A feasible neighbor discovery algorithm for coexistence control system over TVWS

This paper discusses a way to determine which devices interfere with each other in order to provide efficient information for coexistence control among dissimilar or independently operated networks in wireless communication environment over, specifically but not limited to, TV white space (TVWS) frequency bands. We refer this as coexistence neighbor discovery in TVWS. Coexistence neighbor discovery is a key algorithm for coexistence control system, which provides the necessary input for coexistence manager or for TVWS networks or devices subscribing for coexistence information service to make coexistence decisions. It therefore significantly impacts the complexity and accuracy of coexistence decision-making. In this paper the potential interference between two networks are statistically evaluated. The 90% confidential interference level that 90% of devices inside communication area receives interference equal or less than is taken as a potential interference of two networks. This value is then compared with the tolerable interference level of a device to determine interference relationship of two networks. The simulation results show the rational to select 90% as confidential interference level, the accuracy of the proposed algorithm was also approved in this paper.