Patent application number | Description | Published |
20090196196 | CARRIER MANAGEMENT IN A WIRELESS COMMUNICATION DEVICE ASSIGNED A SET OF TWO OR MORE CARRIERS BY A WIRELESS COMMUNICATION NETWORK - Carrier management in a wireless communication device assigned a set of two or more carriers by a wireless communication network is disclosed. In one aspect, a method of carrier management includes transmitting data over the wireless communication network on one or more carriers forming a subset of active carriers from the set of carriers assigned to the wireless communication device. A first performance metric is determined indicative of operating conditions across the set of carriers assigned to the wireless communication device. A desired number of carriers on which to transmit data based on the first performance metric is determined. The desired number of carriers on which to transmit data is compared with the number of carriers in the subset of active carriers. The subset of active carriers is dynamically adjusted based on the comparison and subsequent data is transmitted over the wireless communication network using the adjusted subset of active carriers. | 08-06-2009 |
20090197632 | ALLOCATING TRANSMIT POWER AMONG TWO OR MORE CARRIERS ASSIGNED TO A WIRELESS COMMUNICATION DEVICE - Allocating transmit power among two or more carriers assigned to a wireless communication device is disclosed. In one aspect, a method of allocating transmit power includes determining a total amount of data transmit power available at the wireless communication device for data transmission over the carriers. An efficiency metric is determined for each carrier based on the carrier's transmission characteristics and a portion of the total data transmit power is allocated to each carrier based on each carrier's efficiency metric. | 08-06-2009 |
20100311420 | Apparatus and Method for Improved Idle State Handoff - A method and apparatus for facilitating handoff operations in a wireless communication device is provided. The method may comprise receiving, by a wireless communication device, a plurality of pilot signals, wherein the plurality of pilot signals includes an active pilot signal and one or more candidate pilot signals, selecting at least one nominal active pilot signal strength value for comparison with the active pilot signal, classifying the one or more candidate pilot signals into a respective one of a plurality of tiers based on a handoff factor corresponding to the at least one candidate pilot signal, wherein the plurality of tiers are divided according to one or more handoff factors, and selecting at least one threshold handoff value for each of the plurality of tiers, wherein the at least one threshold handoff value partly depends on one of the at least one nominal active pilot signal strength values. | 12-09-2010 |
20120014258 | EFFECTIVE TIMING MEASUREMENTS BY A MULTI-MODE DEVICE - Certain aspects of the present disclosure relate to a technique for effective measurement in a second Radio Access Technology (e.g., TD-SCDMA) while receiving service in a first Radio Access Technology (e.g., GSM). | 01-19-2012 |
20120314589 | MEASUREMENT SCHEDULING IN CELL_FACH (FORWARD ACCESS CHANNEL) AND CELL_DCH (DEDICATED CHANNEL) STATES BACKGROUND - Methods and apparatus are provided for operating in a first RAN at a working frequency, determining a priority of measurement tasks enabled by the first RAN, and dynamically scheduling the tasks according to the priority. For certain aspects, the first RAN may be a TD-SCDMA network. The measurement tasks are intended to measure at least one parameter of a serving cell in the first RAN on a primary frequency, at least one cell in the first RAN on at least one frequency other than the primary frequency, one or more cells in at least one RAN other than the first RAN (e.g., a GSM network) or any combination thereof. This dynamic assignment allows the UE to make scheduling decisions on which frequencies and RANs to measure, as well as how often these frequencies and RANs are measured, thereby providing for more efficient use of idle slots over conventional haphazard scheduling. | 12-13-2012 |
20130028081 | METHOD AND APPARATUS FOR BALANCING LOAD AND REDUCING CALL BLOCKING IN A TD-SCDMA SYSTEM - A method, an apparatus, and a computer program product for wireless communication are provided in connection with providing a process for balancing loads and reducing call blocking in a TD-SCDMA network. In one example, a user equipment (UE) is equipped to obtain a received signal code power (RSCP) value and a load factor value for each of one or more cells. The UE may be further equipped to rank the one or more cells based on a cell selection value derived from both the RSCP value and the load factor value and select a serving cell from the ranked one or more cells. | 01-31-2013 |
20130034080 | METHOD FOR FAST RETURN TO SOURCE RAT (RADIO ACCESS TECHNOLOGY) AFTER REDIRECTION TO TARGET RAT - A method of wireless communication includes receiving redirection information, from a source radio access technology (RAT), to set up a connection in a target RAT. The redirection information includes a fast return indication. A UE returns to the source RAT in accordance with the fast return indication after call release in the target RAT. | 02-07-2013 |
20130176866 | CALL RECOVERY IN TD-SCDMA HANDOVER FAILURE - A method of wireless communication includes measuring and recording a path loss of a first downlink signal from a source base station, prior to attempting handoff from the source base station to a target base station. The path loss of a second downlink signal from the source base station is measured after unsuccessful handoff from the source base station to the target base station. A UE communicates with the source base station, after unsuccessful handoff, using an uplink timing corresponding to an uplink timing recorded prior to attempting handoff when a difference between the path loss of the first downlink signal and the path loss of the second downlink signal fails to meet a threshold value. A new uplink timing is used when the difference meets the threshold value. | 07-11-2013 |
20130201885 | Short Random Access Channel (RACH) Disabling in TDD-LTE - In TDD-LTE wireless systems, an additional fourth preamble for the random access channel, called short RACH, may be used. If short RACH signaling is to be used, the random access preamble is transmitted in the uplink pilot time slot (UpPTS) field in the special subframe. The location of the uplink pilot time slot (UpPTS) is next to a downlink subframe. Therefore, interference from neighbor base stations may interfere with the short RACH preamble within the uplink pilot time slot. The interference to the short RACH will prevent the eNodeB from detecting the short RACH preamble and thus prevent the UE from accessing the network. An interference level on an Uplink Pilot Time Slot (UpPTS) may be measured and when the interference level exceeds a threshold value a User Equipment (UE) is instructed to disable short Random Access Channel (RACH) signaling. The UE may then be instructed to enable normal RACH. When the interference level falls below the threshold value the UE is instructed to resume short RACH signaling | 08-08-2013 |
20130223354 | HS-SCCH AND HS-SICH ALLOCATION AND MONITORING IN TD-SCDMA MULTI-CARRIER SYSTEMS - In multi-carrier wireless communications control channels are coordinated onto a single reference frequency for scheduling communications with mobile devices. Mobile devices may monitor all available control channels on a single reference frequency rather than over multiple frequencies, thereby reducing CPU processing and power consumption. | 08-29-2013 |
20130260736 | APPARATUS AND METHOD FOR SIGNALING NETWORK CAPABILITIES FOR A WIRELESS DEVICE - Methods and apparatus for wireless communication in a wireless communication network include maintaining a Public Land Mobile Network (PLMN) list and receiving an information request from a network, wherein the information request is associated with configuration parameters associated with the PLMN list. Aspects of the methods and apparatus configuring the UE based on the configuration parameters associated with the PLMN list. Aspects also include replying to the network that the UE is configured with the configuration parameters associated with the PLMN list. | 10-03-2013 |
20130329575 | CHANNEL QUALITY REPORTING - In certain communication systems, such as TD-HSDPA communications, channel quality index (CQI) reporting is based on a predetermined configuration, such as a mobile device (UE) reporting a CQI for a most recently received data transmission. This configuration may lead to errors if a UE reports a CQI for a certain data transmission but the base station (node B) believes the CQI corresponds to a different data transmission, such as a later transmission the UE never received due to an error processing control channel information. Offered is an indicator to accompany CQI reports. The indicator indicates to the node B which communication resource corresponds to the CQI report. | 12-12-2013 |
20130331069 | POWER-BASED FAST DORMANCY - When a user equipment (UE) is communicating wirelessly over a wireless communication network and terminates wireless communication temporarily due to power limit constraints (such as to satisfy a specific absorption rate (SAR) threshold), the UE may maintain its radio access network (RAN) identification (ID) and domain context, in order to quickly resume wireless communication, and avoid upper layer connection setup, once the UE is no longer power limited. | 12-12-2013 |
20130336293 | SCHEDULING INFORMATION REPORTING IN TD-HSUPA SYSTEMS - A method to improve the sending of scheduling information, particularly for Time Division-High-Speed Uplink Packet Access (TD-HSUPA) operation is described. When T-WAIT is configured at a large value which is above a threshold, and when the UE transitions from having a grant to not having a grant, and the TEBS is larger than zero, if the UE does not receive a grant within a time window, the UE may send scheduling information via the E-RUCCH without waiting for the T-WAIT timer to expire. | 12-19-2013 |
20140056155 | INTER RAT MEASUREMENT FROM IDLE TO CONNECTED STATE - A user equipment (UE) may perform an advanced inter radio access technology (IRAT) measurement of a target cell when the UE transitions from an idle state to a connected state of a serving cell to reduce delay. In such instances, the UE compares the serving cell signal metric to a threshold. The advanced measurement may be performed when the serving cell signal metric, e.g., serving cell received signal code power (RSCP), is below the threshold. | 02-27-2014 |
20140071938 | CONFIRMATION OF BASE STATION IDENTIFICATION TO IMPROVE HANDOVER - A method of wireless communication is presented. The method includes receiving an operating frequency and base station identification code (BSIC) for a neighboring base station, determining an expected received signal based from the operating frequency and BSIC, comparing a received signal with the expected received signal, and reporting a result of the comparing. | 03-13-2014 |
20140071939 | INTRA FREQUENCY CELL RESELECTION IN TD-SCDMA - A user equipment (UE) may reduce reselection delays when the UE is in the idle mode. In such instances, the UE adaptively adjusts a cell reselection timer based at least in part on the availability of a downlink time slot resource. The adjustment of the cell reselection timer may be based at least in part on the availability of the downlink time slot resources. The cell reselection timer is adjusted (e.g., shortened or scaled down) when the downlink time slot resources are unavailable to the UE. | 03-13-2014 |
20140086076 | IDLE TIME SLOT ALLOCATION FOR IRAT MEASUREMENT IN TD-HSDPA - A user equipment (UE) dynamically adjusts a decoding time to accommodate a delay associated with decoding a high-speed shared control channel (HS-SCCH) to avoid wasting idle time slots that would otherwise be deemed busy time slots. The UE determines a dynamic protection line that extends beyond a last time slot of a subframe. The dynamic protection line is calculated based on an amount of time to complete the processing and decoding of a control information. This dynamic protection line provides a dynamically determined delay for decoding the HS-SCCH. | 03-27-2014 |
20140098692 | SCHEDULING INTER-RADIO ACCESS TECHNOLOGY (IRAT) MEASUREMENT DURING CONTINUOUS DATA TRANSMISSION - A user equipment (UE) may improve scheduling of inter radio access technology (IRAT) measurement during continuous data transmission, for example in a High Speed-Physical Downlink Shared Channel (HS-PDSCH). The UE may determine whether an IRAT measurement is desired. The UE may also perform the IRAT measurement during a scheduled downlink data subframe when it is determined the IRAT measurement is desired, without losing the scheduled downlink data. | 04-10-2014 |
20140113655 | METHOD AND APPARATUS FOR DETERMINING BASE STATION IDENTITY - Methods for improving the time to acquire an identity of a base station by a mobile station, by relying on locally-unique attributes of the base stations instead of globally-unique attributes of the base stations, are presented. In some embodiments, data may be requested, the data may contain a globally unique attribute of a base station, a first locally unique attribute of the base station, and a second locally unique attribute of the base station. In some embodiments, data may be received in response to the request, the data may contain at least the first locally unique attribute and the second locally unique attribute. It may then be determined that the data did not contain the globally unique attribute, and an identity of the base station based at least in part on the first locally unique attribute and the second locally unique attribute may be acquired. | 04-24-2014 |
20140120959 | ADJUST PAGING INDICATOR CHANNEL DETECTION THRESHOLD DEPENDING ON REMAINING BATTERY LEVEL - A user equipment may save power and improve performance by adjusting a paging indicator detection threshold of power at which a user equipment (UE) determines a paging indicator channel transmission is received when detecting a signal on a paging indicator channel. The adjustment may be based on the UE's remaining battery power. When the battery power level is low, the threshold is increased to reduce false detections. When the battery power level is high, the threshold is decreased to increase the likelihood of detecting the signal on a paging indicator channel. | 05-01-2014 |
20140140223 | INTER RADIO ACCESS TECHNOLOGY (IRAT) MEASUREMENT - A user equipment (UE) may perform an inter radio access technology (IRAT) measurement in time slots not deemed to be carrying critical data. In such instances, the UE only transmits and decodes critical data in the critical time slots when a serving cell signal is low for a determined period of time. Otherwise, when the time slots do not carry critical data, i.e., non-critical time slots, the UE stops transmitting and decoding and uses the non-critical time slots for IRAT measurement. | 05-22-2014 |
20140146742 | APPARATUS AND METHOD OF INTER-RADIO ACCESS TECHNOLOGY SEARCHING - Aspects of radio access technology searching include apparatus and methods for obtaining relative synchronization information between a first radio access technology and a second radio access technology, and determining a time location of a pilot signal of the second radio access technology based on the relative synchronization information. Further aspects include searching for the pilot signal of the second radio access technology using the determined time location. Other aspects further include determining a measurement gap duration and measurement gap location based on the relative synchronization information so as to encompass a pilot of the second radio access technology. | 05-29-2014 |
20140146796 | BUFFER SIZE REPORTING IN TIME DIVISION HIGH SPEED UPLINK PACKET ACCESS (TD-HSUPA) SYSTEMS - A method of wireless communication reports buffer size in TD-HSUPA networks. A protocol data unit is transmitted and an artificial buffer size is reported in response to the transmitted PDU. The artificial buffer size corresponds to the size of a scheduling request. The actual buffer size is reported when a NACK is received or when a round trip timer expires. The actual buffer size corresponds to a PDU retransmit size. | 05-29-2014 |
20140148148 | INTER RADIO ACCESS TECHNOLOGY (IRAT) MEASUREMENT TO IMPROVE USER EQUIPMENT (UE) BATTERY PERFORMANCE - A method of wireless communication enables an inter-radio access technology (IRAT) neighbor cell measurement when a serving RAT signal strength is continuously below a first threshold value for a first length of time. The method also disables the IRAT neighbor cell measurement when the serving RAT signal strength is continuously above a second threshold value for a second length of time. | 05-29-2014 |
20140171070 | EXPANDED NEIGHBOR LIST FOR CELL RESELECTION - A user equipment (UE) may expand a neighbor list available to the UE to avoid neighbor information error caused by an unexpected leakage of distant time division synchronous code division multiple access (TD-SCDMA) cells. The neighbor list, may be expanded by combining previously received neighbor information with currently received neighbor information. In some instances, a new serving cell may be selected from the previously received neighbor list instead of the currently received neighbor list. | 06-19-2014 |
20140179303 | VARYING NEIGHBOR CELL MEASUREMENT PERIODS BASED ON SERVING CELL SIGNAL STRENGTH - A method of wireless communication enables an inter-radio access technology (IRAT) neighbor cell measurement when a serving RAT signal strength is continuously below a first threshold value for a first length of time. The method also disables the IRAT neighbor cell measurement when the serving RAT signal strength is continuously above a second threshold value for a second length of time. | 06-26-2014 |
20140213245 | PARALLEL INTER-RADIO ACCESS TECHNOLOGY (IRAT) MEASUREMENT IN A COMMUNICATION SYSTEM - A UE is configured to collect multiple absolute radio frequency channel numbers (ARFCNs) in parallel via a wideband receiver during a transmission gap. Inter-radio access technology (IRAT) measurements are performed based on the collected AFRCN samples. | 07-31-2014 |
20140213282 | METHODS AND APPARATUS FOR DETERMINING A LOCATION OF A MOBILE STATION - Methods and apparatuses are presented for determining a location of a mobile station. In some embodiments, a mobile station may acquire at least one attribute of a reference base station to obtain the identity of the reference base station. A first and a second locally unique attribute of a local base station may then be acquired. The mobile station may then compute a distance metric from the mobile station to the reference base station based on the at least one attribute, and the first and second locally unique attributes. The location of the mobile station may be determined based at least in part on the distance metric. In some embodiments, the distance metric may include a number of how many base stations away (i.e. “hops” or number of handovers) the mobile station is from the reference base station. | 07-31-2014 |
20140241143 | EARLY TERMINATION OF A BASE STATION IDENTITY CODE PROCEDURE IN TD-SDCMA - An early BSIC (base station identity code) abort procedure includes comparing a first signal strength of a serving cell with a first threshold and comparing a second signal strength of a target cell to a second threshold. The first threshold is a sum of a network indicated threshold and a user equipment (UE) threshold. The second threshold is a difference between the network indicated threshold and the UE threshold. When the first signal strength is below the first threshold and the second signal strength is above the second threshold, the base station identity code (BSIC) procedure is initiated. A number of BSIC failure attempts is adaptively set before terminating the BSIC procedure. | 08-28-2014 |
20140242982 | MEASUREMENT REPORTING TO AVOID STRONG INTERFERENCE - A measurement reporting method to avoid strong interference includes measuring all cells on a neighbor frequency indicated by a network on a neighbor list. A first and second set of cells are identified. The identified first set of cells are from the neighbor list and have a first signal strength a first predefined amount above a serving cell signal strength. The second set of cells are not on the neighbor list and have a second signal strength above a first threshold signal value. The first signal strength of the first set of cells and the second signal strength of the second set of cells are compared to determine whether to send a measurement report for the first set of cells. | 08-28-2014 |
20140254399 | MEASUREMENT REPORTING IN A WIRELESS NETWORK - A measurement reporting method includes measuring a first signal from a first neighbor base station until a first timer expires. Also measured is a second signal from a second neighbor base station until a second timer expires. The first signal is compared with the second signal. A measurement report of the first signal is delayed when the second signal is better than the first signal and the first timer expires prior to the second timer. | 09-11-2014 |
20140269353 | INTER-RADIO ACCESS TECHNOLOGY (IRAT) MEASUREMENT SCHEDULING - A method of wireless communication includes determining whether a serving cell signal strength is below a first threshold. The method also includes determining whether an inter/intra frequency neighbor cell signal strength is below a second threshold. The method further includes determining whether a number of idle traffic time slots for inter-radio access technology IRAT measurements is less than a third threshold. Finally, a frequency of IRAT measurements in time slot zero (TS0), a downlink pilot time slot (DwPTS), an uplink pilot time slot (UpPTS), and a gap (GP) is increased. The increase is based on the determined serving cell signal strength, the determined inter/intra frequency neighbor cell signal strength, and the determined number of idle traffic time slots. | 09-18-2014 |
20140342757 | METHOD AND APPARATUS FOR DETERMINING BASE STATION IDENTITY - Methods for improving the time to acquire an identity of a base station by a mobile station, by relying on locally-unique attributes of the base stations instead of globally-unique attributes of the base stations, are presented. In some embodiments, data may be requested, the data may contain a globally unique attribute of a base station, a first locally unique attribute of the base station, and a second locally unique attribute of the base station. In some embodiments, data may be received in response to the request, the data may contain at least the first locally unique attribute and the second locally unique attribute. It may then be determined that the data did not contain the globally unique attribute, and an identity of the base station based at least in part on the first locally unique attribute and the second locally unique attribute may be acquired. | 11-20-2014 |
20140369312 | ADAPTIVE TRANSMIT POWER CONTROL (TPC) STEP SIZE IN A HIGH SPEED DATA NETWORK - A method of wireless communication includes returning to a base station after a handover failure. The method also includes receiving consecutive transmit power control (TPC) UP commands within a first predetermined time period. The method further includes receiving enhanced uplink dedicated channel uplink control channel (E-UCCH) instances within a second predetermined period. The method further includes increasing a TPC step size after receiving a first predetermined number of consecutive TPC UP commands during the first predetermined time period and after receiving a second predetermined number of E-UCCH instances during the second predetermined time period. | 12-18-2014 |
20140378140 | METHOD AND APPARATUS FOR INTER RADIO ACCESS TECHNOLOGY (IRAT) CELL RESELECTION - The present disclosure presents a method and an apparatus for inter radio access technology (IRAT) cell reselection. For example, the method may include identifying that a user equipment (UE) in an idle or a discontinuous reception (DRX) mode is camped on a cell of a first RAT, determining that the cell the UE is camped on is not broadcasting any neighbor cell of a second RAT, scanning for one or more frequencies of the second RAT based on the determination, and triggering a cell reselection to a cell of the second RAT, wherein the cell of the second RAT is associated with a frequency identified during the scanning. As such, an autonomous IRAT cell reselection may be achieved. | 12-25-2014 |
20150049617 | FCCH BURST DETECTION ABORT METHOD FOR INTER-RADIO ACCESS TECHNOLOGY (IRAT) MEASUREMENT - A system acquisition is initiated to perform inter radio access technology (IRAT) measurement. A waiting period of time is provided before aborting the system acquisition. The period of time is adjustable based on at least one metric. The metric can be a frequency of available measurement gaps, a total number of available measurement gaps, and/or a length of each measurement gap within a subframe. The metric could also be an absolute signal strength of a single neighbor cell and/or a relative signal strength between neighbor cells. The metric could also be a user equipment (UE) measured signal strength compared to a network indicated threshold value for triggering an IRAT measurement report. The metric could also be a percentage of a tone that falls within a measurement gap. | 02-19-2015 |
20150065138 | FREQUENCY HANDOVER WITH INTER-FREQUENCY INTERFERENCE MEASUREMENT - A method of wireless communication includes measuring interference to a primary frequency of a neighbor cell and measuring interference to at least one secondary frequency of the neighbor cell. The method also includes transmitting at least one measurement report based on the interference measurements of the primary frequency and the secondary frequency(ies). | 03-05-2015 |
20150094069 | ENHANCED INTER-RADIO ACCESS TECHNOLOGY HANDOVER PROCEDURES - In an aspect, methods and apparatus for handover in a communication network includes detecting a network entity handover condition to trigger handover from a source network entity of a first RAT. The methods and apparatus further include receiving a handover message from the source network entity of the first RAT including a list of target network entities. Additionally, the methods and apparatus include conducting handover to a target network entity selected from the list of target network entities. In another aspect, methods and apparatus for handover include receiving a handover request message from a UE at a source network entity of a first RAT. The methods and apparatus further include determining a list of target network entities in response to receiving the handover request message. Additionally, the methods and apparatus include transmitting a handover message including the list of target network entities from the source network entity to the UE. | 04-02-2015 |
20150117307 | ADJUSTING PHYSICAL RANDOM ACCESS CHANNEL (PRACH) TRANSMISSION POWER - A method of wireless communication includes modifying an initial transmit power for a subsequent uplink physical channel based on the difference between the desired received powers of the subsequent uplink physical channel and a random access physical channel. When the difference between the desired power of the subsequent uplink physical channel and the random access physical channel is above a predefined threshold, the modification is based on a first adjusted factor. When the subsequent uplink physical channel and random access physical channel are on different frequencies (or time slots) the modification is based on a second adjusted factor. | 04-30-2015 |
20150117319 | SCHEDULING REQUEST WITHOUT RANDOM ACCESS PROCEDURE - A method of wireless communication includes transmitting a scheduling request through a common channel without performing a random access procedure, when uplink data remains in a buffer and no active grant exists during a call. The method also includes receiving a grant and initiating data transmission through an enhanced channel. | 04-30-2015 |
20150119036 | CELLULAR HANDOVER EXECUTION AFTER FIRST NON-BLIND HANDOVER FAILURE - A user equipment (UE) may adjust a time permitted for a UE to attempt blind handover after a first non-blind handover failure to efficiently establish connection with a second radio access technology (RAT) or re-establish connection with a first RAT to increase handover success rate. In some instances, the UE may dynamically adjust the time permitted for acquiring a target RAT cell based on a signal strength of a target cell of the target RAT and/or a signal strength of a serving cell of a serving RAT, after a synchronized handover failed. | 04-30-2015 |
20150119043 | PRUNING TARGET INTER-RADIO ACCESS TECHNOLOGY (IRAT) HANDOVER CANDIDATE CELLS - A method of wireless communication includes determining a threshold based on a signal strength of a strongest candidate target cell of a target radio access technology (RAT) and a previous serving cell of the target RAT. The method also includes pruning a list of candidate target cells of the target RAT based on the threshold. The list is pruned for a handover from a source RAT. The method further includes reporting the pruned list to a base station of the source RAT prior to the handover. | 04-30-2015 |
20150163725 | METHOD AND APPARATUS FOR INTER RADIO ACCESS TECHNOLOGY (IRAT) BPLMN SEARCH - The present disclosure presents a method and an apparatus for inter-radio access technology (IRAT) background public land mobile network (BPLMN) re-acquisition mechanism at a user equipment (UE). For example, the method may include performing a BPLMN acquisition mechanism at a UE, checking whether a BPLMN re-acquisition mechanism is valid, determining whether the re-acquisition mechanism requirements are met, and performing the re-acquisition mechanism at the UE. As such, an IRAT BPLMN re-acquisition mechanism at a UE is performed. | 06-11-2015 |
20150215802 | CONTROLLING A RATE OF FORCED MEASUREMENT GAP USAGE - A method of wireless communication includes controlling a rate of forced measurement gap requests for a serving radio access technology (RAT) to measure a target RAT based on an impact to quality of service on the serving RAT by forced measurement gaps. | 07-30-2015 |
20150249940 | METHOD AND APPARATUS FOR PERFORMING CALL RECOVERY AFTER CALL DROP - Aspects of the methods and apparatus relate to performing call recovery after a call drop. A cell selection update procedure may be initiated to recover a call in response to the call being dropped with a serving cell. Link conditions may be determined for the serving cell and for different candidate cells. The aspects of the methods and apparatus also include selecting a cell, based on the link conditions, from among the serving cell and a candidate cell with a highest signal power parameter in a Primary Common Control Physical Channel (PCCPCH) across a set of neighboring frequencies of the different candidate cells. Call recovery may be performed using the selected cell. In some aspects, the highest signal power parameter may be a highest Received Signal Code Power (RSCP). | 09-03-2015 |
20150264603 | METHODS AND APPARATUS FOR HANDLING TIME-TO-TRIGGER DURING INTRA-RAT CELL RESELECTION AND HANDOVER - In an aspect of the disclosure, a method of wireless communication is provided. The method may include starting a first timer for changing to a first network cell with a first radio access technology (RAT) and starting a second timer for changing to a second network cell with a second RAT. Further, the method may include changing to the first network cell when the first timer expires. The method may also include determining that the second network cell satisfies a cell change condition and continuing to run the second timer after the change to the first network cell in response to the second network cell satisfying the cell change condition. The method may further include changing to the second network cell after starting a third timer for a third network cell with the first RAT, a duration of the second timer being longer than a duration of the third timer. | 09-17-2015 |
20150282010 | METHOD AND APPARATUS FOR SELECTING A CELL DURING CALL ORIGINATION - Methods and apparatuses relating to wireless communication of a user equipment (UE) are provided including receiving an indication to perform a call origination procedure when communicating in a serving cell, selecting a neighbor cell for performing the call origination procedure based at least in part on receiving the indication and performing the call origination procedure with a wireless network using the neighbor cell after selecting the neighbor cell in response to receiving the indication. Selecting the neighbor cell can include performing reselection or switching subscriptions in a multiple subscription UE while delaying the call origination procedure until after the selection. | 10-01-2015 |
20150289153 | METHOD AND APPARATUS FOR ENHANCED TD-SCDMA TO LTE MEASUREMENT REPORTING - Aspects of the methods and apparatus include determining that a time-to-trigger (TTT) timer has expired, and determining that a serving radio access technology (RAT) received signal characteristic is less than a signal characteristic threshold when the TTT timer has expired. Further, the aspects include determining, in response to the serving RAT received signal characteristic being less than the signal characteristic threshold, that a target RAT frequency measurement associated with a Measurement Report Message (MRM) for performing an inter-RAT (IRAT) handover cannot be completed within a time limit according to a current measurement gap configuration. Also, the aspects include calculating a measurement gap duration sufficient to complete the target RAT frequency measurement associated with the MRM for performing the IRAT handover, and configuring a new measurement gap prior to the time limit, wherein the new measurement gap comprises the calculated measurement gap duration. | 10-08-2015 |
20150289314 | TUNE-AWAY FOR MULTI-SIM MULTI-STANDBY DEVICES - A multi-subscriber identity module (SIM) multi-standby user equipment (UE) improves recovery of an original operation of a first radio access technology (RAT) when the UE tunes away from the first RAT. In some instances, the UE communicates with the first RAT on a transmit chain and a receive chain and then tunes to a second RAT on the receive chain to monitor downlink communications or activities of the second RAT. The UE transmits on the first RAT over the transmit chain, while tuned to the second RAT. Thus, the UE continues to perform uplink transmission when the UE tunes away, which allows a base station of the first RAT to track the UE for downlink beam-forming. | 10-08-2015 |
20150319666 | METHOD AND APPARATUS FOR FAST HANDOVER EVALUATION - Methods and apparatus for wireless communication for improving handover between a network and a user equipment (UE) when a measurement report is received. Aspects of the methods and apparatus relate to determining the quality of a serving cell associated with a fast handover performance threshold. When the fast handover performance threshold is breached, the UE may transmit a measurement report requesting a handover to a target cell. Upon requesting a handover to a target cell when the fast handover performance threshold is breached, the UE receives a handover trigger allowing handover to a target cell. | 11-05-2015 |
20150334553 | RADIO LINK CONTROL STATUS PROTOCOL DATA UNIT HANDLING - A method of wireless communication with a multi subscriber identity module (SIM) multi standby UE includes tuning away from a data call on a first SIM to perform an activity for a second SIM. The method also includes tuning back to the data call on the first SIM and delaying, for a predetermined time period, a layer 2 message after tuning back. The layer 2 message can be a protocol data unit (PDU) status transmission in response to receiving a polling bit, a radio link control (RLC) protocol data unit (PDU) polling bit transmission, or
| 11-19-2015 |
20150334740 | HIGH-SPEED TUNE-AWAY FOR MULTI-SIM DEVICES - A user equipment (UE) prevents re-transmissions of downlink high-speed data during a tune away procedure when an acknowledgment (ACK) to the high-speed data is not received at a network. In one instance, the UE decodes a first high-speed grant and corresponding downlink high-speed data before tuning away from a serving base station. The UE determines that a first timing for transmitting an acknowledgement of the decoded high-speed downlink data occurs during a tune away gap. The UE determines a second time for sending the acknowledgment based on a determination of a second high-speed grant missed during the tune away gap. The UE transmits an acknowledgement (ACK) for the decoded downlink high-speed data in accordance with a time line of the missed second high-speed grant. | 11-19-2015 |