Cross-Layer Admission Control Policy for CDMA Beamforming 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, the authors 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.