Method for allocating subchannel in wireless network

A method for allocating subchannels in a wireless network wherein a plurality of users are subscribed in the wireless network, a base station has NT transmission antennas, a user i has NR reception antennas, a network capacity determined by the NT transmission antennas and K subcarrier groups is divided into K transmission subchannel groups, and a network bandwidth determined by the NT transmission antennas is divided into the K subchannel groups;

• wherein the base station sequentially allocates channels to the plurality of users on the basis of a proportional value of a data transmission rate supported to each user and an average throughput of each user in a predetermined time and a service quality required by each user, wherein a desired service quality of said each user is a minimum allowable data transmission rate of the user;
• the method comprising:
• a step (a) of calculating a relative weight between the users by said base station on the basis of a minimum allowable data transmission rate φi of each user subscribed in the system in each predetermined time slot 1;
• a step (b) of calculating φiSDRc(i)/Ti for all the users of the entire system by said base station on the basis of a data transmission rate SDRc(i) supported from the user i of a current c-th subchannel and an average throughput Ti of each user in a window having a predetermined past length tc;
• a step (c) of selecting the user i having a maximum value of φiSDRc(i)/Ti and allocating the subchannel c to the user i by the base station;
• and
• a step (d) of executing said steps (a) to (c) for all channels by the base station.