TUNE-AWAY FOR MULTI-SIM MULTI-STANDBY DEVICES

摘要

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.

主权项

1. A method of wireless communication with a multiple subscriber identity module (SIM), multiple standby user equipment (UE), comprising:
communicating with a first radio access technology (RAT), which is time division based, using a transmitter and a receiver, communicating with the first RAT comprising performing uplink transmission on the first RAT with the transmitter and/or receiving downlink communications on the first RAT with the receiver; tuning the receiver from the first RAT to a second RAT and/or frequency to monitor downlink communications on the second RAT and/or frequency; and continue performing the uplink transmission on the first RAT with the transmitter, while tuned to the second RAT on the receiver, the continued performance of the uplink transmission enables a base station to estimate uplink timing of the first RAT and a corresponding downlink beam based at least in part on an uplink transmission from the UE when the receiver is tuned away from the first RAT to the second RAT and/or frequency.