Nulls preallocation in distributed DRA for multicell SDMA packet access networks

This paper proposes a novel distributed dynamic resource allocation (DRA) algorithm for the downlink of a SDMA broadband wireless packet network with multiple access ports and adaptive antennas. With the new scheme, each access port (AP) independently preallocates some beamforming s toward the most interfered users of the neighbor APs and broadcasts this information to the other APs. Then all APs independently and distributedly perform the allocation of their users using the distributed max-min fit (DMMF) scheme. Simulation results show a significant improvement over the DMMF without s preallocation and a significantly reduced gap between the DMMF and the centralized max-min fit (CMMF) algorithm, which performs the allocation by fully coordinating all the access ports. As a baseline case, the performance of a random slot allocation algorithm is also reported.