Methods for access network exposure on core network service bus

A network node comprising:

• a processor configured to receive a first message including an identifier associated with a radio access network (RAN) node;
• the processor configured to send a second message to a second network node, the second message including the identifier associated with the RAN node;
• the processor configured to receive a third message from the second network node, the third message including non-access stratum (NAS) key information associated with one or more wireless transmit/receive units (WTRUs);
• the processor configured to receive a fourth message from a requesting WTRU, the fourth message including an encrypted NAS payload;
• the processor configured to decrypt the encrypted NAS payload using security context information to obtain content of the fourth message, wherein the security context information is determined based on at least a portion of the NAS key information;
• the processor configured to determine a destination network function endpoint based on content of the fourth message;
• the processor configured to generate a fifth message based on the content of the fourth message;
• the processor configured to second the fifth message to the determined destination network function endpoint;
• and
• the processor configured to receive a sixth message from the determined network function in response to the fifth message.