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Virtual reality (VR) is making waves around the world recently. However,traditional video streaming is not suitable for VR video because of the hugesize and view switch requirements of VR videos. Since the view of each user islimited, it is unnecessary to send the whole 360-degree scene at high qualitywhich can be a heavy burden for the transmission system. Assuming filed-of-view(FoV) of each user can be predicted with high probability, we can divide thevideo screen into partitions and send those partitions which will appear in FoVat high quality. Hence, we propose an novel strategy for VR video streaming.First, we define a quality-of-experience metric to measure the viewingexperience of users and define a channel model to reflect the fluctuation ofthe wireless channel. Next, we formulate the optimization problem and find itsfeasible solution by convex optimization. In order to improve bandwidthefficiency, we also add adaptive modulation to this part. Finally, we compareour algorithm with other VR streaming algorithm in the simulation. It turns outthat our algorithm outperforms other algorithms.

An Algorithm for Transmitting VR Video Based on Adaptive Modulation