Communication method, device and system

Abstract

The invention provides a communication method, device and system, which can be applied to an LTM scene. In the method, under the condition that the connection failure occurs, the terminal equipment records the reason of the connection failure and the related information of the mobility process and reports the information to the network equipment, so that the network equipment can conveniently optimize related parameters, and the interruption time delay caused by the connection failure can be reduced.

Claims

1. A communication method, characterized in that, it includes: receiving a first piece of information, where the first piece of information instructs a terminal device to switch from a source cell to a target cell, the target cell belongs to at least one candidate cell, the configuration information of the target cell belongs to the configuration information of the at least one candidate cell received by the terminal device, and the first piece of information is sent via a media access control control element; recording a first report, where the first report is used to indicate the reason for connection failure during the mobility process of layer 1 or layer 2 of the terminal device; sending the first report.

2. The method according to claim 1, characterized in that, the first report further indicates information of a first candidate cell, and the information of the first candidate cell includes at least one of the identification information of the first candidate cell, whether the first candidate cell is configured with a random access response (RAR), or the layer 1 reporting configuration information corresponding to the first candidate cell, and the first candidate cell is one or more of the at least one candidate cell.

3. The method according to claim 1 or 2, characterized in that, the first report further indicates early timing advance information, and the early timing advance information includes at least one of whether the terminal device performs early timing advance in the target cell, the candidate cell for performing the early timing advance, the number of physical downlink control link commands indicating to perform the early timing advance to the candidate cell, physical random access channel resource information, synchronization signal block beam identification, or preamble identification.

4. The method according to any one of claims 1 to 3, characterized in that, the connection failure includes a radio link failure of the source cell, and the reasons for the radio link failure include at least one of the following: the running duration of a first timer is greater than or equal to a first threshold value, where the running duration of the first timer is the duration from when the terminal device detects a physical layer out-of-sync problem with the source network device to when the terminal device receives the first piece of information; the running duration of a second timer is greater than or equal to a second threshold value, where the running duration of the second timer is, during the running of the first timer, the duration from when the terminal device triggers the sending of a measurement report to when the terminal device receives the first piece of information.

5. The method according to claim 4, characterized in that, the reasons for the radio link failure further include at least one of random access failure, beam failure recovery failure, listen-before-talk failure, and the number of radio link control protocol retransmissions being greater than or equal to a fifth threshold value.

6. The method according to claim 4 or 5, characterized in that, the first report further indicates the source cell radio link failure information, and the source cell radio link failure information includes at least one of the layer 1 measurement results or layer 3 measurement results available at the time of detection failure, the connection failure type being radio link failure, the cell with the radio link failure being the source cell, or the duration from when the terminal device receives the configuration information of the at least one candidate cell to when the terminal device detects the radio link failure of the source cell.

7. The method according to any one of claims 1 to 3, wherein, the connection failure includes a handover failure of the terminal device or a handover failure within a first period after successful handover, and the first period is predefined or configured.

8. The method according to claim 7, wherein, the first report further indicates at least one of the following: the identifier of the target cell, whether there is an available early timing value in the target cell, the access type used by the terminal device to access the target cell, the access type being random access free or random access, or the access type being random access free, the beam indication information for uplink or downlink data transmission in the target cell, the identifier of the first cell, the first cell being a cell with an available early timing value, and the first cell belonging to one or more of the at least one candidate cell, first time information, the first time information including at least one of the following: the duration from when the terminal device receives the configuration information of the at least one candidate cell to when the terminal device receives the first information or to when the terminal device initiates a cell handover, the duration from when the terminal device receives the first physical downlink control channel PDCCH instruction to when the terminal device receives the first information or to when the terminal device initiates a cell handover, the duration from when the terminal device receives the last physical downlink control channel PDCCH instruction to when the terminal device receives the first information or to when the terminal device initiates a cell handover.

9. The method according to claim 7 or 8, wherein, the first report further indicates at least one of the following: the type of connection failure, the type of connection failure being handover failure or radio link failure; the reason for the handover failure, wherein the reason for the handover failure includes at least one of the following: the running duration of the third timer is greater than or equal to the third threshold value, the running duration of the third timer is the duration from when the terminal device receives the first information to when the terminal device completes random access or when the terminal device sends the first uplink data; the running duration of the fourth counter is greater than or equal to the fourth threshold value, and the running duration of the fourth timer is the duration from when the terminal receives or executes an RRC reconfiguration message with a synchronization function to when the terminal device completes random access or when the terminal device receives a physical control channel transmission after the first uplink transmission in random access free; the handover type of the previous handover is layer 1 or layer 2 mobility handover; the cell where the connection failure is detected is the target cell; second time information, the second time information including the duration from when the terminal device receives the previous layer 1 or layer 2 mobility command to when the cell handover fails, or to when the terminal device sends the first report, or, the second time information includes the duration from when the terminal device initiates a cell handover to when the cell handover fails, or to when the terminal device sends the first report; the running duration of the third timer; The running duration of the fourth timer; Layer 1 measurement results or layer 3 measurement results available when the detection fails; Cell handover process information based on random access, where the cell handover process information based on random access includes information on a two-step random access process and / or a four-step random access process.

10. A communication method, characterized in that, it includes: Sending a first piece of information, the first piece of information indicating that the terminal device switches from a source cell to a target cell, the target cell belonging to at least one candidate cell, the configuration information of the target cell belonging to the configuration information of the at least one candidate cell received by the terminal device, and the first piece of information is sent via a media access control control element; Receiving a first report, the first report being used to indicate the reason for the connection failure during the mobility process of layer 1 or layer 2 performed by the terminal device.

11. The method according to claim 10, characterized in that, The first report further indicates information on a first candidate cell, and the information on the first candidate cell includes at least one of the identification information of the first candidate cell, whether the first candidate cell is configured with a random access response (RAR), or the layer 1 reporting configuration information corresponding to the first candidate cell, and the first candidate cell is one or more of the at least one candidate cell.

12. The method according to claim 10 or 11, characterized in that, The first report further indicates early timing advance information, and the early timing advance information includes at least one of whether the terminal device performs early timing advance in the target cell, the candidate cell for performing the early timing advance, the number of physical downlink control channel (PDCCH) instructions indicating the execution of the early timing advance to the candidate cell, physical random access channel resource information, synchronization signal block beam identification, or preamble identification.

13. The method according to any one of claims 10 to 12, characterized in that, The connection failure includes a radio link failure of the source cell, and the reasons for the radio link failure include at least one of the following: The running duration of a first timer is greater than or equal to a first threshold value, where the running duration of the first timer is the duration from when the terminal device detects a physical layer out-of-sync problem with the source network device to when the terminal device receives the first piece of information; The running duration of a second timer is greater than or equal to a second threshold value, where the running duration of the second timer is the duration from when the terminal device triggers the sending of a measurement report during the running of the first timer to when the terminal device receives the first piece of information.

14. The method according to claim 13, characterized in that, The reasons for the radio link failure further include at least one of random access failure, beam failure recovery failure, listen-before-talk failure, and the number of radio link layer control protocol retransmissions being greater than or equal to a fifth threshold value.

15. The method according to claim 13 or 14, characterized in that, The first report also indicates the radio link failure information of the source cell, where the radio link failure information of the source cell includes at least one of the layer 1 measurement results or layer 3 measurement results available at the time of detection failure, the connection failure type being radio link failure, the cell with radio link failure being the source cell, or the duration from when the terminal device receives the configuration information of the at least one candidate cell to when the terminal device detects the radio link failure of the source cell.

16. The method according to any one of claims 10 to 12, characterized in that, the connection failure includes a handover failure of the terminal device or a handover failure within a first time period after a successful handover, and the first time period is predefined or configured.

17. The method according to claim 16, characterized in that, the first report also indicates at least one of the following: the identifier of the target cell, whether the target cell has an available early timing value, the access type used by the terminal device to access the target cell, where the access type is access without random access or random access, or the access type is access without random access, the beam indication information of the target cell for uplink or downlink data transmission, the identifier of the first cell, where the first cell is a cell with an available early timing value, and the first cell belongs to one or more of the at least one candidate cell, the first time information, where the first time information includes at least one of the following: the duration from when the terminal device receives the configuration information of the at least one candidate cell to when the terminal device receives the first information or to when the terminal device initiates a cell handover, the duration from when the terminal device receives the first physical downlink control channel PDCCH instruction to when the terminal device receives the first information or to when the terminal device initiates a cell handover, the duration from when the terminal device receives the last physical downlink control channel PDCCH instruction to when the terminal device receives the first information or to when the terminal device initiates a cell handover.

18. The method according to claim 16 or 17, characterized in that, the first report also indicates at least one of the following: the type of connection failure, where the type of connection failure is handover failure or radio link failure; the reason for the handover failure, where the reason for the handover failure includes at least one of the following: the running duration of the third timer is greater than or equal to the third threshold value, the running duration of the third timer is the duration from when the terminal device receives the first information to when the terminal device completes random access or when the terminal device sends the first uplink data; the running duration of the fourth counter is greater than or equal to the fourth threshold value, and the running duration of the fourth timer is the duration from when the terminal receives or executes an RRC reconfiguration message with a synchronization function to when the terminal device completes random access or when the terminal device receives a physical control channel transmission after the first uplink transmission in access without random access; the handover type of the previous handover is layer 1 or layer 2 mobility handover; the cell where the connection failure is detected is the target cell; The second time information, where the second time information includes the duration from the time of receiving the previous layer 1 or layer 2 mobility command by the terminal device to the occurrence of a cell handover failure, or to the time when the terminal device sends the first report, Alternatively, the second time information includes the duration from the time when the terminal device initiates a cell handover to the occurrence of a cell handover failure, or to the time when the terminal device sends the first report; The running duration of the third timer; The running duration of the fourth timer; The layer 1 measurement results or layer 3 measurement results available at the time of detection failure; Cell handover process information based on random access, where the cell handover process information based on random access includes information on a two-step random access process and / or a four-step random access process.

19. A communication device, Characterized in that, It includes a module for executing the method according to any one of claims 1 to 9.

20. A communication device, Characterized in that, It includes a module for executing the method according to any one of claims 10 to 18.

21. A communication system, Characterized in that, It includes the communication devices according to claims 19 and 20.

22. A computer-readable storage medium, Characterized in that, A computer program or instruction is stored on the computer-readable storage medium, and when the computer program or instruction runs on a computer, the computer is caused to execute the method according to any one of claims 1 to 18.

23. A computer program product, Characterized in that, The computer program product includes instructions for executing the method according to any one of claims 1 to 18.

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