Session establishment, maintenance, and termination by end device based on SMS messaging

An end device comprising:

• a communication interface;
• a memory, wherein the memory stores instructions;
• and
• a processor, wherein the processor executes the instructions to:
• generate a first Short Message Service (SMS) message, which includes a first Session Initiation Protocol (SIP) message configured to initiate or end a media session that is supported by a control channel and a media channel;
• transmit, via the communication interface in response to the generation, the first SMS message that includes the first SIP message to a server via a mobility management entity and using non-access stratum as the control channel;
• establish, via the communication interface subsequent to the transmission, an end-to-end connection for the media session using a bearer, via a packet data network gateway (PGW), as the media channel when the first SIP message is configured to initiate the media session;
• and
• end, via the communication interface subsequent to the transmission, the media session when the first SIP message is configured to end the media session.

A non-transitory computer-readable storage medium storing instructions executable by a processor of a device, which when executed cause the device to:

• generate a first Short Message Service (SMS) message, which includes a first Session Initiation Protocol (SIP) message configured to initiate or end a media session that is supported by a control channel and a media channel;
• transmit, via non-access stratum as the control channel in response to the generation, the first SMS message that includes the first SIP message to a server via a mobility management entity;
• establish, subsequent to the transmission, an end-to-end connection for the media session using a bearer, via a packet data network gateway (PGW), as the media channel when the first SIP message is configured to initiate the media session;
• and
• end, subsequent to the transmission, the media session, when the first SIP message is configured to end the media session.