Synchronization method and apparatus in device-to-device direct communication
AssigneeElectronics and Telecommunications Research Institute
InventorsHyung Jin KIM, Chanho YOON, Soojung JUNG, Sung Kyung KIM, Seungkwon CHO, Sung Cheol CHANG, DongSeung KWON
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Abstract
A synchronization method by a device is provided in a device-to-device direct communication. The device receives synchronization signals from a plurality of other devices at a current frame, and estimates a synchronization time at a next frame based on the synchronization signals received from the other devices.
Claims20
A synchronization method by a device in a device-to-device direct communication, the method comprising:
- receiving synchronization signals from a plurality of other devices at a current frame;
- and
- estimating a synchronization time at a next frame based on the synchronization signals received from the other devices.
A synchronization method by a device in a device-to-device direct communication, the method comprising:
- determining whether a current frame is a start frame of a superframe,
- selecting a frame for transmitting a synchronization signal when the current frame is the start frame;
- determining whether the current frame is the frame for transmitting the synchronization signal when the current frame is not the start frame;
- receiving synchronization signals from a plurality of other devices to estimate a synchronization time when the current frame is not the frame for transmitting the synchronization signal;
- and
- transmitting a synchronization signal when the current frame is the frame for transmitting the synchronization signal.
A synchronization apparatus in a device-to-device direct communication, the apparatus comprising:
- a transceiver to receive synchronization signals from a plurality of other devices at a current frame;
- and
- a controller to estimate a synchronization time at a next frame based on the synchronization signals received from the other devices.
Dependencies are inferred from the claim text.