Method and apparatus for time synchronized handover
AssigneeHuawei Technologies Co., Ltd.
InventorWilliam Anthony Gage
Life of this patent
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Abstract
Method and apparatus, performed autonomously in a user equipment (UE), for autonomous handover to a target cell of a radio access network (RAN). The method comprises determining, by the UE, an identity of the target cell; receiving, by the UE, a precise time reference broadcast by the target cell, the precise time reference indicating an elapsed time from a predetermined epoch; deriving, by the UE, an uplink timing adjustment based at least in part on the precise time reference, the uplink timing adjustment establishing uplink communication synchronization with the target cell; and transmitting, by the UE, an uplink signal to the target cell in accordance with the derived uplink timing adjustment.
Claims20
A method for autonomous time synchronized handover from a source cell of a radio access network (RAN) to a target cell of the RAN, the method comprising:
- selecting, by a user equipment (UE), the target cell of the RAN for receiving an uplink transmission from the UE;
- receiving, by the UE, a precise time reference broadcast by the target cell, the precise time reference indicating an elapsed time from a predetermined epoch;
- deriving, by the UE, an uplink timing adjustment based at least in part on the precise time reference, the uplink timing adjustment establishing uplink communication synchronization with the target cell;
- and
- transmitting, by the UE, the uplink transmission in accordance with the derived uplink timing adjustment.
A user equipment (UE) comprising:
- one or more processors;
- a radio interface;
- and
- a non-transitory memory storing instructions which, when executed by the one or more processors cause the one or more processors to:
- select a target cell of a radio access network (RAN) for receiving an uplink transmission;
- receive, using the radio interface, a precise time reference broadcast by the target cell, the precise time reference indicating an elapsed time from a predetermined epoch;
- derive an uplink timing adjustment based at least in part on the precise time reference, the uplink timing adjustment establishing uplink communication synchronization with the target cell;
- and
- transmit, using the radio interface, the uplink transmission to the target cell in accordance with the derived uplink timing adjustment.
Dependencies are inferred from the claim text.