记忆信道中多跳ARQ协议性能的建模分析

发布时间：2018-09-01 05:41

【摘要】：无线传感器网络在飞速发展和广泛使用的同时,也面临着抗衰落性差和如何可靠传输的问题。多跳中继技术可以有效地减少由于信道衰落所造成的无线通信的负面问题,因而在无线网络中被广泛应用。本文以瑞丽衰落信道为背景,通过建立离散时间的Markov链模型、能量效率模型,使用Matlab等工具,研究多跳ARQ系统的稳态分布、吞吐量性能、能效性能。本文的主要研究成果如下:首先通过建立多跳ARQ系统的三状态Markov链模型,分析和比较了多跳ARQ系统中全部中继节点丢包、部分中继节点丢包、中继节点不丢包三种状况下通信系统的吞吐量性能,得到结论:中继节点不丢包时,ARQ系统吞吐量性能最优;而全部中继节点丢包时,ARQ系统吞吐量性能最差。数值模拟显示理论分析和实际仿真得到的系统的吞吐量性能基本一致。其次通过建立多跳ARQ系统的能效模型,计算和比较了中继节点丢包与不丢包两种状况下通信系统的能效性能。得到结论:中继节点不丢包时,ARQ系统能效性能更优。通过数值模拟进一步验证了我们的结论的正确性。最后通过介绍多中继协同ARQ系统的吞吐量的分析过程,将其分析方法提炼和总结为“中继聚合”,并将使用该方法求解吞吐量的过程归纳为了三步。通过对多跳中继的再次阐述,本文将“中继聚合法”推广到了多跳ARQ系统的吞吐量的求解问题上,从不同的角度对多跳ARQ系统的吞吐量进行了分析,而且得到了较理想的结果。证实了多中继ARQ系统的吞吐量性能的分析过程和多跳ARQ系统的吞吐量性能的分析过程存在着共同的方法,有利于在分析这两种协同ARQ协议的某些性能时的统筹规划。
[Abstract]:With the rapid development and wide use of wireless sensor networks, wireless sensor networks also face the problems of poor anti-fading and reliable transmission. Multi-hop relay technology is widely used in wireless networks because it can effectively reduce the negative problems of wireless communication caused by channel fading. In this paper, based on Rayleigh fading channel, discrete time Markov chain model, energy efficiency model and Matlab are used to study the steady-state distribution, throughput performance and energy efficiency performance of multi-hop ARQ systems. The main research results of this paper are as follows: firstly, by establishing the three-state Markov chain model of multi-hop ARQ system, we analyze and compare the packet loss of all relay nodes and partial relay nodes in multi-hop ARQ system. It is concluded that the throughput performance of the ARQ system is the best when the relay node does not lose the packet, and the throughput performance of the ARQ system is the worst when all the relay nodes lose the packet. Numerical simulation shows that the throughput performance of the system obtained by theoretical analysis is basically consistent with that obtained by practical simulation. Secondly, the energy efficiency model of multi-hop ARQ system is established to calculate and compare the energy efficiency performance between relay node packet loss and non-packet loss. It is concluded that the energy efficiency performance of ARQ system is better when the relay node does not lose packets. The correctness of our conclusion is further verified by numerical simulation. Finally, by introducing the throughput analysis process of multi-relay cooperative ARQ system, the analysis method is abstracted and summarized as "relay aggregation", and the process of using this method to solve throughput is summed up as three steps. In this paper, the method of relay aggregation is extended to solve the throughput of multi-hop ARQ system. The throughput of multi-hop ARQ system is analyzed from different angles, and the ideal results are obtained. It is proved that there are common methods for analyzing the throughput performance of multi-relay ARQ systems and multi-hop ARQ systems, which is beneficial to the overall planning of some performances of these two cooperative ARQ protocols.
【学位授予单位】：兰州理工大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TP212.9;TN929.5

【参考文献】