Method for allocating reference signals of a backhaul link in a relay communication system, and method and apparatus for transmitting/receiving data using the same
The present invention relates to a method and to an apparatus for transmitting/receiving data in a relay communication system. The method comprises the steps of: setting, as a guard band, the first predetermined number of symbol transmission slots of a data transmission period in a subframe resource element of a downlink channel constituted by a control signal transmission period to which a control signal is allocated and the data transmission period to which downlink data is allocated; allocating reference signals to symbols of the data transmission period; puncturing the symbols corresponding to the guard band from among the symbols to which said reference signals are allocated; and transmitting signals to which said reference signals are allocated.
1. A method for receiving a downlink reference signal by a relay node in a wireless access system, the method comprising:
receiving, from a base station, a configuration related to a resource region for base station-to-relay node transmission symbols and the downlink reference signal for demodulating the base station-to-relay node transmission symbols; and
receiving the downlink reference signal on a preset region of the resource region for the base station-to-relay node transmission symbols according to the configuration,
wherein the resource region for the base station-to-relay node transmission symbols is allocated to part of a downlink subframe configured in symbol units,
wherein the downlink subframe is configured specifically for the base station-to-relay node transmission among several downlink subframes according to a Time Division Duplex (TDD) uplink-downlink configuration for a base station-to-user equipment transmission, and
wherein the downlink reference signal is not located in the last one or more Orthogonal Frequency Division Multiplexing (OFDM) symbols within the downlink subframe when the resource region for base station-to-relay node transmission symbols is allocated to part of the downlink subframe configured in symbol units.
2. An apparatus for receiving a downlink reference signal in a wireless access system, the apparatus comprising:
a receiver; and
a controller operably coupled to the receiver and configured to:
receive, via the receiver from a base station, a configuration related to a resource region for base station-to-relay node transmission symbols and the downlink reference signal for demodulating the base station-to-relay node transmission symbols, and
receive, via the receiver, the downlink reference signal on a preset region of the resource region for the base station-to-relay node transmission symbols according to the configuration,
wherein the controller is configured to allocate the resource region for the base station-to-relay node transmission symbols to part of a downlink subframe configured in symbol units,
wherein the downlink subframe is configured specifically for the base station-to-relay node transmission among several downlink subframes according to a Time Division Duplex (TDD) uplink-downlink configuration for a base station-to-user equipment transmission, and
wherein the downlink reference signal is not located in the last one or more Orthogonal Frequency Division Multiplexing (OFDM) symbols within the downlink subframe when the resource region for base station-to-relay node transmission symbols is allocated to part of the downlink subframe configured in symbol units.