Recommendation ITU-T Y.2771 provides a framework for deep packet inspection (DPI). The primary purpose of this framework is to describe a structured approach for designing, defining and implementing DPI solutions in support of service/application awareness for facilitating interoperability in the evolving networks. It serves to identify and assist in understanding the network issues, from primarily an architectural viewpoint. This Recommendation also provides DPI framework aspects from modelling and performance.
The purpose of such frameworks is especially to outline possible relationships between a DPI function and other network functions, to assist in identifying requirements for DPI functions (which would be the subject of other ITU-T Recommendations like, e.g., Recommendation ITU-T Y.2770) and to help for terminology work (e.g., when a definition would be related to a functional model).