互联网中，实时数据流测量工作组的简称，即Realtime Traffic Flow Measurement (RTFM)。

通过对基于流概念的实时流测量系统RFC 2722 RTFM的形式化描述，讨论了实时流测量系统中各元素之间的关系。在实时流测量系统的基础上，通过测量目标定义了系统中各元素间的协作关系，引入了资源策略服务器组件，建立了维护系统资源一致性的机制和适合目前因特网流量统计的分布式实时流监测体系结构，并讨论了其原型系统的实现。

Realtime Traffic Flow Measurement (RTFM) system architecture RFC2722 is described based on the concept of flow. The relations among elements RTFM system are also discussed. Based on RTFM, resource policy service component maintaining the consistency of system resource is introduced. The cooperating relations between each element are defined on the measurement object. Consequently, a distributed traffic flow measurement system architecture that adapt to Internet traffic management is given and the implementation of prototype system is discussed.