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EURASIP Journal on Wireless Communications and Networking

, 2007:014562

Smart Antennas for Next Generation Wireless Systems


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.

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Autor: Wei Sheng - Steven D. Blostein


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