Open Access

Performance of a Two-Level Call Admission Control Scheme for DS-CDMA Wireless Networks

EURASIP Journal on Wireless Communications and Networking20072007:021808

https://doi.org/10.1155/2007/21808

Received: 8 May 2007

Accepted: 23 August 2007

Published: 12 November 2007

Abstract

We propose a two-level call admission control (CAC) scheme for direct sequence code division multiple access (DS-CDMA) wireless networks supporting multimedia traffic and evaluate its performance. The first-level admission control assigns higher priority to real-time calls (also referred to as class 0 calls) in gaining access to the system resources. The second level admits nonreal-time calls (or class 1 calls) based on the resources remaining after meeting the resource needs for real-time calls. However, to ensure some minimum level of performance for nonreal-time calls, the scheme reserves some resources for such calls. The proposed two-level CAC scheme utilizes the delay-tolerant characteristic of non-real-time calls by incorporating a queue to temporarily store those that cannot be assigned resources at the time of initial access. We analyze and evaluate the call blocking, outage probability, throughput, and average queuing delay performance of the proposed two-level CAC scheme using Markov chain theory. The analytic results are validated by simulation results. The numerical results show that the proposed two-level CAC scheme provides better performance than the single-level CAC scheme. Based on these results, it is concluded that the proposed two-level CAC scheme serves as a good solution for supporting multimedia applications in DS-CDMA wireless communication systems.

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Authors’ Affiliations

(1)
Department of Electrical and Computer Engineering, The University of Calgary

References

  1. Liu Z, El Zarki M: SIR-based call admission control for DS-CDMA cellular systems. IEEE Journal on Selected Areas in Communications 1994,12(4):638-644. 10.1109/49.286670View ArticleGoogle Scholar
  2. Lee J, Han Y: Downlink admission control for multimedia services in WCDMA. Proceedings of the 13th IEEE International Symposium on Personal, Indoor and Mobile Radio Communications (PIMRC '02), September 2002, Lisbon, Portugal 5: 2234-2238.View ArticleGoogle Scholar
  3. Jeon WS, Jeong DG: Call admission control for mobile multimedia communications with traffic asymmetric between uplink and downlink. IEEE Transactions on Vehicular Technology 2001,50(1):59-66. 10.1109/25.917873View ArticleGoogle Scholar
  4. Casoni M, Immovilli G, Merani ML: Admission control in T/CDMA systems supporting voice and data applications. IEEE Transactions on Wireless Communications 2002,1(3):540-548. 10.1109/TWC.2002.800552View ArticleGoogle Scholar
  5. Comaniciu C, Mandayam NB, Famolari D, Agrawal P: Wireless access to the World Wide Web in an integrated CDMA system. IEEE Transactions on Wireless Communications 2003,2(3):472-483. 10.1109/TWC.2003.811051View ArticleGoogle Scholar
  6. Larijani PR, Hafez RH, Lambadaris I: Two level access control strategy for multimedia CDMA. Proceedings of IEEE International Conference on Communications (ICC '98), June 1998, Atlanta, Ga, USA 1: 487-492.Google Scholar
  7. Comaniciu C, Mandayam NB, Famolari D, Agrawal P: QoS guarantees for third generation (3G) CDMA systems via admission and flow control. Proceedings of the 52nd Vehicular Technology Conference (VTC '00), September 2000, Boston, Mass, USA 1: 249-256.Google Scholar
  8. Liu T-K, Silvester J: Joint admission/congestion control for wireless CDMA systems supporting integrated services. IEEE Journal on Selected Areas in Communications 1998,16(6):845-857. 10.1109/49.709448View ArticleGoogle Scholar
  9. Soroushnejad M, Geraniotis E: Multi-access strategies for an integrated voice/data CDMA packet radio network. IEEE Transactions on Communications 1995,43(2–4):934-945.View ArticleGoogle Scholar
  10. Jeon WS, Jeong DG: Call admission control for CDMA mobile communications systems supporting multimedia services. IEEE Transactions on Wireless Communications 2002,1(4):649-659. 10.1109/TWC.2002.804189View ArticleGoogle Scholar
  11. Sampath A, Holtzman JM: Access control of data in integrated voice/data CDMA systems: benefits and trade-off. IEEE Journal on Selected Areas in Communications 1987,15(8):1511-1526.View ArticleGoogle Scholar
  12. Ayyagari D, Ephremides A: Optimal admission control in cellular DS-CDMA systems with multimedia traffic. IEEE Transactions on Wireless Communications 2003,2(1):195-202. 10.1109/TWC.2002.806396View ArticleGoogle Scholar
  13. Singh S, Krishnamurthy V, Poor HV: Integrated voice/data call admission control for wireless DS-CDMA systems. IEEE Transactions on Signal Processing 2002,50(6):1483-1495. 10.1109/TSP.2002.1003071MathSciNetView ArticleGoogle Scholar
  14. Sampath A, Kumar P, Holtzman JM: Power control and resource management for a multimedia CDMA wireless system. Proceedings of the 6th IEEE International Symposium on Personal, Indoor and Mobile Radio Communications (PIMRC '95), September 1995, Toronto, Canada 1: 21-25.View ArticleGoogle Scholar
  15. Aïssa S, Kuri J, Mermelstein P: Call admission on the uplink and downlink of a CDMA system based on total received and transmitted powers. IEEE Transactions on Wireless Communications 2004,3(6):2407-2416. 10.1109/TWC.2004.838415View ArticleGoogle Scholar
  16. Paschos GS, Politis ID, Kotsopoulos SA: A quality of service negotiation-based admission control scheme for WCDMA mobile wireless multiclass services. IEEE Transactions on Vehicular Technology 2005,54(5):1875-1886. 10.1109/TVT.2005.853455View ArticleGoogle Scholar
  17. Yang X, Feng G, Kheong DSC: Call admission control for multiservice wireless networks with bandwidth asymmetry between uplink and downlink. IEEE Transactions on Vehicular Technology 2006,55(1):360-368. 10.1109/TVT.2005.861202View ArticleGoogle Scholar
  18. Li W, Chao X: Call admission control for an adaptive heterogeneous multimedia mobile network. IEEE Transactions on Wireless Communications 2007,6(2):515-525.View ArticleGoogle Scholar
  19. Viterbi AM, Viterbi AJ: Erlang capacity of a power controlled CDMA system. IEEE Journal on Selected Areas in Communications 1993,11(6):892-900. 10.1109/49.232298View ArticleGoogle Scholar
  20. Sampath A, Mandayam NB, Holtzman JM: Erlang capacity of a power controlled integrated voice and data CDMA system. Proceedings of the 47th IEEE Vehicular Technology Conference (VTC '97), May 1997, Phoenix, Ariz, USA 3: 1557-1561.Google Scholar
  21. Ross SM: Introduction to Probability Models. Academic Press, London, UK; 1985.MATHGoogle Scholar
  22. Kleinrock L: Queueing Systems. Volume 1: Theory. John Wiley & Sons, New York, NY, USA; 1975.MATHGoogle Scholar

Copyright

© A. O. Fapojuwo and Y. Huang. 2007

This article is published under license to BioMed Central Ltd. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.