Abstract
When different applications such as Voice communication and Video stream upload exist in the same IEEE 802.11 WLAN, VoIP (Voice over IP) packet delay increases because of the longer packet of Video stream. Therefore, we propose a priority control method by using backoff value with non-uniform probability density. The probability densities of smaller backoff value are increased for VoIP packets, and the probability densities of larger backoff value are increased for Video packets. By using the proposed method, both the throughput improvement of Video stream and short delay of VoIP packets are realized. We perform computer simulation in an environment of Voice communication and Video stream upload applications. As a result of our simulations, the proposed method improves the Video stream throughput by 5.3% while keeping the similar VoIP packet delay to that by AIFSN control.
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