Method of operating relay station in wireless communication system
A method of operating a relay station in a wireless communication system is provided. The method includes operating in a first mode comprising a first sub-mode and a second sub-mode, in the first sub-mode a first downlink and a first uplink between a base station and the relay station being simultaneously activated, in the second sub-mode a second downlink and a second uplink between the relay station and a mobile station being simultaneously activated, and operating in a second mode comprising a third sub-mode and a fourth sub-mode, in the third sub-mode the first downlink and the second uplink being simultaneously activated, in the fourth sub-mode the first uplink and the second downlink being simultaneously activated.
1. A method of operating a relay station (RS) in a wireless communication system, the method comprising:
receiving subframe configuration information through a higher layer from a base station (BS); and
configuring a downlink subframe based on the subframe configuration information,
wherein a first downlink transmission, from the BS to the RS, and a second downlink transmission, from the RS to an user equipment (UE), are performed at different time and in a downlink frequency band and,
wherein a first uplink transmission, from the RS to the BS, and a second uplink transmission, from the UE to the RS, are performed at different time and in an uplink frequency band, and
wherein the downlink subframe is configured for receiving a signal by the first downlink transmission, and
wherein when a frame comprises 10 downlink subframes, the downlink subframe is configured per a specific number of subframes with an exception of a first downlink subframe, a fifth downlink subframe, a sixth downlink subframe and a tenth downlink subframe of the frame.
2. The method of claim 1 , wherein the first downlink subframe, the fifth downlink subframe, the sixth downlink subframe and the tenth downlink subframe in the frame are used for transmitting at least one of a synchronization channel, a broadcast channel, and a paging channel.
3. The method of claim 1 , wherein the subframe configuration information comprises a bitmap used for indicating the downlink subframe.
4. The method of claim 1 , wherein the RS performs at least one hybrid automatic repeat request (HARQ) process regarding the UE.
5. The method of claim 4 , wherein each HARQ process starts every two or more subframes.
6. A relay station (RS) comprising:
a radio frequency (RF) unit for transmitting and receiving a radio signal; and
a processor coupled to the RF unit,
wherein the processor receives subframe configuration information through a higher layer from a base station (BS); and
configures a downlink subframe based on the subframe configuration information,
wherein a first downlink transmission, from the BS to the RS, and a second downlink transmission, from the RS to an user equipment (UE), are performed at different time and in a downlink frequency band and,
wherein a first uplink transmission, from the RS to the BS, and a second uplink transmission, from the UE to the RS, are performed at different time and in an uplink frequency band, and
wherein the downlink subframe is configured for receiving a signal by the first downlink transmission, and
wherein when a frame comprises 10 downlink subframes, the downlink subframe is configured per a specific number of subframes with an exception of a first downlink subframe, a fifth downlink subframe, a sixth downlink subframe and a tenth downlink subframe of the frame.
7. The method of claim 1 , wherein the frame comprises 10 downlink subframes in the downlink frequency band and 10 uplink subframes in the uplink frequency band.