ABSTRACT
Abstract The problem of ensuring reliability in a one-to-many multicast scheme has been approached from various angles and a number of protocols have been created to address this issue. We consider a nack-based and treebased reliable multicast scheme which utilizes special agents (called Designated Receivers) for accumulation of nacks and caching of data to handle retransmissions. We evaluate the average bandwidth utilized per link in a uniform tree in order to transmit a single packet to all the hosts. We also calculate the average delay per packet for a host and verify the analytical results using simulations.
