Method and device for improving reliabtility of paging

1. A method for improving reliability of paging, comprising:

receiving, by a first base station, a first Radio Resource Control (RRC) message sent by a terminal, wherein the first RRC message is an RRC connection resume request message or an RRC connection establishment request message, the first RRC message carries first indication information, and the first indication information is used to indicate that RRC connection resume or RRC connection establishment is used for location update;

sending, by the first base station, a third RRC message to the terminal based on the first indication information, wherein the third RRC message is used to indicate that the terminal is denied access to the first base station; and sending, to a second base station by the first base station, identification information of a target cell in which the terminal is located when the terminal sends the first RRC message, wherein when paging of the terminal is triggered, the second base station sends a paging message in a Radio Access Network (RAN)-based notification area (RNA) comprising the target cell; and

in response to that the first indication information is used to indicate that RRC connection resume or RRC connection establishment is used for RNA location update, and the first RRC message carries UE identification information of the terminal,

addressing, by the first base station, the second base station according to the UE identification information of the terminal, and sending, to the second base station by the first base station, the UE identification information of the terminal, message authentication code-integrity (MAC-I) information and the identification information of the target cell in which the terminal is located when the terminal sends the first RRC message, wherein the second base station verifies validity of the terminal according to the UE identification information of the terminal and the MAC-I information, and records the identification information of the target cell in an RNA of the terminal, and the second base station sends a paging message in the RNA comprising the target cell when paging of the terminal is triggered.

2. The method of claim 1 , further comprising: in response to that the first indication information is used to indicate that RRC connection resume or RRC connection establishment is used for Tracking Area (TA) location update, and the first RRC message carries UE identification information of the terminal,

addressing, by the first base station, the second base station according to the UE identification information of the terminal, and sending, to the second base station by the first base station, the UE identification information of the terminal, message authentication code-integrity (MAC-I) information and the identification information of the target cell in which the terminal is located when the terminal sends the first RRC message, wherein the second base station verifies validity of the terminal according to the UE identification information of the terminal and the MAC-I information, and records the identification information of the target cell in an RNA of the terminal, and when paging of the terminal is triggered, the second base station sends a paging message in the RNA comprising the target cell while the second base station sends TA information of a target TA in which the terminal is located to a first core network element, and when initiating paging, the first core network element sends a paging message in a TA list comprising the TA information of the target TA.

3. The method of claim 2 , wherein when the second base station sends the TA information of the target TA in which the terminal is located to the first core network element, the second base station also sends second indication information to the first core network element, wherein the second indication information is used to indicate to the first core network element that the terminal moves from a source TA to the target TA, and is temporarily unable to access to the first base station, and the first core network element records the TA information of the target TA in a TA list of the terminal based on the second indication information.

4. The method of claim 1 , wherein the identification information of the target cell comprises at least one of a Physical Cell Identifier (PCI), an Absolute Radio Frequency Channel Number (ARFCN), a Cell Global Identifier (CGI) and a Tracking Area Code (TAC).

5. The method of claim 1 , wherein,

the second base station and the first base station are different base stations; or,

the second base station and the first base station are a same base station, and the second base station is a base station that saves UE context information.

6. A device for improving reliability of paging, comprising:

a processor; and

a memory configured to store a software program and module;

wherein the processor is configured to run the software program and module stored in the memory to execute operations in a method for improving reliability of paging; and the method comprises:

receiving, by a first base station, a first Radio Resource Control (RRC) message sent by a terminal, wherein the first RRC message is an RRC connection resume request message or an RRC connection establishment request message, the first RRC message carries first indication information, and the first indication information is used to indicate that RRC connection resume or RRC connection establishment is used for location update;

sending, by the first base station, a third RRC message to the terminal based on the first indication information, wherein the third RRC message is used to indicate that the terminal is denied access to the first base station; and sending, to a second base station by the first base station, identification information of a target cell in which the terminal is located when the terminal sends the first RRC message, wherein when paging of the terminal is triggered, the second base station sends a paging message in a Radio Access Network (RAN)-based notification area (RNA) comprising the target cell; and

in response to that the first indication information is used to indicate that RRC connection resume or RRC connection establishment is used for RNA location update, and the first RRC message carries UE identification information of the terminal,

addressing, by the first base station, the second base station according to the UE identification information of the terminal, and sending, to the second base station by the first base station, the UE identification information of the terminal, message authentication code-integrity (MAC-I) information and the identification information of the target cell in which the terminal is located when the terminal sends the first RRC message, wherein the second base station verifies validity of the terminal according to the UE identification information of the terminal and the MAC-I information, and records the identification information of the target cell in an RNA of the terminal, and the second base station sends a paging message in the RNA comprising the target cell when paging of the terminal is triggered.

7. The device of claim 6 , wherein the method further comprises:

in response to that the first indication information is used to indicate that RRC connection resume or RRC connection establishment is used for Tracking Area (TA) location update, and the first RRC message carries UE identification information of the terminal,

addressing, by the first base station, the second base station according to the UE identification information of the terminal, and sending, to the second base station by the first base station, the UE identification information of the terminal, message authentication code-integrity (MAC-I) information and the identification information of the target cell in which the terminal is located when the terminal sends the first RRC message, wherein the second base station verifies validity of the terminal according to the UE identification information of the terminal and the MAC-I information, and records the identification information of the target cell in an RNA of the terminal, and when paging of the terminal is triggered, the second base station sends a paging message in the RNA comprising the target cell while the second base station sends TA information of a target TA in which the terminal is located to a first core network element, and when initiating paging, the first core network element sends a paging message in a TA list comprising the TA information of the target TA.

8. The device of claim 7 , wherein when the second base station sends the TA information of the target TA in which the terminal is located to the first core network element, the second base station also sends second indication information to the first core network element, wherein the second indication information is used to indicate to the first core network element that the terminal moves from a source TA to the target TA, and is temporarily unable to access to the first base station, and the first core network element records the TA information of the target TA in a TA list of the terminal based on the second indication information.

9. The device of claim 6 , wherein the identification information of the target cell comprises at least one of a Physical Cell Identifier (PCI), an Absolute Radio Frequency Channel Number (ARFCN), a Cell Global Identifier (CGI) and a Tracking Area Code (TAC).

10. The device of claim 6 , wherein,

the second base station and the first base station are different base stations; or,

the second base station and the first base station are a same base station, and the second base station is a base station that saves UE context information.