Dynamic replier active reliable multicast (DyRAM)

Desirable features of reliable multicast include low end-to-end delays, high throughput and scalability, and meeting these objectives is not an easy task. We propose a receiver-based (replier) local recovery multicast protocol with dynamic repliers elected on a per-packet basis. Designed to provide an efficient reliable multicast service without any cache facilities in the multicast tree, our approach, denoted DyRAM, uses low-overhead active services in routers. After presentation of the protocol and some design and implementation issues, the paper compares DyRAM to ARM, the nearest active reliable multicast protocol in term of functionalities proposed in the active multicast community. Simulation results show that DyRAM performs much better than an ARM-like protocol which needs a significant amount of cache to exhibit performances. Additionally, in the case that some cache is available for DyRAM and ARM, the study shows that DyRAM always performs better than ARM.