基于网络编码的无线网络安全性与可靠性研究

项目名称： 基于网络编码的无线网络安全性与可靠性研究

项目编号： No.60873265

项目类型： 面上项目

立项/批准年度： 2009

项目学科： 金属学与金属工艺

项目作者： 王伟平

作者单位： 中南大学

项目金额： 30万元

中文摘要： 在本基金的资助下，我们围绕网络编码在无线网络安全、可靠高效传输方面的应用展开研究，取得了良好的研究成果。在安全性方面，我们将网络编码应用于无线安全传输机制和恶意篡改检测机制，针对无密钥机制的分布式网络环境，提出了基于多路径网络编码的信息分割传输策略和基于源点编码及多路径传输的恶意节点检测机制,可以实现不依赖密钥的信息传输保密性，同时在不需要额外定位和身份认证的条件下，完成恶意节点的检测和定位。在无线传输可靠性和高效性方面，面向无线重传，提出了无线丢包环境下基于网络编码的高效重传算法，优化了重传机制，有效地减少了重传次数；面向组播，提出了网络编码运算代价的定量计算方法、不同组播率下线性网络编码的导出与扩展方法和基于试播的确定性网络编码数据传输策略，实现了未知网络拓扑下的高效组播；面向单播，将随机线性编码和局部异或编码结合在路由机制中，提出了基于累积反馈确认的网络编码机会路由和基于局部拓扑的网络编码感知路由机制，有效减少了无线传输代价，提高了吞吐量。本课题的研究为网络编码在无线网络安全、可靠、高效传输中的研究与应用提供了新的研究思路，奠定了良好的研究基础。

中文关键词： 无线网安全性与可靠性；网络编码；编码优化算法;无线网络协议

英文摘要： Supported by this grant，our research has made significant progress in the study of network coding applied in wireless network to achieve secure, reliable and efficient transmission .For secure transmission, we focus on the research of applying network coding in secure transmission and malicious node detection. We propose a new transmitting mechanism based on information slicing and multi-paths network coding, which implement secure transmission in distributed wireless network with lack of secret keys, and we also present a new method for message pollution detection based on source coding and multi-path routing, which can locate and isolate the malicious node with no need of special hardware or authentication. For reliable and efficient transmission in wireless network, addressing the problem of efficient retransmission in wireless broadcasting, a novel retransmission approach based on network coding has been presented, which effectively reduced average amount of retransmitting and improved the throughput of broadcasting. For improving the efficiency of multicast, we propose a quantification calculation method for the cost of network coding, a generation and extension method between two coding schemes with different multicast rates for the same network scene and a novel network coding multicast strategy based on testing multicast, which largely improved multicast efficiency even under the scene with unclear network topology. Meanwhile, we propose an opportunistic routing mechanism based on linear network coding with cumulative coding coefficient acknowledgements and a coding-aware routing mechanism based on local topology detection, which significantly reduced the transmission cost and enhance the throughput in wireless networks. The results of our research provide new ideas and solid foundation of application of network coding in wireless networks to achieve high security, reliability and efficiency.

英文关键词： security and robust in wireless network;network coding; optimized network coding algorithm;wireless network protocol