A Multicast Routing Protocol with Dynamic Tree Adjustment for Mobile IPv6

Abstract

TCP/IP is currently the standard network protocol for wired Internet. To make all the Internet services available to all mobile users, Mobile IP is proposed. Another important development for TCP/IP is the evolvement to the next generation Internet. The next generation protocol is called IPv6. Whether in IPv4 or IPv6, situations arise in some Internet applications that a piece of data needs to be sent to multicast recipients. This is called multicasting. In this paper, we study the multicasting routing problem based on Mobile IPv6. In multicasting, the mobility of sender may lead to serious problems. When a sender moved, the full delivery tree would fail so that multicast datagrams can’t forward to all receivers. In this paper, we propose a Reverse Traffic Interface (RTI) mechanism to preserve the integrity of multicast tree. In this mechanism, we will use a Backward-Forced Path (BFP) to regenerate a new tree without rerouting. It can ensure multicast datagrams be sent to all reachable destinations without interruption. In addition, we show that a slight modification of the DVMRP version 3, called DVMRPv6, can be used in Mobile IPv6 to support our mechanism. Finally, we use a total tree cost measures to estimate and evaluate our scheme. We also implement simulations to demonstrate its effectiveness. The results show that our proposal genuinely makes multicasting on mobiles network simpler, more efficient, and more reliable