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)


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.


Buffer Size Aggregation Strategy Video Source Video Traffic Traffic Source 
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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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