New Algorithms to Minimize Handoff
Latency in AMTree Protocol
Ali Al-Sharafi, Mohamad Othman, and Shamala Subramaniam
Faculty of Computer Science and Information Technology, Universiti Putra Malaysia, Malaysia
Faculty of Computer Science and Information Technology, Universiti Putra Malaysia, Malaysia
Abstract:
In active networks, programs can be injected to network elements (routers/switches). This allows programmers to enhance existing protocols or deploy new protocols. AMTree protocol is an active network based protocol that makes sending packets to receivers, after source migration, an efficient process. In AMTree protocol, after source migration, handoff latency computed from the time of reconnecting to a new base station until finding nearest core to the mobile source. In this paper we present two new algorithms to minimize the handoff latency in AMTree protocol. We show that handoff latency is much lower than that of AMTree handoff algorithm if the mobile source connects to a base station which is subscribed to the multicast group. Also we show that our algorithm gets better results than AMTree if the new base station is not in the multicast group.Keywords: Active networks, mobile networks, multicast, handoff.
Received May 26, 2007; accepted October 30, 2007