Tune-away for multi-sim multi-standby devices
AssigneeQUALCOMM Incorporated
InventorsMing Yang, Qingxin Chen, Tom Chin
Life of this patent
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Abstract
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.
Claims20
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.
An apparatus for wireless communication with a multiple subscriber identity module (SIM), multiple standby user equipment (UE), comprising:
- means for 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;
- means for 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
- means for continuing 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.
An apparatus for wireless communication with a multiple subscriber identity module (SIM), multiple standby user equipment (UE), comprising:
- a memory;
- and
- at least one processor coupled to the memory and configured:
- to communicate 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;
- to tune 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
- to 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.
A computer program product for wireless communication with a multiple subscriber identity module (SIM), multiple standby user equipment (UE), comprising:
- a non-transitory computer-readable medium having program code recorded thereon, the program code comprising:
- program code to communicate 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;
- program code to tune 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
- program code to 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.
Dependencies are inferred from the claim text.