US Patent No. 10,560,908


Patent No. 10,560,908
Issue Date February 11, 2020
Title System And Method For Device-to-device Synchronization
Inventorship Philippe Sartori, Plainfield, IL (US)
Deping Liu, Schaumburg, IL (US)
Brian Classon, Palatine, IL (US)
Qiang Li, Beijing (CN)
Assignee Futurewei Technologies, Inc., Plano, TX (US)

Claim of US Patent No. 10,560,908

1. A method, comprising:sending, by a base station, a radio resource control (RRC) signal to a first user equipment (UE), the RRC signal instructing the first UE to transmit a first device-to-device synchronization signal (D2DSS) over a synchronization communication resource when the first UE is in a radio resource control connected (RRC_CONNECTED) state with the base station;
receiving, by the base station, a request to become a synchronization source from a second UE after sending the RRC signal to the first UE; and
determining that the second UE does not satisfy at least one criterion for becoming the synchronization source, and based thereon sending a denial message to the second UE.