Patent ID: 8644209
Filing Date: 2014-02-04
Classification: H04B,H04L,H04W

Abstract:
1. A method of relaying data in a relay station of a wireless communication system based on a radio frame consisting comprising a plurality of downlink subframes and a plurality of uplink subframes, the method comprising: receiving, from a base station, a scheduling message at a downlink subframe; and transmitting, to the base station, uplink data at a first uplink subframe or a second uplink subframe according to the scheduling message such that the uplink data is transmitted at the second uplink subframe when the scheduling message comprises a scheduling field that indicates decreasing or increasing a time interval between a time of receiving the scheduling message and a time of transmitting the uplink data, and the uplink data is transmitted at the first uplink subframe when the scheduling message does not comprise the scheduling field, wherein: the first uplink subframe is an uplink subframe shifted by four subframes from the downlink subframe; and the second uplink subframe is an uplink subframe shifted by one subframe from the first uplink subframe.