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An NS module for simulation of HSDPA
Luleå University of Technology, Department of Computer Science, Electrical and Space Engineering, Signals and Systems.
Luleå University of Technology, Department of Computer Science, Electrical and Space Engineering, Signals and Systems.
2006 (English)Report (Other academic)
Abstract [en]

We have implemented functionality from the High Speed Downlink Packet Access (HSDPA) mode as an extension to ns-2 (the Network Simulator version 2). Ns-2 is a well-known simulation platform frequently used in network research. It includes detailed models of transport protocols, queueing strategies, etc. The code is open source, which is in line with the research ideal that results and methods should be made available both for validation of results and for further studies. We see a need for our simulator because mobile cellular systems are merging with the wired Internet creating an all-IP network. This surfaces problems related to TCP performance, Quality of Service, user behaviour to name a few. Modelling of high-speed cellular networks, from an Internet point of view, is therefore needed. When the current TCP/IP protocol suite was designed, assumptions were made about the delay and loss characteristics of the underlying links. The initial wireless IP networks suffered from problems in situations when the assumptions were not met and numerous solutions have been proposed. To answer questions related to the TCP/IP protocol suite our module is fitted with detailed models of TCP and factors which will have a significant impact on its performance. Our simulator is therefore a system-level simulator. It does not do exact modelling of the link layer. Instead models of the link layer that captures the behaviours essential to upper layers are used. We believe that the upper layers will have a greater impact on the problems we want to study than the lower layers. The purpose of this report is to describe the models used in our simulator. For better understanding of our models, we also include descriptions of the system modelled. This report is not a manual for performing simulations with our simulator. The work on this simulator was started by Ulf Bodin.

Place, publisher, year, edition, pages
Luleå: Luleå tekniska universitet, 2006. , 16 p.
Technical report / Luleå University of Technology, ISSN 1402-1536 ; 2006:03
URN: urn:nbn:se:ltu:diva-23651Local ID: 7d642af0-7d94-11db-8824-000ea68e967bOAI: diva2:996700
Godkänd; 2006; 20061126 (ysko)Available from: 2016-09-29 Created: 2016-09-29Bibliographically approved

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