First node, second node, third node, and methods performed thereby, for handling data traffic

A first node for handling data traffic, the first node being configured to operate in a communications network, the first node being further configured to:

• receive an indication from a second node configured to operate in the communications network, the indication being configured to indicate, for a packet forwarding control protocol, PFCP, session, at least one of:
• i. a first rule for packet detection;
• and
• ii. a second rule of enforcement of quality of service;
• initiate a process of optimization, based on reinforcement learning, of a procedure to control data traffic in the communications network, the process of optimization being further configured to be based on the indication configured to be received;
• send a first indication to a second node configured to operate in the communications network, the first indication being configured to indicate that the first node is configured to support the process of optimization of the procedure to control data traffic based on reinforcement learning;
• and
• receive a second indication from the second node, the second indication being configured to indicate that the second node supports the process of optimization of the procedure to control data traffic based on reinforcement learning.