SPAM: a data forwarding model for multipoint-to-multipoint connection support in ATM networks

Abstract

Many distributed multimedia applications involve data delivery from a source to multiple destinations, the participating nodes forming a multicast group. In the naive solution, separate connections can be established from each source to other group members. However a tree can be established for each source with the participants as the leaf nodes or just have one tree spanning all the participants. In this paper, we introduce the data forwarding model to support such shared multicast trees over the ATM networks called SPAM (a Simple Protocol for ATM Multicast). Our work will allow the recently proposed wide area multicast protocols (like CBT and PIM) to be supported in ATM networks. Further, SPAM improves on error detection and allows for leaf initiated join of UN1 4.0.

ATM multipeer communication using a two-layer architecture

“…Recently, some protocols have been proposed for some aspects of ATM multipeer communication, like SEAM [12], SMART [13], SPAM [14] and CRAM [15].…”

“…Some systems proposed require changes to at least some of the network nodes, e.g. SEAM [12], SMART [13], SPAM [14] and CRAM [15]. • Two-layer or integrated approach for IP solutions over ATM • Various security aspects, e.g.…”

“…The overhead/data ratio is worse, however. SPAM [14], a data forwarding model for multipeer connection support in ATM networks, uses a per-cell identifier, which in turn requires a new ATM adaptation layer, possibly making this approach a little inefficient because AAL functionality has to be provided in software.…”