Indicating tracking area update (tau) while in rrc inactive state

A method performed by an access network node configured to operate in a wireless communication system, the method comprising:

• receiving, from a wireless device via a cell, a Radio Resource Control (RRC) Resume Request message, wherein the RRC Resume Request message includes a cause indicator indicating mobility signaling as a cause for the wireless device resuming an RRC Connected state;
• retrieving a context for the wireless device;
• based on the context, responding to the RRC Resume Request message with an RRC Resume message;
• and
• receiving, in response to the RCC Resume message, an RRC Resume Complete message that includes or is received together with a tracking area update (TAU) message.

An access network node configured to operate in a wireless communication system, the access network node comprising:

• transceiver circuitry configured to transmit and receive signals according to a radio access technology;
• and
• processing circuitry operatively coupled to the transceiver circuitry, wherein the processing circuitry and the transceiver circuitry are configured to:
• receive, from a wireless device via a cell, a Radio Resource Control (RRC) Resume Request message, wherein the RRC Resume Request message includes a cause indicator indicating mobility signaling as a cause for the wireless device resuming an RRC Connected state;
• retrieve a context for the wireless device, wherein the context includes a tracking area identifier (TAI) list for the wireless device;
• determine whether a tracking area code (TAC) of the cell is represented in the TAI list;
• and
• when it is determined that the TAC is not represented in the TAI list, respond to the RRC Resume Request message with an RRC Resume message.

An access network node configured to operate in a wireless communication system, the access network node comprising:

• transceiver circuitry configured to transmit and receive signals according to a radio access technology;
• and
• processing circuitry operatively coupled to the transceiver circuitry, wherein the processing circuitry and the transceiver circuitry are configured to:
• receive, from a wireless device via a cell, a Radio Resource Control (RRC) Resume Request message, wherein the RRC Resume Request message includes a cause indicator indicating mobility signaling as a cause for the wireless device resuming an RRC Connected state;
• retrieve a context for the wireless device;
• based on the context, respond to the RRC Resume Request message with an RRC Resume message;
• and
• receive, in response to the RCC Resume message, an RRC Resume Complete message that includes or is received together with a tracking area update (TAU) message.