认知Ad Hoc网络中的跨层路由协议  

Cross-layer routing protocol for cognitive Ad Hoc networks

作　　者：郑腾飞[1,2] 朱琦[1,2] 

机构地区：[1]南京邮电大学江苏省无线通信重点实验室,南京210003 [2]南京邮电大学教育部宽带无线通信与传感网技术重点实验室,南京210003

出　　处：《计算机应用》2011年第A02期9-13,共5页journal of Computer Applications

基　　金：国家973计划项目(2007CB310607);国家自然科学基金资助项目(60772062);国家863计划项目(2009AA01Z241);国家科技重大专项(2011ZX03001-006-02;2011ZX03005-004-03)

摘　　要：在认知Ad Hoc网络中,如何有效利用有限频谱资源,提高无线网络性能已经成为近几年的研究热点。在AODV路由协议基础上,针对传统多信道认知网络协议中常见的丢包现象、信道频繁切换和路由负载不均等问题,提出了带有缓存机制、信道切换保护机制和基于负载的选路机制——CLC-AODV路由协议。该协议要求节点在网络层实现信道分配,并且在节点拥有两条相同长度的最短路径时需要依据最小负载进行选路,属于跨层研究的范畴。仿真结果表明,这种跨层的路由策略能够满足认知Ad Hoc网络的要求,有效提高系统吞吐量的同时,也有效地减少了网络中的传输时延。In cognitive Ad Hoc networks,how to improve the performance of the wireless network by utilizing the spectrum resources efficiently has become a hot research topic in recent years.Based on AODV routing protocol,a new CLC-AODV routing protocol was presented,including load-based routing mechanism,cache mechanism,channel switching protection for solving the traditional common problems in multi-channel cognitive routing protocol： packet loss,frequent channel switching and routing load imbalance and so on.Channel allocation was realized at network layer,meanwhile,the route should be selected according to the minimum load when a node has two same shortest paths.The respective simulation results demonstrate that it could comply with the requirements of cognitive Ad Hoc networks effectively and improve the system throughput performance,decreasing transmission delay simultaneously.

关 键 词：认知无线电 Ad HOC 路由 AODV 跨层 

分 类 号：TP393.03[自动化与计算机技术—计算机应用技术]