IP multicast suffers from scalability problems as the number of concurrently active multicast groups increases, since it requires a router to keep forwarding state for every multicast tree passing through it. In QoS multicast provisioning, the problem becomes even worse, since not only the forwarding state but also the resource requirement of a multicast group needs to be kept at the router. Pr...

This article presents an overview of a secure multicast framework as well as a secure multicast system demonstrator used for end-to-end performance assessment of secure multicast service delivery over satellite. The security framework relies on IP security with multicast extensions and Group Domain of Interpretation (GDOI) multicast key management. The framework addresses challenges in the deli...

With the development of the IPv6 networks, more and more applications put forward to use multicast. Multicast security and management is one of the key issues for IP multicast services deployment in IPv6 network as in IPv4 network. We introduce the idea of Service-Oriented Architecture (SOA) in software scope to multicast service, and design a Service-oriented Controllable Multicast Model (SOCM...

Many applications are inherently multicast in nature. Such applications can benefit tremendously from reliable multicast support at the MAC layer since addressing reliability at the MAC level is much less expensive than handling errors at the upper layers. However, the IEEE 802.11 MAC layer does not support reliable multicast. This void in the MAC layer is a limiting factor in the efficacy of m...

Without a doubt multicast communication the one to many or many to many delivery of data has become a hot topic It is of interest in the research community among standards groups and to network service providers For all the attention multicast has received there are still issues that have not been completely resolved One result is that protocols are still evolving and some standards are not yet...

In this paper, we investigate two issues. First, what level of efficiency gain does multicast offer over unicast? Second, how does the shape of multicast trees impact multicast efficiency? We address the first issue by developing a metric to measure multicast efficiency for a number of real and synthetic datasets. We find that group sizes as small as 20 to 40 receivers offer a 60-70% reduction ...

Core Based Trees (CBT) Multicast Routing Architecture Status of this Memo This memo defines an Experimental Protocol for the Internet community. This memo does not specify an Internet standard of any kind. Discussion and suggestions for improvement are requested. Distribution of this memo is unlimited. Abstract CBT is a multicast routing architecture that builds a single delivery tree per group...

Multicast data distribution is achieved through three mechanisms: rendezvous of senders with receivers, distribution tree building protocols, and multicast data forwarding. While the first two mechanisms have been extensively studied, scaling multicast forwarding state has not been addressed. The lack of efficient strategies for multicast forwarding state aggregation could seriously inhibit the...