WLC13-2: Reduced-Outage-Probability Algorithms for Cross-Layer Call Admission Control in CDMA Beamforming Systems

A new call admission control (CAC) algorithm based on an approximated power control feasibility condition is proposed for the uplink of a cellular system. While power control feasibility can be expressed in closed-form for the case of single antennas, an approximated power control feasibility condition is required for multiple antenna systems. This approximation, however, increases outage probability in the physical layer. In this paper, we investigate the mitigation of the outage problem in the context of cross-layer performance, and propose CAC algorithms for code-division multiple access (CDMA) beamforming systems. More specifically, these new methods achieve a network-layer performance gain, in terms of low connection delay and low blocking probability, while simultaneously guaranteeing physical-layer performance in terms of outage probability. In this paper, several reduced-outage-probability (ROP) algorithms are proposed. Numerical examples illustrating the performance and properties of these ROP are presented and compared.