Patent application number | Description | Published |
20080267127 | METHOD AND APPARATUS FOR HANDOVER IN A WIRELESS COMMUNICATION SYSTEM - A method and apparatus for handover in a wireless communication system. A handover indication can be received from a source base station ( | 10-30-2008 |
20080268849 | METHOD AND APPARATUS FOR HANDOVER IN A WIRELESS COMMUNICATION SYSTEM - A method and apparatus for handover of a mobile station ( | 10-30-2008 |
20080268850 | METHOD AND APPARATUS FOR HANDOVER IN A WIRELESS COMMUNICATION SYSTEM - A method and apparatus for handover in a wireless communication system. A connection can be established with a mobile station ( | 10-30-2008 |
20090088161 | METHOD FOR ALLOCATING A TEMPORARY RESOURCE REQUEST IDENTIFIER FOR ACCESSING A TARGET BASE STATION - The present invention provides for a method for allocating by a plurality of source base stations of a cellular wireless communication support infrastructure a temporary resource request identifier to a wireless communication device for accessing a target base station. The method includes identifying a list of temporary resource request identifiers associated with the target base station for use by one or more wireless communication devices, wherein the list includes a subset of one or more part time temporary resource request identifiers whose respective assignment to a corresponding grouping of one or more source base stations at a particular time is rotated between more than one of the plurality of corresponding groupings of one or more source base stations. The present invention further provides for allocating a temporary resource request identifier to a wireless communication device for accessing a target base station, where a corresponding one of the temporary resource request identifiers is allocated to a particular wireless communication devices, where the temporary resource request identifier includes a limitation of usage corresponding to particular communication time intervals during which the temporary resource request identifier can be used with the target base station. | 04-02-2009 |
20090149185 | METHOD AND APPARATUS FOR REDUCING MISSED PAGING MESSAGES AND PAGING LATENCY DURING CELL RESELECTION IN A WIRELESS NETWORK - A mobile station anticipates that an asynchronous idle handover or cell reselection is about to occur and just prior to the occurrence will determine if the idle mode handover/cell reselection interval will cause missing of a paging interval and thus a missed paging opportunity using an estimated handover duration. If not, then the mobile station will proceed with the idle mode handover ( | 06-11-2009 |
20090318128 | Preventing Random Access Based on Outdated System Information in a Wireless Communication System - A method for preventing random access by a mobile station with outdated system information including receiving system information earlier than a time at which the system information is effective, determining that a current time is within a new access blocking offset before the time at which the system information is effective, and delaying random access at least until the time at which the system information is effective. | 12-24-2009 |
20100039988 | Preventing Misuse of Random Access Procedure in Wireless Communication System - A method for preventing misuse of a random access procedure in a mobile station including transmitting a random access preamble, receiving a random access response message addressed to an identifier that has a one-to-one association with the random access preamble transmitted by the mobile station, and decoding the random access response message. | 02-18-2010 |
20100041370 | Preventing Misuse of Random Access Procedure in Wireless Communication System - A method for preventing misuse of a random access procedure including transmitting a random access preamble, receiving a random access response message which includes a random access response that is scrambled using the identity of the random access preamble transmitted by the mobile station, checking that the random access response is in response to the random access preamble transmitted by the mobile station, and decoding the random access response. | 02-18-2010 |
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 |
20100234028 | METHOD AND APPARATUS FOR DISTINGUISHING CELLS WITH THE SAME PHYSICAL CELL IDENTIFIER | 09-16-2010 |
20100273489 | Method for Reselections in the Presence of Femto Cells - A method for performing cell reselection in a cellular communication network including determining a first receive power and a first pathloss of a signal from a first cell, determining a second receive power and an upper bound on a second pathloss of a signal from a second cell, and selecting the second cell when the difference between the first path loss and the upper bound on the second path loss is greater than a first threshold and the difference between the first receive power and the second receive power is smaller than a second threshold. | 10-28-2010 |
20100322153 | HARQ ADAPTATION FOR ACQUISITION OF NEIGHBOR CELL SYSTEM INFORMATION - A method in a mobile station including receiving an order from a serving cell for system information acquisition of a neighbor cell, wherein the order includes at least a physical cell identifier and a time limit for acquisition of the system information of the neighbor cell, acquiring the system information of the neighbor cell within the time limit for the acquisition of the system information, and reporting at least a part of the acquired system information to the serving cell. | 12-23-2010 |
20100322169 | Method of Assigning and Managing Gaps for Reading System Information of Neighboring Cells - A method in a mobile station for receiving system information of a neighbor cell, and a corresponding method in a base station transmits an assignment of a gap sequence and an assignment of an acknowledgement resource allocation sequence from a serving cell. The mobile station uses the gap sequence to attempt to receive a system information message (e.g., MIB) of a neighbor cell. If the system information message is successfully decoded, the mobile station transmits an acknowledgement to the serving cell and both the mobile station and the serving cell discontinue the gap sequence and the acknowledgement resource allocation sequence. The gap sequence (and discontinuing the gap sequence) allows fewer subframes to be used by the mobile station to search for system information messages. | 12-23-2010 |
20110039546 | METHOD AND APPARATUS FOR RADIO LINK FAILURE RECOVERY | 02-17-2011 |
20110039552 | METHOD AND APPARATUS FOR RADIO LINK FAILURE RECOVERY | 02-17-2011 |
20110039557 | METHOD AND APPARATUS FOR MOBILE COMMUNICATION DEVICE MEASUREMENT REPORTING | 02-17-2011 |
20110039561 | Mitigation of Uplink Interference from Wireless Communication Device Connected to a Micro Cell - A wireless communication device configured to obtain at least a portion of a power parameter of a first serving cell when connected to the first serving cell, switch the link of the wireless communication device from the first serving cell to a second serving cell, determine, based on the portion of the power parameter, a maximum acceptable transmit power of the wireless communication device for use after the wireless communication device switches its link from the first serving cell to the second serving cell, and limit a transmit power of the wireless communication device, based on the maximum acceptable transmit power, when the wireless communication device is connected to the second serving cell. | 02-17-2011 |
20110039569 | Mitigation of Uplink Interference from Wireless Communication Device Connected to Micro Cell - A wireless communication device and method wherein the device determines pathloss between the wireless communication device and the neighboring non-serving cell in response to an order from a serving cell, determines a maximum acceptable transmit power of the wireless communication device based on the pathloss, and limits a transmit power of the wireless communication device, based on a maximum acceptable transmit power, while the wireless communication device is connected to the serving cell. | 02-17-2011 |
20110044260 | Acknowledgment of Uplink Transmission on Contention Based Resource in Wireless Communication System - A remote unit configured to transmit a message on a contention based uplink resource granted by a base unit wherein the message includes information associated with the remote unit. The remote unit also configured to determine a downlink resource on which the remote unit may receive a response to the message sent on the uplink resource by applying an offset to a predetermined downlink resource wherein the offset is based on the information associated with the wireless communication device. | 02-24-2011 |
20110105128 | SYSTEM INFORMATION MANAGEMENT IN WIRELESS COMMUNICATION SYSTEMS - A method in a wireless communication entity includes storing system information of a first base station when it is within coverage of the first base station and attached to a second base station, determining that the mobile station is no longer within the coverage of the first base station subsequent to storing the system information of the first base station, and deleting the stored system information of the first base station. | 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 |
20110199961 | METHOD FOR PROVIDING A CONTENTION BASED UPLINK CHANNEL - A method, a mobile system, and a user communication device are disclosed. A receiving unit | 08-18-2011 |
20110275374 | HANDOVER DURING CARRIER AGGREGATION OPERATION IN WIRELESS COMMUNICATION NETWORK - Methods for performing handovers and addition of carriers during carrier aggregation operation are described. A mobile station can indicate failure to perform downlink synchronization to some but not all cells of a target eNB, in response to a handover command. The mobile station can activate carriers based on various combinations of transmission of random access preambles, reception of random access response messages and transmission of handover complete messages. A base station can activate carriers based on various combinations of reception of random access preambles, transmission of random access response messages and reception of handover complete messages. | 11-10-2011 |
20110281578 | MINIMIZING MEASUREMENTS DURING CARRIER AGGREGATION IN A WIRELESS COMMUNICATION SYSTEM - A method in a mobile station including configuring the mobile station for carrier aggregation on at least a primary serving cell and a secondary serving cell, configuring the mobile station to perform measurements of cells operating on at least the primary carrier frequency and the secondary carrier frequency, refraining from triggering a measurement report when a neighbor cell operating on the primary carrier frequency is better than the primary serving cell only if a signal level of the primary serving cell is better than a first threshold, and triggering a measurement report when a neighbor cell operating on the secondary carrier frequency is better than the secondary serving cell only if the signal level of the primary serving cell is worse than a second threshold. | 11-17-2011 |
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 |
20120044812 | METHOD AND APPARATUS FOR CHANGE OF PRIMARY CELL DURING CARRIER AGGREGATION - Methods for performing change of primary cell during carrier aggregation operation are described. A mobile station (MS) receives a message to change a primary cell and to perform a random access communication with a new primary cell. Upon receiving a random access response message from the new primary cell, the MS starts transmitting a control channel to the new primary cell. In one embodiment, the MS releases the configuration of an uplink control channel and transmits uplink control information through an uplink shared channel. Upon completion of the primary cell change procedure, the MS starts transmission of an uplink control channel to the new primary cell. | 02-23-2012 |
20120113846 | Idle State Interference Mitigation in Wireless Communication Network - A mobile station is disclosed wherein the mobile station determines interference by assessing one or more frames in a first periodic sequence of frames relative to a reference and, in response to the assessment, monitors transmissions from a base station for paging signals during a second periodic sequence of frames, wherein the second periodic sequence of frames is offset from the first periodic sequence of frames by a predetermined amount. | 05-10-2012 |
20120113847 | Configuring Unscheduled Periods to Enable Interference Reduction in Heterogeneous Networks - A mobile station in a wireless communication network is disclosed. The mobile station includes a transceiver coupled to a processor configured to perform measurements of signals of one or more cells of a wireless communication system during a first set of subframes, to cause the transceiver to transmit a measurement report including at least the measurements of signals of the one or more cells, and to indicate that the measurements of the one or more cells were performed during the first set of subframes. | 05-10-2012 |
20120115485 | Idle State Interference Mitigation in Wireless Communication Network - A method in a mobile station for ranking cells in order to perform reselection from a serving cell to a second cell is disclosed. The method includes detecting a second cell that the mobile station is not allowed to access, determining resources used for transmission of a signal of the second cell, and applying a reselection bias if the resources used for transmission of the signal of the second cell do not substantially overlap resources used for transmission of a signal of the serving cell. | 05-10-2012 |
20120115527 | Configuring Unscheduled Periods to Enable Interference Reduction in Heterogeneous Networks - A mobile station in a wireless communication network is disclosed. The mobile station includes a transceiver coupled to a processor configured to rank a plurality of detected cells according to a signal level metric of the plurality of cells, to determine a first pattern of time periods during which a highest ranked cell is configured to transmit only a restricted set of information, and to perform measurements of cells other than the highest ranked cell, of the plurality of cells, only during the first pattern of time periods. | 05-10-2012 |
20120164948 | INTERFERENCE MITIGATION IN A DEVICE HAVING MULTIPLE RADIOS - A wireless terminal that supports operation on a first wireless technology and operation on a second wireless technology performs a first set of measurements on a received signal on first operating frequency of the first wireless technology, wherein the first set of measurements are performed during time periods that overlap time periods during which the wireless terminal transmits signals of the second wireless technology. The terminal also performs interference avoidance to avoid interference from transmissions of signals of the second wireless technology to reception of signals of the first wireless technology if the first set of measurements indicates interference due to transmission of signals of the second wireless technology by the wireless terminal. | 06-28-2012 |
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 |
20120218904 | METHOD AND APPARATUS FOR POWER HEADROOM REPORTING DURING MULTI-CARRIER OPERATION - A method in a wireless communication terminal supports aggregated carrier access. The terminal is configured to transmit a power headroom report of a first type, determine that a condition for transmission of a power headroom report of a second type is satisfied, and transmits a power headroom report of the second type. In other embodiments, essential power headroom reports are prioritized over non-essential power headroom reports. | 08-30-2012 |
20120329459 | Method for Allocating a Temporary Resource Request Identifier for Accessing a Target Base Station - The present disclosure provides for a method for allocating by a plurality of source base stations of a cellular wireless communication support infrastructure a temporary resource request identifier to a wireless communication device for accessing a target base station. The method includes identifying a list of temporary resource request identifiers associated with the target base station for use by one or more wireless communication devices, wherein the list includes a subset of one or more part time temporary resource request identifiers whose respective assignment to a corresponding grouping of one or more source base stations at a particular time is rotated between more than one of the plurality of corresponding groupings of one or more source base stations. | 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 |
20130083695 | METHOD FOR CONTENTION BASED RANDOM ACCESS ON A SECONDARY CARRIER - A mobile station performs random access method. The method includes receiving, from a first cell, a message identifying a random access preamble to transmit to a second cell, wherein the first and second cell operate on different frequencies. The method also includes determining whether the random access preamble is from a set of contention based random access preambles. In addition, the method includes receiving a random access response message, wherein the random access response message is addressed to a unique identifier of the mobile station; and transmitting, if the identified random access preamble is from the set of contention based preambles, a timing verification message. | 04-04-2013 |
20130083747 | METHOD FOR CONTENTION BASED RANDOM ACCESS ON A SECONDARY CARRIER - A mobile station comprises a wireless transceiver coupled to a processor. The mobile station is configured to receive at the transceiver a control channel transmission on a first frequency from a first cell wherein the control channel transmission is addressed to a unique identifier of the mobile station. The processor is configured to determine that the control channel transmission indicates resources for a data channel. The mobile station is configured to receive at the transceiver a data channel transmission in resources indicated in the control channel transmission, the data channel transmission comprising a first message indicating a first resource for an uplink transmission, wherein the mobile station is configured to transmit, to a second cell on an uplink frequency, a second message using the first resource. | 04-04-2013 |
20130231110 | 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. | 09-05-2013 |
20130242789 | 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. | 09-19-2013 |
20130308485 | 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. | 11-21-2013 |
20130315157 | REDUCING THE EFFECTS OF INTERFERENCE EXPERIENCED BY A COMMUNICATION DEVICE - Disclosed are methods for allowing a wireless communication device (or “user equipment” or “UE”) to receive signaling information when there is a power imbalance between a primary cell (“Pcell”) and a New Carrier Type (“NCT”) secondary cell (“Scell”). In one aspect, the UE reduces its downlink bandwidth to cover only a carrier of the Pcell, receives control signaling information, if present, and then increases its bandwidth to cover carriers of both the Pcell and Scell. | 11-28-2013 |
20140036747 | Method and Apparatus For Receiving A Control Channel - Various methods and apparatuses for receiving a control channel involve a communication device monitoring a first control and receiving information from a network regarding the configuration of a second control channel. The communication device receives an uplink grant from the network; transmits a message to the network, in which the message indicates to the network that the communication device is capable of monitoring the second control channel. The communication device monitors the second control channel based on the configuration information receiving via the first control channel. | 02-06-2014 |
20140071944 | METHOD AND APPARATUS FOR DISTINGUISHING CELLS WITH THE SAME PHYSICAL CELL IDENTIFIER | 03-13-2014 |
20140133462 | METHOD AND APPARATUS FOR DISTINGUISHING CELLS WITH THE SAME PHYSICAL CELL IDENTIFIER | 05-15-2014 |
20140293939 | METHOD AND APPARATUS FOR RECEIVING A CONTROL CHANNEL - Various methods and apparatuses for receiving a control channel involve a communication device monitoring a first control and receiving information from a network regarding the configuration of a second control channel. The communication device receives an uplink grant from the network; transmits a message to the network, in which the message indicates to the network that the communication device is capable of monitoring the second control channel. The communication device monitors the second control channel based on the configuration information receiving via the first control channel. | 10-02-2014 |
20140334293 | OFFLOADING COMMUNICATION FROM A CELLULAR NETWORK TO A WIRELESS LOCAL AREA NETWORK - Disclosed are methods for offloading of communication traffic from a cellular network to a Wireless Local Area Network (“WLAN”). According to various implementations, a wireless device determines a time period during which a wireless channel of the WLAN is busy. This first time period may include multiple channel-busy periods separated by periods during which the channel is not busy. The wireless device determines a second time period that represents interframe spacings associated with the first time period. The wireless device determines a modified channel utilization for the wireless channel based on the first time period and on the second time period. The wireless device reports the modified channel utilization to the cellular network. | 11-13-2014 |
20140341166 | HANDOVER DURING CARRIER AGGREGATION OPERATION IN WIRELESS COMMUNICATION NETWORK - Methods for performing handovers and addition of carriers during carrier aggregation operation are described. A mobile station can indicate failure to perform downlink synchronization to some but not all cells of a target eNB, in response to a handover command. The mobile station can activate carriers based on various combinations of transmission of random access preambles, reception of random access response messages and transmission of handover complete messages. A base station can activate carriers based on various combinations of reception of random access preambles, transmission of random access response messages and reception of handover complete messages. | 11-20-2014 |
20150016428 | METHODS AND DEVICE FOR PERFORMING DEVICE-TO-DEVICE COMMUNICATION - Disclosed are methods for carrying out device-to-device (“D2D”) communication. In one implementation, a user equipment (“UE”) communicates D2D with another UE using uplink radio resources. The first UE receives a downlink signal from a base station and determines the reception time. The first UE also receives a timing advance for uplink communication. Based on the reception time and the timing advance, the first UE determines an uplink transmission time. When transmitting to the second UE, however, the first UE does not transmit at the determined UL transmission time. Rather, the first UE delays its D2D transmission for a period of time that is based on the second UE's uplink timing advance. | 01-15-2015 |
20150029995 | 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. | 01-29-2015 |
20150055567 | METHODS AND DEVICES FOR ALLOCATING RESOURCES IN DEVICE-TO-DEVICE COMMUNICATION - This disclosure sets forth methods and devices for allocating resources in Device-to-Device (“D2D”) communications in which a base station sends a control message containing a D2D resource allocation (e.g., the identity of resource blocks and subframes that can be used for D2D) and a bitmap. The bitmap contains grant-indicator bits that tell each mobile station within the D2D group whether it is permitted to receive or transmit using the allocated D2D resources. | 02-26-2015 |