移動(dòng)Ad hoc網(wǎng)絡(luò)輪詢接入控制協(xié)議
A Polling Access Control Protocol in Mobile Ad hoc Networks
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摘要: 該文對(duì)Ad hoc網(wǎng)絡(luò)的MAC層協(xié)議進(jìn)行了研究,通過(guò)對(duì)無(wú)線令牌環(huán)協(xié)議(WTRP)進(jìn)行改進(jìn),提出了一種新的具有QoS保障的無(wú)競(jìng)爭(zhēng)的分布式并行無(wú)線輪詢?cè)L問(wèn)協(xié)議(DPWPAP),并采用嵌入Markov鏈和概率母函數(shù)的分析方法,用限定服務(wù)規(guī)則進(jìn)行了系統(tǒng)建模,在系統(tǒng)模型的基礎(chǔ)上得到了系統(tǒng)的平均排隊(duì)隊(duì)長(zhǎng)以及平均等待時(shí)間的解析結(jié)果.理論分析和仿真結(jié)果是一致的,表明該協(xié)議的排隊(duì)等待延遲和平均等待隊(duì)列長(zhǎng)度均比WTRP有很大降低,穩(wěn)定性大大增強(qiáng),更加適用于對(duì)時(shí)延要求較高的業(yè)務(wù).Abstract: After studying the MAC protocol of Ad hoc network and by modifying the Wireless Token Ring Protocol (WTRP), a new uncontested Distributed Parallel Wireless Polling Access Protocol (DPWPAP) that can provide MAC QoS guarantees for Ad hoc network is presented, and the mathematical model is established by the embedded Markov chain theory and the probability generating function method. Based on it, the mean value of queue length and message waiting time are explicitly obtained. The simulation results indicate minor errors are introduced by the established system, and also show that the average delay and average queue length in DPWPAP system are much more lower than in WTRP system, the stability is enhanced highly. As a result, it is a better MAC protocol for the services that require lower delay.
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