Coexistence among Device-to-Device communications in TV white space based on geolocation database

摘要

Device-to-Device (D2D) communication as a resource reuse technique underlaying TV white space (TVWS) can bring significant potential benefits. In this paper, we address the coexistence between primary TV receiver and multiple D2D links as well as coexistence among different D2D links in a cell. Relying on geo-location database, the access point coordinates channel allocation for D2D links and regulate power level of devices, aiming to realize coexistence goal. Firstly, we formulate the coexistence problem under the constraint of aggregate interference model, including co-channel and adjacent channel interference in the analysis. Then according to the formulated coexistence problem we propose an algorithm, as a result the algorithm could find the channel assignment policy and power control scheme for each D2D link. Further, we compare the proposed coexistence scheme with the state-of-the-art method, it is shown that our proposed algorithm outperforms in terms of total throughput. In addition, we quantitatively analyze the parameters closely affect the throughput performance of the cell, which shows a guideline of improvement in coexistence.