Call admission control in mobile cellular systems using fuzzy associative memory

Sivaramakrishna Mopati, Dilip Sarkar

Research output: Chapter in Book/Report/Conference proceedingConference contribution

4 Scopus citations

Abstract

In a mobile cellular system quality of service to mobile terminals (MTs) is measured by the probability of new call blocking Pb, and the probability of forced termination, Pft. Since the available bandwidth in a cell is very limited, both Pb and Pft cannot be reduced or avoided simultaneously. Usually keeping the Pft below a designated level is accepted as the measure of quality of service. Admission of new calls is controlled to reduce Pft. However, there are at least three parameters (new call arrival rate, mean duration of calls, and mobility of users) that can and change dynamically. Moreover, these parameters are related with Pft via complicated nonlinear equations. Therefore, call admission control (CAC) for maintaining a desired value of Pft is a very challenging task. No CAC algorithm has been reported in the past that can function well with dynamic changes to all these three parameters. We proposed an algorithm that addresses this issue. The new algorithm uses a fuzzy controller to adjust the call preblocking load value with the changing traffic parameters. The fuzzy controller makes use of fuzzy associative memory (FAM) to maintain the required QoS. The use of new system in dynamic traffic conditions is illustrated. Providing the required level of QoS, the algorithm also increases the channel utilization. The proposed CAC with FAM is compared and contrasted with previous CACs.

Original languageEnglish (US)
Title of host publicationProceedings - 12th International Conference on Computer Communications and Networks, ICCCN 2003
EditorsRonald P. Luijten, E.K. Park, Luiz DaSilva
PublisherInstitute of Electrical and Electronics Engineers Inc.
Pages95-100
Number of pages6
ISBN (Electronic)0780379454
DOIs
StatePublished - Jan 1 2003
Event12th IEEE International Conference on Computer Communications and Networks, ICCCN 2003 - Dallas, United States
Duration: Oct 20 2003Oct 22 2003

Publication series

NameProceedings - International Conference on Computer Communications and Networks, ICCCN
Volume2003-January
ISSN (Print)1095-2055

Other

Other12th IEEE International Conference on Computer Communications and Networks, ICCCN 2003
CountryUnited States
CityDallas
Period10/20/0310/22/03

Keywords

  • Associative memory
  • Bandwidth
  • Call admission control
  • Communication system traffic control
  • Computer science
  • Force measurement
  • Fuzzy control
  • Fuzzy systems
  • Nonlinear equations
  • Quality of service

ASJC Scopus subject areas

  • Computer Networks and Communications
  • Hardware and Architecture
  • Software

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    Mopati, S., & Sarkar, D. (2003). Call admission control in mobile cellular systems using fuzzy associative memory. In R. P. Luijten, E. K. Park, & L. DaSilva (Eds.), Proceedings - 12th International Conference on Computer Communications and Networks, ICCCN 2003 (pp. 95-100). [1284155] (Proceedings - International Conference on Computer Communications and Networks, ICCCN; Vol. 2003-January). Institute of Electrical and Electronics Engineers Inc.. https://doi.org/10.1109/ICCCN.2003.1284155