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The inherent selfishness of each node for the enhancement of message successful delivery ratio and the network overall performance improvement are reflected in the contradiction relationship of competition and cooperation in delay/disruption tolerant networks (DTN). In particular, the existence of malicious node aggravates this contradiction. To resolve this contradiction, social relationship theory and group theory of social psychology were adopted to do an in-depth analysis. The concrete balancing approach which leveraged Nash equilibrium theory of game theory was proposed to resolve this contradiction in reality. Thus, a new congestion control routing algorithm for security defense based on social psychology and game theory (CRSG) was put forward. Through the experiment, this algorithm proves that it can enhance the message successful delivery ratio by more than 15% and reduce the congestion ratio over 15% as well. This algorithm balances the contradiction relationship between the two key performance targets and made all nodes exhibit strong cooperation relationship in DTN. 相似文献
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互联网无中断转发的生存性路由协议 总被引:1,自引:0,他引:1
互联网逐渐成为通信基础设施并承载了更多的关键业务流量,即使瞬时中断也会对某些应用造成巨大损失.然而,传统路由协议在出现链路/节点故障等拓扑变化时存在收敛时间长、瞬时不可达以及环路的问题.实际测量发现,路由瞬时失效相当普遍.因此,研究人员提出多种能够保证流量无中断转发和快速恢复的路由协议.在分析瞬时失效现象以后,提出了生存性路由协议的分类方法,重点对一些重要的路由协议的核心路由机制进行深入分析,并比较其特点、性能、开销等.最后,结合该领域研究现状以及存在的问题,指出未来生存性路由的研究重点. 相似文献
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安全路由协议设计是移动自组网所面临的重大课题之一.针对移动自组网中3种典型的安全路由协议(ARAN,Ariadne,SEAD)进行了深入研究,对其性能与特点进行了细致的比较与分析.同时,在网络模拟器ns2中实现了上述协议并进行了性能测试.实验结果显示:尽管上述安全路由协议能在一定程度上提高安全性,但其性能及额外开销随网络拓扑的动态变化也急剧变化.模拟分析结果对移动自组网中安全路由协议的设计与分析有着较好的指导意义,为相关设计打下了良好的基础. 相似文献
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