【摘要】 提出了一种DTN多源多宿网络的数据编码分发机制(Data Dissemination Mechanism with Network Coding Based on Ant Colony Algorithm,DDM-NC).在发布/订阅机制的基础上,通过对主题数据的编码运算和传输,充分利用网络容量进行数据多播,使得数据传输具有更好的安全性和传输效率;同时,针对编码包洪泛传输过程中信息冗余大,无效投递较多等问题,设计了基于蚁群算法的编码包路由策略,引导编码包向信宿聚集,降低编码投递过程中的数据冗余,减少投递延迟.仿真实验表明,相比传统的DTN传染病路由策略和随机网络编码传输方法,DDM-NC方法有更好的数据投递性能.更多还原

【Abstract】 It proposed a data dissemination mechanism with network coding based on ant colony algorithm( DDMNC),used in multi-source multi-sink delay tolerant network( DTN). Based on the publish /subscribe mechanism,the topic data were computed and transferred using network coding method,which can take full advantage of the network capacity to multicast,to improve security and efficiency of the transfer process. At the same time,for working out the problem of large data redundancy and vast invalid deliveries in the packages broadcast process,a package routing scheme based on ant colony algorithm was brought up,to guide the packages deliver to destinations,and cut down the data redundancy and deliver latency. The simulation results show that,compared with the traditional DTN epidemic routing and random network coding method,the DDM-NC method can get better data delivery performance.更多还原