In 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.