北京邮电大学学报

  • EI核心期刊

北京邮电大学学报 ›› 2009, Vol. 32 ›› Issue (5): 75-79.doi: 10.13190/jbupt.200905.75.370

• 论文 • 上一篇    下一篇

适合多源组播的改进型ODMRP

印敏1,唐尧2   

  1. (1.解放军理工大学 气象学院, 南京 211101;
    2.解放军理工大学 指挥自动化学院, 南京 210007)
  • 收稿日期:2009-02-26 修回日期:2009-08-17 出版日期:2009-10-28 发布日期:2009-10-28
  • 通讯作者: 印敏

An Improved ODMRP Used for Multi-Source Group Communication

YIN Min1,TANG Yao2   

  1. (1.Institute of Meteorology, People's Liberation Army University of Science and
    Technology, Nanjing 211101, China;
    2.Institute of Command Automation, People's Liberation Army University of Science and Technology, Nanjing 210007, China)
  • Received:2009-02-26 Revised:2009-08-17 Online:2009-10-28 Published:2009-10-28
  • Contact: YIN Min

摘要:

为解决按需组播路由协议(ODMRP)在多源组播应用时开销较大的问题,提出一种仅由转
发节点和后备节点参与的改进型路由维护机制. 该机制借鉴后备路径的概念,利用无线信道
的广播特性和ODMRP周期维护的特点,限制了路由维护时的分组泛洪范围. 仿真结果表明,
该机制尤其适合于群组中组播源个数较多以及接收成员个数与网络规模之比较小的情况,能
有效减少控制分组发送次数,显著提高多源组播发送的分组递交率(PDR).

关键词: 多源组播, 组播路由协议, 限制泛洪, 转发节点, 后备节点, 自组织网络

Abstract:

In order to reduce great overhead of ondemand multicast routing protocol (ODMRP) in multisource applications, an improved flooding limitation mechanism ispresented, which permits forwarding nodes and backup nodes to transmit maintenance packets only. It makes good use of broadcast characteristic of wireless channel and periodical routing maintenance of ODMRP. Simulation shows that this improved ODMRP is especially fit for multisource group communication and less receiver occasion compared to the network scale. Under the above conditions, the protocol reduces maintenance overhead effectively and enhances packet delivery ratio(PDR) distinctly.

Key words: multi-source group communication; multicast routing protocol; flooding limitation, forwarding node, backup node; Ad Hoc network