Joint Power and Admission Control based on Channel Distribution Information: A Novel Two-Timescale Approach

摘要

In this letter, we consider the joint power and admission control (JPAC)problem by assuming that only the channel distribution information (CDI) isavailable. Under this assumption, we formulate a new chance (probabilistic)constrained JPAC problem, where the signal to interference plus noise ratio(SINR) outage probability of the supported links is enforced to be not greaterthan a prespecified tolerance. To efficiently deal with the chance SINRconstraint, we employ the sample approximation method to convert them intofinitely many linear constraints. Then, we propose a convex approximation baseddeflation algorithm for solving the sample approximation JPAC problem. Comparedto the existing works, this letter proposes a novel two-timescale JPACapproach, where admission control is performed by the proposed deflationalgorithm based on the CDI in a large timescale and transmission power isadapted instantly with fast fadings in a small timescale. The effectiveness ofthe proposed algorithm is illustrated by simulations.