无线组播网络中应用网络编码的动态组合重传算法

发布时间：2018-01-08 10:33

本文关键词：无线组播网络中应用网络编码的动态组合重传算法　出处：《西安交通大学学报》2016年12期 　论文类型：期刊论文

【摘要】：针对无线组播网络中降低数据包重传次数及对抗信道衰落、建立稳定无线连接的需求,提出了一种基于网络编码的动态组合重传算法。该算法采用动态线性组合编码算法(DLCCA),以提高无线组播网络带宽利用效率。首先,利用发送端向用户发送原始数据包;其次,通过组播网络的控制信道,发送端获取了网络用户的接收状态,对未正确解码的数据包进行编码,并在传输过程中根据网络状态采用动态组合策略来形成网络编码包,从而有效提高了网络的整体吞吐量。与此同时,还进一步提出了低复杂度编码算法,并分析了所提编码算法的性能,获得了相应的理论分析结果。仿真实验表明,与传统的无编码算法和XOR网络编码算法相比,动态组合重传算法可以显著减少30%的数据重传次数,提高了网络吞吐量。
[Abstract]:In order to reduce the number of packet retransmission and counter channel fading in wireless multicast network, a stable wireless connection is established. This paper presents a dynamic combined retransmission algorithm based on network coding, which uses DLCCAA algorithm to improve the bandwidth utilization efficiency of wireless multicast networks. Using the sending end to send the original data packet to the user; Secondly, through the control channel of the multicast network, the sender obtains the receiving state of the network users, and encodes the packets that are not decoded correctly. In the process of transmission, dynamic combination strategy is adopted to form the network coding packets according to the network state, which effectively improves the overall throughput of the network. At the same time, a low complexity coding algorithm is further proposed. The performance of the proposed coding algorithm is analyzed and the corresponding theoretical analysis results are obtained. The simulation results show that the proposed algorithm is compared with the traditional non-coding algorithm and the XOR network coding algorithm. Dynamic combined retransmission algorithm can significantly reduce the number of data retransmissions by 30% and improve the network throughput.
【作者单位】：西北工业大学电子信息学院;西安交通大学工程坊;
【基金】：国家自然科学基金资助项目(61202394,61571370,61203233,61601365) 陕西省自然科学基金资助项目(2016JQ6017) 中央高校基础科研基金资助项目(3102014KYJD033,3102015ZY093)
【分类号】：TN929.5
【正文快照】： 近年来,随着4G/5G网络中图像、视频等多媒体业务的相继开展,人们对多媒体视频传输质量的要求越来越高。由于无线组播技术能以高效、可扩展的方式发送单点到多点、多点到多点的数据流,因此越来越受到人们的重视,而且在无线组播网络中如何保证收发端之间建立可靠的连接也已成为

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