关键词: 无线局域网语音服务, 时分多址接入, 服务质量, 无线个域网

Abstract: Wireless Local Area Networks (WLANs) have become a ubiquitous networking technology deployed everywhere. And Voice over Internet Protocol (VoIP) is one of the most popular application and an alternative to traditional Public Switched Telephone Network (PSTN) due to its cost efficiency. Voice over WLAN (VoWLAN) is an emerging application taking advantage of the promising VoIP technology and the wide deployment of WLANs all over the world. By focusing on the lack of Quality of Service (QoS) for application VoWLAN, a new QoS mechanism was proposed. This mechanism applies the central scheduling strategy inspiring from IEEE802.15.3 Wireless Personal Access Network (WPAN)，which allows all nodes to share the channel with Time Division Multiple Access (TDMA) technology. For IEEE802.11b, IEEE802.11e and proposed mechanism, the performance on access delay, jitter, and packet loss rate are compared. Simulation results show our proposed mechanism could improve the access delay，the packet loss rate about 20%, 50% respectively compared to IEEE802.15.3.

Key words: VoWLAN, TDMA, QoS, WPAN