Patent ID: 9325555
Filing Date: 2016-04-26
CPC Classification: H04J,H04L,H04W

Claim Text:
1. A method for tracking synchronization between devices in a wireless communication system, the method comprising: receiving, by a receiver and from a transmitter, a tracking signal in a subframe; receiving, by the receiver and from a base station, information on a timing advance (TA) between the transmitter and the base station; and estimating, by the receiver, a timing offset between the transmitter and the receiver by using the received tracking signal, wherein the subframe includes a plurality of orthogonal frequency division multiplexing (OFDM) symbols, wherein the tracking signal is received in a last OFDM symbol of the subframe, wherein the tracking signal includes a sequence repeated N times (N>1) in the last OFDM symbol, and wherein the timing offset is estimated based on the tracking signal and the TA.