System and method for determining establishment causes for emergency sessions

A user equipment (UE), 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:
• generating, at the UE, a first request comprising an indicator that indicates a request type;
• determining, at the UE, a Radio Resource Control (RRC) establishment cause based on the request type, wherein the RRC establishment cause indicates that the UE is requesting an establishment of an RRC connection for an emergency call via a Packet Switched (PS) network;
• generating, at the UE, a request message for setting up the RRC connection, wherein the request message for setting up the RRC connection includes the RRC establishment cause;
• and
• transmitting the request message for setting up the RRC connection to a base station.

A non-transitory computer-readable medium storing instructions which, when executed, cause a computing device to perform operations comprising:

• generating, at a user equipment (UE), a first request comprising an indicator that indicates a request type;
• determining, at the UE, a Radio Resource Control (RRC) establishment cause based on the request type, wherein the RRC establishment cause indicates that the UE is requesting an establishment of an RRC connection for an emergency call via a Packet Switched (PS) network;
• generating, at the UE, a request message for setting up the RRC connection, wherein the request message for setting up the RRC connection includes the RRC establishment cause;
• and
• transmitting the request message for setting up the RRC connection to a base station.