Performance evaluation of distributed ARQ protocols for reliable multicast communications

摘要

By many researches of reliable multicast protocols, it is proposed that some types of distribution ARQ protocols that allow nodes except source to retransmit lost packets in order to achieve high efficiency by reducing of retransmissions. Performance analysis of distributed AIIQ protocols that have been already published is intended specific multicast tree arid can not apply to many cases. In this paper, as the performance measure, we think the average numbers of packet transmissions of each link for reliable delivery to all receivers, and for ally tree topology, we derive analytical result of two types of distributed protocols, i.e. the router-based retransmission scheme and the receiver-based retransmission scheme. And we examine the performance, especially of the router-based retransmission scheme, using the numerical results of the average, the maximum, and the minimum of the performance measure mentioned above.