Abstract:

To address solving

the high dynamics problem of mobile Application Layer Multicast (ALM) nodes, a multicast

system’s failure recovery strategy in the mobile environment is proposed. This strategy can

achieve the goal of quick redirection by using active failure recovery method and the

proposed redirection algorithm based on parent node backup. Besides, we propose to use the

similarity of multicast tree to measure the impact of the redirection algorithm on the

change of multicast system’s topology, thus evaluating the quick redirection strategy.

Simulation experiment is given to show that the proposed quick redirection strategy has low

delay and small influence on the multicast system's topology..

Key words: mobile ALM;fault recovery;rejoin delay;multicast tree similarity