A proxy-based dynamic multicasting policy using stream's access pattern

Abstract

This paper proposes a multicasting channel allocation policy in the proxy server that a multicasting channel is not allocated for all objects but for some objects whose access pattern statisfies some conditions. For an object, one unicasting channel is allocated from the origin server to the proxy server and subsequently the proxy server either unicasts or multicasts that object from the proxy server to the client(s) based on the number of avtive streams. The proxy server also caches each object partially or fully based on each object's access frequency : the cached portion of each object increases as its access frequency increases whereas the cached portion of each object decreases as its acces frequency decreases. © Springer-Verlag 2003.