WO2024016938A1 - 一种通信方法及装置 - Google Patents

一种通信方法及装置 Download PDF

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Publication number
WO2024016938A1
WO2024016938A1 PCT/CN2023/101866 CN2023101866W WO2024016938A1 WO 2024016938 A1 WO2024016938 A1 WO 2024016938A1 CN 2023101866 W CN2023101866 W CN 2023101866W WO 2024016938 A1 WO2024016938 A1 WO 2024016938A1
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WIPO (PCT)
Prior art keywords
information
cell
network device
failure
terminal device
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PCT/CN2023/101866
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English (en)
French (fr)
Inventor
王凡凡
耿婷婷
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华为技术有限公司
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Publication of WO2024016938A1 publication Critical patent/WO2024016938A1/zh

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/0005—Control or signalling for completing the hand-off
    • H04W36/0055—Transmission or use of information for re-establishing the radio link
    • H04W36/0079—Transmission or use of information for re-establishing the radio link in case of hand-off failure or rejection
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/0005—Control or signalling for completing the hand-off
    • H04W36/0055—Transmission or use of information for re-establishing the radio link
    • H04W36/0061—Transmission or use of information for re-establishing the radio link of neighbour cell information
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/0005—Control or signalling for completing the hand-off
    • H04W36/0055—Transmission or use of information for re-establishing the radio link
    • H04W36/0077—Transmission or use of information for re-establishing the radio link of access information of target access point
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/08—Reselecting an access point

Definitions

  • the present application relates to the field of communication technology, and in particular, to a communication method and device.
  • DC dual-connectivity
  • MR- DC multi-mode dual connectivity
  • MN main base station
  • SN secondary base stations or secondary nodes
  • the UE can receive services from multiple cells at the same time under one base station.
  • the cell group where the MN provides services to the UE can be called the master cell group (MCG), and the cell group where the SN provides services to the UE can be called the secondary cell group. (secondary cell group, SCG). Therefore, the UE can connect to the MN through one or more cells in the MCG, and can also connect to the SN through one or more cells in the SCG.
  • MCG master cell group
  • SCG secondary cell group
  • the embodiments of the present application provide a communication method and device, which is beneficial to quickly restoring the wireless link between the terminal equipment and the primary cell group.
  • embodiments of the present application provide a communication method that can be applied to a terminal device (such as a device or chip of the terminal device).
  • a terminal device such as a device or chip of the terminal device.
  • the terminal device sends first failure information to the second network device, and the first failure information includes first conditional handover configuration information.
  • the terminal device receives a first response message from the second network device, where the first response message includes first indication information or a cell identity of the first cell.
  • the first indication information is used to instruct the terminal device to select a cell to access from the candidate cells configured with the first conditional handover configuration information.
  • the first cell is the cell to be switched by the terminal device and is a candidate configured with the first conditional handover configuration information.
  • the first conditional switching configuration information is conditional switching configuration information configured by the first network device for the terminal device.
  • the first network device is a network device to which the primary cell group to which the terminal device is connected belongs
  • the second network device is a network device to which the secondary cell group to which the terminal device is connected belongs.
  • the terminal device may receive an instruction to switch the configuration from the first condition when the wireless link between the terminal device and the first network device is restored.
  • the cells in the candidate cells configured by the conditional handover configuration information are conducive to quickly restoring the wireless link between the terminal device and the primary cell group.
  • the first failure information reported includes the first conditional handover configuration information, which is beneficial to the second A network device subsequently optimizes the conditional handover configuration information of the terminal device based on the first failure information, which can reduce the number of late conditional handovers, thereby reducing the probability of wireless link failure between the terminal device and the first network device.
  • the terminal device if the terminal device fails to access the first cell or the second cell, or if the terminal device successfully accesses the first cell or the second cell and a wireless link failure occurs within a preset time period, the terminal device performs radio resource Control connection re-establishment.
  • the second cell is a cell that the terminal device selects to access based on the first indication information.
  • the terminal device fails to access the cell based on the first response information, or if the access to the cell is successful but a wireless link failure occurs within the preset time period, it can be determined that the terminal device failed to access the target cell based on the first response information. Therefore, the terminal The device performs radio resource control connection re-establishment to re-access the target cell.
  • the terminal device if the terminal device fails to access the first cell or the second cell, or if the terminal device successfully accesses the first cell or the second cell and a wireless link failure occurs within a preset time period, the terminal device also Can record the second failure information and send the failure to the third network device report, the failure report including second failure information.
  • the third network device is a network device to which the terminal device successfully reconnects.
  • the second failure information includes the message indication type of the first response message, and also includes the failure of the terminal device to access the first cell or the second cell according to the first response message, or the success of accessing the first cell or the second cell. And a wireless link failure occurs within the preset time period.
  • the message indication type of the first response message indicates that the first response message includes first indication information or a cell identity of the first cell.
  • the terminal device may also send the second failure information in the form of a failure report to the third network device when accessing the cell based on the first response information is unsuccessful, so that the third network device forwards the failure report to the first network device, This facilitates the first network device to analyze the reason why the terminal device failed to access the cell based on the failure report.
  • the second failure information also includes second indication information, and the second indication information is used to instruct the terminal device that the cell in which the first response message is received is the primary cell in the primary cell group, and the first response information is The terminal device records the last received information before the second failure information.
  • the second failure information also includes third indication information, and the third indication information is used to indicate whether the cell that the terminal device failed to access according to the first response message is configured with the first condition switching configuration information. of candidate cells.
  • this application also provides a communication processing method.
  • the communication method in this aspect corresponds to the communication method described in the first aspect.
  • the communication method in this aspect is explained from the first network device side (can be applied to First network device device or chip).
  • the first network device receives first failure information from the second network device, and the first failure information includes information about the failure of the wireless link between the terminal device and the first network device and first conditional handover configuration information.
  • the first network device sends first response information to the second network device, where the first response message includes first indication information or a cell identity of the first cell.
  • the first indication information is used to instruct the terminal device to select a cell to access from the candidate cells configured with the first conditional handover configuration information.
  • the first cell is the cell to be switched by the terminal device and is a candidate configured with the first conditional handover configuration information.
  • the first network device is a network device to which the primary cell group to which the terminal device is connected belongs
  • the second network device is a network device to which the secondary cell group to which the terminal device is connected belongs.
  • the first response information sent includes an instruction to switch the configuration from the first condition.
  • the conditional switching of the cells among the candidate cells configured by the configuration information is beneficial to quickly restoring the wireless link between the terminal device and the primary cell group.
  • the first failure information received by the first network device includes the first conditional switching configuration information configured by the first network device for the terminal device, which can enable the first network device to subsequently optimize the conditional switching configuration information of the terminal device based on the first failure information. , thereby reducing the number of occurrences of late conditional handovers, thereby reducing the probability of wireless link failure between the terminal device and the first network device.
  • the first network device may also receive a failure report from the third network device, and associate the first failure information with the failure report.
  • the failure report includes second failure information
  • the second failure information includes the message indication type of the first response message, and also includes that the terminal device fails to access the first cell or the second cell according to the first response message, or fails to access the first cell.
  • the cell or second cell is successful and a radio link failure occurs within a preset time period.
  • the message indication type of the first response message indicates that the first response message includes first indication information or a cell identity of the first cell.
  • the second cell is a cell that the terminal device selects to access based on the first indication information.
  • the third network device is a network device to which the terminal device successfully reconnects.
  • the first network device may also receive a failure report recorded when the terminal device fails to access the cell according to the first response information, and associate the failure report with the first failure information, thereby enabling the first network device to perform more detailed operations based on the associated failure information. Accurately jointly analyze the cause of wireless link failure between the terminal device and the first network device and the failure to access the cell based on the first response information.
  • the second failure information includes the cell wireless network temporary identification carried in the failure report and the cell wireless network temporary identification carried in the first failure information when the terminal device fails to access the first cell or the second cell according to the first response message.
  • the wireless network temporary identifiers are the same, and the failure report is the failure report closest to the recording time of the first failure information.
  • the second failure information includes when the terminal equipment fails to access the first cell or the second cell according to the first response message, indicating that the terminal equipment has not successfully accessed the first cell or the second cell, that is, the serving cell of the terminal equipment has not changed, so that The cell wireless network temporary identification of the terminal device has not changed. Then, the failure report associated with the first network device and the first failure information carry the same cell wireless network temporary identifier, and the failure report is the failure report closest to the recording time of the first failure information.
  • the second failure information includes candidates carried in the failure report when the terminal device successfully accesses the first cell or the second cell according to the first response message and a wireless link failure occurs within a preset time period.
  • the cell corresponding to the cell identifier is a cell among the candidate cells configured by the first conditional handover configuration information in the first failure information, and the failure report is the failure report closest to the recording time of the first failure information.
  • the second failure information includes when the terminal device successfully accesses the first cell or the second cell according to the first response message and a wireless link failure occurs within a preset time period, indicating that the terminal device has accessed the first cell or the second cell in a relatively short period of time.
  • the serving cell of the terminal device changes when the terminal device successfully accesses the first cell or the second cell, that is, the temporary identifier of the cell wireless network of the terminal device changes.
  • the first conditional handover configuration information of the terminal device has not changed. Therefore, the first network device can change the cell according to the cell principle that the cell corresponding to the candidate cell identifier carried in the failure report is a candidate cell configured by the first conditional handover configuration information.
  • the first failure information is associated with a failure report, and the failure report is the failure report closest to the recording time of the first failure information.
  • the second failure information also includes second indication information, and the second indication information is used to instruct the terminal device that the cell in which the first response message is received is the primary cell in the primary cell group, and the first response information is The terminal device records the last received information before the second failure information.
  • the second failure information also includes third indication information, and the third indication information is used to indicate whether the cell that the terminal device failed to access according to the first response message is configured with the first condition switching configuration information. of candidate cells.
  • the first network device counts a first delay
  • the first delay is an average inter-site interaction delay between the first network device and the second network device. This method is beneficial to the first network device, when the terminal device fails to perform fast link recovery, determine whether the cause of the terminal device's failure to perform fast link recovery is a connection between the first network device and the second network device based on the first delay. This is caused by the average inter-site interaction delay (i.e. the first delay) being too large.
  • the present application also provides a communication processing method.
  • the communication method in this aspect corresponds to the communication method described in the first aspect and the second aspect.
  • the communication method in this aspect is explained from the second network device side. (Can be applied to the device or chip of the second network device).
  • the second network device receives first failure information from the terminal device, where the first failure information includes information on the failure of the wireless link between the terminal device and the first network device and first conditional handover configuration information.
  • the second network device sends first failure information to the first network device.
  • the second network device receives the first response information from the first network device, and the first response message includes the first indication information or the cell identity of the first cell.
  • the second network device sends the first response information to the terminal device.
  • the first indication information is used to instruct the terminal device to select a cell to access from the candidate cells configured with the first conditional handover configuration information.
  • the first cell is the cell to be switched by the terminal device and is a candidate configured with the first conditional handover configuration information.
  • the first network device is a network device to which the primary cell group to which the terminal device is connected belongs
  • the second network device is a network device to which the secondary cell group to which the terminal device is connected belongs.
  • the second network device forwards the first failure information reported by the terminal device to the first network device, and forwards the first response information sent by the first network device.
  • the fast wireless link between the terminal device and the first network device is restored successfully, thereby facilitating the terminal device to timely access the cell among the candidate cells configured by the first conditional handover configuration information based on the first response information, That is, it is helpful to quickly restore the wireless link between the terminal equipment and the primary cell group.
  • the second network device collects statistics on the second delay and the third delay.
  • the second delay is the average inter-site interaction delay between the second network device and the first network device in exchanging the first failure information and the first response information, or is the average inter-site interaction delay between the second network device and the first network device. time delay.
  • the third delay is the average delay of the control plane signaling air interface interaction between the second network device and the terminal device.
  • the average air interface interaction delay is divided into uplink delay and downlink delay.
  • the existing user plane data packets can be directly adopted.
  • the uplink delay and downlink delay results are the granular delay statistical results of each data wireless bearer of each terminal device. You can also refer to the statistical method of user plane data packets to count the uplink delay and downlink delay of control plane signaling according to the granularity of each signaling wireless bearer of each terminal device.
  • This method is conducive to the second network device sending the second delay and the third delay to the first network device, which is beneficial to the first network device based on the second delay and the third delay when the terminal device fails to perform fast link recovery.
  • Delay to determine the reason why the terminal device fails to perform fast link recovery For example, if the second delay is greater than the first preset value, the first network device determines that the reason why the terminal device fails to perform fast link recovery may be that the second delay is too large. For another example, if the third delay is greater than the second preset value, the first network device determines that the reason why the terminal device fails to perform fast link recovery may be that the third delay is too large.
  • embodiments of the present application also provide a communication processing method, which can be applied to a terminal device (such as a device or chip of the terminal device).
  • the method includes: if the wireless link between the terminal device and the first network device fails, and the fast link recovery between the terminal device and the first network device fails and the first timer has not expired, the first failure information and the third Failure information is recorded in the first wireless link failure report. If the wireless link between the terminal device and the first network device fails, and the fast link recovery between the terminal device and the first network device fails and the first timer times out, the first failure information is recorded in the second wireless link failure report, and record the third failure information in the third wireless link failure report.
  • the first failure information is information that a wireless link failure occurs between the terminal device and the first network device
  • the third failure information is information that the terminal device fails to perform fast link recovery.
  • the first network device is a network device to which the primary cell group to which the terminal device access belongs.
  • the first timer is started when the terminal device detects a failure of the wireless link with the first network device.
  • the fast link recovery fails, it can be determined whether the first failure information and the third failure information are recorded in the same wireless link failure report or recorded in different wireless link failure reports based on whether the first timer times out. .
  • the cause of the failure of fast link recovery between the terminal device and the first network device may be highly related to the failure of the wireless link between the terminal device and the first network device, so the first timer will be used.
  • the first failure information and the third failure information are recorded in the same wireless link failure report (i.e., the first wireless link failure report), which is helpful for the subsequent first network device to jointly analyze the terminal device and the terminal device based on the first wireless link failure report.
  • the reason for the failure of fast link recovery between the terminal device and the first network device may be weakly related to the failure of the wireless link between the terminal device and the first network device, so the first timer will be used.
  • the failure information and the third failure information are recorded in different wireless link failure reports respectively.
  • the fast link recovery between the terminal device and the first network device fails, if the first failure information and the third failure information are recorded in different wireless link failure reports, only the latest wireless link failure report will be left in the end.
  • the link failure report that is, the wireless link report that records the third failure information will overwrite the wireless link failure report that contains the first failure information.
  • the terminal device records the first failure information and the third failure information on the same wireless link. In the failure report, the record integrity of the failure information can be ensured, which is helpful for the first network device to obtain complete wireless link failure information.
  • the third failure information includes one or more of the following: indication information indicating whether the terminal device fails to perform fast link recovery, the timeout reason of the third timer, the occurrence of a wireless link in the secondary cell group Reason for failure, secondary cell group deactivation.
  • the third failure information includes one or more of the above, it is beneficial for the first network device to determine the reason why the terminal device failed to perform fast link recovery based on the content of the third failure information after receiving the third failure information.
  • the terminal device when the terminal device records the first failure information and the third failure information in the first wireless link failure report, it may also send the first wireless link failure report to the fourth network device.
  • the terminal device when the terminal device records the first failure information in the second wireless link failure report and records the third failure information in the third wireless link failure report, the terminal device may also send the second wireless link failure information to the fourth network device. Failure report, or, send a third wireless link failure report.
  • the fourth network device is a network device to which the terminal device successfully accesses after detecting that the wireless link with the first network device fails and the fast link recovery with the first network device fails.
  • the fourth network device is a terminal device that detects that the wireless link with the first network device fails and the fast link recovery with the first network device fails, it performs cell selection, and the selected cell is When first switching a cell among the candidate cells configured in the configuration information, the network device to which the successfully accessed cell belongs.
  • the fourth network device is a terminal device that performs cell selection after detecting that the wireless link with the first network device fails and the fast link recovery with the first network device fails.
  • the selected cell is not When the first condition is to switch a cell among the candidate cells configured in the configuration information, the radio resource control connection is re-established and the network device is re-connected successfully.
  • This method is conducive to the fourth network device forwarding the first wireless link failure report to the first network device, or forwarding the second wireless link failure report and the third wireless link failure report, which is beneficial to the first network device according to the received
  • the wireless link failure report analyzes the reasons for the failure of the wireless link between the terminal device and the first network device and the failure of fast link recovery with the first network device.
  • the terminal device when the terminal device fails to perform conditional handover recovery using the third cell, it can also determine the recording method of the first failure information, the third failure information, and the fourth failure information based on the second timer. .
  • the fourth failure information is information that the terminal equipment fails to perform conditional handover-based recovery using the third cell.
  • the third cell is obtained through cell selection after the terminal device detects the failure of the wireless link with the first network device and the failure of fast link recovery with the first network device and is the first conditional handover configuration information configuration. of candidate cells.
  • the second timer is started when the terminal device detects that the fast link recovery with the first network device fails.
  • the terminal device determines the first failure information, the third failure information and the third failure information according to the second timer.
  • the four failure information recording methods include: if the second timer does not expire, the fourth failure information is recorded in the first wireless link failure report; if the second timer times out, the fourth failure information is recorded in the fourth wireless link failure report. Road failure report in progress.
  • the terminal device records the fourth failure information in the first wireless link failure report, that is, the first failure
  • the information, the third failure information and the fourth failure information are all recorded in the same wireless link failure report to facilitate the first network device to jointly analyze the wireless connection with the first network device based on the first wireless link failure report.
  • the terminal device records the fourth failure information in a fourth wireless link different from the first wireless link failure report. In the path failure report, the fourth failure information is not associated with the first failure information and the third failure information.
  • the terminal device may also send a first wireless link failure report to the third network device, or send a fourth wireless link failure report.
  • the third network device is a network device to which the terminal device successfully reconnects. This method enables the third network device to forward the received wireless link failure report to the first network device, thereby facilitating the first network device to analyze the cause of the wireless link failure of the terminal device based on the received wireless link failure report.
  • the terminal device determines the third timer based on the second timer.
  • a recording method of failure information, third failure information and fourth failure information including: if the second timer does not expire, recording the fourth failure information in the second wireless link failure report or the third wireless link failure report ; If the second timer times out, record the fourth failure information in the fourth wireless link failure report.
  • the terminal device records the fourth failure information in the second wireless link failure report.
  • the link failure report and the third wireless link failure report to benefit the first network device according to two of the first failure information, the third failure information and the fourth failure information. Failure information, jointly analyze the reasons for wireless link failure of the terminal device.
  • the terminal device may also send a second wireless link failure report, or a third wireless link failure report, or a fourth wireless link failure report to the third network device.
  • the third network device is a network device to which the terminal device successfully reconnects after recovery failure based on conditional handover. This method enables the third network device to forward the received wireless link failure report to the first network device, thereby facilitating the first network device to analyze the cause of the wireless link failure of the terminal device based on the received wireless link failure report.
  • the present application also provides a communication method.
  • the communication method in this aspect corresponds to the communication method described in the fourth aspect.
  • the communication method in this aspect is explained from the first network device side (can be applied to the first network device side).
  • the first network device receives a first wireless link failure report.
  • the first network device determines the second conditional handover configuration information of the terminal device based on the first wireless link failure report.
  • the first wireless link failure report includes first failure information and third failure information, or includes first failure information, third failure information and fourth failure information.
  • the first failure information is information that a wireless link failure occurs between the terminal device and the first network device.
  • the third failure information is information that the terminal device fails to perform fast link recovery.
  • the fourth failure information is that the terminal device performs condition-based switching. Recovery failed information.
  • the first network device is a network device to which the primary cell group to which the terminal device access belongs.
  • the first network device receives the first wireless link failure report, analyzes the cause of the wireless link failure of the terminal device based on the first wireless link failure report, and then determines the second conditional switching configuration information of the terminal device. , that is, optimizing the network device configuration to provide the original conditional switching configuration information of the terminal device, which is conducive to improving the success rate of the terminal device accessing the cell.
  • the present application also provides a communication processing method.
  • the communication method in this aspect corresponds to the communication method described in the fourth aspect.
  • the communication method in this aspect is explained from the first network device side (can be applied to First network device device or chip).
  • the first network device receives the second wireless link failure report or the third wireless link failure report.
  • the first network device determines the second conditional switching configuration information of the terminal device according to the second wireless link failure report or the third wireless link failure report.
  • the second wireless link failure report includes first failure information
  • the third wireless link failure report includes third failure information
  • the second wireless link failure report includes first failure information and fourth failure information
  • the third The wireless link failure report includes third failure information; alternatively, the second wireless link failure report includes first failure information, and the third wireless link failure report includes third failure information and fourth failure information.
  • the first failure information is information that a wireless link failure occurs between the terminal device and the first network device.
  • the third failure information is information that the terminal device fails to perform fast link recovery.
  • the fourth failure information is that the terminal device performs condition-based switching. Recovery failed information.
  • the first network device is a network device to which the primary cell group to which the terminal device access belongs.
  • the first network device receives a wireless link failure report after the wireless link failure occurs on the terminal device, so that the first network device can analyze the wireless link failure report on the terminal device based on the received wireless link failure report. reasons, and then optimize the network device configuration to the original conditional switching configuration information of the terminal device, which is conducive to improving the success rate of the terminal device accessing the community.
  • the present application also provides a communication processing method.
  • the communication method in this aspect corresponds to the communication method described in the fourth aspect.
  • the communication method in this aspect is explained from the first network device side (can be applied to First network device device or chip).
  • the first network device receives the first wireless link failure report or the fourth wireless link failure report.
  • the first network device determines the second conditional switching configuration information of the terminal device according to the first wireless link failure report or the fourth wireless link failure report.
  • the first wireless link failure report includes first failure information and third failure information
  • the fourth wireless link failure report includes fourth failure information.
  • the first failure information is information that a wireless link failure occurs between the terminal device and the first network device.
  • the third failure information is information that the terminal device fails to perform fast link recovery.
  • the fourth failure information is that the terminal device performs condition-based switching. Recovery failed information.
  • the first network device is a network device to which the primary cell group to which the terminal device access belongs.
  • the first network device receives the first wireless link failure report or the fourth wireless link failure report after the wireless link failure occurs in the terminal device.
  • Line link failure report Therefore, the first network device can analyze the cause of the wireless link failure of the terminal device based on the first wireless link failure report or the fourth wireless link failure report, and optimize the original condition switching configuration information configured by the network device to the terminal device, It is helpful to improve the success rate of terminal equipment accessing the community.
  • the present application also provides a communication processing method.
  • the communication method in this aspect corresponds to the communication method described in the fourth aspect.
  • the communication method in this aspect is explained from the first network device side (can be applied to First network device device or chip).
  • the first network device receives a second wireless link failure report, or receives a third wireless link failure report, or receives a fourth wireless link failure report.
  • the first network device determines the second conditional switching configuration information of the terminal device according to the received wireless link failure report.
  • the second wireless link failure report includes first failure information
  • the third wireless link failure report includes second failure information
  • the fourth wireless link failure report includes fourth failure information.
  • the first failure information is information that a wireless link failure occurs between the terminal device and the first network device.
  • the third failure information is information that the terminal device fails to perform fast link recovery.
  • the fourth failure information is that the terminal device performs condition-based switching. Recovery failed information.
  • the first network device is a network device to which the primary cell group to which the terminal device access belongs.
  • the first network device receives a second wireless link failure report, a third wireless link failure report, or a fourth wireless link failure report after a wireless link failure occurs in the terminal device. Therefore, the first network device can analyze the reasons for the wireless link failure of the terminal device based on the received wireless link failure report, and optimize the original condition switching configuration information configured by the network device to the terminal device, which is beneficial to improving the access of the terminal device to the cell. success rate.
  • the present application also provides a communication device.
  • the communication device has the ability to realize part or all of the functions of the terminal device described in the first aspect, or to realize part or all of the functions of the first network device described in the second aspect, or to realize the functions of the third aspect.
  • the communication device may have the functions of some or all of the embodiments of the terminal device described in the first aspect of this application, or may have the functions of independently implementing any of the embodiments of this application.
  • the functions described can be implemented by hardware, or can be implemented by hardware executing corresponding software.
  • the hardware or software includes one or more units or modules corresponding to the above functions.
  • the structure of the communication device may include a processing unit and a communication unit, and the processing unit is configured to support the communication device to perform corresponding functions in the above method.
  • the communication unit is used to support communication between the communication device and other communication devices.
  • the communication device may further include a storage unit coupled to the processing unit and the communication unit, which stores necessary program instructions and data for the communication device.
  • the communication device includes: a processing unit and a communication unit; the processing unit is used to control the communication unit to send and receive data/signaling;
  • a communication unit configured to send first failure information to the second network device when the wireless link with the first network device fails, where the first failure information includes first conditional handover configuration information, and the first network device
  • the device is a network device to which the primary cell group to which the device is connected belongs, and the second network device is a network device to which the secondary cell group to which the device is connected belongs;
  • the communication unit is also used to receive messages from the second network The first response message of the device;
  • the first response message includes first indication information or the cell identity of the first cell;
  • the first indication information is used to instruct the device to select a cell to access from the candidate cells configured by the first conditional handover configuration information; the first cell is the cell to be switched by the device and is the cell to be switched.
  • the first condition is used to switch a cell among the candidate cells configured by the configuration information.
  • the communication device includes: a processing unit and a communication unit; the processing unit is used to control the communication unit to send and receive data/signaling;
  • a communication unit configured to receive first failure information from a second network device, where the first failure information includes information on a wireless link failure between a terminal device and the first network device and first conditional handover configuration information, so
  • the device is a device to which the primary cell group to which the terminal equipment is accessed belongs, and the second network device is a network device to which the secondary cell group to which the terminal equipment is accessed belongs;
  • the communication unit is also configured to send a message to the second The network device sends first response information;
  • the first response message includes first indication information or the cell identity of the first cell;
  • the first instruction information is used to instruct the terminal device to select a cell to access from the candidate cells configured by the first conditional handover configuration information; the first cell is the cell to be switched by the terminal device, and It is a cell among the candidate cells configured by the first conditional handover configuration information.
  • the communication device includes: a processing unit and a communication unit; the processing unit is used to control the communication unit to send and receive data/signaling;
  • a communication unit configured to receive first failure information from a terminal device, where the first failure information includes information on a wireless link failure between the terminal device and a first network device and first conditional handover configuration information.
  • a network device is the primary cell accessed by the terminal device The network equipment to which the group belongs, and the device is the device to which the secondary cell group to which the terminal equipment accesses belongs; the communication unit is also used to send the first failure information to the first network equipment; the communication unit is also used to For receiving the first response information from the first network device; the communication unit is also used for sending the first response information to the terminal device;
  • the first response message includes first indication information or a cell identity of the first cell; the first indication information is used to instruct the terminal device to select a connection from the candidate cells configured by the first conditional handover configuration information.
  • the first cell is the cell to be switched by the terminal device and is a cell among the candidate cells configured by the first conditional handover configuration information.
  • the communication device includes: a processing unit and a communication unit; the communication unit is used for transmitting and receiving data/signaling;
  • a processing unit configured to, if the wireless link with the first network device fails and the fast link recovery with the first network device fails and the first timer has not expired, convert the first failure information and the first timer to the first network device. Three failure information is recorded in the first wireless link failure report; the processing unit is also used to if the wireless link with the first network device fails, and the fast link with the first network device Recovery fails and the first timer times out, recording the first failure information in a second wireless link failure report, and recording the third failure information in a third wireless link failure report;
  • the first failure information is information that a wireless link failure occurs between the device and the first network device
  • the third failure information is information that the device fails to perform fast link recovery
  • the first network device is a network device to which the primary cell group accessed by the device belongs
  • the first timer is started when the device detects a failure of the wireless link with the first network device.
  • the communication device includes: a processing unit and a communication unit;
  • the communication unit is configured to receive a first wireless link failure report; the processing unit is configured to determine the second conditional switching configuration information of the terminal device according to the first wireless link failure report;
  • the first wireless link failure report includes first failure information and third failure information, or includes first failure information, third failure information and fourth failure information;
  • the first failure information is the terminal Information about a wireless link failure occurring between the device and the device,
  • the third failure information is information about the terminal device's failure to perform fast link recovery, and
  • the fourth failure information is about the terminal device's condition-based switching.
  • the recovery failure information is obtained, and the device is a device to which the primary cell group accessed by the terminal equipment belongs.
  • the communication device includes: a processing unit and a communication unit;
  • a communication unit configured to receive a second wireless link failure report or a third wireless link failure report
  • a processing unit configured to determine the terminal according to the second wireless link failure report or the third wireless link failure report The second condition switching configuration information of the device
  • the second wireless link failure report includes first failure information
  • the third wireless link failure report includes third failure information; or, the second wireless link failure report includes first failure information and third failure information.
  • the third wireless link failure report includes third failure information; or, the second wireless link failure report includes first failure information, and the third wireless link failure report includes third failure information and fourth failure message;
  • the first failure information is information that a wireless link failure occurs between the terminal equipment and the device
  • the third failure information is information that the terminal equipment fails to perform fast link recovery
  • the fourth failure information is The information is information that the terminal equipment fails to perform conditional handover-based recovery
  • the device is a device to which the primary cell group to which the terminal equipment access belongs.
  • the communication device includes: a processing unit and a communication unit;
  • a communication unit configured to receive a first wireless link failure report or a fourth wireless link failure report
  • a processing unit configured to determine a terminal according to the first wireless link failure report or the fourth wireless link failure report The second condition switching configuration information of the device
  • the first wireless link failure report includes first failure information and third failure information
  • the fourth wireless link failure report includes fourth failure information
  • the first failure information is a link between the terminal equipment and the device.
  • the third failure information is the information that the terminal device fails to perform fast link recovery
  • the fourth failure information is the information that the terminal device fails to perform conditional handover-based recovery.
  • the device is a device to which the primary cell group accessed by the terminal equipment belongs.
  • the communication device includes: a processing unit and a communication unit;
  • a communication unit configured to receive a second wireless link failure report, or a third wireless link failure report, or a fourth wireless link failure report;
  • a processing unit configured to receive the second wireless link failure report according to the second wireless link failure report.
  • Report, or the third wireless link failure report, or the fourth wireless link failure report determine the second conditional handover configuration information of the terminal device;
  • the second wireless link failure report includes first failure information
  • the third wireless link failure report includes second failure information
  • the fourth wireless link failure report includes fourth failure information
  • the first failure The information is information that a wireless link failure occurs between the terminal equipment and the device
  • the third failure information is information that the terminal equipment fails to perform fast link recovery
  • the fourth failure information is that the terminal Information about the failure of the device to perform conditional handover recovery
  • the device is the network to which the primary cell group to which the terminal device is accessed belongs. equipment.
  • the communication unit may be a transceiver or a communication interface
  • the storage unit may be a memory
  • the processing unit may be a processor
  • the communication device includes: a processor and a transceiver; the processor is used to control the transceiver to send and receive data/signaling;
  • a transceiver configured to send first failure information to the second network device when the wireless link with the first network device fails, where the first failure information includes first conditional handover configuration information, and the first network device
  • the device is a network device to which the primary cell group to which the device is connected belongs, and the second network device is a network device to which the secondary cell group to which the device is connected belongs;
  • a transceiver is also used to receive signals from the second network The first response message of the device; the first response message includes first indication information or the cell identity of the first cell;
  • the first indication information is used to instruct the device to select a cell to access from the candidate cells configured by the first conditional handover configuration information; the first cell is the cell to be switched by the device and is the cell to be switched.
  • the first condition is used to switch a cell among the candidate cells configured by the configuration information.
  • the communication device includes: a processor and a transceiver; the processor is used to control the transceiver to send and receive data/signaling;
  • a transceiver configured to receive first failure information from a second network device, where the first failure information includes information on a wireless link failure between the terminal device and the device and first conditional handover configuration information, where the device is A device to which the primary cell group to which the terminal equipment is connected belongs, and the second network equipment is a network equipment to which the secondary cell group to which the terminal equipment is connected belongs; and a transceiver, which is also used to send data to the second network equipment.
  • First response information the first response message including first indication information or the cell identity of the first cell;
  • the first instruction information is used to instruct the terminal device to select a cell to access from the candidate cells configured by the first conditional handover configuration information, and the first cell is the cell to be switched by the terminal device and It is a cell among the candidate cells configured by the first conditional handover configuration information.
  • the communication device includes: a processor and a transceiver; the processor is used to control the transceiver to send and receive data/signaling;
  • a transceiver configured to receive first failure information from a terminal device, where the first failure information includes information on a wireless link failure between the terminal device and a first network device and first conditional handover configuration information.
  • a network device is a network device to which the primary cell group to which the terminal device is connected belongs, and the device is a device to which the secondary cell group to which the terminal device is connected belongs; and a transceiver is also used to send a signal to the first network device Send the first failure information; a transceiver, also used to receive the first response information from the first network device; a transceiver, also used to send the first response information to the terminal device;
  • the first response message includes first indication information or a cell identity of the first cell; the first indication information is used to instruct the terminal device to select a connection from the candidate cells configured by the first conditional handover configuration information.
  • the first cell is the cell to be switched by the terminal device and is a cell among the candidate cells configured by the first conditional handover configuration information.
  • the communication device includes: a processor and a transceiver; the transceiver is used for transmitting and receiving data/signaling;
  • a processor configured to, if the wireless link with the first network device fails and the fast link recovery with the first network device fails and the first timer has not expired, convert the first failure information and the first timer to the first network device. Three failure information is recorded in the first wireless link failure report; the processor is also configured to, if the wireless link with the first network device fails, and the fast link with the first network device Recovery fails and the first timer times out, recording the first failure information in a second wireless link failure report, and recording the third failure information in a third wireless link failure report;
  • the first failure information is information that a wireless link failure occurs between the device and the first network device
  • the third failure information is information that the device fails to perform fast link recovery
  • the The first network device is a network device to which the primary cell group accessed by the device belongs, and the first timer is started when the device detects a failure of the wireless link with the first network device.
  • the communication device includes: a processor and a transceiver
  • a transceiver configured to receive a first wireless link failure report
  • a processor configured to determine the second conditional switching configuration information of the terminal device according to the first wireless link failure report
  • the first wireless link failure report includes first failure information and third failure information, or includes first failure information, third failure information and fourth failure information;
  • the first failure information is the terminal Information about a wireless link failure occurring between the device and the device,
  • the third failure information is information about the terminal device's failure to perform fast link recovery, and
  • the fourth failure information is about the terminal device's condition-based switching.
  • the device is a device to which the primary cell group accessed by the terminal equipment belongs.
  • the communication device includes: a processor and a transceiver
  • a transceiver configured to receive a second wireless link failure report or a third wireless link failure report
  • a processor configured to determine the terminal according to the second wireless link failure report or the third wireless link failure report The second condition switching configuration information of the device
  • the second wireless link failure report includes first failure information
  • the third wireless link failure report includes third failure information; or, the second wireless link failure report includes first failure information and third failure information.
  • the third wireless link failure report includes third failure information; or, the second wireless link failure report includes first failure information, and the third wireless link failure report includes third failure information and fourth failure message;
  • the first failure information is information that a wireless link failure occurs between the terminal equipment and the device
  • the third failure information is information that the terminal equipment fails to perform fast link recovery
  • the fourth failure information is The information is information that the terminal equipment fails to perform conditional handover-based recovery
  • the device is a device to which the primary cell group to which the terminal equipment access belongs.
  • the communication device includes: a processor and a transceiver
  • a transceiver configured to receive a first wireless link failure report or a fourth wireless link failure report
  • a processor configured to determine the terminal according to the first wireless link failure report or the fourth wireless link failure report The second condition switching configuration information of the device
  • the first wireless link failure report includes first failure information and third failure information
  • the fourth wireless link failure report includes fourth failure information
  • the first failure information is a link between the terminal equipment and the device.
  • the third failure information is the information that the terminal device fails to perform fast link recovery
  • the fourth failure information is the information that the terminal device fails to perform conditional handover-based recovery.
  • the device is a device to which the primary cell group accessed by the terminal equipment belongs.
  • the communication device includes: a processor and a transceiver
  • a transceiver configured to receive a second wireless link failure report, or receive a third wireless link failure report, or receive a fourth wireless link failure report
  • a processor configured to receive the second wireless link failure report according to the second wireless link failure report. Report, or the third wireless link failure report, or the fourth wireless link failure report, determine the second conditional handover configuration information of the terminal device;
  • the second wireless link failure report includes first failure information
  • the third wireless link failure report includes second failure information
  • the fourth wireless link failure report includes fourth failure information
  • the first failure The information is information that a wireless link failure occurs between the terminal equipment and the device
  • the third failure information is information that the terminal equipment fails to perform fast link recovery
  • the fourth failure information is that the terminal Information indicating that the device failed to perform recovery based on conditional handover
  • the device is a device to which the primary cell group to which the terminal device accesses belongs.
  • the communication device is a chip or a chip system.
  • the processing unit can also be embodied as a processing circuit or a logic circuit; the communication unit can be an input/output interface, interface circuit, output circuit, input circuit, pin or related circuit on the chip or chip system.
  • the processor may be used to perform, for example, but not limited to, baseband related processing
  • the transceiver may be used to perform, for example, but not limited to, radio frequency transceiver.
  • the above-mentioned devices may be arranged on separate chips, or at least part or all of them may be arranged on the same chip.
  • processors can be further divided into analog baseband processors and digital baseband processors.
  • the analog baseband processor can be integrated with the transceiver on the same chip, and the digital baseband processor can be set on an independent chip. With the continuous development of integrated circuit technology, more and more devices can be integrated on the same chip.
  • the digital baseband processor can be integrated with a variety of application processors (such as but not limited to graphics processors, multimedia processors, etc.) on the same chip.
  • application processors such as but not limited to graphics processors, multimedia processors, etc.
  • SoC system on a chip
  • the embodiments of this application do not limit the implementation form of the above devices.
  • the present application also provides a processor for executing the above methods.
  • the process of sending the above information and receiving the above information in the above method can be understood as the process of the processor outputting the above information, and the process of the processor receiving the input above information.
  • the processor When outputting the above information, the processor outputs the above information to the transceiver for transmission by the transceiver. After the above information is output by the processor, it may also need to undergo other processing before reaching the transceiver.
  • the processor receives the input information
  • the transceiver receives the information and inputs it into the processor. Furthermore, after the transceiver receives the above information, the above information may need to undergo other processing before being input to the processor.
  • processor output and reception, input operations rather than the transmitting and receiving operations performed directly by RF circuits and antennas.
  • the above-mentioned processor may be a processor specifically designed to perform these methods, or may be a processor that executes computer instructions in a memory to perform these methods, such as a general-purpose processor.
  • the above-mentioned memory can be a non-transitory memory, such as a read-only memory (ROM), which can be integrated on the same chip as the processor, or can be separately provided on different chips.
  • ROM read-only memory
  • the present application also provides a communication system, which includes one or more network devices and one or more terminal devices.
  • the system may also include other devices that interact with network devices and terminal devices.
  • the present application provides a computer-readable storage medium for storing instructions.
  • the instructions When the instructions are executed by a computer, Implement the method described in any one of the above first to eighth aspects.
  • the present application also provides a computer program product including instructions that, when run on a computer, implement the method described in any one of the above-mentioned first to eighth aspects.
  • the present application provides a chip system.
  • the chip system includes a processor and an interface.
  • the interface is used to obtain a program or instructions.
  • the processor is used to call the program or instructions to implement or support a terminal device.
  • the functions involved in the fourth aspect may implement or support the first network device to implement the functions involved in any one of the fifth to eighth aspects. For example, at least one of the data and information involved in the above method is determined or processed.
  • the chip system further includes a memory, and the memory is used to store necessary program instructions and data for the terminal.
  • the chip system may be composed of chips, or may include chips and other discrete devices.
  • the present application provides a communication device, including a processor for executing a computer program or executable instructions stored in a memory.
  • the device executes the first aspect as described in the first aspect. to the methods in each possible implementation of any aspect of the eighth aspect.
  • processor and memory are integrated;
  • the above-mentioned memory is located outside the communication device.
  • beneficial effects from the ninth aspect to the fifteenth aspect can be referred to the beneficial effects from the first aspect to the eighth aspect, and will not be described again here.
  • Figure 1 is a schematic system structure diagram of a communication system provided by an embodiment of the present application.
  • Figure 2 is a schematic structural diagram of a network device provided by an embodiment of the present application.
  • Figure 3 is a schematic structural diagram of another network device provided by an embodiment of the present application.
  • Figure 4 is a schematic diagram of a conditional switching process provided by an embodiment of the present application.
  • Figure 5 is a schematic diagram of the architecture of each cell in multi-mode-dual connectivity provided by the embodiment of the present application.
  • Figure 6 is an interactive schematic diagram of a communication method provided by an embodiment of the present application.
  • Figure 7 is a schematic diagram of an interaction flow between multiple devices provided by an embodiment of the present application.
  • Figure 8 is an interactive schematic diagram of another communication method provided by an embodiment of the present application.
  • Figure 9 is a schematic diagram of another interaction flow between multiple devices provided by an embodiment of the present application.
  • Figure 10 is a schematic structural diagram of a communication device provided by an embodiment of the present application.
  • Figure 11 is a schematic structural diagram of another communication device provided by an embodiment of the present application.
  • a wireless communication system may include one or more network devices and one or more terminal devices. Wireless communication systems can also perform point-to-point communication, such as communication between multiple terminal devices.
  • the communication system in Figure 1 uses a network device that includes network device 1 and network device 2, and the terminal device is terminal device 1. Terminal device 1 can communicate with network device 1 and network device 2 at the same time, and the mobility management of network device 1 and the core network is Entity (mobility management entity, MME) connection, network device 2 is connected to the serving gateway (serving gateway, S-WG) of the core network as an example.
  • Entity mobility management entity
  • S-WG serving gateway
  • the wireless communication systems mentioned in the embodiments of this application include but are not limited to: narrowband-internet of things (NB-IoT), long term evolution (LTE), and 5G/6G mobile communication systems.
  • NB-IoT narrowband-internet of things
  • LTE long term evolution
  • 5G/6G mobile communication systems Three major application scenarios: enhanced mobile broadband (eMBB), ultra-reliable low latency communication (URLLC) and massive machine type of communication (mMTC), wireless fidelity ( wireless fidelity (WiFi) system, or mobile communication system after 5G, etc.
  • eMBB enhanced mobile broadband
  • URLLC ultra-reliable low latency communication
  • mMTC massive machine type of communication
  • WiFi wireless fidelity
  • mobile communication system after 5G etc.
  • the network device is a device with wireless transceiver function and is used to communicate with the terminal device.
  • network equipment It is a radio access network (RAN) node that connects terminal equipment to the wireless network.
  • RAN nodes include but are not limited to: gNB, transmission reception point (TRP), evolved Node B (eNB), radio network controller (RNC), Node B , NB), base station controller (BSC), base transceiver station (BTS), home base station (for example, home evolved NodeB, or home Node B, HNB), base band unit (base band unit, BBU), or wireless fidelity (Wifi) access point (AP), integrated access and backhaul (IAB), etc.
  • TRP transmission reception point
  • eNB evolved Node B
  • RNC radio network controller
  • Node B , NB Node B
  • BSC base station controller
  • BTS base transceiver station
  • home base station for example, home evolved NodeB, or home Node B, HNB
  • base band unit base band
  • network equipment may include a centralized unit (CU), a distributed unit (DU), or RAN equipment including a CU and a DU.
  • CU centralized unit
  • DU distributed unit
  • RAN equipment including a CU and a DU.
  • network devices include CUs and DUs.
  • CU can be divided into control plane (control plane) and user plane (user plane), that is, CU includes CU-CP and CU-UP.
  • CU-CP is responsible for the control plane function, which mainly includes radio resource control (RRC) and packet data convergence protocol control plane (PDCP-C).
  • RRC radio resource control
  • PDCP-C packet data convergence protocol control plane
  • PDCP-C is mainly responsible for encryption and decryption of control plane data, integrity protection, data transmission, etc.
  • CU-UP is responsible for user plane functions, mainly including service data adaptation protocol (service data adaptation protocol, SDAP) and packet data convergence protocol user plane (packet data convergence protocol user plane, PDCP-U).
  • SDAP is mainly responsible for processing core network data and mapping it to bearers.
  • PDCP-U is mainly responsible for data plane encryption and decryption, integrity protection, header compression, serial number maintenance, data transmission, etc.
  • CU-CP and CU-UP are connected through the E1 interface, CU-CP is connected to the DU through the F1-C interface, and CU-UP is connected to the DU through the F1-U interface.
  • PDCP-C is also in CU-UP.
  • DU includes wireless link control (radio link control, RLC), media access control (media access control, MAC) and physical (physical, PHY).
  • the network device includes a CU and two DUs.
  • CU includes RRC, SDAP and PDCP
  • DU includes RLC, MAC and PHY.
  • the CUs are connected to the two DUs through the F1 interface.
  • Network equipment can communicate and interact with core network equipment and provide communication services to terminal equipment.
  • the core network equipment is, for example, equipment in the 5G network core network (core network, CN).
  • core network As a bearer network, the core network provides an interface to the data network, provides terminals with communication connections, authentication, management, policy control, and carries data services.
  • the terminal device involved in the embodiment of this application is a device with wireless transceiver function.
  • Terminal equipment can be deployed on land, including indoors or outdoors, handheld or vehicle-mounted; it can also be deployed on water (such as ships, etc.); it can also be deployed in the air (such as aircraft, balloons, satellites, etc.).
  • the terminal device can be a user device, a chip or a functional module inside a certain device.
  • the terminal device can be a mobile phone (mobile phone), a tablet computer (pad), a computer with a wireless transceiver function, a virtual reality (VR) terminal device, an augmented reality (AR) terminal device, an industrial control ( Wireless terminal equipment in industrial control, wireless terminal equipment in self-driving, wireless terminal equipment in remote medical, wireless terminal equipment in smart grid, transportation safety Wireless terminals in safety), wireless terminal equipment in smart cities, wireless terminals in smart homes, or wireless terminals in future communication networks, etc., and may also include user equipment (UE) ), etc., are not restricted in this application.
  • UE user equipment
  • the source base station sends CHO configuration information to the terminal device.
  • the CHO configuration information includes information about one or more candidate cells (for example, the global cell identity of the candidate cell). (cell global identifier, CGI)), CHO trigger condition, or the physical cell identifier (physical cell Identifier, PCI) of the candidate cell and the frequency information corresponding to each candidate cell.
  • CGI cell global identifier
  • PCI physical cell identifier
  • the terminal device determines whether the cell quality of the candidate cell configured in the CHO configuration information meets the CHO triggering conditions, uses the cell that meets the CHO triggering conditions as the target handover cell, and initiates a handover to the target cell. Random access channel (RACH).
  • RACH Random access channel
  • the terminal device When the terminal device successfully randomly accesses the target handover cell, the terminal device sends a CHO completion message to the base station to which the target handover cell belongs (i.e., the target base station) to notify the target base station that the conditional handover with the target base station is completed.
  • the base station to which the target handover cell belongs i.e., the target base station
  • Figure 4 shows the process of conditional switching of the terminal device.
  • the terminal device communicates with the source base station, and the source base station sends RRC reconfiguration information to the terminal device.
  • the RRC reconfiguration information includes measurement configuration information.
  • the terminal device measures the neighboring cell according to the measurement configuration information, and reports the measurement results to the source base station in the form of a measurement report.
  • the source base station determines the neighboring cells with better signal quality based on the measurement report, and sends CHO requests to candidate base station 1 and candidate base station 2 respectively belonging to the neighboring cells with better signal quality.
  • the source base station sends CHO configuration information to the terminal device.
  • the CHO configuration information includes candidate cell 1 to which candidate base station 1 belongs, candidate cell 2 to which candidate base station 2 belongs, and CHO triggering conditions corresponding to candidate cell 1 and candidate cell 2 respectively (such as , the CHO trigger condition is the signal quality threshold).
  • the terminal equipment determines that the signal quality with candidate cell 1 meets the CHO triggering condition, it initiates RACH to candidate base station 1. After the RACH is completed, the terminal equipment sends a CHO completion message to the candidate base station 1 to notify the candidate base station 1 that the conditional handover with the candidate base station 1 is completed.
  • MR-DC Multi-radio dual connectivity
  • primary base station master node, MN
  • secondary base station secondary node, SN
  • primary cell primary cell, Pcell
  • primary cell primary cell (primary) secondary cell, PSCell
  • primary cell group master cell group, MCG
  • secondary cell group secondary cell group, SCG
  • Multi-mode dual connection In a wireless network, a terminal device communicates with multiple network devices at the same time. MR-DC may also be called dual-connectivity (DC).
  • multiple network devices that communicate with the terminal device at the same time can be network devices belonging to the same radio access technology (RAT).
  • RAT radio access technology
  • the multiple network devices are all 4G base stations, or all are 5G.
  • Base station or, multiple network devices that communicate with the terminal device simultaneously may also be network devices of different RATs.
  • some of the network devices among the multiple network devices are 4G base stations, and the remaining network devices are 5G base stations.
  • the base station that interacts with the core network and control plane signaling is called the main base station MN, and other base stations connected to the terminal equipment are called secondary base stations SN.
  • the network equipment connected to terminal equipment 1 includes network equipment 1 and network equipment 2, and network equipment 1 is connected to the mobility management entity of the core network, and network equipment 1 and network equipment 2 are both connected to the service gateway.
  • the network device 1 is the main base station MN of the terminal device 1
  • the network device 2 is the secondary base station SN of the terminal device 1.
  • MR-DC there is a primary cell (Pcell) in the cell where the MN serves the terminal equipment, and there is a primary and secondary cell (PSCell) in the cell where the SN serves the terminal equipment.
  • the primary cell (Pcell) refers to a cell deployed at a primary frequency point, and the terminal device initiates an initial connection establishment process or a connection reestablishment process in the cell, or is indicated as the primary cell during the handover process.
  • the primary and secondary cell (PSCell) refers to the cell in which the terminal equipment initiates the random access process at the secondary base station, or the cell in which the terminal equipment skips the random access process to initiate data transmission during the secondary base station change process, or performs a synchronous reconfiguration process. The cell of the secondary base station that initiates random access.
  • Terminal equipment can receive services from multiple cells to which a base station belongs.
  • the cell group where the MN provides services to the terminal equipment is called the primary cell group (MCG)
  • MCG primary cell group
  • SCG secondary cell group
  • MCG and SCG each contain at least one cell.
  • the MCG contains only one cell the cell is the PCell of the terminal device.
  • the SCG contains only one cell the cell is the PSCell of the terminal device.
  • NR new radio
  • PCell and PSCell are called special cells (SpCell).
  • SpCell special cells
  • SCell secondary cells
  • a secondary cell refers to a cell operating on a secondary carrier.
  • FIG. 5 is a schematic diagram of the architecture of various cells in MR-DC.
  • the cell group serving the terminal device includes MCG and SCG.
  • MCG includes Pcell and other SCell
  • SCG includes PSCell and other SCell.
  • SCell and SpCell in the cell group perform carrier aggregation (CA), that is, the terminal equipment uses multiple cells (carriers) for uplink and downlink communication at the same time to support high-speed data transmission.
  • CA carrier aggregation
  • the terminal device when the terminal device detects a radio link failure (RLF) in the primary cell group, that is, when it detects a radio link failure in the link between the terminal device and the MN, the terminal device initiates an RRC connection resumption. Established to restore connection to MCG. However, when the terminal device re-establishes the RRC connection, it will cause long-term data interruption. For example, there is a data interruption of 90ms to 130ms.
  • RLF radio link failure
  • the fast MCG link recovery process refers to: when the terminal device detects that RLF occurs with the MCG, that is, when RLF occurs with the MN, it sends failure information to the MCG through the SN that the wireless link connection failure between the terminal device and the MCG fails, and Response information from the MN is received through the SN.
  • the response information includes cell information for the terminal device to access or switch to a cell.
  • the response information includes a handover (handover) message or an RRC rerelease (RRCRelease) message.
  • the terminal device can report MCG failure information to the SN through the split signaling radio bearer (SRB) 1 or SRB3, and start the T316 timer (timer). During the T316 timing, if the terminal device receives the response information sent by the MN through the SN, the terminal device performs the fast MCG link recovery process successfully. Otherwise, the terminal device fails the fast MCG link recovery process and the terminal device performs RRC connection re-establishment.
  • SRB split signaling radio bearer
  • SRB3 uses NR-dedicated control channel (dedicated control channel, DCCH) logical channel.
  • the scheduling priority of SRB3 is higher than the scheduling priority of all data radio bearers (DRB).
  • DRB data radio bearers
  • the default scheduling priorities of split SRB1 and SRB3 are the same, and the terminal device does not need to reorder RRC messages between SRB1 and SRB3.
  • the SN selects the encryption and integrity protection algorithm for SRB3 and provides it to the MN in the SCG configuration.
  • SN decided to establish SRB3,
  • the SN provides SRB3 configuration through SN RRC messages.
  • the establishment and release of SRB3 is completed in the secondary node addition and change process, and the SRB3 reconfiguration is completed in the secondary node modification process.
  • SRB3 is released when the connection between the end device and the SCG is released.
  • SRB3 can be used to send SN RRC Reconfiguration information, SN RRC Reconfiguration Complete information, SN Measurement Report, and SN failure information ( SN Failure Information), SN UE Assistance Information (SN UE Assistance Information) and SN IAB Other Information (SN IAB Other Information).
  • the SN RRC Reconfiguration Complete message and the message initiating the process are mapped to the same SRB.
  • SN Measurement Report messages are mapped to SRB3, if configured, regardless of whether the configuration is received directly from the SN or through the MN.
  • MN RRC messages are not mapped to SRB3.
  • SRB3 can be used by the terminal device to send the encapsulated MCG failure information message to the MN in the UL Information Transfer MR-DC message, and respond to receive the RRC reconfiguration, Mobility From NR encapsulated in the DL Information Transfer MRDC message. Command, RRC release messages.
  • SRB1 and SRB2 support split SRB, and SRB0 and SRB3 do not support split SRB.
  • the RRC protocol data unit (PDU) on Split SRB is encrypted and integrity protected through NR PDCP.
  • Split SRB is configured by the MN during the secondary node addition and change process, and the SN configuration part is provided by the SN.
  • the terminal device can be configured with split SRB1, split SRB2 and SRB3 at the same time.
  • the SCG branches of SRB3 and split SRB can be configured independently.
  • MRO Mobility robustness optimization
  • RLF report wireless link failure report
  • the MRO mechanism refers to: When a mobility-related abnormality occurs in the terminal device (such as terminal device handover failure, wireless link failure of the terminal device in the target cell, etc.), the network device reports mobility-related abnormal parameters to the network device. Carry out independent analysis, optimize network parameters, etc. based on the relevant abnormal parameters.
  • network equipment will adjust mobility parameters based on feedback from performance indicators.
  • Feedback from performance indicators can be through reports such as RLF report or successful handover report (SHR).
  • Mobility parameters are determined by Parameters used in the switching process, such as switching thresholds, etc.
  • the MRO mechanism can reduce problems such as premature handover, too late handover, and ping-pong handover caused by unreasonable network parameter settings such as same-frequency handover, inter-frequency handover, and inter-system handover.
  • RLF report includes but is not limited to one or more of the following information:
  • failed Pcell ID includes cell information where the terminal device detects RLF, or target cell information where handover failure (HOF) occurs.
  • Connection failure type includes failure types such as RLF occurring on the terminal device, or terminal device switching failure, or the timer started by the terminal device (such as the T312 timer started after sending the measurement report) expires.
  • Source primary cell identification (previous PCell ID).
  • previous PCell ID includes the source cell information of the last time the terminal device received a handover command.
  • Reestablish the cell ID includes cell information that initiates RRC connection re-establishment after the terminal device fails to connect.
  • time Conn Failure includes the time from the last time the terminal device received the HO command to the connection failure.
  • Time Since Failure includes the length of time recorded when the terminal device fails to connect, generally refers to the time from the terminal device failing to connect to RLF report.
  • rlf-Cause includes the reasons for wireless link failure of the terminal device or the reasons for handover failure.
  • rlf-Cause is T310 timeout, or random access problem (random Access Problem), or too many RLC retransmission failures, etc.
  • the above-mentioned cell information may include CGI, and/or PCI and frequency.
  • the RLF report may also include the cell quality of each cell, such as the cell quality of the failed cell and/or neighboring cells when link failure is detected.
  • the cell information may also include the measurement results of the cell.
  • the first network device is the network device to which the primary cell group to which the terminal device access belongs.
  • the first network device can also be regarded as the source primary base station (source MN) of the terminal device.
  • the second network device is the network device to which the secondary cell group to which the terminal device is connected belongs.
  • the second network device may also be
  • the network equipment is regarded as the secondary base station (SN) of the terminal equipment.
  • the third network device is a network device in which the terminal device fails to access the cell and then re-accesses successfully based on the first response information sent by the first network device, or a network device in which the terminal device fails to perform recovery based on conditional handover and then re-accesses successfully.
  • the third network device can be understood as a network device that successfully re-establishes the RRC connection after the terminal device fails to access the cell based on the first response information sent by the first network device; or it can be understood that the terminal device fails to re-establish the RRC connection.
  • the network device to which the successfully accessed cell belongs or it can be understood as the terminal performing conditional handover-based restoration of the network device with successful access, or it can be understood as the terminal device performing the resumption of access to the network device.
  • the network device successfully re-establishes the RRC connection; or it can be understood that after the terminal device fails to recover based on the conditional handover, and after the RRC connection re-establishment fails, it returns to the idle state. Perform cell selection and access the network equipment to which the successful cell belongs.
  • the third network device can also be regarded as the target MN for which the terminal device successfully restores access based on conditional handover, or the target MN for which the RRC connection re-establishment is successful, or the terminal device fails to re-establish the RRC connection.
  • Cell selection the target MN to which the successfully accessed cell belongs.
  • the fourth network device is the network device to which the accessed cell belongs when the terminal device performs cell selection and the selected cell is one of the candidate cells configured in the first conditional handover configuration information and successfully accesses the selected cell.
  • FIG. 6 is an interactive schematic diagram of the communication method 100.
  • the communication method 100 is explained from the perspective of interaction between a terminal device, a first network device, and a second network device.
  • the communication method 100 includes but is not limited to the following steps:
  • the terminal device sends first failure information to the second network device, where the first failure information includes first conditional handover configuration information.
  • the second network device receives the first failure information from the terminal device.
  • the failure of the wireless link between the terminal device and the first network device can be understood as a wireless link failure in the link between the terminal device and the first network device, or it can be understood as a disconnection between the terminal device and the primary cell group. connection. After the wireless link between the terminal device and the first network device fails, the connection between the terminal device and the secondary cell still exists, so that the terminal device can send the first failure information to the second network device to which the secondary cell belongs, so that The second network device forwards the first failure information of the terminal device to the first network device.
  • the first failure information is failure information that a wireless link failure (radio link failure, RLF) occurs between the terminal device and the first network device.
  • the first failure information may be sent by the terminal device to the second network device in the form of a wireless link failure report (RLF report), so that the first failure information includes but is not limited to the information included in the above-mentioned RLF report.
  • the first failure information includes failed Pcell ID, and the failed Pcell ID is recorded as the cell ID of the primary cell in the primary cell group.
  • the first failure information includes connection failure type, and the connection failure type is recorded as the terminal device performing conditional switching too late.
  • the first failure information also includes first conditional handover configuration information, which is configured by the first network device to the terminal device when the signal quality between the first network device and the terminal device is greater than a preset threshold.
  • the first conditional handover configuration information includes one or more candidate cells, a radio air interface configuration of each cell in the one or more candidate cells, and a handover execution triggering condition for each cell.
  • the terminal device when a wireless link failure occurs between the terminal device and the first network device, the terminal device sends the first failure information to the second network device, so that the second network device forwards the received first failure information to the first network device. equipment.
  • the second network device sends the first failure information to the first network device.
  • the first network device receives the first failure information from the second network device.
  • the first failure information carrying the first conditional handover configuration information is reported to the first network device through the second network device.
  • This method not only allows the first network device to obtain relevant information about the wireless link failure between the terminal device and the first network device, but also facilitates the first network device's subsequent conditional handover configuration information for the terminal device based on the first conditional handover configuration information. Optimization.
  • the first network device sends first response information to the second network device, where the first response information includes first indication information or the cell identity of the first cell.
  • the second network device receives the first response information from the first network device.
  • the first indication information is used to instruct the terminal device to select a cell to access from the candidate cells configured with the first conditional handover configuration information.
  • the first cell is the cell to be switched by the terminal device and is a candidate configured with the first conditional handover configuration information.
  • the cell to be switched refers to the target switching cell of the terminal equipment, that is, the first cell is the target switching cell of the terminal equipment and is a cell among the candidate cells configured by the first conditional switching configuration information.
  • the first indication information can also be understood as CHO based recovery information to instruct the terminal device to select the cell to be accessed from the candidate cells configured by the first conditional handover configuration information.
  • the first indication information is used to instruct the terminal device to switch the candidate cell configured by the configuration information from the first condition.
  • Select the access cell and/or conditional handover configuration identifier That is to say, the first indication information is used to instruct the terminal device to select the access cell and the corresponding wireless air interface configuration from the candidate cells configured by the first conditional handover configuration information, or to indicate the conditional handover configuration identifier, or to Instruct the terminal device to use the conditional switching configuration as the first conditional switching configuration information.
  • the first network device counts a first delay
  • the first delay is an average inter-site interaction delay between the first network device and the second network device.
  • delay is defined as: the time difference between sending a message and receiving the corresponding response message. That is to say, the first delay may be from the first network device sending the secondary station add/modify/release/change request information to the second network device to receiving the response information from the second network device such as secondary station add/modify/ The time difference between release/change request acknowledgment messages.
  • the average interaction delay between stations can be the Xn port delay, the X2 port delay, or the delay based on the NG port and/or S1 port.
  • the Xn port is the communication interface between NR sites
  • the X2 port is the communication interface between NR sites and LTE sites. If there is no Xn port and X2 port, the communication between the two sites is forwarded through the NG (NR site ⁇ ->NR core network) and/or S1 port (4G core network ⁇ ->LTE site) of the core network. communication.
  • the first network device counts the average inter-site interaction delay between the first network device and the second network device. Therefore, the first network device can obtain the first delay measurement information. This facilitates the first network device to determine, based on the first delay measurement information, whether the cause of the failure of the terminal device to perform fast link recovery is the connection between the first network device and the second network device when the terminal device fails to perform fast link recovery.
  • the average interaction delay i.e. the first delay
  • the first network device determines that the reason why the terminal device fails to perform fast link recovery may be that the first delay is too large, and configures it reasonably based on the first delay measurement information.
  • the T316 threshold reduces the probability of failure of terminal equipment to perform fast link recovery.
  • the second network device sends the first response information to the terminal device.
  • the terminal device receives the first response information from the second network device.
  • the first network device after receiving the first failure information, sends the first response information to the terminal device through the second network device.
  • the first response message includes first indication information or the cell identity of the first cell, so that the terminal device can access the cell selected from the candidate cells configured in the first conditional handover configuration information based on the first indication information, or directly access the first cell.
  • Cell switching When the terminal device selects a cell to access from the candidate cell configured in the first conditional handover configuration information based on the first indication information, it selects the cell to access from the candidate cell configured in the first conditional handover configuration information based on the cell selection principle.
  • Cell selection principles include signal quality thresholds. For example, when the terminal device satisfies the signal quality threshold for cell selection among the candidate cells configured in the first conditional handover configuration information, the terminal device uses its candidate cell as the cell to which the terminal device wants to access.
  • the terminal device After receiving the first response, the terminal device performs cell access or cell switching according to the first response information.
  • the terminal device accesses or switches a cell according to the first response information
  • the cell to be accessed or the cell to be switched is one of the candidate cells configured by the first condition switching configuration information, thereby improving the efficiency of the terminal device to access or switch the cell.
  • the success rate is conducive to the timely access of the terminal device to the cell among the candidate cells configured with the first conditional handover configuration information, and is conducive to the rapid recovery of the wireless link between the terminal device and the main cell group.
  • the first response message includes first indication information.
  • the first indication information is used to instruct the terminal device to select an access cell and corresponding wireless air interface configuration from the candidate cells configured by the first conditional handover configuration information. Directly select the cell to be accessed from the candidate cells configured with the first condition handover configuration information, and use the corresponding wireless air interface configuration to access the selected cell.
  • the first response message includes first indication information
  • the first indication information is used to indicate the conditional switching configuration identifier
  • the terminal device determines the first conditional switching configuration information corresponding to the conditional switching configuration identifier according to the conditional switching configuration identifier, And select a cell to access among the candidate cells configured with the first conditional handover configuration information, and access the selected cell.
  • the first response information includes first indication information.
  • the terminal device can also directly switch from the first conditional switching configuration information. Select a cell to access from the configured candidate cells and access the selected cell.
  • the terminal device if the terminal device fails to access the first cell or the second cell, or if the terminal device successfully accesses the first cell or the second cell and a wireless link failure occurs within a preset time period, the terminal device performs radio resource control. Connection re-establishment (RRC connection re-establishment).
  • the second cell is a cell that the terminal device selects to access based on the first indication information, that is, a cell to be accessed that the terminal device selects among the candidate cells configured in the first conditional handover configuration information based on the first indication information.
  • the failure of the terminal device to access the first cell or the second cell means that the terminal device has not accessed the first cell or the second cell. If the terminal equipment fails to access the first cell or the second cell, it may be that the selected cell is inappropriate when selecting the cell to access or switch from the cells configured with the first conditional handover configuration information, or it may be that the first conditional handover configuration information The configured candidate cells are unreasonable.
  • the terminal device successfully accesses the first cell or the second cell and a wireless link failure occurs within a preset time period, it indicates that the terminal device has successfully accessed the first cell or the second cell, but a wireless link failure occurred within a relatively short period of time. . However, if the terminal device successfully accesses the first cell or the second cell and a wireless link failure occurs within a preset time period, it is also considered that the terminal device has not successfully accessed the cell, that is, the terminal device has not established a connection with the target network device.
  • the terminal device fails to access the first cell or the second cell, or when the terminal device successfully accesses the first cell or the second cell and a wireless link failure occurs within a preset time period, the RRC connection is re-established, so as to Try to access the target cell through RRC connection re-establishment and restore the wireless link with the primary cell group.
  • the terminal device may also record second failure information, and sending a failure report to the third network device, where the failure report includes the second failure information.
  • the third network device may receive the failure report from the terminal device and forward the failure report to the first network device. The first network device thereby receives the failure report from the third network device.
  • the second failure information includes the message indication type of the first response message, and also includes the terminal device failing to access the first cell or the second cell according to the first response message, or the terminal device successfully accessing the first cell or the second cell and in A wireless link failure occurs within the preset time period.
  • the message indication type of the first response message indicates that the first response message includes first indication information or a cell identity of the first cell.
  • the message indication type of the first response message may be to implicitly indicate in a bit manner that the first response information includes the first indication information or the cell identity of the first cell. For example, when the bit used to indicate the message indication type of the first response message is 0, it indicates that the first response message includes the first indication information; when the bit used to indicate the message indication type of the first response message is 1, it indicates the first The response message includes the cell identity of the first cell. On the contrary, when the bit used to indicate the message indication type of the first response message is 0, it may also indicate that the first response message includes the cell identity of the first cell, and the bit used to indicate the message indication type of the first response message is 1. When , it may also be indicated that the first response information includes the first indication information.
  • the embodiments of this application do not limit the specific implicit indication method.
  • the message indication type of the first response message may also be a direct indication, indicating that the first response message includes the first indication information or the cell identity of the first cell.
  • the message indication type of the first response message is directly indicated by means of fourth indication information.
  • the fourth indication information is used to indicate that the first response information includes the first indication information, or the fourth indication information is used to indicate the cell of the first cell. logo.
  • the second failure message also includes that the terminal device fails to access the first cell or the second cell, or the terminal device successfully accesses the first cell or the second cell and a wireless link occurs within a preset time period, which means that the second failure message also includes the terminal device.
  • the reason why the device failed to access the target cell according to the first response message includes but is not limited to the relevant parameter information in the above RLF report, which will not be described again.
  • the third network device is a network device to which the terminal device successfully reconnects. Therefore, the terminal device reports the failure report carrying the second failure information to the first network device through the third network device, so that the first network device obtains the failure reason why the terminal device fails to access the target cell according to the first response information.
  • the second failure information further includes second indication information, and the second indication information is used to instruct the terminal device that the cell in which the first response message is received is the primary cell in the primary cell group.
  • the first response message is the last message received before the terminal device records the second failure information.
  • the second failure information may include the source cell information of the last command/message received by the terminal device.
  • the last message received before the terminal device records the second failure information is the first response message, and the first response message is sent by the first network device to the terminal device through the second network device, that is, the terminal device receives the first response message.
  • the source cell is the primary cell in the primary cell group. Therefore, the second failure information also includes second indication information to report to the first network device through the second indication information that the last first response message received by the terminal device before recording the second failure information came from the primary cell in the primary cell group. .
  • the terminal device directly records the previous PCell ID in the second indication information as the cell ID of the primary cell in the primary cell group to instruct the terminal device to record the source of the last message received before the second failure information.
  • the cell is the primary cell in the primary cell group.
  • the terminal device records the previous PCell ID in the second indication information as the cell identifier of the secondary cell in the secondary cell group according to the recording method in the current protocol, and adds a new information element, such as a new Add the cell ID of the actual primary cell (previous Actual PCell Id), and record the previous Actual PCell Id as the cell ID of the primary cell in the primary cell group. That is to say, the terminal device instructs the terminal device through the previous PCell ID that the last message received before recording the second failure information was received from the secondary cell in the secondary group, and instructs the terminal device through the previous Actual PCell Id that the last message received before the second failure information is recorded The message received at one time actually originates from the primary cell in the primary cell group.
  • a new information element such as a new Add the cell ID of the actual primary cell (previous Actual PCell Id)
  • the terminal device can flexibly instruct the terminal device in the second indication information through the above two methods that the last first response message received before recording the second failure information comes from the primary cell in the primary cell group.
  • the first network device may also associate the first failure information with the failure report.
  • the first network device associates the first failure information and the failure report, which may mean that the first network device uses the same identifier to identify the first failure information and the failure report, so that the cause of the wireless link failure of the terminal device can be subsequently analyzed. , analyzed based on the first failure information and failure report marked with the same identification.
  • the first network device associates the first failure information with the failure report, which may also mean that the first network device records the first failure information in the failure report, obtains the associated failure report, or records the failure report in the failure report.
  • the first network device analyzes the cause of the wireless link failure of the terminal device based on the post-association failure report or the post-association failure information.
  • the embodiments of the present application do not limit the manner in which the first network device associates the first failure information with the failure report. That is, the manner in which the first network device associates the first failure information with the failure report includes but is not limited to the above two methods.
  • the first failure information includes a failure of the terminal device to access the first cell or the second cell according to the first response information, indicating that the terminal device has not successfully accessed the first cell or the second cell. If the serving cell has not changed, then the cell radio network temporary identifier (RNTI) of the terminal device is still the RNTI of the primary cell. Therefore, the terminal device can associate the first failure information and the failure report based on the principle that the first failure information and the failure report carry the same RNTI, and the failure report is the failure report closest to the recording time of the first failure information.
  • RNTI cell radio network temporary identifier
  • the second failure information includes that when the terminal device fails to access the first cell or the second cell according to the first response message, the cell wireless network temporary identity carried in the failure report is the same as the cell wireless network temporary identity carried in the first failure information. , and the failure report is the failure report closest to the recording time of the first failure information.
  • the second failure information includes that the terminal device successfully accesses the first cell or the second cell according to the first response message and a wireless link failure occurs within a preset time period, indicating that the terminal device succeeds in accessing the first cell or the second cell according to the first response message. If the response information has successfully accessed the first cell or the second cell, then the serving cell of the terminal device has changed, that is, the RNTI of the terminal device has also changed. However, the first conditional handover configuration information of the terminal device has not changed, and the candidate cell configured by the first conditional handover configuration information has not changed, then the terminal device can determine whether the cell corresponding to the cell identifier of the candidate cell carried in the failure report is the first. A cell among the candidate cells configured by the conditional handover configuration information, and the principle that the failure report is the failure report closest to the recording time of the first failure information associates the first failure information with the failure report.
  • the second failure information includes the cell corresponding to the candidate cell identity carried in the failure report when the terminal device successfully accesses the first cell or the second cell according to the first response message and a wireless link failure occurs within a preset time period. It is a cell among the candidate cells configured by the first conditional handover configuration information in the first failure information, and the failure report is the failure report closest to the recording time of the first failure information.
  • the first network device associates the first failure information with the failure report, which enables the first network device to optimize the conditional switching configuration information of the terminal device based on the associated information.
  • the reason for the wireless link failure between the terminal device and the first network device included in the first failure information is that the terminal device performed a CHO to the third cell too late
  • the second failure information carried in the failure report includes the terminal device receiving the response information based on the response information. If entry into the first cell fails, the candidate cells configured by the first conditional handover configuration information include cell a, cell b, and cell c. If both the first cell and the third cell are cell a, it indicates that cell a may be an unreasonable candidate cell configured by the first network device.
  • the first network device can configure cell a when optimizing the conditional switching configuration information of the terminal device. Delete from the candidate cells configured by the first conditional handover configuration information. If the third cell is cell a and the first cell is cell c, it indicates that the CHO triggering condition of cell a configured in the first condition switching configuration information may be unreasonable, resulting in poor signal quality between the terminal device and the first network device. , CHO to cell a has not yet been triggered, so the first network device can modify the CHO triggering condition of cell a in the first conditional handover configuration information. In addition, cell c may not be a reasonable candidate cell, and cell c may be deleted from the first conditional handover configuration information.
  • the second network device can also collect statistics on the second delay and the third delay.
  • the second delay is the average inter-site interaction delay between the second network device and the first network device in exchanging the first failure information and the first response information, or is the average inter-site interaction delay between the second network device and the first network device.
  • time delay may be from sending the first failure message from the first network device to the second network device, or from the secondary station adding/modifying/releasing/changing request information to receiving the first failure message from the second network device.
  • Response information or the time difference between secondary station add/modify/release/change request confirmation messages.
  • the third delay is the average air interface interaction delay between the second network device and the terminal device when the first failure information and the first response information are exchanged, or the average air interface interaction delay between the second network device and the terminal device.
  • the third delay is the average air interface interaction delay. It is divided into uplink delay and downlink delay.
  • the uplink delay includes two segments, such as D1 segment and D2 segment. The D1 segment is reported by the terminal device, and the D2 segment is collected by the second network device.
  • the second delay can be understood as the time difference between the second network device sending the first failure information to the first network device and receiving the first response information from the first network device, or it can be understood as the time difference from the second network device sending the first failure information to the first network device.
  • the time difference between a network device sending a message including but not limited to secondary station add/modify/release/change request information, and receiving corresponding response information from a second network device.
  • the third delay can be understood as the time difference from the terminal device sending the first failure information to the second network device to the second network device receiving the first failure information, or it can be understood as the time difference from the second network device to the terminal device.
  • the time difference between sending the first response information and the terminal device receiving the first response information can also be the uplink delay and downlink delay of the control plane signaling between the terminal device and the second network device.
  • the existing user plane can be directly adopted.
  • the uplink delay and downlink delay results of data packets are the granular delay statistics results of each data wireless bearer of each terminal device. You can also refer to the statistical method of user plane data packets to count the uplink delay and downlink delay of control plane signaling according to the granularity of each signaling wireless bearer of each terminal device.
  • the second network device counts the second delay and the third delay, so that the second network device can obtain the second delay measurement information and the third delay measurement information, which is beneficial to the second network device to the third delay.
  • a network device sends the second delay measurement information and the third delay measurement information, This further facilitates the first network device to determine whether the terminal device performs fast link recovery based on the second delay in the second delay measurement information and the third delay in the third delay measurement information respectively when the terminal device fails to perform fast link recovery.
  • Reason for fast link recovery failure For example, if the second delay is greater than the first preset value, the first network device determines that the reason why the terminal device fails to perform fast link recovery may be that the second delay is too large. For another example, if the third delay is greater than the second preset value, the first network device determines that the reason why the terminal device fails to perform fast link recovery may be that the third delay is too large.
  • the first network device After obtaining the second delay measurement information and/or the third delay measurement information, the first network device reasonably configures the T316 threshold based on the second delay measurement information and/or the third delay measurement information to reduce the terminal device's execution speed. The probability of link recovery failure.
  • the first network device is the source MN of the terminal device
  • the second network device is the SN of the terminal device
  • the third network device and the fourth network device are both network devices to which the candidate cells configured by the first conditional handover configuration information belong, They are MN-A1 and MN-A2 respectively.
  • the interaction process between the terminal device, source MN, SN, MN-A1 and MN-A1 in the communication method 100 is introduced in detail.
  • Figure 7 is an interaction flow chart between the terminal device, source MN, SN, MN-A1, and MN-A1. As shown in Figure 7, the interaction between the terminal device, source MN, SN, MN-A1, and MN-A1 includes the following steps:
  • S11 Source MN and SN interactive fast recovery process.
  • the MN can interact with the SN through the split SRB1 or SRB3 fast recovery process.
  • the fast recovery process means that after the wireless link failure occurs between the terminal device and the source MN, the terminal device can interact with the source MN through the SN.
  • the source MN configures the fast recovery process to the terminal device.
  • the MN configures the fast recovery process to the terminal device, that is, sends fast recovery reconfiguration information to the terminal device so that the terminal device can subsequently perform the fast recovery process. That is, after the wireless link failure occurs between the terminal device and the source MN, it can communicate with the source MN through the SN. Information exchange between source MNs.
  • the source MN interacts with the handover procedure (handover procedure) with MN-A1 and MN-A2 respectively, that is, the source MN sends handover requests to MN-A1 and MN-A2 respectively to request that the terminal device can send messages to MN-A1 and MN-A1.
  • the source MN receives the confirmation information sent by MN-A1 and MN-A2 respectively, it indicates that the terminal device can subsequently perform conditional handover to MN-A1 and MN-A1.
  • the source MN sends RRC reconfiguration information to the terminal device, so as to configure the first conditional handover configuration information to the terminal device through the RRC reconfiguration information.
  • the first conditional handover configuration information includes cell identities to which MN-A2 and MN-A3 belong, and CHO triggering conditions corresponding to the cells to which MN-A2 and MN-A3 belong respectively.
  • the terminal device detects a wireless link failure with the source MN, that is, a wireless link failure (MCG RLF) with the MCG.
  • MCG RLF wireless link failure
  • Wireless link failure between the terminal device and the source MN may be caused by the terminal device performing CHO too late.
  • the terminal device sends MCG failure information (that is, the first failure information) to the SN.
  • MCG failure information that is, the first failure information
  • the SN forwards MCG failure information to the source MN.
  • the MCG failure information includes the first condition switching configuration information.
  • MCG failure information does not include the first condition switching configuration information.
  • the source MN sends an RRC reconfiguration message (ie, the first response message) to the SN, where the RRC reconfiguration message includes the first indication information or the cell identity of the first cell.
  • the SN forwards the RRC reconfiguration message to the terminal device, and the terminal device receives the RRC reconfiguration information from the SN.
  • the RRC reconfiguration message does not include the first indication information or the cell identity of the first cell, including legacy HO CMD or legacy RRC release.
  • legacy HO CMD is a handover command sent by the source MN to the terminal device after the source MN selects a suitable cell to initiate a handover request. After the target MN responds to the handover request.
  • the terminal device performs switching and data forwarding based on the switching command.
  • legacy RRC release is the RRC connection release information sent by the source MN to the terminal device. After receiving the legacy RRC release, the terminal device performs cell reselection. After confirming that there is a new cell that meets the cell reselection conditions, the terminal device attempts to camp in the new cell.
  • the terminal device When the terminal device receives the RRC reconfiguration message from the source MN, it indicates that the fast recovery process of the terminal device is successful.
  • MN-A1 is the first cell, or an access cell selected from the candidate cells configured by the first conditional handover configuration information based on the first indication information. That is to say, the terminal device fails to access the target cell according to the RRC reconfiguration information.
  • the terminal device records the second failure information that fails to access MN-A1 based on the RRC reconfiguration information, or successfully accesses MN-A1 and a wireless link failure occurs within a preset time period, and passes it to MN-A2 Report a failure report to the source MN, where the failure report includes second failure information.
  • the second failure information also includes third indication information, and the third indication information is used to instruct the terminal device to fail according to the first response message.
  • the successfully accessed cell is one of the candidate cells configured in the first conditional handover configuration information, that is, a cell that indicates that the terminal device fails to access, or a cell where the access is successful and a wireless link failure occurs within a preset time period, whether A cell among the candidate cells configured for the first conditional handover configuration information.
  • the terminal device can also report to the first network device through a failure report whether the cell where the access failed is one of the candidate cells configured by the first conditional handover configuration information, thereby facilitating the first network device to determine the first conditional handover.
  • the candidate cell configured by the configuration information is a suitable cell, or whether the CHO triggering condition of the candidate cell configured by the first conditional handover configuration information is suitable.
  • the previous PCell ID recorded in the first failure information is the cell identifier of the primary cell to which the source MN belongs.
  • the previous PCell ID recorded in the first failure information is the cell ID of the secondary cell to which the SN belongs, and the first failure information also records the previous Actual PCell Id, and the previous Actual PCell Id is recorded as the primary cell to which the source MN belongs. Community ID.
  • the source MN associates the first failure information with the failure report.
  • the association method can be found in the above-mentioned S104, which will not be described again.
  • the terminal device may receive an instruction to switch the configuration from the first condition when the wireless link between the terminal device and the first network device is restored.
  • the cells in the candidate cells configured by the conditional handover configuration information are conducive to quickly restoring the wireless link between the terminal device and the primary cell group.
  • the first failure information reported to the first network device includes the first conditional switching configuration information, which is conducive to the first network device subsequently based on the first failure information. Optimizing the conditional handover configuration information of the terminal device can reduce the number of late conditional handovers, thereby reducing the probability of wireless link failure between the terminal device and the first network device.
  • the embodiment of the present application also provides a communication method 200.
  • Figure 8 is an interactive schematic diagram of the communication method 200.
  • the communication method 200 is also explained from the perspective of interaction between the terminal device, the first network device, and the second network device.
  • the communication method 200 includes but is not limited to the following steps:
  • the terminal device sends the first failure information and the third failure information. Recorded in the first radio link failure report.
  • the first failure information is information that a wireless link failure occurs between the terminal device and the first network device
  • the third failure information is information that the terminal device fails to perform fast link recovery.
  • the first timer is started when the terminal device detects a failure of the wireless link with the first network device.
  • the running time of the first timer may be configured by the first network device for the terminal device, or may be preset by the terminal device itself.
  • the first failure information includes information related to the wireless link failure between the terminal device and the first network device. That is, the first failure information includes but is not limited to the relevant parameters in the above RLF report.
  • the first failure information may also include first conditional switching configuration information.
  • the first conditional handover configuration information is configured by the first network device for the terminal device and is used to perform conditional handover related information. When the first failure information includes the first conditional switching configuration information, it is beneficial for the first network device to subsequently optimize the conditional switching configuration information of the terminal device.
  • the third failure information includes information related to the fast link recovery failure between the terminal device and the first network device. That is, the third failure information also includes but is not limited to the relevant parameters in the above RLF report.
  • the third failure information may also include one or more of the following: indication information indicating whether the terminal device fails to perform fast link recovery, the timeout reason of the third timer, and the reason for the wireless link failure in the secondary cell group. , the secondary cell group is deactivated.
  • the third timer is the T316 timer.
  • the third failure information includes one or more of the above, it is beneficial for the first network device to determine the reason why the terminal device failed to perform fast link recovery based on the content of the third failure information after receiving the third failure information.
  • the terminal device When the terminal device detects that the wireless link with the first network device fails, that is, when the wireless link with the MCG fails, the terminal device starts the first timer and performs communication with the first network device. Fast link recovery. The terminal device performs fast link recovery with the first network device, which means that the terminal device reports the first failure information when the wireless link with the first network device fails to the first network device through the second network device, After receiving the first failure information, the first network device forwards the first response information to the terminal device through the second network device, and the terminal device receives the first response information from the second network device.
  • the first response information may be one of the following information: first indication information, cell identity of the first cell, legacy HO CMD, legacy RRC release.
  • the first indication information is used to instruct the terminal equipment to select an access cell and/or a conditional handover configuration identifier from the candidate cells configured in the first conditional handover configuration information.
  • the first cell is the cell to be switched for the terminal device and is one of the candidate cells configured with the first conditional handover configuration information. and/or is a cell among the candidate cells configured by the first conditional handover configuration information corresponding to the conditional handover configuration identifier, and the cell to be switched is also a target handover cell.
  • the first indication information, the cell identity of the first cell, legacy HO CMD, and legacy RRC release can all be found in the above-mentioned communication method 100, and will not be described again.
  • the fast link recovery between the terminal device and the first network device refers to the above-mentioned fast MCG link recovery process, and the specific process will not be described again. If the fast link recovery between the terminal device and the first network device fails, it may be that the terminal device fails to send the first failure information to the first network device, or the terminal device does not receive the first response information from the first network device. . Wherein, the terminal device does not successfully send the first failure information to the first network device. It may be that the terminal device fails to send the first failure information to the second network device. Therefore, the second network device cannot forward the first failure information to the first network device.
  • the terminal device successfully sent the first failure information to the second network device, but the second network device failed to forward the first failure information to the first network device. If the terminal device does not receive the first response information from the first network device, it may be that the first network device fails to send the first response information to the second network device, so that the second device cannot forward the first response information to the terminal device, or It may be that the first network device successfully sent the first response information to the second network device, but the second network device failed to forward the first response information to the terminal device, so the terminal device did not receive the first response information.
  • the fast link recovery between the terminal device and the first network device fails during the first timer, it indicates that the fast link recovery between the terminal device and the first network device fails, and the fast link recovery between the terminal device and the first network device fails.
  • the first failure information and the second failure information are recorded in the same wireless link failure report (i.e., the first wireless link failure report) to benefit the first
  • the network device may jointly analyze, based on the first wireless link failure report, the cause of wireless link failure between the terminal device and the first network device and the failure of fast link recovery with the first network device.
  • this method is beneficial to ensuring the failure information.
  • the integrity of the record will further help improve the reliability of the first network device in analyzing related causes.
  • the terminal device When the terminal device records the first failure information and the third failure information in the same wireless link failure report, in order to distinguish the first failure information and the third failure information, different identifiers may be used in the first wireless link failure report. Record the first failure information and the third failure information.
  • the first failure information recorded in the first wireless link failure report includes: first failed PCell Id, first connection Failure Type, first previous PCell Id, first rlf-Cause, etc., in the first wireless link failure report
  • the recorded third failure information includes: second failed PCell Id, second connection Failure Type, second previous PCell Id, second rlf-Cause, etc. It can be seen that the first failure information and the third failure information can be distinguished by the first and second identifiers in the first wireless link failure report.
  • the first timer is started, and fast link recovery with the first network device is performed. If the first timer times out and the fast link recovery between the terminal device and the first network device fails, it means that the terminal device does not communicate with the third network device until a long time after the wireless link failure occurs between the terminal device and the first network device.
  • the fast link recovery between a network device fails. It is possible that the cause of the failure of the fast link recovery between the terminal device and the first network device is closely related to the cause of the failure of the wireless link between the terminal device and the first network device. small, so the terminal device records the first failure information and the third failure information separately, that is, the first failure information is recorded in the second wireless link failure report, and the third failure information is recorded in the third wireless link failure report.
  • the terminal device when the fast link recovery with the first network device fails, the terminal device records the third failure information in the third wireless link failure report and also records the first failure information in the second wireless link failure report.
  • the first failure information is not discarded, thereby ensuring the integrity of the failure information, which is beneficial to improving the reliability of the first network device in analyzing related causes.
  • the terminal equipment After S201 or S202, the terminal equipment performs cell selection.
  • the terminal equipment When the cell selected by the terminal equipment is one of the candidate cells configured with the first conditional handover configuration information, the terminal equipment performs conditional handover-based recovery (CHO based recovery), that is, to select community access. If the terminal device successfully accesses the selected cell, the network device to which the accessed cell belongs is the fourth network device. That is to say, the fourth network device is a network device to which the terminal device successfully accesses after detecting that the wireless link with the first network device fails and the fast link recovery with the first network device fails.
  • conditional handover-based recovery CHO based recovery
  • the terminal device may also send the first wireless link failure report to the fourth network device.
  • the fourth network device forwards the first wireless link failure report to the first network device, and the first network device obtains the first wireless link failure report. Therefore, the first network device can jointly analyze the reasons for wireless link failure between the terminal device and the first network device and the failure of fast link recovery with the first network device based on the first wireless link failure report.
  • the terminal device may also send the second wireless link failure report to the fourth network device.
  • radio link failure report or third radio link failure report It can be understood that the wireless link failure report sent by the terminal device is the latest wireless link failure report saved by the terminal device. That is, if the latest wireless link failure report saved by the terminal device is the second wireless link failure report, then the wireless link failure report sent by the terminal device is the second wireless link failure report.
  • the fourth network device sends a second wireless link failure report. If the latest wireless link failure report saved by the terminal device is a third wireless link failure report, then sends a third wireless link failure report to the fourth network device.
  • the fourth network device forwards the second wireless link failure report or the third wireless link failure report to the first network device. Therefore, the first network device can analyze the cause of the wireless link failure between the terminal device and the first network device according to the second wireless link failure report or the third wireless link failure report, and the reasons for the failure of fast link recovery with the first network device. reason.
  • the terminal device when the terminal device fails to perform conditional handover recovery using the third cell, it determines the recording method of the first failure information, the third failure information, and the fourth failure information according to the second timer.
  • the third cell is obtained through cell selection after the terminal device detects the failure of the wireless link with the first network device and the failure of fast link recovery with the first network device and is the first conditional handover configuration. Cells among the candidate cells configured with information.
  • the fourth failure information is information that the terminal equipment fails to perform conditional handover recovery using the third cell.
  • the fourth failure information includes but is not limited to the relevant parameters included in the above-mentioned RLF report.
  • the second timer is started when the terminal device detects that the fast link recovery with the first network device fails.
  • the running time of the second timer may be configured by the first network device for the terminal device, or may be preset by the terminal device.
  • the terminal device when the fast link recovery with the first network device fails, the terminal device starts the second timer and performs cell selection. If the third cell selected by the terminal device is the cell configured for the first conditional handover, recovery based on conditional handover is performed. When the terminal device fails to perform conditional handover recovery using the third cell during the second timer period, the terminal device determines the recording method of the first failure information, the third failure information, and the fourth failure information according to whether the second timer times out. .
  • the following describes the recording method in which the terminal device determines the first failure information, the third failure information, and the fourth failure information based on the second timer based on the recording method of the first failure information and the second failure realization:
  • Case 1 When the first failure information and the third failure information are recorded in the first wireless link failure report, the recording method of the first failure information, the third failure information, and the fourth failure information.
  • the terminal device determines the recording method of the first failure information, the third failure information and the fourth failure information according to the second timer, including: if If the second timer does not expire, the fourth failure information is recorded in the first wireless link failure report; if the second timer times out, the fourth failure information is recorded in the fourth wireless link failure report.
  • the terminal device records the first failure information and the third failure information. information and the fourth failure information are both recorded in the first wireless link failure report. If the second timer times out and the terminal equipment fails to use the third cell to perform conditional handover recovery, it indicates that the reason why the terminal equipment fails to use the third cell to perform conditional handover recovery may be between the first failure information and the third failure information. The correlation is weak, so the terminal device records the fourth failure information separately in the fourth wireless link failure report.
  • the terminal device When the terminal device records the first failure information, the third failure information and the fourth failure information in the first wireless link failure report, different identifiers may be used to record the first failure information, the third failure information and the fourth failure information.
  • the first failure information recorded in the first wireless link failure report includes: first failed PCell Id, first connection Failure Type, first previous PCell Id, first rlf-Cause, etc.
  • the first failure information recorded in the first wireless link failure report includes: second failed PCell Id, second connection Failure Type, second previous PCell Id, second rlf-Cause.
  • the fourth failure information recorded in the first wireless link failure report includes: third failed PCell Id, third connection Failure Type, third previous PCell Id, second rlf-Cause, etc.
  • the terminal device may also send the first wireless link failure report to the third network device.
  • the third network device sends the first wireless link failure report to the first network device.
  • the first network device receives the first wireless link failure report from the third network device, and determines the second conditional handover configuration information of the terminal device according to the first wireless link failure report.
  • the third network device is a network device to which the terminal device successfully reconnects after recovery failure based on conditional handover.
  • the terminal device determines the second conditional handover configuration information of the terminal device based on the first wireless link failure report, which refers to optimizing the conditional handover configuration information of the terminal device based on the first wireless link failure report to reduce occurrences between the terminal device and the first network device.
  • the probability of wireless link failure reduces the probability of terminal equipment accessing the cell, and reduces the probability of terminal equipment failure to perform condition-based handover recovery.
  • the terminal device may also send a message to the third network device.
  • First radio link failure report or fourth radio link failure Failure report The wireless link failure report sent by the terminal device is the latest wireless link failure report saved by the terminal device.
  • the third network device sends the first wireless link failure report or the fourth wireless link failure report to the first network device.
  • the first network device receives the first wireless link failure report or the fourth wireless link failure report from the third network device, and determines the second wireless link failure report of the terminal device based on the first wireless link failure report or the fourth wireless link failure report.
  • the conditional switching configuration information is to optimize the conditional switching configuration information of the terminal device based on the first wireless link failure report or the fourth wireless link failure report.
  • Case 2 When the first failure information is recorded in the second wireless link failure report, and the second failure information is recorded in the third wireless link failure report, the recording of the first failure information, the third failure information, and the fourth failure information Way.
  • the terminal device determines a recording method of the first failure information, the third failure information and the fourth failure information according to the second timer, including: if the second timer does not expire, recording the fourth failure information in the second wireless link failure report Or in the third wireless link failure report; if the second timer times out, the fourth failure information is recorded in the fourth wireless link failure report.
  • the terminal device records the first failure information and the fourth failure information in the second wireless link failure report, records the third failure information in the third wireless link failure report, or records the first failure information in the second In the wireless link failure information, the third failure information and the fourth failure information are recorded in the third wireless link.
  • the terminal device can also send a second wireless link failure report or a third wireless link failure report to the third network device. Report.
  • the third network device sends the second wireless link failure report or the third wireless link failure report to the first network device.
  • the first network device receives the second wireless link failure report or the third wireless link failure report from the third network device, and determines the second conditional switching configuration information of the terminal device based on the received wireless link failure report, that is, optimizing the terminal Conditional switching configuration information of the device.
  • the terminal device may also send a second wireless link failure report to the third network device, or send a third wireless link failure report, or send a fourth wireless link failure report.
  • the wireless link failure report sent by the terminal device is also the latest wireless link failure report saved by the terminal device.
  • the third network device sends a second wireless link failure report, or a third wireless link failure report, or a fourth wireless link failure report to the first network device.
  • the first network device receives a second wireless link failure report from the third network device, or receives a third wireless link failure report, or receives a fourth wireless link failure report, and performs the operation according to the received wireless link failure report. Determine second conditional switching configuration information of the terminal device.
  • first, second and third can be used to record the first failure information, the third failure information and the fourth failure information respectively.
  • the information in the message is identified.
  • the terminal device records multiple failure information in the same wireless link failure report, which can associate the multiple failure information in the same wireless link failure report, so that the first network device based on the same wireless link failure report
  • Multiple failure information in the terminal device jointly analyze the reasons for wireless link failure of the terminal device, such as analyzing whether the reasons for the wireless link failure of the terminal device several times in a row are all due to the unreasonable first condition switching configuration information of the terminal device. of.
  • the terminal device records the current failure information after the current wireless link fails, the method of clearing the previously recorded failure information or wireless link failure report will make it impossible for the first network device to obtain the multiple wireless link occurrences of the terminal device.
  • the terminal device records multiple failure information when the wireless link fails in the same wireless link failure report, which can ensure that the terminal device has failure information for each time when multiple wireless link failures occur. This can ensure the integrity of the failure information when the wireless link fails, thereby improving the reliability of the first network device in analyzing the cause of the wireless link failure of the terminal device.
  • the terminal equipment After S201 or S202, the terminal equipment performs cell selection.
  • the cell selected by the terminal equipment is not a cell among the candidate cells configured in the first conditional handover configuration information, or when the terminal equipment fails to use the third cell to perform conditional handover-based recovery,
  • the terminal device re-establishes the RRC connection.
  • the first network device is the source MN of the terminal device
  • the second network device is the SN of the terminal device
  • the third network device and the fourth network device are both network devices to which the candidate cells configured by the first conditional handover configuration information belong, They are MN-A1 and MN-A2 respectively.
  • the interaction process between the terminal device, source MN, SN, MN-A1 and MN-A1 in the communication method 200 is introduced in detail.
  • Figure 9 is an interaction flow chart between the terminal device, source MN, SN, MN-A1, and MN-A1. As shown in Figure 9, the interaction between the terminal device, source MN, SN, MN-A1, and MN-A1 includes the following steps:
  • the source MN configures the fast recovery process to the terminal device.
  • the source MN interacts with the handover procedure (handover procedure) with MN-A1 and MN-A2 respectively, that is, the source MN sends handover requests to MN-A1 and MN-A2 respectively to request that the terminal equipment can send messages to MN-A1 and MN-A1.
  • the source MN receives the confirmation information sent by MN-A1 and MN-A2 respectively, it indicates that the terminal device can subsequently perform conditional handover to MN-A1 and MN-A1.
  • the source MN sends RRC reconfiguration information to the terminal device, so as to configure the first conditional handover configuration information to the terminal device through the RRC reconfiguration information.
  • the terminal device detects a wireless link failure with the source MN, that is, a wireless link failure (MCG RLF) with the MCG.
  • MCG RLF wireless link failure
  • the fast link recovery failure between the terminal device and the source MN may mean that the terminal device does not receive the first response message before the T316 expires.
  • the most superficial reason why the terminal device fails to perform fast link recovery (fast recovery) is that T316 expires.
  • the reasons for T316 expiration can be refined into one or more of the following: SCG deactivation, SCG wireless link failure, air interface and inter-station interaction delay is too large.
  • the inter-station interaction delay includes the first delay, the second delay and the third delay in the above communication method 100.
  • the inter-station interaction delay may be collected by the source MN (that is, the first network device) or by the SN (that is, the second network device).
  • the SN can also count the time period from sending the first failure message to receiving the first response message, or during the interaction process between the SN and the MN, such as the SN sending the secondary station add/modify/release/change request message to the secondary station. The time difference between the MN receiving the secondary station add/modify/release/change request confirmation message.
  • the source MN may also count the time period from the control plane message sent to the SN to the confirmation message received from the SN. For example, the source MN counts the time period from when the source MN sends the add/modify request message to the SN to when it receives the add/modify confirmation message from the SN.
  • the SN can count the air interface delay (ie, the third delay) of interaction with the terminal device.
  • the air interface delay can be divided into uplink delay and downlink delay.
  • the uplink delay and downlink delay can be directly adopted from the uplink delay and downlink delay of user plane data packets, that is, delay statistics are performed according to the granularity of each data wireless bearer of each terminal device.
  • the downlink delay includes PDCP layer delay (such as CU-UP delay), F1-U delay, and Hybrid Automatic Repeat Request (HARQ) transmission Or one or more of retransmission delay and RLC side delay (such as processing delay).
  • the delay of CU-UP can be: the time period from when CU-UP receives the data packet through NG-U to when it sends the data packet to CU-DU.
  • the uplink delay includes two processes: the uplink terminal side delay D1 and the uplink access network side delay D2.
  • the uplink terminal side delay is the packet data aggregation protocol on the terminal equipment side ( packet data convergence protocol, PDCP) buffering delay.
  • the time period corresponding to the PDCP buffering delay is from when the terminal device receives the data packet from the upper layer of PDCP to when it gets the uplink authorization to send the data packet. This delay also includes when the terminal equipment sends a scheduling request or random access to when it gets the uplink authorization.
  • the delay, that is, the uplink terminal side delay D1 is the time between the terminal equipment receiving the data and sending the data to the access network equipment. The terminal side delay is measured by the terminal equipment and reported to the access network equipment.
  • the uplink access network side delay D2 includes HARQ transmission or retransmission delay D2.1, RLC side delay D2.2, F1 interface delay D2.3, and PDCP reordering delay D2.4, etc.
  • D2.1 can be defined as the period from when the terminal device sends a data packet to when the access network device successfully receives the data packet.
  • D2.2 can be defined as when the first part of the RLC service data unit (SDU) is correctly received. The period of time when the RLC SDU is received and sent to the PDCP layer or CU;
  • D2.3 can be defined as the transmission status from when the CU sends a data packet to the distributed unit (DU) to when the CU receives the packet from the DU, and then minus Remove the feedback delay of the packet on the DU side, and then divide it by 2;
  • D2.4 can be defined as the period from receiving a PDCP SDU to sending the PDCP SDU to the upper layer.
  • the source MN can determine the reason why the terminal device fails to perform fast recovery through the above-mentioned statistical inter-station interaction delay (for example, the first delay, the second delay and the third delay) measurement information. If the source MN determines that the reason why the terminal device fails to perform fast recovery is that the air interface and inter-station interaction delay are too large, the source MN can obtain the inter-station interaction delay and air interface interaction delay measurement information, and reasonably configure T316 based on the delay measurement information Threshold to reduce the probability of terminal device failure to perform fast recovery.
  • the delay measurement information Threshold for example, the first delay, the second delay and the third delay
  • the reason for the failure of fast link recovery between the terminal device and the source MN may be that the terminal device failed to send MCG failure information to the source MN in S261, or it may be that the source MN failed to send the first response information to the terminal device in S262.
  • the terminal device When the terminal device detects a wireless link failure with the source MN, it starts the first timer. During the first timer period, if the fast link recovery with the source MN fails, a wireless link failure with the source MN will occur. The first failure information of wireless link failure and the third failure information of fast link recovery failure with the source MN are recorded in the first wireless link failure report.
  • the terminal device records the first failure information and the third failure information in the second wireless link failure report and the third wireless link failure report respectively.
  • the third failure information includes one or more of the following: indication information indicating whether the terminal device fails to perform fast link recovery, the timeout reason of the third timer, the reason for the wireless link failure of the secondary cell group, the deactivation of the secondary cell group .
  • the third failure information includes one or more of the following: indicating whether the terminal device has executed fast recovery, T316 expiry cause (fast recovery failure cause), SCG rlf, SCG deactivated. Among them, if the fast recovery failure cause is SCG RLF, the third failure information records SCG RLF failure information.
  • S271 The terminal device uses the third cell to perform conditional handover recovery.
  • cell selection is performed.
  • the selected cell is a candidate cell configured with the first conditional handover configuration information
  • conditional handover-based recovery is performed. Therefore, the third cell is the cell selected after the fast link recovery between the terminal device and the source MN fails, and is one of the candidate cells configured by the first conditional handover configuration information.
  • the terminal equipment When the terminal equipment fails to recover the fast link with the source MN, it starts the second timer and uses the third cell to perform conditional handover-based recovery during the second timer period. If the conditional handover-based recovery fails, the terminal equipment will The fourth failure information is recorded in the same wireless link failure report as the above-mentioned first failure information and/or third failure information. If after the second timer times out, the terminal device fails to perform conditional handover recovery by using the third cell, the fourth failure information indicating the conditional handover recovery failure will be recorded separately from the first failure information and the third failure information. , that is, recorded in different wireless link failure reports.
  • the terminal equipment After the fast link recovery between the terminal equipment and the source MN fails, if the selected cell is not a candidate cell configured with the first conditional handover configuration information, the terminal equipment performs RRC connection re-establishment. Or, after the fast link recovery between the terminal equipment and the source MN fails, if the selected cell is a candidate cell configured with the first conditional handover configuration information, recovery based on conditional handover is performed, but recovery based on conditional handover fails, and the terminal The device also performs RRC connection re-establishment.
  • the terminal device will fail first.
  • the information and the third failure information are recorded in the same wireless link failure report (i.e., the first wireless link failure report), which is helpful for the first network device to jointly analyze the terminal device and the first network device based on the first wireless link failure report.
  • the reasons for the failure of the wireless link between the terminal device and the failure of the fast link recovery with the first network device are thereby beneficial to reducing the probability of wireless link failure between the terminal device and the first network device, and reducing the risk of failure of the wireless link with the first network device. Probability of fast link recovery failure between network devices.
  • the wireless link between the terminal device and the first network device fails, and the fast link recovery with the first network device fails and the first timer times out, it indicates that the wireless link between the terminal device and the first network device fails.
  • the correlation between wireless link failure and fast link recovery failure with the first network device is weak.
  • the first failure information and the third failure information can be recorded in different wireless link failure reports respectively to benefit the first
  • the network device analyzes the reason why the wireless link fails between the terminal device and the first network device and the reason why the fast link recovery fails between the terminal device and the first network device based on the first failure information or the third failure information.
  • the fast link recovery between the terminal device and the first network device fails, if the first failure information and the third failure information are recorded in different wireless link failure reports, only the latest wireless link failure report will be left in the end.
  • the link failure report that is, the wireless link report that records the third failure information will overwrite the wireless link failure report that contains the first failure information.
  • the terminal device records the first failure information and the third failure information on the same wireless link. In the failure report, the record integrity of the failure information can be ensured, which is helpful for the first network device to obtain complete wireless link failure information.
  • the terminal device, the first network device and the second network device may include a hardware structure and/or a software module, in the form of a hardware structure, a software module, or a hardware structure plus a software module. form to achieve the above functions. Whether one of the above functions is performed as a hardware structure, a software module, or a hardware structure plus a software module depends on the specific application and design constraints of the technical solution.
  • an embodiment of the present application provides a communication device 1000.
  • the communication device 1000 may be a component of a terminal device (eg, an integrated circuit, a chip, etc.), a component of a first network device (eg, an integrated circuit, a chip, etc.), or a component of a second network device. (e.g. integrated circuits, chips, etc.).
  • the communication device 1000 may also be other communication units, used to implement the methods in the method embodiments of the present application.
  • the communication device 1000 may include: a communication unit 1001 and a processing unit 1002.
  • a storage unit 1003 may also be included.
  • one or more units as shown in Figure 10 may be implemented by one or more processors, or by one or more processors and memories; or by one or more processors and a transceiver; or may be implemented by one or more processors, memories, and transceivers, which are not limited in the embodiments of this application.
  • the processor, memory, and transceiver can be set separately or integrated.
  • the communication device 1000 has the function of implementing the sending end or receiving end described in the embodiments of this application.
  • the communication device 1000 includes modules or units or means (means) corresponding to the sending end executing the sending end-related steps described in the embodiments of this application.
  • the functions, units or means (means) can be implemented through software, or through Hardware implementation can also be implemented by hardware executing corresponding software implementation, or it can be implemented by combining software and hardware.
  • a communication device 1000 may include: a processing unit 1002 and a communication unit 1001;
  • the communication unit 1001 is configured to send first failure information to the second network device when the wireless link with the first network device fails, the first failure information includes first conditional handover configuration information, the first The network device is the network device to which the primary cell group to which the device is connected belongs, and the second network device is the network device to which the secondary cell group to which the terminal device is connected belongs; the communication unit 1001 is also used to receive messages from The first response message of the second network device, the first response message including first indication information or the cell identity of the first cell;
  • the first indication information is used to instruct the device to select a cell to access from the candidate cells configured by the first conditional handover configuration information, and the first cell is the cell to be switched by the device and is the cell to be switched.
  • the first condition is used to switch a cell among the candidate cells configured by the configuration information.
  • the processing unit 1002 is configured to: if access to the first cell or the second cell fails, or if access to the first cell or the second cell is successful and occurs within a preset time period If the wireless link fails, the wireless resource control connection is re-established; the second cell is the cell that the device selects to access based on the first indication information.
  • the processing unit 1002 is further configured to: record second failure information, and send a failure report to a third network device; the failure report includes the second failure information, and the third network device It is a network device to which the device successfully re-accesses, and the second failure information includes the message indication type of the first response message, and also includes the device accessing the first cell according to the first response message or The second cell fails, or access to the first cell or the second cell is successful and a wireless link failure occurs within the preset time period; the message indication type of the first response message indicates that the The first response message includes the first indication information or the cell identity of the first cell.
  • the second failure information further includes second indication information, and the second indication information is used to instruct the device to receive the first response message from a cell in the primary cell group. of the main community.
  • a communication device 1000 may include: a processing unit 1002 and a communication unit 1001;
  • Communication unit 1001 configured to receive first failure information from a second network device, where the first failure information includes information on wireless link failure between the terminal device and the device and first conditional handover configuration information. is a device to which the primary cell group to which the terminal equipment is accessed belongs, and the second network equipment is the network equipment to which the secondary cell group to which the terminal equipment is accessed belongs; the communication unit 1001 is also used to send messages to the second network The device sends first response information, where the first response message includes first indication information or the cell identity of the first cell;
  • the first instruction information is used to instruct the terminal device to select a cell to access from the candidate cells configured by the first conditional handover configuration information, and the first cell is the cell to be switched by the terminal device and It is a cell among the candidate cells configured by the first conditional handover configuration information.
  • the communication unit 1001 is also configured to receive a failure report from a third network device, where the failure report includes second failure information; the processing unit 1002 is configured to combine the first failure information and the Describe failure report association;
  • the third network device is a network device to which the terminal device successfully re-accesses;
  • the second failure information includes the message indication type of the first response message, and also includes the terminal device according to the first response message.
  • access to the first cell or the second cell fails, or access to the first cell or the second cell succeeds and a wireless link failure occurs within a preset time period, and the second cell is the terminal.
  • the device selects a cell to access based on the first indication information, and the message indication type of the first response message indicates that the first response message includes the first indication information or the cell identity of the first cell.
  • the second failure information includes the cell information carried in the failure report when the terminal device fails to access the first cell or the second cell according to the first response message.
  • the wireless network temporary identifier is the same as the cell wireless network temporary identifier carried by the first failure information, and the failure report is the failure report closest to the recording time of the first failure information.
  • the second failure information includes that the terminal device successfully accesses the first cell or the second cell according to the first response message and within the preset time period.
  • the cell corresponding to the candidate cell identifier carried in the failure report is one of the candidate cells configured by the first conditional handover configuration information in the first failure information, and the failure report is The failure report closest to the recording time of the first failure information.
  • the second failure information further includes second indication information, and the second indication information is used to indicate that the cell in which the terminal device receives the first response message is the primary cell group.
  • the processing unit 1002 is also configured to collect statistics on a first delay, where the first delay is an average inter-station interaction delay between the first network device and the second network device.
  • a communication device 1000 may include: a processing unit 1002 and a communication unit 1001;
  • Communication unit 1001 configured to receive first failure information from a terminal device, where the first failure information includes the connection between the terminal device and the first Wireless link failure information and first conditional handover configuration information between network devices, the first network device is the network device to which the primary cell group that the terminal device accesses belongs, and the device is the device that the terminal device accesses.
  • the communication unit 1001 is also used to send the first failure information to the first network device; the communication unit 1001 is also used to receive the first response information from the first network device; the communication unit 1001 is also used to Send the first response information to the terminal device;
  • the first response message includes first indication information or a cell identity of the first cell, and the first indication information is used to instruct the terminal device to select a connection from the candidate cells configured by the first conditional handover configuration information.
  • the first cell is the cell to be switched for the terminal device and is a cell among the candidate cells configured by the first conditional handover configuration information.
  • the processing unit 1002 is further configured to: count a second delay; the second delay is the interaction between the second network device and the first network device of the first failure information and The average inter-station interaction delay of the first response information, or the average inter-station interaction delay of the second network device and the first network device; the third delay is calculated; the third delay is The average air interface interaction delay between the second network device and the terminal device for exchanging the first failure information and the first response information, or the average air interface interaction time between the second network device and the terminal device Delay, the average air interface interaction delay is divided into uplink delay and downlink delay.
  • a communication device 1000 may include: a processing unit 1002 and a communication unit 1001;
  • the processing unit 1002 is configured to, if the wireless link with the first network device fails, and the fast link recovery with the first network device fails and the first timer has not expired, combine the first failure information with the first timer.
  • the third failure information is recorded in the first wireless link failure report;
  • the processing unit 1002 is configured to perform a fast link with the first network device if the wireless link with the first network device fails. If the path recovery fails and the first timer times out, the first failure information is recorded in the second wireless link failure report, and the third failure information is recorded in the third wireless link failure report;
  • the first failure information is information that a wireless link failure occurs between the device and the first network device
  • the third failure information is information that the device fails to perform fast link recovery
  • the first network device is a network device to which the primary cell group accessed by the device belongs
  • the first timer is started when the device detects a failure of the wireless link with the first network device.
  • the third failure information includes one or more of the following: indication information indicating whether the terminal device fails to perform fast link recovery, the timeout reason of the third timer, the secondary cell group Reasons for wireless link failure and secondary cell group deactivation;
  • the communication unit 1001 is further configured to: send the first wireless link failure report to the fourth network device, or send the second wireless link failure report, or send the The third wireless link failure report;
  • the fourth network device is a network device that is successfully accessed after the device detects that the wireless link with the first network device fails and the fast link recovery with the first network device fails. .
  • the processing unit 1002 is further configured to: when the conditional handover recovery using the third cell fails, determine the first failure information and the third failure information according to a second timer. and the recording method of the fourth failure information; the fourth failure information is the information that the terminal equipment fails to use the third cell to perform the recovery based on the conditional handover; the third cell is the information that the device detects and Among the candidate cells configured by the first conditional handover configuration information and obtained through cell selection after the wireless link between the first network device fails and the fast link recovery with the first network device fails. Cell; the second timer is started when the device detects that fast link recovery with the first network device fails.
  • the first failure information and the third failure information are recorded in the first wireless link failure report; the processing unit 1002 determines the first failure information according to a second timer .
  • the recording method of the third failure information and the fourth failure information is specifically used for: if the second timer does not expire, record the fourth failure information in the first wireless link failure report; if the second timer does not expire, the fourth failure information is recorded in the first wireless link failure report; After timeout, the fourth failure information is recorded in the fourth wireless link failure report.
  • the first failure information is recorded in the second wireless link failure report, and the second failure information is recorded in the third wireless link failure report; the processing unit 1002 Determine the recording method of the first failure information, the third failure information and the fourth failure information according to the second timer, specifically for: if the second timer does not time out, record the fourth failure information in the in the second wireless link failure report or the third wireless link failure report; if the second timer times out, the fourth failure information is recorded in the fourth wireless link failure report.
  • the communication unit 1001 is further configured to: send the first wireless link failure report to a third network device, or send the fourth wireless link failure report; the third network device
  • the device is a network device to which the device has successfully reconnected.
  • the communication unit 1001 is further configured to: send the second wireless link failure report to a third network device, or send the third wireless link failure report, or send the The fourth wireless link failure report;
  • the third network device is a network device that successfully reconnects after the device fails to perform recovery based on the conditional handover.
  • a communication device 1000 may include: a processing unit 1002 and a communication unit 1001;
  • the communication unit 1001 is configured to receive a first wireless link failure report; the processing unit 1002 is configured to determine the second conditional switching configuration information of the terminal device according to the first wireless link failure report;
  • the first wireless link failure report includes first failure information and third failure information, or includes first failure information, third failure information and fourth failure information;
  • the first failure information is the terminal Information about a wireless link failure occurring between the device and the device,
  • the third failure information is information about the terminal device's failure to perform fast link recovery, and
  • the fourth failure information is about the terminal device's condition-based switching.
  • the device is a device to which the primary cell group accessed by the terminal equipment belongs.
  • a communication device 1000 may include: a processing unit 1002 and a communication unit 1001;
  • the communication unit 1001 is configured to receive a second wireless link failure report or a third wireless link failure report;
  • the processing unit 1002 is configured to receive a second wireless link failure report or a third wireless link failure report based on the second wireless link failure report or the third wireless link failure report, Determine second conditional handover configuration information of the terminal device; wherein the second wireless link failure report includes first failure information, and the third wireless link failure report includes third failure information; or, the second wireless link failure report includes first failure information.
  • the link failure report includes first failure information and fourth failure information, and the third wireless link failure report includes third failure information; or the second wireless link failure report includes first failure information, and the third wireless link failure report includes The third wireless link failure report includes third failure information and fourth failure information;
  • the first failure information is information that a wireless link failure occurs between the terminal equipment and the device
  • the third failure information is information that the terminal equipment fails to perform fast link recovery
  • the fourth failure information is The information is information that the terminal equipment fails to perform recovery based on conditional handover;
  • the device is a network equipment to which the primary cell group to which the terminal equipment access belongs.
  • a communication device 1000 may include: a processing unit 1002 and a communication unit 1001;
  • the communication unit 1001 is configured to receive the first wireless link failure report or the fourth wireless link failure report;
  • the processing unit 1002 is configured to receive the first wireless link failure report or the fourth wireless link failure report, Determine the second conditional handover configuration information of the terminal device; wherein the first wireless link failure report includes first failure information and third failure information, the fourth wireless link failure report includes fourth failure information;
  • the first The failure information is information that a wireless link failure occurs between the terminal device and the device, the third failure information is information that the terminal device fails to perform fast link recovery, and the fourth failure information is the Information indicating that the terminal equipment fails to perform conditional handover recovery;
  • the device is a device to which the primary cell group to which the terminal equipment accesses belongs.
  • a communication device 1000 may include: a processing unit 1002 and a communication unit 1001;
  • the communication unit 1001 is configured to receive a second wireless link failure report, or receive a third wireless link failure report, or receive a fourth wireless link failure report; the processing unit 1002 is configured to receive the second wireless link failure report according to the second wireless link failure report.
  • the radio link failure report, or the third radio link failure report, or the fourth radio link failure report determines the second conditional handover configuration information of the terminal device; wherein the second radio link failure report includes the first failure information, the third wireless link failure report includes second failure information, the fourth wireless link failure report includes fourth failure information; the first failure information is an error occurred between the terminal device and the device.
  • the third failure information is information that the terminal device fails to perform fast link recovery
  • the fourth failure information is information that the terminal device fails to perform conditional handover-based recovery
  • the device is a device to which the primary cell group accessed by the terminal equipment belongs.
  • FIG. 11 is a schematic structural diagram of the communication device 1100.
  • the communication device 1100 may be a terminal device, or may be a chip, chip system, or processor that supports the terminal device to implement the above method.
  • the communication device 1100 may also be a first network device, or a chip, chip system, or processor that supports the first network device to implement the above method.
  • the communication device 1100 may also be a second network device, or may be a chip, chip system, or processor that supports the second network device to implement the above method.
  • the device can be used to implement the method described in the above method embodiment. For details, please refer to the description in the above method embodiment.
  • the communication device 1100 may include one or more processors 1101 .
  • the processor 1101 may be a general-purpose processor or a special-purpose processor. For example, it can be a baseband processor, digital signal processor, application specific integrated circuit, field programmable gate array or other programmable logic. logic device, discrete gate or transistor logic device, discrete hardware component, or central processing unit (CPU).
  • the baseband processor can be used to process communication protocols and communication data
  • the central processor can be used to process communication devices (such as base stations, baseband chips, terminals, terminal chips, distributed units (DU) or centralized units (Centralized Units)). unit, CU), etc.) to control, execute software programs, and process data of software programs.
  • the communication device 1100 may include one or more memories 1102, on which instructions 1104 may be stored, and the instructions may be executed on the processor 1101, causing the communication device 1100 to perform the above method. Methods described in the Examples.
  • the memory 1102 may also store data.
  • the processor 1101 and the memory 1102 can be provided separately or integrated together.
  • the memory 1102 may include, but is not limited to, non-volatile memories such as hard disk drive (HDD) or solid-state drive (SSD), random access memory (Random Access Memory, RAM), erasable and programmable memory.
  • non-volatile memories such as hard disk drive (HDD) or solid-state drive (SSD), random access memory (Random Access Memory, RAM), erasable and programmable memory.
  • Read-only memory Erasable Programmable ROM, EPROM
  • ROM or portable read-only memory Compact Disc Read-Only Memory, CD-ROM
  • the communication device 1100 may also include a transceiver 1105 and an antenna 1106.
  • the transceiver 1105 may be called a transceiver unit, a transceiver, a transceiver circuit, etc., and is used to implement transceiver functions.
  • the transceiver 1105 may include a receiver and a transmitter.
  • the receiver may be called a receiver or a receiving circuit, etc., used to implement the receiving function;
  • the transmitter may be called a transmitter, a transmitting circuit, etc., used to implement the transmitting function.
  • the communication device 1100 is a terminal device: the transceiver 1105 is used to execute S101 and S104 in the above communication method 100, and the processor 1101 is used to execute S201 and S202 in the above communication method 200.
  • the communication device 1100 is a first network device: the transceiver 1105 is used to perform S102 and S103 in the above communication method 100.
  • the communication device 1100 is a second network device: the transceiver 1105 is used to perform S101, S102, S103, and S104 in the above communication method 100.
  • the processor 1101 may include a transceiver for implementing receiving and transmitting functions.
  • the transceiver may be a transceiver circuit, an interface, or an interface circuit.
  • the transceiver circuits, interfaces or interface circuits used to implement the receiving and transmitting functions can be separate or integrated together.
  • the above-mentioned transceiver circuit, interface or interface circuit can be used for reading and writing codes/data, or the above-mentioned transceiver circuit, interface or interface circuit can be used for signal transmission or transfer.
  • the processor 1101 can store instructions 1103, and the instructions 1103 are run on the processor 1101, which can cause the communication device 1100 to execute the method described in the above method embodiment.
  • the instructions 1103 may be fixed in the processor 1101, in which case the processor 1101 may be implemented by hardware.
  • the communication device 1100 may include a circuit, and the circuit may implement the sending or receiving or communication functions in the foregoing method embodiments.
  • the processor and transceiver described in the embodiments of this application can be implemented in integrated circuits (ICs), analog ICs, radio frequency integrated circuits (RFICs), mixed signal ICs, application specific integrated circuits (application specific integrated circuits). circuit (ASIC), printed circuit board (PCB), electronic equipment, etc.
  • the processor and transceiver can also be manufactured using various IC process technologies, such as complementary metal oxide semiconductor (CMOS), n-type metal oxide-semiconductor (NMOS), P-type Metal oxide semiconductor (positive channel metal oxide semiconductor, PMOS), bipolar junction transistor (Bipolar Junction Transistor, BJT), bipolar CMOS (BiCMOS), silicon germanium (SiGe), gallium arsenide (GaAs), etc.
  • CMOS complementary metal oxide semiconductor
  • NMOS n-type metal oxide-semiconductor
  • PMOS P-type Metal oxide semiconductor
  • BJT bipolar junction transistor
  • BiCMOS bipolar CMOS
  • SiGe silicon germanium
  • GaAs gallium arsenide
  • the scope of the communication device described in the embodiment of the present application is not limited thereto, and the structure of the communication device may not be limited by FIG. 11 .
  • the communication device may be a stand-alone device or may be part of a larger device.
  • the communication device may be:
  • the IC collection may also include a storage component for storing data and instructions;
  • ASIC such as modem (modulator)
  • the communication device and chip in the embodiment of the present application can also perform the implementation described above for the communication device 1000.
  • Those skilled in the art can also understand that the various illustrative logical blocks and steps listed in the embodiments of this application can be implemented by electronic hardware, computer software, or a combination of both. Whether such functionality is implemented in hardware or software depends on the specific application and overall system design requirements. Those skilled in the art can use various methods to implement the described functions for each specific application, but such implementation should not be understood as exceeding the protection scope of the embodiments of the present application.
  • This application also provides a computer-readable storage medium for storing computer software instructions. When the instructions are executed by a communication device, the functions of any of the above method embodiments are implemented.
  • This application also provides a computer program product for storing computer software instructions. When the instructions are executed by a communication device, the functions of any of the above method embodiments are implemented.
  • This application also provides a computer program that, when run on a computer, implements the functions of any of the above method embodiments.
  • This application also provides a communication system, which includes one or more network devices and one or more terminal devices.
  • the system may also include other devices that interact with network devices and terminal devices in the solution provided by this application.
  • the above embodiments may be implemented in whole or in part by software, hardware, firmware, or any combination thereof.
  • software When implemented using software, it may be implemented in whole or in part in the form of a computer program product.
  • the computer program product includes one or more computer instructions. When the computer instructions are loaded and executed on the computer, the processes or functions described in the embodiments of the present application are generated in whole or in part.
  • the computer may be a general-purpose computer, a special-purpose computer, a computer network, or other programmable device.
  • the computer instructions may be stored in or transmitted from one computer-readable storage medium to another, e.g., the computer instructions may be transferred from a website, computer, server, or data center Transmission to another website, computer, server or data center through wired (such as coaxial cable, optical fiber, digital subscriber line (DSL)) or wireless (such as infrared, wireless, microwave, etc.) means.
  • the computer-readable storage medium may be any available medium that can be accessed by a computer or a data storage device such as a server, data center, etc. that contains one or more available media integrated therein.
  • the available media may be magnetic media (eg, floppy disk, hard disk, magnetic tape), optical media (eg, high-density digital video disc (DVD)), or semiconductor media (eg, SSD), etc.

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Abstract

本申请提供了一种通信方法及装置。该方法可以应用于终端设备，该方法包括：在与第一网络设备之间的无线链路失败时，向第二网络设备发送第一失败信息，第一失败信息包括第一条件切换配置信息；接收来自第二网络设备的第一响应消息，第一响应消息包括第一指示信息或第一小区的小区标识。第一指示信息用于指示终端设备从第一条件切换配置信息配置的候选小区中选择接入的小区，第一小区是终端设备的待切换小区且是第一条件切换配置信息配置的候选小区中的小区。终端设备可根据第一响应信息接入第一条件切换配置信息配置的候选小区中的小区，有利于快速恢复终端设备与主小区组之间的无线链路。

Description

一种通信方法及装置
本申请要求于2022年7月20日提交中国国家知识产权局、申请号为202210852364.7、申请名称为“一种通信方法及装置”的中国专利申请的优先权，其全部内容通过引用结合在本申请中。
技术领域
本申请涉及通信技术领域，尤其涉及一种通信方法及装置。
背景技术
无线网络中，一个用户设备(user equipment，UE)和多个基站通信的方式被称为双连接(dual-connectivity，DC)，或者被称为多模双连接(multi-Radio dual connectivity，MR-DC)。DC中，与核心网有控制面信令交互的基站称为主基站或主节点(master node，MN)，其他基站称为辅基站或辅节点(secondary node，SN)。
UE在一个基站下可以同时接收多个小区的服务，MN为UE提供服务的小区组可称为主小区组(master cell group，MCG)，SN为UE提供服务的小区组可称为辅小区组(secondary cell group，SCG)。从而UE可通过MCG中的一个或多个小区与MN进行连接，还可通过SCG中的一个或多个小区与SN连接。
UE检测到与源MN之间的无线链路失败(radio link failure，RLF)时，如何尽快接入目标MN，恢复与MCG之间的无线链路仍为目前亟待解决的一个问题。
发明内容
本申请实施例提供了一种通信方法及装置，有利于快速恢复终端设备与主小区组之间的无线链路。
第一方面，本申请实施例提供一种通信方法，可应用于终端设备(例如终端设备的设备或芯片上)。该方法中，终端设备在与第一网络设备之间的无线链路失败时，向第二网络设备发送第一失败信息，第一失败信息包括第一条件切换配置信息。终端设备接收来自第二网络设备的第一响应消息，第一响应消息包括第一指示信息或第一小区的小区标识。
其中，第一指示信息用于指示终端设备从第一条件切换配置信息配置的候选小区中选择接入的小区，第一小区是终端设备的待切换小区且是第一条件切换配置信息配置的候选小区中的小区。第一条件切换配置信息是第一网络设备给终端设备配置的条件切换配置信息。第一网络设备是终端设备接入的主小区组所属的网络设备，第二网络设备是终端设备接入的辅小区组所属的网络设备。
本申请实施例中，终端设备在与第一网络设备之间的无线链路失败时，可以在进行与第一网络设备之间的无线链路恢复时，接收用于指示从第一条件切换配置信息配置的候选小区中选择接入的小区的第一指示信息，或者接收从第一条件切换配置信息配置的候选小区中选择的第一小区的小区标识，从而，终端设备可及时接入第一条件切换配置信息配置的候选小区中的小区，有利于快速恢复终端设备与主小区组之间的无线链路。
另外，终端设备在与第一网络设备之间的无线链路失败，进行与第一网络设备之间的无线链路恢复时，上报的第一失败信息包括第一条件切换配置信息，有利于第一网络设备后续基于第一失败信息优化终端设备的条件切换配置信息，可减少过晚条件切换发生的次数，从而可减少终端设备与第一网络设备之间的无线链路失败概率。
一种可选的实施方式中，终端设备如果接入第一小区或第二小区失败，或者，接入第一小区或第二小区成功且在预设时长内发生无线链路失败，进行无线资源控制连接重建立。该第二小区是终端设备根据第一指示信息选择接入的小区。
如果终端设备根据第一响应信息接入小区失败，或者接入小区成功但在预设时长内发生无线链路失败，均可认定为终端设备根据第一响应信息未成功接入目标小区，因此终端设备进行无线资源控制连接重建立，以重新接入目标小区。
一种可选的实施方式中，如果终端设备接入第一小区或第二小区失败，或者，接入第一小区或第二小区成功且在预设时长内发生无线链路失败，终端设备还可记录第二失败信息，并向第三网络设备发送失败 报告，该失败报告包括第二失败信息。第三网络设备是终端设备重新接入成功的网络设备。
其中，第二失败信息包括第一响应消息的消息指示类型，还包括终端设备根据第一响应消息接入第一小区或所述第二小区失败，或者，接入第一小区或第二小区成功且在预设时长内发生无线链路失败。第一响应消息的消息指示类型指示第一响应消息包括第一指示信息或第一小区的小区标识。
终端设备还可将根据第一响应信息接入小区未成功时的第二失败信息以失败报告的方式发送给第三网络设备，以使得第三网络设备将该失败报告转发给第一网络设备，从而有利于第一网络设备根据该失败报告分析终端设备接入小区未成功的原因。
一种可选的实施方式中，第二失败信息还包括第二指示信息，第二指示信息用于指示终端设备接收第一响应消息的小区为主小区组中的主小区，第一响应信息是终端设备记录第二失败信息之前最后一次接收的信息。
另一种可选的实施方式中，第二失败信息还包括第三指示信息，第三指示信息用于指示终端设备根据第一响应消息未成功接入的小区是否为第一条件切换配置信息配置的候选小区中的小区。
第二方面，本申请还提供一种通信处理方法，该方面的通信方法与第一方面所述的通信方法相对应，该方面的通信方法是从第一网络设备侧进行阐述的(可应用于第一网络设备的设备或芯片上)。该方法中，第一网络设备接收第二网络设备的第一失败信息，第一失败信息包括终端设备与第一网络设备之间无线链路失败的信息和第一条件切换配置信息。第一网络设备向第二网络设备发送第一响应信息，第一响应消息包括第一指示信息或第一小区的小区标识。
其中，第一指示信息用于指示终端设备从第一条件切换配置信息配置的候选小区中选择接入的小区，第一小区是终端设备的待切换小区且是第一条件切换配置信息配置的候选小区中的小区。第一网络设备是终端设备接入的主小区组所属的网络设备，第二网络设备是终端设备接入的辅小区组所属的网络设备。
本申请实施例中，第一网络设备在与终端设备之间无线链路失败，以及接收到终端设备上报的第一失败信息后，发送的第一响应信息包括用于指示从第一条件切换配置信息配置的候选小区中选择接入的小区的第一指示信息，或者包括从第一条件切换配置信息配置的候选小区中选择的第一小区的小区标识，从而有利于终端设备及时接入第一条件切换配置信息配置的候选小区中的小区，即有利于快速恢复终端设备与主小区组之间的无线链路。
另外，第一网络设备接收的第一失败信息包括该第一网络设备给终端设备配置的第一条件切换配置信息，可使得第一网络设备后续根据第一失败信息优化终端设备的条件切换配置信息，从而可减少过晚条件切换发生的次数，进而可减少终端设备与第一网络设备之间的无线链路失败概率。
一种可选的实施方式中，第一网络设备还可接收来自第三网络设备的失败报告，并将第一失败信息和失败报告关联。
其中，失败报告包括第二失败信息，第二失败信息包括第一响应消息的消息指示类型，还包括终端设备根据第一响应消息接入第一小区或第二小区失败，或者，接入第一小区或第二小区成功且在预设时长内发生无线链路失败。第一响应消息的消息指示类型指示第一响应消息包括第一指示信息或第一小区的小区标识。第二小区是终端设备根据第一指示信息选择接入的小区。第三网络设备是终端设备重新接入成功的网络设备。
第一网络设备还可接收终端设备根据第一响应信息接入小区失败时记录的失败报告，并将失败报告和第一失败信息关联，从而可使得第一网络设备基于关联后的失败信息，更加准确的联合分析终端设备与第一网络设备发生无线链路失败，以及根据第一响应信息接入小区失败的原因。
一种可选的实施方式中，第二失败信息包括终端设备根据第一响应消息接入第一小区或第二小区失败时，失败报告携带的小区无线网络临时标识和第一失败信息携带的小区无线网络临时标识相同，且失败报告是与第一失败信息的记录时间最接近的失败报告。
第二失败信息包括终端设备根据第一响应消息接入第一小区或第二小区失败时，表明终端设备未成功接入第一小区或第二小区，即终端设备的服务小区未发生变化，从而终端设备的小区无线网络临时标识未发生变化。那么，第一网络设备关联的失败报告和第一失败信息中携带相同的小区无线网络临时标识，且失败报告是与第一失败信息的记录时间最接近的失败报告。
另一种可选的实施方式中，第二失败信息包括终端设备根据第一响应消息接入第一小区或第二小区成功且在预设时长内发生无线链路失败时，失败报告携带的候选小区标识所对应的小区是第一失败信息中第一条件切换配置信息配置的候选小区中的小区，且失败报告是与第一失败信息的记录时间最接近的失败报告。
第二失败信息包括终端设备根据第一响应消息接入第一小区或第二小区成功且在预设时长内发生无线链路失败时，表明终端设备曾在较短时间内接入第一小区或第二小区，那么终端设备的服务小区在接入第一小区或第二小区成功时发生了变化，即终端设备的小区无线网络临时标识发生了变化。然而，终端设备的第一条件切换配置信息未发生变化，因此第一网络设备可依据失败报告携带的候选小区标识所对应的小区是第一条件切换配置信息配置的候选小区中的小区原则，将第一失败信息和失败报告关联，且失败报告是与第一失败信息的记录时间最接近的失败报告。
一种可选的实施方式中，第二失败信息还包括第二指示信息，第二指示信息用于指示终端设备接收第一响应消息的小区为主小区组中的主小区，第一响应信息是终端设备记录第二失败信息之前最后一次接收的信息。
另一种可选的实施方式中，第二失败信息还包括第三指示信息，第三指示信息用于指示终端设备根据第一响应消息未成功接入的小区是否为第一条件切换配置信息配置的候选小区中的小区。
一种可选的实施方式中，第一网络设备统计第一时延，第一时延为第一网络设备与第二网络设备的站间交互平均时延。该方式中有利于第一网络设备在终端设备执行快速链路恢复失败时，根据该第一时延，确定终端设备执行快速链路恢复失败的原因是否是第一网络设备与第二网络设备的站间交互平均时延(即第一时延)过大造成的。
第三方面，本申请还提供一种通信处理方法，该方面的通信方法与第一方面、第二方面所述的通信方法相对应，该方面的通信方法是从第二网络设备侧进行阐述的(可应用于第二网络设备的设备或芯片上)。该方法中，第二网络设备接收来自终端设备的第一失败信息，第一失败信息包括终端设备与第一网络设备之间无线链路失败的信息和第一条件切换配置信息。第二网络设备向第一网络设备发送第一失败信息。第二网络设备接收来自第一网络设备的第一响应信息，第一响应消息包括第一指示信息或第一小区的小区标识。第二网络设备向终端设备发送第一响应信息。
其中，第一指示信息用于指示终端设备从第一条件切换配置信息配置的候选小区中选择接入的小区，第一小区是终端设备的待切换小区且是第一条件切换配置信息配置的候选小区中的小区。第一网络设备是终端设备接入的主小区组所属的网络设备，第二网络设备是终端设备接入的辅小区组所属的网络设备。
第二网络设备在终端设备与第一网络设备之间的无线链路失败时，将终端设备上报的第一失败信息转发给第一网络设备，并将第一网络设备发送的第一响应信息转发给终端设备，以使得终端设备与第一网络设备之间的快速无线链路恢复成功，从而有利于终端设备基于第一响应信息及时接入第一条件切换配置信息配置的候选小区中的小区，即有利于快速恢复终端设备与主小区组之间的无线链路。
一种可选的实施方式中，第二网络设备统计第二时延，以及第三时延。其中，第二时延为第二网络设备与第一网络设备交互第一失败信息和第一响应信息的站间交互平均时延，或者为第二网络设备与第一网络设备的站间交互平均时延。第三时延为第二网络设备与终端设备的控制面信令空口交互平均时延，该空口交互平均时延分为上行时延和下行时延，可以直接采纳已有的用户面数据包的上行时延和下行时延结果，即每个终端设备的每个数据无线承载的粒度的时延统计结果。也可以参考用户面数据包的统计方式，按照每个终端设备的每个信令无线承载的粒度统计控制面信令的上行时延和下行时延。
该方式有利于第二网络设备向第一网络设备发送第二时延和第三时延，进而有利于第一网络设备在终端设备执行快速链路恢复失败时，基于第二时延和第三时延，确定终端设备执行快速链路恢复失败的原因。例如，若第二时延大于第一预设值，则第一网络设备确定终端设备执行快速链路恢复失败的原因可能是第二时延过大造成的。再例如，若第三时延大于第二预设值，则第一网络设备确定终端设备执行快速链路恢复失败的原因可能是第三时延过大造成的。
第四方面，本申请实施例还提供一种通信处理方法，可应用于终端设备(例如终端设备的设备或芯片上)。该方法包括：终端设备如果与第一网络设备之间的无线链路失败，以及与第一网络设备之间的快速链路恢复失败且第一定时器未超时，将第一失败信息和第三失败信息记录在第一无线链路失败报告中。终端设备如果与第一网络设备之间的无线链路失败，以及与第一网络设备之间的快速链路恢复失败且第一定时器超时，将第一失败信息记录在第二无线链路失败报告中，以及将第三失败信息记录在第三无线链路失败报告中。
其中，第一失败信息是终端设备与第一网络设备之间发生无线链路失败的信息，第三失败信息是终端设备执行快速链路恢复失败的信息。第一网络设备是终端设备接入的主小区组所属的网络设备。第一定时器是终端设备在检测到与第一网络设备之间的无线链路失败时开启的。
本申请实施例中，终端设备如果与第一网络设备之间的无线链路失败，以及与第一网络设备之间的快 速链路恢复失败时，可根据第一定时器是否超时，确定将第一失败信息和第三失败信息记录在同一个无线链路失败报告中，还是分别记录在不同的无线链路失败报告中。
如果第一定时器未超时，终端设备与第一网络设备之间的快速链路恢复失败的原因可能和终端设备与第一网络设备之间的无线链路失败的关联性较高，因此将第一失败信息和第三失败信息记录在同一个无线失败链路报告(即第一无线链路失败报告)中，有利于后续第一网络设备根据第一无线链路失败报告，联合分析终端设备与第一网络设备之间无线链路失败，以及与第一网络设备之间的快速链路恢复失败的原因。如果第一定时器超时，终端设备与第一网络设备之间的快速链路恢复失败的原因可能和终端设备与第一网络设备之间的无线链路失败的关联性较弱，因此将第一失败信息和第三失败信息分别记录在不同的无线链路失败报告中。
另外，与终端设备在与第一网络设备之间的快速链路恢复失败时，第一失败信息和第三失败信息如果分别记录在不同的无线链路失败报告里，最终只留下最新的无线链路失败报告，即记录第三失败信息的无线链路报告会覆盖掉包含第一失败信息的无线链路失败报告，终端设备将第一失败信息和第三失败信息记录在同一个无线链路失败报告中，可保证失败信息的记录完整性，从而有利于第一网络设备获得完整的无线链路失败信息。
一种可选的实施方式中，第三失败信息包括以下一种或多种：指示终端设备是否执行快速链路恢复失败的指示信息、第三定时器的超时原因、辅小区组发生无线链路失败的原因、辅小区组去激活。
第三失败信息包括以上一种或多种时，有利于第一网络设备接收到该第三失败信息后，基于第三失败信息的内容，确定终端设备执行快速链路恢复失败的原因。
一种可选的实施方式中，终端设备将第一失败信息和第三失败信息记录在第一无线链路失败报告中时，还可向第四网络设备发送第一无线链路失败报告。或者，终端设备将第一失败信息记录在第二无线链路失败报告中，将第三失败信息记录在第三无线链路失败报告中时，还可向第四网络设备发送第二无线链路失败报告，或者，发送第三无线链路失败报告。其中，第四网络设备是终端设备检测到与第一网络设备之间的无线链路失败，且与第一网络设备之间的快速链路恢复失败后接入成功的网络设备。也就是说，第四网络设备是终端设备检测到与第一网络设备之间的无线链路失败，且与第一网络设备之间的快速链路恢复失败后，进行小区选择，选择的小区是第一切换配置信息配置的候选小区中的小区时，该接入成功的小区所属的网络设备。
可选的，第四网络设备是终端设备检测到与第一网络设备之间的无线链路失败，且与第一网络设备之间的快速链路恢复失败后，进行小区选择，选择的小区不是第一条件切换配置信息配置的候选小区中的小区时，进行无线资源控制连接重建立，重新接入成功的网络设备。
该方式有利于第四网络设备向第一网络设备转发第一无线链路失败报告，或者转发第二无线链路失败报告和第三无线链路失败报告，进而有利于第一网络设备根据接收的无线链路失败报告，分析终端设备与第一网络设备之间无线链路失败，以及与第一网络设备之间的快速链路恢复失败的原因。
一种可选的实施方式中，终端设备在利用第三小区进行基于条件切换的恢复失败时，还可根据第二定时器确定第一失败信息、第三失败信息和第四失败信息的记录方式。
其中，第四失败信息是终端设备利用第三小区进行基于条件切换的恢复失败的信息。第三小区是终端设备检测到与第一网络设备之间的无线链路失败，以及与第一网络设备之间的快速链路恢复失败后通过小区选择获得的且是第一条件切换配置信息配置的候选小区中的小区。第二定时器是终端设备在检测到与第一网络设备之间的快速链路恢复失败时开启的。
一种可选的实施方式中，如果第一失败信息和第三失败信息记录在第一无线链路失败报告中，上述终端设备根据第二定时器确定第一失败信息、第三失败信息和第四失败信息的记录方式，包括：如果第二定时器未超时，将第四失败信息记录在第一无线链路失败报告中；如果第二定时超时，将第四失败信息记录在第四无线链路失败报告中。
如果第一失败信息和第三失败信息记录在第一无线链路失败报告中，第二定时器未超时，终端设备将第四失败信息记录在第一无线链路失败报告中，即将第一失败信息、第三失败信息和第四失败信息均记录在同一个无线链路失败报告中，以有利于第一网络设备根据第一无线链路失败报告联合分析到与第一网络设备之间的无线链路失败、与第一网络设备之间的快速链路恢复失败，以及利用第三小区进行基于条件切换的恢复失败的原因。如果第一失败信息和第三失败信息记录在第一无线链路失败报告中，第二定时器超时，终端设备将第四失败信息记录在不同于第一无线链路失败报告的第四无线链路失败报告中，即不将第四失败信息与第一失败信息、第三失败信息关联。
该情况下，终端设备还可向第三网络设备发送第一无线链路失败报告，或者，发送第四无线链路失败报告。第三网络设备是终端设备重新接入成功的网络设备。该方式可使得第三网络设备向第一网络设备转发接收的无线链路失败报告，从而有利于第一网络设备根据接收的无线链路失败报告分析终端设备发生无线链路失败的原因。
另一种可选的实施方式中，第一失败信息记录在第二无线链路失败报告中，第二失败信息记录在第三无线链路失败报告中时，终端设备根据第二定时器确定第一失败信息、第三失败信息和第四失败信息的记录方式，包括：如果第二定时器未超时，将第四失败信息记录在第二无线链路失败报告或第三无线链路失败报告中；如果第二定时器超时，将第四失败信息记录在第四无线链路失败报告中。
如果第一失败信息记录在第二无线链路失败报告中，第二失败信息记录在第三无线链路失败报告中，第二定时器未超时，终端设备将第四失败信息记录在第二无线链路失败报告和第三无线链路失败报告中的任一无线链路失败报告中，以有利于第一网络设备根据第一失败信息、第三失败信息和第四失败信息中的其中两个失败信息，联合分析终端设备发生无线链路失败的原因。
该情况下，终端设备还可向第三网络设备发送第二无线链路失败报告，或者，发送第三无线链路失败报告，或者，发送第四无线链路失败报告。第三网络设备是终端设备进行基于条件切换的恢复失败后重新接入成功的网络设备。该方式可使得第三网络设备向第一网络设备转发接收的无线链路失败报告，从而有利于第一网络设备根据接收的无线链路失败报告分析终端设备发生无线链路失败的原因。
第五方面，本申请还提供一种通信方法，该方面的通信方法与第四方面所述的通信方法相对应，该方面的通信方法是从第一网络设备侧进行阐述的(可应用于第一网络设备的设备或芯片上)。该方法中，第一网络设备接收第一无线链路失败报告。第一网络设备根据第一无线链路失败报告，确定终端设备的第二条件切换配置信息。
其中，第一无线链路失败报告包括第一失败信息和第三失败信息，或者，包括第一失败信息、第三失败信息和第四失败信息。第一失败信息是终端设备与第一网络设备之间发生无线链路失败的信息，第三失败信息是终端设备执行快速链路恢复失败的信息，第四失败信息是终端设备进行基于条件切换的恢复失败的信息。第一网络设备是终端设备接入的主小区组所属的网络设备。
本申请实施例中，第一网络设备接收第一无线链路失败报告，并基于第一无线链路失败报告分析终端设备发生无线链路失败的原因，进而确定终端设备的第二条件切换配置信息，即优化网络设备配置给终端设备的原有条件切换配置信息，有利于提高终端设备接入小区的成功率。
第六方面，本申请还提供一种通信处理方法，该方面的通信方法与第四方面所述的通信方法相对应，该方面的通信方法是从第一网络设备侧进行阐述的(可应用于第一网络设备的设备或芯片上)。该方法中，第一网络设备接收第二无线链路失败报告或第三无线链路失败报告。第一网络设备根据第二无线链路失败报告或第三无线链路失败报告，确定终端设备的第二条件切换配置信息。
其中，第二无线链路失败报告包括第一失败信息，第三无线链路失败报告包括第三失败信息；或者，第二无线链路失败报告包括第一失败信息和第四失败信息，第三无线链路失败报告包括第三失败信息；或者，第二无线链路失败报告包括第一失败信息，第三无线链路失败报告包括第三失败信息和第四失败信息。
第一失败信息是终端设备与第一网络设备之间发生无线链路失败的信息，第三失败信息是终端设备执行快速链路恢复失败的信息，第四失败信息是终端设备进行基于条件切换的恢复失败的信息。第一网络设备是终端设备接入的主小区组所属的网络设备。
本申请实施例中，第一网络设备接收终端设备发生无线链路失败后的无线链路失败报告，从而第一网络设备可基于接收到的无线链路失败报告分析终端设备发生无线链路失败的原因，进而优化网络设备配置给终端设备的原有条件切换配置信息，有利于提高终端设备接入小区的成功率。
第七方面，本申请还提供一种通信处理方法，该方面的通信方法与第四方面所述的通信方法相对应，该方面的通信方法是从第一网络设备侧进行阐述的(可应用于第一网络设备的设备或芯片上)。该方法中，第一网络设备接收第一无线链路失败报告或第四无线链路失败报告。第一网络设备根据第一无线链路失败报告或第四无线链路失败报告，确定终端设备的第二条件切换配置信息。
其中，第一无线链路失败报告包括第一失败信息和第三失败信息，第四无线链路失败报告包括第四失败信息。第一失败信息是终端设备与第一网络设备之间发生无线链路失败的信息，第三失败信息是终端设备执行快速链路恢复失败的信息，第四失败信息是终端设备进行基于条件切换的恢复失败的信息。第一网络设备是终端设备接入的主小区组所属的网络设备。
本申请实施例中，第一网络设备接收终端设备发生无线链路失败后的第一无线链路失败报告或第四无 线链路失败报告。从而，第一网络设备可基于第一无线链路失败报告或第四无线链路失败报告，分析终端设备发生无线链路失败的原因，优化网络设备配置给终端设备的原有条件切换配置信息，有利于提高终端设备接入小区的成功率。
第八方面，本申请还提供一种通信处理方法，该方面的通信方法与第四方面所述的通信方法相对应，该方面的通信方法是从第一网络设备侧进行阐述的(可应用于第一网络设备的设备或芯片上)。该方法中，第一网络设备接收第二无线链路失败报告，或者，接收第三无线链路失败报告，或者，接收第四无线链路失败报告。第一网络设备根据接收的无线链路失败报告，确定终端设备的第二条件切换配置信息。
其中，第二无线链路失败报告包括第一失败信息，第三无线链路失败报告包括第二失败信息，第四无线链路失败报告包括第四失败信息。第一失败信息是终端设备与第一网络设备之间发生无线链路失败的信息，第三失败信息是终端设备执行快速链路恢复失败的信息，第四失败信息是终端设备进行基于条件切换的恢复失败的信息。第一网络设备是终端设备接入的主小区组所属的网络设备。
本申请实施例中，第一网络设备接收终端设备发生无线链路失败后的第二无线链路失败报告，或第三无线链路失败报告，或第四无线链路失败报告。从而，第一网络设备可基于接收的无线链路失败报告，分析终端设备发生无线链路失败的原因，优化网络设备配置给终端设备的原有条件切换配置信息，有利于提高终端设备接入小区的成功率。
第九方面，本申请还提供一种通信装置。该通信装置具有实现上述第一方面所述的终端设备的部分或全部功能，或者，实现上述第二方面所述的第一网络设备的部分或全部功能，或者，实现上述第三方面所述的第二网络设备的部分或全部功能，或者，实现上述第四方面所述的终端设备的部分或全部功能，或者，实现上述第五方面至第八方面任一方面所述的第一网络设备的部分或全部功能。比如，该通信装置的功能可具备本申请中第一方面所述的终端设备的部分或全部实施例中的功能，也可以具备单独实施本申请中的任一个实施例的功能。所述功能可以通过硬件实现，也可以通过硬件执行相应的软件实现。所述硬件或软件包括一个或多个与上述功能相对应的单元或模块。
在一种可能的设计中，该通信装置的结构中可包括处理单元和通信单元，所述处理单元被配置为支持通信装置执行上述方法中相应的功能。所述通信单元用于支持该通信装置与其他通信装置之间的通信。所述通信装置还可以包括存储单元，所述存储单元用于与处理单元和通信单元耦合，其保存通信装置必要的程序指令和数据。
一种实施方式中，所述通信装置包括：处理单元和通信单元；处理单元用于控制通信单元进行数据/信令收发；
通信单元，用于在与第一网络设备之间的无线链路失败时，向第二网络设备发送第一失败信息，所述第一失败信息包括第一条件切换配置信息，所述第一网络设备是所述装置接入的主小区组所属的网络设备，所述第二网络设备是所述装置接入的辅小区组所属的网络设备；通信单元，还用于接收来自所述第二网络设备的第一响应消息；所述第一响应消息包括第一指示信息或第一小区的小区标识；
其中，所述第一指示信息用于指示所述装置从所述第一条件切换配置信息配置的候选小区中选择接入的小区；所述第一小区是所述装置的待切换小区且是所述第一条件切换配置信息配置的候选小区中的小区。
另外，该方面中，通信装置其他可选的实施方式可参见上述第一方面的相关内容，此处不再详述。
另一种实施方式中，所述通信装置包括：处理单元和通信单元；处理单元用于控制通信单元进行数据/信令收发；
通信单元，用于接收来自第二网络设备的第一失败信息，所述第一失败信息包括终端设备与所述第一网络设备之间无线链路失败的信息和第一条件切换配置信息，所述装置是所述终端设备接入的主小区组所属的装置，所述第二网络设备是所述终端设备接入的辅小区组所属的网络设备；通信单元，还用于向所述第二网络设备发送第一响应信息；所述第一响应消息包括第一指示信息或第一小区的小区标识；
其中，所述第一指示信息用于指示所述终端设备从所述第一条件切换配置信息配置的候选小区中选择接入的小区；所述第一小区是所述终端设备的待切换小区且是所述第一条件切换配置信息配置的候选小区中的小区。
另外，该方面中，通信装置其他可选的实施方式可参见上述第二方面的相关内容，此处不再详述。
又一种实施方式中，所述通信装置包括：处理单元和通信单元；处理单元用于控制通信单元进行数据/信令收发；
通信单元，用于接收来自终端设备的第一失败信息，所述第一失败信息包括所述终端设备与第一网络设备之间无线链路失败的信息和第一条件切换配置信息，所述第一网络设备是所述终端设备接入的主小区 组所属的网络设备，所述装置是所述终端设备接入的辅小区组所属的装置；通信单元，还用于向所述第一网络设备发送所述第一失败信息；通信单元，还用于接收来自所述第一网络设备的第一响应信息；通信单元，还用于向所述终端设备发送所述第一响应信息；
其中，所述第一响应消息包括第一指示信息或第一小区的小区标识；所述第一指示信息用于指示所述终端设备从所述第一条件切换配置信息配置的候选小区中选择接入的小区；所述第一小区是所述终端设备的待切换小区且是所述第一条件切换配置信息配置的候选小区中的小区。
另外，该方面中，通信装置其他可选的实施方式可参见上述第三方面的相关内容，此处不再详述。
又一种实施方式中，所述通信装置包括：处理单元和通信单元；通信单元用于进行数据/信令收发；
处理单元，用于如果与第一网络设备之间的无线链路失败，以及与所述第一网络设备之间的快速链路恢复失败且第一定时器未超时，将第一失败信息和第三失败信息记录在第一无线链路失败报告中；处理单元，还用于如果与所述第一网络设备之间的无线链路失败，以及与所述第一网络设备之间的快速链路恢复失败且所述第一定时器超时，将所述第一失败信息记录在第二无线链路失败报告中，以及将所述第三失败信息记录在第三无线链路失败报告中；
其中，所述第一失败信息是所述装置与所述第一网络设备之间发生无线链路失败的信息，所述第三失败信息是所述装置执行快速链路恢复失败的信息；所述第一网络设备是所述装置接入的主小区组所属的网络设备；所述第一定时器是所述装置在检测到与所述第一网络设备之间的无线链路失败时开启的。
另外，该方面中，通信装置其他可选的实施方式可参见上述第四方面的相关内容，此处不再详述。
又一种实施方式中，所述通信装置包括：处理单元和通信单元；
通信单元，用于接收第一无线链路失败报告；处理单元，用于根据所述第一无线链路失败报告，确定终端设备的第二条件切换配置信息；
其中，所述第一无线链路失败报告包括第一失败信息和第三失败信息，或者，包括第一失败信息、第三失败信息和第四失败信息；所述第一失败信息是所述终端设备与所述装置之间发生无线链路失败的信息，所述第三失败信息是所述终端设备执行快速链路恢复失败的信息，所述第四失败信息是所述终端设备进行基于条件切换的恢复失败的信息，所述装置是所述终端设备接入的主小区组所属的装置。
又一种实施方式中，所述通信装置包括：处理单元和通信单元；
通信单元，用于接收第二无线链路失败报告或第三无线链路失败报告；处理单元，用于根据所述第二无线链路失败报告或所述第三无线链路失败报告，确定终端设备的第二条件切换配置信息；
其中，所述第二无线链路失败报告包括第一失败信息，所述第三无线链路失败报告包括第三失败信息；或者，所述第二无线链路失败报告包括第一失败信息和第四失败信息，所述第三无线链路失败报告包括第三失败信息；或者，所述第二无线链路失败报告包括第一失败信息，所述第三无线链路失败报告包括第三失败信息和第四失败信息；
所述第一失败信息是所述终端设备与所述装置之间发生无线链路失败的信息，所述第三失败信息是所述终端设备执行快速链路恢复失败的信息，所述第四失败信息是所述终端设备进行基于条件切换的恢复失败的信息，所述装置是所述终端设备接入的主小区组所属的装置。
又一种实施方式中，所述通信装置包括：处理单元和通信单元；
通信单元，用于接收第一无线链路失败报告或第四无线链路失败报告；处理单元，用于根据所述第一无线链路失败报告或所述第四无线链路失败报告，确定终端设备的第二条件切换配置信息；
其中，第一无线链路失败报告包括第一失败信息和第三失败信息，所述第四无线链路失败报告包括第四失败信息；所述第一失败信息是所述终端设备与所述装置之间发生无线链路失败的信息，所述第三失败信息是所述终端设备执行快速链路恢复失败的信息，所述第四失败信息是所述终端设备进行基于条件切换的恢复失败的信息；所述装置是所述终端设备接入的主小区组所属的装置。
又一种实施方式中，所述通信装置包括：处理单元和通信单元；
通信单元，用于接收第二无线链路失败报告，或者，接收第三无线链路失败报告，或者，接收第四无线链路失败报告；处理单元，用于根据所述第二无线链路失败报告，或所述第三无线链路失败报告，或所述第四无线链路失败报告，确定终端设备的第二条件切换配置信息；
其中，第二无线链路失败报告包括第一失败信息，所述第三无线链路失败报告包括第二失败信息，所述第四无线链路失败报告包括第四失败信息；所述第一失败信息是所述终端设备与所述装置之间发生无线链路失败的信息，所述第三失败信息是所述终端设备执行快速链路恢复失败的信息，所述第四失败信息是所述终端设备进行基于条件切换的恢复失败的信息；所述装置是所述终端设备接入的主小区组所属的网络 设备。
作为示例，通信单元可以为收发器或通信接口，存储单元可以为存储器，处理单元可以为处理器。
一种实施方式中，所述通信装置包括：处理器和收发器；处理器用于控制收发器进行数据/信令收发；
收发器，用于在与第一网络设备之间的无线链路失败时，向第二网络设备发送第一失败信息，所述第一失败信息包括第一条件切换配置信息，所述第一网络设备是所述装置接入的主小区组所属的网络设备，所述第二网络设备是所述装置接入的辅小区组所属的网络设备；收发器，还用于接收来自所述第二网络设备的第一响应消息；所述第一响应消息包括第一指示信息或第一小区的小区标识；
其中，所述第一指示信息用于指示所述装置从所述第一条件切换配置信息配置的候选小区中选择接入的小区；所述第一小区是所述装置的待切换小区且是所述第一条件切换配置信息配置的候选小区中的小区。
另外，该方面中，上行通信装置其他可选的实施方式可参见上述第一方面的相关内容，此处不再详述。
另一种实施方式中，所述通信装置包括：处理器和收发器；处理器用于控制收发器进行数据/信令收发；
收发器，用于接收来自第二网络设备的第一失败信息，所述第一失败信息包括终端设备与所述装置之间无线链路失败的信息和第一条件切换配置信息，所述装置是所述终端设备接入的主小区组所属的装置，所述第二网络设备是所述终端设备接入的辅小区组所属的网络设备；收发器，还用于向所述第二网络设备发送第一响应信息，所述第一响应消息包括第一指示信息或第一小区的小区标识；
其中，所述第一指示信息用于指示所述终端设备从所述第一条件切换配置信息配置的候选小区中选择接入的小区，所述第一小区是所述终端设备的待切换小区且是所述第一条件切换配置信息配置的候选小区中的小区。
另外，该方面中，上行通信装置其他可选的实施方式可参见上述第二方面的相关内容，此处不再详述。
又一种实施方式中，所述通信装置包括：处理器和收发器；处理器用于控制收发器进行数据/信令收发；
收发器，用于接收来自终端设备的第一失败信息，所述第一失败信息包括所述终端设备与第一网络设备之间无线链路失败的信息和第一条件切换配置信息，所述第一网络设备是所述终端设备接入的主小区组所属的网络设备，所述装置是所述终端设备接入的辅小区组所属的装置；收发器，还用于向所述第一网络设备发送所述第一失败信息；收发器，还用于接收来自所述第一网络设备的第一响应信息；收发器，还用于向所述终端设备发送所述第一响应信息；
其中，所述第一响应消息包括第一指示信息或第一小区的小区标识；所述第一指示信息用于指示所述终端设备从所述第一条件切换配置信息配置的候选小区中选择接入的小区；所述第一小区是所述终端设备的待切换小区且是所述第一条件切换配置信息配置的候选小区中的小区。
另外，该方面中，上行通信装置其他可选的实施方式可参见上述第三方面的相关内容，此处不再详述。
又一种实施方式中，所述通信装置包括：处理器和收发器；收发器用于进行数据/信令收发；
处理器，用于如果与第一网络设备之间的无线链路失败，以及与所述第一网络设备之间的快速链路恢复失败且第一定时器未超时，将第一失败信息和第三失败信息记录在第一无线链路失败报告中；处理器，还用于如果与所述第一网络设备之间的无线链路失败，以及与所述第一网络设备之间的快速链路恢复失败且所述第一定时器超时，将所述第一失败信息记录在第二无线链路失败报告中，以及将所述第三失败信息记录在第三无线链路失败报告中；
其中，所述第一失败信息是所述装置与所述第一网络设备之间发生无线链路失败的信息，所述第三失败信息是所述装置执行快速链路恢复失败的信息，所述第一网络设备是所述装置接入的主小区组所属的网络设备，所述第一定时器是所述装置在检测到与所述第一网络设备之间的无线链路失败时开启的。
另外，该方面中，上行通信装置其他可选的实施方式可参见上述第四方面的相关内容，此处不再详述。
又一种实施方式中，所述通信装置包括：处理器和收发器；
收发器，用于接收第一无线链路失败报告；处理器，用于根据所述第一无线链路失败报告，确定终端设备的第二条件切换配置信息；
其中，所述第一无线链路失败报告包括第一失败信息和第三失败信息，或者，包括第一失败信息、第三失败信息和第四失败信息；所述第一失败信息是所述终端设备与所述装置之间发生无线链路失败的信息，所述第三失败信息是所述终端设备执行快速链路恢复失败的信息，所述第四失败信息是所述终端设备进行基于条件切换的恢复失败的信息；所述装置是所述终端设备接入的主小区组所属的装置。
又一种实施方式中，所述通信装置包括：处理器和收发器；
收发器，用于接收第二无线链路失败报告或第三无线链路失败报告；处理器，用于根据所述第二无线链路失败报告或所述第三无线链路失败报告，确定终端设备的第二条件切换配置信息；
其中，所述第二无线链路失败报告包括第一失败信息，所述第三无线链路失败报告包括第三失败信息；或者，所述第二无线链路失败报告包括第一失败信息和第四失败信息，所述第三无线链路失败报告包括第三失败信息；或者，所述第二无线链路失败报告包括第一失败信息，所述第三无线链路失败报告包括第三失败信息和第四失败信息；
所述第一失败信息是所述终端设备与所述装置之间发生无线链路失败的信息，所述第三失败信息是所述终端设备执行快速链路恢复失败的信息，所述第四失败信息是所述终端设备进行基于条件切换的恢复失败的信息，所述装置是所述终端设备接入的主小区组所属的装置。
又一种实施方式中，所述通信装置包括：处理器和收发器；
收发器，用于接收第一无线链路失败报告或第四无线链路失败报告；处理器，用于根据所述第一无线链路失败报告或所述第四无线链路失败报告，确定终端设备的第二条件切换配置信息；
其中，第一无线链路失败报告包括第一失败信息和第三失败信息，所述第四无线链路失败报告包括第四失败信息；所述第一失败信息是所述终端设备与所述装置之间发生无线链路失败的信息，所述第三失败信息是所述终端设备执行快速链路恢复失败的信息，所述第四失败信息是所述终端设备进行基于条件切换的恢复失败的信息；所述装置是所述终端设备接入的主小区组所属的装置。
又一种实施方式中，所述通信装置包括：处理器和收发器；
收发器，用于接收第二无线链路失败报告，或者，接收第三无线链路失败报告，或者，接收第四无线链路失败报告；处理器，用于根据所述第二无线链路失败报告，或所述第三无线链路失败报告，或所述第四无线链路失败报告，确定终端设备的第二条件切换配置信息；
其中，第二无线链路失败报告包括第一失败信息，所述第三无线链路失败报告包括第二失败信息，所述第四无线链路失败报告包括第四失败信息；所述第一失败信息是所述终端设备与所述装置之间发生无线链路失败的信息，所述第三失败信息是所述终端设备执行快速链路恢复失败的信息，所述第四失败信息是所述终端设备进行基于条件切换的恢复失败的信息；所述装置是所述终端设备接入的主小区组所属的装置。
另一种实施方式中，该通信装置为芯片或芯片系统。所述处理单元也可以体现为处理电路或逻辑电路；所述通信单元可以是该芯片或芯片系统上的输入/输出接口、接口电路、输出电路、输入电路、管脚或相关电路等。
在实现过程中，处理器可用于进行，例如但不限于，基带相关处理，收发器可用于进行，例如但不限于，射频收发。上述器件可以分别设置在彼此独立的芯片上，也可以至少部分的或者全部的设置在同一块芯片上。例如，处理器可以进一步划分为模拟基带处理器和数字基带处理器。其中，模拟基带处理器可以与收发器集成在同一块芯片上，数字基带处理器可以设置在独立的芯片上。随着集成电路技术的不断发展，可以在同一块芯片上集成的器件越来越多。例如，数字基带处理器可以与多种应用处理器(例如但不限于图形处理器，多媒体处理器等)集成在同一块芯片之上。这样的芯片可以称为系统芯片(system on a chip，SoC)。将各个器件独立设置在不同的芯片上，还是整合设置在一个或者多个芯片上，往往取决于产品设计的需要。本申请实施例对上述器件的实现形式不做限定。
第十方面，本申请还提供一种处理器，用于执行上述各种方法。在执行这些方法的过程中，上述方法中有关发送上述信息和接收上述信息的过程，可以理解为由处理器输出上述信息的过程，以及处理器接收输入的上述信息的过程。在输出上述信息时，处理器将该上述信息输出给收发器，以便由收发器进行发射。该上述信息在由处理器输出之后，还可能需要进行其他的处理，然后才到达收发器。类似的，处理器接收输入的上述信息时，收发器接收该上述信息，并将其输入处理器。更进一步的，在收发器收到该上述信息之后，该上述信息可能需要进行其他的处理，然后才输入处理器。
对于处理器所涉及的发送和接收等操作，如果没有特殊说明，或者，如果未与其在相关描述中的实际作用或者内在逻辑相抵触，则均可以更加一般性的理解为处理器输出和接收、输入等操作，而不是直接由射频电路和天线所进行的发送和接收操作。
在实现过程中，上述处理器可以是专门用于执行这些方法的处理器，也可以是执行存储器中的计算机指令来执行这些方法的处理器，例如通用处理器。上述存储器可以为非瞬时性(non-transitory)存储器，例如只读存储器(read only memory，ROM)，其可以与处理器集成在同一块芯片上，也可以分别设置在不同的芯片上，本申请实施例对存储器的类型以及存储器与处理器的设置方式不做限定。
第十一方面，本申请还提供了一种通信系统，该系统包括一个或多个网络设备，以及一个或多个终端设备。在另一种可能的设计中，该系统还可以包括与网络设备、终端设备进行交互的其他设备。
第十二方面，本申请提供了一种计算机可读存储介质，用于储存指令，当所述指令被计算机运行时， 实现上述第一方面至第八方面任一项所述的方法。
第十三方面，本申请还提供了一种包括指令的计算机程序产品，当其在计算机上运行时，实现上述第一方面至第八方面任一项所述的方法。
第十四方面，本申请提供了一种芯片系统，该芯片系统包括处理器和接口，所述接口用于获取程序或指令，所述处理器用于调用所述程序或指令以实现或者支持终端设备实现第一方面所涉及的功能，或者实现或者支持第一网络设备实现第二方面所涉及的功能，或者实现或者支持第二网络设备实现第三方面所涉及的功能，或者实现或支持终端设备实现第四方面所涉及的功能，或者实现或支持第一网络设备实现第五方面至第八方面任一方面所涉及的功能。例如，确定或处理上述方法中所涉及的数据和信息中的至少一种。在一种可能的设计中，所述芯片系统还包括存储器，所述存储器，用于保存终端必要的程序指令和数据。该芯片系统，可以由芯片构成，也可以包括芯片和其他分立器件。
第十五方面，本申请提供一种通信装置，包括处理器，用于执行存储器中存储的计算机程序或可执行指令，当计算机程序或可执行指令被执行时，使得该装置执行如第一方面至第八方面任一方面各个可能的实现中的方法。
在一种可能的实现中，处理器和存储器集成在一起；
在另一种可能的实现中，上述存储器位于该通信装置之外。
第九方面到第十五方面的有益效果可以参考第一方面到第八方面的有益效果，此处不再赘述。
附图说明
图1是本申请实施例提供的一种通信系统的系统结构示意图；
图2是本申请实施例提供的一种网络设备的结构示意图；
图3是本申请实施例提供的另一种网络设备的结构示意图；
图4是本申请实施例提供的一种条件切换的过程示意图；
图5是本申请实施例提供的一种多模-双连接中各小区的架构示意图；
图6是本申请实施例提供的一种通信方法的交互示意图；
图7是本申请实施例提供的一种多设备之间的交互流程示意图；
图8是本申请实施例提供的另一种通信方法的交互示意图；
图9是本申请实施例提供的另一种多设备之间的交互流程示意图；
图10是本申请实施例提供的一种通信装置的结构示意图；
图11是本申请实施例提供的另一种通信装置的结构示意图。
具体实施方式
下面结合本申请实施例中的附图对本申请实施例中的技术方案进行清楚、完整的描述。
为了清楚的描述实施例，下文先对本发明涉及的一些术语或概念进行简单说明。
一.通信系统。
为了更好的理解本申请实施例公开的通信方法，对本申请实施例适用的通信系统进行描述。
本申请实施例可应用于第五代移动通信(5th generation mobile communication，5G)系统、第六代移动通信(6th generation mobile communication，6G)系统、卫星通信及短距等无线通信系统中。无线通信系统可以包括一个或多个网络设备，以及一个或多个终端设备。无线通信系统也可以进行点对点通信，如多个终端设备之间互相通信。图1的通信系统以网络设备包括网络设备1和网络设备2，终端设备为终端设备1，终端设备1可同时与网络设备1和网络设备2通信，且网络设备1与核心网的移动性管理实体(mobility management entity，MME)连接，网络设备2与核心网的服务网关(serving gate way，S-WG)连接为例。
本申请实施例提及的无线通信系统包括但不限于：窄带物联网系统(narrow band-internet of things，NB-IoT)、长期演进系统(long term evolution，LTE)，5G/6G移动通信系统的三大应用场景：增强移动宽带(enhanced mobile broadband，eMBB)、超可靠低时延通信(ultra reliable low latency communication，URLLC)和海量机器类通信(massive machine type of communication，mMTC)，无线保真(wireless fidelity，WiFi)系统，或者5G之后的移动通信系统等。
本申请实施例中，网络设备是具有无线收发功能的设备，用于与终端设备进行通信。例如，网络设备 是将终端设备接入到无线网络的无线接入网(radio access network，RAN)节点。RAN节点包括但不限于是：gNB、传输接收点(transmission reception point，TRP)、演进型节点B(evolved Node B，eNB)、无线网络控制器(radio network controller，RNC)、节点B(Node B，NB)、基站控制器(base station controller，BSC)、基站收发台(base transceiver station,BTS)、家庭基站(例如，home evolved NodeB，或home Node B，HNB)、基带单元(base band unit，BBU)，或无线保真(wireless fidelity，Wifi)接入点(access point，AP)、接入回传一体化(integrated access and backhaul，IAB)等。
在一种网络结构中，网络设备可以包括集中单元(centralized unit，CU)、或包括分布单元(distributed unit，DU)、或包括CU和DU的RAN设备。
在一种网络结构中，如图2所示，网络设备包括CU和DU。其中，CU可以划分为控制面(control plane)和用户面(user plane)，即CU包括CU-CP和CU-UP。其中，CU-CP负责控制面功能，主要包含无线资源控制(radio resource control，RRC)和分组数据汇聚协议-控制面(packet data convergence protocol control plane，PDCP-C)。PDCP-C主要负责控制面数据的加解密、完整性保护、数据传输等。CU-UP负责用户面功能，主要包含服务数据适配协议(service data adaptation protocol，SDAP)和分组数据汇聚协议-用户面(packet data convergence protocol user plane，PDCP-U)。其中，SDAP主要负责将核心网的数据进行处理并将映射到承载。PDCP-U主要负责数据面的加解密、完整性保护、头压缩、序列号维护、数据传输等。另外，CU-CP和CU-UP通过E1接口连接，CU-CP通过F1-C接口和DU连接，CU-UP通过F1-U接口和DU连接。还有一种可能的实现是PDCP-C也在CU-UP中。DU包括无线链路控制(radio link control，RLC)、介质访问控制(media access control，MAC)和物理(physical，PHY)。
在另一种网络结构中，如图3所示，网络设备包括CU和两个DU。其中，CU包括RRC、SDAP和PDCP，DU包括RLC、MAC和PHY。CU均通过F1接口和两个DU连接。
网络设备可以和核心网设备进行通信交互，向终端设备提供通信服务。核心网设备例如为5G网络核心网(core network，CN)中的设备。核心网作为承载网络提供到数据网络的接口，为终端提供通信连接、认证、管理、策略控制以及对数据业务完成承载等。
本申请实施例所涉及到的终端设备是一种具有无线收发功能的设备。终端设备可以部署在陆地上，包括室内或室外、手持或车载；也可以部署在水面上(如轮船等)；还可以部署在空中(例如飞机、气球和卫星上等)。终端设备可以是用户设备，也可以是芯片或者某一设备内部的功能模块。所述终端设备可以是手机(mobile phone)、平板电脑(pad)、带无线收发功能的电脑、虚拟现实(virtual reality，VR)终端设备、增强现实(augmented reality，AR)终端设备、工业控制(industrial control)中的无线终端设备、无人驾驶(self driving)中的无线终端设备、远程医疗(remote medical)中的无线终端设备、智能电网(smart grid)中的无线终端设备、运输安全(transportation safety)中的无线终端、智慧城市(smart city)中的无线终端设备、智慧家庭(smart home)中的无线终端或者未来通信网络中的无线终端等，以及还可以包括用户设备(user equipment，UE)等，本申请不作限制。
二.相关概念。
为了更好的理解本申请实施例公开的通信方法，对本申请实施例涉及的相关概念进行简单的介绍。
1.条件切换(conditional handover，CHO)。
CHO机制：源基站在与终端设备的源链路信号质量较好时，向终端设备发送CHO配置信息，该CHO配置信息中包括一个或多个候选小区的信息(比如，候选小区的全球小区标识(cell global identifier，CGI))、CHO触发条件，或者，候选小区的物理小区标识(physical cell Identifier，PCI)以及每个候选小区对应的频率信息。终端设备接收到源基站配置的CHO配置信息后，确定该CHO配置信息配置的候选小区的小区质量是否满足CHO触发条件，将满足CHO触发条件的小区作为目标切换小区，并向该切换目标小区发起随机接入信道(random access channel，RACH)。终端设备随机接入目标切换小区成功时，终端设备向目标切换小区所属的基站(即目标基站)发送CHO完成消息，以通知目标基站与该目标基站的条件切换完成。
示例性的，图4为终端设备进行条件切换的过程。如图4所示，终端设备与源基站通信，源基站向终端设备发送RRC重配置信息，该RRC重配置信息包括测量配置信息。终端设备根据测量配置信息对邻小区进行测量，并将测量结果以测量报告(measurement report)的方式上报给源基站。源基站根据测量报告确定邻小区信号质量较好的小区，并分别向信号质量较好的邻小区所属的候选基站1和候选基站2发送CHO请求。如果源基站均收到候选基站1和候选基站2回复的CHO请求确认应答(conditional handover  request acknowledge，CHO requestACK)，源基站与候选基站1和候选基站2之间完成了CHO交互。源基站在向终端设备发送CHO配置信息，该CHO配置信息包括候选基站1所属的候选小区1、候选基站2所属的候选小区2，以及候选小区1和候选小区2分别对应的CHO触发条件(比如，CHO触发条件为信号质量阈值)。如果终端设备确定与候选小区1之间的信号质量满足CHO触发条件，向候选基站1发起RACH。终端设备在RACH完成后，向候选基站1发送CHO完成消息，以通知候选基站1与该候选基站1的条件切换完成。
2.多模双连接(multi-radio dual connectivity，MR-DC)、主基站(master node，MN)、辅基站(secondary node，SN)、主小区(primary cell，Pcell)、主辅小区(primary secondary cell，PSCell)、主小区组(master cell group，MCG)、辅小区组(secondary cell group，SCG)。
多模双连接：无线网络中，一个终端设备同时与多个网络设备进行通信的通信方式。MR-DC也可被称为双连接(dual-connectivity，DC)。MR-DC中，与终端设备同时通信的多个网络设备可以是属于同一个无线接入技术(radio access technology，RAT)的网络设备，比如该多个网络设备均是4G基站，或者均是5G基站；或者，与终端设备同时通信的多个网络设备也可以是不同RAT的网络设备，比如该多个网络设备中的部分网络设备是4G基站，其余部分网络设备是5G基站。
MR-DC中，与核心网和有控制面信令交互的基站称为主基站MN，其他与终端设备连接的基站称为辅基站SN。如图1所示，与终端设备1连接的网络设备包括网络设备1和网络设备2，且网络设备1与核心网的移动性管理实体连接，网络设备1和网络设备2均与服务网关连接，则网络设备1为终端设备1的主基站MN，网络设备2为终端设备1的辅基站SN。
MR-DC中，MN为终端设备服务的小区中存在一个主小区(Pcell)，SN为终端设备服务的小区中存在一个主辅小区(PSCell)。其中，主小区(Pcell)是指部署在主频点，且终端设备在小区发起初始连接建立过程或发起连接重建过程，或者在切换过程中指示为主小区的小区。主辅小区(PSCell)是指终端设备在辅基站发起随机接入过程的小区，或者当终端设备在辅基站改变过程中跳过随机接入过程发起数据传输的小区，或者执行同步的重配过程中发起随机接入的辅基站的小区。
终端设备可以接收来自一个基站所属的多个小区的服务，MN为终端设备提供服务的小区组称为主小区组(MCG)，SN为终端设备提供服务的小区组称为辅小区组(SCG)。MCG和SCG中分别至少包含一个cell。MCG中仅包含一个cell时，该cell为终端设备的PCell。SCG中仅包含一个cell时，该cell为终端设备的PSCell。新空口(new radio，NR)中，将PCell和PSCell称为特别小区(special cell，SpCell)。当MCG或SCG中包含多个小区时，除了SpCell之外的小区均被称为辅小区(secondary cell，SCell)。辅小区是指工作在辅载波上的小区。
图5为MR-DC中各种小区的架构示意图。如图5所示，终端设备与多个网络设备建立连接时，为终端设备服务的小区组包括MCG和SCG。MCG中包括Pcell和其他SCell，SCG中包括PSCell和其他SCell。小区组中的SCell与SpCell进行载波聚合(carrier Aggregation，CA)，即终端设备同时使用多个小区(载波)进行上下行通信，以支持高速数据传输。
3.快速主小区组链路恢复(fast MCG link recovery)。
R15协议中，终端设备检测到主小区组的无线链路失败(radio link failure，RLF)，即检测到该终端设备与MN之间的链路发生无线链路失败时，终端设备发起RRC连接重建立，以恢复与MCG之间的连接。然而，终端设备进行RRC连接重建立，会带来长时间的数据中断，比如，存在90ms～130ms的数据中断。
为避免终端设备在检测到与MCG的RLF时直接进行RRC连接重建立，R16协议提出fast MCG link recovery流程。fast MCG link recovery流程是指：终端设备检测到与MCG之间发生RLF，也即与MN之间发生RLF时，通过SN向MCG发送终端设备与MCG之间无线链路连接失败的失败信息，并通过SN接收来自MN的响应信息，该响应信息包括终端设备接入或切换小区的小区信息，比如，响应信息包括切换(handover)消息或RRC重释放(RRCRelease)消息。终端设备可通过分离(split)的信令无线承载(signaling radio bearer，SRB)1或SRB3向SN上报MCG failure information，并启动T316定时器(timer)。在T316计时期间，如果终端设备通过SN接收到MN发送的响应信息，则终端设备进行fast MCG link recovery流程成功，否则终端设备进行fast MCG link recovery流程失败，终端设备进行RRC连接重建立。
其中，SRB3使用NR-专用控制信道(dedicated control channel，DCCH)逻辑信道。SRB3的调度优先级高于所有的数据无线承载(data radio bearer，DRB)的调度优先级。split SRB1和SRB3的默认调度优先级相同，终端设备不需要在SRB1和SRB3之间对RRC消息进行重排序。
SN为SRB3选择加密和完整性保护算法，并在SCG configuration中提供给MN。SN决定建立SRB3， SN通过SN RRC消息提供SRB3配置。SRB3的建立和释放在辅节点添加和变更流程中完成，SRB3重配置在辅节点修改流程中完成。当终端设备与SCG之间的连接释放时，SRB3被释放。
在不涉及MN的流程中，SRB3可以用于发送SN RRC重配置(SN RRC Reconfiguration)信息、SN RRC重配置完成(SN RRC Reconfiguration Complete)信息、SN测量报告(SN Measurement Report)、SN失败信息(SN Failure Information)、SN UE协助信息消息(SN UE Assistance Information)和SN IAB其他信息(SN IAB Other Information)。SN RRC Reconfiguration Complete消息与发起流程的消息映射到同一个SRB上。SN测量报告消息映射到SRB3，如果配置的话，无论配置是直接从SN接收还是通过MN接收。MN RRC消息不会映射到SRB3。
如果split SRB1未被配置，则SRB3可以用于终端设备在UL Information Transport MR-DC消息中向MN发送封装的MCG失败信息消息，并响应接收DL Information Transfer MRDC消息中封装的RRC reconfiguration、Mobility From NR Command、RRC release消息。
在所有MR-DC情况下，SRB1和SRB2都支持split SRB，SRB0和SRB3不支持split SRB。Split SRB上的RRC协议数据单元(protocol data unit，PDU)通过NR PDCP加密和完整性保护。Split SRB由MN在辅节点添加和变更流程中配置，SN配置部分由SN提供。终端设备可以同时配置split SRB1、split SRB2和SRB3。SRB3和split SRB的SCG分支可以独立配置。
4.移动鲁棒性优化(mobility robustness optimization，MRO)机制、无线链路失败报告(RLF report)。
MRO机制是指：终端设备发生与移动性相关的异常情况(比如终端设备切换失败，终端设备在目标小区的无线链路失败等)时，向网络设备上报发生移动性相关的异常参数，网络设备根据该相关的异常参数进行自主分析、优化网络参数等。
目前MRO机制中，网络设备会基于性能指标的反馈来调整移动性参数，性能指标的反馈可以是通过RLF report或成功切换报告(successful handover report，SHR)等报告来反馈，移动性参数是在判断切换过程中用到的参数，比如切换的阈值等。MRO机制可减少因网络参数设置不合理而导致的同频切换、异频切换、异系统切换等切换中的切换过早、切换过晚以及乒乓切换等问题。
其中，RLF report包括但不限于以下信息中的一种或多种：
1.失败的主小区标识(failed Pcell Identification，failed Pcell ID)。failed Pcell ID包括终端设备检测到RLF的小区信息，或者切换失败(handover failure，HOF)的目标小区信息。
2.连接失败类型(connection failure type)。connection failure type包括终端设备发生RLF，或者终端设备切换失败，或者终端设备启动的定时器(比如发送测量报告后启动的T312定时器)到期等失败类型。
3.源主小区标识(previous PCell ID)。previous PCell ID包括终端设备上一次接收到切换命令的源小区信息。
4.重建小区标识(reestablishment Cell Id)。reestablishment Cell Id包括终端设备连接失败后发起RRC连接重建立的小区信息。
5.连接失败时间(time Conn Failure)。time Conn Failure包括终端设备最后一次收到HO命令到连接失败的时间。
6失败时间(time Since Failure)。time Since Failure包括终端设备连接失败时开始记录的时间长度，一般指终端设备连接失败到上报RLF report的时间。
7.无线链路失败原因(rlf-Cause)。rlf-Cause包括终端设备发生无线链路失败的原因，或者切换失败的原因。例如，rlf-Cause为T310超时，或者为随机接入问题(random Access Problem)，或者为RLC重传失败过多等。
上述所涉及到的小区信息可包括CGI，和/或，PCI与频率。此外，RLF report中还可包括各小区的小区质量，比如检测到链路失败时的失败小区和/或邻区的小区质量。可选的，小区信息还可包括小区的测量结果。
本申请公开的实施例将围绕包括多个设备、组件、模块等的系统来呈现本申请的各个方面、实施例或特征。应当理解和明白的是，各个系统可以包括另外的设备、组件、模块等，并且/或者可以并不包括结合附图讨论的所有设备、组件、模块等。此外，还可以使用这些方案的组合。
本申请实施例中的第一、第二、第三、第四是为了便于表述上的区别而进行的命名，不造成实质性限定，且没有顺序等限定。
本申请实施例中，第一网络设备是终端设备接入的主小区组所属的网络设备，也可将第一网设备看作是终端设备的源主基站(源MN)。第二网络设备是终端设备接入的辅小区组所属的网络设备，也可将第二 网络设备看作是终端设备的辅基站(SN)。
第三网络设备是终端设备基于第一网络设备发送的第一响应信息接入小区失败后重新接入成功的网络设备，或者是终端设备进行基于条件切换的恢复失败后重新接入成功的网络设备。第三网络设备可理解为是终端设备基于第一网络设备发送的第一响应信息接入小区失败后，进行RRC连接重建立成功的网络设备；或者可理解为是终端设备进行RRC连接重建立失败后，回到空闲(idle)态进行小区选择，接入成功的小区所属的网络设备；或者可理解为是终端执行基于条件切换的恢复接入成功的网络设备，或者可以理解为是终端设备进行基于条件切换的恢复失败后，进行RRC连接重建立成功的网络设备；或者可以理解为是终端设备进行基于条件切换的恢复失败后，且进行RRC连接重建立失败后，回到空闲(idle)态进行小区选择，接入成功的小区所属的网络设备。第三网络设备也可被看作是终端设备进行基于条件切换的恢复接入成功的目标MN，或者是进行RRC连接重建立成功的目标MN，或者是终端设备进行RRC连接重建立失败后，进行小区选择，接入成功的小区所属于的目标MN。
第四网络设备是终端设备在进行小区选择，选择的小区是第一条件切换配置信息配置的候选小区中的小区时，向该选择的小区接入成功时，接入的小区所属的网络设备。
实施例一
本申请实施例提出一种通信方法100，图6是该通信方法100的交互示意图。该通信方法100从终端设备、第一网络设备、第二网络设备的交互角度进行阐述。该通信方法100包括但不限于以下步骤：
S101.终端设备在与第一网络设备之间的无线链路失败时，向第二网络设备发送第一失败信息，第一失败信息包括第一条件切换配置信息。相应的，第二网络设备接收来自终端设备的第一失败信息。
其中，第一网络设备和第二网络设备可参见上述所述，不再赘述。
终端设备与第一网络设备之间的无线链路失败，可理解为终端设备与第一网络设备之间的链路发生了无线链路失败，或者可理解为终端设备与主小区组之间断开了连接。终端设备在与第一网络设备之间的无线链路失败后，终端设备与辅小区之间的连接仍存在，从而终端设备可向辅小区所属的第二网络设备发送第一失败信息，以使得第二网络设备向第一网络设备转发终端设备的第一失败信息。
第一失败信息是终端设备与第一网络设备之间发生无线链路失败(radio link failure，RLF)的失败信息。第一失败信息可以是终端设备通过无线链路失败报告(RLF report)的形式发送给第二网络设备的，从而第一失败信息包括但不限于上述RLF report中包括的信息。例如，第一失败信息包括failed Pcell ID，且failed Pcell ID被记录为主小区组中主小区的小区标识。再例如，第一失败信息包括connection failure type，且connection failure type被记录为终端设备过晚进行条件切换。
第一失败信息还包括第一条件切换配置信息，该第一条件切换配置信息是第一网络设备在与终端设备之间的信号质量大于预设阈值时，向终端设备配置的。第一条件切换配置信息包括一个或多个候选小区、该一个或多个候选小区中每个小区的无线空口配置和每个小区的切换执行触发条件的一种或者多种。
该方式中，终端设备在与第一网络设备之间发生无线链路失败时，向第二网络设备发送第一失败信息，以使得第二网络设备将接收的第一失败信息转发给第一网络设备。
S102.第二网络设备向第一网络设备发送第一失败信息。相应的，第一网络设备接收来自第二网络设备的第一失败信息。
终端设备在与第一网络设备之间发生无线链路失败时，通过第二网络设备向第一网络设备上报了携带第一条件切换配置信息的第一失败信息。该方式不仅使得第一网络设备获得终端设备与第一网络设备之间发生无线链路失败的相关信息，还有利于第一网络设备后续基于第一条件切换配置信息对终端设备的条件切换配置信息的优化。
S103.第一网络设备向第二网络设备发送第一响应信息，第一响应信息包括第一指示信息或第一小区的小区标识。相应的，第二网络设备接收来自第一网络设备的第一响应信息。
其中，第一指示信息用于指示终端设备从第一条件切换配置信息配置的候选小区中选择接入的小区，第一小区是终端设备的待切换小区且是第一条件切换配置信息配置的候选小区中的小区。待切换小区是指终端设备的目标切换小区，即第一小区是终端设备的目标切换小区且是第一条件切换配置信息配置的候选小区中的小区。
第一指示信息也可理解为CHO based recovery信息，以指示终端设备从第一条件切换配置信息配置的候选小区中选择待接入的小区。
另一种可选的实施方式中，第一指示信息用于指示终端设备从第一条件切换配置信息配置的候选小区 中选择接入的小区和/或条件切换配置标识。也就是说，第一指示信息用于指示终端设备从第一条件切换配置信息配置的候选小区中选择接入的小区和对应的无线空口配置，或者，用于指示条件切换配置标识，或者用于指示终端设备将该条件切换配置作为第一条件切换配置信息。
一种可选的实施方式中，第一网络设备统计第一时延，第一时延为第一网络设备与第二网络设备的站间交互平均时延。
本申请实施例中，时延的定义为：从发送消息到接收对应响应消息之间的时间差。也就是说，第一时延可以是从第一网络设备向第二网络设备发送辅站添加/修改/释放/变更请求信息到接收到来自第二网络设备的响应信息如辅站添加/修改/释放/变更请求确认消息之间的时间差。
该站间交互平均时延可以是Xn口时延，可以是X2口时延，也可以是基于NG口和/或S1口的时延。Xn口是NR站点之间的通信接口，X2口是NR站点与LTE站点的通信接口。如果没有Xn口和X2口，两个站点之间的通信则通过核心网的NG(NR站点<->NR核心网)和/或S1口(4G核心网<->LTE站点)来转发来实现通信。
该方式中，第一网络设备统计了第一网络设备与第二网络设备的站间交互平均时延，因此，第一网络设备可获知第一时延测量信息。从而有利于第一网络设备在终端设备执行快速链路恢复失败时，根据第一时延测量信息，确定终端设备执行快速链路恢复失败的原因是否是第一网络设备与第二网络设备的站间交互平均时延(即第一时延)过大造成的。例如，第一时延大于第三预设值，第一网络设备确定终端设备执行快速链路恢复失败的原因可能是第一时延过大造成的，并根据该第一时延测量信息合理配置T316门限，减少终端设备执行快速链路恢复失败的概率。
S104.第二网络设备向终端设备发送第一响应信息。相应的，终端设备接收来自第二网络设备的第一响应信息。
可理解的，第一网络设备接收到第一失败信息后，通过第二网络设备向终端设备发送第一响应信息。第一响应消息包括第一指示信息或第一小区的小区标识，从而终端设备可基于第一指示信息向在第一条件切换配置信息配置的候选小区中选择的小区接入，或者直接向第一小区切换。终端设备基于第一指示信息在第一条件切换配置信息配置的候选小区选择接入的小区时，是基于小区选择原则在第一条件切换配置信息配置的候选小区选择接入的小区。小区选择原则包括信号质量阈值。例如，终端设备在第一条件切换配置信息配置的候选小区中满足小区选择的信号质量阈值时，将其候选小区作为终端设备待接入的小区。
终端设备接收到第一响应后，根据第一响应信息进行小区接入或小区切换。终端设备根据第一响应信息接入或者切换小区时，待接入的小区或待切换的小区为第一条件切换配置信息配置的候选小区中的小区，从而可提高终端设备接入或切换小区的成功率，有利于终端设备及时接入第一条件切换配置信息配置的候选小区中的小区，有利于快速恢复终端设备与主小区组之间的无线链路。
可选的，第一响应消息包括第一指示信息，第一指示信息用于指示终端设备从第一条件切换配置信息配置的候选小区中选择接入的小区和对应的无线空口配置时，终端设备直接从第一条件切换配置信息配置的候选小区中选择接入的小区，并采用对应的无线空口配置接入选择的小区。
可选的，第一响应消息包括第一指示信息，第一指示信息用于指示条件切换配置标识，终端设备根据该条件切换配置标识，确定该条件切换配置标识对应的第一条件切换配置信息，并在该第一条件切换配置信息配置的候选小区中选择接入的小区，接入选择的小区。
可选的，第一响应信息包括第一指示信息，第一指示信息用于指示终端设备将该条件切换配置信息作为第一条件切换配置信息时，终端设备也可直接从第一条件切换配置信息配置的候选小区中选择接入的小区，并接入选择的小区。
一种可选的实施方式中，终端设备如果接入第一小区或第二小区失败，或者接入第一小区或第二小区成功且在预设时长内发生无线链路失败，进行无线资源控制连接重建立(RRC连接重建立)。第二小区是终端设备根据第一指示信息选择接入的小区，即是终端设备根据第一指示信息在第一条件切换配置信息配置的候选小区中选择的待接入的小区。
终端设备接入第一小区或第二小区失败，是指终端设备未接入第一小区或第二小区。终端设备接入第一小区或第二小区失败，可能是从第一条件切换配置信息配置的小区中选择接入或切换的小区时，选择的小区不合适，或者可能是第一条件切换配置信息配置的候选小区不合理。
终端设备接入第一小区或第二小区成功且在预设时长内发生无线链路失败，表明终端设备曾成功接入第一小区或第二小区，只是在较短时间内发生无线链路失败。但终端设备接入第一小区或第二小区成功且在预设时长内发生无线链路失败，也被认为终端设备未成功接入小区，即未与目标网络设备建立连接。
因此，终端设备在接入第一小区或第二小区失败时，或者，接入第一小区或第二小区成功且在预设时长内发生无线链路失败时，均进行RRC连接重建立，以尝试通过RRC连接重建立的方式接入目标小区，恢复与主小区组之间的无线链路。
另一种可选的实施方式中，终端设备如果接入第一小区或第二小区失败，或者接入第一小区或第二小区成功且在预设时长内发生无线链路失败，还可记录第二失败信息，并向第三网络设备发送失败报告，该失败报告包括第二失败信息。相应的，第三网络设备可接收来自终端设备的失败报告，并将该失败报告转发给第一网络设备。从而第一网络设备接收来自第三网络设备的失败报告。
其中，第二失败信息包括第一响应消息的消息指示类型，还包括终端设备根据第一响应消息接入第一小区或第二小区失败，或者，接入第一小区或第二小区成功且在预设时长内发生无线链路失败。第一响应消息的消息指示类型指示第一响应消息包括第一指示信息或第一小区的小区标识。
第一响应消息的消息指示类型可以是通过比特的方式隐式指示第一响应信息包括第一指示信息或第一小区的小区标识。例如，用于指示第一响应消息的消息指示类型的比特为0时，指示第一响应消息包括第一指示信息，用于指示第一响应消息的消息指示类型的比特为1时，指示第一响应消息包括第一小区的小区标识。相反的，用于指示第一响应消息的消息指示类型的比特为0时，也可指示第一响应消息包括第一小区的小区标识，用于指示第一响应消息的消息指示类型的比特为1时，也可指示第一响应信息包括第一指示信息。本申请实施例不限定具体的隐式指示方式。
可选的，第一响应消息的消息指示类型还可以是通过直接指示的方式，指示第一响应消息包括第一指示信息或第一小区的小区标识。例如，第一响应消息的消息指示类型通过第四指示信息的方式直接指示，第四指示信息用于指示第一响应信息包括第一指示信息，或者第四指示信息用于指示第一小区的小区标识。
第二失败消息还包括终端设备接入第一小区或第二小区失败，或者接入第一小区或第二小区成功且在预设时长内发生无线链路，是指第二失败信息还包括终端设备根据第一响应消息接入目标小区失败的原因。第二失败信息包括但不限于上述RLF report中的相关参数信息，不再赘述。
另外，第三网络设备是终端设备重新接入成功的网络设备。从而终端设备通过第三网络设备将携带第二失败信息的失败报告上报给第一网络设备，以使得第一网络设备获得终端设备根据第一响应信息接入目标小区失败的失败原因。
另一种可选的实施方式中，第二失败信息还包括第二指示信息，第二指示信息用于指示终端设备接收第一响应消息的小区为主小区组中的主小区。该第一响应消息是终端设备记录第二失败信息之前最后一次收到的消息。
由上述RLF report可知，第二失败信息可包括终端设备接收上一次命令/消息的源小区信息。终端设备记录第二失败信息之前接收的上一次消息为第一响应消息，且该第一响应消息的第一网络设备通过第二网络设备发送给终端设备的，即终端设备接收第一响应消息的源小区为主小区组中主小区。因此，第二失败信息还包括第二指示信息，以通过第二指示信息向第一网络设备上报终端设备记录第二失败信息之前最后一次接收的第一响应消息来自于主小区组中的主小区。
一种可选的实施方式中，终端设备直接将第二指示信息中的previous PCell ID记录为主小区组中主小区的小区标识，以指示终端设备记录第二失败信息之前接收最后一次消息的源小区为主小区组中的主小区。
另一种可选的实施方式中，终端设备按照目前协议中的记录方式，将第二指示信息中的previous PCell ID记录为辅小区组中辅小区的小区标识，并新增信元，比如新增源实际主小区的小区标识(previous Actual PCell Id)，且将previous Actual PCell Id记录为主小区组中主小区的小区标识。也就是说，终端设备通过previous PCell ID指示终端设备记录第二失败信息之前最后一次接收的消息是从辅小组中辅小区接收的，且通过previous Actual PCell Id指示终端设备记录第二失败信息之前最后一次接收的消息实际来源于主小区组中主小区。
该方式中，终端设备可在第二指示信息中通过上述两种方式灵活指示终端设备记录第二失败信息之前最后一次接收的第一响应消息来自于主小区组中的主小区。
一种可选的实施方式中，第一网络设备接收到失败报告后，还可将第一失败信息和失败报告关联。第一网络设备将第一失败信息和失败报告关联，可指第一网络设备采用相同的标识，对第一失败信息和失败报告进行标识，以使得后续分析终端设备发生无线链路失败的原因时，根据被标记有相同标识的第一失败信息和失败报告分析。
可选的，第一网络设备将第一失败信息和失败报告关联，也可指第一网络设备将第一失败信息记录在失败报告中，获得关联后的失败报告，或者将失败报告记录在第一失败信息中，获得关联后的失败信息， 后续第一网络设备基于关联后的失败报告或关联后的失败信息，分析终端设备发生无线链路失败的原因。
本申请实施例对第一网络设备将第一失败信息和失败报告关联的方式不作限定，即第一网络设备将第一失败信息和失败报告关联的方式包括但不限于上述两种方式。
一种可选的实施方式中，第一失败信息包括终端设备根据第一响应信息接入第一小区或第二小区失败，表明终端设备未成功接入第一小区或第二小区，终端设备的服务小区未发生变化，那么终端设备的小区无线网络临时标识(cell radio network temporary identifier，RNTI)仍然是主小区的RNTI。因此，终端设备可基于第一失败信息和失败报告中携带相同的RNTI，以及失败报告是与第一失败信息的记录时间最接近的失败报告的原则，将第一失败信息和失败报告关联。
也就是说，第二失败信息包括终端设备根据第一响应消息接入第一小区或第二小区失败时，失败报告携带的小区无线网络临时标识和第一失败信息携带的小区无线网络临时标识相同，且失败报告是与第一失败信息的记录时间最接近的失败报告。
另一种可选的实施方式中，第二失败信息包括终端设备根据第一响应消息接入第一小区或第二小区成功且在预设时长内发生无线链路失败，表明终端设备根据第一响应信息曾接入第一小区或第二小区成功，那么终端设备的服务小区发生了变化，即终端设备的RNTI也发生了变化。然而，终端设备的第一条件切换配置信息未发生变化，第一条件切换配置信息配置的候选小区未发生变化，那么终端设备可基于失败报告中携带的候选小区的小区标识所对应的小区是第一条件切换配置信息配置的候选小区中的小区，以及失败报告是与第一失败信息的记录时间最接近的失败报告的原则将第一失败信息和失败报告关联。
也就是说，第二失败信息包括终端设备根据第一响应消息接入第一小区或第二小区成功且在预设时长内发生无线链路失败时，失败报告携带的候选小区标识所对应的小区是第一失败信息中第一条件切换配置信息配置的候选小区中的小区，且失败报告是与第一失败信息的记录时间最接近的失败报告。
第一网络设备将第一失败信息和失败报告关联，可使得第一网络设备基于关联后的信息优化终端设备的条件切换配置信息。例如，第一失败信息包括的终端设备与第一网络设备发生无线链路失败的原因是终端设备太晚向第三小区进行CHO导致，失败报告携带的第二失败信息包括终端设备根据响应信息接入第一小区失败，第一条件切换配置信息配置的候选小区包括小区a、小区b、小区c。如果第一小区和第三小区均是小区a，表明小区a可能是第一网络设备配置的不合理的候选小区，那么第一网络设备在优化终端设备的条件切换配置信息时，可将小区a从第一条件切换配置信息配置的候选小区中删除。如果第三小区是小区a，第一小区是小区c，表明第一条件切换配置信息配置的小区a的CHO触发条件可能不合理，导致终端设备在与第一网络设备之间的信号质量较差时，仍未触发向小区a进行CHO，从而第一网络设备可修改第一条件切换配置信息中小区a的CHO触发条件。另外，小区c可能不是合理的候选小区，可将小区c从第一条件切换配置信息中删除。
一种可选的实施方式中，第二网络设备还可统计第二时延和第三时延。其中，第二时延为第二网络设备与第一网络设备交互第一失败信息和第一响应信息的站间交互平均时延，或者为第二网络设备与第一网络设备的站间交互平均时延。也就是说，第二时延可以是从第一网络设备向第二网络设备发送第一失败消息，或者是辅站添加/修改/释放/变更请求信息到接收到来自第二网络设备的第一响应信息，或者是辅站添加/修改/释放/变更请求确认消息之间的时间差。第三时延为第二网络设备与终端设备交互第一失败信息和第一响应信息的空口交互平均时延，或者为第二网络设备与终端设备的空口交互平均时延，空口交互平均时延分为上行时延和下行时延。上行时延包括两段，如D1段和D2段，该D1段是终端设备上报的，D2段是第二网络设备统计的。
第二时延可理解为是从第二网络设备向第一网络设备发送第一失败信息，到收到来自于第一网络设备的第一响应信息之间的时间差，或者可理解为是从第一网络设备发送消息，该消息包括但不限于辅站添加/修改/释放/变更请求信息，到接收到来自于第二网络设备的对应响应信息之间的时间差。第三时延可理解为是从终端设备向第二网络设备发送第一失败信息，到第二网络设备接收到该第一失败信息的时间差，或者可以理解为是从第二网络设备向终端设备发送第一响应信息，到终端设备接收到该第一响应信息的时间差，也可以是终端设备与第二网络设备控制面信令的上行时延和下行时延，可以直接采纳已有的用户面数据包的上行时延和下行时延结果，即每个终端设备的每个数据无线承载的粒度的时延统计结果。也可以参考用户面数据包的统计方式，按照每个终端设备的每个信令无线承载的粒度统计控制面信令的上行时延和下行时延。
该方式中，第二网络设备统计了第二时延和第三时延，从而第二网络设备可获知第二时延测量信息和第三时延测量信息，从而有利于第二网络设备向第一网络设备发送第二时延测量信息和第三时延测量信息， 进而有利于第一网络设备在终端设备执行快速链路恢复失败时，分别基于第二时延测量信息中的第二时延和第三时延测量信息中的第三时延，确定终端设备执行快速链路恢复失败的原因。例如，若第二时延大于第一预设值，则第一网络设备确定终端设备执行快速链路恢复失败的原因可能是第二时延过大造成的。再例如，若第三时延大于第二预设值，则第一网络设备确定终端设备执行快速链路恢复失败的原因可能是第三时延过大造成的。
第一网络设备获得第二时延测量信息和/或第三时延测量信息后，根据第二时延测量信息和/或第三时延测量信息，合理配置T316门限，以减少终端设备执行快速链路恢复失败的概率。
以下以第一网络设备是终端设备的源MN，第二网络设备是终端设备的SN，第三网络设备是和第四网络设备均是第一条件切换配置信息配置的候选小区所属的网络设备，分别是MN-A1、MN-A2，详细介绍通信方法100中终端设备、源MN、SN、MN-A1、MN-A1之间的交互过程。图7是终端设备、源MN、SN、MN-A1、MN-A1之间的交互流程图。如图7所示，终端设备、源MN、SN、MN-A1、MN-A1之间的交互包括以下步骤：
S11：源MN与SN交互快速恢复(fast recovery)流程。
MN可通过split SRB1或者SRB3与SN交互fast recovery流程，该fast recovery流程是指终端设备与源MN之间发生无线链路失败后，终端设备可通过SN与源MN进行交互。
S12：源MN向终端设备配置fast recovery流程。
MN向终端设备配置fast recovery流程，即向终端设备发送fast recovery reconfiguration信息，以使得终端设备后续可进行fast recovery流程，即终端设备在与源MN之间发生无线链路失败后，可通过SN与源MN之间进行信息的交互。
S13：源MN分别与MN-A1、MN-A2交互切换流程(handover procedure)，即源MN分别向MN-A1、MN-A2发送切换请求，以请求终端设备可向MN-A1和MN-A1做条件切换，源MN收到MN-A1、MN-A2分别发送的确认信息后，表明终端设备后续可向MN-A1和MN-A1做条件切换。
S14：源MN向终端设备发送RRC重配置信息，以通过RRC重配置信息向终端设备配置第一条件切换配置信息。该第一条件切换配置信息包括MN-A2和MN-A3所属的小区标识，以及MN-A2和MN-A3所属的小区分别对应的CHO触发条件。
S15：终端设备检测到与源MN之间发生无线链路失败，即与MCG发生无线链路失败(MCG RLF)。终端设备与源MN之间发生无线链路失败可能是由于终端设备过晚进行CHO导致的。
S161：终端设备向SN发送MCG failure information(即第一失败信息)。相应的，SN向源MN转发MCG failure information。
该MCG failure information包括第一条件切换配置信息。可选的，MCG failure information不包括第一条件切换配置信息。
S162：源MN向SN发送RRC重配置消息(即第一响应消息)，该RRC重配置消息包括第一指示信息或第一小区的小区标识。相应的，SN将该RRC重配置消息转发给终端设备，终端设备接收来自SN的RRC重配置信息。
可选的，该RRC重配置消息不包括第一指示信息或第一小区的小区标识，包括legacy HO CMD或legacy RRC release。
其中，legacy HO CMD是源MN选择合适的小区发起切换请求，目标MN响应该切换请求后，源MN向终端设备发送的切换命令。从而终端设备基于切换命令，执行切换和数据转发。
legacy RRC release是源MN向终端设备发送的RRC连接释放信息。终端设备接收到该legacy RRC release后，进行小区重选，确认存在符合小区重选条件的新小区后，终端设备尝试驻留到该新小区。
终端设备接收到来自源MN的RRC重配置消息，则表明终端设备进行fast recovery流程成功。
S17：终端设备根据该RRC重配置信息向MN-A1接入失败，或者向MN-A1接入成功且在预设时长内发生无线链路失败。MN-A1是第一小区，或者是基于第一指示信息在第一条件切换配置信息配置的候选小区中选择的接入小区。也就是说，终端设备根据RRC重配置信息未成接入目标小区。
S18：终端设备进行RRC连接重建立，且与MN-A2进行RRC连接重建立成功。
可选的，终端设备记录根据RRC重配置信息向MN-A1接入失败，或者向MN-A1接入成功且在预设时长内发生无线链路失败的第二失败信息，并通过MN-A2向源MN上报失败报告，失败报告包括第二失败信息。
可选的，第二失败信息还包括第三指示信息，第三指示信息用于指示终端设备根据第一响应消息未成 功接入的小区是否为第一条件切换配置信息配置的候选小区中的小区，即指示终端设备接入失败的小区，或者接入成功且在预设时长内发生无线链路失败的小区，是否为第一条件切换配置信息配置的候选小区中的小区。
也就是说，终端设备还可通过失败报告向第一网络设备上报接入失败的小区是否为第一条件切换配置信息配置的候选小区中的小区，从而有利于第一网络设备确定第一条件切换配置信息配置的候选小区是否为合适的小区，或者确定第一条件切换配置信息配置的候选小区的CHO触发条件是否合适。
一种可选的实施方式中，第一失败信息记录的previous PCell ID为源MN所属的主小区的小区标识。可选的，第一失败信息记录的previous PCell ID为SN所属的辅小区的小区标识，且第一失败信息还记录previous Actual PCell Id，且将previous Actual PCell Id记录为源MN所属的主小区的小区标识。
一种可选的实施方式中，源MN将第一失败信息和失败报告关联，其关联方式可参见上述S104中所述，不再赘述。
本申请实施例中，终端设备在与第一网络设备之间的无线链路失败时，可以在进行与第一网络设备之间的无线链路恢复时，接收用于指示从第一条件切换配置信息配置的候选小区中选择接入的小区的第一指示信息，或者接收从第一条件切换配置信息配置的候选小区中选择的第一小区的小区标识，从而，终端设备可及时接入第一条件切换配置信息配置的候选小区中的小区，有利于快速恢复终端设备与主小区组之间的无线链路。
另外，终端设备在与第一网络设备之间的无线链路失败之后，向第一网络设备上报的第一失败信息包括第一条件切换配置信息，有利于第一网络设备后续基于第一失败信息优化终端设备的条件切换配置信息，可减少过晚条件切换发生的次数，从而可减少终端设备与第一网络设备之间的无线链路失败概率。
实施例二
本申请实施例还提出一种通信方法200，图8是该通信方法200的交互示意图。该通信方法200也是从终端设备、第一网络设备、第二网络设备的交互角度进行阐述。该通信方法200包括但不限于以下步骤：
S201.终端设备如果与第一网络设备之间的无线链路失败，以及与第一网络设备之间的快速链路恢复失败且第一定时器未超时，将第一失败信息和第三失败信息记录在第一无线链路失败报告中。
其中，第一失败信息是终端设备与第一网络设备之间发生无线链路失败的信息，第三失败信息是终端设备执行快速链路恢复失败的信息。第一定时器是终端设备在检测到与第一网络设备之间的无线链路失败时开启的。第一定时器的运行时长可以是第一网络设备为终端设备配置的，或者，也可以是终端设备自行预先设定的。
第一失败信息包括终端设备与第一网络设备发生无线链路失败的相关信息，即第一失败信息包括但不限于上述RLF report中的相关参数。可选的，第一失败信息还可包括第一条件切换配置信息。该第一条件切换配置信息是第一网络设备为终端设备配置的，且用于进行条件切换的相关信息。第一失败信息包括第一条件切换配置信息时，有利于第一网络设备后续优化终端设备的条件切换配置信息。
第三失败信息包括终端设备与第一网络设备之间的快速链路恢复失败的相关信息，即第三失败信息也包括但不限于上述RLF report中的相关参数。
可选的，第三失败信息还可包括以下一种或多种：指示终端设备是否执行快速链路恢复失败的指示信息、第三定时器的超时原因、辅小区组发生无线链路失败的原因、辅小区组去激活。第三定时器是T316定时器。
第三失败信息包括以上一种或多种时，有利于第一网络设备接收到该第三失败信息后，基于第三失败信息的内容，确定终端设备执行快速链路恢复失败的原因。
终端设备在检测到与第一网络设备之间的无线链路失败时，即与MCG之间的无线链路发生无线链路失败时，开启第一定时器，并进行与第一网络设备之间的快速链路恢复。终端设备进行与第一网络设备之间的快速链路恢复，是指终端设备通过第二网络设备向第一网络设备上报与第一网络设备之间的无线链路失败时的第一失败信息，第一网络设备接收到第一失败信息后，通过第二网络设备向终端设备转发第一响应信息，终端设备接收来自第二网络设备的第一响应信息。
第一响应信息可为以下信息中的一种：第一指示信息、第一小区的小区标识、legacy HO CMD、legacy RRC release。第一指示信息用于指示终端设备从第一条件切换配置信息配置的候选小区中选择接入的小区和/或条件切换配置标识。第一小区是终端设备的待切换小区且是第一条件切换配置信息配置的候选小区中 的小区和/或是条件切换配置标识对应的第一条件切换配置信息配置的候选小区中的小区，该待切换小区也是目标切换小区。
第一指示信息、第一小区的小区标识、legacy HO CMD、legacy RRC release均可参见上述通信方法100，不再赘述。
终端设备与第一网络设备之间的快速链路恢复，是指上述fast MCG link recovery流程，其具体过程不再赘述。终端设备与第一网络设备之间的快速链路恢复失败，可能是终端设备未成功向第一网络设备发送第一失败信息，或者是终端设备未接收到来自第一网络设备的第一响应信息。其中，终端设备未成功向第一网络设备发送第一失败信息，可能是终端设备未成功向第二网络设备发送第一失败信息，因此第二网络设备无法向第一网络设备转发第一失败信息，或者可能是终端设备向第二网络设备成功发送了第一失败信息，但第二网络设备未成功向第一网络设备转发第一失败信息。终端设备未接收到来自第一网络设备的第一响应信息，可能是第一网络设备未成功向第二网络设备发送第一响应信息，从而第二设备无法向终端设备转发第一响应信息，也可能是第一网络设备向第二网络设备成功发送了第一响应信息，但第二网络设备未成功向终端设备转发第一响应信息，因此终端设备未接收到第一响应信息。
如果在第一定时器计时期间，终端设备与第一网络设备之间的快速链路恢复失败，表明与第一网络设备之间的快速链路恢复失败，和终端设备与第一网络设备之间的无线链路失败存在较大关联的可能性，因此将第一失败信息和第二失败信息记录在同一个无线链路失败报告(即第一无线链路失败报告)中，以有利于第一网络设备可基于第一无线链路失败报告联合分析终端设备与第一网络设备发生无线链路失败，以及与第一网络设备之间的快速链路恢复失败的原因。
该方式与终端设备在与第一网络设备之间的快速链路恢复失败时，将终端设备与第一网络设备之间的无线链路失败的第一失败信息丢弃相比，有利于保障失败信息记录的完整性，进而有利于提高第一网络设备进行相关原因分析的可靠性。
终端设备将第一失败信息和第三失败信息记录在同一个无线链路失败报告中时，为区分第一失败信息和第三失败信息，可以是用不同的标识在第一无线链路失败报告中记录第一失败信息和第三失败信息。
示例性的，第一无线链路失败报告中记录的第一失败信息包括：first failed PCell Id、first connection Failure Type、first previous PCell Id、first rlf-Cause等等，第一无线链路失败报告中记录的第三失败信息包括：second failed PCell Id、second connection Failure Type、second previous PCell Id、second rlf-Cause等等。可见，第一无线链路失败报告中通过first和second的标识可区分第一失败信息和第三失败信息。
S202.终端设备如果与第一网络设备之间的无线链路失败，以及与第一网络设备之间的快速链路恢复失败且第一定时器超时，将第一失败信息记录在第二无线链路失败报告中，以及将第三失败信息记录在第三无线链路失败报告中。
终端设备与第一网络设备之间的无线链路失败后，开启第一定时器，且进行与第一网络设备之间的快速链路恢复。如果第一定时器超时，终端设备与第一网络设备之间的快速链路恢复失败，表明终端设备是在与第一网络设备之间发生无线链路失败之后的较长时间后，才与第一网络设备之间的快速链路恢复失败，可能终端设备与第一网络设备之间的快速链路恢复失败的原因和终端设备与第一网络设备之间的无线链路失败的原因关联性较小，因此终端设备分开记录第一失败信息和第三失败信息，即将第一失败信息记录在第二无线链路失败报告中，将第三失败信息记录在第三无线链路失败报告中。
该方式中，终端设备在与第一网络设备之间的快速链路恢复失败时，将第三失败信息记录在第三无线链路失败报告的同时，也将第一失败信息记录在第二无线链路失败报告中，未将第一失败信息丢弃，从而也可保障失败信息的完整性，进而有利于提高第一网络设备进行相关原因分析的可靠性。
S201或S202之后，终端设备进行小区选择，当终端设备选择的小区是第一条件切换配置信息配置的候选小区中的小区时，终端设备进行基于条件切换的恢复(CHO based recovery)，即向选择的小区接入。如果终端设备向选择的小区接入成功，则该接入的小区所属的网络设备为第四网络设备。也就是说，第四网络设备是终端设备检测到与第一网络设备之间的无线链路失败，且与第一网络设备之间的快速链路恢复失败后接入成功的网络设备。
如果终端设备将第一失败信息和第三失败信息记录在第一无线链路失败报告中，终端设备还可向第四网络设备发送第一无线链路失败报告。相应的，第四网络设备将第一无线链路失败报告转发给第一网络设备，第一网络设备获得第一无线链路失败报告。从而第一网络设备可根据第一无线链路失败报告联合分析终端设备与第一网络设备发生无线链路失败，以及与第一网络设备之间的快速链路恢复失败的原因。
如果终端设备将第一失败信息记录在第二无线链路失败报告中，将第三失败信息记录在第三无线链路失败报告中，那么终端设备还可向第四网络设备发送第二无线链路失败报告或第三无线链路失败报告。可理解的，终端设备发送的无线链路失败报告是终端设备保存的最新的无线链路失败报告，即若终端设备保存的最新的无线链路失败报告为第二无线链路失败报告，则向第四网络设备发送第二无线链路失败报告，若终端设备保存的最新的无线链路失败报告为第三无线链路失败报告，则向第四网络设备发送第三无线链路失败报告。
相应的，第四网络设备将第二无线链路失败报告或第三无线链路失败报告转发给第一网络设备。从而第一网络设备可根据第二无线链路失败报告或第三无线链路失败报告分析终端设备与第一网络设备发生无线链路失败的原因、与第一网络设备进行快速链路恢复失败的原因。
另一种可选的实施方式中，终端设备在利用第三小区进行基于条件切换的恢复失败时，根据第二定时器确定第一失败信息、第三失败信息和第四失败信息的记录方式。
其中，第三小区是终端设备检测到与第一网络设备之间的无线链路失败，以及与第一网络设备之间的快速链路恢复失败后通过小区选择获得的且是第一条件切换配置信息配置的候选小区中的小区。第四失败信息是终端设备利用第三小区进行基于条件切换的恢复失败的信息，第四失败信息包括但不限于上述RLF report中包括的相关参数。第二定时器是终端设备在检测到与第一网络设备之间的快速链路恢复失败时开启的。第二定时器的运行时长可以是第一网络设备为终端设备配置的，或者，也可以是终端设备预先设定的。
也就是说，终端设备在与第一网络设备之间的快速链路恢复失败时，开启第二定时器，并进行小区选择。如果终端设备选择的第三小区是第一条件切换配置的小区，进行基于条件切换的恢复。终端设备在第二定时器计时期间，在利用第三小区进行基于条件切换的恢复失败时，根据第二定时器是否超时，确定第一失败信息、第三失败信息、第四失败信息的记录方式。
以下根据第一失败信息和第二失败实现的记录方式，阐述终端设备根据第二定时器确定第一失败信息、第三失败信息、第四失败信息的记录方式：
情况1：第一失败信息和第三失败信息记录在第一无线链路失败报告中时，第一失败信息、第三失败信息、第四失败信息的记录方式。
第一失败信息和第三失败信息记录在第一无线链路失败报告中时，终端设备根据第二定时器确定第一失败信息、第三失败信息和第四失败信息的记录方式，包括：如果第二定时器未超时，将第四失败信息记录在第一无线链路失败报告中；如果第二定时超时，将第四失败信息记录在第四无线链路失败报告中。
如果第二定时器未超时，表明终端设备利用第三小区进行基于条件切换的恢复失败的原因可能与第一失败信息和第三失败信息存在关联，因此终端设备将第一失败信息、第三失败信息、第四失败信息均记录在第一无线链路失败报告中。如果第二定时器超时，终端设备利用第三小区进行基于条件切换的恢复失败，表明终端设备利用第三小区进行基于条件切换的恢复失败的原因可能与第一失败信息和第三失败信息之间的关联性较弱，因此终端设备将第四失败信息单独记录在第四无线链路失败报告中。
终端设备将第一失败信息、第三失败信息和第四失败信息均记录在第一无线链路失败报告中时，可采用不同的标识对第一失败信息、第三失败信息和第四失败信息进行区分。例如，第一无线链路失败报告中记录的第一失败信息包括：first failed PCell Id、first connection Failure Type、first previous PCell Id、first rlf-Cause等等，第一无线链路失败报告中记录的第三失败信息包括：second failed PCell Id、second connection Failure Type、second previous PCell Id、second rlf-Cause，第一无线链路失败报告中记录的第四失败信息包括：third failed PCell Id、third connection Failure Type、third previous PCell Id、second rlf-Cause等等。
如果终端设备将第一失败信息、第三失败信息、第四失败信息均记录在第一无线链路失败报告中，终端设备还可向第三网络设备发送第一无线链路失败报告。相应的，第三网络设备向第一网络设备发送第一无线链路失败报告。第一网络设备接收来自第三网络设备的第一无线链路失败报告，并根据第一无线链路失败报告确定终端设备的第二条件切换配置信息。第三网络设备是终端设备进行基于条件切换的恢复失败后重新接入成功的网络设备。
终端设备根据第一无线链路失败报告确定终端设备的第二条件切换配置信息，是指根据第一无线链路失败报告优化终端设备的条件切换配置信息，以减少终端设备与第一网络设备发生无线链路失败的概率，减少终端设备接入小区的概率，以及减少终端设备进行基于条件切换恢复失败的概率。
如果终端设备将第一失败信息和第二失败信息记录在第一无线链路失败报告中，将第四失败信息记录在第四无线链路失败报告中，终端设备还可向第三网络设备发送第一无线链路失败报告或第四无线链路失 败报告。终端设备发送的无线链路失败报告是该终端设备保存的最新的无线链路失败报告。相应的，第三网络设备向第一网络设备发送第一无线链路失败报告或第四无线链路失败报告。第一网络设备接收来自第三网络设备的第一无线链路失败报告或第四无线链路失败报告，并基于第一无线链路失败报告或第四无线链路失败报告确定终端设备的第二条件切换配置信息，即基于第一无线链路失败报告或第四无线链路失败报告优化终端设备的条件切换配置信息。
情况2：第一失败信息记录在第二无线链路失败报告中，第二失败信息记录在第三无线链路失败报告中时，第一失败信息、第三失败信息、第四失败信息的记录方式。
终端设备根据第二定时器确定第一失败信息、第三失败信息和第四失败信息的记录方式，包括：如果第二定时器未超时，将第四失败信息记录在第二无线链路失败报告或第三无线链路失败报告中；如果第二定时器超时，将第四失败信息记录在第四无线链路失败报告中。
如果终端设备将第一失败信息和第四失败信息记录在第二无线链路失败报告中，将第三失败信息记录在第三无线链路失败报告中，或者将第一失败信息记录在第二无线链路失败信息中，将第三失败信息和第四失败信息记录在第三无线链路中，终端设备还可向第三网络设备发送第二无线链路失败报告或第三无线链路失败报告。相应的，第三网络设备向第一网络设备发送第二无线链路失败报告或第三无线链路失败报告。第一网络设备接收来自第三网络设备的第二无线链路失败报告或第三无线链路失败报告，并根据接收的无线链路失败报告确定终端设备的第二条件切换配置信息，即优化终端设备的条件切换配置信息。
如果终端设备将第一失败信息记录在第二无线链路失败报告中，将第三失败信息记录在第三无线链路失败报告中，将第四失败信息记录在第四无线链路失败报告中，终端设备还可向第三网络设备发送第二无线链路失败报告，或者，发送第三无线链路失败报告，或者，发送第四无线链路失败报告。此处终端设备发送的无线链路失败报告也是该终端设备保存的最新的无线链路失败报告。相应的，第三网络设备向第一网络设备发送第二无线链路失败报告，或者，发送第三无线链路失败报告，或者发送第四无线链路失败报告。第一网络设备接收来自第三网络设备的第二无线链路失败报告，或者，接收第三无线链路失败报告，或者，接收第四无线链路失败报告，并根据接收的无线链路失败报告确定终端设备的第二条件切换配置信息。
本申请实施例中，不论终端设备对第一失败信息、第三失败信息和第四失败信息如何记录，均可采用first、second、third分别对第一失败信息、第三失败信息和第四失败信息中的信息进行标识。
终端设备将多个失败信息记录在同一个无线链路失败报告中，即可将多个失败信息关联在同一个无线链路失败报告中，以使得第一网络设备基于同一个无线链路失败报告中的多个失败信息，联合分析终端设备出现无线链路失败的原因，比如分析终端设备连续几次发生无线链路失败的原因是否均是由于终端设备的第一条件切换配置信息的不合理造成的。另外，目前终端设备在当前无线链路失败后，记录当前的失败信息时，清空之前记录的失败信息或无线链路失败报告的方式，会使得第一网络设备无法获得终端设备发生多次无线链路失败时每一次记录的失败信息或无线链路失败报告。因此，本申请实施例中，终端设备将无线链路失败时的多个失败信息记录在同一个无线链路失败报告中，可保证终端设备发生多次无线链路失败时每次的失败信息，即可保证无线链路失败时失败信息的完整性，进而可提高第一网络设备分析终端设备发生无线链路失败原因的可靠性。
S201或S202之后，终端设备进行小区选择，当终端设备选择的小区不是第一条件切换配置信息配置的候选小区中的小区时，或者，终端设备利用第三小区进行基于条件切换的恢复失败时，终端设备进行RRC连接重建立。
以下以第一网络设备是终端设备的源MN，第二网络设备是终端设备的SN，第三网络设备是和第四网络设备均是第一条件切换配置信息配置的候选小区所属的网络设备，分别是MN-A1、MN-A2，详细介绍通信方法200中终端设备、源MN、SN、MN-A1、MN-A1之间的交互过程。图9是终端设备、源MN、SN、MN-A1、MN-A1之间的交互流程图。如图9所示，终端设备、源MN、SN、MN-A1、MN-A1之间的交互包括以下步骤：
S21：源MN与SN交互快速恢复(fast recovery)流程。
S22：源MN向终端设备配置fast recovery流程。
S23：源MN分别与MN-A1、MN-A2交互切换流程(handover procedure)，即源MN分别向MN-A1、MN-A2发送切换请求，以请求终端设备可向MN-A1和MN-A1做条件切换，源MN收到MN-A1、MN-A2分别发送的确认信息后，表明终端设备后续可向MN-A1和MN-A1做条件切换。
S24：源MN向终端设备发送RRC重配置信息，以通过RRC重配置信息向终端设备配置第一条件切换配置信息。
S25：终端设备检测到与源MN之间发生无线链路失败，即与MCG发生无线链路失败(MCG RLF)。
S21至S25可参见上述S11至S15的实施方式，不再赘述。
S26：终端设备与源MN之间快速链路恢复失败。
终端设备与源MN之间快速链路恢复失败，可指：终端设备在T316超期前未收到第一响应消息。终端设备执行快速链路恢复(fast recovery)失败最表面的原因是T316超期。进一步的，T316超期的原因可以细化为以下一种或多种：SCG去激活，SCG无线链路失败，空口和站间交互时延太大。
站间交互时延包括上述通信方法100中的第一时延、第二时延和第三时延。站间交互时延可以由源MN(即第一网络设备)统计，也可以由SN(即第二网络设备)统计。
可选的，SN还可统计从发送第一失败消息到接收第一响应消息的时间段，或者是SN与MN之间交互流程中如SN发送辅站添加/修改/释放/变更请求消息到从MN收到辅站添加/修改/释放/变更请求确认消息之间的时间差。
可选的，源MN还可统计从发送给SN的控制面消息到从SN接收到确认消息的时间段。例如，源MN统计源MN向SN发送添加/修改请求消息到从SN收到添加/修改确认消息的时间段。
如上述所述，SN可统计与终端设备交互的空口时延(即第三时延)，该空口时延可分为上行时延和下行时延。可选的，上行时延和下行时延可以直接采纳用户面数据包的上行时延和下行时延，即按照每个终端设备的每个数据无线承载的粒度来进行时延统计。可选的，也可以参考用户面数据包的统计方式，按照每个终端设备的每个信令无线承载的粒度进行控制面信令上行时延和下行时延的统计。
对于用户面数据包的下行时延而言，下行时延包括PDCP层时延(比如CU-UP的时延)、F1-U时延、混合自动重传请求(Hybrid Automatic Repeat Request，HARQ)传输或重传时延、RLC侧时延(比如处理时延)中的一种或多种。其中CU-UP的时延可以为：CU-UP通过NG-U收到数据包到把该数据包发送给CU-DU的时间段。对于用户面数据包的上行时延而言，上行时延包括上行终端侧时延D1和上行接入网侧时延D2两个过程，上行终端侧时延为终端设备侧的包数据汇聚协议(packet data convergence protocol，PDCP)缓冲时延。该PDCP缓冲时延对应的时间段为终端设备从PDCP的上层收到数据包到得到了发送该数据包的上行授权，该时延也包括从终端设备发送调度请求或随机接入到得到上行授权的时延，即上行终端侧时延D1为终端设备接收到数据至向接入网设备发送数据的时长，终端侧时延由终端设备进行测量并上报给接入网设备。上行接入网侧时延D2包括HARQ传输或重传时延D2.1，RLC侧时延D2.2，F1口时延D2.3，以及PDCP重排序时延D2.4等。其中，D2.1可以定义为从终端设备发送数据包到接入网设备成功接收该数据包的时段，D2.2可以定义为从RLC服务数据单元(service data unit，SDU)的第一部分被正确接收到把该RLC SDU发送给PDCP层或CU的时段；D2.3可以定义为CU把一个数据包发送给分布单元(distributed unit，DU)到CU从DU收到该包的传输状态，再减去该包在DU侧的反馈时延，再除以2；D2.4可以定义为收到一个PDCP SDU到把该PDCP SDU发送给上层的时段。
源MN可通过上述统计的站间交互时延(比如，第一时延、第二时延和第三时延)测量信息确定终端设备执行fast recovery失败的原因。如果源MN确定终端设备执行fast recovery失败的原因是空口和站间交互时延过大，源MN可以获取到站间交互时延和空口交互时延测量信息，并根据时延测量信息合理配置T316门限，减少终端设备执行fast recovery失败的概率。
终端设备与源MN之间快速链路恢复失败的原因，可能是S261中终端设备未成功向源MN发送MCG failure information，或者也可能是S262中源MN未成功向终端设备发送第一响应信息。
终端设备在检测到与源MN之间发生无线链路失败时，开启第一定时器，在第一定时器计时期间，与源MN之间快速链路恢复失败，则将与源MN之间发生无线链路失败的第一失败信息和与源MN之间快速链路恢复失败的第三失败信息，记录在第一无线链路失败报告中。
如果第一定时器超时，终端设备则将第一失败信息和第三失败信息分别记录在第二无线链路失败报告、第三无线链路失败报告中。
第三失败信息包括以下一种或多种：指示终端设备是否执行快速链路恢复失败的指示信息、第三定时器的超时原因、辅小区组发生无线链路失败的原因、辅小区组去激活。
可理解的，第三失败信息包括以下一种或多种：指示终端设备是否执行过fast recovery，T316expiry cause(fast recovery failure cause)，SCG rlf，SCG deactivated。其中，如果fast recovery failure cause是SCG RLF，则第三失败信息记录了SCG RLF失败信息。
S271：终端设备利用第三小区进行基于条件切换的恢复。
终端设备与源MN之间快速链路恢复失败后，进行小区选择，选择的小区是第一条件切换配置信息配置的候选小区时，进行基于条件切换的恢复。从而第三小区是终端设备与源MN之间快速链路恢复失败后选择的小区，且是第一条件切换配置信息配置的候选小区中的小区。
终端设备在与源MN之间快速链路恢复失败时，开启第二定时器，在第二定时器计时期间，利用第三小区进行基于条件切换的恢复，则将进行基于条件切换的恢复失败的第四失败信息，和上述第一失败信息和/或第三失败信息记录在同一个无线链路失败报告中。如果第二定时器超时后，终端设备利用第三小区进行基于条件切换的恢复失败，则将进行基于条件切换的恢复失败的第四失败信息，与上述第一失败信息和第三失败信息分开记录，即记录在不同的无线链路失败报告中。
S272：终端设备进行RRC连接重建立。
终端设备与源MN之间快速链路恢复失败后，如果选择的小区不是第一条件切换配置信息配置的候选小区，终端设备进行RRC连接重建立。或者，终端设备与源MN之间快速链路恢复失败后，如果选择的小区是第一条件切换配置信息配置的候选小区，则进行基于条件切换的恢复，但进行基于条件切换的恢复失败，终端设备也进行RRC连接重建立。
本申请实施例中，终端设备如果与第一网络设备之间的无线链路失败，以及与第一网络设备之间的快速链路恢复失败且第一定时器未超时，终端设备将第一失败信息和第三失败信息记录在同一个无线链路失败报告(即第一无线链路失败报告)中，有利于第一网络设备根据第一无线链路失败报告联合分析终端设备与第一网络设备之间无线链路失败，以及与第一网络设备之间的快速链路恢复失败的原因，进而有利于减少终端设备与第一网络设备之间发生无线链路失败的概率，以及减少与第一网络设备之间的快速链路恢复失败的概率。
终端设备如果与第一网络设备之间的无线链路失败，以及与第一网络设备之间的快速链路恢复失败且第一定时器超时，表明终端设备与第一网络设备之间的无线链路失败和与第一网络设备之间的快速链路恢复失败的关联性较弱，可将第一失败信息和第三失败信息分别记录在不同的无线链路失败报告中，以有利于第一网络设备根据第一失败信息或第三失败信息，分析终端设备与第一网络设备之间发生无线链路失败的原因，以及终端设备与第一网络设备之间的快速链路恢复失败的原因。
另外，与终端设备在与第一网络设备之间的快速链路恢复失败时，第一失败信息和第三失败信息如果分别记录在不同的无线链路失败报告里，最终只留下最新的无线链路失败报告，即记录第三失败信息的无线链路报告会覆盖掉包含第一失败信息的无线链路失败报告，终端设备将第一失败信息和第三失败信息记录在同一个无线链路失败报告中，可保证失败信息的记录完整性，从而有利于第一网络设备获得完整的无线链路失败信息。
针对前文描述的技术方案，下文进一步描述相应的装置实现方案。
为了实现上述本申请实施例提供的方法中的各功能，终端设备、第一网络设备和第二网络设备可以包括硬件结构和/或软件模块，以硬件结构、软件模块、或硬件结构加软件模块的形式来实现上述各功能。上述各功能中的某个功能以硬件结构、软件模块、还是硬件结构加软件模块的方式来执行，取决于技术方案的特定应用和设计约束条件。
如图10所示，本申请实施例提供了一种通信装置1000。该通信装置1000可以是终端设备的部件(例如，集成电路，芯片等等)，也可以是第一网络设备的部件(例如，集成电路，芯片等等)，也可以是第二网络设备的部件(例如，集成电路，芯片等等)。该通信装置1000也可以是其他通信单元，用于实现本申请方法实施例中的方法。该通信装置1000可以包括：通信单元1001和处理单元1002。可选的，还可以包括存储单元1003。
在一种可能的设计中，如图10中的一个或者多个单元可能由一个或者多个处理器来实现，或者由一个或者多个处理器和存储器来实现；或者由一个或多个处理器和收发器实现；或者由一个或者多个处理器、存储器和收发器实现，本申请实施例对此不作限定。所述处理器、存储器、收发器可以单独设置，也可以集成。
所述通信装置1000具备实现本申请实施例描述的发送端或接收端的功能。比如，所述通信装置1000包括发送端执行本申请实施例描述的发送端涉及步骤所对应的模块或单元或手段(means)，所述功能或单元或手段(means)可以通过软件实现，或者通过硬件实现，也可以通过硬件执行相应的软件实现，还可以通过软件和硬件结合的方式实现。详细可进一步参考前述对应方法实施例中的相应描述。
在一种可能的设计中，一种通信装置1000可包括：处理单元1002和通信单元1001；
通信单元1001，用于在与第一网络设备之间的无线链路失败时，向第二网络设备发送第一失败信息，所述第一失败信息包括第一条件切换配置信息，所述第一网络设备是所述装置接入的主小区组所属的网络设备，所述第二网络设备是所述终端设备接入的辅小区组所属的网络设备；所述通信单元1001，还用于接收来自所述第二网络设备的第一响应消息，所述第一响应消息包括第一指示信息或第一小区的小区标识；
其中，所述第一指示信息用于指示所述装置从所述第一条件切换配置信息配置的候选小区中选择接入的小区，所述第一小区是所述装置的待切换小区且是所述第一条件切换配置信息配置的候选小区中的小区。
一种可选的实现方式中，处理单元1002用于：如果接入所述第一小区或第二小区失败，或者，接入所述第一小区或第二小区成功且在预设时长内发生无线链路失败，进行无线资源控制连接重建立；所述第二小区是所述装置根据所述第一指示信息选择接入的小区。
一种可选的实现方式中，处理单元1002还用于：记录第二失败信息，并向第三网络设备发送失败报告；所述失败报告包括所述第二失败信息，所述第三网络设备是所述装置重新接入成功的网络设备，所述第二失败信息包括所述第一响应消息的消息指示类型，还包括所述装置根据所述第一响应消息接入所述第一小区或所述第二小区失败，或者，接入所述第一小区或所述第二小区成功且在所述预设时长内发生无线链路失败；所述第一响应消息的消息指示类型指示所述第一响应消息包括所述第一指示信息或所述第一小区的小区标识。
一种可选的实现方式中，所述第二失败信息还包括第二指示信息，所述第二指示信息用于指示所述装置接收所述第一响应消息的小区为所述主小区组中的主小区。
本申请实施例和上述所示方法实施例基于同一构思，其带来的技术效果也相同，具体原理请参照上述所示实施例的描述，不再赘述。
在另一种可能的设计中，一种通信装置1000可包括：处理单元1002和通信单元1001；
通信单元1001，用于接收来自第二网络设备的第一失败信息，所述第一失败信息包括终端设备与所述装置之间无线链路失败的信息和第一条件切换配置信息，所述装置是所述终端设备接入的主小区组所属的装置，所述第二网络设备是所述终端设备接入的辅小区组所属的网络设备；通信单元1001，还用于向所述第二网络设备发送第一响应信息，所述第一响应消息包括第一指示信息或第一小区的小区标识；
其中，所述第一指示信息用于指示所述终端设备从所述第一条件切换配置信息配置的候选小区中选择接入的小区，所述第一小区是所述终端设备的待切换小区且是所述第一条件切换配置信息配置的候选小区中的小区。
一种可选的实现方式中，通信单元1001，还用于接收来自第三网络设备的失败报告，所述失败报告包括第二失败信息；处理单元1002用于将所述第一失败信息和所述失败报告关联；
其中，所述第三网络设备是所述终端设备重新接入成功的网络设备；所述第二失败信息包括所述第一响应消息的消息指示类型，还包括所述终端设备根据所述第一响应消息接入所述第一小区或第二小区失败，或者，接入所述第一小区或第二小区成功且在预设时长内发生无线链路失败，所述第二小区是所述终端设备根据所述第一指示信息选择接入的小区，所述第一响应消息的消息指示类型指示所述第一响应消息包括所述第一指示信息或所述第一小区的小区标识。
一种可选的实现方式中，所述第二失败信息包括所述终端设备根据所述第一响应消息接入所述第一小区或所述第二小区失败时，所述失败报告携带的小区无线网络临时标识和所述第一失败信息携带的小区无线网络临时标识相同，且所述失败报告是与所述第一失败信息的记录时间最接近的失败报告。
另一种可选的实现方式中，所述第二失败信息包括所述终端设备根据所述第一响应消息接入所述第一小区或所述第二小区成功且在所述预设时长内发生无线链路失败时，所述失败报告携带的候选小区标识所对应的小区是所述第一失败信息中所述第一条件切换配置信息配置的候选小区中的小区，且所述失败报告是与所述第一失败信息的记录时间最接近的失败报告。
一种可选的实现方式中，所述第二失败信息还包括第二指示信息，所述第二指示信息用于指示所述终端设备接收所述第一响应消息的小区为所述主小区组中的主小区。
一种可选的实现方式中，处理单元1002还用于统计第一时延，所述第一时延为所述第一网络设备与所述第二网络设备的站间交互平均时延。
本申请实施例和上述所示方法实施例基于同一构思，其带来的技术效果也相同，具体原理请参照上述所示实施例的描述，不再赘述。
在又一种可能的设计中，一种通信装置1000可包括：处理单元1002和通信单元1001；
通信单元1001，用于接收来自终端设备的第一失败信息，所述第一失败信息包括所述终端设备与第一 网络设备之间无线链路失败的信息和第一条件切换配置信息，所述第一网络设备是所述终端设备接入的主小区组所属的网络设备，所述装置是所述终端设备接入的辅小区组所属的装置；
通信单元1001，还用于向所述第一网络设备发送所述第一失败信息；通信单元1001，还用于接收来自所述第一网络设备的第一响应信息；通信单元1001，还用于向所述终端设备发送所述第一响应信息；
其中，所述第一响应消息包括第一指示信息或第一小区的小区标识，所述第一指示信息用于指示所述终端设备从所述第一条件切换配置信息配置的候选小区中选择接入的小区，所述第一小区是所述终端设备的待切换小区且是所述第一条件切换配置信息配置的候选小区中的小区。
一种可选的实现方式中，处理单元1002还用于：统计第二时延；所述第二时延为所述第二网络设备与所述第一网络设备交互所述第一失败信息和所述第一响应信息的站间交互平均时延，或者为所述第二网络设备与所述第一网络设备的站间交互平均时延；统计第三时延；所述第三时延为所述第二网络设备与所述终端设备交互所述第一失败信息和所述第一响应信息的空口交互平均时延，或者为所述第二网络设备与所述终端设备的空口交互平均时延，所述空口交互平均时延分为上行时延和下行时延。
本申请实施例和上述所示方法实施例基于同一构思，其带来的技术效果也相同，具体原理请参照上述所示实施例的描述，不再赘述。
在又一种可能的设计中，一种通信装置1000可包括：处理单元1002和通信单元1001；
处理单元1002，用于如果与第一网络设备之间的无线链路失败，以及与所述第一网络设备之间的快速链路恢复失败且第一定时器未超时，将第一失败信息和第三失败信息记录在第一无线链路失败报告中；处理单元1002，用于如果与所述第一网络设备之间的无线链路失败，以及与所述第一网络设备之间的快速链路恢复失败且所述第一定时器超时，将所述第一失败信息记录在第二无线链路失败报告中，以及将所述第三失败信息记录在第三无线链路失败报告中；
其中，所述第一失败信息是所述装置与所述第一网络设备之间发生无线链路失败的信息，所述第三失败信息是所述装置执行快速链路恢复失败的信息；所述第一网络设备是所述装置接入的主小区组所属的网络设备；所述第一定时器是所述装置在检测到与所述第一网络设备之间的无线链路失败时开启的。
一种可选的实现方式中，所述第三失败信息包括以下一种或多种：指示所述终端设备是否执行快速链路恢复失败的指示信息、第三定时器的超时原因、辅小区组发生无线链路失败的原因、辅小区组去激活；
一种可选的实现方式中，通信单元1001，还用于：向第四网络设备发送所述第一无线链路失败报告，或者，发送所述第二无线链路失败报告，或者，发送所述第三无线链路失败报告；
所述第四网络设备是所述装置检测到与所述第一网络设备之间的无线链路失败，且与所述第一网络设备之间的快速链路恢复失败后接入成功的网络设备。
一种可选的实现方式中，处理单元1002，还用于：在利用第三小区进行基于条件切换的恢复失败时，根据第二定时器确定所述第一失败信息、所述第三失败信息和第四失败信息的记录方式；所述第四失败信息是所述终端设备利用所述第三小区进行所述基于条件切换的恢复失败的信息；所述第三小区是所述装置检测到与所述第一网络设备之间的无线链路失败，以及与所述第一网络设备之间的快速链路恢复失败后通过小区选择获得的且是第一条件切换配置信息配置的候选小区中的小区；所述第二定时器是所述装置在检测到与所述第一网络设备之间的快速链路恢复失败时开启的。
一种可选的实现方式中，所述第一失败信息和所述第三失败信息记录在所述第一无线链路失败报告中；处理单元1002根据第二定时器确定所述第一失败信息、所述第三失败信息和第四失败信息的记录方式，具体用于：如果第二定时器未超时，将第四失败信息记录在所述第一无线链路失败报告中；如果第二定时超时，将第四失败信息记录在第四无线链路失败报告中。
另一种可选的实现方式中，所述第一失败信息记录在所述第二无线链路失败报告中，所述第二失败信息记录在所述第三无线链路失败报告中；处理单元1002根据第二定时器确定所述第一失败信息、所述第三失败信息和第四失败信息的记录方式，具体用于：如果第二定时器未超时，将第四失败信息记录在所述第二无线链路失败报告或所述第三无线链路失败报告中；如果第二定时器超时，将第四失败信息记录在第四无线链路失败报告中。
一种可选的实现方式中，通信单元1001还用于：向第三网络设备发送所述第一无线链路失败报告，或者，发送所述第四无线链路失败报告；所述第三网络设备是所述装置重新接入成功的网络设备。
另一种可选的实现方式中，通信单元1001还用于：向第三网络设备发送所述第二无线链路失败报告，或者，发送所述第三无线链路失败报告，或者，发送所述第四无线链路失败报告；所述第三网络设备是所述装置进行所述基于条件切换的恢复失败后重新接入成功的网络设备。
本申请实施例和上述所示方法实施例基于同一构思，其带来的技术效果也相同，具体原理请参照上述所示实施例的描述，不再赘述。
在又一种可能的设计中，一种通信装置1000可包括：处理单元1002和通信单元1001；
通信单元1001，用于接收第一无线链路失败报告；处理单元1002，用于根据所述第一无线链路失败报告，确定终端设备的第二条件切换配置信息；
其中，所述第一无线链路失败报告包括第一失败信息和第三失败信息，或者，包括第一失败信息、第三失败信息和第四失败信息；所述第一失败信息是所述终端设备与所述装置之间发生无线链路失败的信息，所述第三失败信息是所述终端设备执行快速链路恢复失败的信息，所述第四失败信息是所述终端设备进行基于条件切换的恢复失败的信息；所述装置是所述终端设备接入的主小区组所属的装置。
本申请实施例和上述所示方法实施例基于同一构思，其带来的技术效果也相同，具体原理请参照上述所示实施例的描述，不再赘述。
在又一种可能的设计中，一种通信装置1000可包括：处理单元1002和通信单元1001；
通信单元1001，用于接收第二无线链路失败报告或第三无线链路失败报告；处理单元1002，用于根据所述第二无线链路失败报告或所述第三无线链路失败报告，确定终端设备的第二条件切换配置信息；其中，所述第二无线链路失败报告包括第一失败信息，所述第三无线链路失败报告包括第三失败信息；或者，所述第二无线链路失败报告包括第一失败信息和第四失败信息，所述第三无线链路失败报告包括第三失败信息；或者，所述第二无线链路失败报告包括第一失败信息，所述第三无线链路失败报告包括第三失败信息和第四失败信息；
所述第一失败信息是所述终端设备与所述装置之间发生无线链路失败的信息，所述第三失败信息是所述终端设备执行快速链路恢复失败的信息，所述第四失败信息是所述终端设备进行基于条件切换的恢复失败的信息；所述装置是所述终端设备接入的主小区组所属的网络设备。
本申请实施例和上述所示方法实施例基于同一构思，其带来的技术效果也相同，具体原理请参照上述所示实施例的描述，不再赘述。
在又一种可能的设计中，一种通信装置1000可包括：处理单元1002和通信单元1001；
通信单元1001，用于接收第一无线链路失败报告或第四无线链路失败报告；处理单元1002，用于根据所述第一无线链路失败报告或所述第四无线链路失败报告，确定终端设备的第二条件切换配置信息；其中，第一无线链路失败报告包括第一失败信息和第三失败信息，所述第四无线链路失败报告包括第四失败信息；所述第一失败信息是所述终端设备与所述装置之间发生无线链路失败的信息，所述第三失败信息是所述终端设备执行快速链路恢复失败的信息，所述第四失败信息是所述终端设备进行基于条件切换的恢复失败的信息；所述装置是所述终端设备接入的主小区组所属的装置。
本申请实施例和上述所示方法实施例基于同一构思，其带来的技术效果也相同，具体原理请参照上述所示实施例的描述，不再赘述。
在又一种可能的设计中，一种通信装置1000可包括：处理单元1002和通信单元1001；
通信单元1001，用于接收第二无线链路失败报告，或者，接收第三无线链路失败报告，或者，接收第四无线链路失败报告；处理单元1002，用于根据所述第二无线链路失败报告，或所述第三无线链路失败报告，或所述第四无线链路失败报告，确定终端设备的第二条件切换配置信息；其中，第二无线链路失败报告包括第一失败信息，所述第三无线链路失败报告包括第二失败信息，所述第四无线链路失败报告包括第四失败信息；所述第一失败信息是所述终端设备与所述装置之间发生无线链路失败的信息，所述第三失败信息是所述终端设备执行快速链路恢复失败的信息，所述第四失败信息是所述终端设备进行基于条件切换的恢复失败的信息；所述装置是所述终端设备接入的主小区组所属的装置。
本申请实施例和上述所示方法实施例基于同一构思，其带来的技术效果也相同，具体原理请参照上述所示实施例的描述，不再赘述。
本申请实施例还提供一种通信装置1100，图11为通信装置1100的结构示意图。所述通信装置1100可以是终端设备，也可以是支持终端设备实现上述方法的芯片、芯片系统、或处理器等。所述通信装置1100还可以是第一网络设备，也可以是支持第一网络设备实现上述方法的芯片、芯片系统、或处理器等。所述通信装置1100还可以是第二网络设备，也可以是支持第二网络设备实现上述方法的芯片、芯片系统、或处理器等。该装置可用于实现上述方法实施例中描述的方法，具体可以参见上述方法实施例中的说明。
所述通信装置1100可以包括一个或多个处理器1101。所述处理器1101可以是通用处理器或者专用处理器等。例如可以是基带处理器、数字信号处理器、专用集成电路、现场可编程门阵列或者其他可编程逻 辑器件、分立门或者晶体管逻辑器件、分立硬件组件或中央处理器(central processing unit，CPU)。基带处理器可以用于对通信协议以及通信数据进行处理，中央处理器可以用于对通信装置(如，基站、基带芯片，终端、终端芯片，分布单元(distributed unit，DU)或集中单元(centralized unit，CU)等)进行控制，执行软件程序，处理软件程序的数据。
可选的，所述通信装置1100中可以包括一个或多个存储器1102，其上可以存有指令1104，所述指令可在所述处理器1101上被运行，使得所述通信装置1100执行上述方法实施例中描述的方法。可选的，所述存储器1102中还可以存储有数据。所述处理器1101和存储器1102可以单独设置，也可以集成在一起。
存储器1102可包括但不限于硬盘(hard disk drive，HDD)或固态硬盘(solid-state drive，SSD)等非易失性存储器，随机存储记忆体(Random Access Memory，RAM)、可擦除可编程只读存储器(Erasable Programmable ROM，EPROM)、ROM或便携式只读存储器(Compact Disc Read-Only Memory，CD-ROM)等等。
可选的，所述通信装置1100还可以包括收发器1105、天线1106。所述收发器1105可以称为收发单元、收发机、或收发电路等，用于实现收发功能。收发器1105可以包括接收器和发送器，接收器可以称为接收机或接收电路等，用于实现接收功能；发送器可以称为发送机或发送电路等，用于实现发送功能。
所述通信装置1100为终端设备：收发器1105用于执行上述通信方法100中的S101、S104，处理器1101用于执行上述通信方法200中的S201、S202。
所述通信装置1100为第一网络设备：收发器1105用于执行上述通信方法100中的S102、S103。
所述通信装置1100为第二网络设备：收发器1105用于执行上述通信方法100中的S101、S102、S103、S104。
另一种可能的设计中，处理器1101中可以包括用于实现接收和发送功能的收发器。例如该收发器可以是收发电路，或者是接口，或者是接口电路。用于实现接收和发送功能的收发电路、接口或接口电路可以是分开的，也可以集成在一起。上述收发电路、接口或接口电路可以用于代码/数据的读写，或者，上述收发电路、接口或接口电路可以用于信号的传输或传递。
又一种可能的设计中，可选的，处理器1101可以存有指令1103，指令1103在处理器1101上运行，可使得所述通信装置1100执行上述方法实施例中描述的方法。指令1103可能固化在处理器1101中，该种情况下，处理器1101可能由硬件实现。
又一种可能的设计中，通信装置1100可以包括电路，所述电路可以实现前述方法实施例中发送或接收或者通信的功能。本申请实施例中描述的处理器和收发器可实现在集成电路(integrated circuit，IC)、模拟IC、射频集成电路(radio frequency integrated circuit，RFIC)、混合信号IC、专用集成电路(application specific integrated circuit，ASIC)、印刷电路板(printed circuit board，PCB)、电子设备等上。该处理器和收发器也可以用各种IC工艺技术来制造，例如互补金属氧化物半导体(complementary metal oxide semiconductor，CMOS)、N型金属氧化物半导体(nMetal-oxide-semiconductor，NMOS)、P型金属氧化物半导体(positive channel metal oxide semiconductor，PMOS)、双极结型晶体管(Bipolar Junction Transistor，BJT)、双极CMOS(BiCMOS)、硅锗(SiGe)、砷化镓(GaAs)等。
本申请实施例中描述的通信装置的范围并不限于此，而且通信装置的结构可以不受图11的限制。通信装置可以是独立的设备或者可以是较大设备的一部分。例如所述通信装置可以是：
(1)独立的集成电路IC，或芯片，或，芯片系统或子系统；
(2)具有一个或多个IC的集合，可选的，该IC集合也可以包括用于存储数据，指令的存储部件；
(3)ASIC，例如调制解调器(modulator)；
(4)可嵌入在其他设备内的模块；
本申请实施例中通信装置、芯片还可执行上述通信装置1000所述的实现方式。本领域技术人员还可以了解到本申请实施例列出的各种说明性逻辑块(illustrative logical block)和步骤(step)可以通过电子硬件、电脑软件，或两者的结合进行实现。这样的功能是通过硬件还是软件来实现取决于特定的应用和整个系统的设计要求。本领域技术人员可以对于每种特定的应用，可以使用各种方法实现所述的功能，但这种实现不应被理解为超出本申请实施例保护的范围。
本申请实施例和上述通信方法100、通信方法200所示方法实施例基于同一构思，其带来的技术效果也相同，具体原理请参照上述通信方法100、通信方法200所示实施例的描述，不再赘述。
本申请还提供了一种计算机可读存储介质，用于储存计算机软件指令，当所述指令被通信装置执行时，实现上述任一方法实施例的功能。
本申请还提供了一种计算机程序产品，用于储存计算机软件指令，当所述指令被通信装置执行时，实现上述任一方法实施例的功能。
本申请还提供了一种计算机程序，当其在计算机上运行时，实现上述任一方法实施例的功能。
本申请还提供了一种通信系统，该系统包括一个或多个网络设备，以及一个或多个终端设备。在另一种可能的设计中，该系统还可以包括本申请提供的方案中与网络设备、终端设备进行交互的其他设备。
上述实施例中，可以全部或部分地通过软件、硬件、固件或者其任意组合来实现。当使用软件实现时，可以全部或部分地以计算机程序产品的形式实现。所述计算机程序产品包括一个或多个计算机指令。在计算机上加载和执行所述计算机指令时，全部或部分地产生按照本申请实施例所述的流程或功能。所述计算机可以是通用计算机、专用计算机、计算机网络、或者其他可编程装置。所述计算机指令可以存储在计算机可读存储介质中，或者从一个计算机可读存储介质向另一个计算机可读存储介质传输，例如，所述计算机指令可以从一个网站站点、计算机、服务器或数据中心通过有线(例如同轴电缆、光纤、数字用户线(digital subscriber line，DSL))或无线(例如红外、无线、微波等)方式向另一个网站站点、计算机、服务器或数据中心进行传输。所述计算机可读存储介质可以是计算机能够存取的任何可用介质或者是包含一个或多个可用介质集成的服务器、数据中心等数据存储设备。所述可用介质可以是磁性介质(例如，软盘、硬盘、磁带)、光介质(例如，高密度数字视频光盘(digital video disc，DVD))、或者半导体介质(例如，SSD)等。
以上所述，仅为本申请的具体实施方式，但本申请的保护范围并不局限于此，任何熟悉本技术领域的技术人员在本申请揭露的技术范围内，可轻易想到变化或替换，都应涵盖在本申请的保护范围之内。因此，本申请的保护范围应以所述权利要求的保护范围为准。

Claims (27)

  1. 一种通信方法，其特征在于，所述方法包括：
    终端设备在与第一网络设备之间的无线链路失败时，向第二网络设备发送第一失败信息，所述第一失败信息包括第一条件切换配置信息，所述第一网络设备是所述终端设备接入的主小区组所属的网络设备，所述第二网络设备是所述终端设备接入的辅小区组所属的网络设备；
    所述终端设备接收来自所述第二网络设备的第一响应消息，所述第一响应消息包括第一指示信息或第一小区的小区标识；
    其中，所述第一指示信息用于指示所述终端设备从所述第一条件切换配置信息配置的候选小区中选择接入的小区；
    所述第一小区是所述终端设备的待切换小区且是所述第一条件切换配置信息配置的候选小区中的小区。
  2. 根据权利要求1所述的方法，其特征在于，所述方法还包括：
    所述终端设备如果接入所述第一小区或第二小区失败，或者，接入所述第一小区或第二小区成功且在预设时长内发生无线链路失败，进行无线资源控制连接重建立；
    所述第二小区是所述终端设备根据所述第一指示信息选择接入的小区。
  3. 根据权利要求2所述的方法，其特征在于，所述方法还包括：
    所述终端设备记录第二失败信息，并向第三网络设备发送失败报告；所述失败报告包括所述第二失败信息；所述第三网络设备是所述终端设备重新接入成功的网络设备；
    所述第二失败信息包括所述第一响应消息的消息指示类型，还包括所述终端设备根据所述第一响应消息接入所述第一小区或所述第二小区失败，或者，接入所述第一小区或所述第二小区成功且在所述预设时长内发生无线链路失败；
    所述第一响应消息的消息指示类型指示所述第一响应消息包括所述第一指示信息或所述第一小区的小区标识。
  4. 根据权利要求3所述的方法，其特征在于，所述第二失败信息还包括第二指示信息，所述第二指示信息用于指示所述终端设备接收所述第一响应消息的小区为所述主小区组中的主小区。
  5. 一种通信方法，其特征在于，所述方法包括：
    第一网络设备接收来自第二网络设备的第一失败信息，所述第一失败信息包括终端设备与所述第一网络设备之间无线链路失败的信息和第一条件切换配置信息；所述第一网络设备是所述终端设备接入的主小区组所属的网络设备，所述第二网络设备是所述终端设备接入的辅小区组所属的网络设备；
    所述第一网络设备向所述第二网络设备发送第一响应信息，所述第一响应消息包括第一指示信息或第一小区的小区标识；
    其中，所述第一指示信息用于指示所述终端设备从所述第一条件切换配置信息配置的候选小区中选择接入的小区；所述第一小区是所述终端设备的待切换小区且是所述第一条件切换配置信息配置的候选小区中的小区。
  6. 根据权利要求5所述的方法，其特征在于，所述方法还包括：
    所述第一网络设备接收来自第三网络设备的失败报告，所述失败报告包括第二失败信息；
    所述第一网络设备将所述第一失败信息和所述失败报告关联；
    其中，所述第三网络设备是所述终端设备重新接入成功的网络设备；
    所述第二失败信息包括所述第一响应消息的消息指示类型，还包括所述终端设备根据所述第一响应消息接入所述第一小区或第二小区失败，或者，接入所述第一小区或第二小区成功且在预设时长内发生无线链路失败；
    所述第二小区是所述终端设备根据所述第一指示信息选择接入的小区；所述第一响应消息的消息指示 类型指示所述第一响应消息包括所述第一指示信息或所述第一小区的小区标识。
  7. 根据权利要求6所述的方法，其特征在于，所述第二失败信息包括所述终端设备根据所述第一响应消息接入所述第一小区或所述第二小区失败时，
    所述失败报告携带的小区无线网络临时标识和所述第一失败信息携带的小区无线网络临时标识相同，且所述失败报告是与所述第一失败信息的记录时间最接近的失败报告。
  8. 根据权利要求6所述的方法，其特征在于，所述第二失败信息包括所述终端设备根据所述第一响应消息接入所述第一小区或所述第二小区成功且在所述预设时长内发生无线链路失败时，
    所述失败报告携带的候选小区标识所对应的小区是所述第一失败信息中所述第一条件切换配置信息配置的候选小区中的小区，且所述失败报告是与所述第一失败信息的记录时间最接近的失败报告。
  9. 根据权利要求6至8任一项所述的方法，其特征在于，
    所述第二失败信息还包括第二指示信息，所述第二指示信息用于指示所述终端设备接收所述第一响应消息的小区为所述主小区组中的主小区。
  10. 根据权利要求5至9任一项所述的方法，其特征在于，所述方法还包括：
    所述第一网络设备统计第一时延，所述第一时延为所述第一网络设备与所述第二网络设备的站间交互平均时延。
  11. 一种通信方法，其特征在于，所述方法包括：
    第二网络设备接收来自终端设备的第一失败信息，所述第一失败信息包括所述终端设备与第一网络设备之间无线链路失败的信息和第一条件切换配置信息，所述第一网络设备是所述终端设备接入的主小区组所属的网络设备，所述第二网络设备是所述终端设备接入的辅小区组所属的网络设备；
    所述第二网络设备向所述第一网络设备发送所述第一失败信息；
    所述第二网络设备接收来自所述第一网络设备的第一响应信息；
    所述第二网络设备向所述终端设备发送所述第一响应信息；
    其中，所述第一响应消息包括第一指示信息或第一小区的小区标识；
    所述第一指示信息用于指示所述终端设备从所述第一条件切换配置信息配置的候选小区中选择接入的小区；所述第一小区是所述终端设备的待切换小区且是所述第一条件切换配置信息配置的候选小区中的小区。
  12. 根据权利要求11所述的方法，其特征在于，所述方法还包括：
    所述第二网络设备统计第二时延；所述第二时延为所述第二网络设备与所述第一网络设备交互所述第一失败信息和所述第一响应信息的站间交互平均时延，或者为所述第二网络设备与所述第一网络设备的站间交互平均时延；
    所述第二网络设备统计第三时延；所述第三时延为所述第二网络设备与所述终端设备交互所述第一失败信息和所述第一响应信息的空口交互平均时延，或者为所述第二网络设备与所述终端设备的空口交互平均时延，所述空口交互平均时延分为上行时延和下行时延。
  13. 一种通信方法，其特征在于，所述方法包括：
    终端设备如果与第一网络设备之间的无线链路失败，以及与所述第一网络设备之间的快速链路恢复失败且第一定时器未超时，将第一失败信息和第三失败信息记录在第一无线链路失败报告中；
    所述终端设备如果与所述第一网络设备之间的无线链路失败，以及与所述第一网络设备之间的快速链路恢复失败且所述第一定时器超时，将所述第一失败信息记录在第二无线链路失败报告中，以及将所述第三失败信息记录在第三无线链路失败报告中；
    其中，所述第一失败信息是所述终端设备与所述第一网络设备之间发生无线链路失败的信息，所述第三失败信息是所述终端设备执行快速链路恢复失败的信息；
    所述第一网络设备是所述终端设备接入的主小区组所属的网络设备；
    所述第一定时器是所述终端设备在检测到与所述第一网络设备之间的无线链路失败时开启的。
  14. 根据权利要求13所述的方法，其特征在于，所述第三失败信息包括以下一种或多种：指示所述终端设备是否执行快速链路恢复失败的指示信息、第三定时器的超时原因、辅小区组发生无线链路失败的原因、辅小区组去激活。
  15. 根据权利要求13或14所述的方法，其特征在于，所述方法还包括：
    所述终端设备向第四网络设备发送所述第一无线链路失败报告，或者，发送所述第二无线链路失败报告，或者，发送所述第三无线链路失败报告；
    所述第四网络设备是所述终端设备检测到与所述第一网络设备之间的无线链路失败，且与所述第一网络设备之间的快速链路恢复失败后接入成功的网络设备。
  16. 根据权利要求13所述的方法，其特征在于，所述方法还包括：
    所述终端设备在利用第三小区进行基于条件切换的恢复失败时，根据第二定时器确定所述第一失败信息、所述第三失败信息和第四失败信息的记录方式；
    所述第四失败信息是所述终端设备利用所述第三小区进行所述基于条件切换的恢复失败的信息；
    所述第三小区是所述终端设备检测到与所述第一网络设备之间的无线链路失败，以及与所述第一网络设备之间的快速链路恢复失败后通过小区选择获得的且是第一条件切换配置信息配置的候选小区中的小区；
    所述第二定时器是所述终端设备在检测到与所述第一网络设备之间的快速链路恢复失败时开启的。
  17. 根据权利要求16所述的方法，其特征在于，所述第一失败信息和所述第三失败信息记录在所述第一无线链路失败报告中；
    所述根据第二定时器确定所述第一失败信息、所述第三失败信息和第四失败信息的记录方式，包括：
    如果第二定时器未超时，将第四失败信息记录在所述第一无线链路失败报告中；
    如果第二定时超时，将第四失败信息记录在第四无线链路失败报告中。
  18. 根据权利要求16所述的方法，其特征在于，所述第一失败信息记录在所述第二无线链路失败报告中，所述第二失败信息记录在所述第三无线链路失败报告中；
    所述根据第二定时器确定所述第一失败信息、所述第三失败信息和第四失败信息的记录方式，包括：
    如果第二定时器未超时，将第四失败信息记录在所述第二无线链路失败报告或所述第三无线链路失败报告中；
    如果第二定时器超时，将第四失败信息记录在第四无线链路失败报告中。
  19. 根据权利要求17项所述的方法，其特征在于，所述方法还包括：
    所述终端设备向第三网络设备发送所述第一无线链路失败报告，或者，发送所述第四无线链路失败报告；
    所述第三网络设备是所述终端设备重新接入成功的网络设备。
  20. 根据权利要求18项所述的方法，其特征在于，所述方法还包括：
    所述终端设备向第三网络设备发送所述第二无线链路失败报告，或者，发送所述第三无线链路失败报告，或者发送所述第四无线链路失败报告；
    所述第三网络设备是所述终端设备进行所述基于条件切换的恢复失败后重新接入成功的网络设备。
  21. 一种通信装置，其特征在于，所述装置包括：
    通信单元，用于在与第一网络设备之间的无线链路失败时，向第二网络设备发送第一失败信息，所述第一失败信息包括第一条件切换配置信息，所述第一网络设备是所述装置接入的主小区组所属的网络设备，所述第二网络设备是所述装置接入的辅小区组所属的网络设备；
    所述通信单元，还用于接收来自所述第二网络设备的第一响应消息，所述第一响应消息包括第一指示 信息或第一小区的小区标识；
    其中，所述第一指示信息用于指示所述装置从所述第一条件切换配置信息配置的候选小区中选择接入的小区；
    所述第一小区是所述装置的待切换小区且是所述第一条件切换配置信息配置的候选小区中的小区。
  22. 一种通信装置，其特征在于，所述装置包括：
    通信单元，用于接收来自第二网络设备的第一失败信息，所述第一失败信息包括终端设备与所述装置之间无线链路失败的信息和第一条件切换配置信息，所述装置是所述终端设备接入的主小区组所属的装置，所述第二网络设备是所述终端设备接入的辅小区组所属的网络设备；
    所述通信单元，还用于向所述第二网络设备发送第一响应信息；所述第一响应消息包括第一指示信息或第一小区的小区标识；
    其中，所述第一指示信息用于指示所述终端设备从所述第一条件切换配置信息配置的候选小区中选择接入的小区；所述第一小区是所述终端设备的待切换小区且是所述第一条件切换配置信息配置的候选小区中的小区。
  23. 一种通信装置，其特征在于，所述装置包括：
    通信单元，用于接收来自终端设备的第一失败信息，所述第一失败信息包括所述终端设备与第一网络设备之间无线链路失败的信息和第一条件切换配置信息，所述第一网络设备是所述终端设备接入的主小区组所属的网络设备，所述装置是所述终端设备接入的辅小区组所属的装置；
    所述通信单元，还用于向所述第一网络设备发送所述第一失败信息；
    所述通信单元，还用于接收来自所述第一网络设备的第一响应信息；
    所述通信单元，还用于向所述终端设备发送所述第一响应信息；
    其中，所述第一响应消息包括第一指示信息或第一小区的小区标识；
    所述第一指示信息用于指示所述终端设备从所述第一条件切换配置信息配置的候选小区中选择接入的小区；所述第一小区是所述终端设备的待切换小区且是所述第一条件切换配置信息配置的候选小区中的小区。
  24. 一种通信装置，其特征在于，所述装置包括：
    处理单元，用于如果与第一网络设备之间的无线链路失败，以及与所述第一网络设备之间的快速链路恢复失败且第一定时器未超时，将第一失败信息和第三失败信息记录在第一无线链路失败报告中；
    所述处理单元，还用于如果与所述第一网络设备之间的无线链路失败，以及与所述第一网络设备之间的快速链路恢复失败且所述第一定时器超时，将所述第一失败信息记录在第二无线链路失败报告中，以及将所述第三失败信息记录在第三无线链路失败报告中；
    其中，所述第一失败信息是所述装置与所述第一网络设备之间发生无线链路失败的信息，所述第三失败信息是所述装置执行快速链路恢复失败的信息；
    所述第一网络设备是所述装置接入的主小区组所属的网络设备；
    所述第一定时器是所述装置在检测到与所述第一网络设备之间的无线链路失败时开启的。
  25. 一种通信装置，其特征在于，包括处理器和收发器，所述收发器用于与其它通信装置进行通信；所述处理器用于运行程序，以使得所述通信装置实现权利要求1至4任一项所述的方法，或者实现权利要求5至10任一项所述的方法，或者实现权利要求11或12所述的方法，或者实现权利要求13至20任一项所述的方法。
  26. 一种计算机可读存储介质，其特征在于，所述计算机可读存储介质用于存储有指令，当其在计算机上运行时，使得权利要求1至4任一项所述的方法被执行，或者使得权利要求5至10任一项所述的方法被执行，或者使得权利要求11或12所述的方法被执行，或者使得权利要求13至20任一项所述的方法被执行。
  27. 一种包含指令的计算机程序产品，其特征在于，当其在计算机上运行时，使得权利要求1至4任一 项所述的方法被执行，或者使得权利要求5至10任一项所述的方法被执行，或者使得权利要求11或12所述的方法被执行，或者使得权利要求13至20任一项所述的方法被执行。
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CN113453273A (zh) * 2020-03-26 2021-09-28 夏普株式会社 无线链路失败报告方法以及用户设备
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WO2022075626A1 (ko) * 2020-10-08 2022-04-14 삼성전자 주식회사 무선 통신에서의 링크 관리 방법 및 장치
CN114451063A (zh) * 2019-09-30 2022-05-06 华为技术有限公司 通信方法和通信装置
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CN114451063A (zh) * 2019-09-30 2022-05-06 华为技术有限公司 通信方法和通信装置
CN113453273A (zh) * 2020-03-26 2021-09-28 夏普株式会社 无线链路失败报告方法以及用户设备
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