Project Mission

"Create a network service which enables building multicast applications that distribute information over IP networks."

Description

The Java Reliable Multicast Service[tm] is a set of libraries and services for building multicast applications. It enables building applications that multicast data from senders to receivers. The JRM Service supports multiple reliable multicast transports through a federated interface, which provides isolation to applications, and a service provider interface underneath to allow third parties to plug in other reliable multicast transport implementations.

The JRM Service can be used by information distribution applications as the transport for delivery of content to very large constituencies. As compared to unicast protocols (i.e., HTTP), reliable multicast enables broadcasting to groups of receivers, ensuring bandwidth conservation and timely delivery. TRAM, a reliable multicast transport protocol developed along with the JRM Service, is designed for high scalability, targeted at very large numbers of receivers. The JRM Service also includes new services for multicast address allocation and management of channels, as well as a dynamic filtering mechanism that uses Java software classes which are pushed into the network for the purpose of interpreting the data downstream from the server.

You can download a copy of the JRMS libraries and source code here.

Stress Test Environment from RIT.

Tutorial

JRMS tutorial from RIT.

Discussion

Join the JRMS Mailing List. Send a blank email to jrms-interest-subscribe@sun.com.
(Mailing list terms of use).

Technical Reports

TRAM: A Tree-based Reliable Multicast Protocol
The Java(tm) Reliable Multicast(tm) Service: A Reliable Multicast Library
Experiences in Programming a Traffic Shaper
Some Observations on Fairness of Bandwidth Sharing
Pruning Algorithms for Multicast Flow Control
A Reliability Window for Flexible and Scalable Multicast Services

TRAM: Tree-based Reliable Multicast
Other IETF work in progress can be found at the home page for the Reliable Multicast Transport working group

We would like to express our deep appreciation to Hans-Peter Bischof and his students at RIT for all of their contributions to JRMS.

We would like to express our deepest sorrow for the loss of Philip Rosenzweig, who was among the victims killed in the crash of American Airlines Flight 11 at the World Trade Center in New York City on Tuesday, September 11, 2001.