Telecommunication Systems

, Volume 5, Issue 1, pp 159–175 | Cite as

Architectural issues of ATM based connectionless overlay network

  • S. Aalto
  • I. Norros
  • J. T. Virtamo
  • J. L. van den Berg
  • E. Smeitink


Connectionless service such as SMDS, or its European equivalent CBDS, can be provided by an ATM network by building a separate connectionless overlay network (CLON) on top of the ATM bearer service. A CLON is composed of a number of connectionless servers, CLSs, which provide the routing function, connected by semipermanent virtual paths (VPs). In this paper, architectural issues related to the design of a CLON are studied. In particular, we address the question of the optimal number of CLSs and their interconnection topology, assuming the underlying ATM network and the mean connectionless traffic load are known. The objective of the design process is to meet given design criteria with minimum costs. The QoS requirements of the SMDS/CBDS service are briefly reviewed and a simple cost model for the CLON network is given. The dimensioning of the logical links is also considered. Then the design process to find the optimal solution for the whole network is outlined. A simplified procedure was applied in numerical studies of the topological optimization. In order to find the general dependence of the optimal number of CLSs on the size of the network and other network parameters, the optimization procedure was applied to a large number of sample ATM networks, generated by an algorithm which is briefly described. Results from these studies are presented and discussed.


Design Process Optimal Number Topological Optimization Traffic Load Cost Model 
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.


Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.


  1. [1]
    Bellcore, Generic system requirements in support of SMDS, Technical Report TR-TSV-000772, Issue 1, Bell Communications Research (1991).Google Scholar
  2. [2]
    D.W. Davies et al. (eds.),Computer Networks and Their Protocols (Wiley, New York, 1979).Google Scholar
  3. [3]
    R.W. Donaldson, Topological design of teleprocessing networks using linear regression clustering, IEEE Trans. Commun. 27 (1979) 1152–1159.Google Scholar
  4. [4]
    ETSI, Connectionless broadband data service (CBDS), Part 1: Overview, Draft Doc. ETS 300 217-1 (1992).Google Scholar
  5. [5]
    ETSI, Connectionless broadband data service (CBDS), Part 2: Basic bearer services definition, Draft Doc. ETS 300 217-2 (1992).Google Scholar
  6. [6]
    ETSI, Network aspects (NA); CBDS over ATM, Doc. Ref. DE/NA-53203, Draft (1992).Google Scholar
  7. [7]
    H.J. Fowler, W.E. Leland, Local area network traffic characteristics, with implications for broadband network congestion management, IEEE J. Select. Areas Commun. 9 (1991) 1139–1149.Google Scholar
  8. [8]
    R. Gúerin, H. Ahmadi and M. Naghshineh, Equivalent capacity and its application to bandwidth allocation in high speed networks, IEEE J. Select. Areas Commun. 9 (1991) 968–981.Google Scholar
  9. [9]
    ITU, B-ISDN functional architecture, Recommendation I.327 (1993).Google Scholar
  10. [10]
    I. Norros, A storage model with self-similar input, Queueing Systems 16 (1994) 387–396.Google Scholar
  11. [11]
    I. Norros, On the use of fractional Brownian motion in the theory of connectionless networks, IEEE J. Select. Areas Commun. 13(1995)953–962.Google Scholar
  12. [12]
    Wolfram Research,Guide to Standard Mathematica Packages, Version 2.2 (1993).Google Scholar

Copyright information

© J.C. Baltzer AG, Science Publishers 1996

Authors and Affiliations

  • S. Aalto
    • 1
  • I. Norros
    • 1
  • J. T. Virtamo
    • 1
  • J. L. van den Berg
    • 2
  • E. Smeitink
    • 2
  1. 1.VTT Information TechnologyFinland
  2. 2.KPN ResearchLeidschendamThe Netherlands

Personalised recommendations