New spray and wait protocol with node activity in heterogeneous delay tolerant networks  

作　　者：Wu Jiagao Ye Ke Zhu Yiji Liu Linfeng 

机构地区：[1]College of Computer, Nanjing University of Posts and Telecommunications [2]Jiangsu High Technology Research Key Laboratory for Wireless Sensor Networks

出　　处：《The Journal of China Universities of Posts and Telecommunications》2015年第2期60-68,共9页中国邮电高校学报（英文版）

基　　金：supported by the National Natural Science Foundation of China (61373139, 60903181);the Natural Science Foundation of Jiangsu Province (BK2012833);the Natural Science Foundation of Jiangsu Higher Education (12KJB520011);the Scientific Research Foundation of Nanjing University of Posts and Telecommunications (NY213161)

摘　　要：The spray and wait protocol is a classic copy-limited spraying protocol in delay tolerant networks, in which, the binary spray mode can be improved for heterogeneous delay tolerant networks. In this article, a new conception of node activity was defined to weigh the importance of nodes in aspect of message dissemination in the whole network. A new spray and wait protocol with node activity was proposed to improve the performance in heterogeneous delay tolerant networks. A mathematical model used under varieties of the spraying protocols was also proposed to analyze the expected delay of the protocol. Simulations show that the spray token proportion with node activity is optimal and the new protocol is of better performance than other related protocols. Therefore, this protocol has high efficiency and good scalability.The spray and wait protocol is a classic copy-limited spraying protocol in delay tolerant networks, in which, the binary spray mode can be improved for heterogeneous delay tolerant networks. In this article, a new conception of node activity was defined to weigh the importance of nodes in aspect of message dissemination in the whole network. A new spray and wait protocol with node activity was proposed to improve the performance in heterogeneous delay tolerant networks. A mathematical model used under varieties of the spraying protocols was also proposed to analyze the expected delay of the protocol. Simulations show that the spray token proportion with node activity is optimal and the new protocol is of better performance than other related protocols. Therefore, this protocol has high efficiency and good scalability.

关 键 词：delay tolerant network （DTN） routing protocol spray and wait node activity mathematical model 

分 类 号：TN915.04[电子电信—通信与信息系统]