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Limitations of Internet Protocol Suite for Distributed Simulation the Large Multicast Environment (RFC2502)

IP.com Disclosure Number: IPCOM000003085D
Original Publication Date: 1999-Feb-01
Included in the Prior Art Database: 2000-Sep-13
Document File: 9 page(s) / 26K

Publishing Venue

Internet Society Requests For Comment (RFCs)

Related People

M. Pullen: AUTHOR [+3]

Abstract

The Large-Scale Multicast Applications (LSMA) working group was chartered to produce documents aimed at a consensus based development of the Internet protocols to support large scale multicast applications including real-time distributed simulation. This memo defines services that LSMA has found to be required, and aspects of the Internet protocols that LSMA has found to need further development in order to meet these requirements.

This text was extracted from a ASCII Text document.
This is the abbreviated version, containing approximately 11% of the total text.

Network Working Group M. Pullen

Request for Comments: 2502 George Mason University

Category: Informational M. Myjak

The Virtual Workshop

C. Bouwens

SAIC

February 1999

Limitations of Internet Protocol Suite for Distributed Simulation

in the Large Multicast Environment

Status of this Memo

This memo provides information for the Internet community. It does

not specify an Internet standard of any kind. Distribution of this

memo is unlimited.

Copyright Notice

Copyright (C) The Internet Society (1999). All Rights Reserved.

Abstract

The Large-Scale Multicast Applications (LSMA) working group was

chartered to produce documents aimed at a consensus based development

of the Internet protocols to support large scale multicast

applications including real-time distributed simulation. This memo

defines services that LSMA has found to be required, and aspects of

the Internet protocols that LSMA has found to need further

development in order to meet these requirements.

1. The Large Multicast Environment

The Large-Scale Multicast Applications working group (LSMA) was

formed to create a consensus based requirement for Internet Protocols

to support Distributed Interactive Simulation (DIS) [DIS94], its

successor the High Level Architecture for simulation (HLA) [DMSO96],

and related applications. The applications are characterized by the

need to distribute a real-time applications over a shared wide area

network in a scalable manner such that numbers of hosts from a few to

tens of thousands are able to interchange state data with sufficient

reliability and timeliness to sustain a three dimensional virtual,

visual environment containing large numbers of moving objects. The

network supporting such an system necessarily will be capable of

multicast [IEEE95a,IEEE95b].

Distributed Interactive Simulation is the name of a family of

protocols used to exchange information about a virtual environment

among hosts in a distributed system that are simulating the behavior

of objects in that environment. The objects are capable of physical

interactions and can sense each other by visual and other means

(infrared, etc.). DIS was developed by the U.S. Department of

Defense (DoD) to implement systems for military training, rehearsal,

and other purposes. More information on DIS can be found in [SSM96].

The feature of distributed simulation that drives network

requirements is that it is intended to work with output to and input

from humans across distributed simulators in real time. This places

tight limits on latency between hosts. It also means that any

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