Abstract:

To protect quality of service(QoS) of high priority data stream in wireless local area networks(WLAN), a multipriority algorithm named multiple reservation dynamic content window(MRDCW) is proposed. First, it adopts request to send(RTS) multiple reservation priority differentiating to decrease the influence to high priority data stream by low priority data load increasing, and then a model is built to verify effectiveness. Second, different priority access category adjusts self contention window adaptively based on channel access status to decrease the influence to high priority data stream by high priority data load increasing. Simulation proves that MRDCW can be adapted to various network statuses and to throughput of high priority stream protection.

Key words: self-adaptive algorithm, multiple reservation, quality of service, priority