Abstract: In order to improve the QoS of real-time multimedia communication, this paper introduces RTT-based synthesis prediction by considering the influence of network delay and jitter for real-time flows comprehensively. On the basis of these, an improved adaptive flow control mechanism for real-time flows is proposed. Compared with the solution which is based on packet loss rate and RTT-based solution which only considers network delay, simulation results show that the propsed mechanism has higher adaptability by enhancing the stabilization of data flow and network bandwidth utilization efficiently.

Key words: real-time multimedia communication, adaptation control, Round Trip Time（RTT）, jitter ratio

摘要： 为了提高实时多媒体通信的服务质量，在综合考虑网络延迟和网络抖动对实时流媒体的影响下，定义了基于RTT的综合标志量。在此基础上，提出了一种改进的实时流量自适应控制机制。仿真结果表明，与基于丢包率和仅考虑延迟的RTT算法相比，该机制有效提高了数据流的平稳性和带宽的利用率，有更高的自适应性。

关键词: 实时多媒体通信, 自适应控制, 往返时间, 延迟抖动率