Patent application number | Description | Published |
20100184435 | METHODS AND APPARATUS FOR PROVIDING A WIRELESS EXPANSION NETWORK - Methods and apparatus for providing a wireless expansion network. In an aspect, an apparatus includes an expansion circuit configured to identify at least one of a selected uplink (UL) channel and a selected downlink (DL) channel that are provided by one of a primary network and an expansion network, and a processing circuit configured to switch to the at least one of the selected UL and DL channels. An apparatus includes means for obtaining link parameters associated with a primary network and an expansion network, means for identifying clients that are assigned transmission channels on both the primary network and the expansion network based on the link parameters, and means for transmitting messages to the clients to indicate the assigned transmission channels. | 07-22-2010 |
20100195572 | DISTRIBUTED PRIORITIZED CONTENTION FOR SPECTRUM SHARING - Techniques for use in contending for a portion of a television channel spectrum are disclosed. In some instances, a back-off value is used to decide whether a contender's contention number will be transmitted when the contention channel is free, and the back-off value is determined based on the contention number. In some instances, a contender monitors the contention channel and withdraws from contention if it detects from the contention channel that a higher priority contender is in contention. | 08-05-2010 |
20100197317 | MULTICHANNEL DYNAMIC FREQUENCY SELECTION - Multichannel dynamic frequency selection in wireless networks begins with an access point for a wireless network broadcasting a list of unused channels that are available for communication within the area served by the access point. The various access terminals within this service area receive the broadcast and measure various interference characteristics of each of the channels in the list. The access terminals then send this interference information to the access point, which compiles a matrix of interference information that is associated with the quality of each signal as related to each access terminal. Using this information, the access point selects the appropriate channels to serve the most number of access terminals at the highest possible channel qualities. | 08-05-2010 |
20110009049 | Adjustable Transmitter For Privacy Protection Of Content Broadcast From A Transmitting Device To A Receiving Device - Transmitting devices facilitate privacy protection of content broadcasted from the transmitting device to a receiving device without the need to modify the receiving device. A transmitting device may be adapted to acquire content, such as audio and/or video data, to be broadcasted by the transmitter for reception and use by a receiving device. A transmission range is selected to define a distance for broadcasting the content from the transmission device for reception and use by a receiving device. A frequency is also selected to be used for broadcasting the content. With the transmission range and frequency selected, the transmitting device may broadcast the content according to the selected transmission range and frequency. | 01-13-2011 |
20110045781 | SENSING WIRELESS COMMUNICATIONS IN TELEVISION FREQUENCY BANDS - In general, techniques are described for sensing wireless communications in television frequency bands, which may be implemented by a sensing device comprising a sensing unit, a power spectral density (PSD) estimation unit, a filter unit, a candidate selection unit, an analysis unit and a decision unit. The sensing unit senses a signal in the television frequencies bands. The PSD estimation unit calculates an estimate of a PSD for the sensed signal. The filter unit filters the estimated PSD. The candidate selection unit analyzes the filtered PSD to identify a candidate frequency representative of a potentially in use frequency. The analysis unit computes a test statistic for the candidate frequency. The decision unit compares the test statistic to a threshold to identify whether the candidate frequencies is actively in use by wireless communication devices. | 02-24-2011 |
20110128895 | APPARATUS AND METHOD FOR SPECTRUM SHARING USING LISTEN-BEFORE-TALK WITH QUIET PERIODS - Apparatus and method for spectrum sharing using listen before talk (LBT) and quiet periods are disclosed. This includes assessing using LBT to determine if a shared spectrum channel is being used by at least one other network, and transmitting transmission frames over the shared spectrum channel in at least one of an uplink or a downlink when the channel is determined as not being used. The accumulated time of transmission use of the spectrum channel is counted based on predetermined conditions, and a determination made when the accumulated time exceeds a maximum allotted time. Transmission of frames by a network is allowed to continue if the maximum time has not been exceeded and the spectrum remains available. A quiet period is then executed once the maximum time period is exceeded. | 06-02-2011 |
20110164186 | DISTINGUISHING AND COMMUNICATING BETWEEN WHITE SPACE DEVICES TRANSMITTING ATSC-COMPATIBLE SIGNALS - White space signals are differentiated from licensed ATSC signals through modification of a waveform of the white space signal. White space signals may be modified by shifting the ATSC-compatible waveform so that the pilot frequency of the white space signal is at a location outside of the frequency range associated with the pilot frequency in a licensed ATSC signal or embedding a watermark signal into said ATSC-like white space signals. White space device transmitters generate the signals with these modifications and white space receivers are equipped to detect whether a pilot exists in the standard licensed pilot frequencies. Based on these differences, white space devices can better operate without interfering with licensed ATSC transmission. Additionally, the modification techniques may be used to embed data in the white space signal that may be used to communicate connection data or networking data to other white space devices. | 07-07-2011 |
20110176644 | AUTOMATIC GAIN CONTROL IN RADIO FREQUENCY RECEIVERS - An automatic gain controller (AGC) in white space devices is configured with two operational modes. When entering a quiet time of the white space device, the AGC selects the first operational mode. The first operational mode is associated with detecting licensed signals on one or more white space channels by testing a measured received signal strength indicator (RSSI) value to determine which one of a number of the AGC's gain states should be used corresponding to a gain for application to input white space signals on the whitespace channels. When not in the quiet time, the AGC enters a second operational mode. The second operational mode sets a fixed gain state of the AGC's multiple gain states to apply in selecting one of the white space channels on which no licensed signals were detected. | 07-21-2011 |
20110182257 | WHITE SPACE SPECTRUM COMMMUNCIATION DEVICE WITH MULTIPLEXING CAPABILTIES - In one example, a method includes receiving a plurality of input signals at a multiplexer of a white space device, and generating, via the multiplexer, a multiplexed output signal that includes at least two of the plurality of input signals. The method also includes sensing whether a white space frequency is available for unlicensed use, and communicating the multiplexed output signal over the white space frequency via a transmitter of the white space device when the white space frequency is available for unlicensed use. | 07-28-2011 |
20110250858 | FREQUENCY SELECTION AND TRANSITION OVER WHITE SPACE - A method of wireless communication includes determining at least one neighboring apparatus from which to obtain information, obtaining information related to a plurality of channels from the at least one neighboring apparatus, selecting a channel from the plurality of channels based on the obtained information, and transmitting on the selected channel. | 10-13-2011 |
20110312330 | DEVICE DISCOVERY ON WHITE SPACE FREQUENCIES - A method of wireless communication includes receiving a first signal on a first channel, determining a second channel based on the first signal, receiving a second signal on the second channel, and communicating with a wireless device on the second channel based on a quality of the second signal. | 12-22-2011 |
20120099449 | SPATIAL RESUSE IN A WIRELESS NETWORK - In a first method, a first apparatus determines a channel gain to a second apparatus with which the first apparatus is communicating. The first apparatus determines interferer backoff information that ensures an interference level at the first apparatus such that a signal received from the second apparatus can be decoded reliably. The interferer backoff information is determined based on the channel gain. The first apparatus transmits information based on the interferer backoff information in a message to the second apparatus. In a second method, a first apparatus in communication with a second apparatus determines a channel gain to a third apparatus with which the first apparatus can potentially interfere. The first apparatus receives a message from the third apparatus. The message includes interferer backoff information. The first apparatus determines a power for transmitting a signal to the second apparatus based on the interferer backoff information and the channel gain. | 04-26-2012 |
20120099450 | SPATIAL REUSE IN A WIRELESS NETWORK - A method, an apparatus, and a computer program product are provided. The apparatus determines a channel gain to a second wireless device with which the first wireless device is communicating. In addition, the apparatus determines interferer backoff information that ensures an interference level at the first wireless device such that a signal received from the second wireless device can be decoded reliably. The interferer backoff information is determined based on the channel gain. Furthermore, the apparatus transmits information based on the interferer backoff information in one of an RTS message or a CTS message to the second wireless device. | 04-26-2012 |
20120113906 | METHOD AND APPARATUS TO FACILITATE SUPPORT FOR MULTI-RADIO COEXISTENCE - A connection engine and coexistence manager are employed to manage radio resources in a user equipment. The connection engine defines desired performance metrics for sets of radio resources. The coexistence manager allocates potentially interfering radio resources to achieve desired performance metrics while accounting for resource capacity, potential collision rates, and other metrics. | 05-10-2012 |
20120122477 | GEO-LOCATION AIDED SENSING - There lies a challenge to develop a technique of accurately and efficiently determining an available communication channel. In accordance with some embodiments disclosed herein, techniques for sensing a primary user of a particular communication channel are performed more efficiently. In some implementations, a geo-location of a communication device is combined with a sensing algorithm in order to more efficiently perform spectrum sensing. In some implementations, a geo-location and an accuracy determination may be used to determine all required sample regions in order to ensure that a primary user is not present in a particular location. | 05-17-2012 |
20120188907 | METHOD AND APPARATUS TO FACILITATE SUPPORT FOR MULTI-RADIO COEXISTENCE - To improve performance in devices capable of communication using multiple radio access technologies (RATs), a gap pattern may be constructed in which a first RAT is quieted during certain times to allow for a second RAT to operate without interference. Gap patterns may be constructed based on timeline constraints, such as grant scheduling and HARQ performance, or based on desired performance levels of one or more of the RATs. Gap patterns may be selected by a user equipment or base station. Gap patterns may be selected to protect information in certain subframes. Potential gap patterns may be assigned weights indicating their desirability. | 07-26-2012 |
20120307749 | CONFIGURABLE FILTER FOR MULTI-RADIO INTERFERENCE MITIGATION - In a multi-radio device, a configurable filter may be placed on the transmit side of an aggressor radio to reduce interference to receive side performance of a victim radio. The filter may be adaptively configured based on performance of the victim radio. The configurable filter may be in the form of a notch filter. The depth and width of the notch filter may be configured. The filter may be used to create a virtual guard band between an Industrial Scientific and Medical (ISM) band and a cellular band by puncturing a physical uplink control channel (PUCCH) transmission nearest to the ISM band or reducing power on the nearest PUCCH transmission. | 12-06-2012 |
20120314598 | MULTI-RADIO COEXISTENCE - Prior to implementing a coexistence solution for a multi-radio device, a measurement determines whether interference experienced by one radio is caused by another radio on the device. This determination includes comparing measurements of the first radio during times when the other radio is operational and when the other radio is inactive. If the compared performance measurements are within a certain range, a coexistence/interference management solution may be implemented. | 12-13-2012 |
20130010766 | SUPPORT FOR MULTI-RADIO COEXISTENCE DURING CONNECTION SETUP - In a user equipment (UE) with multiple radio access technologies (RATs), communications of one RAT engaged in connection setup may be protected from communications of other RATs. Techniques for protecting such connection setups include performing power backoff on a potentially interfering RAT or implementing a time division multiplexing (TDM) solution alternating when certain RATs are active. | 01-10-2013 |
20130012138 | METHOD FOR IMPROVING ROBUSTNESS OF SPECTRUM SENSING IN PRESENCE OF BURSTY INTERFERENCE - A method of wireless communication in white space includes spectrum sensing in the white space during each of multiple sensing intervals. The method also includes determining whether each of the sensing intervals is subject to interference. The determining process may be based on a time domain analysis or a frequency domain analysis of signal power during each sensing interval. | 01-10-2013 |
20130021983 | FACILITATING USER EQUIPMENT FEEDBACK TO MANAGE RATE LOOP AT A BASE STATION - A method of wireless communication includes denying time or frequency resources of a first radio access technology (RAT) to allow communications of a second RAT. Information is reported about the denied resources of the first RAT to facilitate a connection setup on one of the first RAT and the second RAT. | 01-24-2013 |
20130059614 | METHODS AND APPARATUS FOR IDENTIFYING AND/OR SELECTING CHANNELS - A decentralized approach to peer discovery channel selection is used in some embodiments. In some such embodiments, a mobile wireless terminal supporting a peer to peer signaling protocol, independently determines what channels to use for peer discovery without a central controller indicating the channel or channels to be used. Assuming channels are of a suitable quality, the channels having the best quality need not be identified, with channel selection being made on a predetermined channel ordering basis from those with suitable quality. Different wireless communications devices in the system use the same peer discovery channel selection process making it likely that the same channel or channels will tend to be picked to be used for peer discovery. Other embodiments are directed to implementing a centralized approach to peer discovery channel selection in which a central controller or base station selects channels to be used for peer discovery signaling. | 03-07-2013 |
20130083712 | DISCONTINUOUS RECEPTION (DRX) BASED MECHANISMS FOR CONNECTION SETUP - A user equipment (UE) may detect a potential collision between a discontinuous reception (DRX) pattern of a first radio access technology (RAT) and a reception time of a message from a second RAT of a remote device. The reception time may be unknown. The UE may dynamically reconfigure the DRX pattern to reduce a likelihood of the potential collision. The UE may also configure transmission of a different message by the second RAT during a DRX off-period to reduce a likelihood of the potential collision. | 04-04-2013 |
20130107868 | MITIGATING IMPACT OF POWER IMBALANCE ON REMOTE DATA RATE IN WIRELESS LOCAL AREA NETWORK | 05-02-2013 |
20130176877 | DETECTING BURSTY INTERFERENCE TO TRIGGER A COEXISTENCE INDICATION - A user equipment (UE) may reduce coexistence issues with one or more radio access technologies (RATs) caused by a bursty interference. The bursty interference may be detected by detecting a number of modes in a measured signal sample and determining when a signal contains a multi-modal distribution based at least in part on the detecting. A coexistence indication is created based at least in part on the determining. | 07-11-2013 |
20130225149 | MITIGATING CROSS-DEVICE INTERFERENCE - A device in a wireless system may determine when communications of a first radio access technology (RAT) experience interference from communications of a second RAT and may alter the communications of at least the first RAT or the second RAT to reduce the interference. In some instances, altering the communications include controlling a transmission rate to the second RAT based at least on a determined channel capacity. | 08-29-2013 |
20140071941 | METHODS AND APPARATUS FOR PCI SELECTION TO REDUCE INTERFERENCE FROM UNLOADED CELLS - A method, an apparatus, and a computer program product for wireless communication are provided in connection with improving PCI selection and/or allocation so as to reduce interference from unloaded cells. In one example, a network entity is equipped to determine whether a cell is loaded or unloaded, and allocate a PCI from a common pool of PCIs to the cell when the cell is unloaded. In another example, a network entity is equipped to determine that a cell is to transition between an unloaded state and a loaded state, and use a first PCI from a common PCI pool associated with the cell in the unloaded state and a second PCI associated with the cell in the loaded state. In another example, a communications device is equipped to attempt to access a first cell associated with a first PCI which indicated that the first cell is unloaded. | 03-13-2014 |
Patent application number | Description | Published |
20130279355 | MULTI-RADIO COEXISTENCE - A method for wireless communications includes determining a time division duplex (TDD) configuration of a non-serving network. The method also includes detecting interference from the non-serving network based at least in part on the TDD configuration of the non-serving network. The method further includes signaling an eNodeB of the interference based at least in part on the detecting. | 10-24-2013 |
20140036805 | MANAGEMENT OF UNCOORDINATED INTERFERENCE - An interference management scheme may detect a level of uncoordinated interference and compare a detected uncoordinated interference level against an intra-RAT (radio access technology) interference. Intra-RAT interference management algorithms or intra-RAT interference solutions are not triggered/applied if the uncoordinated interference is dominant. Alternatively, intra-RAT interference management algorithms may be triggered if co-channel intra-RAT interference is dominant. | 02-06-2014 |
20140071894 | VARIABLE BLOCK LENGTH AND SUPERPOSITION CODING FOR HYBRID AUTOMATIC REPEAT REQUEST - An eNB may retransmit packets according to a hybrid automatic repeat request using superposition coding. In one instance, the eNB receives a negative-acknowledgement of an initially transmitted packet and retransmits at least one packet according to hybrid automatic repeat request using superposition coding in response to the negative-acknowledgement. The eNB also retransmits packets according to variable block length retransmission. In this instance, the eNB receives a negative-acknowledgement of an initially transmitted fixed block length packet and retransmits a variable block length packet in response to the negative-acknowledgement | 03-13-2014 |
20140219117 | APPARATUS AND METHOD FOR INTER CELL INTERFERENCE COORDINATION - The present disclosure presents a method and an apparatus of triggering an inter cell interference coordination (ICIC) mechanism in a wireless network. For example, the disclosure presents a method for identifying a pilot pollution metric and determining when a pilot pollution condition based at least on the pilot pollution metric is satisfied. In addition, such as an example method may include triggering an ICIC mechanism when the pilot pollution condition is satisfied. As such, triggering an ICIC mechanism in a wireless network may be achieved. | 08-07-2014 |
20140269367 | METHOD AND APPARATUS FOR MITIGATING THE IMPACT OF SHORT INTERFERENCE BURSTS - Techniques are provided for utilizing selected inter-frame spacing, such as reduced inter-frame spacing (RIFS) or short inter-frame spacing (SIFS) to avoid failed data transmissions in a Wi-Fi network or the like. For example, there is provided a method, operable by a transmitter node or entity, such as, for example, an access point (AP), that may involve sending a data transmission in a data aggregation mode, the data transmission comprising aggregated MAC protocol data units (A-MPDUs). The method may involve monitoring for and detecting potential short interference bursts in the network. The method may involve re-sending the data transmission in a data bursting mode, the data transmission comprising back-to-back data packet bursts separated by a selected inter-frame spacing. | 09-18-2014 |
20140269623 | METHOD AND APPARATUS FOR PDCCH POWER AND RATE CONTROL FOR DENSE SMALL CELLS - System, apparatus, and methods are provided for improving channel quality and handover performance in a wireless communication network. A network entity may determine a resource element quantity for use by a control channel and may determine a power level for a resource element for use by the control channel. The network entity may assign the determined resource element quantity to the control channel and may implement the determined power level for the resource element. The network entity may determine a channel quality of the control channel and may determine a presence of an access terminal in a handover region. The determined resource element quantity may be based on the channel quality. The determined power level may be based on the channel quality. | 09-18-2014 |
20150063098 | REDUCING INTERFERENCE FROM LTE IN UNLICENSED BANDS - The disclosure relates to reducing Wi-Fi interference from small cells that provide cellular coverage in unlicensed bands. In particular, in response to determining that a small cell is substantially unloaded (e.g., has traffic below a threshold), the small cell may be switched to a reduced interference configuration. For example, the small cell may be switched to a low downlink configuration to reduce interference in a time domain and/or a low bandwidth configuration to reduce interference in a frequency domain. Alternatively (or additionally), the small cell and/or any other small cells that have traffic below the threshold may switch to the same frequency and/or channel number to concentrate all possible interference on the same frequency and/or channel number. Further still, the configuration may be switched in a power domain, where a transmit power associated with the small cell may be adapted based on cellular measurements in combination with Wi-Fi measurements. | 03-05-2015 |
20150063099 | ROBUST INTER-RADIO ACCESS TECHNOLOGY OPERATIONS IN UNLICENSED SPECTRUM - Systems and methods are disclosed for mitigating interference between Radio Access Technologies (RATs) sharing operating spectrum in an unlicensed band of radio frequencies. The mitigation may comprise, for example, identifying an upcoming signal transmission associated with a first RAT, with the signal transmission being scheduled for transmission on the shared operating spectrum during a transmission period. The signal transmission may be classified with respect to a protection status. Based on the protection status, a channel reservation message may be transmitted that is associated with a second RAT to reserve at least a portion of the shared operating spectrum for at least a portion of the transmission period. | 03-05-2015 |
20150063146 | RADAR DETECTION IN WIRELESS NETWORK THAT USES FREQUENCY-DIVISION DUPLEXING - An apparatus, configured to communicate with an access terminal in a wireless network and operating in a frequency-division duplexing mode, can be caused to refrain from transmitting during at least one subframe of a frame of a downlink frequency band, and can be caused to monitor for the radar transmission during the at least one subframe of the frame of the downlink frequency band. Optionally, a placement of the at least one subframe within the frame of the downlink frequency band can correspond to a placement of at least one subframe that is designated for an uplink communication within a frame of a wireless network that is operating in accordance with the Long-Term Evolution Time-Division Duplex standard, or can correspond to a placement of at least one subframe that is designated for a transmission in accordance with the Multimedia Broadcast Multicast Service specification. | 03-05-2015 |
20150063147 | MANAGING RADAR DETECTION IN WIRELESS NETWORK THAT USES FREQUENCY-DIVISION DUPLEXING - An apparatus, configured to communicate with other apparatuses in a wireless network and operating in a frequency-division duplexing mode, can be caused to refrain from transmitting during a number of subframes of a frame of a downlink frequency band prior to a detection of a radar transmission, can be caused to send a first signal, related to monitoring for the radar transmission, to a second apparatus, and can be caused to change the number of the subframes of the frame of the downlink frequency band in response to an event that can be an increase or a decrease in a load of the apparatus or the detection of the radar transmission. Optionally, placement of the subframes within the frame of the downlink frequency band can correspond to placement of subframes that are designated for an uplink communication within a frame configured in accordance with the Long-Term Evolution Time-Division Duplex standard. | 03-05-2015 |
20150063148 | ROBUST INTER-RADIO ACCESS TECHNOLOGY OPERATIONS IN UNLICENSED SPECTRUM - Systems and methods for co-existence in unlicensed spectrum are disclosed. In one aspect, mitigating interference between Radio Access Technologies (RATs) sharing operating spectrum in an unlicensed band of radio frequencies may comprise, for example, determining an inter-RAT interference metric associated with base station narrowband signaling on the unlicensed band and modifying a transmission parameter relating to a transmission power or signaling scheme for narrowband signaling based on the determined inter-RAT interference metric. In accordance with the modified transmission parameter, a narrowband signal may be transmitted on the unlicensed band. | 03-05-2015 |
20150063150 | MEASUREMENT REPORTING IN UNLICENSED SPECTRUM - Systems and methods for measurement reporting in unlicensed spectrum are disclosed. A user device may perform one or more signaling measurements in an unlicensed frequency band in accordance with a first Radio Access Technology (RAT) and send feedback information relating to the signaling measurements to a small cell base station, with the feedback information being sent in accordance with a second RAT. A message may be sent to the user device in accordance with the second RAT that configures the user device to perform the one or more signaling measurements in the unlicensed frequency band. | 03-05-2015 |
20150063151 | OPPORTUNISTIC SUPPLEMENTAL DOWNLINK IN UNLICENSED SPECTRUM - Systems and methods for managing communication in an unlicensed band of frequencies to supplement communication in a licensed band of frequencies in unlicensed spectrum are disclosed. The management may comprise, for example, monitoring utilization of resources currently available to a first Radio Access Technology (RAT) via at least one of a Primary Cell (PCell) operating in the licensed band, a set of one or more Secondary Cells (SCells) operating in the unlicensed band, or a combination thereof. Based on the utilization, a first SCell among the set of SCells may be configured or de-configured with respect to operation in the unlicensed band. | 03-05-2015 |
20150063321 | RADAR DETECTION - Systems and methods for radar detection in a communication environment are disclosed. The radar detection may comprise, for example: receiving a first signal; identifying the first signal as a potential radar signal; limiting transmission by an apparatus as a result of the identification; receiving a second signal while the transmission by the apparatus is limited; and determining whether at least one of the first signal, the second signal, or a combination thereof is a radar signal. | 03-05-2015 |
20150063323 | CHANNEL SELECTION TO REDUCE INTERFERENCE TO A WIRELESS LOCAL AREA NETWORK FROM A CELLULAR NETWORK - The disclosure is related to selecting an operating channel for a cellular network to reduce interference to a wireless local area network (WLAN) operated by a small cell comprising a WLAN access point and a cellular network modem. The small cell performs a channel scan of available channels, determines whether or not there is a clean channel to be the operating channel for the cellular network based on the channel scan, wherein a clean channel comprises a channel that interferes with the WLAN less than a WLAN interference threshold, and selects the clean channel as the operating channel for the cellular network based on the clean channel being available or turns off the cellular network based on no clean channel being available. | 03-05-2015 |
20150065144 | METHODS AND APPARATUS FOR PARAMETER SELECTION AND CONFLICT RESOLUTION FOR MULTIPLE RADIO ACCESS TECHNOLOGIES - Methods and apparatus for communication comprise selecting a first parameter value for a first RAT transmission-related parameter from a first set of selectable first parameter values and a second parameter value for a second RAT transmission-related parameter from a second set of selectable second parameter values based at least in part on a mapping function that maps between ones of the first set of selectable first parameter values for the first RAT transmission-related parameter and the second set of selectable second parameter values for the second RAT transmission-related parameter. Moreover, the methods and apparatus comprise communicating using at least one of the first parameter value of the first RAT transmission-related parameter for the first RAT and the second parameter value of the second RAT transmission-related parameter for the second RAT. | 03-05-2015 |
20150065152 | OPPORTUNISTIC CARRIER AGGREGATION FRAMEWORK FOR EFFICIENT LTE OPERATION IN UNLICENSED SPECTRUM - Described herein are techniques for reducing efficient LTE operation in the unlicensed band. For example, the technique may involve establishing a connection with a primary component carrier on the licensed communication band or the unlicensed communication band. The technique may also involve determining at least one metric associated with a constraint on a transmissions channel of the unlicensed communication band. The technique may also involve sending the at least one metric to the primary component carrier. The technique may also involve receiving a message for one of switching on or switching off a secondary component carrier (SCC) for transmissions on the unlicensed communication band in response to sending the at least one metric. | 03-05-2015 |
20150080003 | MOBILITY-BASED FRACTIONAL FREQUENCY REUSE - Fractional frequency reuse (FFR) is defined based on a mobility condition of an access terminal. For example, upon determining that an access terminal is moving (or at a cell edge, or experiencing poor link conditions, etc., due to mobility), FFR may be defined for the serving access point of the access terminal and/or for neighbor access points to maintain acceptable link quality for the access terminal. In particular, FFR may be defined in a manner that frees-up or otherwise reserves resources for the access terminal. For example, the serving access point may allocate additional sub-bands for the access terminal and/or increase the power levels used on the sub-bands allocated for the access terminal. In addition, neighbor access points may back-off these sub-bands. | 03-19-2015 |
20150085683 | TECHNIQUES FOR PERFORMING CARRIER SENSE ADAPTIVE TRANSMISSION IN UNLICENSED SPECTRUM - Aspects for reducing interference between networks are provided. A signal transmitted by a first network over a communications medium using an unlicensed frequency spectrum is decoded to determine one or more parameters of a packet in the signal. A level of utilization of the communications medium by the first network can be estimated based at least in part on a signal strength of the signal and the one or more parameters. A time for communicating in a second network over the communications medium using the unlicensed frequency spectrum can be adjusted based at least in part on the level of utilization of the communications medium by the first network. | 03-26-2015 |
20150085684 | CARRIER SENSE ADAPTIVE TRANSMISSION (CSAT) IN UNLICENSED SPECTRUM - Systems and methods for Carrier Sense Adaptive Transmission (CSAT) and related operations in unlicensed spectrum are disclosed to reduce interference between co-existing Radio Access Technologies (RATs). The parameters for a given CSAT communication scheme may be adapted dynamically based on received signals from a transceiver for a native RAT to be protected and an identification of how that RAT is utilizing a shared resource such as an unlicensed band. Other operations such as Discontinuous Reception (DRX) may be aligned with a CSAT Time Division Multiplexed (TDM) communication pattern by way of a DRX broadcast/multicast message. Different TDM communication patterns may be staggered in time across different frequencies. Channel selection for a co-existing RAT may also be configured to afford further protection to native RATs by preferring operation on secondary channels as opposed to primary channels. | 03-26-2015 |
20150085792 | PERFORMANCE OF A USER EQUIPMENT (UE) IN UNLICENSED SPECTRUM - The present disclosure presents a method and an apparatus for improving performance of a user equipment (UE) operating in unlicensed spectrum. For example, the disclosure presents a method for receiving, at the UE, a secondary component carrier (SCC) update from a small cell. The example method further includes tuning the UE to a second SCC in response to receiving the update. The update is received at the UE when the small cell operating on a first radio access technology (RAT) determines that a channel associated with a first SCC of the small cell is also in use by another entity operating on a second RAT. As such, improved performance of a user equipment (UE) operating in an unlicensed spectrum may be achieved. | 03-26-2015 |
20150085841 | CARRIER SENSE ADAPTIVE TRANSMISSION (CSAT) IN UNLICENSED SPECTRUM - Systems and methods for Carrier Sense Adaptive Transmission (CSAT) and related operations in unlicensed spectrum are disclosed to reduce interference between co-existing Radio Access Technologies (RATs). The parameters for a given CSAT communication scheme may be adapted dynamically based on received signals from a transceiver for a native RAT to be protected and an identification of how that RAT is utilizing a shared resource such as an unlicensed band. Other operations such as Discontinuous Reception (DRX) may be aligned with a CSAT Time Division Multiplexed (TDM) communication pattern by way of a DRX broadcast/multicast message. Different TDM communication patterns may be staggered in time across different frequencies. Channel selection for a co-existing RAT may also be configured to afford further protection to native RATs by preferring operation on secondary channels as opposed to primary channels. | 03-26-2015 |
20150105067 | LONG TERM EVOLUTION INTERFERENCE MANAGEMENT IN UNLICENSED BANDS FOR WI-FI OPERATION - Systems and methods for improved interference management by Wi-Fi devices are disclosed. The interference management may be achieved by monitoring, by the Wi-Fi device, signaling energy on a communication channel in a frequency band associated with the Wi-Fi device, comparing the monitored signal energy with a known waveform signature corresponding to Long Term Evolution (LTE) operation, and identifying a presence of an LTE interferer on the communication channel in the frequency band associated with the Wi-Fi device based on the comparison. | 04-16-2015 |
20150117366 | SYSTEMS AND METHODS FOR IMPROVED COMMUNICATION EFFICIENCY IN HIGH EFFICIENCY WIRELESS NETWORKS - Methods and apparatus for adjusting transmission power in wireless networks are provided. One aspect of the disclosure provides a method of wireless communication over a wireless communication medium. The method includes determining a level of interference for a data transmission from a transmitting device to an intended receiving device. The method further includes setting a transmission power level for transmitting a message based on the interference level, the message comprising one of a request-to-send (RTS) packet and a clear-to-send (CTS) packet. The method further includes transmitting the message at the set transmission power level. | 04-30-2015 |
20150133057 | SYSTEM AND METHOD FOR CHANNEL SELECTION TO REDUCE IMPACT TO AN EXISTING NETWORK - Described herein are techniques for reducing interference to non-cellular communications on an unlicensed band by a network entity sending/receiving cellular communications on the unlicensed band. For example, the technique may involve accessing a list of channels for cellular communication on the unlicensed band, the list having the channels in an order of priority for reducing interference to non-cellular communication on the unlicensed band. The technique may involve determining an interference criteria for a received signal, the interference criteria being based at in part on at least one of a received signal strength indicator (RSSI) or a duty cycle of the received signal. The technique may involve going through, in the order of priority, each channel in the list to identify a first channel that satisfies the interference criteria. | 05-14-2015 |
20150133184 | METHODS FOR LTE CHANNEL SELECTION IN UNLICENSED BANDS - Described herein are techniques for reducing interference to non-cellular communications on an unlicensed band by a network entity sending/receiving cellular communications on the unlicensed band. For example, the technique may involve operating in a first mode using a first radio access technology (RAT1), and collecting interference measurements for interference to or from at least one mobile device while in the first mode. The technique may also involve switching to a second mode and using a second radio access technology (RAT2), and using the interference measurements from the first mode to minimize interference caused or experienced by the network entity in the second mode. | 05-14-2015 |
20150163680 | APPARATUS AND METHODS FOR CELLULAR COMMUNICATIONS OVER UNUSED UNLICENCED SPECTRUM - Apparatus and methods of wireless communications are described for determining one or more bands (e.g., guard bands in wireless local area networks (WLANs)) in unused portions of an unlicensed spectrum, positioning one or more carriers for cellular communication (e.g., long term evolution (LTE) or LTE advanced communication) in the one or more bands, and performing the cellular communication over the unlicensed spectrum using the one or more carriers. In some non-limiting example aspects, the cellular communication may be in a standalone mode and the one or more carriers may include a primary component carrier (PCC) that is positioned in a Wi-Fi guard band. In these non-limiting example aspects, the apparatus and methods may further include allocating one or more secondary component carriers (SCCs) in Wi-Fi guard bands or in Wi-Fi channels, where the one or more SCCs are opportunistically tuned or turned ON/OFF based on cell loading or backhaul constraints. | 06-11-2015 |
20150163681 | LOAD BALANCING IN NETWORK DEPLOYMENTS USING UNLICENSED SPECTRUM - Systems and methods for interference mitigation in unlicensed spectrum are disclosed. In an aspect, the methods and apparatus may include requesting, by a first network entity, one or more user equipments (UEs) to perform a plurality of frequency measurements, wherein the plurality of frequency measurements comprises measurements in a licensed spectrum and measurements in an unlicensed spectrum. Further, the methods and apparatus may include calculating a power back-off value based on the plurality of frequency measurements. Moreover, the methods and apparatus may include adjusting a cell coverage based on the power back-off value such that the one or more UEs are outside the cell coverage. | 06-11-2015 |
20150163753 | ADAPTING BASIC SERVICE SET BASIC RATE SET FOR 802.11 WIRELESS LOCAL AREA NETWORKS - Adaption of a Basic Service Set (BSS) Basic Rate Set for a Wireless Local Area Network (WLAN) Access Point (AP) may be achieved by, for example, determining a transmission power metric for one or more Subscriber Stations (STAs) associated with the AP, modifying one or more data rates in the BSS Basic Rate Set for the AP based on the transmission power metric, and transmitting the modified BSS Basic Rate Set to the one or more STAs. | 06-11-2015 |
20150163801 | CARRIER SENSE ADAPTIVE TRANSMISSION (CSAT) COORDINATION IN UNLICENSED SPECTRUM - Systems and methods for Carrier Sense Adaptive Transmission (CSAT) communication in unlicensed spectrum are disclosed. Interference between Radio Access Technologies (RATs) may be reduced utilizing CSAT by, for example: receiving signals via a resource, wherein a first RAT is used to receive the signals; identifying utilization of the resource associated with the first RAT, wherein the identification is based on the received signals; cycling operation of a second RAT between activated and deactivated periods of transmission over the resource in accordance with a Time Division Multiplexing (TDM) communication pattern, wherein the cycling is based on the identified utilization of the resource; and transmitting an Activation/Deactivation Medium Access Control (MAC) Control Element (CE) to a user device associated with the second RAT to activate or deactivate the user device in accordance with the TDM communication pattern. | 06-11-2015 |
20150163823 | INTERFERENCE CLASSIFICATION-BASED CARRIER SENSE ADAPTIVE TRANSMISSION (CSAT) IN UNLICENSED SPECTRUM - Systems and methods for Carrier Sense Adaptive Transmission (CSAT) for reducing interference between Radio Access Technologies (RATs) in unlicensed spectrum are disclosed. A small cell base station may receive signals via a resource, wherein a first RAT is used to receive the signals, and classify interference on the resource associated with the first RAT based on the received signals. Based on the interference classification, one or more cycling parameters may be set for a Time Division Multiplexing (TDM) communication pattern defining activated and deactivated periods of transmission for a second RAT sharing the resource, and operation of the second RAT may be cycled between activated and deactivated periods of transmission over the resource in accordance with the TDM communication pattern. | 06-11-2015 |
20150163825 | CARRIER SENSE ADAPTIVE TRANSMISSION (CSAT) COMMUNICATION SCHEME DETECTION AND MITIGATION IN UNLICENSED SPECTRUM - Systems and methods for Carrier Sense Adaptive Transmission (CSAT) communication scheme identification and mitigation in unlicensed spectrum are disclosed. The identification may comprise, for example, identifying CSAT communication based on a presence of a first signal and an absence of a second signal of a Radio Access Technology (RAT) during a period of time. The mitigation may comprise, for example, limiting transmission of at least a first signal by the RAT on a resource for a period of time associated with an adaptable duty cycle used for the CSAT communication, and transmitting a second signal by the RAT on the resource during the period of time. | 06-11-2015 |
20150223077 | METHODS FOR INTER-OPERATOR COEXISTENCE ON SHARED SPECTRUM OR UNLICENSED BANDS - To enable coexistence in unlicensed bands or other shared spectrum, operators that deploy cellular coverage in unlicensed bands can broadcast and receive over-the-air (OTA) signaling messages that carry coexistence information such that the operators can adjust one or more parameters used to provide the cellular coverage in the unlicensed bands and thereby enable inter-operator coexistence. For example, the operators may coordinate the particular OTA signaling configuration used to carry the coexistence information and thereby enable each operator to learn information that the other operator(s) are using and thereby reduce interference on time, frequency, and/or spatial resources that may be shared among the operators providing the cellular coverage in the unlicensed bands. Furthermore, a user equipment (UE) that receives and decodes the OTA signaling messages exchanged among the operators may adjust one or more measurement parameters and/or operating parameters according to the coexistence information carried in the OTA signaling messages. | 08-06-2015 |
20150236782 | CARRIER SENSE ADAPTIVE TRANSMISSION (CSAT) MEASUREMENTS IN SHARED SPECTRUM - Techniques for managing operation on a communication medium shared between Radio Access Technologies (RATs) are disclosed. The management may comprise, for example, monitoring the medium for first RAT signaling in accordance with a first RAT; determining a utilization metric associated with utilization of the medium by the first RAT signaling; cycling operation in accordance with a second RAT between activated periods and deactivated periods of communication over the medium in accordance with a Time Division Multiple Access (TDM) communication pattern based on the utilization metric; and periodically disabling the cycling to provide an AOS period of activated communication over the medium for operation in accordance with the second RAT, with the AOS period being longer than an individual activated period of the TDM communication pattern. The management may also comprise, for example, techniques for enabling/disabling monitoring by an access terminal in accordance with the TDM communication pattern. | 08-20-2015 |
20150288566 | METHODS AND APPARATUS FOR ASSISTED RADIO ACCESS TECHNOLOGY SELF-ORGANIZING NETWORK CONFIGURATION - The present methods and apparatus relate to managing interference associated with a configuration of a self-organizing network (SON) during wireless communication, comprising receiving, at a first radio access technology (RAT) entity, measurement information from a user equipment (UE) for assisting with interference management at a second RAT entity, wherein the first RAT entity is collocated with the second RAT entity; and configuring the second RAT entity based at least in part on the measurement information received by the first RAT entity. In a further aspect, the present methods and apparatus comprise embedding, by a first RAT entity, RAT entity-specific information of a second RAT entity in a management indication, wherein the first RAT entity and the second RAT entity are collocated; and transmitting the management indication to one or both of a UE and another first RAT entity. | 10-08-2015 |
20150289201 | METHOD AND APPARATUS FOR AN IMPROVED MECHANISM FOR SELECTING AN ACCESS POINT - The present disclosure presents a method and apparatus for identifying an access point (AP) for selection by an access terminal (AT). For example, the method may include receiving a probe request by one or more APs from an AT, wherein the probe request is broadcasted by the AT to the one or more APs, generating load information and Received Signal Strength Indicator (RSSI) values of the probe request at the one or more APs, identifying an AP of the one or more APs for selection by the AT, wherein the AP for selection by the AT is identified by the one or more APs based at least on the load information and RSSI values generated at the one or more APs, and transmitting information of an AP identified by the one or more APs to the AT. As such, an improved mechanism for selecting an access point may be achieved. | 10-08-2015 |
20150296384 | CLASSIFICATION-BASED ADAPTIVE TRANSMISSION IN UNLICENSED SPECTRUM - Techniques for communication management between Radio Access Technologies (RATs) sharing operating spectrum in an unlicensed band of radio frequencies are disclosed. Interference may be mitigated by, for example, receiving signaling via a resource. A first RAT may be used to receive the signaling. Based on the received signaling, utilization of the resource associated with the first RAT may be identified. The identified utilization of the resource may be classified based on an attribute associated with the received signaling and a plurality of thresholds associated with the attribute. The plurality of thresholds may define different classes of utilization. Communication by a second RAT over the resource may be adapted based on the classified utilization of the resource. | 10-15-2015 |
20150296413 | METHODS AND APPARATUS FOR ADAPTING TRANSMITTER CONFIGURATION FOR EFFICIENT CONCURRENT TRANSMISSION AND RADAR DETECTION THROUGH ADAPTIVE SELF-INTERFERENCE CANCELLATION - Certain aspects of the present disclosure relate to adapting transmitter configuration for efficient concurrent primary user detection through adaptive self-interference cancellation. A wireless transmitting device may schedule a transmission in a shared spectrum. The device may scan at least a portion of the shared spectrum during the transmission to receive a signal. Interference caused by the transmission may he cancelled from the received signal using self-interference cancellation circuitry. The device may determine whether the received signal indicates usage by a primary user of the shared spectrum. In an aspect, the transmission may be a SISO transmission. In another aspect, carrier aggregation may be used for the transmission and a potential carrier may be subject to primary user detection. The device may determine a self-interference cancellation complexity for a combination of carriers including the potential carrier, and may select one or more carriers for aggregation based on the self-interference cancellation complexity. | 10-15-2015 |
20150296508 | ADAPTIVELY USING SUBFRAMES FOR RADAR DETECTION IN UNLICENSED SPECTRUM - Systems and methods for adaptively using subframes for radar detection in unlicensed spectrum are disclosed. The systems and methods include scheduling a first set of subframes in a frame duration for traffic based at least in part on a first configuration for communications in an unlicensed frequency band. Further, the systems and methods include scheduling, based at least in part on the first configuration, a second set of subframes in the frame duration for detection of a primary user of the unlicensed frequency band. Moreover, the systems and methods include adjusting a number of subframes in the first and second set of subframes based on a second configuration for communications, wherein the second configuration for communications is identified based on a type of primary user being detected. | 10-15-2015 |
20150296560 | DISCONTINUOUS RECEPTION (DRX)-AWARE CARRIER SENSE ADAPTIVE TRANSMISSION (CSAT) IN SHARED SPECTRUM - Systems and methods for Discontinuous Reception (DRX)-aware Carrier Sense Adaptive Transmission (CSAT) communication in shared spectrum are disclosed. An access point, for example, may receive signals via a medium in accordance with a first RAT, and identify utilization of the medium associated with the first RAT based on the received signals. Based on the identified utilization of the medium, operation of a second RAT may be cycled between activated and deactivated periods of transmission over the medium in accordance with a Time Division Multiplexing (TDM) communication pattern. A Medium Access Control (MAC) Control Element (CE) may be transmitted to an access terminal associated with the second RAT to activate or deactivate the access terminal in accordance with the TDM communication pattern. The timing of the MAC CE transmission may be based on the TDM communication pattern and a DRX pattern associated with the access terminal. | 10-15-2015 |
20150304872 | UTILIZING IN-DEVICE COEXISTENCE MESSAGE FOR INTERFERENCE MANAGEMENT IN UNLICENSED BANDS - Described herein are techniques for efficient LTE operation in the unlicensed band. For example, the technique may involve initiating, at the wireless device, a signal measurement of an unlicensed communication band device. The technique may also involve sending, to an access point configured for operation in the unlicensed communication band, a measurement report including the signal measurement of the unlicensed communication band device. | 10-22-2015 |
20150305030 | INTERLACED CARRIER SENSE ADAPTIVE TRANSMISSION (CSAT) CO-EXISTENCE IN SHARED SPECTRUM - Techniques for managing operation over a communication medium shared between Radio Access Technologies (RATs) are disclosed. In one example, one or more parameters of a Time Division Multiplexing (TDM) communication pattern may be set to define activated periods and deactivated periods for communication over the medium. A first interlace may be selected among a plurality of interlaces for communication over the medium, the first interlace being reserved for a first operator. During the first interlace, transmission over the medium may be cycled in accordance with the TDM communication pattern, and deactivated during a second interlace among the plurality of interlaces that is reserved for a second operator. | 10-22-2015 |
20150305040 | CHANNEL SELECTION CO-EXISTENCE IN SHARED SPECTRUM - Techniques for channel selection and related operations in a shared spectrum environment are disclosed. In one example, a channel selector or the like may be used to select one of a number of available channels as an operating channel based on a comparison of cost functions for each of the available channels, with the cost functions being based on separate utility and penalty metrics. In another example, a channel scanner or the like may be used to trigger a channel scan in response to a channel quality metric indicating poor service for a threshold number or proportion of access terminals. In another example, an operating mode controller may be used to trigger a Time Division Multiplexing (TDM) mode on an operating channel in response to a utilization metric being above a threshold. The TDM mode may cycle operation between activated and deactivated periods in accordance with a TDM communication pattern. | 10-22-2015 |
20150305050 | CHANNEL SELECTION METRICS IN SHARED SPECTRUM - Techniques for channel selection and related operations in a shared spectrum environment are disclosed. In one example, a channel selector or the like may be used to select one of a number of available channels as an operating channel based on a comparison of cost functions for each of the available channels, with the cost functions being based on separate utility and penalty metrics. In another example, a channel scanner or the like may be used to trigger a channel scan in response to a channel quality metric indicating poor service for a threshold number or proportion of access terminals. In another example, an operating mode controller may be used to trigger a Time Division Multiplexing (TDM) mode on an operating channel in response to a utilization metric being above a threshold. The TDM mode may cycle operation between activated and deactivated periods in accordance with a TDM communication pattern. | 10-22-2015 |
20150305051 | CHANNEL SELECTION SCANNING IN SHARED SPECTRUM - Techniques for channel selection and related operations in a shared spectrum environment are disclosed. In one example, a channel selector or the like may be used to select one of a number of available channels as an operating channel based on a comparison of cost functions for each of the available channels, with the cost functions being based on separate utility and penalty metrics. In another example, a channel scanner or the like may be used to trigger a channel scan in response to a channel quality metric indicating poor service for a threshold number or proportion of access terminals. In another example, an operating mode controller may be used to trigger a Time Division Multiplexing (TDM) mode on an operating channel in response to a utilization metric being above a threshold. The TDM mode may cycle operation between activated and deactivated periods in accordance with a TDM communication pattern. | 10-22-2015 |
20150311923 | TECHNIQUES FOR DIFFERENTIATING BETWEEN SIGNALS OF DIFFERENT RADIO ACCESS TECHNOLOGIES - Systems and methods for differentiating between LTE and Wi-Fi signals based on distinguishing characteristics thereof are disclosed. A radio or receiver configured for processing signals associated with a first RAT can detect a signal associated with a second RAT, wherein the signals associated with the first RAT and the signal associated with the second RAT are received over a communications medium using an unlicensed frequency spectrum. One or more characteristics of the decoded signal can be detected or identified, such as a pilot or reference signal pattern, an interframe spacing, a cyclic prefix or guard interval structure, a bandwidth utilization, etc. The decoded signal can be determined as relating to the second RAT based at least in part on determining that the one or more characteristics correspond to the second RAT. | 10-29-2015 |
20150319784 | TECHNIQUES FOR OBTAINING AND MAINTAINING ACCESS TO A WIRELESS COMMUNICATION MEDIUM - Techniques are described for wireless communication. One method includes implementing, at a first node, a first access protocol to contend for access to a wireless communication medium shared by a plurality of nodes; determining whether a triggering event has occurred; and implementing, at the first node, a second access protocol to contend for access to the wireless communication medium based at least in part on a determination that the triggering event has occurred. | 11-05-2015 |
20150327282 | METHODS AND APPARATUS FOR CHANNEL SELECTION IN A WIRELESS LOCAL AREA NETWORK - In an aspect, methods and apparatus of communication include detecting a channel reselection condition for triggering reselection from a current channel to a first potential channel. The methods and apparatus further include determining that a first timer value meets or exceeds a first timer threshold value based at least in part on detecting the channel reselection condition. Additionally, the methods and apparatus include selecting the first potential channel from a channel list when the first timer value meets or exceeds the first timer threshold value. In another aspect, methods and apparatus include detecting an initial channel selection condition for triggering selection of a first initial channel. The methods and apparatus further include forming a channel list including one or more channels based on one or more channel selection parameters. Additionally, the methods and apparatus include selecting the first initial channel from the channel list. | 11-12-2015 |