Method and Apparatus for Session Management

An apparatus implemented at a first network function (NF), comprising:

• a processor;
• and
• a memory coupled to the processor, said memory containing instructions executable by said processor, whereby said apparatus is configured to:
• detect that a path between the first NF and a second NF is failed or the second NF is failed, wherein the second NF maintains one or more data network connections or sessions established between one or more user equipments (UEs) and one or more data networks;
• select an available second NF for the at least one of the one or more data network connections or sessions;
• send at least one address or address range of at least one UE corresponding to the at least one of the one or more data network connections or sessions and a respective priority metric of the at least one address or address range to the available second NF.

An apparatus implemented at an available second network function (NF), comprising:

• a processor;
• and
• a memory coupled to the processor, said memory containing instructions executable by said processor, whereby said apparatus is configured to:
• receive at least one address or address range of at least one user equipment (UE) corresponding to at least one of one or more data network connections or sessions and a respective priority metric of the at least one address or address range from a first NF, wherein a second NF maintains the one or more data network connections or sessions established between one or more UEs and one or more data networks;
• and
• notify the at least one address or address range and the respective priority metric to the one or more data networks.