Relay station data transmission method

A method of a relay node transmitting data, the method comprising:

• receiving scheduling information about a backhaul link and data from a base station;
• receiving channel information about an access link from relay node user equipment;
• performing scheduling on the access link based on the scheduling information about the backhaul link and the channel information about the access link;
• and
• relaying the data to the relay node user equipment according to a result of the scheduling,
• wherein the backhaul link means a link between the base station and the relay node, and the access link means a link between the relay node and the relay node user equipment.

A method of a relay node transmitting data, the method comprising:

• transmitting an access link channel measurement reference signal to a relay node user equipment;
• receiving access link channel information about the access link channel measurement reference signal from the relay node user equipment;
• generating scheduling information about an access link based on the access link channel information;
• receiving a backhaul link channel measurement reference signal from a base station;
• transmitting backhaul link channel information, obtained by measuring the backhaul link channel measurement reference signal, and scheduling information about the access link to the base station;
• receiving data to be relayed to the relay node user equipment from the base station;
• and
• transmitting the data to the relay node user equipment based on the scheduling information about the access link.

A method of a relay node transmitting data, the method comprising:

• receiving a backhaul link channel measurement reference signal from a base station;
• transmitting backhaul link channel information about backhaul link channel measurement reference signal to the base station;
• transmitting an access link channel measurement reference signal to a relay node user equipment;
• receiving macro scheduling information about a link between the base station and a macro user equipment, connected to the base station, and data to be relayed to the relay node user equipment from the base station;
• receiving access link channel information about the access link channel measurement reference signal from the relay node user equipment;
• performing scheduling on an access link based on the access link channel information and the macro scheduling information;
• and
• transmitting the data to the relay node user equipment according to a result of the scheduling on the access link.