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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

https://doi.org/10.1155/2007/14562

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

Abstract

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.

Keywords

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

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Authors’ Affiliations

(1)
Department of Electrical and Computer Engineering, Queen's University, Walter Light Hall (19 Union Street), Kingston, Ontario, K7L 3N6, Canada

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