Patent ID: 9237540
Filing Date: 2016-01-12
CPC Classification: H04B,H04W

Claim Text:
1. A source station for synchronization of transmission and reception of data in a cooperative communication system, the source station comprising: a first receiver to receive, from a destination station, a first request frame including information regarding a first point in time when a first response frame is to be transmitted; a first transmitter to transmit the first response frame to the destination station, at the first point in time; a second transmitter to transmit, to a relay station, a second request frame including information regarding a second point in time when a second response frame is to be transmitted; a second receiver to receive the second response frame transmitted by the relay station at the second point in time; and a time estimator to estimate a first propagation delay time between the source station and the relay station, based on a time in which the second response frame is received, wherein the destination station estimates a second propagation delay time between the source station and the destination station, using a time in which the first response frame is received, and estimates a third propagation delay time between the relay station and the destination station, using a third response frame received from the relay station.