Downlink Scheduling and Resource Allocation forOFDM Systems

摘要

We consider scheduling and resource allocation forrnthe downlink of a OFDM-based wireless network. During eachrntime-slot the scheduling and resource allocation problem involvesrnselecting a subset of users for transmission, determining thernassignment of available subcarriers to selected users, and forrneach subcarrier determining the transmission power and therncoding and modulation scheme used. We address this in therncontext of a utility-based scheduling and resource allocationrnscheme presented in earlier papers. Scheduling and resourcernallocation is determined by solving an optimization problem,rnwhich is convex for a reasonable model of the feasible rates.rnBy exploiting the structure of this problem, we give optimal andrnsub-optimal algorithms for its solution. We provide simulationrnresults comparing different algorithms and parameter settings.