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  • Research Article
  • Open Access

Cross-Layer Admission Control Policy for CDMA Beamforming Systems

EURASIP Journal on Wireless Communications and Networking20072007:014562

  • Received: 31 October 2006
  • Accepted: 1 August 2007
  • Published:


A novel admission control (AC) policy is proposed for the uplink of a cellular CDMA beamforming system. An approximated power control feasibility condition (PCFC), required by a cross-layer AC policy, is derived. This approximation, however, increases outage probability in the physical layer. A truncated automatic retransmission request (ARQ) scheme is then employed to mitigate the outage problem. In this paper, we investigate the joint design of an AC policy and an ARQ-based outage mitigation algorithm in a cross-layer context. This paper provides a framework for joint AC design among physical, data-link, and network layers. This enables multiple quality-of-service (QoS) requirements to be more flexibly used to optimize system performance. Numerical examples show that by appropriately choosing ARQ parameters, the proposed AC policy can achieve a significant performance gain in terms of reduced outage probability and increased system throughput, while simultaneously guaranteeing all the QoS requirements.


  • Control Policy
  • Outage Probability
  • Physical Layer
  • Admission Control
  • Performance Gain


Authors’ Affiliations

Department of Electrical and Computer Engineering, Queen's University, Walter Light Hall (19 Union Street), Kingston, Ontario, K7L 3N6, Canada


  1. Andersin M, Rosberg Z, Zander J: Soft and safe admission control in power-controlled mobile systems. IEEE/ACM Transactions on Networking 1997,5(2):255-265. 10.1109/90.588096View ArticleGoogle Scholar
  2. Bao Y, Sethi AS: Performance-driven adaptive admission control for multimedia applications. Proceedings of IEEE International Conference on Communications (ICC '99), June 1999, Vancouver, BC, Canada 1: 199-203.Google Scholar
  3. 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
  4. Comaniciu C, Poor HV: Jointly optimal power and admission control for delay sensitive traffic in CDMA networks with LMMSE receivers. IEEE Transactions on Signal Processing 2003,51(8):2031-2042. 10.1109/TSP.2003.814467MathSciNetView ArticleGoogle Scholar
  5. 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
  6. Yu F, Krishnamurthy V, Leung VCM: Cross-layer optimal connection admission control for variable bit rate multimedia traffic in packet wireless CDMA networks. IEEE Transactions on Signal Processing 2006,54(2):542-555.View ArticleGoogle Scholar
  7. Telatar IE: Capacity of multi-antenna Gaussian channels. European Transactions on Telecommunications 1999,10(6):585-595. 10.1002/ett.4460100604View ArticleGoogle Scholar
  8. Yener A, Yates RD, Ulukus S: Combined multiuser detection and beamforming for CDMA systems: filter structures. IEEE Transactions on Vehicular Technology 2002,51(5):1087-1095. 10.1109/TVT.2002.800616View ArticleGoogle Scholar
  9. Alamouti SM: A simple transmit diversity technique for wireless communications. IEEE Journal on Selected Areas in Communications 1998,16(8):1451-1458. 10.1109/49.730453View ArticleGoogle Scholar
  10. Hassibi B, Hochwald BM: High-rate codes that are linear in space and time. IEEE Transactions on Information Theory 2002,48(7):1804-1824. 10.1109/TIT.2002.1013127MathSciNetView ArticleMATHGoogle Scholar
  11. Tarokh V, Seshadri N, Calderbank AR: Space-time codes for high data rate wireless communication: performance criterion and code construction. IEEE Transactions on Information Theory 1998,44(2):744-765. 10.1109/18.661517MathSciNetView ArticleMATHGoogle Scholar
  12. Foschini GJ: Layered space-time architecture for wireless communication in a fading environment when using multi-element antennas. Bell Labs Technical Journal 1996,1(2):41-59.View ArticleGoogle Scholar
  13. Blostein SD, Leib H: Multiple antenna systems: their role and impact in future wireless access. IEEE Communications Magazine 2003,41(7):94-101. 10.1109/MCOM.2003.1215645View ArticleGoogle Scholar
  14. Rashid-Farrokhi F, Tassiulas L, Liu KJR: Joint optimal power control and beamforming in wireless networksusing antenna arrays. IEEE Transactions on Communications 1998,46(10):1313-1324. 10.1109/26.725309View ArticleGoogle Scholar
  15. Song G, Gong K: Performance comparison of optimum beamforming and spatially matched filter in power-controlled CDMA systems. Proceedings of IEEE International Conference on Communications (ICC '02), April-May 2002, New York, NY, USA 1: 455-459.View ArticleGoogle Scholar
  16. Wyglinski AM, Blostein SD: On uplink CDMA cell capacity: mutual coupling and scattering effects on beamforming. IEEE Transactions on Vehicular Technology 2003,52(2):289-304.Google Scholar
  17. Pedersen KI, Mogensen PE: Directional power-based admission control for WCDMA systems using beamforming antenna array systems. IEEE Transactions on Vehicular Technology 2002,51(6):1294-1303. 10.1109/TVT.2002.804855View ArticleGoogle Scholar
  18. Evans J, Tse DNC: Large system performance of linear multiuser receivers in multipath fading channels. IEEE Transactions on Information Theory 2000,46(6):2059-2078. 10.1109/18.868478MathSciNetView ArticleMATHGoogle Scholar
  19. Brueck S, Jugl E, Kettschau H-J, Link M, Mueckenheim J, Zaporozhets A: Radio resource management in HSDPA and HSUPA. Bell Labs Technical Journal 2007,11(4):151-167. 10.1002/bltj.20201View ArticleGoogle Scholar
  20. Liu Q, Zhou S, Giannakis GB: Cross-layer combining of adaptive modulation and coding with truncated ARQ over wireless links. IEEE Transactions on Wireless Communications 2004,3(5):1746-1755. 10.1109/TWC.2004.833474View ArticleGoogle Scholar
  21. Sampath A, Kumar PS, 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
  22. Wyglinski A: Performance of CDMA systems using digital beamforming with mutual coupling and scattering effects, M.S. thesis. Queen's University, Kingston, Ontario, Canada; 2000.Google Scholar
  23. Tijms HC: Stochastic Modelling and Analysis: A Computational Approach. John Wiley & Sons, Chichester, UK; 1986.Google Scholar