Relocating an access gateway

An apparatus comprising:

• a processor;
• and that
• a memory coupled to the processor, the processor configured to cause the apparatus to:
• receive a first request from a Trusted Non-3GPP Gateway Function (2TNGF2), the first request containing a remote unit identity and an AMF identity, wherein the first TNGF initiated registration of the remote unit with the mobile communication network;
• select selects an AMF in the mobile communication network using the AMF identity;
• send a relocation notify message to the AMF, the relocation notify message containing the remote unit identity, wherein the relocation notify message indicates that the registration of the remote unit with the mobile communication network is to be resumed via the apparatus;
• receive a second request from the AMF containing a security key in response to sending the relocation notify message;
• send sends a first response to the TNGF;
• and
• establish secure connectivity with the remote unit by applying the security key.

An apparatus in a mobile communication network comprising:

• a processor;
• and
• a memory coupled to the processor, the processor configured to cause the apparatus to:
• receive a first request from a first access gateway, the first request including a first NAS message from a remote unit, the first NAS message initiating registration of the remote unit with the mobile communication network via the first access gateway;
• determine to relocate the registration of the remote unit to a second access gateway, wherein the second access gateway is to resume registration of the remote unit;
• send a relocation command to the first access gateway, the relocation command including an address of the second access gateway;
• and
• relocate the registration of the remote unit to the second access gateway in response to sending the relocation command.