Patent ID: 8855042
Filing Date: 2014-10-07
Classification: H04L,H04W

Abstract:
1. A downlink feedback method for a relay link in a Time Division Dual (TDD) system, comprising: selecting one or more uplink subframes from uplink subframes of a wireless frame as uplink relay subframes used for uplink data transmission, determining a downlink subframe for each uplink relay subframe from downlink subframes of the wireless frame as a downlink relay subframe used for downlink feedback or new data indication, wherein the uplink relay subframe and the downlink relay subframe have a fixed timing sequence relationship; a relay station transmitting uplink data to a network side through an uplink relay subframe, and receiving downlink feedback or new data indication from the network side through a downlink relay subframe corresponding to the uplink relay subframe according to the fixed timing sequence relationship, wherein, the uplink relay subframe and the downlink relay subframe having a fixed timing sequence relationship means that there is a fixed subframe interval k between the uplink relay subframe and the downlink relay subframe, the downlink relay subframe is a k wherein, when the wireless frame adopts an uplink and downlink configuration 1: if only an uplink subframe #8 is selected as the uplink relay subframe for uplink data transmission, the downlink relay subframe is a downlink subframe #4, or downlink subframes #4 and #9; wherein: the downlink subframe #4 is taken as the downlink relay subframe having the fixed timing sequence relationship with the uplink subframe #8, wherein the timing sequence interval k=6; if only an uplink subframe #3 is selected as the uplink relay subframe for uplink data transmission, the downlink relay subframe is the downlink subframe #9, or the downlink subframes #4 and #9; wherein: the downlink subframe #9 is taken as the downlink relay subframe having the fixed timing sequence relationship with the uplink subframe #3, wherein the timing sequence interval k=6; if the uplink subframes #3 and #8 are selected as the uplink relay subframes for uplink data transmission, the downlink relay subframes are the downlink subframes #4 and #9; wherein, the downlink subframe #4 is taken as the downlink relay subframe having the fixed timing sequence relationship with the uplink subframe #8, and the downlink subframe #9 is taken as the downlink relay subframe having the fixed timing sequence relationship with the uplink subframe #3, wherein the timing sequence interval k=6.