Communication method, apparatus, and system

Patent metadata

Field	Value
Publication number	US-12550033-B2
Application number	US-202217990483-A
Country	US
Kind code	B2
Filing date	Nov 18, 2022
Priority date	May 21, 2020
Publication date	Feb 10, 2026
Grant date	Feb 10, 2026

Abstract

Embodiments of this application provide a communication method, an apparatus, and a system. In one example method, after determining that a connection failure occurs, a terminal device records and sends a first report. The first report includes cell information of a first logical cell, or the first report includes a PLMN identifier of a first logical cell and cell information of a second logical cell. The first logical cell includes at least one of a source logical cell or a failed logical cell in which the connection failure occurs. The second logical cell includes at least one of a first logical cell that shares a same physical cell with the source logical cell or a first logical cell that shares a same physical cell with the failed logical cell.

First claim

What is claimed is:

1 . A communication method, wherein the method comprises:
determining that a connection failure occurs; in response to determining that the connection failure occurs, recording a first report, wherein the first report comprises a public land mobile network (PLMN) identifier of a failed logical cell and cell information of a second logical cell, wherein the failed logical cell is a cell in which the connection failure occurs, the second logical cell is a cell that has a different PLMN than the failed logical cell and that the failed logical cell; and sending the first report to a third access network device that is different from a first access network device associated with a source logical cell and that is different from a second access network device associated with the failed logical cell.

2 . The method according to claim 1 , wherein the cell information comprises a PLMN identifier and cell identifier information, and the cell identifier information identifies a cell.

3 . The method according to claim 1 , wherein the source logical cell is a logical cell in which a terminal device is located when the terminal device last receives a handover command.

4 . The method according to claim 1 , wherein the connection failure is a radio link failure (RLF), and the failed logical cell is a logical cell in which the RLF is detected.

5 . The method according to claim 1 , wherein the connection failure is a handover failure (HOF), and the failed logical cell is a target logical cell in which the HOF occurs.

6 . The method according to claim 1 , wherein the first report further comprises cell identifier information of the failed logical cell.

7 . The method according to claim 1 , wherein the first report comprises a PLMN identifier of the source logical cell, the method further comprises:
receiving first indication information, wherein the first indication information indicates a terminal device to record cell information or the PLMN identifier of the source logical cell; and the recording a first report comprises: recording the first report based on the first indication information.

8 . The method according to claim 1 , wherein the method further comprises:
receiving second indication information, wherein the second indication information indicates a terminal device to record cell information or the PLMN identifier of the failed logical cell; and the recording a first report comprises: recording the first report based on the second indication information.

9 . A communication method, wherein the method comprises:
receiving, at a third access network device that is different from a first access network device associated with a source logical cell and that is different from a second access network device associated with a failed logical cell, a first report, wherein the first report comprises a public land mobile network (PLMN) identifier of the failed logical cell and cell information of a second logical cell, wherein the failed logical cell is a cell in which a connection failure occurs, the second logical cell is a cell that has a different PLMN than the failed logical cell and that shares a same physical cell with the failed logical cell; and processing the first report.

10 . The method according to claim 9 , wherein the cell information comprises a PLMN identifier and cell identifier information, and the cell identifier information identifies a cell.

11 . The method according to claim 9 , wherein the source logical cell is a logical cell in which a terminal device is located when the terminal device last receives a handover command.

12 . The method according to claim 9 , wherein the connection failure is a radio link failure (RLF), and the failed logical cell is a logical cell in which the RLF is detected.

13 . The method according to claim 9 , wherein the connection failure is a handover failure (HOF), and the failed logical cell is a target logical cell in which the HOF occurs.

14 . The method according to claim 9 , wherein the method comprises:
obtaining indication information, wherein the indication information comprises at least one of first indication information or second indication information, the first indication information indicates a terminal device to record cell information or a the PLMN identifier of the source logical cell when the connection failure occurs, and the second indication information indicates the terminal device to record cell information or the PLMN identifier of the failed logical cell in which the connection failure occurs; and sending the indication information.

15 . The method according to claim 14 , wherein when the indication information comprises the second indication information, and the indication information is obtained by the first access network device, the obtaining indication information comprises:
receiving the second indication information from the second access network device.

16 . A communication apparatus, comprising:
at least one processor; and one or more memories coupled to the at least one processor and storing programming instructions for execution by the at least one processor to cause the apparatus to: determine that a connection failure occurs; in response to determining that the connection failure occurs, record a first report, wherein the first report comprises a public land mobile network (PLMN) identifier of a failed logical cell and cell information of a second logical cell, wherein the failed logical cell is a cell in which the connection failure occurs, the second logical cell is a cell that has a different PLMN than the failed logical cell and that shares a same physical cell with the failed logical cell; and send the first report to a third access network device that is different from a first access network device associated with a source logical cell and that is different from a second access network device associated with the failed logical cell.

17 . The apparatus according to claim 16 , wherein the cell information comprises a PLMN identifier and cell identifier information, and the cell identifier information identifies a cell.

18 . The apparatus according to claim 16 , wherein the source logical cell is a logical cell in which a terminal device is located when the terminal device last receives a handover command.

19 . The apparatus according to claim 16 , wherein the first report comprises a PLMN identifier of the source logical cell, the programming instructions, when executed by the at least one processor, cause the apparatus to:
receive first indication information, wherein the first indication information indicates a terminal device to record cell information or a PLMN identifier of the source logical cell; and record the first report based on the first indication information.

20 . The apparatus according to claim 16 , wherein the programming instructions, when executed by the at least one processor, cause the apparatus to:
receive second indication information, wherein the second indication information indicates a terminal device to record cell information or the PLMN identifier of the failed logical cell; and record the first report based on the second indication information.

Assignees

• Huawei Tech Co Ltd

Inventors

• Geng Tingting
• Olofsson Henrik
• Yan Le

Classifications

• H04W36/0064

  of control information between different access points · CPC title

• H04W84/042

  Public Land Mobile systems, e.g. cellular systems · CPC title

• H04W36/0061

  of neighbour cell information · CPC title

• H04W36/0083

  Determination of parameters used for hand-off, e.g. generation or modification of neighbour cell lists · CPC title

• H04W36/305 Primary

  Handover due to radio link failure (control signalling for hand-off failure H04W36/0079) · CPC title