中圖分類(lèi)號(hào)： TN925.93 文獻(xiàn)標(biāo)識(shí)碼： A DOI：10.16157/j.issn.0258-7998.211537 中文引用格式： 王心源，程鵬,，吳斌. IEEE 802.11e EDCA協(xié)議吞吐率性能分析模型[J].電子技術(shù)應(yīng)用,，2022，48(1)：115-118,，123. 英文引用格式： Wang Xinyuan,，Cheng Peng，Wu Bin. Throughput performance analysis model for IEEE 802.11e EDCA protocol[J]. Application of Electronic Technique,，2022,，48(1)：115-118，123.
Throughput performance analysis model for IEEE 802.11e EDCA protocol
Wang Xinyuan1,，2,，Cheng Peng1,，Wu Bin1
1.Institute of Microelectronics of the Chinese Academy of Sciences,，Beijing 100029，China,； 2.School of Microelectronics,，University of Chinese Academy of Sciences，Beijing 100049,，China
Abstract： This paper analyzes the IEEE 802.11e enhanced distributed control access protocol in detail, compares the difference between the distributed coordination function DCF and the enhanced distributed control access EDCA, and proposes a four-dimensional Markov chain model. The model unifies the saturated condition and the unsaturated condition. This model not only considers the freeze state of the backoff timer, the transmission conflict state and the maximum number of retransmissions, but also fully considers the internal conflicts and TXOP transmissions of different access priority streams. Compared with the two-dimensional Markov chain model, this model can accurately predict the throughput of access flows with different priorities in EDCA. At last,，simulation software is used to verify the correctness of the model under saturation conditions.
DCF模型中對(duì)數(shù)據(jù)包進(jìn)行統(tǒng)一處理，無(wú)法保障服務(wù)質(zhì)量(Quality of Service,，QoS),，因此802.11e協(xié)議被引進(jìn)[4]。802.11e協(xié)議提出了一種增強(qiáng)的分布式控制接入(Enhanced Distributed Control Access,，EDCA)協(xié)議,。EDCA引入多個(gè)隊(duì)列承接不同業(yè)務(wù)的數(shù)據(jù)包，隊(duì)列參數(shù)的差異使得不同的業(yè)務(wù)產(chǎn)生優(yōu)先級(jí),，保障QoS特性[5-6],。文獻(xiàn)[7]分析了數(shù)據(jù)流和語(yǔ)音流同時(shí)存在情況下語(yǔ)音流的吞吐率性能。
