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DiffServ Aggregation Strategies of Real Time Services in a W F2Q+ Schedulers Network

  • Rosario Giuseppe Garroppo
  • Stefano Giordano
  • Saverio Niccolini
  • Franco Russo
Conference paper
Part of the Lecture Notes in Computer Science book series (LNCS, volume 2170)

Abstract

The paper presents an analysis in a DiffServ network scenario of the achievable Quality of Service performance when different aggregation strategies between video and voice real time services are considered. Each network node of the analyzed DiffServ scenario is represented by a WF2Q+ scheduler. The parameters setting of the WF2Q+ scheduler is also discussed. In particular, the necessary network resources, estimated by the WF2Q+ parameters setting obtained considering the aggregation of traffic sources belonging to the same service class, are compared with those estimated on a per flow basis. The higher gain achievable using the first approach with respect to the second one, is also qualitatively highlighted. The simulation results evidence the possible problems that can be raised when voice traffic is merged with video service traffic. As a consequence, the paper results suggest to consider in different service class queues the two kinds of traffic.

Keywords

Buffer Size Aggregation Strategy Video Source Video Traffic Traffic Source 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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References

  1. 1.
    K. Dolzer, W. Payer, M. Eberspacher “A Simulation study on Traffic Aggregation in Multi-Service Networks”, Conference on High Performance Switching & Routing (joint IEEE ATM Workshop 2000), Heidelberg, Germany, 26-29 June, 2000Google Scholar
  2. 2.
    K. Dolzer, W. Payer “On aggregation strategies for multimedia traffic” Proceeding of the first Polish-German Teletraffic Symposium, Dresden, September 2000Google Scholar
  3. 3.
    S. Blake, D. Blake, M. Carlson, E. Davies, Z. Wang, W. Weiss “An architecture for Differentiated Services”, Internet RFC 2475, December, 1998Google Scholar
  4. 4.
    H. Naser, A. Garcia, O. Aboul-Magd “Voice over Differentiated Services”, Internet Draft, Diffserv Working Group, December, 1998Google Scholar
  5. 5.
    S. Keshav “An Engineering Approach to Computer Networking”, Addison-Wesley, January, 1998Google Scholar
  6. 6.
    J. Bennet, H. Zhang “WF2Q: Worst-case Fair Weighted Fair Queueing”, Proc. Of IEEE Infocom’ 96, March, 1996Google Scholar
  7. 7.
    J. N. Daigle, J. D. Langford “Models for Analysis of packet Voice Communications Systems”, IEEE JSAC, Vol. 6, pp 847–855, 1986Google Scholar
  8. 8.
    O. Rose “Statistical properties of MPEG video traffic and their impact on traffic modeling in ATM systems”, Un.of Wuerzburg-Inst. Of Computer Science Research Report Series. Report N. 101. February 1995Google Scholar
  9. 9.
    R.G. Garroppo, S. Giordano, M. Pagano, G. Procissi, “On the Relevance of Correlation Dependencies in On/Off Characterization of Broadband Traffic”, Proc. of IEEE ICC 2000, New Orleans, Louisiana, USA, 18-22 June, 2000Google Scholar
  10. 10.
    D. Stiliadis, A. Varma, “Latency-Rate Servers: A general model for analysis of traffic scheduling algorithms”, Tech. Rep. UCSC-CRL-95-38, July 1995Google Scholar
  11. 11.
    A. Charny, F. Baker et al. “EF PHB Redefined” Internet Draft, http://search.ietf.org/internet-drafts/draft-charny-ef-definition-01.txt, November, 2000
  12. 12.
    R. Bruno, R.G. Garroppo, S. Giordano “Estimation of token bucket parameters of VoIP traffic”, Proc. of IEEE ATM Workshop 2000, Heidelberg, Germany, 26-29 June, 2000Google Scholar

Copyright information

© Springer-Verlag Berlin Heidelberg 2001

Authors and Affiliations

  • Rosario Giuseppe Garroppo
    • 1
  • Stefano Giordano
    • 1
  • Saverio Niccolini
    • 1
  • Franco Russo
    • 1
  1. 1.Department of Information EngineeringUniversity of PisaPisaItaly

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