摘要
未来的认知Ad-Hoc网络中,授权用户的活动将对认知用户之间的多跳路由的稳定性造成很大影响,为了保证认知用户之间路由的稳定性并降低路由的端到端时延,提出了一种基于稳定性和时延的路由协议。该协议引入稳定性因子,只有满足了稳定性约束条件的路由才可以作为候选路由,然后将传输时延作为度量对候选路由进行筛选。通过一个简单拓扑模型验证了该路由选择策略的优越性;并针对认知无线Ad-Hoc网络的网络环境,分析了其时延和稳定性的模型,在此基础上结合传统AODV(Ad hoc on-demand distance vector routing)路由协议,实现了提出的综合信道和路径选择策略。仿真结果表明:提出的路由协议无论在不同的源、目的节点距离,还是在不同的授权用户活跃程度下都具有更好的稳定性和端到端时延表现。
In the future cognitive Ad-Hoc networks, the activities of the primaiy users w ill cause great influence on the stability of multiple hops routes between cognitive users. To ensure the route stability and reduce the route latency between cognitive users, a stability and delay based routing protocol is proposed. In the protocol the concept of stability factor is introduced,only the paths under the stability constraint can be the candidate routes. Then the transmission delay is used as a metric to select the best route from those candidate routes. First, the superiority of the proposed routing selection strateg}^ is demonstrated through a sample topolog}^ model. Then, the latency and route stability in cognitive radio Ad-Hoc networks are detailed analyzed. Last, improvements are made on the traditional AODV protocol to realize the proposed channel allocation and routing selection strategy. Simulation results show that the proposed protocol has a better performance on route stability and end to end delay both under different source and destination distances, and different primaiy user activities.
作者
朱江
郭兵
段昂
ZHU Jiang;GUO Bing;DUAN Ang(Chongqing Key Lab of Mobile Communications Technology, Chongqing University of Posts and Telecommunications,Chongqing 400065 , P. R. China)
出处
《重庆邮电大学学报（自然科学版）》
CSCD
北大核心
2016年第4期443-450,共8页
Journal of Chongqing University of Posts and Telecommunications(Natural Science Edition)
基金
国家自然科学基金项目(61102062)
重庆市科委自然科学基金项目(cstc2015jcyj A40050)
重庆市教委科学技术研究项目(KJ120530)~~
