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Transport Layer Delay Analysis in Wireless Networks using Signal Flow Graphs

Authors
Gehlen, Guido and Walke, Bernhard
Department of Communication Networks (ComNets), Faculty 6, RWTH Aachen University Kontakt: Guido Gehlen

In Proceedings of European Wireless 2007, p. 7, Paris, France, 2007.
Publication Date: Apr, 2007
On page(s):7
ISBN: 2-912328-41-1
Abstract
The performance of transport layer protocols in wireless networks is difficult to analyze due to the behavior of the underlying wireless link layer. This paper presents a novel analytical modeling method for transport layer error control mechanisms in wireless networks. The layered modeling method presented is based on packet delay distributions which are derived from a link layer model regarding correlated radio block errors and a link layer Selective Repeat ARQ (SR-ARQ) mechanism. A canonical Hidden Markov Model (HMM) is used to model correlated radio block errors. The SR-ARQ on link layer, that corrects these block errors, is modeled by means of a matrix signal flow graph representing statistically the delays caused by correlated block errors. The modeling method on transport layer uses extended signal flow graphs where edges are weighted by Moment Generating Functions (MGFs) of the packet transmission delay. Results are presented in terms of applying the modeling method to a simple ARQ on top of UDP. The link layer model used is parameterized for GPRS.
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Bibtex
@INPROCEEDINGS{GuWa_EW07,
  AUTHOR          = {Gehlen, G. and Walke, B.},
  TITLE           = {Transport Layer Delay Analysis in Wireless Networks using Signal Flow
                    Graphs},
  YEAR            = {2007},
  MONTH           = {Apr},
  PAGES           = {7},
  ADDRESS         = {Paris, France},
  BOOKTITLE       = {Proceedings of European Wireless 2007},
  AFFILIATION     = {Department of Communication Networks (ComNets), Faculty 6, RWTH Aachen University},
  ISBN            = {2-912328-41-1},
  URL             = {http://www.comnets.rwth-aachen.de} 
}
Signature in CN-Library = {QK017 (2007)}
Letzte Änderung:  8.05.2008 12.16