Patent ID: 9036759
Filing Date: 2015-05-19
Classification: H04J,H04W

Abstract:
1. A method performed by a first device for performing synchronization of time between devices for a Device-to-Device (D2D) communication, the method comprising: setting the first device to a first group based on at least one of interference information, Quality of Service (QoS), and a service type; outputting a first synchronization signal corresponding to the first group as a signal for setting synchronization time; if a second synchronization signal is received from a second device in a second group, controlling the outputting of the first synchronization signal by applying a time offset according to a relation between the first group and the second group; and if the first synchronization signal and the second synchronization signal are converged at one time, setting a time for synchronization of the first device with the second device as a time point where the first synchronization signal is output.