Subchannel allocation based on graph theory in a single cell of WRAN

Based on the analysis of the interference between the Base Station (BS) to wireless microphones (WMs) and Consumer Premise Equipments (CPEs) to WMs in Wireless Regional Area Network (WRAN), a new WRAN-WM coexistence model is proposed. A mathematical model of subchannel allocation in a single cell of WRAN is established which target is maximizing the data transmission rate for downlink of system. Modeling the subchannel allocation as finding a maximal matching of the bipartite graph, we get the optimal solution to employ hungarian algorithm to solve the problem which is a mixed-integer nonlinear programming. The simulation results show that the proposed scheme is very effective.