Carrier allocation method in multi cell orthogonal frequency division multiple access system

A carrier assignment method in a multicell orthogonal frequency division multiple access system, the method comprising:

• a reporting step of assigning, by a base station apparatus, a plurality of carrier blocks orthogonal to each other to a plurality of adjacent sectors, and reporting information on available carrier blocks to a terminal apparatus;
• a known symbol transmission step of transmitting, by the terminal apparatus, a known symbol group to the base station apparatus using all available carriers forming a plurality of available carrier blocks, which are reported to the terminal apparatus by the information on available carrier blocks;
• an estimation step of receiving, by the base station apparatus, the known symbol group transmitted from the terminal apparatus using all the available carriers forming the plurality of available carrier blocks, and estimating an average channel gain of each available carrier block using the received known symbol group;
• an assignment step of comparing, by the base station apparatus, the estimated average channel gains of the plurality of available carrier blocks, and preferentially assigning a carrier block having a large average channel gain as a carrier block to be used by the terminal apparatus;
• and
• a data transmission step of comparing, by the base station apparatus, channel gain of each available carrier in the assigned carrier block to be used by the terminal apparatus, selecting an available carrier having a channel gain equal to or greater than a threshold, and transmitting data by only the selected available carrier.