Reliable Mobile IP Multicast Based on Hierarchical Local Registration

Abstract

In a mobile wireless networks, mobile link transmission is unreliable, the packets are easily lost, and the mobility of nodes may cause asynchronous problem. In order to resolve the problems of multicast reliability in wireless networks, a framework architecture of the mobile IP multicast is proposed, which is a reliable multicast architecture based on hierarchical local registration. Hierarchical management is taken use to shield the movements of mobile nodes in the domain. As a surprising result of that, the stability of multicast forwarding trees is improved. Besides, the switching delay and the resulting packets loss are reduced. A multicast information exchange center is set in the root node. The arrived multicast data is cached in the center until it is received by all mobile nodes in the domain. When any exchanges occur in nodes, the retransmission message is sent to the exchange center to retransmit the lost packets. In that case, the synchronization problem can be solved, and reliable multicast services for mobile nodes are provided.

Keywords

• Mobile IP
• Multicast
• Hierarchical architecture
• Hierarchical local registration
• Wireless network.