Playout buffer and DRX aware scheduling scheme for video streaming over 3GPP LTE system

In this paper, a playout buffer and DRX aware scheduling scheme(PBDAS) is proposed to improve the user experience of the video streaming over the DRX enabled LTE systems. By considering the UE playout buffer level and the DRX cycle length, we define the remaining playout time, which can effectively indicate the UEs´ urgency. Based on their urgency, the UEs are assigned with different forms of scheduling metrics, with which the resource allocation is accomplished. Specifically, PBDAS would allocate the radio resource to the UEs whose playout process are more likely to be interruptted. The scheme has advantages in two aspects. On one hand, the annoying playout interruptions could be effectively avoided or shortened. On the other hand, the power saving performance could be improved without deteriorating the playout continuity. The simulation results demonstrate that our algorithm can not only improve the playout continuity but also decrease the power consumption.