Radio Access Network Notification Area Update Failure

Patent metadata

Field	Value
Publication number	US-2018270895-A1
Application number	US-201815925584-A
Country	US
Kind code	A1
Filing date	Mar 19, 2018
Priority date	Mar 17, 2017
Publication date	Sep 20, 2018
Grant date	—

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.

First claim

What is claimed is:

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.

Assignees

• Ofinno Technologies Llc

Inventors

• Park Kyungmin
• Dinan Esmael

Classifications

• H04W24/04

  Arrangements for maintaining operational condition · CPC title

• H04W8/18

  Processing of user or subscriber data, e.g. subscribed services, user preferences or user profiles; Transfer of user or subscriber data · CPC title

• H04W60/00

  Affiliation to network, e.g. registration; Terminating affiliation with the network, e.g. de-registration · CPC title

• H04W68/00 Primary

  User notification, e.g. alerting and paging, for incoming communication, change of service or the like · CPC title

• H04W8/005

  Discovery of network devices, e.g. terminals · CPC title