Radio Access Network Notification Area Update Failure

• US 20180270895A1
• Filed: 03/19/2018
• Published: 09/20/2018
• Est. Priority Date: 03/17/2017
• Status: Active Grant

• Current Assignee: Samsung Electronics Co. Ltd.
• Original Assignee: Ofinno Technologies, LLC
• Inventors: Park, Kyungmin, Dinan, Esmael
• Granted Patent: US 10,582,560 B2
• Time in Patent Office: Days
• CPC Class Codes: H04W 24/04 Arrangements for maintaining operational condition
• CPC Class Codes: H04W 60/00 Affiliation to network, e.g. registration; Terminating affiliation with the network, e.g. de-registration
• CPC Class Codes: H04W 68/00 User notification, e.g. alerting and paging, for incoming communication, change of service or the like
• CPC Class Codes: H04W 76/27 Transitions between radio resource control [RRC] states
• CPC Class Codes: H04W 76/38 triggered by timers
• CPC Class Codes: H04W 8/005 Discovery of network devices, e.g. terminals
• CPC Class Codes: H04W 8/18 Processing of user or subscriber data, e.g. subscribed services, user preferences or user profiles; Transfer of user or subscriber data

Abstract

A base station transmits to a wireless device, first message(s) indicating an RRC state transition of the wireless device from an RRC connected state to an RRC inactive state. The first message(s) comprise a parameter indicating a value associated with a wireless device RAN notification area update timer for a periodic RAN notification area update procedure. The base station receives a second message indicating a RAN notification area update in response to expiry of the wireless device RAN notification area update timer. The base station starts a network RAN notification area update timer in response to the receiving of the second message. The base station transmits to a core network entity and in response to an expiration of the network RAN notification area update timer, a third message indicating a wireless device context release request for the wireless device. The third message comprises an identifier of the wireless device.

Claims

1. A method comprising:

transmitting, by a first base station to a wireless device, at least one 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 at least one first message comprises a parameter indicating a value associated with a wireless device radio access network (RAN) notification area update timer for a periodic RAN notification area update procedure;

receiving, by the first base station, a second message indicating a RAN notification area update by the wireless device in response to expiry of the wireless device RAN notification area update timer;

starting, by the first base station, a network RAN notification area update timer in response to the receiving of the second message; and

transmitting, by the first base station to a core network entity and in response to an expiration of the network RAN notification area update timer, a third message indicating a wireless device context release request for the wireless device, wherein the third message comprises an identifier of the wireless device.

2. The method of claim 1, wherein the at least one first message further comprises a RAN notification area information associated with the wireless device, the RAN notification area information comprising at least one of:

a RAN area identifier;

or

a cell identifier.

3. The method of claim 1, further comprising releasing, by the first base station, a wireless device context of the wireless device based on the expiration of the network RAN notification area update timer.

4. The method of claim 1, wherein the third message further indicates that the wireless device fails in a period RAN notification area update.

5. The method of claim 1, wherein the core network entity determines the wireless device as being in an idle state in response to receiving the third message.

6. The method of claim 1, wherein the first 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.

7. The method of claim 1, wherein the wireless device RAN notification area update timer is configured based on at least one of:

a moving speed of the wireless device;

a wireless device type of the wireless device;

a network slice of the wireless device;

or

a bearer of the wireless device.

8. The method of claim 1, further comprising:

transmitting, by the core network entity to a second base station, a paging message for the wireless device based on the third message; and

receiving, by the core network entity from the second base station, a response message to the paging message.

9. The method of claim 1, wherein the wireless device transitions a RRC state from the RRC inactive state to a RRC idle state in response to failing in a period RAN notification area update.

10. The method of claim 1, wherein the second message comprises an RRC connection resume request message.

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, at least one 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 at least one first message comprises a parameter indicating a value associated with a wireless device radio access network (RAN) notification area update timer for a periodic RAN notification area update procedure;

receive a second message indicating a RAN notification area update by the wireless device in response to expiry of the wireless device RAN notification area update timer;

start a network RAN notification area update timer in response to the receiving of the second message; and

transmit, to a core network entity and in response to an expiration of the network RAN notification area update timer, a third message indicating a wireless device context release request for the wireless device, wherein the third message comprises an identifier of the wireless device.

12. The base station of claim 11, wherein the at least one first message further comprises a RAN notification area information associated with the wireless device, the RAN notification area information comprising at least one of:

a RAN area identifier;

or

a cell identifier.

13. 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 expiration of the network RAN notification area update timer.

14. The base station of claim 11, wherein the third message further indicates that the wireless device fails in a period RAN notification area update.

15. The base station of claim 11, wherein the core network entity determines the wireless device as being in an idle state in response to receiving the third message.

16. The base station of claim 11, wherein the instructions, when executed by the one or more processors, further cause the base station to keep 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.

17. The base station of claim 11, wherein the wireless device RAN notification area update timer is configured based on at least one of:

a moving speed of the wireless device;

a wireless device type of the wireless device;

a network slice of the wireless device;

or

a bearer of the wireless device.

18. The base station of claim 11, wherein the core network entity further:

transmit, to a second base station, a paging message for the wireless device based on the third message; and

receive, from the second base station, a response message to the paging message.

19. The base station of claim 11, wherein the wireless device transitions a RRC state from the RRC inactive state to a RRC idle state in response to failing in a period RAN notification area update.

20. The base station of claim 11, wherein the second message comprises an RRC connection resume request message.