-CELL INTERFERENCE IN MULTIPLE ANTENNA SYSTEM - An apparatus and method for mitigating inter-cell interference in a Multiple Input Multiple Output (MIMO) system are provided. The method includes allocating a serving band for providing service to at least one Mobile Station (MS) through scheduling, receiving at least one request set for at least one neighboring cell, from at least one MS, updating the at least one request set considering a serving band of each MS, and transmitting the updated at least one request set to the at least one neighboring cell. The request set includes at least one piece of information among a band and Precoding Matrix Index (PMI) for making a use restriction request to a neighboring cell that exerts interference on an MS. | 09-15-2011 |
20110223950 | RADIO COMMUNICATION SYSTEM, RADIO TERMINAL, AND COMMUNICATION CONTROL METHOD - A control unit for a wireless terminal includes a power amplification request/modulation method reception unit which receives uplink communication channel power amplification requests transmitted from a wireless base station connected to the wireless terminal, a power reduction request reception unit which receives uplink communication channel power reduction requests transmitted from a wireless base station not connected to the wireless terminal connected, and a modulation class setting unit which, when a power amplification request is received by the power amplification request/modulation method request reception unit and a power reduction request is received by the power reduction request reception unit, sets the modulation class, to a modulation class which has less transmission power than prior to the setting and that has a modulation method for which the communication quality of the aforementioned uplink communication channel is at or above a required level. | 09-15-2011 |
20110244899 | METHODS AND APPARATUS FOR DETERMINING A COMMUNICATIONS MODE AND/OR USING A DETERMINED COMMUNICATIONS MODE - Methods and apparatus for determining a mode of wireless communications to be used by a wireless terminal, e.g., a direct communications mode or an infrastructure communications mode are described. In some embodiments, the mode to be used is determined by a control node based on interference which will be caused to the system taking into consideration at least an area, e.g., cell, in which the wireless terminal seeking to communicate is not located. System interference cost estimates for each mode under consideration are generated and compared. Interference cost estimates may, and do, correspond to different frequency bands when the direct mode uses a different frequency band than the infrastructure communications mode. Separate interference cost estimates and mode determinations are made for different communications directions in some embodiments. The determined mode to be used is communicated to the devices seeking to communicate, e.g., via one or more base stations. | 10-06-2011 |
20110244900 | DATA TRANSMISSION SYSTEM FOR DETERMINING DATA TRANSMISSION POWER USING A VIRTUAL CELL - A data transmission system that determines data transmission power using a virtual cell is provided. A base station may receive transmission data from a plurality of cooperative base stations positioned around the base station, and model terminals receiving an interference signal from the base station and the plurality of cooperative base stations into a virtual cell. The base station may calculate the influence of the interference signal transmitted to the terminal, using the virtual cell, and determine a transmission power for a plurality of frequency bands based on the interference signal. | 10-06-2011 |
20110244901 | SYSTEM, METHOD, AND PROGRAM FOR CORRECTING RADIOWAVE ENVIRONMENT DATA - Radiowave environment data correction that uses the data measurement results obtained at measuring points in a base station peripheral area provided for a wireless communications system, is achieved accurately at a limited number of measuring points. A radiowave environment data correcting system includes correction data determining means that determines correction data for sub-areas, the sub-areas being regions into which an assessment area is divided, on the basis of data measurement results obtained at measuring points belonging to the sub-areas, wherein division into the area is based on an area usage division that is a division predefined according to a particular layout of objects or spaces in the assessment area. The system may also include sub-area dividing means that divides the assessment area into sub-areas in accordance with the area usage division, correction data calculating means that calculates the correction data in the sub-areas using the data measurement results obtained at the measuring points existing in the sub-areas, and radiowave environment data correcting means that uses the calculated correction data to correct radiowave environment data present inside the sub-areas. | 10-06-2011 |
20110250911 | NOISE PADDING TECHNIQUES IN HETEROGENEOUS NETWORKS - A method of wireless communication includes detecting uplink interference in a received uplink transmission of a user equipment. The received uplink transmission is padded with noise based on the detected interference and also based on a frequency domain partition, whether a subframe is protected, and/or a user equipment type. | 10-13-2011 |
20110250912 | METHOD FOR CONTROLLING UPLINK TRANSMISSION POWER IN WIRELESS COMMUNICATION SYSTEM AND AN APPARATUS THEREFOR - A method for setting uplink transmission power at a mobile station in a wireless communication system comprises the steps of: receiving information on the number of total streams received at a base station; and setting the uplink transmission power using the received number of total streams. In this case, the uplink transmission power is preferably a transmission power per stream (P | 10-13-2011 |
20110263281 | POWER CONTROL FOR CLOSED LOOP TRANSMIT DIVERSITY AND MIMO IN UPLINK - A method for dynamically controlling the transmit power of transmission streams transmitted via multiple antennas is disclosed. A transmit power level for multiple streams is determined based on a first reference channel. The difference of signal to interface ratios (SIRs) between two reference channels may represent a power offset. The power offset may be used to determine gain factors used to transmit data channels on the secondary stream with reference to the gain factor of the first reference channel. The power offset may be used to determine other parameters, such a serving grant or transport block sizes of channels carried on the secondary stream. The power offset may allow transmission parameters of channels on the secondary stream to be determined based on the transmit power level of the primary stream and a gain factor for a reference channel transmitted via the primary stream. | 10-27-2011 |
20110287792 | METHOD AND APPARATUS FOR FACILITATING A LAYERED CELL SEARCH FOR LONG TERM EVOLUTION SYSTEMS - A method for ranking signals isolates and cancels neighboring cells using layering. Received signals from various cells are grouped into layers, with each layer comprised of received signals which are comparable within a particular metric (such as signal strength). The signals within a particular layer may also be ranked according to a desired metric. At the beginning of a cancellation cycle the UE may perform the layering and ranking. Once the layering and ranking has been performed the UE may continue to use the layering and ranking for later rounds of cancellation, freeing up processing resources that would otherwise be dedicated to repeated ranking of received signals. After a period of time, the cancellation cycle may repeat and the layering and ranking may be performed again. | 11-24-2011 |
20110294528 | Method And Apparatus For Transient Frequency Distortion Compensation - Transient distortion is compensated for by multiplying an exponentially-decaying phase shift onto the distorted waveform. The exponentially decaying phase shift waveform is patterned after the transient which typically takes the form of an exponential and occurs upon introduction of power to a circuit or circuit component. A digital circuit produces an appropriate exponentially-decaying waveform which is used as the input for a look up table whose output is a complex sinusoidal waveform capable of compensating for the distortion. The complex sinusoid is multiplied onto the transmitted waveform. The decaying exponential is biased so that it crosses a threshold at which point the compensating circuitry is turned off. | 12-01-2011 |
20110306371 | WIRELESS BASE STATION AND WIRELESS COMMUNICATION METHOD - A reception quality information obtaining unit obtains reception quality information indicating reception quality of each of a plurality of antennas at predetermined intervals. A reception quality variation trend recognition unit recognizes a variation trend of a value in relation to reception quality of each of the antennas obtained. A correlation determination unit determines a degree of correlation between the antennas based on the variation trend of the value in relation to the reception quality of each of the antennas recognized. An antenna selection unit selects at least two antennas to be used for wireless communication, based on the degree of correlation between the antennas determined by the correlation determination unit . | 12-15-2011 |
20110312355 | METHOD OF CANCELLING INTERFERENCE IN SOUNDING REFERENCE SIGNALS - The present invention provides a method of interference cancellation. Embodiments of the method may include removing one or more first reference signals from a signal received by a first base station to form a modified signal. The signal includes a superposition first reference signal(s) transmitted by first user equipment served by the first base station and one or more second reference signals transmitted by second user equipment served by a second base station. The method may also include extracting the second reference signal(s) from the modified signal and determining a timing delay between the second user equipment and the first base station using the extracted second reference signal(s). | 12-22-2011 |
20110312356 | METHOD, APPARATUS AND SYSTEM FOR ESTIMATING CHANNELS - A method, an apparatus and a system for estimating channels are disclosed. A method for estimating channels includes: receiving downlink signals inclusive of reference signals from two or more Access Points (APs), where the relative frequency shift between reference signals sent by different APs is zero; and performing channel estimation according to the reference signals. Another method for estimating channels includes: receiving downlink signals inclusive of reference signals from two or more APs, where for a first AP and a second AP among the two or more APs, a specific time-frequency lattice in the downlink signals sent by the first AP does not include data signal, and the specific time-frequency lattice corresponds to a time-frequency lattice utilized by the second AP to send a reference signal; and performing channel estimation according to the reference signals. The technical solution disclosed herein eliminates the interference between the reference signal and the data signal, enables the UE to estimate the channel value between the UE and the cooperative APs accurately, and improves the UE performance. | 12-22-2011 |
20120015678 | METHODS AND APPARATUS OF TRANSMISSION POWER CONTROL IN THE PRESENCE OF INTERFERENCE - A method of operating a wireless device is provided in which an interference level on a resource is determined. In addition, a signal is transmitted on the resource with a first power when the interference level is low. The first power is such that the signal is received with a first SNR. Furthermore, the signal is transmitted on the resource with a second power when the interference level is high. The second power is such that the signal is received with a second SNR less than the first SNR. | 01-19-2012 |
20120021787 | COMMUNICATION METHOD SUPERVISED BY AN INTERFERENCE CLASSIFICATION - The present invention relates to a communication method supervised by an interference classification. For two couples of transmitting and receiving terminals having communications using the same radio resources and interfering with each other, a partition of the interference diagram into a plurality of distinct zones is determined, each zone corresponding to a particular processing. For an operating point of the transmitting and receiving terminals, the zone in which this point is located is determined, and the processing associated with that zone is performed in at least one of the receiving terminals. | 01-26-2012 |
20120021788 | METHOD AND APPARATUS FOR HANDOVER OF DEVICE TO MITIGATE UPLINK INTERFERENCE IN FEMTOCELL DEPLOYMENTS - Methods and apparatuses are provided for determining whether to handover a device to mitigate uplink interference while achieving acceptable uplink service quality in a wireless network. One or more parameters related to a device can be evaluated to determine whether to handover the device, such as a number of transmission power reports received from the device over a period of time, a frame error rate, setpoint, or power control commands related to the uplink of the device, a received pilot signal strength at the device, an uplink throughput or buffer size at the device, etc., from which transmit power information of the device can be inferred for determining whether the device potentially interferes with access points or devices. Based on the one or more parameters, an access point can determine whether handing over the device may mitigate such uplink interference while ensuring uplink service quality, and accordingly handover the device. | 01-26-2012 |
20120028663 | INTERFERENCE IDENTIFICATION AND MITIGATION IN WIRELESS COMMUNICATION - Interference in a wireless communication system receiver, such as at a base station, is identified based on monitoring automatic gain control (AGC) events. AGC statistics in combination with base band processing are used to identify the interference. Performance degradation is evaluated, and interference mitigation solutions are proposed based on the identified interference. Mitigation solutions include IRC, scheduling restrictions, and filter modifications including replacement of filters. | 02-02-2012 |
20120028664 | System and Method for Automatic Fractional Frequency Reuse Planning - A system and method for automatic fractional frequency reuse (FFR) planning are provided. A method for controller operations includes determining a group of frequency reuse modes, assigning at least one frequency reuse mode to a controller based on mutual relationship information, where the at least one frequency reuse mode is from the group of frequency reuse modes, and sharing the at least one frequency reuse mode with communications controllers coupled to the controller. | 02-02-2012 |
20120028665 | METHOD FOR SELECTING AN ADAPTIVE COMP SCHEME - Disclosed is a method for selecting an adaptive CoMP scheme for a user equipment. The user equipment selects a first CoMP set which can maximize a signal to interference-plus-noise ratio (SINR) from among CoMP sets while performing a first coordinate multi-point (CoMP) scheme. Then, the user equipment compares the current data transmission rate thereof and the required minimum data transmission rate thereof and the required minimum data transmission rate while performing the first CoMP scheme and selecting the first CoMP set. Subsequently, the user equipment which performs the first CoMP scheme selects a second CoMP scheme on the basis of the result of the comparison in accordance with a predetermined sequence of CoMP schemes. | 02-02-2012 |
20120028666 | PRE-PROCESSING METHOD, SYSTEM, AND APPARATUS FOR COOPERATIVE COMMUNICATION - A pre-processing method and system for cooperative communication are provided. The method includes: after obtaining channel matrices collected by a Base Station (BS), obtaining Multiple-Input Multiple-Output (MIMO) Cooperation Area (CA) information, in which the MIMO CA information includes cooperation information between BSs, and the cooperation information between the BSs is used to determine an interference relation between MIMO CAs; combining the channel matrices of a User Equipment (UE) according to the interference relation between the MIMO CAs; and performing pre-coding computation of the UE by using the combined channel matrices. | 02-02-2012 |
20120040701 | APPARATUS AND METHOD FOR REDUCING INTERFERENCES BETWEEN BASE STATIONS IN WIRELESS COMMUNICATION SYSTEM - A method for reducing interferences between base stations in a communication system having a plurality of base stations. This method comprises the steps of: causing a user station to receive both a signal transmitted by a local-cell base station and a signal transmitted by an adjacent-cell base station, thereby measuring the SNR of the interfered link and the SNR of the leak link of the adjacent-cell base station; calculating a weighting factor of a leak power based on the measured SNR of the interfered link and the measured SNR of the leak link of the adjacent-cell base station; and determining, based on the calculated weighting factor, whether or not the leak power has to be suppressed and to what degree such suppression has to be performed. | 02-16-2012 |
20120040702 | METHOD AND APPARATUS FOR SELECTING OBJECT TERMINAL IN A MULTI-BS MIMO SYSTEM - According to an embodiment of the present invention, on a radio resource block for Multi-BS MIMO, one of the coordinating base stations selects a mobile terminal at first, and informs the other base stations of the characterization information and the pre-coding information etc. of the selected mobile terminal, and the selection made by the other base stations will obey the selection result of the base station that selects at first. By applying the method and apparatus provided by the present invention, the joint selection of object terminals in the Multi-BS MIMO is realized, and such selection is distributed without any central scheduling device which is necessary in the central scheduling scheme. In addition, only very limited information exchange among the coordinating base stations is required to realize the present invention. According to an embodiment of the present invention, the object terminals selected by the coordinating base stations are matched well with each other such that the total performance of the system is improved; according to an embodiment of the present invention, the fairness among the base stations can be well satisfied. | 02-16-2012 |
20120046055 | ACCESS POINT POWER CONTROL - There is described a method of controlling a basestation in a cellular wireless communications network, the method comprising, within the basestation, autonomously and dynamically adapting a maximum value for a total transmit power of the basestation, such that interference between the basestation and other access points in the vicinity is minimized. | 02-23-2012 |
20120058788 | METHOD AND APPARATUS FOR COMMUNICATING WITH BLIND INTERFERENCE ALIGNMENT USING POWER ALLOCATION AND/OR TRANSMISSION ARCHITECTURE - A method and system are disclosed herein for power allocation and/or clustering in a wireless communication system that uses blind interference alignment. In one embodiment, the system comprises a plurality of receivers, where each receiver in the plurality has a multi-mode antenna with a single radio frequency (RF) chain that is operable in a plurality of antenna modes, and wherein each receiver shifts between the plurality of antenna modes in a predetermined manner. The system also includes a plurality of base stations to perform cluster-based transmission, each base station in the plurality of base stations having one or more transmitters having a transmit antenna and being operable to communicate with one or more of receivers in the plurality of receivers using a blind interference alignment (BIA) scheme, and wherein the plurality of base stations are grouped in different clusters at different times according to cluster patterns. | 03-08-2012 |
20120058789 | PROBABILISTIC INTERFERENCE MITIGATION FOR WIRELESS CELLULAR NETWORKS - An interference mitigation system randomizes transmissions to cell-edge users by carefully controlling the probability of transmission to these users, thereby creating a virtual fractional frequency system that does not require extensive frequency management and coordination across the network. In some embodiments, the interference mitigation system identifies severely interfered links and reduces the probability of transmission on these links, with the result being a reduced probability of interference. | 03-08-2012 |
20120064927 | BASE STATION AND USER EQUIPMENT FOR PERFORMING CoMP TRANSMISSION AND METHOD THEREOF - A base station, a user equipment, and a method for operating a cooperative multipoint (CoMP) transmitter and receiver (Tx/Rx) are disclosed. The operating method includes receiving, from a peripheral cell, precoding matrix index (PMI) information to be used by a user equipment of the peripheral cell, and transmitting the received PMI information to target user equipments allocated with an entire frequency range, among a plurality of user equipments present in a current cell. | 03-15-2012 |
20120064928 | SPECTRUM-ADAPTIVE NETWORKING - The present invention increases the available spectrum in a wireless network by sharing existing allocated (and in-use) portions of the RF spectrum in a manner that will minimize the probability of interfering with existing legacy users. The invention provides interference temperature-adaptive waveforms, and a variety of physical and media access control protocols for generating waveforms based on measurement and characterization of the local spectrum. The invention measures the local spectrum at a receiving node, generates an optimal waveform profile specifying transmission parameters that will water-fill unused spectrum up to an interference limit without causing harmful interference to primary and legacy transmitters using the same frequency bands, and enables simultaneous transmit and receive modes at a multiplicity of transceivers in a wireless network. The invention also provides closed loop feedback control between nodes, co-site interference management, intersymbol interference mitigation, wide sense stationary baseband signaling and modulation, and power limited signaling for avoiding detection and interception. | 03-15-2012 |
20120071182 | INTER-CELL INTERFERENCE MITIGATING METHOD IN WIRELESS COMMUNICATION SYSTEM AND APPARATUS THEREFOR - Disclosed is a method for a serving base station in a wireless communication system to mitigate inter-cell interference. More specifically, the method comprises the steps of: allocating a first resource for a terminal existing in a first region in which the coverage of the serving base station and the coverage of a neighboring base station are overlapped with each other; and allocating a second resource with the first resource for a terminal existing in a second region of the coverage of the serving base station, which is outside of the coverage of the neighboring base station. Desirably, the first resource is for the serving base station only with reuse factor of ½, and the second resource is shared with the neighboring base station with reuse factor of 1. | 03-22-2012 |
20120077530 | WIRELESS COMMUNICATION DEVICE AND METHOD FOR CONTROLLING BEAM TO BE TRANSMITTED - A controller controls the direction of a beam to be transmitted toward a correspondent wireless communication device to transmit a first wireless signal to the correspondent wireless communication device, and controls the direction of the beam within a predetermined shift from the direction of the first wireless signal, thereby transmitting a second wireless signal at a first timing before or a second timing after the timing of the control for the first wireless signal. | 03-29-2012 |
20120083299 | Model Based Doppler Compensation Using Traffic Data - Implementations and techniques for model based Doppler compensation using traffic data are generally disclosed. | 04-05-2012 |
20120083300 | QUALITY OF SERVICE-CONSTRAINT CENTRALISED POWER ALLOCATION METHOD - The present invention relates to a centralised power allocation method in a wireless telecommunication system comprising at least a first couple of terminals, consisting of a first transmitting terminal and a first receiving terminal, and a second couple of terminals, consisting of a second transmitting terminal and a second receiving terminal. A control node partitions the interference diagram between the communication of the first couple and the communication of the second couple, into different areas, each area being associated to a type of processing of the interference. The control node calculates the minimum power curve for each communication in each said area. The power values to be allocated are given by the coordinates of the point of intersection of both curves in said diagram. | 04-05-2012 |
20120083301 | APPARATUS AND METHOD FOR COMMUNICATING IN A NETWORK IN WHICH INTERFERENCE EXISTS BETWEEN WIRELESS COMMUNICATION SYSTEMS - An apparatus and method are provided for communicating in a network in which interference exists between wireless communication systems. The apparatus includes multiple transceivers for individually communicating with base stations of the multiple wireless communication systems; and a controller for negotiating with at least one of the base stations, setting a non-communication period with a negotiated base station, and communicating with the negotiated base station during the non-communication period, based on whether an interference level between wireless signals communicated through the multiple transceivers falls within a predetermined range. | 04-05-2012 |
20120083302 | METHOD AND APPARATUS FOR FAST OTHER SECTOR INTERFERENCE (OSI) ADJUSTMENT - Systems and methods that facilitate management of interference and communication resources are provided. A differential approach is devised in which other-sector interference (OSI) and communication resources are managed by adjusting an offset (delta) value associated with the resources in response to receiving an indication of other-sector interference. An OSI indication can be issued based on a short and a long time scale, and effective interference metrics over time-frequency resources. The adjusted delta value is communicated to a serving access point, which reassigns communication resources in order to mitigate other-sector interference. | 04-05-2012 |
20120094702 | RADIO COMMUNICATION SYSTEM, RADIO COMMUNICATION METHOD AND BASE STATION - When DFFR is performed in a heterogeneous environment in which a pico base station coexists in the area of a macro base station and when the pico base station judges that, based on the received-signal quality report result from a mobile terminal, the macro base station causes interference to the pico base station, the pico base station reports an interference power threshold to be notified to the macro base station based on the transmission power setting value of the macro base station, the transmission power setting value of the pico base station, and the estimated interference amount calculated from the scan report result. The macro base station transmits a result of comparison between the transmission powers of multiple frequency resources and the interference power threshold, to the pico base station and the pico base station selects a frequency resource, unlikely to be affected by interference. | 04-19-2012 |
20120100877 | SYSTEMS AND METHOD FOR COORDINATED MULTIPOINT DOWNLINK TRANSMISSIONS - A method for determining antenna weights for use in transmitting data from a plurality of base stations to a user device is disclosed. The antenna weights are determined using an input covariance matrix (S), and the input covariance matrix is determined subject to a predetermined power constraint and a predetermined, non-zero interference constraint. | 04-26-2012 |
20120108276 | COOPERATIVE SPECTRUM SENSING IN COGNITIVE RADIO NETWORKS - Providing for cooperative sensing in wireless communications that improves user terminal throughput and minimizes interference is described herein. According to some aspects, a network entity, such as a base station, can assign a set of SUTs to measure a subset of wireless channels in a target frequency according to a cooperative sensing arrangement. In particular aspects, this assignment can be implemented so as to increase or maximize potential traffic throughput of those SUTs within the target frequency, in a given wireless time slot. In this manner, cooperative sensing can be structured so as to provide more efficient traffic communications within the target frequency. | 05-03-2012 |
20120108277 | Design and Method to Enable Single Radio Handover - A mobile device comprising a transmitter and a receiver used to wirelessly communicate with at least one network, wherein the mobile device is configured to wirelessly communicate with a first network and a second network, wherein the mobile device is configured to communicate with the second network during a handover procedure from the first network to the second network without disconnecting a link with the first network, and wherein the mobile device is configured to communicate with the second network during communication gaps between the mobile device and the first network during the handover procedure. | 05-03-2012 |
20120108278 | METHOD FOR REDUCING INTER-CELL INTERFERENCE - A method for reducing inter-cell interference and a method for transmitting a signal by a collaborative MIMO scheme, in a communication system having a multi-cell environment are disclosed. An example of a method for transmitting, by a mobile station, precoding information in a collaborative MIMO communication system includes determining a precoding matrix set including precoding matrices of one more base stations including a serving base station, based on signal strength of the serving base station, and transmitting information about the precoding matrix set to the serving base station. A mobile station in an edge of a cell performs a collaborative MIMO mode or inter-cell interference mitigation mode using the information about the precoding matrix set collaboratively with neighboring base stations. | 05-03-2012 |
20120115520 | Selective Interference Rejection Combining - It is provided a method, including deciding, based on a previously estimated interference value, whether a user equipment or a sounding reference signal or a channel of a received uplink signal is affected by a colored interference more than a first predefined threshold, wherein colored interference is an interference having a spatial and/or spectral predominance; and suppressing interference rejection combining on the uplink signal if none of the user equipment, the sounding reference signal, and the channel of the received uplink signal is affected more than the first predefined threshold. | 05-10-2012 |
20120115521 | METHOD AND SYSTEM FOR SETTING REFERENCE SIGNAL IN WIRELESS COMMUNICATION SYSTEM - A method and a system of setting up a reference signal in a radio communication system. The radio communication system includes a serving cell and a neighboring cell, and a mobile terminal of the serving cell uses the same temporal frequency resource so as to receive a serving resource block from the serving cell and receive an interference resource block from the neighboring cell. The method according to the present disclosure includes a step of setting up a user-specific reference signal in the interference resource block and a step in which puncturing is performed at same temporal frequency position as the temporal frequency position at which the user-specific reference signal is set up on the interference resource block of the serving resource block so as to prevent any signal from being transmitted at the punctured temporal frequency position. When the method and the system provided in the present disclosure are used and the interference power between cells is thereby measured, it is possible to effectively reduce feedback overhead in a coordinated beamforming. | 05-10-2012 |
20120115522 | RESOURCE CONTROL IN A COMMUNICATION SYSTEM - Methods, devices, and computer program products facilitate resource allocation to entities within a wireless communication network. Interference values are determined in the presence of entities that may or may not be controlled by the wireless communication network. Based on the determined interference values and associated statistics, throughputs associated with the user equipment within the wireless communication network are modified. These modifications enable an increase or decrease in the throughput of the user equipment, which optimizes the aggregate throughput of the wireless communication network while maintaining the interference levels within target levels. | 05-10-2012 |
20120122502 | METHOD AND APPARATUS OF CONTROLLING INTER CELL INTERFERENCE BASED ON COOPERATION OF INTRA CELL TERMINALS - Provided is a method and apparatus for controlling inter cell interference based on cooperation between intra cell terminals. The intra cell terminals may exchange interference channel information, and may determine a receive beamforming vector based on the exchanged interference channel information. At least one intra cell terminal may feed back, to a neighboring cell base station, information associated with an effective interference channel using the receive beamforming vector. A base station may determine a transmit beamforming vector based on information associated with an effective interference channel using receive beamforming vectors of neighboring cell terminals that are received from at least one neighboring cell terminal. | 05-17-2012 |
20120122503 | System and Method for Self-Optimized Inter-Cell Interference Coordination - An embodiment method for operating a controller of a communications system includes determining inter-cell interference coordination (ICIC) information for the communications system, automatically adjusting, by the controller without end-user input, ICIC parameters according to the ICIC information to improve an overall performance level of the communications system, and transmitting the ICIC operation parameters to network entities in the communications system. | 05-17-2012 |
20120122504 | ANTI-INTERFERENCE METHOD AND DEVICE IN COMMON-FREQUENCY NETWORKING MOBILE COMMUNICATION SYSTEM - The examples of the present invention disclose an anti-interference method and device in a common-frequency networking mobile communication system. The method includes: creating a candidate cell list according to probability that each adjacent cell of a current cell interferes with the current cell; selecting a selected cell list from the candidate cell list according to the probability; performing channel estimation for adjacent cells in the selected cell list, obtaining current signal power of each adjacent cell in the selected cell list according to a channel estimation result, and selecting a detected cell list from the selected cell list according to the signal power; and performing joint detection for adjacent cells in the detected cell list to eliminate interference of the adjacent cells in the detected cell list on the current cell. | 05-17-2012 |
20120129558 | Method and device for reducing mutual interference for multi-carrier - A method for reducing mutual interference of multi-carrier includes: adjusting the phase of at least one modulated signal; modulating all baseband signals onto respective modulated signals; judging whether all baseband signals can be demodulated correctly, and adjusting the phase of at least one modulated signal when there is any modulated signal which cannot be demodulated correctly, until all the baseband signals can be demodulated correctly; and accepting the current phase value as the phase value of the modulated signal of each baseband signal when all can be demodulated correctly. The present disclosure also discloses a device for reducing mutual interference of multi-carrier. The present disclosure can improve performance obviously under the circumstance of arranging the multi-carrier adjacent to each other, and make multiple carriers operate simultaneously in the same radio signal coverage area, therefore the frequency spectrum utilization ratio is greatly improved. | 05-24-2012 |
20120135763 | DYNAMIC INTERFERENCE MITIGATION FOR CELLULAR NETWORKS - A method for a wireless communication network is presented. In one embodiment, the method includes receiving, by a base station, information about one or more interfering base stations with respect to a communication channel used by a mobile station. The method includes sending silence requests to an interfering base station to reduce interference from that interfering base station with respect to the communication channel. The method further includes establishing communication with the mobile station via the communication channel. | 05-31-2012 |
20120135764 | REFERENCE SIGNAL COLLISION DETECTION - A base station outputs first detection information representing a code of a reference signal and representing a mobile device that is determined, on the basis of transition of a status at the time of occurrence of disconnection of the radio link between the mobile device and the base station, to be capable of causing the collision, and second detection information representing a code of a reference signal and representing a mobile device that is determined, on the basis of occurrence of failure of reconnection of the radio link between the mobile device and the base station, to be capable of causing the collision. A collision detection device estimates that, when the code and the mobile device of the first detection information coincide with the code and the mobile device of the second detection information, the collision of the reference signal will be caused. | 05-31-2012 |
20120149410 | METHOD AND SYSTEM FOR POWER ALLOCATION IN A TRANSMISSION SYSTEM - In accordance with embodiments of the present disclosure, a method and system for allocating power in a transmission system may be provided. A method may include determining a channel quality for each of a plurality of subcarriers, wherein the channel quality for each individual subcarrier is equal to the signal-to-interference and noise ratio for the individual subcarrier divided by the power allocated to the subcarrier. The method may also include allocating power to a subset of the plurality of subcarriers, wherein each individual subcarrier of the subset has a channel quality greater then each individual subcarrier not of the subset. The method may further include transmitting a signal on each of the individual subcarriers of the subset. | 06-14-2012 |
20120149411 | DISTRIBUTED ANTENNA SYSTEM, BASE STATION DEVICE, AND ANTENNA SELECTION CONTROL METHOD - An optimum communication mode and an optimum antenna are selected according to traffic and a radio propagation status of a terminal. With the use of traffic information between a base station and the terminal, an SISO communication or an SIMO communication is conducted if the traffic is small. It is determined whether the MIMO communication should be conducted, or not, if the traffic is large. An antenna that can exert the effect as the MIMO communication is selected by using the radio propagation channel state information between the distributed antennas of the base station and the antenna of the terminal. Also, because the selection of the antenna is changed by conducting the MIMO communication, an antenna optimum for the terminal that conducts the SISO communication or the SIMO communication is re-selected taking the interference influence on the terminal that conducts the SISO communication or the SIMO communication into account. | 06-14-2012 |
20120149412 | System and Method for Interference Control in Simultaneous Transmission Systems - A wireless apparatus comprising a first and second transmitter, a first and second receiver, and a control unit configured to monitor the first and second receivers and the first and second transmitters for dynamically determined information, wherein the control unit is further configured to select/reselect system, handover and adjust a constraint on a maximum allowable power level for each of the first and the second transmitters based at least in part on the dynamically determined information and at least in part on static information to control interference generation. | 06-14-2012 |
20120149413 | Reducing Interference from Dominant Interfering Neighboring Base Stations - An apparatus including a monitor configured to determine at least one dominant interfering neighbouring base station dependent on an associated at least one neighbouring base station interference parameter value and generator configured to generate at least one interference reduction request for the at least one dominant interfering neighbouring base station. | 06-14-2012 |
20120157138 | RADIO COMMUNICATION SYSTEM, RADIO TERMINAL, RADIO BASE STATION, CONTROLLER DEVICE AND RADIO COMMUNICATION METHOD - A controller device receives power information and location information from a first radio base station, the power information indicating, for each frequency, the power of the signal arriving at a radio terminal in the communication area of the first radio base station from a second radio base station, and the location information indicating the location of the radio terminal. The controller device is provided with an identifying unit which, based on the power information and location information received from the first radio base station, identifies an interference location and identifies an interference frequency, the interference location being the location where the power of the signal arriving at the communication area is greater than or equal to a predetermined value, and the interference frequency being the frequency of the signal arriving at the interference location. | 06-21-2012 |
20120157139 | COMMUNICATION METHOD OF NEIGHBORING TERMINAL AND TARGET TERMINAL - Provided is a communication method of a neighboring terminal and a target terminal in which a cooperative terminal that has a better SINR or a better channel condition provides help to a target terminal through cooperation between terminals based on a random access mode or a scheduling mode, so that an SINR of the target terminal is improved without help from a base station. | 06-21-2012 |
20120157140 | APPARATUS AND METHOD OF MULTI CELL COOPERATION IN WIRELESS COMMUNICATION SYSTEM - An apparatus and method of multi cell cooperation is provided. The user equipment receives transmission beam forming information from a first cooperative cell, generates serving cell feedback information and cooperative cell feedback information on the basis of the transmission beam forming information, transmits the serving cell feedback information to a serving cell, and transmits the cooperative cell feedback information to a second cooperative cell. | 06-21-2012 |
20120165053 | METHOD AND APPARATUS FOR TRANSCEIVING A SIGNAL IN A COMMUNICATION SYSTEM - The present invention relates to a method for measuring the position of user equipment through a reference signal, or pilot, in an orthogonal frequency division multiplexing-based wireless mobile communication system. The present invention relates to a method for transmitting a cell-specific positioning reference signal (PRS) pattern which is a signal pattern used in transceiving between the user equipment and a base station. | 06-28-2012 |
20120165054 | INTEGRATED CIRCUIT FOR CONTROLLING SEQUENCE ASSIGNING METHOD AND REFERENCE SIGNAL GENERATING METHOD - Provided is a sequence allocation method capable of reducing inter-cell interference of a reference signal when a ZC sequence is used as the reference signal in a mobile communication system. In the sequence allocation method divides R×M sequences specified by a ZC sequence number r (r=1 to R) and a cyclic shift sequence number m (m=1 to M) into a plurality of sequence groups X (X=1 to R) in accordance with the transmission band width of the reference signal, so that the ZC sequence is allocated to each cell in each sequence group unit. When it is assumed that R=9 and M=6, the number of sequence is 54. Each of the sequence groups is formed by two sequences. Accordingly, the number of sequence groups is 27. The 27 types of sequence groups are allocated to each cell. | 06-28-2012 |
20120172074 | Method of controlling noise rise in a cell - After a maximum noise rise for a cell is set, a maximum noise rise for each mobile station is allocated within the cell. The actual noise rise from each mobile station within the cell is measured at a base station and signaled to a network. When the cell uses enhanced dedicated channel (E-DCH), the contribution to noise rise of E-DCH signaling is determined and received signal code power (RSCP) at the base station is measured. The RSCP measurement is decoded to determine contributions from mobile stations within and outside the cell; contributions from mobile stations within the cell are calculated; and the network is notified of the measured noise rise. In addition a compensation value may be applied to compensate for temperature induced noise. | 07-05-2012 |
20120172075 | WIRELESS COMMUNICATION SYSTEM BETWEEN MEDICAL DEVICES USING COGNITIVE TECHNOLOGY - Provided is a wireless communication system between medical devices. A wireless communication apparatus between medical devices using a cognitive technology may receive, from an external frequency coordination database server, state information of frequencies that are available in a predetermined area, and store interference information associated with the frequencies. The communication apparatus may sense an external interference signal that affects the frequencies outside the predetermined area, and an internal interference signal that affects the frequencies within the predetermined area. The communication apparatus may determine a priority of each of the frequencies that are available in the predetermined area based on the interference information, the external interference signal, and the internal interference signal, and may determine a frequency to be assigned based on the priority. | 07-05-2012 |
20120178482 | METHOD AND APPARATUS FOR REDUCING INTER-CELL INTERFERENCE IN A WIRELESS COMMUNICATION SYSTEM - The present invention relates to a method including aligning a boundary of a downlink subframe from the first base station to a first user equipment with a boundary of a downlink subframe from a second base station to a second user equipment; acquiring timing advance information indicating a time by which a boundary of an uplink subframe from the first user equipment to the first base station advances compared to the aligned boundary of the downlink subframe; and notifying the first user equipment of a time point at which an uplink subframe is transmitted from the first user equipment to the first base station based on the acquired timing advance information, wherein the boundary of the uplink subframe from the notified first user equipment to the first base station is aligned with a boundary of an uplink subframe from the second user equipment to the second base station. | 07-12-2012 |
20120184310 | Communications Systems - A method of controlling spectrum use in a first wireless communications system, the first wireless communications system being operable to take part in a spectrum assignment process involving at least the first wireless communications system and one or more other wireless communications systems, the method comprising in a single instance of the spectrum assignment process, exchanging a first portion of spectrum for a second, different portion of spectrum, by assigning the first portion of spectrum from the first wireless communications system to the one or more other wireless communications systems and accepting the assignment of the second portion of spectrum from the one or more other wireless communications systems to the first wireless communications system. | 07-19-2012 |
20120190391 | PHYSICAL LAYER SIGNALING TO USER EQUIPMENT IN A WIRELESS COMMUNICATION SYSTEM - A method of wireless communication includes receiving physical layer signaling from a serving eNodeB in a wireless network. Interference estimation, interference cancellation and/or spatial equalization of user equipment is controlled in accordance with the received signaling. | 07-26-2012 |
20120190392 | MOBILE COMMUNICATION SYSTEM, BASE STATION, NETWORK DEVICE, AND CONTROL METHOD AND PROGRAM THEREOF - In order to reduce interference to a macro user equipment by easily selecting a home cell serving as the source of interference to the macro user equipment and adjusting a transmission power or the like, a plurality of base stations ( | 07-26-2012 |
20120196634 | WIRELESS COMMUNICATION SYSTEM, MOBILE TERMINAL AND COLLABORATIVE COMMUNICATION METHOD - A first base station receives from a mobile terminal identification information indicating a combination of a weight coefficient for the first base station and a weight coefficient for a second base station, transfers the received identification information to the second base station, and performs precoding of a data signal to be transmitted to the mobile terminal by collaborative transmission, by using the weight coefficient for the first base station identified by means of latest identification information. The second base station receives the identification information from the first base station, and performs precoding of a data signal to be transmitted by collaborative transmission, by using the weight coefficient for the second base station identified by means of identification information obtained as latest identification information and different from that for the weight coefficient for the first base station used for precoding of the data signal. | 08-02-2012 |
20120202540 | METHOD AND APPARATUS FOR CONTROLLING NEIGHBOR CELL INTERFERENCE - A method for managing neighbor cell interference comprises: a step of measuring inter-cell interference control information by subframe units; and a step of transmitting the inter-cell interference control information measured by subframe units, to at least one neighbor cell for each of the subframes. The interference management method of the present invention dynamically performs neighbor cell interference management under the condition where neighbor cell interference changes in terms of time, thus improving performance of a system. Further, the interference management method of the present invention maps a wireless resource property pattern to a cell ID. Consequently, the system adopting the method of the present invention exhibits excellent performance in any environment. | 08-09-2012 |
20120202541 | METHOD FOR TRANSMITTING FEEDBACK INFORMATION IN CoMP, TERMINAL FOR PERFORMING SAME, METHOD FOR GENERATING CHANNEL STATE INFORMATION AND BASE STATION APPARATUS FOR PERFORMING SAME - Disclosed are a method for estimating a channel state in a CoMP operation of a terminal and a method for generating channel state information of a base station. A terminal can measure strength or an interference level of a signal of each cell using a reference signal received from each cell for performing the CoMP operation. In addition, the terminal can measure the sum of the interference levels of the cells which do not perform the CoMP operation using a region from which a reference signal of a serving cell of each cell is transmitted. In addition, the terminal can transmit to the serving base station the strength of the interference level of the signal of each cell for performing the measured CoMP operation and the sum of the interference levels of the cells which do not perform the CoMP operation. | 08-09-2012 |
20120208578 | METHOD AND APPARATUS FOR UPLINK POWER CONTROL IN WIRELESS COMMUNICATION SYSTEM - A method and an apparatus for uplink power control in a wireless communication system are provided. More specially, a method is provided in which a first base station in a wireless communication system periodically measures interference for a cell of a second base station neighboring the first base station, determines an average of the periodically measured interference, broadcasts the determined average of the periodically measured interference to mobile terminals located in a cell of the first base station, determines a weight for the determined average of the periodically measured interference, based on one of resource allocation information for the cell of the second base station and whether a specific message for interference regulation is received from the second base station, and transmits the determined weight to the mobile terminals. | 08-16-2012 |
20120214523 | POWER MANAGEMENT AND DISTRIBUTED SCHEDULING FOR UPLINK TRANSMISSIONS IN WIRELESS SYSTEMS - To schedule uplink transmission time slots for a collection of mobile communication devices, a set of base station target interference patterns is associated with base stations. A time slot target interference pattern is assigned for each time slot and it repeats after several time slots. The time slot target interference pattern in a given time slot specifies the interference allowed by each time slot to a given base station by any single mobile. A priority index may be determined for each time slot for each mobile associated with the particular base station. The priority index may be based, in part, on a determined correlation between the time-slot target interference patterns and a potential interference profile of a mobile to which a time slot is to be allocated. | 08-23-2012 |
20120220324 | Method and Apparaatus for Intercell Uplink Interference Control - Wireless user equipment (UE) operating in a wireless communication system may operate in a state, for example, the CELL_FACH state in UMTS, that does not allow for soft handoff from one cell to another. This inability to engage in soft handover may lead to intercell interference at a non-serving cell when the UE transmits on its uplink in close proximity to the non-serving cell. Therefore, provided in the present disclosure is method of wireless communication, which includes receiving a neighbor cell identification set indicating one or more neighbor cells, receiving a relative grant channel resource index corresponding to a relative grant channel shared by at least one of the one or more neighbor cells, detecting intercell interference associated with a user equipment (UE) in the one or more neighbor cells, and transmitting a non-serving relative grant message to the UE on the relative grant channel. | 08-30-2012 |
20120225680 | INTERFERENCE COORDINATING METHOD AND CLUSTER, AND METHOD FOR REGISTERING NEW CLUSTER IN HETEROGENEOUS NETWORK - The present invention relates to a heterogeneous network in which a variety of types of micro or local base stations coexist along with a macro base station. | 09-06-2012 |
20120238302 | INTERFERENCE CONTROL - Controlling interference towards a first access node from uplink transmissions made by a user device to a second access node, wherein said controlling is carried out on the basis of an indication of the pathloss between said first and second access nodes without using any measurement of pathloss between said user device and said first access node. | 09-20-2012 |
20120244897 | INTERFERENCE ELIMINATION METHOD AND APPARATUS FOR MULTI-ANTENNA SYSTEM - Embodiments of the present invention disclose an interference elimination method and apparatus for a multi-antenna system. The method includes: generating an equalization coefficient according to a baseband signal received on a receiving antenna, a channel estimation matrix, and an obtained cross-correlation matrix of transmitted signals of a downlink channel on multiple transmit antennas; and performing interference elimination processing on the baseband signal according to the equalization coefficient. | 09-27-2012 |
20120252510 | METHODS AND APPARATUS FOR ASSIGNING RESOURCES TO SCHEDULE PEER-TO-PEER COMMUNICATIONS IN WWAN - A method of operating a wireless device includes determining an energy on each of a plurality of resources for broadcasting CIDs, sending information to a base station based on the determined energy for each of the CIDs, and receiving a CID from the base station. The received CID is one of the CIDs determined based on the information. A method of wireless communication includes receiving first information about a first plurality of CIDs from a first wireless device, receiving second information about a second plurality of CIDs from a second wireless device, comparing the first information and the second information to determine a subset of CIDs based on the first plurality of CIDs and the second plurality of CIDs, selecting a CID based on the subset of CIDs, and sending the selected CID to at least one of the first wireless device or the second wireless device. | 10-04-2012 |
20120252511 | RECEIVER WITH HYBRID RECEPTION ESTIMATION AND METHODS FOR USE THEREWITH - A receiver includes an antenna array that generates received signals from a first remote transmitter and a second remote transmitter, the antenna array having a beam pattern that is controllable based a control signal. A plurality of receiver sections process the received signals to generate down-converted signals. A receiver processing module, generates the control signal to control the beam pattern to a first pattern during a first time period for reception from the first remote transmitter, generates a first reception estimate based on the down-converted signals during the first time period, generates the control signal to control the beam pattern to a second pattern during a second time period for reception from the second remote transmitter, generates a second reception estimate based on the down-converted signals during the second time period, and generates inbound data based on the first reception estimate and the second reception estimate. | 10-04-2012 |
20120258746 | METHOD AND APPARATUS FOR ADJUSTING RISE-OVER-THERMAL THRESHOLD - Methods and apparatuses are provided that include adaptively configuring a rise-over-thermal (RoT) threshold at a base station to improve communications with one or more devices while mitigating interference to one or more other base stations. A potential device pathloss to the macrocell can be computed based on a measured pathloss thereto applied with a coverage area of the low power base station to emulate a worst-case device, one or more received measurement reports, and/or the like. The RoT threshold can be computed based at least in part on the pathloss and/or a maximum interference level at the macrocell. In addition, the RoT threshold can be adapted based on a reverse link attenuation level. | 10-11-2012 |
20120264467 | WIRELESS BASE STATION RECEIVING DEVICE, AND SIGNAL DEMODULATION METHOD AND PROGRAM USED THEREIN - In order to improve the efficiency of user signal demodulation processing including interference suppression processing, a wireless receiving unit ( | 10-18-2012 |
20120270581 | CONTROLLING THE INTERFERENCES GENERATED BY RADIO SIGNALS - The present invention concerns a method for controlling the interferences generated by radio signals transferred by or to wireless telecommunication devices of a wireless cellular telecommunication network. The method comprises the steps of:
| 10-25-2012 |
20120270582 | INTERFERENCE CONTROL IN A WIRELESS COMMUNICATION SYSTEM - For interference control, a sector m estimates interference observed from terminals in neighbor sectors and obtains an interference estimate. Sector m may generate an over-the-air (OTA) other-sector interference (OSI) report and/or an inter-sector (IS) OSI report based on the interference estimate. Sector m may broadcast the OTA OSI report to the terminals in the neighbor sectors. These terminals may adjust their transmit powers based on the OTA OSI report. Sector m may send the IS OSI report to the neighbor sectors, receive IS OSI reports from the neighbor sectors, and regulate data transmissions for terminals in sector m based on the received IS OSI reports. Sector m may control admission of terminals to sector m, de-assign admitted terminals, schedule terminals in sector m in a manner to reduce interference to the neighbor sectors, and/or assign the terminals in sector m with traffic channels that cause less interference to the neighbor sectors. | 10-25-2012 |
20120276936 | APPARATUS AND METHOD FOR REESTABLISHING RADIO LINK IN WIRELESS COMMUNICATION SYSTEM - The present invention discloses an apparatus and method for performing radio link reestablishment in a wireless communication system. Furthermore, the present invention discloses a radio link reestablishment request message, including a reestablishment cause indicator on which whether a Radio Link Failure (RLF) was generated by User Equipment (UE) is determined, a cause of the occurrence of the RLF is determined, and whether the cause of the radio link reestablishment is In-Device Coexistence interference (IDC) due to the UE. Accordingly, a network may know a cause of the occurrence of an RLF generated during a handover. In particular, the network may know whether the cause of the occurrence of the RLF is a handover failure or RLF due to IDC. Consequently, a radio link can be efficiently reestablished, and also network parameters can be controlled. | 11-01-2012 |
20120276937 | METHOD AND ARRANGEMENT IN A TELECOMMUNICATION NETWORK WITH INTERCELL INTERFERENCE COORDINATION - Methods and arrangements in a telecommunication network for intercell interference coordination. The telecommunication network comprises a first base station, acting as serving base station for a mobile station, and a second base station. The method comprises determining that transmission interference to the mobile station is to be limited. The method also comprises triggering the mobile station to send a signal on a radio resource, which signal is to be received by the second base station, enabling the second base station to select a transmission parameter that limits interference for the mobile station. | 11-01-2012 |
20120282960 | Interference Control - When it is determined that a first estimate of the total level of interference towards transmissions associated with a first access node from transmissions associated with other access nodes exceeds a predetermined target maximum value; then in dependence on the extent to which said first estimate exceeds said target maximum value, selecting one or more of said other access nodes to which to make a request to reduce the transmission power of interfering transmissions, and/or selecting an amount by which to request any one or more of said other access nodes to reduce the transmission power of interfering transmissions. | 11-08-2012 |
20120289266 | COGNITIVE RADIO BASE STATION AND COMMUNICATION METHOD THEREOF IN MULTI-USER MULTIPLE-INPUT MULTIPLE OUTPUT COGNITIVE RADIO NETWORK SYSTEM - A communication method for a cognitive radio (CR) base station in a multi-user multiple-input multiple-output (MIMO) CR communication system including the CR base station and CR terminals, may include calculating, from an interference channel, an orthogonal projection matrix to be used for removing interference on a primary user through use of a zero forcing (ZF) processing scheme, and obtaining a beamforming weight vector for each of the CR terminals, through use of the orthogonal projection matrix. | 11-15-2012 |
20120289267 | METHOD FOR INTERFERENCE ALIGNMENT IN WIRELESS NETWORK - A method for interference alignment in wireless network having 3 transmitters and 3 receivers which are equipped with M antennas is provided. The method comprising: transmitting, performed by each of the 3 transmitters, a pilot signal known to the 3 receivers; estimating, performed by each of the 3 receivers, each channel from transmitter; transmitting, performed by each of the 3 receivers, feedback information to target transmitter; and determining, performed by transmitter 2 and transmitter 3, a precoding vector; wherein a degree of freedom(DoF) of a transmitter 1 is (M/2−α), a DoF of the transmitter 2 or the transmitter 3 is M/2. | 11-15-2012 |
20120309438 | METHOD AND DEVICE FOR MAINTAINING THE PERFORMANCE QUALITY OF A COMMUNICATION SYSTEM IN THE PRESENCE OF NARROW BAND INTERFERENCE - A system that incorporates teachings of the subject disclosure may include, for example, a method for receiving a mitigation strategy for reducing interference caused by at least one narrow band interferer detected in a wide frequency band according to an average wideband power level, an adaptive threshold, or both, creating a message according to the mitigation strategy to transmit to at least one communication device transmitting wireless signals that are associated with the at least one narrow band interferer, and transmitting the mitigation message to the at least one communication device to cause the at least one communication device to adjust operations of a wireless transmitter of the at least one communication device. Other embodiments are disclosed. | 12-06-2012 |
20120309439 | TRANSMISSION POWER CONTROL METHOD, COMMUNICATION DEVICE AND PROGRAM - There is provided a method for controlling a transmission power in a second communication service making secondary usage of a spectrum assigned to a first communication service, with use of any node of one or more secondary usage node that transmits a radio signal of the second communication service, comprising the steps of: acquiring an acceptable interference power allocated to the second communication service; calculating a total sum of interference power levels on the first communication service based on transmission powers respectively required for the one or more secondary usage node; and excluding any secondary usage node of the one or more secondary usage node from allocation of the transmission power when the calculated total sum of interference power levels is larger than the acceptable interference power. | 12-06-2012 |
20120315935 | SYSTEM AND METHOD FOR DETERMINING THE SEVERITY OF INTERFERENCE IN DIFFERENT AREAS OF A CELLULAR RADIO NETWORK AND COORDINATING RADIO RESOURCE MANAGEMENT FEATURES IN RESPONSE - An interference analysis tool for identifying an interference problem area in a cellular radio network in which at least a first User Equipment (UE | 12-13-2012 |
20120315936 | COMMUNICATION CONTROL METHOD, COMMUNICATION SYSTEM, AND MANAGEMENT SERVER - A management server in a network including a first transmitting device that communicates with a first receiving device and a second transmitting device that communicates with a second receiving device. The management server includes a network interface that receives a parameter corresponding to a level of improvement of communication quality at the second receiving device, and a processor that calculates an allowable interference amount at the first receiving device based on the parameter. | 12-13-2012 |
20120315937 | METHOD AND DEVICE FOR MAINTAINING THE PERFORMANCE QUALITY OF A COMMUNICATION SYSTEM IN THE PRESENCE OF NARROW BAND INTERFERENCE - A system that incorporates teachings of the subject disclosure may include, for example, a method for scanning wireless signals in a wide frequency band, measuring power levels in narrow frequency bands from the wireless signals, determining a threshold according to an average wideband power level or at least a portion of the power levels in the narrow frequency bands, detecting from the wireless signals a narrow band interferer based on the threshold, and initiating a strategy for responding to interference in the wide frequency band caused by the detected narrow band interferer. Other embodiments are disclosed. | 12-13-2012 |
20120322476 | Wireless Communication System, Coexistence Manager Installed In Said System, And Method For Wireless Communication - Disclosed is a wireless communication system capable of avoiding interference even when a network including a secondary user coexists. The wireless communication system includes a primary user belonging to a first network, a first secondary user belonging to a second network, and a coexistence manager (CM). The coexistence manager (CM) acquires information relating to spectrum holes that are, at least temporarily, not in use by the primary user. In addition, the coexistence manager (CM) determines whether or not usage of the spectrum holes by the first secondary user causes interference. If the determination result is that interference is caused, coexistence manager (CM) notifies to this effect a second secondary user belonging to a third network, which differs from the second network. | 12-20-2012 |
20120322477 | APPARATUS FOR TRANSMITTING AND RECEIVING SIGNAL IN DISTRIBUTED ANTENNA SYSTEM - The present invention relates to a method for receiving a signal through a terminal in a distributed antenna system (DAS) comprising the steps of: receiving composition information of a local midamble corresponding to a terminal or a terminal group including the terminal from a base station which belongs to the DAS; and receiving the local midamble from the base station, and the local midamble can be a midamble corresponding to one or more effective transmission antennas associated with the terminal or the terminal group of a plurality of antennas of the base station. | 12-20-2012 |
20120322478 | METHOD AND DEVICE FOR MAINTAINING THE PERFORMANCE QUALITY OF A COMMUNICATION SYSTEM IN THE PRESENCE OF NARROW BAND INTERFERENCE - A system that incorporates teachings of the subject disclosure may include, for example, a method for measuring power levels of signals provided by a receiver configured to scan radio frequency signals over a wide frequency band, calculating an average power level from at least a portion of the measured power levels, determining a threshold, detecting interference in the wide frequency band based on the threshold, the average power level, or both, and causing a null that substantially suppresses the interference received by the receiver. Other embodiments are disclosed. | 12-20-2012 |
20120329497 | RADIO BASE STATION AND COMMUNICATION CONTROL METHOD - A first radio base station ( | 12-27-2012 |
20120329498 | APPARATUS AND METHOD FOR CONTROLLING INTER-CELL INTERFERENCE - An apparatus and method for controlling inter-cell interference is disclosed. The user equipment for controlling inter-cell interference in a wireless communication system includes an interference level measuring module configured to measure interference levels of neighboring cells using at least one of information about the number of antennas among antennas deployed in the neighboring cells, information about indexes of the effective antennas, and information about reference signal of the neighboring cells, an interference restriction request determination module configured to compare the interference levels of the neighboring cells with a predetermined threshold and to determine whether or not UE requests an interference restriction to the neighboring cells, and a transmitter configured to transmit information about one or more neighboring cells, to which the interference restriction request will be transmitted, to a serving base station. | 12-27-2012 |
20130012249 | METHODS AND APPARATUS FOR DYNAMIC CARRIER SELECTION FOR CELL BASE STATIONS - Apparatus and methods are disclosed for mitigating interference to radio base stations. A first base station provides a served cell that at least partially overlaps a served cell of a second base station. The first and second base stations are part of a telecommunications system. The method includes identifying at least one carrier that is preferable for the second base station to utilize for communications with at least one UE to avoid interference. The method further includes communicating an instruction message from the first base station to the second base station that instructs the second base station to use the at least one carrier for communications. | 01-10-2013 |
20130017849 | MITIGATION OF INTERNETWORK INTERFERENCE - When a device in one wireless network receives interfering transmissions from an overlapping neighboring network, the neighboring network may be notified of the interference so that non-interfering schedules can be worked out. In one embodiment, the device receiving, the interference may broadcast its own communications schedule. Device(s) in the interfering network may pick up that schedule, and pass it on to their controller, which can rearrange its own network schedule to be non-interfering. In another embodiment, the device receiving the interference may notify its own network controller with the pertinent information, and that controller may contact the controller of the interfering network to coordinate non-interfering schedules. | 01-17-2013 |
20130017850 | METHOD AND APPARATUS FOR AN ADAPTIVE FILTER ARCHITECTURE - A system that incorporates teachings of the subject disclosure may include, for example, a method for scanning a radio frequency spectrum for an available frequency band, selecting an available frequency band in the radio frequency spectrum even if the available frequency band is affected by radio frequency interference, measuring a signal strength in portions of the available frequency band, correlating the signal strength of each portion to generate a correlation factor, detecting radio frequency interference in the available frequency band according to the correlation factor, and generating tuning coefficient data to cause the filter apparatus to substantially suppress the radio frequency interference in the available frequency band. Other embodiments are disclosed. | 01-17-2013 |
20130023295 | METHOD, APPARATUS, AND COMPUTER PROGRAM PRODUCT FOR WIRELESS NETWORK DISCOVERY BASED ON GEOGRAPHICAL LOCATION - Method, apparatus, and computer program product embodiments are disclosed for wireless resource sharing between heterogeneous wireless networks to enable coexistence of secondary networks. An example embodiment of the invention includes a method, comprising: receiving, at an apparatus or entity, information associated with a wireless network; determining, by the apparatus or entity, a geographic communication area and one or more geographic interference areas associated with the wireless network based on the received information; transmitting, by the apparatus or entity, a message to a destination to register the wireless network and the determined geographic communication area and one or more geographic interference areas associated with the wireless network; and receiving, by the apparatus or entity, confirmation of the registering of the wireless network at the destination and information associated with zero or more wireless networks that at least one of potentially interfere with the determined geographic communication area associated with the wireless network, or potentially experience interference caused by the determined one or more interference areas associated with the wireless network. | 01-24-2013 |
20130029704 | Enhanced In-Device Coexistence Interference Avoidance Using Predetermined Downlink Channel - A method, system and device are provided for avoiding in-device coexistence interference between different radio technologies deployed in adjacent bands on the same device by allocating a non-interfering downlink signaling channel for downlink reception of interference avoidance instructions at the UE device. In operation, a user equipment device detects IDC interference and sends an IDC indication message to the radio network to get an appropriate solution, but instead of waiting at the current frequency to receive the IDC response from the radio network, the user equipment device moves to a non-interfering downlink signaling channel for downlink reception of interference avoidance instructions. | 01-31-2013 |
20130029705 | METHOD AND APPARATUS FOR IMPLEMENTING NETWORK COGNITION - The present invention discloses a method and an apparatus for implementing network cognition. The method includes: determining a type of a received network task; according to the type of the received network task, selecting at least one cognitive capability identifier corresponding to the type of the network task; using network devices with the at least one cognitive capability identifier as alternative network devices; determining an alternative network device that is among the alternative network devices and has a cognitive capability that meets a condition for performing the network task is a target network device; and controlling the target network device to perform the network task. | 01-31-2013 |
20130029706 | Spectrum Sharing and Management of Cognitive Transmission - A wireless spectrum is shared between a primary communication system and secondar communication system operating in an overlapping geographical region. A primary transmitter broadcasts a primary signal, and a secondary transmitter transmits a secondary signal, both using a primary wireless spectrum assigned to the primary communication system. The secondary transmitter transmits the secondary signal to a secondary receiver with power (1-a)P and transmits the primary signal with power αP. The parameter α is computed to ensure a predetermined quality of reception of the primary signal by a hypothetical primary receiver located near the secondary transmitter. The secondary transmitter may compute a feasibility of using cognitive transmission and, when the computed feasibility exceeds or docs not exceed a feasibility threshold, it selects to enable or disable, respectively, the use of the primary wireless spectrum to transmit from the secondary transmitter. | 01-31-2013 |
20130035124 | SYSTEMS AND METHODS FOR PROVISIONING AND ALLOCATING A COMMODITIZED SPECTRUM OBJECT - A provisioning engine provisions spectrum into an allocable spectrum object. The provisioning engine includes an interface configured to receive inputs of available spectrum information and a plurality of provisioning parameters. The plurality of provisioning parameters include at least one signal strength limit, and may include at least first and second signal strength limits that may be boundary strength limit and an allocation strength limit. A controller is configured to execute a spectrum provisioning application that is stored in a memory and, by execution of the spectrum provisioning application, the provisioning engine is configured to generate an allocable spectrum object in accordance with the provisioning parameters. Spectrum encompassed within the spectrum object is allocable by an allocation engine to spectrum users in accordance with the provisioning parameters. An allocation engine in turn allocates spectrum encompassed within the provisioned spectrum object in accordance with the provisioning parameters. | 02-07-2013 |
20130040673 | METHOD AND APPARATUS FOR REFERENCE TIME ACQUISITION FOR POSITIONING REFERENCE SIGNALS IN A WIRELESS COMMUNICATION NETWORK - A base station determines a muting configuration for reference signal (RS) transmission as a pattern defined by the combination of a muting sequence and a reference point. Muting occasions for a given wireless communication network cell may be differentiated from another cell by use of a different muting sequence, a different reference point, or both. Wireless communication apparatuses such as User Equipments (UEs) determine when the reference signals are muted in the cell based on the periodic muting sequence and the reference point received in assistance data transmitted by the base station. The network may alternatively utilize a common muting sequence with different reference points, a common reference point with different muting sequences, or different sequences and different reference points across multiple cells. | 02-14-2013 |
20130059615 | Resource Distribution Method for Throughput Maximization in Cooperative Cognitive SIMO Network - The invention relates to a resource distribution method for throughput maximization in a cooperative cognitive SIMO network. The primary user sends data after receiving a cooperation confirmation message, and the cognitive network keeps silence, receives the information data of the primary user and simultaneously decodes the data. The cognitive users which successfully decode the data utilize part of their transmission power to send the data of themselves to the cognitive base station, the remaining transmission power is used for helping in forwarding the data of the primary user; the cognitive users which cannot successfully decode the data only send the data of themselves and do not forward the data of the primary user. The cognitive base station eliminates the interference of the data of primary user in the received mixed signals and performs beamforming on the signals after eliminating the interference. According to the combined adjustment of the transmission power vector, the power distribution factor vector and the beamforming weight vectors of the cognitive SIMO network, the maximum throughput performance can be realized in the cognitive network while the target transmission rate of the primary user is ensured, furthermore, very fast convergence rate can be realized in the proposed resource distribution method. | 03-07-2013 |
20130059616 | RADIO STATION, TRANSMITTING STATION, AND FREQUENCY BAND SHARING METHOD - The invention has a step where a transmitting station in a second radio communication system determines whether transmission of a second radio communication system signal using a shared frequency band is possible or not based on load information of a first radio communication system broadcast from a base station in the first radio communication system, a step where the transmitting station in the second radio communication system calculates predicted interference power caused in a receiving station in the first radio communication system by the second radio communication system signal transmitted using the shared frequency band, and a step where the base station in the first radio communication system increases an allowable interference level of a first radio communication system signal transmitted using the shared frequency band based on the predicted interference power broadcast from the transmitting station in the second radio communication system. | 03-07-2013 |
20130065623 | WIRELESS TRANSCEIVER WITH REDUCED TRANSMIT EMISSIONS - Methods and apparatus for reducing transmit emissions are described herein. The transmit out of band emissions in an adjacent band can be reduced while complying with existing wireless communication standards through utilization of one or more of reduced transmit bandwidth, transmit operating band offset, and channel index remapping. The transceiver can support a receive operating band substantially adjacent to a band edge. The transmit operating band can be offset from an adjacent frequency band, and can use a narrower operating band than is supported by the receiver. The transmit baseband signal can have a reduced bandwidth to reduce the amount of noise. The frequency offset can introduce a larger transition band between the transmit operating band edges and the adjacent frequency band of interest. The transceiver can remap channel assignments to compensate for the frequency offset such that the frequency offset introduced in the transmitter is transparent to channel allocation. | 03-14-2013 |
20130065624 | RESOURCE PARTITIONING FOR UPLINK IN A WIRELESS COMMUNICATION NETWORK - Techniques for performing resource partitioning are described. In an aspect, adaptive resource partitioning may be performed to dynamically allocate available resources for the uplink to nodes, e.g., base stations. Each node may be assigned a list of target interference-over-thermal (IoT) levels for the available resources by the adaptive resource partitioning. Each node may obtain a list of target IoT levels for itself and at least one list of target IoT levels for at least one neighbor node. The list of target IoT levels for each node may include a configurable target IoT level on each available resource for the node. Each node may schedule its UEs for transmission on the available resources (e.g., may determine transmit power levels and rates for the UEs) based on the target IoT levels for itself and the neighbor node(s) such that the target IoT levels for the neighbor node(s) can be met. | 03-14-2013 |
20130072241 | Method and Device for Handling Base Sequences in a Communications Network - The embodiments herein relate to a method in a network node ( | 03-21-2013 |
20130084906 | RADIO FREQUENCY AMPLIFIER NOISE REDUCTION SYSTEM - An amplifier for controlling or reducing broadband noise is disclosed. An amplifier determines whether a useful signal is being amplified and controls the gain of the amplifier at least when useful signals are not being amplified to prevent or minimize the amplification of noise. | 04-04-2013 |
20130084907 | METHOD AND DEVICE FOR INTER-CELL INTERFERENCE COORDINATION - To address the problem of inter-cell interference, the present invention proposes a method for inter-cell interference coordination and a device thereof. In one embodiment of the present invention, there is provided a method of coordinating radio resource in a base station of wireless communication network, comprising the steps of: S | 04-04-2013 |
20130090141 | AVOIDING INTERFERENCE IN COGNITIVE RADIO COMMUNICATIONS - A method, apparatus, and computer program for cognitive radio communications are provided. A reference signal is received from a transmitter of a primary system, and the received reference signal is received with an arbitrarily selected beamforming setting. Then, a signal quality metric is calculated from the received and beamformed reference signal. If the signal quality metric indicates that a reception power of the received signal is low, transmission of a data signal to a wireless communication device of a secondary system is scheduled. In the scheduled transmission in the secondary system, the same beamforming setting as was used in the reception of the reference signal is employed. | 04-11-2013 |
20130090142 | METHOD OF AVOIDING IDC INTERFERENCE IN A WIRELESS COMMUNICATION SYSTEM AND APPARATUS FOR SAME - Disclosed is a method of transmitting, by a terminal, IDC (In-Device Coexistence) interference information to a base station, according to the present invention. Specifically, the invention comprises the steps of: receiving quality measurement configuration information from the base station; measuring quality using the information when operations of one or more second communication modules coexisting in the terminal are sensed; setting a frequency used in the measuring quality as a disabled frequency due to the IDC interference when the measured quality is less than a threshold value; and transmitting information about the disabled frequency to the base station. | 04-11-2013 |
20130095869 | Uplink Switched Antenna Transmit Diversity Method and Apparatus - A first wireless communication device is in communication with a second wireless communication device over an uplink communication link from the first wireless communication device to the second wireless communication device. Adaptive uplink antenna switching is performed at the first wireless communication device by switching between at least two antennas at the first wireless communication device in accordance with at least one antenna switching parameter to support the uplink communication link, determining whether each antenna switch is successful or unsuccessful and accumulating a history of successful and unsuccessful antenna switches. The at least one antenna switching parameter is modified based on the accumulated history of successful and unsuccessful antenna switches. | 04-18-2013 |
20130095870 | UPLINK NOISE MINIMIZATION - A method and apparatus for controlling uplink signal power in a distributed antenna system | 04-18-2013 |
20130102340 | SURROUNDING CELL MONITORING METHOD - A surrounding cell monitoring method is applied in a mobile terminal wirelessly communicating with a first cell through a first target channel. The surrounding cell monitoring method includes the steps of: determining whether adjacent channel interference (ACI) of the target channel exists; determining whether a first power level of the adjacent channel is greater than a second power level of the target channel by a threshold difference when the ACI exists, when the ACI does exist; determining whether an adjacent BSIC of the adjacent channel can be decoded when the first power level is greater than the second power level by the threshold difference; and skipping an operation of decoding a target BSIC of the target channel when the adjacent BSIC of the adjacent channel can be decoded successfully. | 04-25-2013 |
20130102341 | COGNITIVE TRANSMISSION CONTROL SYSTEM - A cognitive radio transmission control system that controls the physical layer protocol based on algorithm feedback from receivers is disclosed. | 04-25-2013 |
20130109420 | Method and Arrangement For Reducing Interference and Enhancing Coverage | 05-02-2013 |
20130115984 | SYSTEM AND METHOD FOR MANAGING SPECTRUM RESOURCES - A central registration system provides channel maps of available spectrum channels to radio devices. The channel map indicates relative noise floor amounts among the available channels. For this purpose, an amount of predicted interference caused by high-power protected transmitters on each channel available to the requesting radio device for wireless communications is determined, where interference from primary channel and out-of-band emissions of the transmitters is considered. | 05-09-2013 |
20130115985 | BEAMFORMING COORDINATION IN HETEROGENEOUS NETWORKS - Technology for spatial domain beamforming coordination at a low power node (LPN) in a heterogeneous network (HetNet) is disclosed. One method can include the LPN collecting spatial feedback information of macro node interference from a plurality of wireless devices in a LPN cell. The LPN can compile the spatial feedback information into a spatial feedback report. The LPN can send the spatial feedback report from the LPN to a macro node for calculating a beamforming vector to reduce the macro node interference for the plurality of wireless devices in the LPN cell. | 05-09-2013 |
20130115986 | METHODS AND APPARATUS FOR PARTIAL INTERFERENCE REDUCTION WITHIN WIRELESS NETWORKS - Methods and apparatus that enable one or more wireless networks to minimize inter-cellular interference (ICI) at a receiver. In one embodiment, the network comprises an OFDM-based cellular network, and the method comprises utilizing a priori knowledge of non-data portions of signals from multiple base stations in order to schedule transmissions. In one variant, these non-data portions comprise pilot tones; the pilot tones can be scheduled onto various time-frequency resources of the network so as to minimize ICI. The mobility context of the receiver can also be used as a basis for dynamically adjusting the pilot tone density. In another variant, precoding (e.g., Tomlinson-Harashima precoding) can be applied to “shape” the non-data portions of the transmitted signals so as to mitigate ICI. In yet other variants, frame preambles and learning sequences are used as the basis for invoking selective transmission time shifts across the potentially interfering base stations so as to minimize ICI. | 05-09-2013 |
20130115987 | Hybrid Approach for Physical Downlink Shared Channel (PDSCH) Interference Cancellation - Certain aspects of the present disclosure relate to a hybrid approach for Physical Downlink Shared Channel (PDSCH) Interference Cancellation (IC). In certain aspects, if the PDSCH information is known for a serving cell but not be known for interfering cell(s), a hybrid approach that involves using Codeword-level IC (CWIC) for the serving cell and using Symbol-level IC (SLIC) for the interfering cells may be used for better IC performance. The hybrid IC approach may start with a UE attempting to decode the serving cell PDSCH. If the decode is unsuccessful, the UE may perform CWIC for the serving cell followed by SLIC using the results of the CWIC stage. After the SLIC stage, the UE may attempt to decode the serving cell PDSCH again. The UE may perform multiple operations of this method until the serving cell PDSCH is successfully decoded or a maximum number of iterations is reached. | 05-09-2013 |
20130115988 | METHODS AND APPARATUS FOR MITIGATING KNOWN INTERFERENCE - Systems and methods for mitigating known interference at a receiving device are provided. A signal from a transmission source is received by a receiving device that is affected by an interference source. At least one of a first pilot signal associated with the transmission source and a second pilot signal associated with the interfering source is determined. The first pilot signal includes information broadcast from the transmission source and the second pilot signal includes information broadcast from the interference source. Interference caused by the interference source is mitigated from the received signal using at least one of the first pilot signal and the second pilot signal. | 05-09-2013 |
20130122947 | METHODS AND APPARATUS RELATED TO POWER CONTROL AND/OR INTERFERENCE MANAGEMENT IN A MIXED WIRELESS COMMUNICATIONS SYSTEM - Methods and apparatus related to the sharing of wide area network (WAN) uplink bandwidth with peer to peer communication signaling usage are described. A base station transmits a signal to be used by a peer to peer wireless terminal in controlling its peer to peer transmit power level. The peer to peer wireless terminal receives and measures the strength of the base station signal. The measurement information is used in determining whether or not peer to peer signal transmission is permitted and/or in determining a peer to peer transmission power level. Current service level information and/or encoded information, e.g., an interference level indicator value, conveyed by the received base station signal are, in various embodiments, also utilized in determining a peer to peer transmission power level. | 05-16-2013 |
20130122948 | Multi-Antenna Scheduling System and Method - A wireless communication method and system using virtual MIMO (“V-MIMO”) are provided. Post processing signal to interference and noise ratios (“SINR”) for a plurality of signals corresponding to a plurality of mobile terminals arranged as a V-MIMO group are estimated. The one of the plurality of mobile terminals having the highest post processing SINR is selected. Wireless communication for the selected mobile terminal is scheduled. The signal corresponding to the selected mobile terminal is cancelled. Post processing signal to interference and noise ratios (“SINR”) for the signals corresponding to the remaining mobile terminals is re-estimated. The one of the remaining mobile terminals having the highest post processing SINR is selected. Wireless communication for the selected remaining mobile terminal is scheduled. | 05-16-2013 |
20130130731 | METHOD AND APPARATUS FOR TRANSCEIVING CHANNEL TRANSMIT POWER INFORMATION IN A WIRELESS COMMUNICATION SYSTEM - Disclosed are a method and apparatus for transceiving channel transmit power information in a wireless communication system. According to one embodiment of the present invention, transmit power information for the channel available for the device which operates in a television band may be signaled for each individual channel. | 05-23-2013 |
20130137474 | TRANSMISSION POWER CONTROL METHOD FOR A WIRELESS COMMUNICATION SYSTEM - Transmission power relative to a propagation path having a variation in gain is controlled to increase communication channel capacity, and a data rate is controlled in accordance with the variation of the increased communication channel capacity. In order to increase the communication channel capacity, the transmission power is determined so that the sum of noise power (=received noise power/propagation path gain) converted into one at a transmitter and the transmission power becomes constant. As a result, contrary to the background art, the transmission power is controlled to be reduced when the propagation path gain decreases and to be increased when the propagation path gain increases. | 05-30-2013 |
20130150104 | COMMUNICATION TERMINAL AND METHOD FOR RECEIVING DATA - According to one aspect of this disclosure, a communication terminal is provided comprising a receiver configured to receive pilot information from a first transmitter via a pilot channel; a controller configured to control the receiver to receive, during a predetermined period, pilot information from a second transmitter; and a channel estimator, configured to provide an estimation of transmission characteristics between the communication terminal and the first transmitter for receiving data from the first transmitter over the communication connection during the predetermined period based on other information about the transmission characteristics between the communication terminal and the first transmitter than the pilot information which is sent by the first transmitter via the pilot channel during the predetermined period. | 06-13-2013 |
20130150105 | METHOD FOR RECEIVING INFORMATION AND COMMUNICATION TERMINAL - According to one aspect of this disclosure, a method for receiving information is provided, the method comprising determining whether there is a conflict between the reception of first information by a communication terminal from a first base station and the reception of second information by the communication terminal and depending on the result of the determination, controlling a receiver of the communication terminal to receive the first information from a second base station. | 06-13-2013 |
20130150106 | Interference Management In Wireless Communication Networks - A scheme to reduce the problem of radio interference between wireless devices such as MTC devices in a multi-RAT scenario. Wireless devices are configured (S | 06-13-2013 |
20130157704 | MOBILE STATION APPARATUS AND SIGNAL DETECTION AND CHANNEL ESTIMATION METHOD - To cancel interference from the other cells and improve throughput characteristics without needing complicated processing, provided are a reception section that receives a reception signal including signal components from a plurality of base station apparatuses (BSs), and a signal detection and channel estimation section ( | 06-20-2013 |
20130157705 | SIGNAL TRANSMISSION METHOD AND SYSTEM FOR TRANSMITTING SIGNAL BY USING INTERFERENCE CONTROL METHOD AND/OR TRANSMISSION POWER CONTROL METHOD - Provided are a signal transmission method and a network apparatus to control interference in a radio communication network. A terminal may transmit to the network apparatus, signal quality information associated with a radio channel formed between the terminal and a corresponding base station. The corresponding base station may output a signal received by the plurality of terminals, based on the signal quality information. | 06-20-2013 |
20130172029 | COMMUNICATION SYSTEM FOR MOBILE USERS USING ADAPTIVE ANTENNA WITH AUXILIARY ELEMENTS - A communication system communications system for communicating with mobile user terminals includes a base station having an adaptive antenna with a plurality of panels. Each of the plurality of panels are arranged to have a different field of view. Each panel has a plurality of main array antenna elements for simultaneously generating a plurality of dynamic communication beams that move with the mobile terminals and a plurality of auxiliary elements separate from the plurality of main array antenna elements used for interference cancelling signals cancelling interference between the plurality of dynamic communication beams generated by the plurality of main array elements. A gateway station is coupled to the base station. The gateway station forms a plurality of beams commands for each of the plurality of panels by communicating a plurality of control signals to the base station to form the plurality of dynamic communication beams. | 07-04-2013 |
20130172030 | COGNITIVE RADIO SENSING METHOD AND SYSTEM - The cognitive radio system and method uses a wideband chirp signal for characterization of the spectra that a mobile radio may use. A cognitive radio base station broadcasts the low power reference wideband chirp signal with bandwidth covering the sensed spectrum. At the receiver, spectral resolution in the presence of white noise is achieved by cross-correlating the chirp signal with a locally generated copy of itself (i.e., matched filtering). A Fast Fourier Transform (FFT) is applied to the output of this matched filtering. The FFT output is fed to a decision circuitry, where a threshold value is set to decide the minimum amplitude of utilized frequencies. This process eases sensing computational complexity and improves the quality of sensing, thereby offering enhanced cognition at the cognitive radio receiver. | 07-04-2013 |
20130184018 | INTERCELL FREQUENCY OFFSET COMPENSATION FOR FREQUENCY DOMAIN INTERFERENCE CANCELLATION AND EQUALIZATION FOR DOWNLINK CELLULAR SYSTEMS - Methods and apparatus are described for interference cancellation of interference components of a time domain signal in the frequency domain. A time domain sequence is received, and a plurality of overlapping time domain segments is generated from the time domain sequence. Frequency offset compensation to compensate for frequency offset associated with a serving cell is performed in the time domain, and the overlapping time domain segments are then converted to the frequency domain. Additional frequency offset compensation may be performed to compensation for the frequency offset associated with interfering cells. | 07-18-2013 |
20130184019 | FREQUENCY DOMAIN INTERFERENCE CANCELLATION AND EQUALIZATION FOR DOWNLINK CELLULAR SYSTEMS - Methods and apparatus are described for interference cancellation of interference components of a time domain signal in the frequency domain. A communications device receives a time domain sequence and generates overlapping time domain segments from the time domain sequence. The overlapping time domain segments are then converted to the frequency domain to generate frequency domain representations of the overlapping time domain segments. The frequency domain representations are stored in a residual memory, and interference components are directly removed from the frequency domain representations stored in the residual memory in the frequency domain. | 07-18-2013 |
20130184020 | WIRELESS COMMUNICATION DEVICE AND WIRELESS COMMUNICATION SYSTEM - A wireless communication device includes first wireless communication unit | 07-18-2013 |
20130190024 | BASE STATION, SYSTEM, AND METHOD OF UPLINK INTERFERENCE COORDINATION IN WIRELESS COMMUNCIATION - A macro base station includes a communication prohibited period setting unit of setting an uplink communication prohibited period to a user equipment belonging to the base station, and prohibits an uplink communication from the user equipment to a wireless communication base station per se during the uplink communication prohibited period. The user equipments belonging to the wireless communication base station per se and the second base station are divided into plural groups, and the uplink communication prohibited period is set to different time periods for the respective groups. Thereby, a communication characteristic is prohibited from being deteriorated at the second base station by an interference affected with the second base station separately from the first base station by the user equipment communicating with the first base station in the uplink communication. | 07-25-2013 |
20130190025 | VEHICLE-MOUNTED DEVICE AND CONGESTION CONTROL METHOD - The invention has the object of avoiding congestion while reducing differences between parameters for communication among vehicles. The vehicle-mounted device performing communication by radio signals with predetermined vehicle-mounted devices respectively equipped in a plurality of vehicles includes: a radio unit detecting radio signals to measure congestion level; a processor receiving, from each of the predetermined vehicle-mounted devices, a value of, among parameters relating to communication of the predetermined vehicle-mounted devices, a predetermined parameter for which the degree of contribution to congestion increases with increase in the value of the predetermined parameter; and a controller decreasing, when the congestion level measured by the radio unit exceeds a predetermined threshold value, the value of the predetermined parameter of its own device if the value of the predetermined parameter of its own device is greater than the average of the values of the predetermined parameter received at the processor. | 07-25-2013 |
20130196700 | Non-Orthogonal Transmit Mode - A first user equipment UE operating in a first/strong transmission mode determines that a second UE is operating in a second/weak mode and is allocated a same radio resource as the first UE. The first UE determines a transport format for transmissions to the second UE and uses that to decode and cancel a transmission received on the radio resource which is directed to the second UE, mitigating interference with a further transmission directed to the first UE. Various examples are given of specific resource allocation signaling used to determine that the second UE is operating in the second mode and is allocated the same radio resource, such as implicitly by a specific downlink control indication format or an explicit indication in a resource allocation directed to the first UE. The first UE can determine the transport format of the second UE from network signaling. | 08-01-2013 |
20130196701 | Downlink Inter-Cell Interference Cancellation with Cell Aggregation Coordinated Multi-Point - A method includes receiving at a user equipment from a network access node a temporary identifier associated with an interference cancellation group to which the user equipment is assigned; decoding a control channel using the temporary identifier to determine a downlink resource allocation for the user equipment and to determine a downlink resource allocation for at least one other user equipment assigned to the same interference cancellation group; and receiving a downlink signal in accordance with the determined downlink resource allocation for the user equipment while canceling interference from the downlink signal that is associated with the at least one other user equipment by using the determined downlink resource allocation for the at least one other user equipment. Apparatus for performing the method are also disclosed. | 08-01-2013 |
20130203453 | APPARATUS AND METHOD FOR CONTROLLING POWER TO MITIGATE INTERFERENCE IN WIRELESS COMMUNICATION SYSTEM - An apparatus and a method for controlling power in a wireless communication system are provided. The method includes receiving interference information comprising a resource usage rate, from at least one neighboring BS, calculating a throughput variance amount, which is expected if the serving BS changes power, experienced by the at least one neighboring BS, by using the interference information, calculating a throughput variance amount, which is expected if the serving BS changes power, of at least one Mobile Station (MS) having access to the serving BS, and controlling power for the at least one MS by using the throughput variance amount experienced by the at least one neighboring BS and the throughput variance amount of the at least one MS. The interference information represents a throughput variance amount generated in the at least one neighboring BS when the serving BS changes the power. | 08-08-2013 |
20130210473 | Dynamically Managing and Reconfiguring Wireless Mesh Networks - A wireless network with multiple subscriber systems in a lobe pool may operate by determining a state of the wireless network, identifying a new condition, the new condition including a new demand condition or a new network health condition, determining whether the new condition has a threshold impact on operations of the wireless network or component subscriber systems of the wireless network, and if the threshold impact exists, reconfiguring the wireless network to accommodate the new condition. | 08-15-2013 |
20130225216 | METHOD & APPARATUS FOR WIRELESS SYSTEM CONTROL - An example system includes a plurality of wireless communication elements and a controller. The plurality of wireless communication elements are configured to provide wireless service to a geographic area of interest, each wireless communication element comprising at least an antenna port or at least one antenna. The controller is configured to control the wireless communication elements, wherein the controller is configured to determine respective ones of the wireless communication elements that are to be activated or not activated. | 08-29-2013 |
20130225217 | Interference Coordination in Wireless Network Cloud Environment - A method, system and base station for implementing interference coordination. The method includes the steps of obtaining an interference coordination object; receiving interference coordination information from an object base station, parsing the interference coordination information based on the interference coordination object, and performing interference coordination by utilizing the parsed interference coordination information. The method and base station for implementing interference coordination according to the present invention can significantly improve the spectral resource utilization and the cell edge user's performance. | 08-29-2013 |
20130231147 | APPARATUS AND METHOD FOR INTERFERENCE MITIGATION - An apparatus and method for interference mitigation comprising determining if an unscheduled service transmission frequency is in a predefined frequency range; determining if an unscheduled service transmission power is less than a predefined power threshold; and performing one or both of the following: a) erase the baseband signal when an unscheduled service transmission is ON and stop the channel estimation process when the unscheduled service transmission is ON; b) initiate a smart channel information report. | 09-05-2013 |
20130231148 | METHOD AND APPARATUS OF HANDLING IN-DEVICE CO-EXISTENCE INTERFERENCE IN A MULTI-RADIO ENVIRONMENT - A method and apparatus of handling in-device co-existence interference in a multi-radio environment are provided. The method includes measuring an adjacent band interference value indicating an amount of adjacent band interference in a Long Term Evolution (LTE) band associated with an LTE radio entity prior to switching the LTE radio entity to an active state from an inactive state, comparing the adjacent band interference value with a predetermined threshold value, and reporting in-device co-existence interference in the LTE band to an evolved Node B (eNB) according to an outcome of the comparing of the adjacent band interference value with the predetermined threshold value. | 09-05-2013 |
20130237260 | METHOD FOR SUPPRESSING TRANSMISSION NOISE COMPRISED IN RECEIVED DOWNLINK SIGNAL AND COMMUNICATIONS APPARATUS UTILIZING THE SAME - A communications apparatus is disclosed. A first radio module provides a first wireless communications service and communicates with a first communications device in compliance with a first protocol. A second radio module provides a second wireless communications service and communicates with a second communications device in compliance with a second protocol. A transmission noise suppression device is operative to process downlink signals received by the first radio module to cancel transmission noise comprised in the downlink signals, where the transmission noise is generated when the second radio module is processing uplink signals to be transmitted. | 09-12-2013 |
20130237261 | METHOD FOR REDUCING INTERFERENCE AT A TERMINAL OF A WIRELESS CELLULAR NETWORK, WIRELESS CELLULAR NETWORK, NODE AND CENTRAL NODE OF A WIRELESS NETWORK - A method for reducing interference at a terminal of a wireless cellular network is described. The terminal experiences interference from a plurality of interfering nodes in the wireless cellular network. The method includes selecting the precoders of the interfering nodes such that the sum of distances between the interference projector matrices for the terminal is minimized. | 09-12-2013 |
20130237262 | METHOD AND APPARATUS FOR ADJUSTMENTS FOR DELTA-BASED POWER CONTROL IN WIRELESS COMMUNICATION SYSTEMS - Systems and methodologies are described that provide techniques for performing adjustments for delta-based power control and interference management in a wireless communication system. A terminal can utilize one or more delta-based power control techniques described herein upon engaging in a reverse link transmission after a predetermined period of silence or after receiving indications of interference from neighboring access points. A delta value can be computed through open-loop projection, based on which transmission resources such as bandwidth and/or transmit power can be increased or decreased to manage interference caused by the terminal. A delta value, other feedback from the terminal, and/or indications of interference caused by the terminal can also be communicated as feedback to a serving access point to allow the access point to assign transmission resources for the terminal. | 09-12-2013 |
20130244709 | INTERFERENCE MITIGATION IN THE CONTEXT OF HETEROGENEOUS NETWORKS WITH COORDINATED TRANSMISSION POINTS WITH A COMMON TRANSMISSION POINT IDENTITY - Technology is discussed for extending frequency and time based approaches, such as Inter-Cell Interference Coordination (ICIC) and enhanced ICIC (eICIC), to interference mitigation for clusters within a Wireless Wide Area Network (WWAN) of transmission points with a common transmission point identity. Multiple transmission power messages correlated to different transmission point characteristics can be configured among multiple transmission points sharing the same transmission point identity. These multiple transmission power messages can be used to coordinate transmissions from adjacent transmission points on differing frequencies. Additionally, new sets of reference signals can be configured to correlate to different transmission point characteristics. These new, correlated reference signals can be used to decouple measurements used to provide feedback to one set of transmission points from reference signals transmitted by another set of transmission points with the same transmission point identity. | 09-19-2013 |
20130244710 | Method and System for Removal of Noise in Signal - A method and system for reception of electromagnetic waves in which interference with radio frequencies of other electronics devices occurs comprising;
| 09-19-2013 |
20130252650 | MOBILE NETWORK, CORRESPONDING ACCESS NODE, PROCESSING UNIT AND METHOD FOR OPERATING THE MOBILE NETWORK - The present invention relates to a system comprising a processing unit, a plurality of access nodes adapted to communicate with a plurality of mobile terminals and wireless backhaul links adapted to connect said access nodes and a wireless backhaul termination interfacing with a core network, According to the present invention:—said processing unit determining dynamically out of said plurality of access nodes, access nodes to remain unused and, access nodes to be used for supporting communication of said mobile terminals, said determination taking into account at least one optimisation criterion consisting in reducing the interference between active access nodes and mobile terminals; said processing unit determining a mapping between said mobile terminals and said active access nodes,—said wireless backhaul links consisting in point-to-multipoint connections between said wireless backhaul termination and said access nodes. | 09-26-2013 |
20130252651 | SYSTEMS AND METHODS FOR DISTRIBUTED ANTENNA SYSTEM REVERSE PATH SUMMATION USING SIGNAL-TO-NOISE RATIO OPTIMIZATION - Systems and methods for distributed antenna system reverse path summation using signal-to-noise ratio optimization are provided. In one embodiment, a method for reverse path summation for a distributed antenna system comprises: normalizing an uplink noise floor for a plurality of remote antenna units of a distributed antenna system, wherein the uplink noise floor is normalized based on a first remote antenna unit having a lowest noise floor of the plurality of remote antenna units; and scaling an uplink output gain of each of the plurality of remote antenna units by a scaling factor, wherein the scaling factor attenuates the uplink output gain based on a composite maximum host peak power for a host unit coupled to the plurality of remote antenna units. | 09-26-2013 |
20130260805 | APPARATUS AND METHOD FOR CONTROLLING CELL TRANSMIT POWER TO REDUCE INTERFERENCE OF CELL AND MOBILE TELECOMMUNICATION BASE STATION FOR THE SAME - Provided are an apparatus and method for controlling transmit power of a base station and a mobile communication base station using the same, which can control transmission power for minimizing interference from the base station to a cell adjacent thereto. When a power amplifier outputs the minimum value of a power range restricted by a dynamic range in consideration of an offset against a lowest value of an output power, a comparator compares an optimal transmit power of the base station and the minimum value of a power range restricted by the dynamic range, and an attenuator attenuates the output power value of the power amplifier according to the comparison result. | 10-03-2013 |
20130260806 | MITIGATING INTERFERENCE IN A WIRELESS COMMUNICATION SYSTEM - A method of mitigating interference between carrier frequency bands of a carrier aggregation scheme. The method comprises: at a wireless device, receiving a first signal on a first carrier frequency band of the carrier aggregation scheme; mixing a second signal onto a second carrier frequency band of the carrier aggregation scheme and transmitting the second signal from the wireless device; executing code on a processing apparatus of the device to generate a reconstructed interference signal, by mixing an instance of the signal with a frequency location of an interfering harmonic from the second carrier frequency band falling in the first carrier frequency band; and removing the reconstructed interference signal from the first signal. | 10-03-2013 |
20130260807 | METHOD AND SYSTEM FOR CANCELLING ADJACENT CELLS INTERFERENCE SIGNAL IN A WIRELESS COMMUNICATION SYSTEM - The present invention relates to a method for cancelling adjacent cells interference signal in a wireless communication system. In one embodiment this is accomplished by receiving desired user signal and cancel the channel effect using the desired users reference and or pilot signals, by a serving base station, identifying interference power by estimating the interferer power, determining if the interference is more than threshold, monitoring the interference and identify the interferer signal, re-generating the interference signal source and perform the channel estimate for the interferer, and canceling the interference by applying the interference pattern and the channel estimate to the desired user who's interference is more than threshold. | 10-03-2013 |
20130260808 | METHOD FOR TRANSCEIVING SIGNAL IN MULTI-NODE SYSTEM, AND DEVICE THEREFOR - Disclosed is a signal transceiving method which can reduce interference between nodes in a multi-node system. The method comprises the steps of: receiving reference signal configuration information from a first node; receiving a reference signal from a second node; measuring interference caused by the second node using the reference signal, and generating interference node information; and transmitting the interference node information to the first node, wherein the reference signal configuration information includes mapping information between the second node and the reference signal, and the interference node information includes an index of the reference signal. | 10-03-2013 |
20130267265 | WIRELESS COMMUNICATIONS SYSTEM WITH INTERFERENCE MITIGATION AND ASSOCIATED METHODS - A communications system includes spaced apart sensing nodes each configured to receive signals within occupied portions of a frequency spectrum, and a coordinator node configured to communicate with the spaced apart sensing nodes. The coordinator node determines the occupied portions of the frequency spectrum, and determines unoccupied portions of the frequency spectrum based upon the occupied portions. A pair of wireless communications devices is configured to communicate with each other and with the coordinator node. The pair of wireless communications devices may operate within an unoccupied portion of the frequency spectrum based on using a communications signal comprising a continuous phase modulated waveform, with at least one waveform parameter being selected to reduce interference with the occupied portions of the frequency spectrum. | 10-10-2013 |
20130267266 | METHOD OF COMMUNICATING BETWEEN BASE STATION AND TERMINAL BASED ON INTERFERENCE ALIGNMENT IN MULTI-CELL MULTI-USER MULTIPLE-INPUT MULTIPLE-OUTPUT (MIMO) INTERFERENCE CHANNEL AND METHOD AND APPARATUS OF COMMUNICATION USING INTERFERENCE ALIGNMENT AND BLOCK SUCCESSIVE INTERFERENCE PRE-CANCELLATION IN MULTI-USER MULTIPLE-INPUT MULTIPLE-OUTPUT INTERFERENCE CHANNEL - A communication method of a base station and a terminal based on interference alignment in a multi-cell multi-user multiple-input multiple-output (MIMO) interference channel and a method and apparatus of communication using interference alignment and block successive interference pre-cancellation in a multi-user MIMO interference channel. The base station may determine a precoding matrix to maximize a signal to interference and noise ratio (SINR) and a signal to leakage and noise ratio (SLNR) in the interference channel, and a terminal communicating with the base station may determine a decoding matrix to align interference. The transmitter including a multicell interference channel may calculate a rotation matrix for interference alignment, identify effective symbol vectors using the rotation matrix, and generate a transmit signal of a target transmitter to pre-cancel interference corresponding to a transmit signal of a neighboring transmitter. | 10-10-2013 |
20130273949 | Method and Apparatus for Co-location of Two Radio Frequency Devices - A method for avoiding signal interference between a first RF circuit and a second RF circuit is provided. The first and second RF circuits are co-located and the first RF circuit is configured to operate in a first frequency range. The second RF circuit is configured to operate in a second frequency range, where the first frequency range overlaps, at least in part, the first frequency range. The method initiates with a controller that is coupled to the first RF circuit and the second RF circuit. Then, the second RF circuit is configured to avoid RF signal collisions with the first RF circuit. An apparatus where two RF devices are co-located without causing interference for each other is also provided. | 10-17-2013 |
20130273950 | INTERFERENCE SUPPRESSION METHOD AND APPARATUS IN MULTI-POINT COORDINATED TRANSMISSION SYSTEM - The present invention provides an apparatus for suppressing interference in a coordinated multi-point CoMP transmission system, comprising: frame configuration conflicting detection unit configured to detect conflicting frame configurations; frame configuration conflicting notification unit configured to give a notification of conflicting frame configurations; and interference suppression unit configured to suppress interference between a first CoMP cluster and a second CoMP cluster that are adjacent in the CoMP transmission system when detecting conflicting frame configurations. The present invention further provides a method of suppressing interference in a coordinated multi-point CoMP transmission system. The present invention provides a novel solution that may suppress inter-cell UL/DL ICI by adopting coordinated beamforming (CBF) and coordinated scheduling (CS) in a TDD CoMP system, while maintaining sound implementation of CoMP and flexibility of frame configuration in the TDD system. | 10-17-2013 |
20130281143 | METHOD AND APPARATUS FOR INTERFERENCE-AWARE WIRELESS COMMUNICATIONS - In accordance with an example embodiment of the present invention, a method comprises receiving at a controlling node an interference measurement report from a first node; determining from a transmission schedule a transmit activity by a second node during an interference measurement period associated with the interference measurement report; estimating a contributing interference from the transmit activity by the second node during the measurement period; and causing an adjustment to the contributing interference. | 10-24-2013 |
20130288727 | COMMUNICATION DEVICES AND METHODS FOR OPERATING A COMMUNICATION DEVICE - A communication device is described comprising a receiver configured to receive a radio signal from another communication device via a communication channel; a detector configured to detect the presence of an impairment of the communication channel; a determiner configured to determine a type of the impairment of the communication channel; and a transmitter configured to transmit an indication of the type of the impairment of the communication channel to the other communication device. | 10-31-2013 |
20130295976 | METHOD AND APPARATUS FOR REDUCING INTERFERENCE IN A WIRELESS SYSTEM - Techniques for performing interference reduction are described. In a design of an apparatus, system, method and computer program of the present disclosure, a mobile device may at least partially identify an interfering resource using at least energy received from the interfering resource, and the mobile device may report the interfering resource to a base station for mitigation of the interference. The identifying may include extracting, from the received energy, information distinguishing the interfering resource from other devices. The interfering resource may interfere in one of a communication time slot, and a communication frequency. | 11-07-2013 |
20130303214 | METHODS AND APPARATUS FOR IN-DEVICE COEXISTENCE DETECTION AND MITIGATION - Methods and apparatus for detecting and mitigating interface conditions at a multi-radio device. In one embodiment, a multi-radio device monitors and detects an in device-coexistence (IDC) interference condition which is, for example, caused by concurrent operation of radios. In response, the device notifies a network entity (e.g., a Long Term Evolution (LTE) eNodeB) of the detected IDC condition. Upon receiving the notification of the IDC condition, the network entity may implement or invoke a mitigation scheme in order to reduce the amount of IDC experienced at the client device. | 11-14-2013 |
20130303215 | METHOD AND APPARATUS PROVIDING IN-DEVICE CO-EXISTENCE SIGNALING - In accordance with an example embodiment of the present invention, an apparatus, method and computer storage product are disclosed which compose a report at an apparatus having at least one network radio and at least one other radio, the report comprising in-device coexistence related information that combines information descriptive of potential and on-going interference to the at least one other radio as two orthogonal components comprised of power domain information and time domain information and transmit the report to a network station with which the apparatus communicates using the at least one network radio. | 11-14-2013 |
20130303216 | Base Station Calibration - A method for calibrating a base station including a plurality of antennas is provided. First correction information is received from a system module, the correction information determined from first calibration of the base station Signals are received at a radio frequency module from at least one antenna of the base station Second correction information is determined on the basis of the received signals and the first correction information. | 11-14-2013 |
20130303217 | METHODS AND APPARATUS FOR COORDINATION OF SENDING REFERENCE SIGNALS FROM MULTIPLE CELLS - Methods and apparatus for coordination of sending reference signals in wireless network are disclosed. A network node may select a cell ID based on a measurement of adjacent cells so as to mitigate interference. A network node may communicate information to another network node to control transmitted resources in a protected interval so as to measure channel characteristics. | 11-14-2013 |
20130310090 | Method and Apparatus for Reduction of Intermodulation Products - Interference to a received signal is reduced in a wireless network, the interference comprising intermodulation products of at least a first signal and a second signal. Delayed interference signals comprising simulated intermodulation products are generated on the basis of the first signal and the second signal using a range of differing delay values and each of the delayed interference signals is correlated with the received signal to produce data representing a correlation for each delayed interference signal. At least one delay value is selected in dependence on a the data representative of the correlations and an interference signal comprising simulated intermodulation products generated from the first signal and the second signal using the at least one delay value is combined with the received signal. | 11-21-2013 |
20130310091 | Outer Loop Link Adaptation for Device Resumption - Outer loop link adaptation for device resumption. A user equipment (UE) and base station (BS) may be in communication in a first network (e.g., an LTE network). Communication between the UE and the BS may be interrupted, e.g., due to a long fading environment, the UE tuning away to a second network (e.g., a CDMA network). Accordingly, the measured error rate may increase dramatically. After resumption from the interruption, a negative offset may be applied to a reported SINR value from the UE due to the previous increase in error rate. Upon improvement in the error rate, a larger, positive offset adjustment may be added to the negative offset, allowing the estimated SINR to return to reported SINR more quickly. Additionally, the error rate estimation may be adjusted to converge to a more recently measured more quickly by decreasing a feedback filter coefficient. | 11-21-2013 |
20130310092 | Outer Loop Link Adaptation for Device Resumption - Outer loop link adaptation for device resumption. A user equipment (UE) and base station (BS) may be in communication in a first network (e.g., an LTE network). Communication between the UE and the BS may be interrupted, e.g., due to a long fading environment, the UE tuning away to a second network (e.g., a CDMA network). Accordingly, the measured error rate may increase dramatically. After resumption from the interruption, a negative offset may be applied to a reported SINR value from the UE due to the previous increase in error rate. Upon improvement in the error rate, a larger, positive offset adjustment may be added to the negative offset, allowing the estimated SINR to return to reported SINR more quickly. Additionally, the error rate estimation may be adjusted to converge to a more recently measured more quickly by decreasing a feedback filter coefficient. | 11-21-2013 |
20130310093 | NON-PARAMETRIC POWER SPECTRAL DENSITY (PSD) MAP CONSTRUCTION - This disclosure describes techniques for constructing power spectral density (PSD) maps representative of the distribution of radio frequency (RF) power as a function of both frequency and space (geographic location). For example, the disclosure describes techniques for construction PSD maps using non-parametric basis pursuit form of signal expansion. | 11-21-2013 |
20130316750 | CHARACTERIZING CABLE LEAKAGE INTERFERENCE PRIORITIES ON LTE - A method and structure for conforming to cable leakage compliance level requirements includes calculating, using a processor on a computer, a priority of repairs for cable leakage over a cable operator service area. A result of the priority calculation is provided, thereby permitting higher priority leaks to be identified and repaired. The calculating of priority includes storing geographical locations of cell towers affecting a service area being evaluated, receiving data related to cable leakage sources, receiving data related to wireless service quality, if available, and exercising, using the processor on the computer, a prioritizing algorithm that calculates a relative severity of each cable leakage source. | 11-28-2013 |
20130324172 | APPARATUS AND METHOD FOR PERFORMING MEASUREMENT REPORT CONSIDERING IN-DEVICE COEXISTENCE INTERFERENCE - The present invention relates to an apparatus and a method for performing measurement reporting considering in-device coexistence interference. The present invention provide a user equipment transmitting a measurement report in a wireless communication system, comprising an interference detection unit, an assistant information generation unit, a measurement controller and a transmitter According to the present invention, a measurement procedure can be clearly defined in an interference delicate band where in-device coexistence interference occurs and scheduling restrictions on an eNodeB due to measurement reporting about an interference delicate band can be reduced. | 12-05-2013 |
20130331136 | Method And Apparatus For Coordinated Beamforming - Various methods and devices are provided to improve wireless communications. In one method, a need for additional wireless service in a target area is detected ( | 12-12-2013 |
20130331137 | METHODS AND APPARATUS FOR COEXISTENCE OF WIRELESS SUBSYSTEMS IN A WIRELESS COMMUNICATION DEVICE - Methods and apparatus to mitigate interference among multiple wireless subsystems of a wireless communication device are described. A host processor obtains configurations for a plurality of wireless subsystems and evaluates whether potential or actual coexistence interference exists between two or more of the wireless subsystems. The host processor provides configuration information and link quality reporting parameters to and obtains link quality reports from at least two wireless subsystems. When link quality for at least one wireless subsystem fails a set of link quality conditions, the host processor adjusts data requirements for applications that communicate through one or more of the wireless subsystems and/or adjusts radio frequency operating conditions for one or more of the wireless subsystems to mitigate interference among the wireless subsystems. | 12-12-2013 |
20130337855 | INTELLIGENT TRANSPORTATION SYSTEMS DEVICE - An Intelligent Transportation Systems (ITS) device is described. The ITS device ( | 12-19-2013 |
20130337856 | METHODS AND SYSTEMS FOR SIGNAL FINGERPRINTING - Systems and methods for modulating a telepowering signal in a downlink communication. Embodiments of the present invention provide a fingerprint module to generate a fingerprint signal that can be modulated with a telepowering signal for communication by a transmission module in a downlink communication. The fingerprint signal is reflected by a wayside equipment module and received by the transmission module to enable an additional communication other than the downlink communication and an uplink communication. | 12-19-2013 |
20130344908 | METHOD AND APPARATUS FOR INTERFERENCE PROCESSING IN WIRELESS COMMUNICATION SYSTEM - A method and apparatus process interference in a wireless communication system. A method of a master node for interference processing in a wireless communication system includes determining an interference-alignment dimension that is to perform interference alignment, distributing a dimension remaining after determining the interference-alignment dimension, determining a non-interference-alignment dimension not performing the interference alignment, determining at least one matrix for interference alignment of the plurality of transmitters and the plurality of receivers, and transmitting the determined at least one matrix to at least one of the plurality of transmitters and the plurality of receivers. | 12-26-2013 |
20130344909 | COORDINATED MULTIPOINT (CoMP) INTERFERENCE NOISE ESTIMATION - A noise and interference estimator and method for estimating noise and interference in a coordinated multipoint (CoMP) system at a mobile communication device is disclosed. The method comprises the operation of receiving a channel state information reference signal (CSI-RS) from a serving transmitting station at a user equipment (UE). Resource elements (REs) occupied by the CSI-RS of the serving transmitting station are muted on cooperating transmitting stations in the CoMP system. The operation of estimating a non-cooperating interference noise covariance matrix from the CSI-RS transmitted by the serving transmitting station follows. | 12-26-2013 |
20140018114 | METHOD FOR SWITCHING SERVICE OF MANAGEMENT DEVICE SERVING NETWORK OR DEVICE - Disclosed is a method of switching between services of a television band device (TVBD) network or device of an apparatus including a coexistence manager (CM), including: transmitting, by the CM, a request for switching between services of the TVBD network or device to the TVBD network or device; and receiving, by the CM, a response with respect to the request from the TVBD network or device. Here, the services include an information service obtaining neighbor information from the CM by the TVBD network or device and a management service providing measurement results to the CM by the TVBD network or device, and the response includes an indicator indicating whether or not the request has been successfully processed. | 01-16-2014 |
20140018115 | METHOD AND SYSTEM FOR REDUCING INTER-CELL INTERFERENCE USING INTRA-ENB DOWNLINK COORDINATED MULTIPOINT SERVICES - A system and method of cancelling downlink inter-channel interference between a first selected UE in one sector of a cell and a second selected UE in a second sector of said cell by using intra-eNB DL CoMP is described. UEs which are affected by ICI are identified in sectors which are adjacent to each other in the cell. A downlink CoMP operational set is formed for the identified UEs. Channel matrix blocks are estimated for the first and second selected UEs. The channel matrix blocks are representations of the channel characteristics between the first and second UE, in their respective sectors and the serving base station. The estimated channel matrix blocks are then loaded into a cross-sector channel block matrix. The inverse values of the channel matrix blocks are then calculated to form a sector specific cross-sector pre-coding matrix which is used to enable interference cancellation. | 01-16-2014 |
20140018116 | DEVICE-EMPOWERED RADIO RESOURCE SYSTEM - A system and method are provided for mitigating interference between wireless access points (APs). A user equipment (UE) device uses a first set of radio resources to wirelessly communicate with a first AP and a second set of radio resources to wirelessly communicate with a second AP. The UE device then uses the first and second radio resources to communicate cooperation data between the first and second access points to mitigate interference thereinbetween. | 01-16-2014 |
20140018117 | COEXISTENCE MANAGEMENT SYSTEM FOR MEASURING CHANNEL INFORMATION BETWEEN SPECTRUM SHARING DEVICES AND METHOD THEREOF - Provided are a coexistence management system for measuring channel information between spectrum sharing devices and a method thereof. The coexistence management system for measuring channel information between spectrum sharing devices according to the exemplary embodiment of the present invention includes: a plurality of coexistence enablers (CEs) which is provided for each of the plurality of white space objects (WSOs) having at least one measurement capability of measuring channel information on an operation channel that is being used; a coexistence manager (CM) which is linked with at least one CE within a group to confirm measurement capability of a corresponding WSO and receives channel information on the operation channel from one or more WSOs within another neighboring groups according to the confirmed result; and a coexistence discovery and information server (CDIS) which registers at least one measurement capability for each of the plurality of WSOs. | 01-16-2014 |
20140018118 | User Equiptment and Associated Method - It is presented a user equipment comprising: a processor; and an instruction memory. The instruction memory stores instructions that, when executed, causes the user equipment to: receive at least one command from a network node; obtain at least a first measurement of channel state information and a second measurement of channel state information as a response to the at least one command; determine whether an interference corresponding to the second measurement of channel state information occurs during a data reception phase; and decode received signals, when an interference corresponding to the second measurement of channel state information occurs, based on the second measurement of channel state information. | 01-16-2014 |
20140018119 | METHOD, APPARATUS AND SYSTEM FOR INTERFERENCE MANAGEMENT - Disclosed in the present invention are a method, an apparatus and a system for interference management. In the embodiments of the present invention, a Home NodeB (HNB) registers in a macro cell in advance, so that a NodeB Controller (NBC) knows the information of a potential interference source HNB beforehand. Thus simply through a normal measurement and a report subsequently performed by a terminal, an interference source HNB can be found easily, and an interference management of the interference source HNB also can be performed. The solution can avoid the situation in the prior art that the interference management is performed necessarily with a cell identity of the interference source HNB obtained by the terminal. With the application of the solution, the interference management to the HNB can be performed timely and effectively and the interference experienced by the terminal from the HNB is reduced. | 01-16-2014 |
20140024402 | SYSTEMS AND METHODS FOR A SELF-OPTIMIZING DISTRIBUTED ANTENNA SYSTEM - Systems and methods for a self-optimizing distributed antenna system are provided. In certain embodiments, a distributed antenna system comprises a host unit configured to control the operation of the distributed antenna system; and a plurality of remote units coupled to the host unit. In at least one embodiment, a remote unit in the plurality of remote antenna units comprises a scanning receiver configured to receive signals in a plurality of frequency bands; at least one transceiver configured to transmit and receive signals in a frequency band in the plurality of frequency bands; and a remote unit controller configured to control an uplink gain level of the at least one transceiver and tune the scanning receiver to a frequency band in the plurality of frequency bands. | 01-23-2014 |
20140038651 | Method and System for Using a Minimum Sensitivity Threshold for Receiving Wireless Signals - A method includes computing a minimum sensitivity threshold value for a particular wireless device, configuring the particular wireless device to receive wireless signals with a signal strength higher than the minimum sensitivity threshold value, distributing the minimum sensitivity threshold value to other wireless devices, and configuring the other wireless devices based on the minimum sensitivity threshold value for the particular wireless device. | 02-06-2014 |
20140038652 | PROCESS AND DEVICE FOR DETECTION OF A FREQUENCY SUB-BAND IN A FREQUENCY BAND AND COMMUNICATIONS EQUIPMENT COMPRISING SUCH A DEVICE - The invention relates to a process for detection of a signal in a frequency sub-band of a frequency band of an acquired signal y(t), the process comprising:
| 02-06-2014 |
20140038653 | RADIO BASE STATIONS AND METHODS THEREIN FOR HANDLING INTERFERENCE AND SCHEDULING RADIO RESOURCES ACCORDINGLY - Embodiments herein relate to a first radio base station ( | 02-06-2014 |
20140045542 | TRANSMISSION POWER CONTROL METHOD, COMMUNICATION DEVICE AND PROGRAM - There is provided a method for controlling a transmission power in a second communication service making secondary usage of a spectrum assigned to a first communication service, with use of any node of one or more secondary usage node that transmits a radio signal of the second communication service, comprising the steps of: acquiring an acceptable interference power allocated to the second communication service; calculating a total sum of interference power levels on the first communication service based on transmission powers respectively required for the one or more secondary usage node; and excluding any secondary usage node of the one or more secondary usage node from allocation of the transmission power when the calculated total sum of interference power levels is larger than the acceptable interference power. | 02-13-2014 |
20140051467 | Spectrum Allocation for Base Station - Embodiments include processes, systems, and devices that allow a white space base station to request available frequency ranges for white space transmission in a local area. A white space finder service models a primary user device's transmission signal propagation area using terrain data associated with the local area of the primary user device. The white space finder service also determines, based on the location of the white space base station and the modeled propagation area, one or more locally available, non-interfering frequency ranges and provides them to the white space base station. The white space base station compares the provided frequency ranges to policies and selects one or more of the available frequencies that accommodate the policies. The white space base station also maps the transmission frequency ranges to virtual frequency ranges for transmission by a software-defined radio employing spectrum virtualization. | 02-20-2014 |
20140051468 | METHOD AND DEVICE FOR MAINTAINING THE PERFORMANCE QUALITY OF A COMMUNICATION SYSTEM IN THE PRESENCE OF NARROW BAND INTERFERENCE - A system that incorporates teachings of the subject disclosure may include, for example, a method for analyzing a wide frequency band with respect to signal power levels in specified narrow frequency bands, detecting narrow band signal power levels received in the specified narrow frequency bands, determining an average composite wideband power level from the narrow band signal power levels, and determining an adaptive threshold from the narrow band signal power levels for detecting narrow band interferers in the wide frequency band. Other embodiments are disclosed. | 02-20-2014 |
20140057668 | WIRELESS COMMUNICATION APPARATUS, WIRELESS COMMUNICATION METHOD, COMPUTER PROGRAM, AND WIRELESS COMMUNICATION SYSTEM - A wireless communication apparatus includes: a first wireless communication section performing wireless communication on the basis of a first communication mode; a second wireless communication section performing wireless communication on the basis of a second communication mode using a different frequency band from the first communication mode; a beam learning signal generation section generating a beam learning signal for specifying a beam pattern at the time of the communication based on the second communication mode and transmitting the beam learning signal from the second wireless communication section; a response information acquisition section acquiring response information responding to the transmitted beam learning signal; and a preliminary information generation section generating preliminary information so as not to cause interference among a plurality of wireless communications using the second communication mode on the basis of the response information and transmitting the preliminary information from the first wireless communication section. | 02-27-2014 |
20140057669 | MOBILE COMMUNICATION SYSTEM AND MOBILE STATION - To reduce the number of cells in which a “Measurement Subframe Pattern” is broadcasted, in the mobile communication method according to the present invention, a radio base station eNB# | 02-27-2014 |
20140066113 | Bi-Directional Training in Dual Networks System - A method and apparatus for bi-direction training in D2D/cellular networks. An embodiment method includes sending training symbols to sense interference from the cellular UEs, calculating an interference subspace from the cellular UE to each of the D2D UEs, calculating an orthogonal projection matrix based on the interference subspace calculated, and iteratively updating receive filters through forward training and transmit beamformers through backward training after the orthogonal projection matrix is calculated to align the D2D UEs. In an embodiment, training symbols are sent to sense interference from the cellular UE. | 03-06-2014 |
20140066114 | COMMUNICATION SYSTEM WITH REPEAT-RESPONSE PROCESSING MECHANISM AND METHOD OF OPERATION THEREOF - A communication system includes: a signal identification module configured to receive a repeat response for receiving the repeat response associated with a receiver signal; a signal analysis module, coupled to the signal identification module, configured to determine a serving data, a serving channel estimate, an interference channel estimate, or a combination thereof an interference data from the repeat response with an interference-aware processing mechanism; a combining module, coupled to the signal analysis module, configured to combine the repeat response and the receiver signal based on the serving data, the serving channel estimate, the interference channel estimate, the interference data, or a combination thereof; and a decoding module, coupled to the combining module, configured to generate a replication data based on combining the repeat response and the receiver signal based on the serving data, the serving channel estimate, the interference channel estimate, the interference data, or a combination thereof for communicating with a device. | 03-06-2014 |
20140073368 | Downlink Interference Coordination in a Radio Communication Network - An aggressor base station ( | 03-13-2014 |
20140080529 | APPARATUS, METHOD, AND SYSTEM FOR UPLINK POWER CONTROL IN A HETEROGENEOUS WIRELESS COMMUNICATION NETWORK - Apparatus and methods are disclosed for power control of uplink transmissions by a user equipment in a way that can reduce interference to neighbor cells. Various aspects of the disclosure decouple the power control for uplink data transmissions from the power control for uplink for a control channel transmissions. For example, one type of power control command may be utilized to control the power the UE utilizes to transmit data channels such as the DPDCH and/or the E-DCH (e.g., the E-DPDCH and the E-DPCCH). Further, another type of power control command may be utilized to control the power the UE utilizes to transmit control channels such as the HS-DPCCH. In this way, the uplink data channels, which can cause substantial interference to neighbor cells, can be power controlled by those neighbor cells to reduce that interference. Moreover, the control channel corresponding to the downlink data transmissions can be controlled by the downlink serving cell, thus ensuring reliable feedback corresponding to those downlink transmissions. | 03-20-2014 |
20140087776 | CONTROLLING WIRELESS NETWORK SIGNALS - A device may receive, from a browser, a message requesting that a first signal from a first base station of a first wireless network be attenuated in accordance with a first attenuation value. The device may set an attenuation level of the first wireless signal in accordance with the first attenuation value in response to the message. The first signal attenuated by the first attenuation value is wirelessly transmitted to a first user device at a first area shielded from signals wirelessly transmitted to a second user device at a second location. | 03-27-2014 |
20140094204 | Uplink Power Control for Machine Type Communication Devices - An access node is configured to adapt uplink power control procedures based on the device attributes of a wireless device. The device attributes may, for example be the mobility, energy profile, or characteristic traffic pattern of the wireless device. The adaptive uplink power control procedure may be used to minimize or reduce power consumption, to improve resource utilization efficiency, or to reduce interference levels. | 04-03-2014 |
20140094205 | METHOD FOR MANAGING POTENTIALLY DISRUPTIVE NODES IN A MOBILE AD-HOC NETWORK - A method for managing node communications in a mobile ad-hoc network is provided where at least a node in the said network performs the following steps: identifying if it is a Potentially Disruptive Node (PDN) or a non-PDN node, a PDN node being a node that has a number of connected 1-hop neighbour nodes greater than a predetermined value K; when the node is identified as a PDN node, selecting a subset of its 1-hop neighbour nodes, the selected nodes being the only 1-hop neighbour nodes that are allowed to communicate directly with the PDN node, the selected nodes being called Bridge Nodes (BN), non-BN nodes being called Regular Nodes (RN), the said RN nodes being able to communicate with PDN nodes via the selected BN nodes. | 04-03-2014 |
20140099982 | MODAL ADAPTIVE ANTENNA FOR MOBILE APPLICATIONS - An adaptive antenna system for mobile applications where the mode of the antenna is optimized dynamically to optimize link quality with intended sources. Interfering signals are suppressed by mode selection to minimize link quality by altering antenna radiation pattern characteristics. A single driven antenna is configured such that the radiating mode can be dynamically adjusted and optimized based on link metrics. | 04-10-2014 |
20140099983 | Smart Antenna With Multiple Round Selection - A smart antenna system for communicating wireless signals between a mobile device and a plurality of fixed base stations using different channels and beams. The system comprises a control subsystem, a radio transceiver and an antenna subsystem, providing a plurality of beams. Each beam has a main lobe, one or more nulls, and one or more lateral and back lobes with at least some attenuation, so as to reduce interference. The system performs scanning of different combinations of base stations, channels and beams using one or more test links established with one or more of the fixed base stations. The test links use at least some of the different channels and the different beams, select a first combination of base station, channel and beam based on the scanning, and establish a first operating link for transmitting a wireless signal to the selected base station using the selected channel and beam. | 04-10-2014 |
20140106801 | TRANSCEIVER OPERATING IN A WIRELESS COMMUNICATIONS NETWORK, A SYSTEM AND METHOD FOR TRANSMISSION IN THE NETWORK - The embodiments provide a transceiver, a method and a system for transmission of one or more signals in a wireless communication network. The transceiver according to the described embodiments being capable of collecting channel characteristics based on a received signal from another transceiver in the network; predicting a transmission mode for a subsequent signal transmission on the basis of said collected channel characteristics by determining an interference level of said received signal and estimating an interference level for the subsequent transmission based on the determined interference level and one or more parameters of the received signal, wherein the transmission mode for the subsequent transmission is predicted based on the estimated interference level. The transceiver being further configured to adapt transmission parameters of one or more subsequent transmissions based on the predicted transmission mode. | 04-17-2014 |
20140113669 | Method of Handling Beamforming Feedback in a Wireless Communication System and Related Communication Device - A method of handling a beamforming feedback for a base station of the wireless communication system comprises receiving a message comprising information of an interference caused by a communication between the base station and a communication device of the wireless communication system; determining an accuracy level of channel information according to the information of the interference; controlling the communication device to transmit the channel information with the accuracy level to the base station; and performing a beamforming according to the channel information to communicate with the communication device, after receiving the channel information transmitted by the communication device. | 04-24-2014 |
20140120967 | MITIGATING INTERFERENCE FROM WIRELESS EQUIPMENT - A first wireless access network node determines whether a first wireless equipment is potentially an interferer of wireless communication of a second wireless equipment in a domain of a second wireless access network node, where the first wireless equipment is in a domain of the first wireless access node. In response to determining that the first wireless equipment is potentially the interferer of the wireless communication of the second wireless equipment, configuration information is sent to the second wireless access network node to allow the second wireless access network node or the second wireless equipment to detect an interference from the first wireless equipment and to initiate performance of an interference mitigation procedure with respect to the interference from the first wireless equipment. | 05-01-2014 |
20140120968 | Frequency Tunable Transmit/Receive (Tx/Rx) Antenna Switch - A frequency tunable transmit/receive (Tx/Rx) antenna switch uses a tuned PIN diode RF switch topology (e.g. shunt, series or series-shunt). Frequency tunability may be provided for either a transmit or a receive port (or both) that is tuned by a quarter-wavelength transmission line. The quarter-wavelength (λ | 05-01-2014 |
20140120969 | MULTI-RADIO COEXISTENCE - A method and apparatus relate to coexistence of multiple RF subsystems on a communication device. An apparatus may include a plurality of radio frequency (RF) subsystems configured to receive or transmit communication signals; and an interference table indicative of zones of interference among the multiple RF subsystems, the zones of interference being based on RF measurements. At least one of the RF subsystems comprises a coexistence module configured to communicate coexistence-related messages with of the other RF subsystems, the coexistence-related messages being based on the zones of interference. | 05-01-2014 |
20140120970 | METHOD, SYSTEM AND DEVICE FOR TRIGGERING AND PERFORMING SPECTRUM SENSING - The embodiments of the present application relate to the technical field of wireless communications, and in particular to a method, system and device for triggering and performing spectrum sensing, used for solving the problem in the prior art that if the sensing period is set too long, a decline of service quality between an authorization system and a cognitive system or even a network paralysis will be caused due to interference; and if the sensing period is set too short, an increase in power consumption of devices and a waste of spectrum resources will be caused. The method for performing spectrum sensing in the embodiments of the present application includes: a sensing node judging whether or not the channel quality has declined to the requirement for performing in-band spectrum sensing; and after determining that the channel quality has declined to the requirement for performing in-band spectrum sensing, the sensing node performing in-band spectrum sensing. By way of applying the embodiments of the present application, the problems of decline of service quality between an authorization system and a cognitive system or even a network paralysis due to interference caused by setting the sensing period too long, or an increase in power consumption of devices and a waste of spectrum resources caused by setting period too short, can be avoided. | 05-01-2014 |
20140128115 | METHODS AND DEVICES RELATED TO EFFECTIVE MEASUREMENTS - Systems and methods related to effective measurements in a cellular communications network are disclosed. In one embodiment, a network node obtains a reference measurement performed by a measuring node, where the reference measurement contains one or more interference components. The reference measurement may be, for instance, a reference signal quality measurement or a reference signal power measurement. The network node then mitigates at least one of the interference components contained in the reference measurement to thereby provide an effective measurement for the measuring node. In one embodiment, the network node mitigates the at least one interference component by obtaining a compensation value for mitigating the at least one interference component and applying the compensation value to the reference measurement to thereby provide the effective measurement. | 05-08-2014 |
20140135048 | METHOD, APPARATUS, AND COMPUTER PROGRAM PRODUCT FOR LOCATION BASED QUERY FOR INTERFERER DISCOVERY IN COEXISTENCE MANAGEMENT SYSTEM - Method, apparatus, and computer program product embodiments are disclosed for managing coexistence of secondary users in RF spectrum. An example embodiment includes receiving, by a coexistence manager, information indicating that a candidate wireless network served by another coexistence manager may interfere with a wireless network served by the coexistence manager; determining a location related to the wireless network served by the coexistence manager; transmitting a request message to the other coexistence manager, indicating the location and requesting an estimate of a transmission signal level at the location caused by the candidate wireless network; receiving from the other coexistence manager, a response message including information indicating an estimated transmission signal level at the location caused by the candidate wireless network; and determining whether the candidate wireless network interferes with the wireless network served by the coexistence manager based on the received estimated transmission signal level. | 05-15-2014 |
20140135049 | CONTROL STATION DEVICE, CENTRAL CONTROL STATION DEVICE, TERMINAL DEVICE, COMMUNICATION SYSTEM AND COMMUNICATION METHOD - A control station device performs communications controlled by a central control station device. The control station device acquires information related to a control station device that becomes an interference source to a coverage area controlled by the control station device. The control station device notifies the central control station device of the information related to the control station device that becomes the interference source. The control station device acquires, from the central control station device, information related to a possibility of communications thereof. In this way, the control station device is provided that forms the communication system excellent in frequency usage efficiency based on interference source information and the like indicating an inter-cell interference status measured at each cell. | 05-15-2014 |
20140141824 | COMMUNICATING INFORMATION RELATING TO IN-DEVICE COEXISTENCE INTERFERENCE - A user equipment calculates a parameter based on a power of in-device coexistence (IDC) interference. The user equipment sends, to a network node, the parameter for use in configuring a threshold relating to the IDC interference. | 05-22-2014 |
20140141825 | COMMUNICATING IN-DEVICE COEXISTENCE INTERFERENCE ASSISTANCE INFORMATION - A user equipment receives control information relating to selecting one or more of plural options to use for delivery of assistance information including at least one parameter relating to setting a threshold for in-device coexistence (IDC) interference. The user equipment sends, to the wireless access network node, a message containing the IDC interference assistance information, according to the control information. | 05-22-2014 |
20140155113 | METHOD AND APPARATUS FOR FEEDBACK TRANSMISSION IN WIRELESS COMMUNICATION SYSTEM - A method for operating a terminal in a wireless communication system is provided. The method includes determining a candidate group of serving distributed small base stations and determining feedback bits for maximizing an expected average rate when a service is provided from a distributed small base station that belongs to the candidate group of serving distributed small base stations. | 06-05-2014 |
20140162712 | SYSTEM PROVIDING REDUCED INTERMODULATION DISTORTION - A system divides a signal into first and second portions and transmits the first and second portions through different signal paths between a first port and a second port. Each of the signal paths comprises an amplifier arranged in sequence with a passive device. Phase shifters may be included in each of the signal paths to produce cancellation of intermodulation products by destructive interference. | 06-12-2014 |
20140187276 | SYSTEMS AND METHODS FOR REDUCING INTERFERENCE IN DATA COMMUNICATION NETWORKS - A computer-implemented method for calculating interference reducing parameters for cancelling wireless signal interference within a data communication network, comprising: per each of a plurality of antennas of a multi-sector hub communicating with a data communication network and with a corresponding transceiver of a plurality of distant transceivers: calculating a plurality of calibration factors based on values extracted from sequential transmission and reception of predetermined signals between each of the plurality of antennas of the multi-sector hub; calculating at least one receive interference cancellation parameter, to isolate desired signals transmitted by the corresponding distant transceiver from the undesired interference signals transmitted by other non-corresponding distant transceivers; calculating at least one transmit interference parameter for each non-corresponding antenna of the hub, based on the calculated receive interference cancellation parameters and the calibration factors; and generating the interference parameters for applying during operation of the multi-sector hub to generate interference cancellation signals. | 07-03-2014 |
20140187277 | METHOD, DEVICE, AND SYSTEM FOR PROCESSING COMMUNICATIONS SYSTEM SIGNAL - The present invention provides a method, a device, and a system for processing a communications system signal. The method includes: acquiring, by a communications system of a first standard, a first message, where the first message carries a signal strength, sent by a communications system of a second standard, on a frequency where interference of the communications system of the second standard on the communications system of the first standard exists; and performing, by the communications system of the first standard, according to the signal strength, filtering processing for a signal to be processed of the communications system of the first standard. In embodiments of the present invention, interference can be reduced and receiving performance can be improved. | 07-03-2014 |
20140206406 | APPARATUS, SYSTEM AND METHOD OF ESTABLISHING A WIRELESS BEAMFORMED LINK - Some demonstrative embodiments include devices, systems and/or methods of establishing a wireless beamformed link. For example, an apparatus may include a wireless communication controller to control a first wireless communication device to communicate millimeter-wave (mmWave) signals with a second wireless communication device over a mmWave frequency band, the mmWave signals including signals transmitted according to a plurality of different transmit (Tx) beamforming settings, the wireless communication controller is to control the first wireless communication device to communicate feedback information, which is based on the mmWave signals, over a non-mmWave frequency band, and to control the first wireless communication device to establish with the second wireless communication device a beamformed link over the mmWave frequency band, the beamformed link using a Tx beamforming setting, which is determined based on the feedback information. | 07-24-2014 |
20140213310 | DYNAMIC INTERFERENCE AVOIDANCE IN INTEGRATED MULTI-RADIO ACCESS TECHNOLGIES (RAT) HETEROGENEOUS NETWORKS - A system provides dynamic interference avoidance in integrated multi-radio access technology (RAT) heterogeneous networks (Het-Nets). A multi-mode user equipment accesses mobile communications services using RATs. An integrated node provides a primary cell and at least one secondary ceil to the multi-mode user equipment. Initial radio access technologies (RATs) are assigned to the multi-mode user equipment from among a plurality of RATs for use by the multi-mode user equipment. Quality metrics are collected across the plurality of RATs. RAT assignments are re-evaluated based on the collected quality metrics. To provide dynamic interference mitigation in muiti-RAT Het-Nets, RAT assignments are periodically repartitioned from among the plurality of RATs for use by the multi-mode user equipment based on the re-evaluation of RAT assignments using the collected quality metrics. | 07-31-2014 |
20140221028 | FAST DETECTION OF COLLOCATED RF JAMMERS FACILITATING OPTIMIZED GAIN SETTING SELECTION OF FRONT-END RECEIVER AMPLIFIERS - In collocated radios, interference is mitigated to permit concurrent radio operation. In response to detection of imminent transmission of interfering wireless (i.e., RF jammer) signals, gain settings of one or more stages of front-end receiver amplifiers may be quickly configured to permit concurrent frequency division operation instead of consecutive time-division operation. This expansion of concurrent operation may improve communication bandwidth and/or may produce reliable, consistent results. Gain control responsive to detection of imminent RF jamming may maintain amplification in a linear range where interference can be filtered out. Receiver gain may be shifted from a default high gain or high sensitivity setting to lower gain to maintain integrity of a signal of interest (SoI), which avoids clipping, distortion and unwanted products caused by a high power jamming signal that could otherwise make it impossible to recover the SoI. This mitigation technique supplements and/or replaces other interference mitigation techniques. | 08-07-2014 |
20140221029 | METHODS AND APPARATUS FOR WIRELESS COEXISTENCE BASED ON TRANSCEIVER CHAIN EMPHASIS - Methods and apparatus for reduction of interference between a plurality of wireless interfaces. In one exemplary embodiment, a device having a first (e.g., Wi-Fi) interface and a second (e.g., Bluetooth) interface monitors interference between its interfaces. A reduction in transmit power of the Wi-Fi module causes a disproportionately larger reduction in undesirable interference experienced at the Bluetooth antennas. For example, when the Bluetooth interface detects interference levels above acceptable thresholds, the Wi-Fi interface adjusts operation of one or more of its transmit chains based on various conditions such as duty cycle, Received Signal Strength Indication (RSSI), etc. Various embodiments of the present invention provide simultaneous operation of WLAN and PAN interfaces, without requiring time division coexistence, by reducing power on a subset of interfering antennas. | 08-07-2014 |
20140243029 | SYSTEMS AND METHODS FOR A LONG-TERM EVOLUTION NETWORK DEVICE - A system and method for a LTE network device is provided. The system includes a first signal processing center configured to obtain a plurality of metrics from an LTE network device. The first signal processing center includes a plurality of processors configured to calculate interference based on the plurality of metrics. The signal processing system further includes a second signal processing center configured to receive the calculated interference from the first signal processing center. | 08-28-2014 |
20140243030 | METHOD AND APPARATUS FOR CANCELLING AN INTERFERENCE IN WIRELESS COMMUNICATION SYSTEM - A method and an apparatus for cancelling interference in a wireless communication system are provided. The method includes acquiring interference signal information on a reception signal received from a base station based on a preconfigured constellation set, and cancelling an interference signal from the reception signal by using the acquired interference signal information. Accordingly, reception performance in a cell edge can be improved by acquiring dominant interference signal information. | 08-28-2014 |
20140248916 | SPECTRUM CONTROL SYSTEM, DATABASE, SPECTRUM CONTROL METHOD, AND NON-TRANSITORY COMPUTER-READABLE MEDIUM STORING SPECTRUM CONTROL PROGRAM - A spectrum control system according to the present invention is a spectrum control system that evaluates whether or not to allow a second wireless communication system to perform secondary use on a frequency band that is allowed to be preferentially used by a first wireless communication system, and includes a request distinguish unit ( | 09-04-2014 |
20140256370 | PROCESS AND DEVICE FOR DETECTION OF A FREQUENCY SUB-BAND IN A FREQUENCY BAND AND COMMUNICATIONS EQUIPMENT COMPRISING SUCH A DEVICE - The invention relates to a process for detection of a signal in a frequency sub-band of a frequency band of an acquired signal y(t), the process comprising:
| 09-11-2014 |
20140256371 | METHOD AND DEVICE FOR MAINTAINING THE PERFORMANCE QUALITY OF A COMMUNICATION SYSTEM IN THE PRESENCE OF NARROW BAND INTERFERENCE - A system that incorporates teachings of the subject disclosure may include, for example, a method for receiving a mitigation strategy for reducing interference caused by at least one narrow band interferer detected in a wide frequency band according to an average wideband power level, an adaptive threshold, or both, creating a message according to the mitigation strategy to transmit to at least one communication device transmitting wireless signals that are associated with the at least one narrow band interferer, and transmitting the mitigation message to the at least one communication device to cause the at least one communication device to adjust operations of a wireless transmitter of the at least one communication device. Other embodiments are disclosed. | 09-11-2014 |
20140256372 | TRANSFERRING OF INFORMATION IN ELECTRONIC PRICE LABEL SYSTEMS - Electronic price label system and method for transferring information in an electronic price label system, the electronic price label system includes at least one base station and a plurality of electronic labels for transferring information between the base station and electronic labels. The base station(s) and the electronic labels includes at least communication member. The method includes sending first message from base station to electronic label using a first frequency band, after sending the first message, sending a second message from base station to electronic label using second frequency band, and sending a third message from electronic label to base station using a second frequency band. | 09-11-2014 |
20140274176 | SYSTEMS AND METHODS FOR ACTIVE FREQUENCY TABLE (AFT) GENERATION - A system and method are provided for generating and/or refining an active frequency table (AFT) for High Frequency Data Link (HFDL) communications, particularly those communications managed by a network of HFDL ground stations. Automated analysis is applied to forecast atmospheric conditions to generate an AFT for the HFDL communication network for one or more particular time windows. Historical analysis of measured atmospheric conditions is consulted to provide an approximation of an AFT. The use of the historical data includes determining, in a past time frame, when an atmospheric conditions most closely compares to the measured or forecast conditions. Reference is then be made to stored information regarding one or more AFTs that were effectively employed in the past time frame under the comparable conditions to generate an appropriate AFT according to the measured or forecast conditions. | 09-18-2014 |
20140274177 | Systems, methods, and devices for electronic spectrum management for identifying open space - Systems, methods, and apparatus are provided for automated identification of open space in a wireless communications spectrum, by identifying sources of signal emission in the spectrum by automatically detecting signals, analyzing signals, comparing signal data to historical and reference data, creating corresponding signal profiles, and determining information about the open space based upon the measured and analyzed data in near real-time. | 09-18-2014 |
20140287788 | APPARATUS AND METHOD FOR CONTROLLING INTERFERENCE IN A WIRELESS COMMUNICATION SYSTEM - Methods and apparatus are provided for controlling interference by a TP in a wireless communication system. A first message, which includes channel quality information for the TP, is received from a terminal to which the TP provides a communication service. A second message, which includes received power information for a reference signal received from the terminal, is received from at least one neighbor TP. A data transmission rate is determined for the terminal based on the channel quality information and the received power information. | 09-25-2014 |
20140308984 | Dynamically Managing and Reconfiguring Wireless Mesh Networks - A wireless network with multiple subscriber systems in a lobe pool may operate by determining a state of the wireless network, identifying a new condition, the new condition including a new demand condition or a new network health condition, determining whether the new condition has a threshold impact on operations of the wireless network or component subscriber systems of the wireless network, and if the threshold impact exists, reconfiguring the wireless network to accommodate the new condition. | 10-16-2014 |
20140315590 | INFORMATION PROCESSING APPARATUS, WIRELESS COMMUNICATION APPARATUS, AND INFORMATION PROCESSING METHOD - An information processing apparatus that manages information of a first frequency band allocated to a first communication system includes: a reception unit that receives, from a second communication system different from the first communication system, capability information indicating sensing capability of sensing a wireless signal by a communication apparatus of the second communication system; and a transmission unit that transmits, to the communication apparatus of the second communication system, information related to a sensing method for sensing a wireless signal transmitted from a communication apparatus of the first communication system in a second frequency band included in the first frequency band, based on the information of the first frequency band and the capability information of the communication apparatus of the second communication system. | 10-23-2014 |
20140323170 | METHOD FOR CONSIDERABLY ENHANCING THE AVAILABILITY OF WIRELESS CONNECTIONS - A control unit and a method for controlling a wireless data transmission between a wireless terminal and access points of a communications network in a transportation device, as well as a computer program for executing the method. The wireless terminal is assigned to two or more of the access points in such a way that one communications channel is available between the wireless terminal and the access points for wireless data transmission between the wireless terminal and the access points. A control unit is used, in the case of transmission from the access points towards the wireless terminal, to select at least one of the access points for wireless transmission to the terminal and/or in the case of transmission from the terminal towards the access points, to determine a message for further use in the communications network based on the messages received from the terminal by the access points. | 10-30-2014 |
20140378177 | RECEIVED POWER ESTIMATION DEVICE, RECEIVED POWER ESTIMATE METHOD, PROGRAM, SENSOR STATION, AND RADIO SYSTEM - The present invention is a device which, when a second wireless system shares the use of a frequency which is allocated to a first wireless system, estimates receiving power when a second wireless signal which is transmitted from a transmission station of the second wireless system is received at a receiving station of the first wireless system. The receiving power estimation device comprises a correction means for correcting a receiving power estimate value of the second wireless signal at the first wireless system receiving station which is computed using an estimate value of path loss from the second wireless system transmission station to the first wireless system receiving station, said correction using a receiving power measurement value of the second wireless signal which is measured in a transmission station periphery sensor station which is a sensor station which is located in the periphery of the second wireless system transmission station. | 12-25-2014 |
20150018026 | Systems, methods, and devices for electronic spectrum management - Systems, methods, and devices enable spectrum management by identifying, classifying, and cataloging signals of interest based on radio frequency measurements. In an embodiment, signals and the parameters of the signals may be identified and indications of available frequencies may be presented to a user. In another embodiment, the protocols of signals may also be identified. In a further embodiment, the modulation of signals, data types carried by the signals, and estimated signal origins may be identified. | 01-15-2015 |
20150038183 | Coordinated Multipoint (COMP) Techniques for Reducing Downlink Interference from Uplink Signals - Base stations (BSs) can remove inter-BS interference components from received uplink signals using downlink information communicated over a backhaul network. The downlink information is associated with downlink transmissions of neighboring base stations, and is used to remove the inter-BS interference in accordance with interference cancellation techniques, e.g., signal interference cancellation (SIC), etc. The downlink information includes information associated with downlink transmission of the interfering BSs, such as information bits (e.g., data), parity information, control information, modulation and coding scheme (MCS) parameters, forward error correction (FEC) parameters, and other information. Additionally, inter-BS interference can be suppressed using channel information of interference channels using interference suppression techniques, e.g., interference rejection combining (IRC), etc. | 02-05-2015 |
20150045076 | METHOD AND DEVICE FOR PERFORMING INTERFERENCE CONTROL - An embodiment of the invention relates to wireless communication technical field, especially relates to a method and device for performing interference control to reduce crossed time slot interference in Time Division Duplex (TDD) networking. The method of embodiment of the present invention comprises: network side device determines service load parameter value of each cell and the measurement parameter between the base stations which random two cells belongs to; For the two cells, said network side device determines an interference control threshold according to the service load parameter value of the two cells, and compares the determined said measurement parameter with said interference control threshold, and performs cluster partition according to the comparing result. Said network side device performs interference control according to the partitioned cluster. Because the factor of cell service load is considered in performing TDD crossed time slot interference control, thus the crossed time slot interference in TDD networking is reduced. | 02-12-2015 |
20150057038 | WIRELESS COMMUNICATION SYSTEM AND DATA TRANSMITTER - A wireless communication system according to an embodiment includes a first radio equipment that transmits first data using first radio waves, a data transmitter that transmits a second radio wave for causing a disturbance on the first radio wave according to second data, and a second radio equipment that modulates the first data transmitted from the first radio equipment, and modulates the second data transmitted from the data transmitter using a variation in a bit error rate of communication between the first radio equipment and the second radio equipment. The data transmitter includes an amplifier that amplifies a signal corresponding to the first radio wave received by a first antenna, and a feedback element that feedbacks a signal from an output node of the amplifier to an input node of the amplifier, and forms a feedback loop. | 02-26-2015 |
20150065185 | METHOD AND APPARATUS FOR DETECTING TRANSMITTERS FOR A WHITE SPACE DEVICE - The invention relates to a wireless home gateway apparatus and methods of wirelessly delivering audio and/or video programs between a home gateway and a client and mitigating interference thereon. Specifically, the present invention relates to transmitting an audio/video program on two white space channels and alternately stopping transmission on one of said channels to search for external transmissions on the white space channel. The present invention permits the wireless home gateway to continuously transmit an audio/video program to a client while periodically searching for transmitters on each of the white space channels. | 03-05-2015 |
20150080041 | Communication Device for Rail Vehicle, Rail Vehicle Equipped with said Device - This communication device for rail vehicle is of the type comprising a wireless communication stage to communicate with a control beacon on at least one communication spectrum band of a spectral range sub-divided into several predetermined channels. | 03-19-2015 |
20150080042 | METHOD AND DEVICE FOR MAINTAINING THE PERFORMANCE QUALITY OF A COMMUNICATION SYSTEM IN THE PRESENCE OF NARROW BAND INTERFERENCE - A system that incorporates teachings of the subject disclosure may include, for example, a method for measuring power levels of signals provided by a receiver configured to scan radio frequency signals over a wide frequency band, calculating an average power level from at least a portion of the measured power levels, determining a threshold, detecting interference in the wide frequency band based on the threshold, the average power level, or both, and causing a null that substantially suppresses the interference received by the receiver. Other embodiments are disclosed. | 03-19-2015 |
20150087346 | INTERFERENCE CONTROL BETWEEN DIFFERENT RADIO COMMUNICATION SYSTEMS INVOLVING USER EQUIPMENTS - A first User Equipment (UE), a second UE, a first Radio Network Node (RNN), and methods therein for controlling interference between transmissions in a first system and transmissions in a second system. The first system comprises the first UE and the first RNN serving the first UE. The second system comprises the second UE and a second RNN serving the second UE. The first system has a first priority in a first part of a shared spectrum and the second system has a second priority in the first part of the shared spectrum, wherein the first priority is higher than the second priority. The method in the first UE comprises transmitting a signal to a second RNN that is to perform a downlink transmission to the second UE, which signal is configured to control the transmission of the second RNN. | 03-26-2015 |
20150133177 | RADIO CHANNEL UTILIZATION - The concepts relate to radio channel utilization and more specifically to determining whether individual radio channels are available for use. One example can cause multiple sensing devices in a region to sense radio channels. The example can obtain signal information sensed by the multiple sensing devices in relation to an individual radio channel. The example can collectively analyze the signal information from the multiple sensing devices to determine whether the individual radio channel is being used for a licensed broadcast in the region. | 05-14-2015 |
20150148088 | INTERFERENCE MANAGEMENT SERVICE FOR PORTABLE COMMUNICATION DEVICES - Method for mitigating interference is established by means of a local wireless communication ( | 05-28-2015 |
20150148089 | COMMUNICATION DEVICES AND METHODS FOR OPERATING A COMMUNICATION DEVICE - A communication device is described comprising a receiver configured to receive a radio signal from another communication device via a communication channel; a detector configured to detect the presence of an impairment of the communication channel; a determiner configured to determine a type of the impairment of the communication channel; and a transmitter configured to transmit an indication of the type of the impairment of the communication channel to the other communication device. | 05-28-2015 |
20150305042 | Systems, Methods, and Devices for Electronic Spectrum Management - Systems, methods, and devices enable spectrum management by identifying, classifying, and cataloging signals of interest based on radio frequency measurements. Signal data is compared with stored data to identify the signal of interest. Signal degradation data is calculated based on noise figure parameters, hardware parameters and environment parameters. | 10-22-2015 |
20150311985 | METHOD AND APPARATUS FOR CANCELLING SELF-INTERFERENCE SIGNAL BETWEEN TRANSMISSION ANTENNA AND RECEPTION ANTENNA - An apparatus for cancelling a self-interference signal between a transmission antenna and a reception antenna is disclosed. The apparatus includes a first self-interference signal cancellation unit for cancelling a self-interference signal in consideration of a linear channel between the transmission antenna and the reception antenna, a second self-interference signal cancellation unit for cancelling a self-interference signal in consideration of nonlinear channel characteristic between the transmission antenna and the reception antenna or linear characteristic of a radio channel, and a controller for comparing a transmitted signal output from the transmission antenna and a received signal received by the reception antenna to provide a first coefficient to be applied to self-interference signal cancellation of a linear device in the first self-interference signal cancellation unit and a second coefficient to be applied to self-interference signal cancellation of a nonlinear device in the second self-interference signal cancellation unit. | 10-29-2015 |
20150311993 | PHYSICAL LAYER SIGNALING TO USER EQUIPMENT IN A WIRELESS COMMUNICATION SYSTEM - A method of wireless communication includes receiving physical layer signaling from a serving eNodeB in a wireless network. Interference estimation, interference cancellation and/or spatial equalization of user equipment is controlled in accordance with the received signaling. | 10-29-2015 |
20150326260 | METHODS AND APPARATUS FOR MITIGATING KNOWN INTERFERENCE - Systems and methods for mitigating known interference at a receiving device are provided. A signal from a transmission source is received by a receiving device that is affected by an interference source. At least one of a first pilot signal associated with the transmission source and a second pilot signal associated with the interfering source is determined. The first pilot signal includes information broadcast from the transmission source and the second pilot signal includes information broadcast from the interference source. Interference caused by the interference source is mitigated from the received signal using at least one of the first pilot signal and the second pilot signal. | 11-12-2015 |
20150327184 | SYSTEM AND METHOD FOR MAPPING POTENTIAL INTERNET PROTOCOL TELEVISION INTERFERENCE - A device is disclosed for determining a first geographical location of a customer premise, a second geographical location of a radio frequency transmitter and a third geographical location of network access equipment proximal to the customer premises, wherein the network access equipment provides access to media signals by way of a broadband communications link. The first, second and third geographical locations are mapped, and a distance between the second geographical location and one of the first geographical location or the third geographical location is determined. The distance is compared to a threshold distance based on a signal transmission power of the radio frequency transmitter, and a mitigation strategy is determined to limit interference of the radio frequency transmitter on the media signals provided to the first geographical location when the distance is less than the threshold distance. | 11-12-2015 |
20150333784 | METHOD AND APPARATUS FOR PROCESSING OF INTERMODULATION PRODUCTS - Interference to a received signal is reduced in a wireless network, the interference comprising intermodulation products of at least a first signal and a second signal. Delayed interference signals comprising simulated intermodulation products are generated on the basis of the first signal and the second signal using a range of differing delay values and each of the delayed interference signals is correlated with the received signal to produce data representing a correlation for each delayed interference signal. At least one delay value is selected in dependence on a the data representative of the correlations and an interference signal comprising simulated intermodulation products generated from the first signal and the second signal using the at least one delay value is combined with the received signal. | 11-19-2015 |
20150350930 | METHOD AND DEVICE FOR HANDLING BASE SEQUENCES IN A COMMUNICATIONS NETWORK - A method in a network node, a network node, a method in a user equipment and a user equipment handle base sequences in a communications network. The network node is configured to communicate with a user equipment. The network node, which has information about a default base sequence and an alternative base sequence, determines that the alternative base sequence should replace the default base sequence for the user equipment. The network node then sends information about the alternative base sequence to the user equipment. | 12-03-2015 |
20150351045 | TRANSMISSION POWER CONTROL METHOD, COMMUNICATION DEVICE AND PROGRAM - There is provided a method for controlling a transmission power in a second communication service making secondary usage of a spectrum assigned to a first communication service, with use of any node of one or more secondary usage node that transmits a radio signal of the second communication service, comprising the steps of: acquiring an acceptable interference power allocated to the second communication service; calculating a total sum of interference power levels on the first communication service based on transmission powers respectively required for the one or more secondary usage node; and excluding any secondary usage node of the one or more secondary usage node from allocation of the transmission power when the calculated total sum of interference power levels is larger than the acceptable interference power. | 12-03-2015 |
20150382306 | METHOD AND APPARATUS FOR PERFORMING TRANSMIT (TX) POWER CONTROL IN CONVERGENCE NETWORK OF PLURAL COMMUNICATION SYSTEMS - A method and apparatus for performing transmit (Tx) power control in a convergence network of a plurality of communication systems. A method for performing transmit power control (TPC) in a plurality of communication system convergence networks includes receiving, by a first entity of a first communication system, a TPC information request message requesting information associated with transmit power control (TPC) from a second entity of a second communication system; upon receiving a request of the TPC information request message, transmitting a first TPC information reporting message, which includes a maximum transmit (Tx) power value of the first entity and an interference signal value caused by a neighbor entity of the first entity, to the second entity; receiving a TPC command message, which includes information of the maximum Tx power value of the first entity adjusted based on the maximum Tx power value of the first entity and the interference signal value, from the second entity; and adjusting the maximum Tx power value of the first entity based on the information regarding the adjusted maximum Tx power of the first entity. | 12-31-2015 |
20160056878 | USER APPARATUS AND USER ASSIGNMENT INFORMATION ESTIMATION METHOD - A user apparatus that is used in a radio communication system including a plurality of base stations, and that includes a function for performing interference reduction based on user assignment in an interference cell, including: interference pattern generation means that generates a plurality of interference patterns each of which is a combination of presence or absence of an interference signal in a given number of interference cells for the user apparatus; reception quality calculation means that calculates a reception quality after interference reduction for each of the plurality of interference patterns generated by the interference pattern generation means; and user assignment information estimation means that determines presence or absence of an interference signal in each interference cell corresponding to an interference pattern based on which the best reception quality is obtained in reception qualities calculated by the reception quality calculation means to be presence or absence of user assignment. | 02-25-2016 |
20160080964 | APPARATUS AND METHOD FOR PERFORMING MEASUREMENT REPORT CONSIDERING IN-DEVICE COEXISTENCE INTERFERENCE - The present invention relates to an apparatus and a method for performing measurement reporting considering in-device coexistence interference. The present invention provide a user equipment transmitting a measurement report in a wireless communication system, comprising an interference detection unit, an assistant information generation unit, a measurement controller and a transmitter According to the present invention, a measurement procedure can be clearly defined in an interference delicate band where in-device coexistence interference occurs and scheduling restrictions on an eNodeB due to measurement reporting about an interference delicate band can be reduced. | 03-17-2016 |
20160134314 | Oportunistic Interference Cancellation Of Radar Signals - In accordance with the exemplary embodiments there is at least a method and apparatus to operations including determining, by a communication device, parameters for each of at least one interfering radio signal of a communication signal received by one or more antenna of the communication device; and based on the determined parameters, at least one of suppressing and cancelling the at least one interfering radio signal from the communication signal by the communication device. | 05-12-2016 |
20160134350 | WIRELESS COMMUNICATION SYSTEM AND DATA TRANSMITTER - A wireless communication system includes a first radio equipment that transmits first data using a first radio wave; a data transmitter that transmits a second radio wave, the second radio wave causing a disturbance on the first radio wave according to second data to be transmitted; and a second radio equipment that demodulates the first data transmitted from the first radio equipment, and demodulates the second data transmitted from the data transmitter using a variation in a bit error rate of communication between the first radio equipment and the second radio equipment, wherein the data transmitter includes a first antenna that receives the first radio wave; an input amplifier that amplifies a signal corresponding to the first radio wave received by the first antenna; and an oscillator that is supplied with an output from the input amplifier, and oscillates at the same frequency as that of the first radio wave. | 05-12-2016 |
20160173218 | Coordinated Multipoint (COMP) Techniques for Reducing Downlink Interference from Uplink Signals | 06-16-2016 |
20160192341 | BASE STATION AND SIGNAL TRANSMITTING CONTROL METHOD OF THE SAME, AND WIRELESS COMMUNICATION SYSTEM - Disclosed is a base station transmitting multiple beams to multiple beam areas, including: a determination unit determining at least any one of whether a downlink control signal is transmitted through the multiple beams transmitted to the multiple beam areas and a transmission section; a generation unit generating signal transmitting control information including at least any one of whether the downlink control signal is transmitted, the transmission section of the downlink control signal, and derivation information to derive a change of an access beam for a terminal that accesses the multiple beams; a communication unit downlink-transmitting the signal transmitting control information to the multiple beam areas or the multiple beams; and a control unit controlling transmission of the downlink control signal based on the signal transmitting control information. | 06-30-2016 |
20170238219 | RADIOGRAPHIC IMAGE CAPTURING SYSTEM | 08-17-2017 |
20180027425 | METHODS AND SYSTEMS FOR IMPROVING WIRELESS SIGNAL | 01-25-2018 |