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随着无线局城网(wLAN)的流行,在无线局城网上进行实时多媒体应用受到了广泛重视。传统无线局城网没有提供QoS保证,无法胜任实时流的传输。EDCA实现了区分服务,改善了多媒体流的传输质量。本文首先简要介绍了EDCA机制,然后通过理论和模拟分析了基于EDCA无线局域网的VoIP性能,并分析了协议参数设置对VoIP性能的影响。
With the popularity of wireless LANs, real-time multimedia applications in wireless LANs are gaining widespread attention. The traditional wireless city network does not provide QoS guarantees, can not be qualified for real-time streaming transmission. EDCA enables differentiated services and improves the quality of multimedia streaming. This paper first introduces the EDCA mechanism briefly, and then analyzes the VoIP performance based on EDCA wireless LAN by theoretical and simulation, and analyzes the influence of the protocol parameter setting on the VoIP performance.