Context release based on expiry of a network radio access network notification area update timer
A base station transmits to a wireless device, a first message indicating a RRC state transition of the wireless device from an RRC connected state to an RRC inactive state. The first message indicates a value associated with a wireless device radio-access-network notification area (RNA) update timer for a periodic RNA update procedure. The base station receives an RNA update from the wireless device in response to expiry of the wireless device RNA update timer. A determination is made that the periodic RNA update is unsuccessful based on expiry of a network RNA update timer. A second message is transmitted by the base station to an AMF in response to the determination. The second message indicates a wireless device context release request for the wireless device. The second message comprises an identifier of the wireless device.
1. A method comprising:
transmitting, by a base station to a wireless device, a first message indicating a radio resource control (RRC) state transition of the wireless device from an RRC connected state to an RRC inactive state, wherein the first message indicates a value associated with a wireless device radio-access-network notification area (RNA) update timer for a periodic RNA update procedure;
receiving, by the base station from the wireless device, an RNA update in response to expiry of the wireless device RNA update timer;
determining that the periodic RNA update is unsuccessful based on expiry of a network RNA update timer; and
transmitting, by the base station to an access and mobility management function (AMF) and in response to the determination, a second message indicating a wireless device context release request for the wireless device, wherein the second message comprises an identifier of the wireless device.
2. The method of claim 1 , wherein the base station starts the network RNA update timer in response to transmitting one or more packets to the wireless device.
3. The method of claim 1 , wherein the first message comprises an RNA information associated with the wireless device, the RNA information comprising at least one of:
a RAN area identifier; or
a cell identifier.
4. The method of claim 1 , further comprising releasing, by the base station, a wireless device context of the wireless device based on the expiry of the network RNA update timer.
5. The method of claim 1 , wherein the second message indicates that the wireless device fails in the periodic RNA update.
6. The method of claim 1 , wherein the AMF determines the wireless device as being in an idle state based on receiving the second message.
7. The method of claim 1 , wherein the base station keeps a wireless device context of the wireless device at least during a time in which the wireless device is in the RRC inactive state, the wireless device context comprising at least one of:
a bearer configuration information;
a logical channel configuration information;
a packet data convergence protocol configuration information; or
a security information.
8. The method of claim 1 , wherein the value associated with the wireless device RNA update timer is based on at least one of:
a moving speed of the wireless device;
a device type of the wireless device;
a network slice of the wireless device; or
a bearer of the wireless device.
9. The method of claim 1 , wherein the AMF:
transmits, to a second base station, a paging message for the wireless device based on the second message; and
receives, from the second base station, a response message to the paging message.
10. The method of claim 1 , wherein the wireless device transitions an RRC state from the RRC inactive state to an RRC idle state based on failing in the periodic RNA update.
11. A base station comprising:
one or more processors; and
memory storing instructions that, when executed by the one or more processors, cause the base station to:
transmit, to a wireless device, a first message indicating a radio resource control (RRC) state transition of the wireless device from an RRC connected state to an RRC inactive state, wherein the first message indicates a value associated with a wireless device radio-access-network notification area (RNA) update timer for a periodic RNA update procedure;
receive, from the wireless device, an RNA update in response to expiry of the wireless device RNA update timer;
determine that the periodic RNA update is unsuccessful based on expiry of a network RNA update timer; and
transmit, to an access and mobility management function (AMF) and in response to the determination, a second message indicating a wireless device context release request for the wireless device, wherein the second message comprises an identifier of the wireless device.
12. The base station of claim 11 , wherein the base station starts the network RNA update timer in response to transmitting one or more packets to the wireless device.
13. The base station of claim 11 , wherein the first message comprises an RNA information associated with the wireless device, the RNA information comprising at least one of:
a RAN area identifier; or
a cell identifier.
14. The base station of claim 11 , wherein the instructions, when executed by the one or more processors, further cause the base station to release a wireless device context of the wireless device based on the expiry of the network RNA update timer.
15. The base station of claim 11 , wherein the second message indicates that the wireless device fails in the periodic RNA update.
16. The base station of claim 11 , wherein the AMF determines the wireless device as being in an idle state based on receiving the second message.
17. The base station of claim 11 , wherein the base station keeps a wireless device context of the wireless device at least during a time in which the wireless device is in the RRC inactive state, the wireless device context comprising at least one of:
a bearer configuration information;
a logical channel configuration information;
a packet data convergence protocol configuration information; or
a security information.
18. The base station of claim 11 , wherein the value associated with the wireless device RNA update timer is based on at least one of:
a moving speed of the wireless device;
a device type of the wireless device;
a network slice of the wireless device; or
a bearer of the wireless device.
19. The base station of claim 11 , wherein the AMF:
transmits, to a second base station, a paging message for the wireless device based on the second message; and
receives, from the second base station, a response message to the paging message.
20. A system comprising:
a wireless device;
a first base station; and
an access and mobility management function (AMF); and
wherein:
the first base station is configured to:
transmit, to the wireless device, a first message indicating a radio resource control (RRC) state transition of the wireless device from an RRC connected state to an RRC inactive state, wherein the first message indicates a value associated with a wireless device radio-access-network notification area (RNA) update timer for a periodic RNA update procedure;
receive, from the wireless device, an RNA update in response to expiry of the wireless device RNA update timer;
determine that the periodic RNA update is unsuccessful based on expiry of a network RNA update timer; and
transmit to the AMF and in response to the determination, a second message indicating a wireless device context release request for the wireless device, wherein the second message comprises an identifier of the wireless device; and
wherein the AMF is configured to:
transmit, to a second base station, a paging message for the wireless device based on the second message; and
receive, from the second base station, a response message to the paging message.