Adaptive channel selection control equalizing sojourn time of sending packets inside wireless stations in wireless access networks

In recent years, wireless networks have been utilized in many situations. However, further increase in network capacity is essential in order to transfer large volume of traffic demanded by many and various clients and applications. By introducing multi-channel environment, network capacity is increased. However, in cases that packet generation rates from wireless stations to a base station are different among wireless stations, all the communication bandwidth over multiple channels is not properly allocated to wireless stations with larger generation rates in particular, even though there is enough available network bandwidth in total. This issue becomes significantly serious in actual wireless access networks where the distance between the base station and each wireless station is different, that means different maximum transmission rate of each station, under the fading condition. Therefore, in this paper, we adaptively allocate proper communication channel, and as a result, adaptive bandwidth to all wireless stations so that they transmit all generated packets by equalizing sojourn time in their sending buffers if there is enough total network bandwidth over all channels. Finally, we show the effectiveness of the proposed method by computer simulation.