Methods, apparatuses and systems for configuring a network-endpoint user-plane metadata

A method, implemented in an entity of a core network, the method comprising:

• receiving a first message comprising first information indicating usage of one or more metadata parameters for data flow communication between network endpoint nodes through the core network;
• receiving, from a first network endpoint node, a second message comprising second information indicating a first request for providing the one or more metadata parameters related to the data flow communication with a second network endpoint node;
• transmitting, to the first network endpoint node, a third message comprising third information indicating the one or more metadata parameters related to the data flow communication with the second network endpoint node;
• receiving, from the second network endpoint node, a data flow;
• performing one or more measurements on the data flow based on the one or more metadata parameters;
• and
• transmitting, to any of the first network endpoint node, the second network endpoint node, another entity of the core network, and a radio access network node in communication with the first network endpoint node, a fourth message comprising fourth information indicating conformance information based on one or more results of the one or more measurements.