无线ad-hoc网络中基于层叠网络的可靠多播协议  

Overlay reliable multicast protocol in wireless ad-hoc network

作　　者：石曦[1] 冯钢[1] 张翼德[1] 

机构地区：[1]电子科技大学通信抗干扰技术国家级重点实验室,四川成都611731

出　　处：《通信学报》2010年第S1期26-31,共6页Journal on Communications

基　　金：国家自然科学基金重点资助项目(60833002);国家自然科学基金资助项目(60772142);国家重点基础研究计划("973"计划)基金资助项目(2007CB310604);国家科技重大专项基金资助项目(2008ZX03003-005);国家科技支撑计划基金资助项目(2008BAH30B00)~~

摘　　要：为满足实际应用中数据传输的可靠性,在无线ad-hoc网络中进行可靠多播传输是必不可少的。提出了一种新的层叠网络可靠多播协议LORM(lightweight overlay reliable multicast),利用周期检测节点信息的方式建立层叠网络拓扑,通过本地恢复与源节点恢复结合的方式处理各种分组丢失情况,尽可能保证多播数据的可靠性。在基于802.11b的ad-hoc网络中进行实验的结果显示,网络处于高度拥塞的情况下,LORM协议在分组丢失率方面的性能大大超过缺少可靠性保证措施的LightWeight协议。Reliable multicast service becomes essential to support a class of emerging applications which require reliable data delivery to multiple nodes simultaneously in wireless ad-hoc networks.A new overlay reliable multicast protocol called lightweight overlay reliable multicast(LORM) was proposed.LORM built up overlay network topology with pe-riodic detection of node information.The reliability of multicast data was guaranteed by combining local recovery and source recovery mechanisms.The results of the experiment based on 802.11b ad-hoc network show that LORM signifi-cantly outperforms LightWeight in terms of packet loss rate.

关 键 词：无线通信技术 LORM 可靠多播协议 层叠网络 

分 类 号：TN929.5[电子电信—通信与信息系统]