Abstract

Providing a multicast service to mobile hosts is difficult due to frequent changes of mobile host location and group membership. To overcome the difficulty, several multicast protocols for mobile hosts have been proposed. But they include glitches such as a non-optimal delivery route, duplicated datagrams, and overheads caused by the frequent reconstruction of a multicast tree. We summarize these problems and propose an efficient multicast protocol. The proposed protocol reduces the data delivery path length and decreases not only the amount of duplicated data but also multicast traffic load. The performance of the proposed protocol was evaluated by simulation and we got an improved performance.

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