认知无线电网络中基于动态吞吐量的路由算法  

Dynamic throughput based routing algorithm in cognitive radio networks

作　　者：沈毅斌[1] 陈元亨[2] 毕春艳[1] SHEN Yibin;CHEN Yuanheng;BI Chunyan(Sichuan University Jinjiang College,Meishan 620860,China;College of Electronics and Information Engineering,Sichuan University,Chengdu 610065,China)

机构地区：[1]四川大学锦江学院,四川眉山620860 [2]四川大学电子信息学院,四川成都610065

出　　处：《现代电子技术》2018年第19期79-82,88,共5页Modern Electronics Technique

基　　金：国家自然科学基金资助项目(91318301);四川省教育厅科研项目(17ZB0255)~~

摘　　要：针对认知无线电网络中传统路由协议的不足,提出基于动态吞吐量的认知无线电网络路由算法(LSAR)。LSAR协议利用动态传输吞吐量(DTT)作为选择转发节点判决指标。只有节点满足比当前节点更靠近于目的节点,比当前节点具有更低的传输时延两个条件才可以作为候选转发节点。LSAR协议再从候选转发节点中选择具有最大DTT的节点作为转发节点。仿真结果表明,提出的LSAR协议能减少信道切换次数及传输时延,并提高路径建立的成功率。The conventional routing protocol in cognitive radio networks has some shortage.Therefore,the location aided spectrum aware routing(LSAR)protocol in cognitive radio network is proposed in this paper.The LSAR protocol uses dynamic transport throughput(DTT)as the judgment index to select the forwarding node.The nodes satisfying the following two conditions can be selected as the candidate forwarding node,one condition is that the node is closer to the destination node than the current node,the other condition is that the node has lower transmission delay than the current node.LSAR protocol selects the node with maximum DTT from the candidate forwarding nodes as the forwarding node.The simulation results show that the LSAR protocol can reduce the channel switching times and transmission delay,and improve the success rate of path establishment.

关 键 词：认知无线电 路由协议 动态频率接入 吞吐量 传输时延 转发节点 

分 类 号：TN711-34[电子电信—电路与系统] TP393[自动化与计算机技术—计算机应用技术]