| 基于多个Markov信道的联合自动请求重发协议 |
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| 引用本文： | 司马苗,周源华,张伟.基于多个Markov信道的联合自动请求重发协议[J].上海交通大学学报,2004,38(Z1):57-62. |
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| 作者姓名： | 司马苗 周源华 张伟 |
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| 作者单位： | 上海交通大学,图像通信与信号处理研究所,上海,200030 |
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| 摘 要： | 讨论了三种在多个并行的Markov信道上进行实时数据传输时使用的选择重发式自动请求重发(SR-ARO)协议.构造了一个简单的多信道数据传输模型.以此为背景,在原有的独立多信道SR-ARQ(IMSR-ARQ)和循环联合SR-ARQ(RJSR-ARQ)的基础上,提出了针对Markov信道的交叉联合SR-ARQ(CJSR-ARQ)协议.并对这三种SR-ARQ协议的性能,主要是数据包的重发尝试次数和接收端的重排缓冲区占用情况,进行了理论分析和软件仿真.结果表明,在仿真中假定的信道条件下CJSR-ARQ可以在保持系统吞吐率不变的情况下,减小数据包重发的次数以及重发次数在不同数据包之间的差别,同时显著地减小了重排缓冲区的占用率.
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| 关 键 词： | 自动请求重发 数据传输 马尔可夫信道 |
| 文章编号： | 1006-2467(2004)S1-0057-06 |
| 修稿时间： | 2003年9月25日 |
Joint Selective Repeat Automatic Repeat reQuest(SR-ARQ) Protocols Based on Multiple Markov Channels |
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| SIMA Miao,ZHOU Yuan-hua,ZHANG Wei.Joint Selective Repeat Automatic Repeat reQuest(SR-ARQ) Protocols Based on Multiple Markov Channels[J].Journal of Shanghai Jiaotong University,2004,38(Z1):57-62. |
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| Authors: | SIMA Miao ZHOU Yuan-hua ZHANG Wei |
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| Abstract: | Three selective repeat automatic repeat request(SR-ARQ) protocols working on multiple Markov channels were analyzed for real-time constrained data transmission. One data transmission system with multiple wireless channels was figured out and discussed. Three SR-ARQ protocols,namely IMSR-ARQ,RJSR-ARQ and CJSR-ARQ, were introduced based on the above system model. Among them, CJSR-ARQ was designed for Markov channels. The performances of the three protocols,including distribution of retransmission trial times and occupancy of re-sequence buffer on receiver side, were analyzed by theory deduction and software simulation. The analysis results show that CJSR-ARQ protocol can minimize the retransmission trial time of packets and packets waiting in the receiver's resequence buffer without affecting the data throughput. |
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| Keywords: | automatic repeat request(ARQ) data transmission Markov channels |
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