Large Scale Multicast Applications (lsma) ----------------------------------------- Charter Last Modified: 06/05/2000 Current Status: Concluded Working Group Chair(s): Jon Crowcroft Michael Myjak Applications Area Director(s): Ned Freed Patrik Faltstrom Applications Area Advisor: Ned Freed Technical Advisor(s): Allison Mankin Mailing Lists: General Discussion:lsma@gmu.edu To Subscribe: lsma-request@gmu.edu Archive: Description of Working Group: Note: Allyn Romanow is also an Area Technical Advisor. This group focuses on the needs of applications that require real-time or near real-time communications to support a large number of simulation processes (virtual entities). These applications have been analyzed by the U.S. Department of Defense to require IP multicast support for 10K simultaneous groups, for upwards of 100K virtual entities in a global sized WAN by the year 2000. The concrete example application is the Distributed Interactive Simulation work of the DIS Interoperability and Standards workshops and standardized as IEEE 1278 - 1995. The concrete example application is the Distributed Interactive Simulation work of the DIS Interoperability and Standards workshops and standardized as IEEE 1278 - 1995. Future simulation implementations will use the High Level Architecture (HLA) work sponsored by the U.S. Defense Modeling and Simulation Office, and which is currently being standardized by the newly formed Simulation Interoperability Standards Organization (SISO). The WG aims to provide documentation on how the IETF multicast protocols, conference management protocols, transport protocols and multicast routing protocols are expected to support the example application. The result of this WG will be two Informational documents that we hope will be used as input and advice by a number of IETF working groups, among them IDMR, ION, MBONED, MMUSIC, and by working groups being developed on Reliable Multicast Applications and QOS Routing. The document editors for the informational documents will be Steve Seidensticker for "Scenarios" and Mark Pullen for "Limitations". The Scenarios document will describe the environment in which distributed simulation applications operate. It will provide realistic example scenarios of small, medium and large simulation exercises. The Limitations product will document the limitations of current IETF products as they pertain to distributed applications. This document will offer concise examples of how distributed applications demonstrate these limitations and to the extent possible, offer potential solutions to the identified limitations. The documents will attempt to provide specific numbers for the demands placed on protocol or infrastructure, and for the limits that protocols impose on the applications. The group will assess the need for new protocols to support the requirements it identifies, and the Limitations document will report on this assessment. One recommendation it expects to document is for development of a virtual reality transfer protocol. Goals and Milestones: DEC 96 Meet at San Jose IETF review charter, review initial drafts of Scenarios and Limitations documents MAR 97 Substantially complete internet-drafts ready for review; work will be presented in Spring SISO workshop for feedback. MAY 97 Internet-drafts ready for WG Last Call JUN 97 Close group. JUN 97 Submit documents to the IESG for publication as Informational documents. Internet-Drafts: No Current Internet-Drafts. Request For Comments: RFC Stat Published Title ------- -- ----------- ------------------------------------ RFC2502 I FEB 99 Limitations of Internet Protocol Suite for Distributed Simulation the Large Multicast Environment RFC2729 I DEC 99 Taxonomy of Communication Requirements for Large-scale Multicast Applications