Abstract:
A user equipment (UE) determines an uplink timing advance of a target NodeB, such as an uplink dedicated physical channel (DPCH) transmit timing, during handover transition when the UE receives a handover command without a random access configuration. In one instance, the UE modifies a current timing advance of a source eNodeB based on a difference between an uplink timing of the source eNodeB and a downlink timing of the source eNodeB and a difference between an uplink timing of the target NodeB and a downlink timing of the target NodeB. In another instance, the UE determines the uplink timing advance of the target NodeB based on the modified current uplink timing advance of the source eNodeB.
Abstract:
A user equipment (UE) reselects to a higher priority cell even when a cell reselection timer of a low priority cell and/or rank based cell expires before a cell reselection timer of the higher priority cell. In one instance, the UE determines an expiration of a first cell reselection timer for the low priority cell and/or an expiration of a second cell reselection timer for the rank based cell while a third cell reselection timer is running, but not expired. The third cell reselection timer corresponds to the high priority based cell. The UE delays performing cell reselection to the low priority or rank based cell until the high priority based cell is evaluated, even when a cell reselection condition has been stratified for the low priority or rank based cell.
Abstract:
A method of wireless communication is presented. The method includes receiving a grant insufficient for all hybrid automatic repeat request (HARQ) processes waiting for retransmission. The grant may be received after a measurement gap. The method also includes discarding one or more HARQ processes having a timing of previous ACK/NACK feedback coinciding with the measurement gap.
Abstract:
A method of wireless communication includes recording an absolute system frame number (SFN) of a target radio access technology (RAT) and/or recording a relative system frame number (SFN) difference between a serving radio access technology (RAT) and the target RAT. A transmission time interval (TTI) boundary, is determined after redirection, based at least in part on the recorded absolute frame number (SFN) and/or the recorded relative system frame number (SFN) difference.
Abstract:
An optimized strategy for preparing measurement reports in a telecommunication system separates searching and measuring of candidate frequencies for device handover, searching a series of frequencies and then determining which frequencies to measure based on the search results. The search results may be sorted, prioritizing the order measurements are undertaken. Preliminary results may be used to determine that a frequency is a poor handover candidate, advancing to the next frequency.
Abstract:
A different inter radio access technology (IRAT) measurement schedule is provided in the execution phase relative to the IRAT measurement schedule implemented in the preparation phase. To improve the handover performance, the user equipment transmits an IRAT measurement report for multiple neighbor cells and prioritizes the IRAT measurement scheduling for neighbor cells triggering the IRAT measurement report. The prioritizing occurs until an IRAT handover command is received.
Abstract:
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).
Abstract:
A process includes receiving a first communication on a first call associated with a first subscriber identity module (SIM) in an user equipment (UE). The process further includes receiving a second communications on a second call associated with a second SIM in the UE. The process also includes outputting from the UE the received first communications and the received second communications. The process further includes selectively transmitting communications from the UE to an active call selected from one of the first call or the second call.
Abstract:
A method of wireless communication measures a signal strength and/or quality of a target cell. An absolute threshold value is set based at least in part on the rank difference between a serving cell and the target cell. The serving cell and target cell may have the same priority or no network indicated priority. The UE reselects to the target cell when the signal strength exceeds the absolute threshold value.
Abstract:
A user equipment (UE) performs hard handover rather than baton handover when a handover command includes a scheduling request configuration and includes no random access configuration. When the UE receives a handover command including a scheduling request configuration, and no random access configuration, the UE determines the random access configuration for the hard handover based on the scheduling request configuration.