A delay prediction based content and channel aware packet scheduler for real-time video over HSDPA

With the growing popularity of video applications, the provision of high-quality video transmission for multi-users over High Speed Downlink Packet Access ( HSDPA ) networks gradually becomes a research focus. In HSDPA, the downlink shared channel is shared among the users to transmit packets. Hence, the packet scheduling algorithms play an important role in the HSDPA system performance. In this paper, we propose a Delay Prediction based Content and Channel Aware (DPCCA) low-complexity scheduling algorithm for real-time video transmission over HSDPA. The basic idea is that a video user with lower packet delays should relinquish an extra scheduling opportunity to the video user with larger packet delays as compensation and a video user predicted to have inevitable packet loss due to timeout should transmit the important packets first to reduce the degradation of video quality. Simulation results show that the proposed scheduling algorithm outperforms the existing ones with respect to the received video quality and fairness for video transmission over HSDPA.