The Active Traffic Control Mechanism for Layered Multimedia Multicast in Active Network

I n multicasting multimedia data, effectively adapting to heterogeneous receivers is very difficult. In this paper we propose an active traffic control mechanism for layered multimedia multicast (ATLM) in active network environment. The proposed scheme controls traffic at each router using the traffic condition of immediate children nodes. Also the traffic adjustment is niuch finer than existing multicast protocols of a granularity of one layer. Computer simulation reveals that the proposed scheme significantly improves the amount of delivered traffic and end-to-end delay as much as about 10% compured to layer-wise adjustment. Moreover, it does not require to maintain multiple sessions for transferring multiple layer data but only one session, and thus reduces the overhead on session management and network bandwidth.