Method for enabling terminal access to cell, terminal and computer storage medium

• US 10,517,022 B2
• Filed: 11/09/2017
• Issued: 12/24/2019
• Est. Priority Date: 02/03/2017
• Status: Active Grant

• Current Assignee: Guangdong OPPO Mobile Telecommunications Corporation Limited
• Original Assignee: Guangdong OPPO Mobile Telecommunications Corporation Limited
• Inventors: Wang, Xukang
• Primary Examiner(s): Hsu, Alpus
• Application Number:
  US15/807,822
• Publication Number:
  US 20180227810A1
• Time in Patent Office: 775 Days
• CPC Class Codes: H04W 36/0022 for transferring data sessions between adjacent core network technologies
• CPC Class Codes: H04W 36/0055 Transmission or use of information for re-establishing the radio link
• CPC Class Codes: H04W 36/0061 of neighbour cell information
• CPC Class Codes: H04W 36/14 Reselecting a network or an air interface
• CPC Class Codes: H04W 48/02 Access restriction performed under specific conditions
• CPC Class Codes: H04W 48/10 using broadcasted information
• CPC Class Codes: H04W 48/16 Discovering, processing access restriction or access information
• 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 8/12 between location registers or mobility servers
• CPC Class Codes: H04W 8/16 selectively restricting mobility data tracking

Abstract

Disclosed are a method for enabling a terminal access to a cell, a terminal and a storage medium. The method includes: when performing a Circuit Switched Domain Fallback (CSFB) service, a terminal sends a location update request to a base station of a first cell; when receiving a location update reject message, which is returned by the base station of the first cell in response to the location update request, and determining that a reason for reject is Location Area Not Allowed according to the location update reject message, the terminal puts a Location Area Identification (LAI) of the first cell into a forbidden location areas (LAs) for roaming list; and in response to putting the LAI of the first cell into the forbidden LAs for roaming list, the terminal searches one or more second cells except the first cell and performs an access operation.

Claims

1. A method for enabling a terminal access to a cell, comprising:

when performing a Circuit Switched Domain Fallback (CSFB) service, sending, by a terminal, a location update request to a base station of a first cell;

when the terminal receives a location update reject message, which is returned by the base station of the first cell in response to the location update request, and the terminal determines that a reason for reject is Location Area Not Allowed according to the location update reject message, putting a Location Area Identification (LAI) of the first cell into a forbidden location areas (LAs) for roaming list, and setting a time period during which the first cell is held in the forbidden LAs for roaming list; and

in response to putting the LAI of the first cell into the forbidden LAs for roaming list, searching, by the terminal, one or more second cells except the first cell, and performing an access operation within the time period.

2. The method according to claim 1, further comprising:

after the time period, deleting, by the terminal, the first cell from the forbidden LAs for roaming list.

3. The method according to claim 1, further comprising:

carrying, by the terminal, the LAI of the first cell in a broadcast message for broadcasting, the broadcast message comprising an indication identifier for indicating that the LAI of the first cell is held in the forbidden LAs for roaming list.

4. The method according to claim 3, wherein

carrying, by the terminal, the indication identifier in a field of a head of the broadcast message.

5. A terminal, comprising:

a processor; and

a memory, configured to store instructions that are executable by the processor, wherein

the processor is configured to;

send, when performing a Circuit Switched Domain Fallback (CSFB) service, a location update request to a base station of a first cell;

receive a location update reject message, which is returned by the base station of the first cell in response to the location update request;

put, when determining that a reason for reject is Location Area Not Allowed according to the location update reject message, a Location Area Identification (LAI) of the first cell into a forbidden location areas (LAs) for roaming list, and set a time period during which the first cell is held in the forbidden LAs for roaming list; and

search, in response to putting the LAI of the first cell into the forbidden LAs for roaming list, one or more second cells except the first cell, and perform an access operation within the time period.

6. The terminal according to claim 5, wherein the processor is further configured to:

delete, after the time period, the first cell from the forbidden LAs for roaming list.

7. The terminal according to claim 5, wherein the processor is further configured to:

carry the LAI of the first cell in a broadcast message for broadcasting, the broadcast message comprising an indication identifier for indicating that the LAI of the first cell is held in the forbidden LAs for roaming list.

8. The terminal according to claim 7, wherein the processor is further configured to:

carry the indication identifier in a field of a head of the broadcast message.

9. A non-transitory computer-readable storage medium having stored thereon instructions that, when executed by a processor, cause the processor to execute a method for enabling a terminal access to a cell, the method comprising:

when performing a Circuit Switched Domain Fallback (CSFB) service, sending, by a terminal, a location update request to a base station of a first cell;

when the terminal receives a location update reject message, which is returned by the base station of the first cell in response to the location update request, and the terminal determines that a reason for reject is Location Area Not Allowed according to the location update reject message, putting a Location Area Identification (LAI) of the first cell into a forbidden location areas (LAs) for roaming list, and setting a time period during which the first cell is held in the forbidden LAs for roaming list; and

in response to putting the LAI of the first cell into the forbidden LAs for roaming list, searching, by the terminal, one or more second cells except the first cell, and performing an access operation within the time period.

10. The non-transitory computer-readable storage medium according to claim 9, wherein the method further comprises:

after the time period, deleting, by the terminal, the first cell from the forbidden LAs for roaming list.

11. The non-transitory computer-readable storage medium according to claim 9, wherein the method further comprises:

carrying, by the terminal, the LAI of the first cell in a broadcast message for broadcasting, the broadcast message comprising an indication identifier for indicating that the LAI of the first cell is held in the forbidden LAs for roaming list.

12. The non-transitory computer-readable storage medium according to claim 11, wherein the method further comprises:

carrying, by the terminal, the indication identifier in a field of a head of the broadcast message.