QoE-Aware Video Collaborative Distribution Mechanism in Cloud Radio Access Networks

摘要

In this paper, a video collaborative distribution mechanism is studied in Cloud Radio Access Networks (C-RANs) with object to guarantee the quality of experience (QoE) for different users. Specifically, a framework which enables the remote radio head (RRH)-to-device (R2D) technology to cooperate with the device-to-device (D2D) technology is constructed to transmit video traffic efficiently. Besides, a new QoE evaluation model is built in terms of the transition characteristics of video quality version and the interruption characteristics of video transmissions. Then, the optimal choice of video quality version is studied to achieve a good tradeoff among the video quality, interruption and smoothness for a target user. Moreover, a resource allocation policy is proposed to reduce the mean latency caused by video interruption of the whole network. Simulation results verify that the proposed mechanism performs better than other existing ones when the latency jointly caused by the quality version transition and the transmission interruption is sensitive to the users.