La VoLTE: Novel Cross Layer Optimized Mechanism of Video Transmission over LTE for DRX

Power efficiency in broadband wireless access networks has emerged as a very important area of research worldwide. 4G wireless standards such as the 3GPP LTE have attempted to address this issue through mechanisms such as Discontinuous Reception (DRX) which can enhance the battery performance in user equipments (UEs) and improve resource utilization at the base station (eNodeB) especially for applications characterized by long periods of inactivity such as the WWW. However, DRX in connected mode has not been optimized for real time applications such as Mobile TV and Video on Demand (VoD) which require strict latency and QoS uarantees. This paper presents a novel mechanism, La VoLTE, based on time series prediction and enhanced eNodeB architecture to determine DRX opportunities during video streaming over Real Time Protocol (RTP) in a TDD-LTE network without compromising the QoS. Through extensive simulations, it is found that the proposed mechanism can result in 30-80 percent power saving over the video transmission duration depending on video data for different video quality and bandwidth requirements.