Copy-Token Allocation Control for Adaptive Multicast Routing and Its Performance

Hideki TODE  Hiroki YAMAUCHI  Hiromasa IKEDA  

Publication
IEICE TRANSACTIONS on Communications   Vol.E83-B   No.4   pp.803-811
Publication Date: 2000/04/25
Online ISSN: 
DOI: 
Print ISSN: 0916-8516
Type of Manuscript: PAPER
Category: Network
Keyword: 
multicast,  adaptive routing,  load distribution,  copy node allocation,  

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Summary: 
An efficient scheme for establishing the multicast-path on ATM network is to configure the tree-shaped path via several intermediate copy nodes. This scheme needs the multicast routing control. Thus, restricting the number of copy nodes was proposed since it make this control fast and simple. However, if restricted number of copy nodes is fixed in the network design, multicast traffic will concentrate around copy nodes, and as a result, the possibility of occurring congestion will be higher. In our research, we permit restricted number of nodes as intermediate nodes which branch the tree-shaped path at routing, and name this permission "copy-token. " Namely, the node which has "copy-token" is defined as the copy node. Our research purpose is to distribute the multicast traffic by adaptively allocating "copy-token" to nodes which satisfy the conditions of both the priority for multicasting such as lower offered load and the geographical distribution at the same time. Finally, we evaluate the performance of our proposed routing scheme on the blocking probability through computer simulations.