A User Plane Function, UPF, arranged for detecting Quick User Datagram Protocol Internet Connections, QUIC, traffic in a telecommunication network between a User Equipment, UE, and a Content Provider, CP, wherein said UE has an established application session with said CP, for a particular application, using QUIC as transport protocol, wherein said UPF comprises:
- receive equipment arranged for receiving, from said CP, a list of connection identifiers that identify said established application session between said UE and said CP, and for receiving, by said UPF, a QUIC packet comprising a connection identifier;
- detect equipment arranged for detecting said QUIC traffic by determining that said connection identifier of said received QUIC packet is comprised by said list of connection identifiers.