Resource allocation with power-shaping in fixed broadband wireless access systems

This paper investigates a new resource allocation technique for TDMA-based fixed broadband wireless access systems (FBWA) with full frequency reuse where base stations assign radio resources in an uncoordinated fashion. This technique, named power-shaped advanced resource assignment (PSARA) exploits an appropriate set of power profiles that limit (or shape) the power transmitted in each slot of the frame with the aim of helping the allocation algorithm to efficiently distribute the intercell and intersector interference inside the frame. Simulation results for a typical cellular FBWA system show that this technique significantly improves the capacity with respect to other techniques previously proposed, e.g. the enhanced staggered resource assignment (ESRA), even when they use power control. Moreover, an analytical framework useful to understand the concept of power-shaping and to discuss some guidelines for the design of power profiles is provided.