STOCHASTIC RESOURCE ALLOCATION FOR ORTHOGONAL ACCESS BASED ON QUANTIZED CSI: OPTIMALITY, CONVERGENCE AND DELAY ANALYSIS

Dynamic allocation of power, rate and channel access is a critical task in wireless networks. Capitalizing on convex op-timization and stochastic approximation tools, this paper de-velops a stochastic resource allocation algorithm that mini-mizes average transmit power under individual average rate constraints. Focus is placed on networks where users trans-mit orthogonally over a set of parallel channels and transmis-sions are adapted based on quantized channel state informa-tion (CSI) allowing even channel statistics to be unknown. Convergence of the developed stochastic scheme is charac-terized and the average queue delays are obtained in closed form. Index Terms — Resource management, cross-layer de-sign, stochastic approximation, multiuser channels, delay ef-fects. 1