Wireless Personal Communications

, Volume 15, Issue 2, pp 125–144 | Cite as

Scalable Schemes for Call Admission and Handover in Cellular Networks with Multiple Services

  • Khalid Begain
  • Gunter Bolch
  • Miklós Telek


The introduction of new service categories withdifferent bandwidth requirements, e.g., data and multimedia, to cellularmobile radio networks makes many of the traditional mechanisms for controlingtraffic unusable orless efficient. The call admission and the handover handling are of the mostsensitive issues in this extension to new services. The performance of allservices includingthe traditional voice and the new services can be dramatically affected ifappropriate schemes are not used. In this paper, we propose call admission andhandover handling schemes for a cellular mobile network that offers twoservice types: voice and data. The data connections are assumed to transmitatdifferent transmission rates that are integer multiples to that of one radiochannel. In the case of congestion, the base station asks the active dataconnections to reduce their transmission rate in order to provide freechannels for the newly arrived request of both service types. This isbasically intended for incoming handover requests. The request will berejected if the transmission rate of the active connections reaches a givenminimum rate. Similar mechanism can also be used for new call arrivals, butsome priority can be given to handovers by setting a higher transmission ratethreshold for the new call rejection. As an extension to the proposedscalability, aqueuing of new calls is also proposed and analyzed. Analytical models werebuilt for the two proposed schemes together with the traditional channelreservation scheme. The effect of different traffic and configurationparameters on the performance measures like the grade of service, blockingprobabilities, and utilization, are studied using the proposed technique.Results show that the proposed schemes provide very good performance and morefairness among the different service types.

cellular mobile network call admission handover handling Markov models MOSEL language 


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Copyright information

© Kluwer Academic Publishers 2000

Authors and Affiliations

  • Khalid Begain
    • 1
  • Gunter Bolch
    • 2
  • Miklós Telek
    • 3
  1. 1.Department of Computer ScienceMu'tah UniversityMu'tahJordan
  2. 2.Department of Computer Science IVUniversity of Erlangen-NürnbergErlangenGermany
  3. 3.Department of TelecommunicationsTechnical University of BudapestBudapestHungary

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