Methods, apparatus, and systems for discovery of edge network management servers

A method, performed by a wireless transmit/receive unit (WTRU), for discovery of an available Edge Data Network Configuration Server (ECS) associated with an Edge Enabler Server (EES), the method comprising:

• sending a Packet Data Network (PDN) session establishment request message to a core network entity, wherein the PDN session establishment request message comprises a first Protocol Configuration Option (PCO), and wherein the first PCO indicates a request for discovery of one or more ECSs;
• receiving a protocol data unit (PDU) session establishment accept message from the core network entity in response to the PDN session establishment request message, wherein the PDU session establishment accept message comprises a second PCO, and wherein the second PCO comprises ECS information;
• and
• performing communications with one or more ECSs.

A method, performed by a session management function (SMF), for enabling discovery of an available Edge Data Network Configuration Server (ECS) associated with an Edge Enabler Server (EES), the method comprising:

• receiving a Packet Data Network (PDN) session establishment request message from a wireless transmit/receive unit (WTRU), wherein the PDN session establishment request message comprises a first Protocol Configuration Option (PCO), and wherein the first PCO indicates a request for discovery of one or more ECSs;
• determining ECS information based on the PDN session establishment request message;
• and
• sending a protocol data unit (PDU) session establishment accept message to the WTRU in response to the PDN session establishment request message, wherein the PDU session establishment accept message comprises a second PCO, and wherein the second PCO comprises ECS information.

A wireless transmit/receive unit (WTRU) comprising:

• a processor and memory, wherein the processor and memory are configured to:
• send a Packet Data Network (PDN) session establishment request message to a core network entity, wherein the PDN session establishment request message comprises a first Protocol Configuration Option (PCO), and wherein the first PCO indicates a request for discovery of one or more Edge Data Network Configuration Servers (ECSs);
• receive a protocol data unit (PDU) session establishment accept message from the core network entity in response to the PDN session establishment request message, wherein the PDU session establishment accept message comprises a second PCO, and wherein the second PCO comprises ECS information;
• and
• perform communications with one or more ECSs.