Enabling Large-Scale Multicast Simulation by Reducing Memory Requirements

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Please use this identifier to cite or link to this item: http://hdl.handle.net/1853/12302

Title: Enabling Large-Scale Multicast Simulation by Reducing Memory Requirements
Author: Xu, Donghua ; Riley, George F. ; Ammar, Mostafa H. (Mostafa Hamed) ; Fujimoto, Richard M.
Abstract: The simulation of large–scale multicast networks often requires a significant amount of memory that can easily exceed the capacity of current computers, both because of the inherently large amount of state necessary to simulate message routing and because of design oversights in the multicast portion of existing simulators. In this paper we describe three approaches to substantially reduce the memory required by multicast simulations: 1) We introduce a novel technique called “negative forwarding table” to compress mutlicast routing state. 2) We aggregate the routing state objects from one replicator per router per group per source to one replicator per router. 3) We employ the NIx– Vector technique to replace the original unicast IP routing table. We implemented these techniques in the ns2 simulator to demonstrate their effectiveness. Our experiments show that these techniques enable packet level multicast simulations on a scale that was previously unachievable on modern workstations using ns2.
Description: ©2003 IEEE. Personal use of this material is permitted. However, permission to reprint/republish this material for advertising or promotional purposes or for creating new collective works for resale or distribution to servers or lists, or to reuse any copyrighted component of this work in other works must be obtained from the IEEE. This material is presented to ensure timely dissemination of scholarly and technical work. Copyright and all rights therein are retained by authors or by other copyright holders. All persons copying this information are expected to adhere to the terms and constraints invoked by each author's copyright. In most cases, these works may not be reposted without the explicit permission of the copyright holder. Presented at the Workshop on Parallel and Distributed Simulation (PADS), June 2003
Type: Proceedings
URI: http://hdl.handle.net/1853/12302
Date: 2003-06
Contributor: Georgia Institute of Technology. College of Computing
Georgia Institute of Technology. School of Electrical and Computer Engineering
Publisher: Georgia Institute of Technology
Institute of Electrical and Electronics Engineers, Inc., New York
Subject: IP networks
Computational complexity
Digital simulation
Multicast communication
Storage management
Telecommunication computing
Telecommunication network routing

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