Reconfigurable Relaying Topology in Cognitive Multihop Wireless Networks with Nonuniform Temporal and Spatial Traffic Distribution

The optimization of the relaying topology in multihop cellular network should provide the answer to the question who is transmitting to whom, and when, in such a way to insure the best system performance. In the case of temporally and spatially varying traffic distribution the optimal topology will also vary in time and an efficient way for topology reconfiguration is needed in order to maximize the system performance. In this paper we present algorithms for efficient search for the optimal relaying topology which is aware of the intercell interference requiring coordination action between the cells and resulting in multicell jointly optimal relaying topology. Numerical results demonstrate that a reconfigurable relaying topology provides the network utility improvements and presents the framework for quantifying these improvements for spatially and temporally varying traffic.