Patent application number | Description | Published |
20100112958 | Measurement Report Reliability in Wireless Communcation Systems - A method in a mobile station for measurement reporting in a wireless system including detecting presence of a cell, applying a first filter to a first number of measurement samples of a first measurement quantity of the cell wherein the first number of measurement samples are determined from a switch point, and applying a second filter to a plurality of measurement samples obtained from measurements made subsequent to the first number of measurement samples. | 05-06-2010 |
20100113026 | Efficient Reselections in the Presence of Closed Subscriber Group Cells - A method in a mobile station for avoiding interference to restricted access cells, including detecting presence of a restricted access cell, determining that a measured path-loss is larger than a path-loss threshold, determining that the mobile station is not allowed to access the restricted access cell, and barring a carrier frequency on which the restricted access cell is deployed when the measured path-loss is larger than the path-loss threshold and when the mobile station is not allowed access to the restricted access cell. | 05-06-2010 |
20100118856 | Radio Link Performance Prediction in Wireless Communication Terminal - A wireless communication terminal including a controller coupled to a transceiver wherein the controller is configured to determine a synchronization based on a mapping of channel state information to decoder error rate corresponding to a hypothetical control code word, to attempt to decode a control codeword in a received signal, and to conclude that an out of synchronization event has not occurred if the control codeword is decoded successfully regardless of an indication of the mapping. | 05-13-2010 |
20100122121 | Radio Link Performance Prediction in Wireless Communication Terminal - A method for predicting performance of a radio link in a wireless communication terminal including hypothesizing a second codeword including information associated with a hypothesized first codeword, obtaining channel state information from a received signal, and estimating a decoder error rate of the first codeword under a condition that the second codeword may not be decoded correctly, wherein the decoder error rate is estimated using the channel state information. | 05-13-2010 |
20100195566 | APPARATUS AND METHOD FOR COMMUNICATING AND PROCESSING A POSITIONING REFERENCE SIGNAL BASED ON IDENTIFIER ASSOCIATED WITH A BASE STATION - A base station communicates a positioning reference signal (PRS) to wireless communication devices over a downlink in a wireless communication system by encoding a PRS into a first set of transmission resources, encoding other information into a second set of transmission resources, multiplexing the two sets of resources into a subframe such that the first set of resources is multiplexed into at least a portion of a first set of orthogonal frequency division multiplexed (OFDM) symbols based on an identifier associated with the base station and the second set of resources is multiplexed into a second set of OFDM symbols, and transmitting the subframe. Upon receiving the subframe, a wireless device determines which set of transmission resources contains the PRS based on the identifier associated with the base station that transmitted the subframe and processes the set of resources containing the PRS to estimate timing (e.g., time of arrival) information. | 08-05-2010 |
20100260154 | Method and Apparatus for Generating Reference Signals for Accurate Time-Difference of Arrival Estimation - A base station communicates a positioning reference signal (PRS) to wireless communication devices over a downlink in a wireless communication system by encoding a PRS into a first set of transmission resources, encoding other information into a second set of transmission resources, multiplexing the two sets of resources into a subframe such that the first set of resources is multiplexed into at least a portion of a first set of orthogonal frequency division multiplexed (OFDM) symbols based on an identifier associated with the base station and the second set of resources is multiplexed into a second set of OFDM symbols. Upon receiving the subframe, a wireless communication device determines which set of transmission resources contains the PRS based on the identifier associated with the base station that transmitted the subframe and processes the set of resources containing the PRS to estimate timing (e.g., time of arrival) information. | 10-14-2010 |
20100317343 | Interference Control, SINR Optimization and Signaling Enhancements to Improve the Performance of OTDOA Measurements - A wireless terminal receives signaling information, pertaining to a reference signal transmission in at least one specifically designated sub frame, the signaling information including a list, the list including base station identities. The terminal determines, from at least one of the base station identities in the list, the time-frequency resources associated with a reference signal transmission intended for observed time difference of arrival (OTDOA) measurements from a transmitting base station associated with said one base station identity. The time of arrival of a transmission from the transmitting base station, relative to reference timing, is measured. The wireless terminal can receive a command from a serving cell to start performing inter-frequency OTDOA measurement on a frequency layer containing reference signals, the frequency layer distinct from the serving frequency layer, the serving frequency layer not containing positioning reference signals. The wireless terminal can perform OTDOA measurements subsequent to the reception of the command on a carrier frequency different from the serving cell carrier frequency. A base station transmitter can jointly schedule a reference signal transmission from a plurality of base station transmitters for the purpose of OTD estimation enhancement, and transmit identical reference signals from the plurality of base station transmitters, the reference signals being identical both in the signal sequence and time-frequency resources used for transmission. | 12-16-2010 |
20100323693 | Reselection in a Wireless Communication System - A wireless communication device including a transceiver coupled to a controller configured to cause the transceiver to receive a downlink transmission including a reference signal from a base station while camped on the base station in idle mode, to estimate a quality metric of a hypothetical paging channel reception based on the reference signal, and to determine perform reselection evaluation of a neighboring base stations based on the estimated quality metric. | 12-23-2010 |
20100331009 | Wireless Terminal and Method for Managing the Receipt of Position Reference Singals for Use in Determining a Location - The present invention provides for wireless terminal and a method in a wireless terminal for use in a location determination approach using time of arrival estimates between the wireless terminal and a plurality of base stations in a cellular network. The method includes receiving assistance data from a serving base station for use in receiving a position reference signal used to determine a time of arrival of one or more respective position reference signals from the plurality of base stations relative to a time reference, wherein the assistance data includes a list of base stations, each base station included in the list to be one of used or excluded from use as part of the plurality of base stations for receiving the position reference signal and determining the time of arrival estimate for the received position reference signal. The position reference signal is then received for each of the plurality of base stations, where for each of the plurality of base stations a time of arrival estimate is determined for each of the respective received position reference signals. The time of arrival estimates for each of the plurality of base stations is then forwarded to a location determination entity. | 12-30-2010 |
20110105135 | INTERFERENCE COORDINATION IN HETEROGENEOUS NETWORKS USING WIRELESS TERMINALS AS RELAYS - A method in a wireless communication device and a wireless base station related to spectral efficiency optimization via interference control and mitigation in heterogeneous networks including macro-cells and home-base stations or femto-cells, wherein a mobile station provides a path for coordinating resource utilization between two base stations to facilitate interference coordination and/or mitigation. | 05-05-2011 |
20110110251 | INTERFERENCE MITIGATION IN HETEROGENEOUS WIRELESS COMMUNICATION NETWORKS - A method in a wireless terminal transceiver includes receiving a sequence of frames from a first base station, wherein each frame in the sequence contains a first set of time-frequency resources which may be used for scheduling data and a second set of time-frequency resources not used for scheduling data. The transceiver also receives a message from the first base station identifying a third set of time-frequency resources that is a subset of the first set of time-frequency resources, and estimates the channel state based on the transmission received in the third set of time-frequency resources. | 05-12-2011 |
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 |
20110149868 | APPARATUS AND METHOD FOR COMMUNICATING AND PROCESSING A REFERENCE SIGNAL BASED ON AN IDENTIFIER ASSOCIATED WITH A BASE STATION - A wireless communication device receives at least a section of a subframe from a base station in a wireless communication system. The subframe includes transmission resources multiplexed onto subcarriers of orthogonal frequency division multiplexed (OFDM) symbols. A first set of OFDM symbols includes a reference signal and at least a second set of OFDM symbols includes information other than the reference signal (e.g., channel-coded data). The wireless device determines which OFDM symbols of the subframe constitute the first set of OFDM symbols based on an identifier associated with a base station that transmitted the subframe. The wireless device may then process the reference signal from the OFDM symbols that are determined to be the first set of OFDM symbols. The wireless device may also determine which OFDM symbols of the subframe constitute the second set of OFDM symbols and process non-reference signal information from OFDM symbols of the second set. | 06-23-2011 |
20110149903 | APPARATUS AND METHOD FOR COMMUNICATING AND PROCESSING A REFERENCE SIGNAL BASED ON AN IDENTIFIER ASSOCIATED WITH A BASE STATION - A base station, which includes a processor and a transmitter, communicates a reference signal to wireless communication devices in a wireless communication system. The processor encodes the reference signal into a first set of transmission resources, encodes other information into a second set of transmission resources, and multiplexes the two sets of transmission resources into a subframe, such that the first set of transmission resources is multiplexed into at least a portion of a first set of orthogonal frequency division multiplexed (OFDM) symbols based on an identifier associated with the base station and the second set of transmission resources is multiplexed into a second set of OFDM symbols. The transmitter transmits the subframe to the wireless devices. According to one embodiment, transmission resources for carrying the reference signal may be allocated according to a predetermined allocation, a semi-static allocation, a dynamic allocation, and/or an allocation based on higher layer signaling. | 06-23-2011 |
20110176440 | RESTRICTIONS ON AUTONOMOUS MUTING TO ENABLE TIME DIFFERENCE OF ARRIVAL MEASUREMENTS - A mobile terminal receives a transmission from a base station including a group of Nprs consecutive subframes, where Nprs is a number of subframes constituting the group, and each subframe is capable of transmitting a positioning reference signal (PRS). The group of Nprs consecutive subframes is configured such that a transition between a subframe that does, or does not, include a PRS transmission to a subsequent subframe that does not, or does, include a PRS transmission can occur only after an even number of subframes 2*k, where k=0, 1, 2 . . . . The mobile terminal determines an estimated time of arrival of the transmission from the base station based on a portion of the transmission that includes a PRS transmission. | 07-21-2011 |
20110205914 | Threshold Determination in TDOA-Based Positioning System - A method in a wireless communication terminal including receiving a signal comprising at least a Positioning Reference Signal (PRS) transmission from a serving cell and a PRS transmission from a neighbor cell, estimating a signal quality metric (SQM) based on the PRS transmission from the neighbor cell, estimating a time difference of arrival (TDOA) measurement for the neighbor cell based on the PRS transmissions, determining if the estimated SQM satisfies a criterion, and sending a report to the serving cell that includes at least the estimated TDOA if the criterion is satisfied. | 08-25-2011 |
20120003981 | Signaling Femto-Cell Deployment Attributes to Assist Interference Mitigation in Heterogeneous Networks - There are disclosed methods of a wireless communication device and a wireless base station. The device is served by a serving base station and receives from a neighbor base station a downlink transmission including a broadcast signal. The device decodes the broadcast signal, and determines a bandwidth attribute associated with the neighbor base station based on the broadcast signal. The device then sends to the serving base station a report including the bandwidth attribute associated with the neighbor base station. The wireless base station receives from a first wireless terminal a signal including a bandwidth attribute associated with a neighbor base station. The base station then schedules a second wireless terminal based on the bandwidth attribute of the neighbor base station, in which the first wireless terminal may be identical to the second wireless terminal. | 01-05-2012 |
20120122440 | Positioning Reference Signal Assistance Data Signaling for Enhanced Interference Coordination in a Wireless Communication Network - A method in a wireless communication terminal is disclosed. The method includes receiving a first signal including a desired second signal and an interference component, wherein the interference component includes at least a third signal transmitted in an Almost Blank Subframe (ABS) by a neighbor cell, and configuring the wireless communication terminal to employ interference reduction to process the first signal based on a configuration of the interference component. | 05-17-2012 |
20120122472 | Positioning Reference Signal Assistance Data Signaling for Enhanced Interference Coordination in a Wireless Communication Network - A method in a wireless terminal includes receiving a measurement subframe pattern indicating a first set of subframes on which a transmission from a first base station must be processed, receiving Positioning Reference Signal (PRS) subframe pattern information corresponding to a second base station, determining a subset of the first set of subframes that overlaps with subframes in the PRS subframe pattern information, and processing a transmission received in the subset of the first set of subframes from the first base station. | 05-17-2012 |
20120172041 | METHODS FOR CELL SEARCH IN SYNCHRONOUS INTERFERENCE LIMITED CHANNELS - The cell searcher module (CSM) of a wireless communication device detects that the device is in coverage region of an eNB by processing received signal associated with the primary synchronization (PSCH) and secondary synchronization (SSCH) sequences transmitted by the eNB. The wireless device determines whether candidate SCH signals from candidate neighbor cells are synchronous with SCH sequences from the serving cell by implementing one of three methods. In a first method, the CSM generates a joint estimate of the received power of SSCH sequences corresponding to already detected/identified serving cell and a hypothetical neighbor cell. In a second method, the CSM re-constructs SCH sequences corresponding to already detected cells and subtracts the re-constructed SCH sequences from the received signal to obtain a residual signal with reduced serving cell interference. In a third embodiment, the CSM performs a correlation of estimated channel responses to determine whether the neighbor cell is present. | 07-05-2012 |
20120213095 | IQ Imbalance Image Compensation in Multi-Carrier Wireless Communication Systems - A method in a wireless communication terminal includes receiving an aggregated carrier including a first component carrier and a second component carrier, determining a level of interference from a signal received on the first component carrier to a signal on the second component carrier based on a signal characteristic of the first component carrier and a signal characteristic of the second component carrier, and providing signal interference information to a serving base station if the determined interference level satisfies a condition. | 08-23-2012 |
20120213096 | IQ Imbalance Image Compensation in Multi-Carrier Wireless Communication Systems - A method in a wireless communication terminal includes receiving an aggregated carrier including a first component carrier and a second component carrier, measuring leakage of a reference signal from the first component carrier onto the second component carrier, receiving a signal on the aggregated carrier, and compensating for leakage of the signal from the first component carrier to the second component carrier based on the measurement of the leakage of the reference signal. | 08-23-2012 |
20120214540 | Signal Measurement on Component Carriers in Wireless Communication Systems - A method in a wireless communication device includes performing measurements of a first serving cell on a first carrier frequency at a first rate, determining whether a signal level of a second serving cell on a second carrier frequency exceeds a threshold, and performing measurements of the first serving cell at a second rate if the signal level of the second serving cell is below the threshold, wherein the second rate is higher than the first rate. | 08-23-2012 |
20120214541 | Signal Measurement on Component Carriers in Wireless Communication Systems - A method in a wireless communication terminal including generating a first averaged signal measurement on a first carrier frequency, wherein the first averaged signal measurement is based on a first averaging period, producing a first filter output based on the first averaged signal measurement weighted by a first weight, generating a second averaged signal measurement on the first carrier frequency, wherein the second averaged signal measurement is based on a second averaging period, and producing a second filter output based on the first filter output and based on the second averaged signal measurement weighted by a second weight, wherein the first weight is less than the second weight if the second averaging period is greater than a threshold. | 08-23-2012 |
20120236736 | Method and Apparatus for Multi-Radio Coexistence with a System on an Adjacent Frequency Band Having a Time-Dependent Configuration | 09-20-2012 |
20120257519 | Method and Apparatus for Multi-Radio Coexistence on Adjacent Frequency Bands - A method and apparatus for a co-scheduler can mitigate UE-to-UE adjacent carrier frequency band interference by allocating three sets to a first user equipment uplink. Each set has at least one sub-carrier in a first frequency band, at least one uplink time period, and at least one transmission power parameter. The co-scheduler initially allocates the first set. The co-scheduler allocates the second set in response to detecting a second user equipment operating proximal to the first user equipment, and the second set differs from the first set in either at least one sub-carrier or at least one transmission power parameter. The co-scheduler allocates the third set in response to detecting that the second user equipment is no longer operating proximal to the first user equipment, and the third set differs from the second set in either at least one sub-carrier or at least one transmission power parameter. | 10-11-2012 |
20120281593 | METHOD AND APPARATUS FOR PROVIDING USER EQUIPMENT ACCESS TO TV WHITE SPACE RESOURCES BY A BROADBAND CELLULAR NETWORK - A broadband cellular network (BCN) provides a user equipment (UE) access to TVWS resources. The BCN authorizes the UE to access TVWS resources by conveying a mobile device identifier received from the UE, and a cell identifier associated with the UE's coverage area, to a Federal Communications Commission (FCC)-certified Database and receiving, from the Database, and storing an FCC ID associated with the UE and a set of available TVWS resources. The BCN then conveys, to the UE via a broadband cellular technology, a channel resource information element (CRIE) that includes the cell identifier and identifies the set of available TVWS resources. Subsequently, the BCN re-authorizes the UE to access TVWS resources based on the stored FCC ID and without re-conveying the mobile device identifier to the Database. The BCN further utilizes broadband cellular technology procedures to provide a “virtual” contact verification signal (VCVS) to the UE. | 11-08-2012 |
20120281594 | METHOD AND APPARATUS FOR PROVIDING USER EQUIPMENT ACCESS TO TV WHITE SPACE RESOURCES BY A BROADBAND CELLULAR NETWORK - A broadband cellular network (BCN) provides a user equipment (UE) access to TVWS resources. The BCN authorizes the UE to access TVWS resources by conveying a mobile device identifier received from the UE, and a cell identifier associated with the UE's coverage area, to a Federal Communications Commission (FCC)-certified Database and receiving, from the Database, and storing an FCC ID associated with the UE and a set of available TVWS resources. The BCN then conveys, to the UE via a broadband cellular technology, a channel resource information element (CRIE) that includes the cell identifier and identifies the set of available TVWS resources. Subsequently, the BCN re-authorizes the UE to access TVWS resources based on the stored FCC ID and without re-conveying the mobile device identifier to the Database. The BCN further utilizes broadband cellular technology procedures to provide a “virtual” contact verification signal (VCVS) to the UE. | 11-08-2012 |
20120327866 | Multi-Cluster Uplink Transmission in Wireless Communication Network - A method in a wireless communication device comprises determining transmission powers for at least two clusters, wherein each cluster includes at least one physical resource block (RB), determining a difference in a characteristic of the transmission powers determined for the at least two clusters, and varying a transmit power allocated to at least one cluster if the difference in the characteristic exceeds a power spread threshold, wherein the power allocated to each cluster is a function of pathloss between the wireless communication device and a serving base station. | 12-27-2012 |
20130044831 | POWER ALLOCATION FOR OVERLAPPING TRANSMISSION WHEN MULTIPLE TIMING ADVANCES ARE USED - A method and apparatus for power allocation for overlapping transmissions is provided herein. During operation, user equipment will determine if transmissions to a single base station, on various frequencies, will be overlapping. If so, a determination is made to back off the power for at least one transmission on one frequency. | 02-21-2013 |
20140056228 | MULTI-CLUSTER UPLINK TRANSMISSION IN WIRELESS COMMUNICATION NETWORK - A method in a wireless communication device comprises determining transmission powers for at least two clusters, wherein each cluster includes at least one physical resource block (RB), determining a difference in a characteristic of the transmission powers determined for the at least two clusters, and varying a transmit power allocated to at least one cluster if the difference in the characteristic exceeds a power spread threshold, wherein the power allocated to each cluster is a function of pathloss between the wireless communication device and a serving base station. | 02-27-2014 |
20140198765 | Method and Apparatus for Multi-Radio Coexistence on Adjacent Frequency Bands - Various methods for controlling an aggressor user equipment (UE) can use two transmission power control loops to mitigate UE-to-UE adjacent carrier frequency band interference to a geographically proximal victim UE. The aggressor UE can select between different transmission power parameters based on two (or more) power values. The usage of any particular power value depends on the time period of the transmission. For example, if a proximal victim UE is scheduled to receive when the aggressor UE is scheduled to transmit, a lower power value may be selected as instructed by a co-scheduler or determined by the aggressor UE. The aggressor UE can also send dual power headroom reports to its serving base station based on the two power values. | 07-17-2014 |