摘要：Streaming services over the Internet are expected to grow rapidly in the near
future. However, bursty packet losses caused by buffer overflow at routers are a serious
problem in these services, and are responsible for degradation of the Quality of Service
(QoS). Active Queue Management (AQM) that discards the packets at routers is
effective for avoiding the buffer overflow but results in the degradation of QoS as well
unless it takes into account the characteristic of the streaming media. Generally, the
streaming media implement forward error correction (FEC) that is a promising
technique to recover the lost packets during transmission at receiver ends. In this paper,
a packet discarding scheme considering the FEC recovery ability and the video
encoding method at routers is proposed. This packet discarding scheme is provided by
combining the assigning priority to the media packets at the sender end and the simple
packet discarding scheme at the routers. Thus, these proposed methods reduce the
packet loss ratios and improve the QoS of streaming media. The results of computer
simulations show that the packet loss ratio of the proposed method is highly improved
compared to the conventional method even for highly congested networks.
关键词：video streaming, video on demand, packet loss ratio, packet discarding,
forward error correction
