網際網路中，實時數據流測量工作組的簡稱，即Realtime Traffic Flow Measurement (RTFM)。
通過對基於流概念的實時流測量系統RFC 2722 RTFM的形式化描述，討論了實時流測量系統中各元素之間的關係。在實時流測量系統的基礎上，通過測量目標定義了系統中各元素間的協作關係，引入了資源策略伺服器組件，建立了維護系統資源一致性的機制和適合目前網際網路流量統計的分散式實時流監測體系結構，並討論了其原型系統的實現。
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.
