Zhou Yuan1, Li Guangsheng2, Zhan Yongzhao2, Hou Yibin1
(1. School of Electronics and Information Engineering, Xi'an Jiaotong University, Xi'an 710049, China; 2. School of Computer Science and Communication Engineering, Jiangsu University, Zhenjiang 212013, China)
Abstract: Aiming at problems of low efficiency and
high overhead of control packets in the existing multicast routing protocols for ad hoc
networks, a novel multicast routing protocol for ad hoc networks called dynamic ring based
multicast routing protocol (DRMR) was designed and realized. The implemented framework of
DRMR was established and the function modules were defined. In DRMR, the multicast routing
is carried out through establishing and maintaining the connected ring graph which is
constructed from dynamic broadcast rings held by each member group. When the group member
broadcast departs from the connected ring graph, the connectivity can be recovered by
gradually extend the radius of broadcast ring. Simulation results show that DRMR has a
high data packet delivery ratio and low routing maintenance cost, and its total control
overhead is reduced more than 18% compared with the multicast routing protocols based on
requirements. It can meet the requirements of the multicast applications in ad hoc
networks.
Keywords: ad hoc network; multicast; routing protocol