Packet transmission scheduling against long-term deteriorating channel condition for enhancing TCP throughput in wireless LAN

In wireless LAN, low channel utilization is a serious problem. We have proposed some packet transmission scheduling methods that improve channel utilization by transmitting packets at as high rate as possible through preferential scheduling of packets in proper wireless condition, compared with an existing approach that uses lower transmission rate according to the channel fading around receiver stations. However, in the scheduling methods, enough TCP throughput is not achieved to stations in long-term deteriorating channel condition. Therefore, this paper proposes a new packet transmission scheduling method that allocates transmission opportunities to stations in long-term deteriorating channel for sufficient compensation for interrupted transmission, and demonstrate its effectiveness.