无线Ad Hoc网络中新型N-CSMA协议采用多优先级时的性能分析  

Performance analysis of new N-CSMA protocol in wireless Ad Hoc networks with multi-priority

作　　者：韩泽军 丁洪伟[1] 保利勇[1] 杨志军[1] 柳虔林[2] HAN Ze-jun;DING Hong-wei;BAO Li-yong;YANG Zhi-jun;LIU Qian-lin(School of Information Science and Engineering,Yunnan University,Kunming 650500,China;Yunnan Military Command Communication Repair Institute,Kunming 650051,China)

机构地区：[1]云南大学信息学院,云南昆明650500 [2]云南省军区通信修理所,云南昆明650051

出　　处：《云南大学学报（自然科学版）》2020年第1期43-49,共7页Journal of Yunnan University(Natural Sciences Edition)

基　　金：国家自然科学基金(61461053,61461054)

摘　　要：Ad Hoc网络是由大量分布式运行的节点组成,但节点生存周期较短.针对这一不良特性,提出一种基于碰撞长度可变的三时钟多优先级N-CSMA协议,以此来提高节点的传输效率.通过引入多优先级机制和降低信息分组发生碰撞所占的时隙长度来满足不同优先级业务的QoS需求并提高系统的吞吐率,有效的缓解信道拥堵现象,改善了无线Ad Hoc网络的系统性能.最后,通过仿真实验来验证本协议的准确性并与其他协议进行对比,来证明本协议的优越性.Ad hoc network is composed of lots of distributed nodes,but the lifetime of nodes is short.In this paper,a three-clock multi-priority N-CSMA protocol based on variable collision length is proposed to improve the transmission efficiency of nodes.It is introduced multi-priority mechanism and reduced the time slot length of information packet collision to meet the QoS requirements of different priority services.So it is improved the throughput of the system,effectively alleviate channel congestion and the system performance of wireless ad hoc network.Finally,the accuracy of this protocol is verified by simulation experiments and compared with other protocols to prove the superiority of this protocol.

关 键 词：无线Ad Hoc网络 碰撞长度可变 N-CSMA 多优先级 QOS 

分 类 号：TP393[自动化与计算机技术—计算机应用技术]