Bandwidth Efficient and Rate-Adaptive Video Delivery in TV White Space

Video delivery in television white space (TVWS) is a challenging task due to the variation of the spectrum availability in TVWS and the stringent bandwidth requirements of video streaming. Most existing frameworks employ an opportunistic spectrum access style which result in bandwidth inefficiency since only one spectrum hole in TVWS can be used. In this paper, we propose a bandwidth efficient TVWS video delivery framework. First, a multisector structure is employed to improve the bandwidth efficiency. Second, a novel spectrum sensing scheme and an efficient spectrum selection algorithm are proposed to obtain the optimal spectrum holes based on this structure. Third, a joint optimization approach is proposed to create an optimal map between the sectors and the spectrum, and to adapt the video rate commensurate with dynamic channel conditions. The simulation results demonstrate that the proposed framework can obtain significantly higher bandwidth efficiency and superior video performance than traditional approaches.