User plane function discovery

A method performed by a network repository function (NRF), the method comprising:

• receiving, from a first user plane function (UPF) a registration request comprising first UPF information for the first UPF, the first UPF information comprising address range information specifying internet protocol (IP) addresses that can be served by the first UPF;
• and
• storing the first UPF information, wherein the address range information comprises:
• first address range information specifying a range of public network address translated (NATed) IP addresses that can be served by the first UPF,
• second address range information specifying a range of private PDU Session IP addresses that can be served by the first UPF, and
• third address range information specifying a range of public UE PDU Session IP address that can be served by the first UPF.

A network node, wherein the network node implements a user plane function (UPF) and is configured to perform a method comprising:

• sending to a network repository function (NRF) a registration request comprising UPF information for the UPF, the UPF information comprising address range information specifying internet protocol (IP) addresses that can be served by the UPF, wherein the address range information comprises:
• first address range information specifying a range of public network address translated (NATed) IP addresses that can be served by the UPF,
• second address range information specifying a range of private PDU Session IP addresses that can be served by the UPF, and
• third address range information specifying a range of public UE PDU Session IP address that can be served by the UPF.

A network node, wherein the network node is configured to perform a method comprising:

• receiving, from a first user plane function (UPF) a registration request comprising first UPF information for the first UPF, the first UPF information comprising address range information specifying internet protocol (IP) addresses that can be served by the first UPF;
• and
• storing the first UPF information, wherein the address range information comprises:
• first address range information specifying a range of public network address translated (NATed) IP addresses that can be served by the first UPF,
• second address range information specifying a range of private PDU Session IP addresses that can be served by the first UPF, and
• third address range information specifying a range of public UE PDU Session IP address that can be served by the first UPF.