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arXiv 0704.1833cs.NI
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802.11e增强型分布式信道接入功能分析

Analysis of the 802.11e Enhanced Distributed Channel Access Function

Inanc Inan, Feyza Keceli, Ender Ayanoglu

摘要:

IEEE 802.11e标准修改了前IEEE 802.11标准的媒体访问控制(MAC)层,用于无线局域网(WLAN)中的服务质量(QoS)提供。802.11e的增强型分布式信道接入(EDCA)功能定义了多个接入类别(AC),包括AC专用争用窗口(CW)大小、仲裁帧间间隔(AIFS)值和传输机会(TXOP)限制,以支持MAC级QoS和优先级。我们提出了一个分析模型的EDCA功能,它结合了一个准确的CW,AIFS,和TXOP分化在任何流量负载。所提出的模型还示出捕获MAC层缓冲区大小对性能的影响。分析和仿真结果进行了比较,以证明所提出的方法的准确性,不同的流量负载,EDCA参数,和MAC层缓冲区空间。

英文摘要:

The IEEE 802.11e standard revises the Medium Access Control (MAC) layer of the former IEEE 802.11 standard for Quality-of-Service (QoS) provision in the Wireless Local Area Networks (WLANs). The Enhanced Distributed Channel Access (EDCA) function of 802.11e defines multiple Access Categories (AC) with AC-specific Contention Window (CW) sizes, Arbitration Interframe Space (AIFS) values, and Transmit Opportunity (TXOP) limits to support MAC-level QoS and prioritization. We propose an analytical model for the EDCA function which incorporates an accurate CW, AIFS, and TXOP differentiation at any traffic load. The proposed model is also shown to capture the effect of MAC layer buffer size on the performance. Analytical and simulation results are compared to demonstrate the accuracy of the proposed approach for varying traffic loads, EDCA parameters, and MAC layer buffer space.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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