Abstract:
A method of wireless communication manages the positioning of uplink pilot channel transmissions. A random access request is transmitted at a first location indicated in a circuit switched fall back (CSFB) redirection message. The random access request is then retransmitted at a second location when a response is not received for the random access request transmitted at the first location.
Abstract:
An apparatus and method adaptively vary how often to adjust uplink timing in a wireless network. The frequency for adjusting uplink timing is varied based on a measured path loss and/or downlink timing variation.
Abstract:
A user equipment (UE) combines baton and hard handover procedures to reduce handover latency, and improve throughput. In one instance, the UE receives a handover command and in response, substantially simultaneously initiates both a hard handover procedure and a baton handover procedure. When a hard handover response is received before a baton handover response, the UE continues with the hard handover procedure and then aborts the baton handover procedure. When the baton handover response is received before a hard handover response, the UE continues with the baton handover procedure and then aborts the hard handover procedure.
Abstract:
In baton handover in TD-SCDMA communications, a user equipment (UE) may make use of multiple receivers in a receive diversity configuration to reduce call drops during baton handover. Following uplink handover, the UE may tune a first receiver to a target cell while maintaining a second receiver tuned to the source cell. If the UE measures a signal quality of the target cell greater than a signal quality of the source cell the UE tunes the second receiver to the target cell and complete the handover. If the UE measures a signal quality of the source cell greater than a signal quality of the target cell, the UE may switch the first receiver and UL back to the source cell and terminate the handover. Thus the UE may avoid handover to a target cell with poor signal quality.
Abstract:
A user equipment (UE) avoids or reduces delay associated with measuring preferred neighbor cells by scheduling inter frequency measurements based on network indicated offset values provided by a network. In some instances, the UE performs measurements when the UE wakes up from a sleep mode. The UE schedules measurement of a neighbor cell with a lower offset value more frequently or earlier. The offset value can be a Qoffset value.
Abstract:
A user equipment (UE) may achieve fast inter radio access technology (IRAT) measurement and better IRAT handover performance to effectively avoid call drops via smooth IRAT handover to other RATs during Time Division High Speed Downlink/Uplink Packet Access (TD-HSDPA/TD-HSUPA) data transmission. In some instances, the UE may speed up the IRAT measurement by request a resource allocation grant preference from a base station. The request indicates a reduced number of time resources and an increased number of other resources.
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 method of wireless communication is presented. The method includes communicating on an active call associated with a first subscriber identity module. The method also includes maintaining an inactive call associated with a second subscriber identity module in a connected state. The inactive call is not using a microphone and speaker of a UE. The method further includes storing received voice frames of the inactive call.
Abstract:
A method of wireless communication is presented. The method includes monitoring a first RAT for a first paging message with a first receive chain. The method also includes monitoring a second RAT for a second paging message with a second receive chain. The method further includes performing, for the first SIM, an inter-frequency/inter-RAT measurement for the first RAT. The method still further includes performing, for the second SIM, an inter-frequency/inter-RAT measurement for the second RAT.