【摘要】：為減少電力線信道時變性對自動抄表系統(tǒng)(automaticmeter-reading system,AMRS)計量數(shù)據(jù)傳輸效率的不利影響,提出了中繼路由與分組隊列相結(jié)合的方法。中繼路由將整條通信鏈路分割成若干子鏈路,可以有效提高傳輸效率,但傳輸效率仍受制于信噪比(signal to noise ratio,SNR)最低的子鏈路。為充分利用每條子鏈路的最大傳輸效率,在中繼路由的基礎(chǔ)上,引入了分組隊列機(jī)制。該方法根據(jù)接收和發(fā)送子鏈路的信道狀況,動態(tài)調(diào)整分組隊列長度,實現(xiàn)了發(fā)送子鏈路和接收子鏈路獨立傳輸。由基于SNR的3狀態(tài)Markov信道模型得到分組的平均發(fā)送次數(shù),以該次數(shù)表示中繼路由的分組接收速率和分組發(fā)送速率,建立了基于OPNET的M/M/1/K的AMRS分組排隊模型。通過分析不同排隊強(qiáng)度時的分組隊列長度與隊列延時等參數(shù),驗證了該方法能夠提高傳輸效率。
[Abstract]:In order to reduce the adverse effect of power line channel time variability on the transmission efficiency of automatic meter reading system (automaticmeter-reading system,AMRS) measurement data, a method of combining relay routing with packet queue is proposed. Relay routing divides the whole communication link into several sublinks, which can effectively improve the transmission efficiency, but the transmission efficiency is still restricted by the lowest signal-to-noise ratio (signal to noise ratio,SNR) sublink. In order to make full use of the maximum transmission efficiency of each sublink, a packet queue mechanism is introduced on the basis of relay routing. According to the channel condition of the receiving and sending sublink, the packet queue length is adjusted dynamically, and the independent transmission of the sending sublink and the receiving sublink is realized. The average number of packets sent is obtained from the three-state Markov channel model based on SNR. The packet reception rate and packet transmission rate of relay routing are represented by this number, and the AMRS packet queuing model based on OPNET M/1/K is established. By analyzing the parameters such as packet queue length and queue delay at different queue intensities, it is verified that this method can improve the transmission efficiency.
【作者單位】： 華北電力大學(xué)電氣與電子工程學(xué)院;
【基金】：國家自然基金項目(61172075) 中央高校基本科研業(yè)務(wù)費專項資金資助(916111204)~~
【分類號】：TM73

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