Method and apparatus for transmitting/receiving a signal in a wireless communication system
A method and an apparatus for receiving or transmitting a signal of a relay station in a wireless communication system are provided. The relay station receives or transmits a signal using radio resources indicated by backhaul resource allocation information. In this case, the radio resources include a plurality of symbols in a time domain, and the plurality of symbols have boundaries which are shifted based on symbols included in a frequency band allocated to a macro user equipment. And the radio resources include a plurality of subcarriers in a frequency domain, and at least one subcarrier adjacent to the frequency band allocated to the macro user equipment among the plurality of subcarriers is set to a guard subcarrier.
1. A method of receiving a signal of a relay station in a wireless communication system, the method comprising:
receiving backhaul resource allocation information from a base station; and
receiving backhaul downlink data from the base station by using a radio resource indicated by the backhaul resource allocation information,
wherein the radio resource includes a plurality of symbols in a time domain, and the plurality of symbols have boundaries which are shifted based on symbols included in a frequency band allocated to a macro user equipment, and
wherein the radio resource includes a plurality of subcarriers in a frequency domain, and at least one subcarrier adjacent to the frequency band allocated to the macro user equipment among the plurality of subcarriers is set to a guard subcarrier in which the base station transmits no signal.
2. The method of claim 1 , further comprising transmitting a control signal by the relay station to a relay user equipment, wherein a symbol in a subframe in which the control signal is transmitted is first one or two symbols in the subframe, and the radio resource includes symbols located after the one or two symbols in the subframe.
3. The method of claim 1 , wherein the radio resource includes a plurality of contiguous resource blocks in the frequency domain.
4. The method of claim 3 , wherein the guard subcarrier is included in the resource block adjacent to the frequency band allocated to the macro user equipment among the plurality of resource blocks.
5. A method of transmitting a signal of a relay station in a wireless communication system, the method comprising:
receiving backhaul resource allocation information from a base station; and
transmitting at least one of backhaul uplink data and a control signal to the base station by using a radio resource indicated by the backhaul resource allocation information,
wherein the radio resource includes a plurality of symbols in a time domain, and the plurality of symbols have boundaries which are shifted based on symbols included in a frequency band allocated to a macro user equipment, and
wherein the radio resource includes a plurality of subcarriers in a frequency domain, and at least one subcarrier adjacent to the frequency band allocated to the macro user equipment among the plurality of subcarriers is set to a guard subcarrier in which the relay station transmits no signal.
6. The method of claim 5 , wherein the radio resource includes a guard time in a first symbol of a subframe, and the guard time is shorter than one symbol.
7. The method of claim 6 , wherein the subframe includes a guard time in a last symbol.
8. The method of claim 6 , wherein when the frequency band allocated to the macro user equipment is included in the radio resource, at least one subcarrier located in a boundary of the frequency band allocated to the macro user equipment is not used for signal transmission of the macro user equipment.
9. The method of claim 5 , wherein when the relay station transmits a backhaul sounding reference signal to the base station, the relay station transmits the backhaul sounding reference signal in another symbol other than a symbol in which the macro user equipment transmits a sounding reference signal.
10. A relay station 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 backhaul resource allocation information from a base station and receives backhaul downlink data from the base station by using a radio resource indicated by the backhaul resource allocation information, wherein the radio resource includes a plurality of symbols in a time domain, and the plurality of symbols have boundaries which are shifted based on symbols included in a frequency band allocated to a macro user equipment, and wherein the radio resource includes a plurality of subcarriers in a frequency domain, and at least one subcarrier adjacent to the frequency band allocated to the macro user equipment among the plurality of subcarriers is set to a guard subcarrier in which the base station transmits no signal.