A dynamic multicasting policy based on proxy caching

In this paper, we propose a dynamic multicasting policy based on the phased proxy caching to reduce the network bandwidth from the central server to the clients. In the proposed multicasting policy, for an object, a multicasting channel is allocated only if there are more than two active unicast streams for that object. So, the length of a multicasting window varies with the arrival rate of that object and moreover, proxy caching is applied to the multicasting policy by caching objects step by step starting from the initial portion of the objects; for each object, caching is done either partially or fully depending on the streams´ arrival rate.