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: In a mobile device for wireless communication capable of communicating on multiple radio access technologies (RATs), cell selection may be improved by reusing cell measurements for inter-RAT cell selection. This will reduce the number of cell measurements taken and improve mobile device performance. A time threshold may be used to instigate new cell measurement to prevent cell measurement data from being outdated.

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: Post-hard handover processing in a Time Division—Synchronous Code Division Multiple Access (TD-SCDMA) network may be improved to allow operation of High Speed Packet Access (HSPA) in hard handover. For example, uplink synchronization may be completed concurrent with HSPA to quickly resume HSPA operation in hard handovers. User Equipment (UE) may receive downlink data while completing uplink synchronization. In another example, a unique SYNC_UL code may be assigned to a UE for hard handover. The unique SYNC_UL code allows Node Bs of the TD-SCDMA network to know which UE is performing hard handover. When a Node B is receiving the unique SYNC_UL, the Node B may begin to allocate UL data grants. After receiving UL data from the UE, the Node B may resume High Speed Downlink Packet Access (HSDPA).

Abstract: A method of wireless communication includes determining when all HARQ processes are associated with packages for retransmission. The method also includes determining when no new packages are pending in a UE buffer and when a received grant is insufficient for retransmission of any of the HARQ processes. The method further includes determining possible block sizes supported by each allocated time slot identified in the received grant. The method still further includes retransmitting the package of a selected HARQ process with maximum available power.

Abstract: A method and apparatus for wireless communication stores synchronization channel (SCH) timing for each identified Global System for Mobile Communications (GSM) cell. The stored SCH timing is used to perform base station identity code (BSIC) reconfirmation for an identified GSM cell without frequency correction channel (FCCH) tone detection and initial BSIC confirmation. The stored SCH timing is maintained across a plurality of user equipment (UE) states.

Abstract: Certain aspects of the present disclosure propose techniques for improving redirection in a TD-SCDMA circuit-switched fallback from TDD-LTE systems. Certain aspects provide a method that generally includes initiating a call setup (CS) procedure for leaving a base station (BS) of a first radio access technology (RAT) for a call on a second RAT, receiving, in response to the CS procedure, a message from the BS of the first RAT comprising a system frame number (SFN) for the BS of the first RAT and an offset number for a BS of the second RAT for setting up the call, and generating an estimated SFN for the BS of the second RAT based on the SFN for the BS of the first RAT and the offset number.

Abstract: A method of wireless communication adjusts an absolute inter radio access technology (IRAT) handover threshold for a target radio access technology (RAT). The adjustment occurs when a serving cell signal strength is below a threshold for a serving RAT and the target RAT is successfully acquired during IRAT measurement.

Abstract: A user equipment (UE) including a single receiver tunes away from a first communication entity to perform a communication activity for a second communication entity during a network configured measurement gap associated with a first communication entity. In one instance, the user equipment performs the communication activity for the second SIM when the user equipment determines that a page of the second SIM occurs during the network configured measurement gap. The UE also performs inter radio access technology (IRAT) measurement during the network configured measurement gap.

Abstract: A method and/or apparatus for wireless communication determines whether circuit switched fall back (CSFB) occurred from a first RAT to a second RAT. A call is handed over from the second RAT to the third RAT and a UE attempts to return directly to the first RAT from the third RAT when the CSFB occurred and the call is released from the third RAT.

Abstract: A user equipment (UE) reduces random access procedure delays when reselecting or redirecting from a cell of a first radio access technology (RAT) by preventing a persistence check before initiating the random access procedure. In one instance, the UE prevents the persistence check by preventing collection of system information including a scaling factor used for the persistence check before initiating the random access procedure.

Abstract: A method/apparatus for wireless communication for a multi SIM/multi standby device having a single radio stores an uplink transmission timing of a first radio access technology (RAT) and a first path loss measurement before tuning away from the first RAT to perform an activity with a second RAT. A second path loss of the first RAT is measured after tuning back, and the second path loss measurement is compared to the first path loss measurement. The uplink transmission timing is adjusted based at least in part on the comparison.

Abstract: A user equipment (UE) expedites cell reselection from a higher priority radio access technology (RAT) to a lower priority RAT. In one instance, the UE determines whether a serving cell signal quality exceeds a threshold when a UE is in idle mode. The serving cell is associated with a higher priority RAT. In another instance, the UE performs an expedited search and measurement of cells of a lower priority RAT when the serving cell signal quality is below the threshold by commencing search and measurement before a next discontinuous reception (DRX) cycle scheduled for measurement.

Abstract: A method, an apparatus, and a computer program product for wireless communication are provided in which a first synchronization signal to access to a Node B is transmitted; a request signal from the Node B requesting a second synchronization signal is received; and the second synchronization signal is transmitted to the Node B.

Abstract: 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.

Abstract: In a method of wireless communication, a grant allocating a plurality of high speed subframes for high speed data channels is received before a measurement gap for tuning away from a serving radio access technology (RAT). At least one high speed subframe is allocated in the grant falling within the measurement gap. High speed data is processed only on high speed subframes of the plurality of high speed subframes before and after the measurement gap. An acknowledgement/negative acknowledgement (ACK/NACK) feedback is transmitting and only the high speed subframes of the plurality of high speed subframes before and after the measurement gap are considered.

Abstract: A user equipment (UE) reduces delays during cell reselection for a circuit switched call back (CSFB) voice call in a radio access technology (RAT). In one instance, the UE prevents cell reselection from a first cell of a RAT to a second cell of the same RAT during system information collection of the first cell. In some instances, the preventing is based on a signal strength of the first cell or a signal strength difference between the first cell and the second cell.

Abstract: A method of wireless communication includes adaptively modifying a measurement schedule order for a current discontinuous reception cycle. The method also includes receiving system information for two or more cells. The measurement schedule order is based on a priority of a cell associated with a radio access technology, a frequency, or a combination thereof.

Abstract: An apparatus and method for wireless communication extends a measurement gap in a high speed data network. When it is determined a high speed data channel will fall within a measurement gap, the monitoring of the grant channel corresponding to the high speed data channel is skipped. The measurement gap is extended for inter radio access technology (IRAT) measurement to include the time slot containing the grant channel when the time slot only includes the grant channel corresponding to the high speed data channel that will fall in the measurement gap.

Abstract: A method of wireless communication includes receiving a data grant for multiple retransmission time slots associated with successfully decoded high speed data. The grant is in response to a base station detecting a NACK. The method also includes tuning away from a serving cell during the retransmission time slots.