Cross Layer Design for Efficient Video Streaming over LTE Using Scalable Video Coding

Third Generation Partnership Project (3GPP) Long Term Evolution (LTE) offers high data rate capabilities to mobile users, and network operators are trying to deliver a true mobile broadband experience over LTE networks. Mobile TV and Video on Demand (VoD) are expected to be the main revenue generators in the near future, and efficient video streaming over wireless is the key to achieve this goal. In this paper, we propose a Scalable Video Coding (SVC) based video streaming scheme with dynamic adaptations and a scheduling scheme based on channel quality. Cross layer signaling between Medium Access Control (MAC) and Real Time Transport (RTP) protocols is used to achieve the channel dependent adaptation in video server. Channel Quality Indicator (CQI) feedbacks from User Equipments (UE) are used for dynamic adaptations. An adaptive Guaranteed Bit Rate (GBR) selection scheme based on CQI feedbacks is also presented, and this scheme improves the coverage of the cell. Simulation results indicate improved video quality for more number of users with reduced bit rate video traffic. Approximately 13% video quality gain is observed for users at the cell edge using this adaptation scheme.