Method for accessing a service unavailable through a network cell

An access device, comprising:

• at least one hardware processor;
• and
• a non-transitory computer-readable storage medium coupled to the at least one hardware processor and storing programming instructions for execution by the at least one hardware processor, wherein the programming instructions, when executed, cause the at least one hardware processor to perform operations comprising:
• receiving, at the access device and from a user equipment (UE), a Radio Resource Control (RRC) connection setup complete message, wherein the RRC connection setup complete message includes a Non-Access Stratum (NAS) extended service request;
• in response to the RRC connection setup complete message, forwarding the NAS extended service request to a Mobility Management Entity (MME);
• and
• receiving, at the access device and from the MME, a S1 context setup message, wherein the S1 context setup message identifies a location area that the UE is registered in.

A Mobility Management Entity (MME), comprising:

• at least one hardware processor;
• and
• a non-transitory computer-readable storage medium coupled to the at least one hardware processor and storing programming instructions for execution by the at least one hardware processor, wherein the programming instructions, when executed, cause the at least one hardware processor to perform operations comprising:
• receiving, at the MME and from an access device, a Non-Access Stratum (NAS) extended service request for a user equipment (UE);
• and
• sending, from the MME and to the access device, a S1 context setup message, wherein the S1 context setup message identifies a location area that the UE is registered in.

A method, comprising:

• receiving, at an access device and from a user equipment (UE), a Radio Resource Control (RRC) connection setup complete message, wherein the RRC connection setup complete message includes a Non-Access Stratum (NAS) extended service request;
• in response to the RRC connection setup complete message, forwarding the NAS extended service request to a Mobility Management Entity (MME);
• and
• receiving, at the access device and from the MME, a S1 context setup message, wherein the S1 context setup message identifies a location area that the UE is registered in.