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中继与队列相结合的电力线通信AMRS的分组传输方法

DOI: 10.13334/j.0258-8013.pcsee.2014.19.026, PP. 3240-3248

Keywords: 电力线通信,自动抄表系统,分组传输,Markov序列,M/M/1/K排队模型

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Abstract:

为减少电力线信道时变性对自动抄表系统(automaticmeter-readingsystem,AMRS)计量数据传输效率的不利影响,提出了中继路由与分组队列相结合的方法。中继路由将整条通信链路分割成若干子链路,可以有效提高传输效率,但传输效率仍受制于信噪比(signaltonoiseratio,SNR)最低的子链路。为充分利用每条子链路的最大传输效率,在中继路由的基础上,引入了分组队列机制。该方法根据接收和发送子链路的信道状况,动态调整分组队列长度,实现了发送子链路和接收子链路独立传输。由基于SNR的3状态Markov信道模型得到分组的平均发送次数,以该次数表示中继路由的分组接收速率和分组发送速率,建立了基于OPNET的M/M/1/K的AMRS分组排队模型。通过分析不同排队强度时的分组队列长度与队列延时等参数,验证了该方法能够提高传输效率。

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