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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


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© W. Sheng and S. D. Blostein. 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.