Patent ID: 7590423
Filing Date: 2009-09-15
Classification: H04W

Abstract:
1. A channel allocation method in a base station (BS) that communicates on at least two channels in a wireless communication system, comprising the steps of: receiving information related to data rates of available channels from mobile stations (MSs) within a cell area of a BS; calculating a variance of the data rates for each channel and arranging the channels according to the calculated variances of data rates for each channel; allocating the channels in a descending order of variances such that a channel having a largest variance is allocated first to an MS having a highest data rate on the channel; and if there is a shortage of channel resources after the channel allocation, reallocating channels allocated to an MS in a best channel condition to an MS having channels insufficient to satisfy a required data rate of the MS from among MSs having more channels than required data rates of the MSs; wherein the reallocation is repeated until a predetermined fairness index is satisfied, and the fairness index is calculated by: wherein, the Measured Throughout is a throughput measured for each MS, the Fair Throughput is a throughput to be assigned to each MS, the Normalized Throughput is a ratio of Measured Throughput to Fair Throughput, the i is 1≦i≦n, and n denotes the number of MSs.