关键词: 多媒体数据传输 公平 反馈拥塞控制算法

Abstract:

Real-time multimedia data transmission through the Internet is based on UDP. The transmission must be realtime and reliable. It also should be fair wi th the domain protocol TCP used by other services over the lnternet while sharing the limited bandwidth with TCP. Since packet loss and delay are usuall y caused by network congestion, we present a feedback congestion control scheme based on the real-time transport protocol （RTP） and the real-time tran  nsport control protocol （RTCP）, which can satisfy the real-time delivery system with loss and delay requirements. The paper discusses a rate-based TCP  P-friendly congcstion control mechanism named TFRC, studies its basic structure and some key details. In order to improve its performance of low jitter   for real-time applications, we provide a new algorithm of TFRC by using the jitter as a warning congestion signal. NS simulation verifies the new algori thm.

Key words: multimedia data transmission, fairness, feedback congestion control scheme