Control signal transmitting method and apparatus in relay station

Abstract

A method of transmitting a control signal of a relay station is provided. The method includes: receiving a control signal and data from a base station in a first subframe; and transmitting an acknowledgement/negative acknowledgement (ACK/NACK) signal for the data to the base station in a second subframe, wherein a radio resource for transmitting the ACK/NACK signal is determined by a radio resource to which the control signal received in the first subframe is allocated and by a logical physical uplink control channel (PUCCH) index received by using a higher layer signal.

The invention claimed is: 
     
       1. A method of transmitting a control signal of a relay station, the method comprising:
 receiving, by the relay station, a control signal and data from a base station in a first subframe sub-frame; and 
 transmitting, by the relay station, an acknowledgement/negative acknowledgement (ACK/NACK) signal for the data to the base station in a second subframe sub-frame, 
 wherein a radio resource for transmitting the ACK/NACK signal is determined by a radio resource to which the control signal received in the first subframe sub-frame is allocated and by a logical physical uplink control channel (PUCCH) index received by using a higher layer signal, 
 wherein the logical PUCCH index is allocated first to a PUCCH resource allocated to a macro user equipment coupled to the base station, is allocated second to a PUCCH resource allocated to an Semi-Persistent Scheduling (SPS) ACK/NACK and scheduling request signal resource allocated to the relay station, and is allocated third to a PUCCH resource allocated to a dynamic ACK/NACK resource allocated to the relay station, and 
 wherein the logical PUCCH index indicates the dynamic ACK/NACK resource allocated to the relay station directly or indicates the dynamic ACK/NACK resource allocated to the relay station by the offset value with respect to the logical PUCCH index value transmitted to the macro user equipment. 
 
     
     
       2. The method of  claim 1 , wherein the logical PUCCH index is first allocated to a PUCCH resource which is allocated to a macro user equipment coupled to the base station, and is then allocated to an R-PUCCH resource which is allocated to the relay station. 
     
     
       3. The method of  claim 1 , wherein the logical PUCCH index transmitted to the relay station is an offset value with respect to a logical PUCCH index value which is transmitted to a macro user equipment coupled to the base station. 
     
     
       4. The method of  claim 1 , wherein the logical PUCCH index is first allocated to a Semi-Persistent Scheduling (SPS) radio resource allocated to the macro user equipment coupled to the relay station and the base station and is then allocated to a dynamic radio resource allocated to the relay station and the macro user equipment. 
     
     
       5. The method of  claim 1 , wherein if the relay station fails to receive the control signal in the first frame, the ACK/NACK signal is transmitted through a radio resource determined according to a configuration given by a higher layer signal. 
     
     
       6. An apparatus for wireless communication, the apparatus comprising:
 a signal generator for generating and transmitting a radio signal; and 
 a processor coupled to the signal generator, 
 wherein the processor receives a control signal and data from a base station in a first subframe sub-frame, and transmits an acknowledgement/negative acknowledgement (ACK/NACK) signal for the data to the base station in a second subframe sub-frame, wherein the ACK/NACK signal is allocated to a radio resource determined by a radio resource to which the control signal received in the first subframe sub-frame is allocated and a logical physical uplink control channel (PUCCH) index received by using a higher layer signal, 
 wherein the logical PUCCH index is allocated first to a PUCCH resource allocated to a macro user equipment coupled to the base station, is allocated second to a PUCCH resource allocated to an Semi-Persistent Scheduling (SPS) ACK/NACK and scheduling request signal resource allocated to the relay station, and is allocated third to a PUCCH resource allocated to a dynamic ACK/NACK resource allocated to the relay station, and 
 wherein the logical PUCCH index indicates the dynamic ACK/NACK resource allocated to the relay station directly or indicates the dynamic ACK/NACK resource allocated to the relay station by the offset value with respect to the logical PUCCH index value transmitted to the macro user equipment. 
 
     
     
       7. The method of claim 1, wherein the logical PUCCH, which is allocated for a relay link PUCCH (R-PUCCH) resource, includes backhaul uplink (UL) control information. 
     
     
       8. The method of claim 1, wherein the logical PUCCH index is used to determine a cyclic shift index and frequency used for transmission of an uplink (UL) signal. 
     
     
       9. The apparatus of claim 6, wherein the logical PUCCH, which is allocated for a relay link PUCCH (R-PUCCH) resource, includes backhaul uplink (UL) control information. 
     
     
       10. The apparatus of claim 6, wherein the logical PUCCH index is used to determine a cyclic shift index and frequency used for transmission of an uplink (UL) signal.