Methods supporting a capability to modify session traffic in response to a handover and related network nodes

A method of operating a session management function, SMF, node of a core network, CN, for a communication network, the method comprising:

• receiving an association message from a user plane function, UPF, node of the CN, wherein the association message includes an indication that the UPF node supports a capability to modify session traffic in response to a handover;
• receiving a protocol data unit, PDU, session create request message requesting creation of a PDU session for a communication device;
• transmitting a policy control create request message responsive to receiving the PDU session create request message requesting creation of the PDU session for the communication device;
• receiving a policy control create response message after transmitting the policy control create request message, wherein the policy control create response message is in response to the policy control create request message, and wherein the policy control create response message includes an indication that session traffic of the PDU session for the communication device is to be modified in response to handover;
• selecting the UPF node to handle the PDU session for the communication device responsive to the indication that the UPF node supports the capability to modify session traffic in response to handover and responsive to the indication that session traffic of the PDU session for the communication device is to be modified in response to handover;
• and
• transmitting a session establishment request message to the UPF node responsive to selecting the UPF node to handle the PDU session for the communication device, wherein the session establishment request message includes an indication to modify session traffic of the PDU session for the communication device in response to handover.