Telecommunication Systems

, Volume 27, Issue 1, pp 47–66 | Cite as

Performance of Hierarchical Aggregation in Differentiated Services Networks

  • Susana Sargento
  • Rui Valadas


We address the use of hierarchical aggregation in DiffServ networks. We propose two analytical models to study the tradeoffs between signaling load and resource utilization. In the case of the signaling load, we introduce a novel performance metric that captures, simultaneously, the state information stored and the rate of signaling messages processed at routers. In the first analytical model, based on multidimensional birth–death processes, the offered load is detailed at the flow level, which allows accurate assessment of the signaling load. The second analytical model accommodates time-varying offered loads, which allows studying the tradeoffs between the time-scale of the aggregate demand and the time-scale of signaling. Our results, which also include analysis using measured traces, show that hierarchical aggregation can introduce very high signaling gains with a small penalty in terms of resource utilization, allowing significant savings in terms of network cost.


Resource Utilization Accurate Assessment Service Network Signaling Gain Aggregate Demand 
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Copyright information

© Kluwer Academic Publishers 2004

Authors and Affiliations

  • Susana Sargento
    • 1
  • Rui Valadas
    • 1
  1. 1.Institute of TelecommunicationsUniversity of AveiroAveiroPortugal

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