Improve delay performance of wireless video streaming with active queue management

This paper proposed a packet scheduling algorithm to improve the quality of service (QoS) of video streaming over wireless network. We apply the active queue management (AQM) techniques at the Access Category (AC) queue of 802.11e WLAN EDCA to regulate the queuing delay. When a packet arrives, first the queuing probability is calculated to determine the probability the packet should be assigned to an AC queue. The queuing probability considers both queue length and load factor. Then the packet scheduling algorithm determines how to assign the packets to different AC queues. This design takes into account the queue length, the application requirement and the current network situation. Simulation results demonstrate that the proposed scheduling algorithm can improve the performance of video streaming over 802.11e EDCA. It can provide higher PSNR values and lower end-to-end delay compared to the standard 802.11e EDCA.