复杂环境下网络编码的设计与实现

发布时间：2018-06-25 13:11

本文选题：网络编码 + 数字喷泉码　；参考：《陕西师范大学》2014年硕士论文

【摘要】：随着互联网技术的发展,网络已经成为人们日常生活的一部分。传统网络传输方法在传输吞吐量方面存在较大缺陷,与传统路由方法不同,在多播通信网络中,通过网络编码可以使得消息传输速率达到网络的最大流。网络编码的诞生和发展为网络信息传输指明了一个新的研究方向。结合目前的理论成果和实践经验,将网络编码技术应用到现有的通信技术以获得更好的性能,正日益成为近年来的研究热点之一。然而,在实际应用的过程中,面对传输消息和网络环境的复杂,网络编码存在效率偏低和解码率难以控制等问题。针对网络编码的应用问题,论文深入分析了现有的网络编码方案,重点研究现有网络编码方案在应对复杂环境时的不足。针对非等长消息下的网络编码,结合物理层网络编码,提出了基于MPSK的编码方案。相对于传统方案,此方案发送消息的能量消耗为原方案的一半,并且使得信道容量更接近香农熵极限。针对无线多跳网络,论文设计了无线网络下解码率可控的多跳匿名网络编码方案。该方案结合LT码的思想,提出了一种匿名可靠的编码方案,并且方案在中继节点不解码的情况下,完成再编码过程。实现了通信过程的匿名,保证了信宿端解码概率的可控,并且提高了网络的编解码效率。论文提出的两种新型网络编码方案,使网络编码在技术层面的应用有了进一步完善。
[Abstract]:With the development of Internet technology, Internet has become a part of people's daily life. Compared with the traditional routing method, the traditional network transmission method has a big defect in the transmission throughput. In multicast communication network, the message transmission rate can reach the maximum flow through network coding. The birth and development of network coding has pointed out a new research direction for network information transmission. Combined with the current theoretical achievements and practical experience, the application of network coding technology to the existing communication technology to achieve better performance is becoming one of the research hotspots in recent years. However, in the process of practical application, faced with the complexity of message transmission and network environment, network coding has some problems such as low efficiency and difficult to control. Aiming at the application of network coding, this paper deeply analyzes the existing network coding schemes, focusing on the shortcomings of existing network coding schemes in dealing with complex environments. Based on the physical layer network coding, a MPSK based coding scheme is proposed for the network coding with unequal length messages. Compared with the traditional scheme, the energy consumption of the scheme is half that of the original scheme, and the channel capacity is closer to the Shannon entropy limit. For wireless multi-hop networks, a multi-hop anonymous network coding scheme with controllable decoding rate is designed in this paper. Combined with the idea of LT code, this scheme proposes an anonymous and reliable coding scheme, and the scheme completes the recoding process without decoding the relay node. The anonymity of communication process is realized, the probability of decoding is controlled, and the efficiency of network coding and decoding is improved. In this paper, two new network coding schemes are proposed, which make the application of network coding in the technical level more perfect.
【学位授予单位】：陕西师范大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TP393.02

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