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WO2024103267A1 - 小区变更失败处理方法、装置、通信装置和存储介质 - Google Patents

小区变更失败处理方法、装置、通信装置和存储介质 Download PDF

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Publication number
WO2024103267A1
WO2024103267A1 PCT/CN2022/132100 CN2022132100W WO2024103267A1 WO 2024103267 A1 WO2024103267 A1 WO 2024103267A1 CN 2022132100 W CN2022132100 W CN 2022132100W WO 2024103267 A1 WO2024103267 A1 WO 2024103267A1
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WO
WIPO (PCT)
Prior art keywords
cell
terminal
connection
resource control
radio resource
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/CN2022/132100
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English (en)
French (fr)
Inventor
罗星熠
吴昱民
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Beijing Xiaomi Mobile Software Co Ltd
Original Assignee
Beijing Xiaomi Mobile Software Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Beijing Xiaomi Mobile Software Co Ltd filed Critical Beijing Xiaomi Mobile Software Co Ltd
Priority to EP22965458.7A priority Critical patent/EP4622191A4/en
Priority to CN202280004953.8A priority patent/CN118355637B/zh
Priority to PCT/CN2022/132100 priority patent/WO2024103267A1/zh
Publication of WO2024103267A1 publication Critical patent/WO2024103267A1/zh
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/10—Connection setup
    • H04W76/19—Connection re-establishment
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W24/00—Supervisory, monitoring or testing arrangements
    • H04W24/04—Arrangements for maintaining operational condition
    • 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
    • H04W36/08—Reselecting an access point
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W74/00—Wireless channel access
    • H04W74/08—Non-scheduled access, e.g. ALOHA
    • H04W74/0833—Random access procedures, e.g. with 4-step access

Definitions

  • the present disclosure relates to the field of communication technology, and in particular to a method for processing a cell change failure, a device for processing a cell change failure, a communication device, and a computer-readable storage medium.
  • the terminal can change the cell, but due to various factors, the cell change operation cannot be guaranteed to be successful, and there may be cases where the cell change fails.
  • This embodiment proposes a method for processing a cell change failure, a device for processing a cell change failure, a communication device, and a computer-readable storage medium to solve technical problems in related technologies.
  • a method for processing a cell change failure is proposed, which is executed by a terminal.
  • the method includes: determining that at least one cell change has failed; and performing connection recovery.
  • a method for handling cell change failure is proposed, which is executed by a network device.
  • the method includes: when a terminal fails to perform at least one cell change, restoring a connection with the terminal.
  • a device for processing a cell change failure comprising: a processing module configured to determine that at least one cell change has failed; and a connection module configured to perform connection recovery.
  • a device for processing a cell change failure comprising: a connection module configured to restore connection with the terminal when the terminal fails to perform at least one cell change.
  • a cell change failure processing system comprising a terminal and a network device, wherein the terminal is configured to implement the above-mentioned cell change failure processing method executed by the terminal, and the network device is configured to implement the above-mentioned cell change failure processing method executed by the network device.
  • a communication device comprising: a processor; a memory for storing a computer program; wherein, when the computer program is executed by the processor, the above-mentioned cell change failure processing method executed by the terminal is implemented.
  • a communication device comprising: a processor; a memory for storing a computer program; wherein, when the computer program is executed by the processor, the above-mentioned cell change failure processing method executed by the network device is implemented.
  • a computer-readable storage medium for storing a computer program.
  • the computer program is executed by a processor, the above-mentioned cell change failure processing method executed by the terminal is implemented.
  • a computer-readable storage medium for storing a computer program.
  • the computer program is executed by a processor, the above-mentioned cell change failure processing method executed by a network device is implemented.
  • the terminal when the terminal determines that at least one cell change has failed, it can perform connection recovery and restore the connection with the cell, thereby ensuring that the terminal can continue to maintain communication without causing communication interruption due to the lack of connection to the cell due to at least one cell change failure.
  • FIG1 is a schematic flow chart of a method for processing a cell change failure according to an embodiment of the present disclosure.
  • FIG2 is a schematic flow chart of another method for processing a cell change failure according to an embodiment of the present disclosure.
  • FIG4 is a schematic flowchart of another method for processing a cell change failure according to an embodiment of the present disclosure.
  • FIG5 is a schematic flowchart showing another method for processing a cell change failure according to an embodiment of the present disclosure.
  • FIG6 is a schematic flowchart showing another method for processing a cell change failure according to an embodiment of the present disclosure.
  • FIG. 7 is a schematic flowchart showing another method for processing a cell change failure according to an embodiment of the present disclosure.
  • FIG8 is a schematic flowchart of a method for processing a cell change failure according to an embodiment of the present disclosure.
  • FIG. 9 is a schematic flowchart showing another method for processing a cell change failure according to an embodiment of the present disclosure.
  • FIG. 10 is a schematic flowchart showing another method for processing a cell change failure according to an embodiment of the present disclosure.
  • FIG. 11 is a schematic flowchart showing another method for processing a cell change failure according to an embodiment of the present disclosure.
  • FIG. 12 is a schematic flowchart showing another method for processing a cell change failure according to an embodiment of the present disclosure.
  • FIG. 13 is a schematic flowchart showing another method for processing a cell change failure according to an embodiment of the present disclosure.
  • FIG. 14 is a schematic block diagram of a device for processing a cell change failure according to an embodiment of the present disclosure.
  • FIG. 15 is a schematic block diagram of a device for processing a cell change failure according to an embodiment of the present disclosure.
  • FIG. 16 is a schematic block diagram of an apparatus for handling cell change failure according to an embodiment of the present disclosure.
  • FIG. 17 is a schematic block diagram of an apparatus for handling cell change failure according to an embodiment of the present disclosure.
  • first, second, third, etc. may be used to describe various information in the disclosed embodiments, these information should not be limited to these terms. These terms are only used to distinguish the same type of information from each other.
  • first information may also be referred to as the second information, and similarly, the second information may also be referred to as the first information.
  • word "if” as used herein may be interpreted as "at the time of” or "when” or "in response to determining”.
  • the terms used herein to characterize size relationships are “greater than” or “less than”, “higher than” or “lower than”. However, those skilled in the art can understand that the term “greater than” also covers the meaning of “greater than or equal to”, and “less than” also covers the meaning of “less than or equal to”; the term “higher than” covers the meaning of “higher than or equal to”, and “lower than” also covers the meaning of "lower than or equal to”.
  • FIG1 is a schematic flow chart of a method for handling a cell change failure according to an embodiment of the present disclosure.
  • the method for handling a cell change failure shown in this embodiment can be executed by a terminal, and the terminal includes but is not limited to a communication device such as a mobile phone, a tablet computer, a wearable device, a sensor, an Internet of Things device, etc.
  • the terminal can communicate with a network device, and the network device includes but is not limited to a network device in a 4G, 5G, 6G, etc. communication system, such as a base station, a core network, etc.
  • the cell change failure processing method may include the following steps:
  • step S101 it is determined that at least one cell change (Switch) fails;
  • step S102 connection recovery is performed.
  • At least one cell change is different from the cell handover (handover) in the related art.
  • the measurement operation of the cell during the cell switching process is performed at L3 (layer 3), and operations such as cell selection/reselection need to be performed, and the cell switching process needs to be implemented based on RRC signaling.
  • the measurement operation of at least one cell is performed at L1 (layer 1), and operations such as cell selection/cell reselection may not be performed, and may not be implemented based on RRC signaling.
  • At least one cell may be regarded as a cell set, and the cell set includes one or more cells.
  • the cell set includes multiple cells, each of the multiple cells may be of the same type, or at least two of the multiple cells may be of different types. This embodiment may be applicable to any subsequent embodiment involving at least one cell.
  • the at least one cell includes at least one of the following:
  • MCG Master Cell Group
  • Pcell Primary cell
  • the terminal can communicate in at least one cell.
  • the terminal in a dual connectivity (DC) scenario, the terminal can communicate with a network device on a primary cell group and a secondary cell group (SCG).
  • SCG secondary cell group
  • CA carrier aggregation
  • the terminal in a carrier aggregation (CA) scenario, the terminal can communicate on a primary cell and at least one secondary cell.
  • the terminal in a non-carrier aggregation scenario, the terminal can communicate on the primary cell.
  • DC dual connectivity
  • SCG secondary cell group
  • CA carrier aggregation
  • the terminal in a non-carrier aggregation scenario, the terminal can communicate on the primary cell.
  • the primary cell group may include a primary cell and at least one secondary cell; the secondary cell group may include a primary secondary cell (PScell) and at least one secondary cell.
  • PScell primary secondary cell
  • composition of the primary cell group and the secondary cell group is not limited to the above, and can be specifically set as needed.
  • the terminal may determine that at least one cell change is required.
  • the terminal may determine that at least one cell change is required. The following describes several examples of such events:
  • the terminal when the terminal receives a switch command sent by the first cell in the at least one cell, it can be determined that the first cell requires the terminal to perform at least one cell change.
  • the first cell can be one or more cells in at least one cell where the terminal is located before performing at least one cell change.
  • the at least one cell before the change is an MCG
  • the first cell can be a primary cell (Pcell) in the MCG or one or more secondary cells (Scell) in the MCG.
  • the terminal determines that the condition for triggering the at least one cell change is met, it can be determined that the terminal itself needs to make at least one cell change, for example, triggered by the user of the terminal, so that it can be determined that at least one cell change is needed.
  • the events that cause the terminal to determine that at least one cell change is required are not limited to the above-mentioned ones, and can be specifically set as needed.
  • the terminal when the terminal determines that at least one cell change is required, the terminal may perform at least one cell change.
  • At least one cell includes an MCG
  • at least one cell change is performed, and the MCG may be changed, for example, all cells (primary cells and secondary cells) in the MCG may be changed, or some cells in the MCG may be changed.
  • At least one cell when at least one cell includes a primary cell, at least one cell change may be performed to change the primary cell.
  • At least one cell includes a primary cell and at least one secondary cell
  • at least one cell change is performed, and the primary cell and the at least one secondary cell may be changed.
  • At least one cell change failure may occur.
  • the situation of at least one cell change failure is described in subsequent embodiments and will not be expanded here.
  • the terminal when the terminal determines that at least one cell change has failed, it can perform connection recovery to restore the connection with the cell, thereby ensuring that the terminal can continue to maintain communication without causing communication interruption due to the lack of connection to the cell due to at least one cell change failure.
  • FIG2 is a schematic flow chart of another method for processing a cell change failure according to an embodiment of the present disclosure. As shown in FIG2, the determining that at least one cell change fails includes:
  • step S201 when a timer associated with at least one cell change times out, it is determined that at least one cell change fails.
  • a timer associated with at least one cell change may be configured in the terminal, and when the timer times out, the terminal may determine that at least one cell change has failed.
  • the timeout duration of the timer may be configured by the network device or determined according to a protocol agreement. When the timer starts counting and the counting duration is greater than or equal to the timeout duration, it may be determined that the timer has timed out.
  • timer timeout duration is essentially a preset duration, so the implementation method of this embodiment can be described as starting from determining that at least one cell change is required, if at least one cell change is not confirmed to be successful for the first preset duration, then it is determined that at least one cell change has failed.
  • the event that triggers the timer to start timing includes at least one of the following:
  • the change command may be a master cell group change command (MCG switch command);
  • a primary cell among the at least one cell is released.
  • the first cell does not refer to a specific cell, but refers to any cell of at least one cell where the terminal is located before at least one cell change is performed.
  • these two situations have been described in the previous embodiments and will not be repeated here.
  • the description is mainly for the following two situations: sending feedback of the change command to the first cell; releasing the primary cell in the at least one cell.
  • the terminal after receiving the change command sent by the first cell in the at least one cell, the terminal sends feedback of the change command to the first cell, and it can be determined that the terminal agrees with the change command, then at least one cell change is required.
  • the feedback can be sent in the form of a hybrid automatic repeat request (HARQ) or a media access control layer control element (MAC CE), which can be set as needed.
  • HARQ hybrid automatic repeat request
  • MAC CE media access control layer control element
  • the terminal when the terminal releases the primary cell in the at least one cell (including but not limited to releasing the MAC layer parameters of the primary cell), it can be determined that at least one cell change is required. Since the terminal communicates on at least one cell, mainly on the primary cell in the at least one cell, when the terminal releases the primary cell, it will not communicate on the primary cell, so it can be determined that at least one cell change is required.
  • the terminal when the terminal determines an event that triggers the timer to start timing, the terminal may start the timer.
  • the event that triggers the timer to end timing includes:
  • the random access initiated to the target cell is successful.
  • the target cell may be one or more cells among at least one cell to which the terminal needs to change.
  • the target cell when at least one cell includes an MCG, the target cell may be the MCG to be changed, such as the primary cell and the secondary cell in the MCG, or the target cell may be the primary cell in the MCG to be changed, or the target cell may be the secondary cell in the MCG to be changed.
  • the target cell may be the primary cell to which the target cell needs to be changed.
  • the target cell when at least one cell includes a main cell and at least one secondary cell, the target cell may be the main cell and the secondary cell among the main cell and the at least one secondary cell to be changed, or the target cell may be the main cell and the primary cell among the main cell and the at least one secondary cell to be changed, or the target cell may be the secondary cell among the main cell and the at least one secondary cell to be changed.
  • the terminal may perform at least one cell change based on random access, such as initiating random access to the target cell.
  • the random access is a 4-step random access
  • the terminal may determine that the random access is successful when receiving the 4th message Msg4 of the 4-step random access
  • the random access is a 2-step random access
  • the terminal may determine that the random access is successful when receiving the 2nd message Msg4 of the 2-step random access.
  • the timer Before the timer times out, if the terminal determines that the random access initiated to the target cell is successful, the timer can be ended. When it is determined that at least one cell change is required next time (for example, the next time an event occurs that causes the terminal to determine that at least one cell change is required, please refer to the previous embodiment for the specific event, which will not be repeated here), the timer is restarted, and the timer starts again. If the terminal fails to determine that the random access initiated to the target cell is successful before the timer times out, then when the timer times out, the terminal can determine that at least one cell change has failed.
  • the source cell before the change and the target cell after the change can be cells or cell groups under the same base station, or cells or cell groups under different base stations.
  • the event that triggers the timer to end timing includes at least one of the following:
  • Feedback information indicating successful access is received.
  • the feedback information may be sent in an explicit manner or an implicit manner.
  • the following embodiments mainly exemplarily describe the explicit manner.
  • the target cell is at least one cell to which the terminal needs to change.
  • At least one cell change performed by the terminal may not be based on random access.
  • the terminal may send a notification message (such as MAC CE) to the target cell to notify the target cell that the terminal wants to change to the target cell.
  • a notification message such as MAC CE
  • the terminal can determine that at least one cell is successfully changed to the target cell.
  • the terminal can determine that at least one cell is successfully changed to the target cell.
  • the terminal receives a downlink transmission sent by the target cell.
  • the terminal may receive a downlink transmission sent by the target cell within the second preset time range starting from the time when the terminal sends a notification message to the target cell. Since the target cell will send a downlink transmission to the terminal only after the terminal successfully changes to the target cell, the terminal can determine that at least one cell change is successful when receiving a downlink transmission sent by the target cell.
  • the downlink transmission includes but is not limited to a physical downlink control channel (PDCCH), for example, it may be a PDCCH scrambled by a cell-radio network temporary identifier (C-RNTI) of the terminal.
  • PDCCH physical downlink control channel
  • C-RNTI cell-radio network temporary identifier
  • the terminal receives downlink control information (Downlink Control Information, DCI) sent by the target cell for scheduling a new transmission (which can be a new uplink transmission or a new downlink transmission).
  • DCI Downlink Control Information
  • the terminal receives the downlink control information sent by the target cell for scheduling the new transmission. Since the target cell will send downlink control information for scheduling the new transmission to the terminal only after the terminal successfully changes to the target cell, the terminal can determine that at least one cell change is successful when receiving the DCI sent by the target cell for scheduling the new transmission.
  • the DCI for scheduling the new transmission can be a DCI scrambled by the cell radio network temporary identifier C-RNTI of the terminal.
  • the terminal receives feedback information indicating successful access.
  • the feedback information may be feedback for the notification information, and specifically may be feedback information sent by the target cell received by the terminal within a fourth preset time range from the time when the terminal sends the notification information to the target cell. Since the target cell will send feedback information to the terminal to notify the terminal of successful access only after the terminal successfully changes to the target cell, the terminal may determine that at least one cell change is successful when receiving feedback information indicating successful access.
  • the events that cause the terminal to determine that at least one cell change is required to be successful are not limited to the above-mentioned ones, and can be specifically set as needed.
  • the event that triggers the timer associated with at least one cell change to end timing may be the same as the event that causes the terminal to determine that at least one cell change is required to succeed. Then, the terminal may control the timer to end timing when determining that at least one cell change is successful, so that the timer does not time out, and the terminal does not determine that at least one cell change fails.
  • the feedback information includes at least one of the following:
  • Media access control layer signaling such as MAC CE
  • Physical layer signaling such as DCI.
  • MAC CE Take feedback information as MAC CE for example.
  • a new MAC CE can be defined as feedback information; in another embodiment, the contention resolution MAC CE can be reused, but all values in MAC CE need to be set to predefined values (such as 0 or 1).
  • FIG2 can be implemented independently or based on any of the above embodiments.
  • the embodiment can be implemented according to the following steps:
  • the terminal may determine that at least one cell change fails, and thus may perform connection recovery.
  • connection recovery The following describes the manner of performing connection recovery by way of example through several embodiments.
  • FIG3 is a schematic flow chart of another method for handling a cell change failure according to an embodiment of the present disclosure. As shown in FIG3 , performing connection recovery includes:
  • step S301 when there is a secondary cell group, at least one cell change failure information is sent to the secondary cell group;
  • step S302 connection recovery is performed according to the control of the secondary cell group.
  • the network device configures the terminal so that the terminal can send at least one cell change failure message to the secondary cell group, or the protocol stipulates that the terminal can send at least one cell change failure message to the secondary cell group, then the terminal can send at least one cell change failure message to the secondary cell group, and then the connection can be restored under the control of the secondary cell group.
  • the process of the secondary cell group controlling the terminal to restore the connection is specifically based on the implementation of the secondary cell group, and the present disclosure does not limit it.
  • the secondary cell group can control the terminal to access the secondary cell group as at least one cell to restore the connection, for example, the secondary cell group can specify a cell group as at least one cell access for the terminal to restore the connection.
  • the performing connection recovery further includes:
  • a cell selection is performed, and radio resource control is reestablished through the selected cell to restore the connection.
  • the network device when there is no secondary cell group, for example, the network device does not configure a secondary cell group for the terminal, or configures a secondary cell group for the terminal but the secondary cell group is in an unavailable state, the terminal can perform cell selection and then perform radio resource control reconstruction through the selected cell to restore the connection.
  • radio resource control reconstruction in this embodiment may be different from the radio resource control reconstruction in the related art.
  • performing radio resource control reestablishment through the selected cell to restore the connection includes:
  • connection recovery is performed on the candidate cell according to the radio resource control parameters.
  • the candidate cell may be selected by the network device for the terminal based on the measurement result after the terminal performs measurement and reports the measurement result through L3 before making at least one cell change, and the network device configures the radio resource control parameters of the candidate cell for the terminal.
  • the terminal When the terminal selects a candidate cell during cell selection, it can perform connection recovery on the candidate cell according to the pre-configured wireless resource control parameters of the candidate cell.
  • the network device since the wireless resource control parameters of the candidate cell have been configured to the terminal by the network device before the terminal makes at least one cell selection, in this embodiment, the network device only needs to configure the terminal with wireless resource control parameters other than the pre-configured wireless resource control parameters.
  • performing radio resource control reestablishment through the selected cell to restore the connection includes:
  • connection recovery is performed on the selected cell according to the radio resource control parameters configured for the source cell.
  • the network device may instruct the terminal to perform connection recovery on the selected cell according to the radio resource control parameters configured for the source cell. Since the radio resource control parameters of the source cell have been configured by the network device to the terminal before the terminal performs at least one cell selection, the network device in this embodiment only needs to configure the radio resource control parameters other than the pre-configured radio resource control parameters for the terminal. Accordingly, it is helpful to simplify the process of the network device configuring the radio resource control parameters for the terminal during the connection recovery process, and thus it is helpful to complete the connection recovery as soon as possible.
  • FIG3 can be implemented independently or based on any of the above embodiments.
  • the embodiment can be implemented according to the following steps:
  • connection recovery is performed according to the control of the secondary cell group.
  • FIG4 is a schematic flow chart of another method for handling a cell change failure according to an embodiment of the present disclosure. As shown in FIG4 , performing connection recovery includes:
  • step S401 connection recovery is performed through the source cell.
  • the source cell may be one or more cells in at least one cell where the terminal is located before performing at least one cell change.
  • the source cell when at least one cell includes an MCG, the source cell may be the MCG in which at least one cell change is made, such as a primary cell and a secondary cell in the MCG, or the source cell may be the primary cell in the MCG in which at least one cell change is made, or the source cell may be the secondary cell in the MCG in which at least one cell change is made.
  • the source cell may be the primary cell before at least one cell change is performed.
  • the source cell when at least one cell includes a main cell and at least one secondary cell, the source cell may be the main cell and the secondary cell of the main cell and at least one secondary cell before at least one cell change is made, or the source cell may be the main cell of the main cell and at least one secondary cell before at least one cell change is made, or the source cell may be the secondary cell of the main cell and at least one secondary cell before at least one cell change is made.
  • the terminal may not select a cell and directly restore the connection through the source cell, for example, continue to communicate on the source cell.
  • the target cell may send feedback to the source cell to notify the source cell that the terminal has successfully changed to the target cell.
  • the source cell may maintain the connection with the terminal so that the terminal can directly restore the connection through the source cell when at least one cell change fails; the source cell will release the connection with the terminal only after receiving feedback from the target cell.
  • the source cell can maintain the connection with the terminal so that the terminal can recover the connection through the source cell, there is no need to reestablish the radio resource control during this process, which facilitates the terminal to quickly recover the connection.
  • the performing connection recovery through the source cell includes:
  • the terminal recovers the connection through the source cell, and can first send at least one cell change failure information to the source cell to notify the source cell that the terminal has experienced at least one cell change failure, thereby ensuring that the source cell can learn that the terminal needs to access the source cell, and then the terminal accesses the source cell and can communicate with the source cell smoothly, without the need to rebuild wireless resource control during this process.
  • the performing connection recovery further includes:
  • cell selection is performed, and radio resource control is reestablished through the selected cell to restore the connection.
  • the terminal needs to access the source cell to restore the connection through the source cell. For example, at least one cell change failure message is first sent to the source cell, and when the downlink transmission of the first cell in the at least one cell is received, it can be determined that the access to the source cell is successful. If the downlink transmission of the first cell in the at least one cell is not received, for example, the downlink transmission of the first cell in the at least one cell is not received within the fourth preset time range from sending at least one cell change failure message to the source cell, it can be determined that the access to the source cell has failed, then the terminal can select a cell and reconstruct the radio resource control through the selected cell to restore the connection.
  • radio resource control reconstruction in this embodiment may be different from the radio resource control reconstruction in the related art.
  • performing radio resource control reestablishment through the selected cell to restore the connection includes:
  • connection recovery is performed on the candidate cell according to the radio resource control parameters.
  • the candidate cell may be selected by the network device for the terminal based on the measurement result after the terminal performs measurement and reports the measurement result through L3 before making at least one cell change, and the network device configures the radio resource control parameters of the candidate cell for the terminal.
  • the terminal When the terminal selects a candidate cell during cell selection, it can perform connection recovery on the candidate cell according to the pre-configured wireless resource control parameters of the candidate cell.
  • the network device since the wireless resource control parameters of the candidate cell have been configured to the terminal by the network device before the terminal makes at least one cell selection, in this embodiment, the network device only needs to configure the terminal with wireless resource control parameters other than the pre-configured wireless resource control parameters.
  • performing radio resource control reestablishment through the selected cell to restore the connection includes:
  • connection recovery is performed on the selected cell according to the radio resource control parameters configured for the source cell.
  • the network device may instruct the terminal to perform connection recovery on the selected cell according to the radio resource control parameters configured for the source cell. Since the radio resource control parameters of the source cell have been configured by the network device to the terminal before the terminal performs at least one cell selection, the network device in this embodiment only needs to configure the radio resource control parameters other than the pre-configured radio resource control parameters for the terminal. Accordingly, it is helpful to simplify the process of the network device configuring the radio resource control parameters for the terminal during the connection recovery process, and thus it is helpful to complete the connection recovery as soon as possible.
  • FIG4 can be implemented independently or based on any of the above embodiments.
  • the embodiment can be implemented according to the following steps:
  • connection is restored through the source cell.
  • FIG5 is a schematic flow chart of another method for handling cell change failure according to an embodiment of the present disclosure. As shown in FIG5 , the method further includes:
  • step S501 a plurality of predetermined cells are evaluated
  • step S502 a cell that meets the evaluation condition is determined
  • the performing of connection recovery includes:
  • step S503 connection recovery is performed through the cell that meets the evaluation condition.
  • the terminal may predetermine multiple cells, for example, the multiple cells may be determined according to a protocol agreement, and the multiple cells may also be determined according to a cell list configured by a network device.
  • the terminal may evaluate multiple cells and determine a cell that meets the evaluation conditions, and then after at least one cell change fails, when connection recovery is performed, the connection may be restored through the cell that meets the evaluation conditions (for example, through radio resource control reconstruction), without having to perform a cell selection operation, thereby facilitating rapid completion of connection recovery.
  • the method of evaluating multiple cells can be set as needed, and the present disclosure does not limit it.
  • the channel condition of the cell can be characterized by the average beam quality Q of the cell (for example, determined by the average of multiple measurements of the beam quality of the cell).
  • the cell can be determined as a cell that meets the evaluation condition and added to the candidate cell set.
  • the terminal can subsequently select a cell in the candidate cell set for connection recovery.
  • the evaluation can continue.
  • the Q of a certain evaluation is not greater than the threshold T1
  • the cell can be removed from the candidate cell set.
  • the Q measured by the evaluation condition N times in a row is greater than the threshold value T1
  • the threshold value T2 which can be equal to T1, or a value smaller than T1, or a value larger than T1
  • the cell can be removed from the candidate cell set.
  • the terminal when there are multiple cells that meet the evaluation conditions, can select a cell for connection recovery by itself, or determine a cell for connection recovery according to a predefined rule, such as selecting a cell that meets the evaluation results in the most recent evaluation for connection recovery.
  • the network device informs the terminal of the timing advance (TA) of the cell that meets the evaluation conditions in advance through the timing advance management (TA management), then it can be considered that the terminal has completed uplink synchronization on the cell, and it is not necessary to perform random access, and information can be sent to the cell, such as using reserved resources (which can be pre-configured) to send messages, which is conducive to quickly completing connection recovery. For cells that meet the evaluation conditions but have not been notified to the TA in advance, random access is required for the terminal to perform connection recovery on the cell.
  • TA timing advance
  • the predetermined multiple cells include at least one of the following:
  • the network device when the source cell meets the evaluation conditions, since the wireless resource control parameters of the source cell are known to the terminal, when the terminal restores the connection through the source cell, the network device does not need to reconfigure the wireless resource control parameters of the source cell for the terminal. Accordingly, it is helpful to simplify the process of the network device configuring the wireless resource control parameters for the terminal during the connection recovery process, which is conducive to completing the connection recovery as soon as possible.
  • the terminal when the candidate cell meets the evaluation conditions, the terminal performs connection recovery through the candidate cell.
  • the candidate cell may be selected by the network device for the terminal according to the measurement result after the terminal performs measurement and reports the measurement result through L3 before performing at least one cell change, and the network device configures the radio resource control parameters (such as physical downlink control channel resources, etc.) of the candidate cell for the terminal.
  • the radio resource control parameters such as physical downlink control channel resources, etc.
  • the reason is generally that the service quality of the source cell is relatively poor.
  • the connection is restored through the source cell, and the source cell may not be a suitable cell. If the connection is restored by radio resource control reestablishment after at least one cell change fails, it takes a long time because cell selection is required, resulting in a long connection interruption time.
  • the network device since the radio resource control parameters of the candidate cells have been configured by the network device to the terminal before the terminal performs at least one cell selection, for the candidate cells, the network device only needs to configure the radio resource control parameters other than the pre-configured radio resource control parameters to the terminal. Accordingly, compared with connection recovery through the source cell, it is beneficial to perform connection recovery through a more suitable cell, and compared with connection recovery through radio resource control reconstruction, it is beneficial to simplify the process of the network device configuring the radio resource control parameters for the terminal during the connection recovery process, so as to complete the connection recovery as soon as possible.
  • the performing connection recovery further includes:
  • cell selection is performed, and radio resource control is reestablished through the selected cell to restore the connection.
  • the terminal evaluates multiple cells. It may happen that there is no cell that meets the evaluation conditions. In this case, the terminal can select a cell and reestablish the radio resource control through the selected cell to restore the connection.
  • radio resource control reconstruction in this embodiment may be different from the radio resource control reconstruction in the related art.
  • performing radio resource control reestablishment through the selected cell to restore the connection includes:
  • connection recovery is performed on the candidate cell according to the radio resource control parameters.
  • the candidate cell may be selected by the network device for the terminal based on the measurement result after the terminal performs measurement and reports the measurement result through L3 before making at least one cell change, and the network device configures the radio resource control parameters of the candidate cell for the terminal.
  • the terminal When the terminal selects a candidate cell during cell selection, it can perform connection recovery on the candidate cell according to the pre-configured wireless resource control parameters of the candidate cell.
  • the network device since the wireless resource control parameters of the candidate cell have been configured to the terminal by the network device before the terminal makes at least one cell selection, in this embodiment, the network device only needs to configure the terminal with wireless resource control parameters other than the pre-configured wireless resource control parameters.
  • performing radio resource control reestablishment through the selected cell to restore the connection includes:
  • connection recovery is performed on the selected cell according to the radio resource control parameters configured for the source cell.
  • the network device may instruct the terminal to perform connection recovery on the selected cell according to the radio resource control parameters configured for the source cell. Since the radio resource control parameters of the source cell have been configured by the network device to the terminal before the terminal performs at least one cell selection, the network device in this embodiment only needs to configure the radio resource control parameters other than the pre-configured radio resource control parameters for the terminal. Accordingly, it is helpful to simplify the process of the network device configuring the radio resource control parameters for the terminal during the connection recovery process, and thus it is helpful to complete the connection recovery as soon as possible.
  • FIG5 can be implemented independently or based on any of the above embodiments. For example, based on the embodiment shown in FIG1, the following steps can be followed:
  • connection is restored through the cell that meets the evaluation condition.
  • FIG6 is a schematic flow chart of another method for handling a cell change failure according to an embodiment of the present disclosure. As shown in FIG6 , performing connection recovery includes:
  • step S601 a cell indicated by a network device for connection recovery is determined
  • step S602 connection recovery is performed through the cell used for connection recovery.
  • the network device may indicate a cell for connection recovery to the terminal, so that when the terminal performs connection recovery after at least one cell change fails, it is not necessary to select a cell, and the terminal can directly perform connection recovery through the cell for connection recovery indicated by the network device.
  • the network device may indicate a cell for connection recovery in at least one cell change command sent to the terminal.
  • the performing connection recovery further includes:
  • connection recovery through the cell used for connection recovery fails, cell selection is performed, and radio resource control reconstruction is performed through the selected cell to restore the connection.
  • the terminal performs connection recovery through the cell for connection recovery indicated by the network device, and needs to access the source cell. For example, at least one cell change failure message is first sent to the cell for connection recovery, and when the downlink transmission of the cell for connection recovery is received, it can be determined that the access to the cell for connection recovery is successful. If the downlink transmission of the cell for connection recovery is not received, for example, the downlink transmission of the cell for connection recovery is not received within the fifth preset time range from sending at least one cell change failure message to the cell for connection recovery, it can be determined that the access to the cell for connection recovery has failed, then the terminal can select a cell and perform radio resource control reconstruction through the selected cell to restore the connection.
  • radio resource control reconstruction in this embodiment may be different from the radio resource control reconstruction in the related art.
  • performing radio resource control reestablishment through the selected cell to restore the connection includes:
  • connection recovery is performed on the candidate cell according to the radio resource control parameters.
  • the candidate cell may be selected by the network device for the terminal based on the measurement result after the terminal performs measurement and reports the measurement result through L3 before making at least one cell change, and the network device configures the radio resource control parameters of the candidate cell for the terminal.
  • the terminal When the terminal selects a candidate cell during cell selection, it can perform connection recovery on the candidate cell according to the pre-configured wireless resource control parameters of the candidate cell.
  • the network device since the wireless resource control parameters of the candidate cell have been configured to the terminal by the network device before the terminal makes at least one cell selection, in this embodiment, the network device only needs to configure the terminal with wireless resource control parameters other than the pre-configured wireless resource control parameters.
  • performing radio resource control reestablishment through the selected cell to restore the connection includes:
  • connection recovery is performed on the selected cell according to the radio resource control parameters configured for the source cell.
  • the network device may instruct the terminal to perform connection recovery on the selected cell according to the radio resource control parameters configured for the source cell. Since the radio resource control parameters of the source cell have been configured by the network device to the terminal before the terminal performs at least one cell selection, the network device in this embodiment only needs to configure the radio resource control parameters other than the pre-configured radio resource control parameters for the terminal. Accordingly, it is helpful to simplify the process of the network device configuring the radio resource control parameters for the terminal during the connection recovery process, and thus it is helpful to complete the connection recovery as soon as possible.
  • FIG6 can be implemented independently or based on any of the above embodiments.
  • the embodiment can be implemented according to the following steps:
  • connection recovery is performed through the cell used for connection recovery.
  • FIG7 is a schematic flow chart of another method for handling a cell change failure according to an embodiment of the present disclosure. As shown in FIG7 , the connection recovery includes:
  • step S701 a cell is selected, and radio resource control is reestablished through the selected cell to restore the connection.
  • the terminal when the terminal performs connection recovery after at least one cell change fails, the terminal may select a cell and perform radio resource control reconstruction through the selected cell to restore the connection.
  • radio resource control reconstruction in the embodiments of the present disclosure is different from the radio resource control reconstruction in the related art, which is described below through several embodiments.
  • performing radio resource control reestablishment through the selected cell to restore the connection includes:
  • connection recovery is performed on the candidate cell according to the radio resource control parameters.
  • the candidate cell may be selected by the network device for the terminal based on the measurement result after the terminal performs measurement and reports the measurement result through L3 before making at least one cell change, and the network device configures the radio resource control parameters of the candidate cell for the terminal.
  • the terminal When the terminal selects a candidate cell during cell selection, it can perform connection recovery on the candidate cell according to the pre-configured radio resource control parameters of the candidate cell.
  • the network device in this embodiment only needs to configure the radio resource control parameters other than the pre-configured radio resource control parameters to the terminal. Accordingly, it is helpful to simplify the process of the network device configuring the radio resource control parameters for the terminal during the connection recovery process, and thus it is helpful to complete the connection recovery as soon as possible.
  • the number of attempts n that the terminal makes to restore the connection through the candidate cell may be limited, for example, the number of attempts may be determined based on a protocol agreement or may be indicated by a network device. If the terminal fails to restore the connection through the candidate cell, it may restore the connection through the candidate cell again until the number of attempts n is reached, and then restore the connection through other means, so as to avoid too many attempts resulting in slow connection recovery and waste of resources.
  • performing radio resource control reestablishment through the selected cell to restore the connection includes:
  • connection recovery is performed on the selected cell according to the radio resource control parameters configured for the source cell.
  • the network device may instruct the terminal to perform connection recovery on the selected cell according to the radio resource control parameters configured for the source cell. Since the radio resource control parameters of the source cell have been configured by the network device to the terminal before the terminal performs at least one cell selection, the network device in this embodiment only needs to configure the radio resource control parameters other than the pre-configured radio resource control parameters for the terminal. Accordingly, it is helpful to simplify the process of the network device configuring the radio resource control parameters for the terminal during the connection recovery process, and thus it is helpful to complete the connection recovery as soon as possible.
  • FIG7 can be implemented independently or based on any of the above embodiments.
  • the embodiment can be implemented according to the following steps:
  • Fig. 8 is a schematic flow chart of a method for handling a cell change failure according to an embodiment of the present disclosure.
  • the method for handling a cell change failure shown in this embodiment can be executed by a network device, and the network device can communicate with a terminal, and the network device includes but is not limited to a base station in a communication system such as a 4G base station, a 5G base station, and a 6G base station, and the terminal includes but is not limited to a mobile phone, a tablet computer, a wearable device, a sensor, an Internet of Things device, and other communication devices.
  • the change failure processing method may include the following steps:
  • step S801 when the terminal fails to change at least one cell, connection recovery is performed with the terminal.
  • At least one cell change is different from the cell handover (handover) in the related art.
  • the measurement operation of the cell during the cell switching process is performed at L3 (layer 3), and operations such as cell selection/reselection need to be performed, and the cell switching process needs to be implemented based on RRC signaling.
  • the measurement operation of at least one cell is performed at L1 (layer 1), and operations such as cell selection/cell reselection may not be performed, and may not be implemented based on RRC signaling.
  • At least one cell may be regarded as a cell set, and the cell set includes one or more cells.
  • the cell set includes multiple cells, each of the multiple cells may be of the same type, or at least two of the multiple cells may be of different types. This embodiment may be applicable to any subsequent embodiment involving at least one cell.
  • the at least one cell includes at least one of the following:
  • Pcell Primary cell
  • the terminal can communicate in at least one cell.
  • the terminal in a dual-connection DC scenario, the terminal can communicate with a network device in at least one cell and a secondary cell group SCG.
  • the terminal in a carrier aggregation (CA) scenario, the terminal can communicate in a primary cell and at least one secondary cell.
  • CA carrier aggregation
  • the terminal in a non-carrier aggregation scenario, the terminal can communicate in the primary cell.
  • the primary cell group may include a primary cell and at least one secondary cell; the secondary cell group may include a primary secondary cell (PScell) and at least one secondary cell.
  • PScell primary secondary cell
  • composition of the primary cell group and the secondary cell group is not limited to the above, and can be specifically set as needed.
  • the terminal may determine that at least one cell change is required.
  • the terminal may determine that at least one cell change is required. The following describes several examples of such events:
  • the terminal when the terminal receives a switch command sent by the first cell in the at least one cell, it can be determined that the first cell requires the terminal to perform at least one cell change.
  • the first cell can be one or more cells in at least one cell where the terminal is located before performing at least one cell change.
  • the at least one cell before the change is an MCG
  • the first cell can be a primary cell (Pcell) in the MCG or one or more secondary cells (Scell) in the MCG.
  • the terminal after receiving the change command sent by the first cell in the at least one cell, the terminal sends feedback of the change command to the first cell, and it can be determined that the terminal agrees to perform at least one cell change command, so at least one cell change is required.
  • the feedback can be sent in the form of a hybrid automatic repeat request HARQ, or in the form of a media access control layer control element MAC CE, which can be set as needed.
  • the terminal determines that the condition for triggering the at least one cell change is met, it can be determined that the terminal itself needs to make at least one cell change, for example, triggered by the user of the terminal, so that it can be determined that at least one cell change is needed.
  • the terminal when the terminal releases the primary cell in the at least one cell (including but not limited to releasing the MAC layer parameters of the primary cell), it can be determined that at least one cell change is required. Since the terminal communicates on at least one cell, mainly on the primary cell in the at least one cell, when the terminal releases the primary cell, it will not communicate on the primary cell, so it can be determined that at least one cell change is required.
  • the events that cause the terminal to determine that at least one cell change is required are not limited to the above-mentioned ones, and can be specifically set as needed.
  • the terminal when the terminal determines that at least one cell change is required, the terminal may perform at least one cell change.
  • At least one cell includes an MCG
  • at least one cell change is performed, and the MCG may be changed, for example, all cells (primary cells and secondary cells) in the MCG may be changed, or some cells in the MCG may be changed.
  • At least one cell when at least one cell includes a primary cell, at least one cell change may be performed to change the primary cell.
  • At least one cell includes a primary cell and at least one secondary cell
  • at least one cell change is performed, and the primary cell and the at least one secondary cell may be changed.
  • At least one cell change failure may occur.
  • the judgment method of at least one cell change failure can be implemented with a timer. The relevant implementation method has been described in the terminal side embodiment above, so it will not be repeated here.
  • the network device when it determines that at least one cell change of the terminal has failed, it can restore the connection with the terminal, such as restoring the connection between the terminal and the cell, thereby ensuring that the terminal can continue to maintain communication without causing communication interruption due to the lack of connection to the cell due to at least one cell change failure.
  • FIG9 is a schematic flow chart of another method for handling a cell change failure according to an embodiment of the present disclosure.
  • the connection recovery with the terminal includes:
  • step S901 when a secondary cell group is configured for the terminal, at least one cell change failure information sent by the terminal is received through the secondary cell group;
  • step S902 the terminal is controlled to perform connection recovery through the secondary cell group.
  • the network device when the network device configures a secondary cell group for the terminal and the secondary cell group is in an available state, if the network device configures the terminal so that the terminal can send at least one cell change failure message to the secondary cell group, or the protocol stipulates that the terminal can send at least one cell change failure message to the secondary cell group, then the terminal can send at least one cell change failure message to the secondary cell group, and then after the base station receives at least one cell change failure message through the secondary cell group, it can control the terminal to restore the connection through the secondary cell group.
  • the process of the network device controlling the terminal to restore the connection through the secondary cell group is specifically based on the implementation of the network device, and the present disclosure does not limit it.
  • the network device can control the terminal to access the secondary cell group as at least one cell to restore the connection, for example, the network device can specify a cell group as at least one cell access for the terminal through the secondary cell group to restore the connection.
  • restoring the connection with the terminal further includes:
  • radio resource control is reestablished through the cell selected by the terminal to restore the connection.
  • the terminal when no secondary cell group is configured for the terminal or the secondary cell group configured for the terminal is unavailable, the terminal can select a cell, and the network device can reestablish radio resource control with the terminal through the cell selected by the terminal to restore the connection.
  • radio resource control reconstruction in this embodiment may be different from the radio resource control reconstruction in the related art.
  • reestablishing radio resource control through the cell selected by the terminal includes:
  • connection recovery is performed with the terminal on the candidate cell according to the radio resource control parameters.
  • the candidate cell may be selected by the network device for the terminal based on the measurement result after the terminal performs measurement and reports the measurement result through L3 before making at least one cell change, and the network device configures the radio resource control parameters of the candidate cell for the terminal.
  • the network device When the terminal performs cell selection and selects a candidate cell, the network device restores the connection with the terminal on the candidate cell according to the pre-configured wireless resource control parameters of the candidate cell.
  • the network device in this embodiment only needs to configure the terminal with wireless resource control parameters other than the pre-configured wireless resource control parameters.
  • reestablishing radio resource control through the cell selected by the terminal includes:
  • connection with the terminal is restored on the selected cell according to the radio resource control parameters configured for the source cell.
  • the network device may instruct the terminal to perform connection recovery on the selected cell according to the radio resource control parameters configured for the source cell. Since the radio resource control parameters of the source cell have been configured by the network device to the terminal before the terminal performs at least one cell selection, the network device in this embodiment only needs to configure the radio resource control parameters other than the pre-configured radio resource control parameters for the terminal. Accordingly, it is helpful to simplify the process of the network device configuring the radio resource control parameters for the terminal during the connection recovery process, and thus it is helpful to complete the connection recovery as soon as possible.
  • FIG9 can be implemented independently or based on any of the above embodiments. For example, based on the embodiment shown in FIG8, the following steps can be followed:
  • the terminal fails to perform at least one cell change, and in a case where a secondary cell group is configured for the terminal, receiving at least one cell change failure information sent by the terminal through the secondary cell group;
  • the terminal is controlled to perform connection recovery through the secondary cell group.
  • FIG10 is a schematic flow chart of another method for handling a cell change failure according to an embodiment of the present disclosure.
  • the connection recovery with the terminal includes:
  • step S1001 the connection between the source cell and the terminal is maintained, and the connection between the source cell and the terminal is restored.
  • the source cell may be one or more cells in at least one cell where the terminal is located before performing at least one cell change.
  • the source cell when at least one cell includes an MCG, the source cell may be the MCG in which at least one cell change is made, such as a primary cell and a secondary cell in the MCG, or the source cell may be the primary cell in the MCG in which at least one cell change is made, or the source cell may be the secondary cell in the MCG in which at least one cell change is made.
  • the source cell may be the primary cell before at least one cell change is performed.
  • the source cell when at least one cell includes a main cell and at least one secondary cell, the source cell may be the main cell and the secondary cell of the main cell and at least one secondary cell before at least one cell change is made, or the source cell may be the main cell of the main cell and at least one secondary cell before at least one cell change is made, or the source cell may be the secondary cell of the main cell and at least one secondary cell before at least one cell change is made.
  • the target cell may send feedback to the source cell to notify the source cell that the terminal has successfully changed to the target cell.
  • the network device may maintain the connection between the source cell and the terminal, so that in the event that at least one cell of the terminal fails to change, the connection between the source cell and the terminal can be directly restored; the network device will release the connection between the source cell and the terminal only after receiving the feedback from the target cell.
  • the terminal can recover the connection through the source cell. During this process, there is no need to reestablish the radio resource control, which facilitates the terminal to quickly recover the connection.
  • the restoring the connection with the terminal through the source cell includes:
  • At least one cell change failure information sent by the terminal is received through the source cell.
  • the terminal recovers the connection through the source cell and can first send at least one cell change failure information to the source cell.
  • the network device can receive at least one cell change failure information sent by the terminal through the source cell, thereby determining that the terminal has at least one cell change failure and the terminal needs to access the source cell. Then, the terminal accesses the source cell and can communicate with the source cell smoothly. During this process, there is no need to rebuild the wireless resource control.
  • restoring the connection with the terminal further includes:
  • radio resource control is reestablished through the cell selected by the terminal to restore the connection.
  • the terminal needs to access the source cell to restore the connection through the source cell. For example, at least one cell change failure message is first sent to the source cell, and when the downlink transmission of the first cell in the at least one cell is received, it can be determined that the access to the source cell is successful. If the downlink transmission of the first cell in the at least one cell is not received, for example, the downlink transmission of the first cell in the at least one cell is not received within the fourth preset time range from sending at least one cell change failure message to the source cell, it can be determined that the access to the source cell has failed, then the terminal can select a cell, and the network device can perform radio resource control reconstruction with the terminal through the cell selected by the terminal to restore the connection.
  • the first cell does not refer to a specific cell, but refers to any cell of at least one cell where the terminal is located before at least one cell change is performed.
  • radio resource control reconstruction in this embodiment may be different from the radio resource control reconstruction in the related art.
  • reestablishing radio resource control through the cell selected by the terminal includes:
  • connection recovery is performed with the terminal on the candidate cell according to the radio resource control parameters.
  • the candidate cell may be selected by the network device for the terminal based on the measurement result after the terminal performs measurement and reports the measurement result through L3 before making at least one cell change, and the network device configures the radio resource control parameters of the candidate cell for the terminal.
  • the network device When the terminal performs cell selection and selects a candidate cell, the network device restores the connection with the terminal on the candidate cell according to the pre-configured wireless resource control parameters of the candidate cell.
  • the network device in this embodiment only needs to configure the terminal with wireless resource control parameters other than the pre-configured wireless resource control parameters.
  • reestablishing radio resource control through the cell selected by the terminal includes:
  • connection with the terminal is restored on the selected cell according to the radio resource control parameters configured for the source cell.
  • the network device may instruct the terminal to perform connection recovery on the selected cell according to the radio resource control parameters configured for the source cell. Since the radio resource control parameters of the source cell have been configured by the network device to the terminal before the terminal performs at least one cell selection, the network device in this embodiment only needs to configure the radio resource control parameters other than the pre-configured radio resource control parameters for the terminal. Accordingly, it is helpful to simplify the process of the network device configuring the radio resource control parameters for the terminal during the connection recovery process, and thus it is helpful to complete the connection recovery as soon as possible.
  • FIG10 can be implemented independently or based on any of the above embodiments.
  • the embodiment can be implemented according to the following steps:
  • the terminal fails to perform at least one cell change, the connection between the source cell and the terminal is maintained, and the connection between the terminal and the source cell is restored.
  • FIG11 is a schematic flow chart of another method for handling a cell change failure according to an embodiment of the present disclosure.
  • the connection recovery with the terminal includes:
  • step S1101 the terminal evaluates a plurality of pre-determined cells and restores connection to a cell that meets an evaluation condition.
  • the terminal may predetermine multiple cells, for example, the multiple cells may be determined according to a protocol agreement, and the multiple cells may also be determined according to a cell list configured by a network device.
  • the terminal may evaluate multiple cells and determine a cell that meets the evaluation conditions, and then after at least one cell change fails, the network device may restore the connection with the terminal through the cell that meets the evaluation conditions (for example, based on radio resource control reconstruction), and the terminal does not need to perform a cell selection operation, thereby facilitating rapid completion of connection recovery.
  • the method of evaluating multiple cells can be set as needed, and the present disclosure does not limit it. For example, it can be implemented based on the relevant embodiments of the terminal side, which will not be described in detail here.
  • the predetermined multiple cells include at least one of the following:
  • the network device when the source cell meets the evaluation conditions, since the wireless resource control parameters of the source cell are known to the terminal, when the terminal restores the connection through the source cell, the network device does not need to reconfigure the wireless resource control parameters of the source cell for the terminal. Accordingly, it is helpful to simplify the process of the network device configuring the wireless resource control parameters for the terminal during the connection recovery process, which is conducive to completing the connection recovery as soon as possible.
  • the terminal when the candidate cell meets the evaluation conditions, the terminal performs connection recovery through the candidate cell.
  • the candidate cell may be selected by the network device for the terminal according to the measurement result after the terminal performs measurement and reports the measurement result through L3 before performing at least one cell change, and the network device configures the radio resource control parameters (such as physical downlink control channel resources, etc.) of the candidate cell for the terminal.
  • the radio resource control parameters such as physical downlink control channel resources, etc.
  • the reason is generally that the service quality of the source cell is relatively poor.
  • the connection is restored through the source cell, and the source cell may not be a suitable cell. If the connection is restored by radio resource control reestablishment after at least one cell change fails, it takes a long time because cell selection is required, resulting in a long connection interruption time.
  • the network device since the radio resource control parameters of the candidate cells have been configured to the terminal by the network device before the terminal performs at least one cell selection, for the candidate cells, the network device only needs to configure the terminal with radio resource control parameters other than the pre-configured radio resource control parameters. Accordingly, compared with connection recovery through the source cell, it is beneficial to perform connection recovery through a more suitable cell, and compared with connection recovery through radio resource control reconstruction, it is beneficial to simplify the process of the network device configuring radio resource control parameters for the terminal during the connection recovery process, so as to complete the connection recovery as soon as possible.
  • restoring the connection with the terminal further includes:
  • radio resource control reestablishment is performed through the cell selected by the terminal to restore the connection.
  • the terminal evaluates multiple cells, and there may be a situation where there is no cell that meets the evaluation criteria.
  • the terminal can select a cell, and the network device can perform wireless resource control reconstruction through the cell selected by the terminal to restore the connection.
  • radio resource control reconstruction in this embodiment may be different from the radio resource control reconstruction in the related art.
  • reestablishing radio resource control through the cell selected by the terminal includes:
  • connection recovery is performed with the terminal on the candidate cell according to the radio resource control parameters.
  • the candidate cell may be selected by the network device for the terminal based on the measurement result after the terminal performs measurement and reports the measurement result through L3 before making at least one cell change, and the network device configures the radio resource control parameters of the candidate cell for the terminal.
  • the network device When the terminal performs cell selection and selects a candidate cell, the network device restores the connection with the terminal on the candidate cell according to the pre-configured wireless resource control parameters of the candidate cell.
  • the network device in this embodiment only needs to configure the terminal with wireless resource control parameters other than the pre-configured wireless resource control parameters.
  • reestablishing radio resource control through the cell selected by the terminal includes:
  • connection with the terminal is restored on the selected cell according to the radio resource control parameters configured for the source cell.
  • the network device may instruct the terminal to perform connection recovery on the selected cell according to the radio resource control parameters configured for the source cell. Since the radio resource control parameters of the source cell have been configured by the network device to the terminal before the terminal performs at least one cell selection, the network device in this embodiment only needs to configure the radio resource control parameters other than the pre-configured radio resource control parameters for the terminal. Accordingly, it is helpful to simplify the process of the network device configuring the radio resource control parameters for the terminal during the connection recovery process, and thus it is helpful to complete the connection recovery as soon as possible.
  • FIG11 can be implemented independently or based on any of the above embodiments.
  • the embodiment can be implemented according to the following steps:
  • the terminal evaluates a plurality of predetermined cells and determines a cell that meets the evaluation conditions to perform connection recovery.
  • FIG12 is a schematic flow chart of another method for handling a cell change failure according to an embodiment of the present disclosure. As shown in FIG12 , the connection recovery with the terminal includes:
  • step S1201 at least one cell change command is sent to the terminal, where the command is used to indicate a cell for connection recovery;
  • step S1202 the connection is restored with the terminal through the cell used for connection restoration.
  • the network device may indicate to the terminal a cell for connection recovery, so that when the terminal performs connection recovery after at least one cell change fails, there is no need to perform cell selection, and the network device may perform connection recovery with the terminal through the cell for connection recovery indicated to the terminal.
  • the network device may indicate the cell for connection recovery in the at least one cell change command sent to the terminal.
  • restoring the connection with the terminal further includes:
  • radio resource control is reestablished through the cell selected by the terminal to recover the connection.
  • the terminal performs connection recovery through the cell for connection recovery indicated by the network device, and needs to access the source cell. For example, at least one cell change failure message is first sent to the cell for connection recovery, and when the downlink transmission of the cell for connection recovery is received, it can be determined that the access to the cell for connection recovery is successful. If the downlink transmission of the cell for connection recovery is not received, for example, the downlink transmission of the cell for connection recovery is not received within the fifth preset time range starting from sending at least one cell change failure message to the cell for connection recovery, it can be determined that the access to the cell for connection recovery has failed, then the terminal can select a cell, and the network device can perform radio resource control reconstruction with the terminal through the cell selected by the terminal to restore the connection.
  • radio resource control reconstruction in this embodiment may be different from the radio resource control reconstruction in the related art.
  • reestablishing radio resource control through the cell selected by the terminal includes:
  • connection recovery is performed with the terminal on the candidate cell according to the radio resource control parameters.
  • the candidate cell may be selected by the network device for the terminal based on the measurement result after the terminal performs measurement and reports the measurement result through L3 before making at least one cell change, and the network device configures the radio resource control parameters of the candidate cell for the terminal.
  • the network device When the terminal performs cell selection and selects a candidate cell, the network device restores the connection with the terminal on the candidate cell according to the pre-configured wireless resource control parameters of the candidate cell.
  • the network device in this embodiment only needs to configure the terminal with wireless resource control parameters other than the pre-configured wireless resource control parameters.
  • reestablishing radio resource control through the cell selected by the terminal includes:
  • connection with the terminal is restored on the selected cell according to the radio resource control parameters configured for the source cell.
  • the network device may instruct the terminal to perform connection recovery on the selected cell according to the radio resource control parameters configured for the source cell. Since the radio resource control parameters of the source cell have been configured by the network device to the terminal before the terminal performs at least one cell selection, the network device in this embodiment only needs to configure the radio resource control parameters other than the pre-configured radio resource control parameters for the terminal. Accordingly, it is helpful to simplify the process of the network device configuring the radio resource control parameters for the terminal during the connection recovery process, and thus it is helpful to complete the connection recovery as soon as possible.
  • FIG12 can be implemented independently or based on any of the above embodiments.
  • the embodiment can be implemented according to the following steps:
  • the terminal fails to perform at least one cell change, sending at least one cell change command to the terminal, where the command is used to indicate a cell for connection recovery;
  • connection is restored with the terminal through the cell used for connection restoration.
  • FIG13 is a schematic flow chart of another method for handling a cell change failure according to an embodiment of the present disclosure.
  • the connection recovery with the terminal includes:
  • step S130 radio resource control is reestablished through the cell selected by the terminal to restore the connection.
  • the network device may reestablish radio resource control with the terminal through the terminal cell selection to restore the connection.
  • the network device When the terminal performs cell selection and selects a candidate cell, the network device performs connection recovery with the terminal on the candidate cell according to the pre-configured radio resource control parameters of the candidate cell.
  • the network device in this embodiment only needs to configure the radio resource control parameters other than the pre-configured radio resource control parameters to the terminal. Accordingly, it is helpful to simplify the process of the network device configuring the radio resource control parameters for the terminal during the connection recovery process, and thus it is helpful to complete the connection recovery as soon as possible.
  • reestablishing radio resource control through the cell selected by the terminal includes:
  • connection with the terminal is restored on the selected cell according to the radio resource control parameters configured for the source cell.
  • the network device may instruct the terminal to perform connection recovery on the selected cell according to the radio resource control parameters configured for the source cell. Since the radio resource control parameters of the source cell have been configured by the network device to the terminal before the terminal performs at least one cell selection, the network device in this embodiment only needs to configure the radio resource control parameters other than the pre-configured radio resource control parameters for the terminal. Accordingly, it is helpful to simplify the process of the network device configuring the radio resource control parameters for the terminal during the connection recovery process, and thus it is helpful to complete the connection recovery as soon as possible.
  • FIG13 can be implemented independently or based on any of the above embodiments.
  • the embodiment can be implemented according to the following steps:
  • radio resource control is reestablished through the cell selected by the terminal to restore the connection.
  • the present disclosure also provides an embodiment of an apparatus for processing a cell change failure.
  • FIG14 is a schematic block diagram of a cell change failure processing device according to an embodiment of the present disclosure.
  • the cell change failure processing device shown in this embodiment may be a terminal, or a device composed of modules in a terminal, and the terminal includes but is not limited to a mobile phone, a tablet computer, a wearable device, a sensor, an Internet of Things device and other communication devices.
  • the terminal may communicate with a network device, and the network device includes but is not limited to a network device in a 4G, 5G, 6G and other communication systems, such as a base station, a core network and the like.
  • the cell change failure processing device includes:
  • the processing module 1401 is configured to determine that at least one cell change fails
  • the connection module 1402 is configured to perform connection recovery.
  • the processing module is configured to determine that at least one cell change fails when a timer associated with at least one cell change times out.
  • the event that triggers the timer to start timing includes at least one of the following: receiving a change command sent by the first cell among the at least one cell; sending feedback of the change command to the first cell; determining that the conditions for triggering the change of the at least one cell are met; and releasing the main cell among the at least one cell.
  • the event that triggers the timer to end timing includes: random access initiated to the target cell is successful.
  • the event that triggers the end of the timer includes at least one of the following: receiving a downlink transmission sent by the target cell; receiving downlink control information sent by the target cell for scheduling a new transmission; receiving feedback information indicating successful access.
  • the feedback information includes at least one of the following: radio resource control layer signaling; medium access control layer signaling; physical layer signaling.
  • connection module is configured to, when a secondary cell group exists, send at least one cell change failure information to the secondary cell group; and perform connection recovery according to the control of the secondary cell group.
  • connection module is further configured to perform cell selection when no secondary cell group exists, and perform radio resource control reconstruction through the selected cell to restore the connection.
  • connection module is configured to perform connection recovery through a source cell.
  • connection module is configured to send at least one cell change failure information to the source cell; and access the source cell.
  • connection module is further configured to perform cell selection in case of failure to access the source cell, and perform radio resource control reconstruction through the selected cell to restore the connection.
  • connection module is configured to determine a cell indicated by the network device for connection recovery; and perform connection recovery through the cell for connection recovery.
  • the connection module 1501 is configured to restore the connection with the terminal when the terminal fails to change at least one cell.
  • connection module is further configured to perform radio resource control reconstruction through a cell selected by the terminal to restore the connection when the terminal fails to access the source cell.
  • the device also includes: a sending module, configured to send at least one cell change command to the terminal, the command being used to indicate a cell for connection recovery; wherein the connection module is configured to restore connection with the terminal through the cell for connection recovery.
  • connection module is further configured to perform radio resource control reconstruction through the cell selected by the terminal to restore the connection when the connection restoration with the terminal through the cell used for connection restoration fails.
  • connection module is configured to restore the connection with the terminal on the candidate cell according to the radio resource control parameters when the cell selected by the terminal is a candidate cell pre-configured with radio resource control parameters.
  • a timer-based cell switch failure recovery process is introduced.
  • a new timer may be defined.
  • the start time of the timer may include at least one of the following four situations:
  • the timer ends:
  • the timer can end in one of the following three situations:
  • Case 1 When the DL transmission of the target cell is received for the first time, specifically, the PDCCH transmission scrambled with the user's C-RNTI is received;
  • Case 2 The first reception of a DCI scheduling a new uplink or downlink transmission, scrambled by the user's C-RNTI;
  • Case 3 Explicit network feedback information is received, which can be a specific MAC CE or RRC message. If MAC CE is used, there are two formats. Format 1: define a new MAC CE; Format 2: reuse the Contention resolution MAC CE, but set the value of the MAC CE to a predefined value such as all 1s or 0s.
  • Cell switch failure recovery can be implemented based on at least one of the following methods.
  • method 1 if the terminal has an available SCG, and the network configuration or protocol stipulates that the terminal reports MCG failure to the SCG, then the SCG controls the connection recovery. Furthermore, if the MCG fails and the SCG is also unavailable, the following connection recovery (method 2) is triggered.
  • the UE performs cell selection and performs RRC reestablishment through the selected cell to restore the connection, which mainly includes the following two situations:
  • Case 1 If the selected cell is a cell in the candidate configuration, the connection is recovered through the candidate configuration, and the candidate configuration is used n times in the failure process.
  • Case 2 During the RRC reconstruction process, the network can instruct whether to perform link recovery through the configuration of the cell in the source MCG before the switch.
  • method 3 skipping the cell selection process and directly performing connection recovery through the source cell:
  • the user reports the failure to the source cell and directly accesses the source cell without performing RRC reestablishment.
  • mode 4 because the reason for the handover is that the service quality of the source cell may be relatively poor, the source cell in mode 3 may not be a suitable cell. In mode 2, cell selection is required after the failure, which will result in a long interruption time. Therefore, it is considered to select the restored cell in advance, and once a failure occurs, directly use the selected cell to perform RRC reconstruction and restore the connection.
  • a cell list is configured for the user, which by default is the candidate cells and serving cells.
  • the cells in the list are evaluated, and if they meet certain conditions, the corresponding cells are used as possible recovery cells.
  • the cell's beam average value Q is used to represent the channel condition of the cell. If Q is greater than a certain threshold value T1, it will be used as an alternative recovery cell. If a cell that has been used as an alternative recovery cell does not meet the conditions in a certain measurement, it will be removed from the alternative recovery cell; or, it is stipulated that the Q of a cell must be greater than the threshold value in N consecutive evaluations before it can be used as an alternative recovery cell. If the Q of the cell is less than a certain threshold value T2 after M consecutive evaluations, it will be removed.
  • an access message is sent to the cell by reserving resources
  • the user selects a cell to recover.
  • mode 5 multiple cells are indicated in the cell switch command, one as the target cell and the other as the candidate cell for recovery. If failure occurs, the connection is recovered through the cell. If recovery fails, the cell selection is performed again and RRC is reestablished.
  • the relevant parts refer to the partial description of the method embodiment.
  • the device embodiment described above is only schematic, wherein the modules described as separate components may or may not be physically separated, and the components displayed as modules may or may not be physical modules, that is, they may be located in one place, or they may be distributed on multiple network modules. Some or all of the modules may be selected according to actual needs to achieve the purpose of the scheme of this embodiment. Those of ordinary skill in the art can understand and implement it without paying creative labor.
  • An embodiment of the present disclosure also proposes a cell change failure processing system, including a terminal and a network device, wherein the terminal is configured to implement the cell change failure processing method executed by the terminal as described in any of the above embodiments, and the network device is configured to implement the cell change failure processing method executed by the network device as described in any of the above embodiments.
  • An embodiment of the present disclosure further proposes a communication device, comprising: a processor; a memory for storing a computer program; wherein, when the computer program is executed by the processor, the cell change failure processing method executed by the terminal as described in any of the above embodiments is implemented.
  • An embodiment of the present disclosure further proposes a communication device, comprising: a processor; a memory for storing a computer program; wherein, when the computer program is executed by the processor, the cell change failure processing method executed by the network device as described in any of the above embodiments is implemented.
  • An embodiment of the present disclosure further proposes a computer-readable storage medium for storing a computer program.
  • the computer program is executed by a processor, the method for handling a cell change failure performed by a terminal as described in any of the above embodiments is implemented.
  • An embodiment of the present disclosure further provides a computer-readable storage medium for storing a computer program.
  • the computer program is executed by a processor, the method for handling a cell change failure performed by a network device as described in any of the above embodiments is implemented.
  • FIG. 16 is a schematic block diagram of an apparatus 1600 for handling a cell change failure according to an embodiment of the present disclosure.
  • the apparatus 1600 may be provided as a base station.
  • the apparatus 1600 includes a processing component 1622, a wireless transmission/reception component 1624, an antenna component 1626, and a signal processing part specific to a wireless interface, and the processing component 1622 may further include one or more processors.
  • One of the processors in the processing component 1622 may be configured to implement the cell change failure handling method performed by a network device as described in any of the above embodiments.
  • the apparatus 1700 may be a mobile phone, a computer, a digital broadcast terminal, a messaging device, a game console, a tablet device, a medical device, a fitness device, a personal digital assistant, etc.
  • device 1700 may include one or more of the following components: a processing component 1702 , a memory 1704 , a power component 1706 , a multimedia component 1708 , an audio component 1710 , an input/output (I/O) interface 1712 , a sensor component 1714 , and a communication component 1716 .
  • a processing component 1702 may include one or more of the following components: a processing component 1702 , a memory 1704 , a power component 1706 , a multimedia component 1708 , an audio component 1710 , an input/output (I/O) interface 1712 , a sensor component 1714 , and a communication component 1716 .
  • a processing component 1702 may include one or more of the following components: a processing component 1702 , a memory 1704 , a power component 1706 , a multimedia component 1708 , an audio component 1710 , an input/output (I/O) interface 1712 , a sensor component 1714 , and a communication
  • the processing component 1702 generally controls the overall operation of the device 1700, such as operations associated with display, phone calls, data communications, camera operations, and recording operations.
  • the processing component 1702 may include one or more processors 1720 to execute instructions to complete all or part of the steps of the cell change failure processing method performed by the terminal.
  • the processing component 1702 may include one or more modules to facilitate the interaction between the processing component 1702 and other components.
  • the processing component 1702 may include a multimedia module to facilitate the interaction between the multimedia component 1708 and the processing component 1702.
  • the memory 1704 is configured to store various types of data to support operations on the device 1700. Examples of such data include instructions for any application or method operating on the device 1700, contact data, phone book data, messages, pictures, videos, etc.
  • the memory 1704 can be implemented by any type of volatile or non-volatile storage device or a combination thereof, such as static random access memory (SRAM), electrically erasable programmable read-only memory (EEPROM), erasable programmable read-only memory (EPROM), programmable read-only memory (PROM), read-only memory (ROM), magnetic memory, flash memory, magnetic disk, or optical disk.
  • SRAM static random access memory
  • EEPROM electrically erasable programmable read-only memory
  • EPROM erasable programmable read-only memory
  • PROM programmable read-only memory
  • ROM read-only memory
  • magnetic memory flash memory
  • flash memory magnetic disk, or optical disk.
  • the power supply component 1706 provides power to the various components of the device 1700.
  • the power supply component 1706 may include a power management system, one or more power supplies, and other components associated with generating, managing, and distributing power to the device 1700.
  • the multimedia component 1708 includes a screen that provides an output interface between the device 1700 and the user.
  • the screen may include a liquid crystal display (LCD) and a touch panel (TP). If the screen includes a touch panel, the screen may be implemented as a touch screen to receive input signals from the user.
  • the touch panel includes one or more touch sensors to sense touch, slide, and gestures on the touch panel. The touch sensor may not only sense the boundaries of the touch or slide action, but also detect the duration and pressure associated with the touch or slide operation.
  • the multimedia component 1708 includes a front camera and/or a rear camera. When the device 1700 is in an operating mode, such as a shooting mode or a video mode, the front camera and/or the rear camera may receive external multimedia data. Each front camera and rear camera may be a fixed optical lens system or have a focal length and optical zoom capability.
  • the audio component 1710 is configured to output and/or input audio signals.
  • the audio component 1710 includes a microphone (MIC), and when the device 1700 is in an operating mode, such as a call mode, a recording mode, and a speech recognition mode, the microphone is configured to receive an external audio signal.
  • the received audio signal can be further stored in the memory 1704 or sent via the communication component 1716.
  • the audio component 1710 also includes a speaker for outputting audio signals.
  • I/O interface 1712 provides an interface between processing component 1702 and peripheral interface modules, such as keyboards, click wheels, buttons, etc. These buttons may include, but are not limited to, a home button, a volume button, a start button, and a lock button.
  • the sensor assembly 1714 includes one or more sensors for providing various aspects of the status assessment of the device 1700.
  • the sensor assembly 1714 can detect the open/closed state of the device 1700, the relative positioning of components, such as the display and keypad of the device 1700, the sensor assembly 1714 can also detect the position change of the device 1700 or a component of the device 1700, the presence or absence of user contact with the device 1700, the orientation or acceleration/deceleration of the device 1700, and the temperature change of the device 1700.
  • the sensor assembly 1714 can include a proximity sensor configured to detect the presence of a nearby object without any physical contact.
  • the sensor assembly 1714 can also include an optical sensor, such as a CMOS or CCD image sensor, for use in imaging applications.
  • the sensor assembly 1714 can also include an acceleration sensor, a gyroscope sensor, a magnetic sensor, a pressure sensor, or a temperature sensor.
  • the communication component 1716 is configured to facilitate wired or wireless communication between the device 1700 and other devices.
  • the device 1700 can access a wireless network based on a communication standard, such as WiFi, 2G, 3G, 4G LTE, 5G NR, or a combination thereof.
  • the communication component 1716 receives a broadcast signal or broadcast-related information from an external broadcast management system via a broadcast channel.
  • the communication component 1716 also includes a near field communication (NFC) module to facilitate short-range communication.
  • the NFC module can be implemented based on radio frequency identification (RFID) technology, infrared data association (IrDA) technology, ultra-wideband (UWB) technology, Bluetooth (BT) technology, and other technologies.
  • RFID radio frequency identification
  • IrDA infrared data association
  • UWB ultra-wideband
  • Bluetooth Bluetooth
  • apparatus 1700 may be implemented by one or more application-specific integrated circuits (ASICs), digital signal processors (DSPs), digital signal processing devices (DSPDs), programmable logic devices (PLDs), field programmable gate arrays (FPGAs), controllers, microcontrollers, microprocessors or other electronic components to execute the above-mentioned cell change failure processing method executed by the terminal.
  • ASICs application-specific integrated circuits
  • DSPs digital signal processors
  • DSPDs digital signal processing devices
  • PLDs programmable logic devices
  • FPGAs field programmable gate arrays
  • controllers microcontrollers, microprocessors or other electronic components to execute the above-mentioned cell change failure processing method executed by the terminal.
  • a non-transitory computer-readable storage medium including instructions is also provided, such as a memory 1704 including instructions, and the instructions can be executed by the processor 1720 of the device 1700 to complete the cell change failure processing method performed by the terminal.
  • the non-transitory computer-readable storage medium can be a ROM, a random access memory (RAM), a CD-ROM, a magnetic tape, a floppy disk, an optical data storage device, etc.

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Abstract

本公开涉及小区变更失败处理方法、装置、通信装置和存储介质，其中，所述小区变更失败处理方法包括：确定至少一个小区变更失败；进行连接恢复。根据本公开，终端在确定至少一个小区变更失败的情况下，可以进行连接恢复，恢复与小区之间的连接，从而确保终端能够继续保持通信，而不会因为至少一个小区变更失败而没有连接的小区导致通信中断。

Description

小区变更失败处理方法、装置、通信装置和存储介质 技术领域
本公开涉及通信技术领域，具体而言，涉及小区变更失败处理方法、小区变更失败处理装置、通信装置和计算机可读存储介质。
背景技术
在某些场景下，终端可以进行小区变更，但是由于多方面因素，小区变更操作并不能保证必定成功，会存在小区变更失败的情况。
发明内容
本实施例提出了小区变更失败处理方法、小区变更失败处理装置、通信装置和计算机可读存储介质，以解决相关技术中的技术问题。
根据本公开实施例的第一方面，提出一种小区变更失败处理方法，由终端执行，所述方法包括：确定至少一个小区变更失败；进行连接恢复。
根据本公开实施例的第二方面，提出一种小区变更失败处理方法，由网络设备执行，所述方法包括：在终端进行至少一个小区变更失败的情况下，与所述终端进行连接恢复。
根据本公开实施例的第三方面，提出一种小区变更失败处理装置，所述装置包括：处理模块，被配置为确定至少一个小区变更失败；连接模块，被配置为进行连接恢复。
根据本公开实施例的第四方面，提出一种小区变更失败处理装置，所述装置包括：连接模块，被配置为在终端进行至少一个小区变更失败的情况下，与所述终端进行连接恢复。
根据本公开实施例的第五方面，提出一种小区变更失败处理系统，包括终端、网络设备，其中所述终端被配置为实现上述由终端执行的小区变更失败处理方法，所述网络设备被配置为实现上述由网络设备执行的小区变更失败处理方法。
根据本公开实施例的第六方面，提出一种通信装置，包括：处理器；用于存储计算机程序的存储器；其中，当所述计算机程序被处理器执行时，实现上述由终端执行的小区变更失败处理方法。
根据本公开实施例的第七方面，提出一种通信装置，包括：处理器；用于存储计算机程序的存储器；其中，当所述计算机程序被处理器执行时，实现上述由网络设备执行的小区变更失败处理方法。
根据本公开实施例的第八方面，提出一种计算机可读存储介质，用于存储计算机程序，当所述计算机程序被处理器执行时，实现上述由终端执行的小区变更失败处理方法。
根据本公开实施例的第九方面，提出一种计算机可读存储介质，用于存储计算机程序，当所述计算机程序被处理器执行时，实现上述由网路设备执行的小区变更失败处理方法。
根据本公开的实施例，终端在确定至少一个小区变更失败的情况下，可以进行连接恢复，恢复与小区之间的连接，从而确保终端能够继续保持通信，而不会因为至少一个小区变更失败而没有连接的小区导致通信中断。
附图说明
为了更清楚地说明本公开实施例中的技术方案，下面将对实施例描述中所需要使用的附图作简单地介绍，显而易见地，下面描述中的附图仅仅是本公开的一些实施例，对于本领域普通技术 人员来讲，在不付出创造性劳动性的前提下，还可以根据这些附图获得其他的附图。
图1是根据本公开的实施例示出的一种小区变更失败处理方法的示意流程图。
图2是根据本公开的实施例示出的另一种小区变更失败处理方法的示意流程图。
图3是根据本公开的实施例示出的又一种小区变更失败处理方法的示意流程图。
图4是根据本公开的实施例示出的又一种小区变更失败处理方法的示意流程图。
图5是根据本公开的实施例示出的又一种小区变更失败处理方法的示意流程图。
图6是根据本公开的实施例示出的又一种小区变更失败处理方法的示意流程图。
图7是根据本公开的实施例示出的又一种小区变更失败处理方法的示意流程图。
图8是根据本公开的实施例示出的一种小区变更失败处理方法的示意流程图。
图9是根据本公开的实施例示出的另一种小区变更失败处理方法的示意流程图。
图10是根据本公开的实施例示出的又一种小区变更失败处理方法的示意流程图。
图11是根据本公开的实施例示出的又一种小区变更失败处理方法的示意流程图。
图12是根据本公开的实施例示出的又一种小区变更失败处理方法的示意流程图。
图13是根据本公开的实施例示出的又一种小区变更失败处理方法的示意流程图。
图14是根据本公开的实施例示出的一种小区变更失败处理装置的示意框图。
图15是根据本公开的实施例示出的一种小区变更失败处理装置的示意框图。
图16是根据本公开的实施例示出的一种用于小区变更失败处理的装置的示意框图。
图17是根据本公开的实施例示出的一种用于小区变更失败处理的装置的示意框图。
具体实施方式
下面将结合本公开实施例中的附图，对本公开实施例中的技术方案进行清楚、完整地描述，显然，所描述的实施例仅仅是本公开一部分实施例，而不是全部的实施例。基于本公开中的实施例，本领域普通技术人员在没有做出创造性劳动前提下所获得的所有其他实施例，都属于本公开保护的范围。
在本公开实施例使用的术语是仅仅出于描述特定实施例的目的，而非旨在限制本公开实施例。在本公开实施例和所附权利要求书中所使用的单数形式的“一种”和“该”也旨在包括多数形式，除非上下文清楚地表示其他含义。还应当理解，本文中使用的术语“和/或”是指并包含一个或多个相关联的列出项目的任何或所有可能组合。
应当理解，尽管在本公开实施例可能采用术语第一、第二、第三等来描述各种信息，但这些信息不应限于这些术语。这些术语仅用来将同一类型的信息彼此区分开。例如，在不脱离本公开实施例范围的情况下，第一信息也可以被称为第二信息，类似地，第二信息也可以被称为第一信息。取决于语境，如在此所使用的词语“如果”可以被解释成为“在……时”或“当……时”或“响应于确定”。
出于简洁和便于理解的目的，本文在表征大小关系时，所使用的术语为“大于”或“小于”、“高于”或“低于”。但对于本领域技术人员来说，可以理解：术语“大于”也涵盖了“大于等于”的含义，“小于”也涵盖了“小于等于”的含义；术语“高于”涵盖了“高于等于”的含义，“低于”也涵盖了“低于等于”的含义。
图1是根据本公开的实施例示出的一种小区变更失败处理方法的示意流程图。本实施例所示的小区变更失败处理方法可以由终端执行，所述终端包括但不限于手机、平板电脑、可穿戴设备、传感器、物联网设备等通信装置。所述终端可以与网络设备通信，所述网络设备包括但不限于4G、5G、6G等通信系统中的网络设备，例如基站、核心网等。
如图1所示，所述小区变更失败处理方法可以包括以下步骤：
在步骤S101中，确定至少一个小区变更(Switch)失败；
在步骤S102中，进行连接恢复。
需要说明的是，在一个实施例中，至少一个小区变更(Switch)，与相关技术中的小区切换(handover)是不同的。
相关技术中的小区切换过程中对小区的测量操作是在L3(层3)执行的，并且需要执行小区选择/选取重选等操作，小区切换的过程需要基于RRC信令实现。而本公开实施例中的至少一个小区变更，对至少一个小区的测量操作是在L1(层1)执行的，而且可以不进行小区选择/小区重选等操作，也可以不基于RRC信令实现。
在一个实施例中，至少一个小区可以视作一个小区集合，小区集合包含一个或多个小区。其中，在小区集合包含多个小区的情况下，多个小区中的每个小区可以属于相同类型，或者，多个小区中的至少两个小区可以属于不同类型。本实施例可以适用于后续任一个涉及至少一个小区的实施例。
在一个实施例中，所述至少一个小区包括以下至少之一：
主小区组(Master Cell Group，MCG)；
主小区(Pcell)；
主小区(Pcell)和至少一个辅小区(Scell)。
在一个实施例中，终端在某些场景下，可以在至少一个小区中进行通信，例如在双连接(Dual Connectivity，DC)场景下，终端可以在主小区组和辅小区组(Secondary Cell Group，SCG)上与网络设备进行通信。在载波聚合(Carrier Aggregation，CA)场景下，终端可以在主小区和至少一个辅小区上进行通信。在非载波聚合场景下，终端可以在主小区上进行通信。
其中，主小区组可以包括主小区和至少一个辅小区；辅小区组可以包括主辅小区(PScell)和至少一个辅小区。当然，主小区组和辅小区组的构成并不限于以上情况，具体可以根据需要设置。
在某些事件发生时，终端可以确定需要进行至少一个小区变更。以下对该事件的几种情况进行示例性描述：
例如，终端在接收到所述至少一个小区中第一小区发送的变更命令(switch command)时，可以确定第一小区需要终端进行至少一个小区变更。在本实施例中，第一小区可以是终端进行至少一个小区变更前所在至少一个小区中的一个或多个小区，例如变更前所在至少一个小区为MCG，那么第一小区可以是MCG中的主小区(Pcell)、也可以是MCG中的一个或多个辅小区(Scell)。
例如，终端确定满足触发所述至少一个小区变更的条件时，那么可以确定终端自身需要进行至少一个小区变更，例如由终端的用户触发的，从而可以确定需要进行至少一个小区变更。
应当理解的是，使得终端确定需要进行至少一个小区变更的事件，并不限于上述几种，具体可以根据需要进行设置。
在一个实施例中，终端在确定需要进行至少一个小区变更时，可以进行至少一个小区变更。
例如在至少一个小区包括MCG时，进行至少一个小区变更，可以变更MCG，例如变更MCG中的所有小区(主小区和辅小区)，或者变更MCG中的部分小区。
例如在至少一个小区包括主小区时，进行至少一个小区变更，可以变更主小区。
例如在至少一个小区包括主小区和至少一个辅小区时，进行至少一个小区变更，可以变更主小区和至少一个辅小区。
在某些情况下，终端进行至少一个小区变更，会发生至少一个小区变更失败，关于至少一个小区变更失败的情况在后续实施例中进行描述，此处暂不展开。
根据本实施例，终端在确定至少一个小区变更失败的情况下，可以进行连接恢复，恢复与小区之间的连接，从而确保终端能够继续保持通信，而不会因为至少一个小区变更失败而没有连接的小区导致通信中断。
图2是根据本公开的实施例示出的另一种小区变更失败处理方法的示意流程图。如图2所示， 所述确定至少一个小区变更失败包括：
在步骤S201中，在与至少一个小区变更相关联的定时器超时时，确定至少一个小区变更失败。
在一个实施例中，终端中可以配置有在与至少一个小区变更相关联的定时器，在该定时器超时时，终端可以确定至少一个小区变更失败。其中，定时器的超时时长可以是网络设备配置的，也可以是根据协议约定确定的，当定时器开始计时后，计时时长大于或等于超时时长时，可以确定定时器超时。
需要说明的是，定时器的超时时长本质上就是一段预设时长，所以本实施例实现方式可以描述为，从确定需要进行至少一个小区变更开始，持续第一预设时长未确定至少一个小区变更成功，则确定至少一个小区变更失败。
在一个实施例中，触发所述定时器开始计时的事件包括以下至少之一：
接收到所述至少一个小区中第一小区发送的变更命令，例如在至少一个小区包括MCG的情况下，所述变更命令可以是主小区组变更命令(MCG switch command)；
向所述第一小区发送所述变更命令的反馈(feedback)；
确定满足触发所述至少一个小区变更的条件；
释放所述至少一个小区中的主小区。
需要说明的是，第一小区并非特指某个小区，而是指终端进行至少一个小区变更前所在的至少一个小区中的任一个小区。
在一个实施例中，关于接收到所述至少一个小区中第一小区发送的变更命令，确定满足触发所述至少一个小区变更的条件，这两种情况在前文实施例已描述，此处不再赘述。主要针对以下两种情况进行描述：向所述第一小区发送所述变更命令的反馈；释放所述至少一个小区中的主小区。
例如，终端在接收到所述至少一个小区中第一小区发送的变更命令后，向所述第一小区发送所述变更命令的反馈，可以确定终端同意变更命令，那么就需要进行至少一个小区变更。其中，反馈可以以混合自动重传请求(Hybrid Automatic Repeat reQuest，HARQ)的形式发送，也可以以媒体接入控制层控制元素(Media Access Control Control Element，MAC CE)的形式发送，具体可以根据需要设置。
例如，终端在释放所述至少一个小区中的主小区(包括但不限于释放了主小区的MAC层参数)时，可以确定需要进行至少一个小区变更。由于终端在至少一个小区上进行通信，主要就是在至少一个小区中的主小区上进行通信，当终端释放了主小区，就不会在主小区上通信了，所以可以确定需要进行至少一个小区变更。
在一个实施例中，终端在确定触发所述定时器开始计时的事件时，可以启动定时器。
在一个实施例中，在至少一个小区变更为基于随机接入的变更的情况下，触发所述定时器结束计时的事件包括：
向目标小区发起的随机接入成功。
在一个实施例中，目标小区可以是终端需要变更到的至少一个小区中的一个或多个小区。
例如，在至少一个小区包括MCG时，目标小区可以是需要变更到的MCG，例如MCG中的主小区和辅小区，或者，目标小区可以是需要变更到的MCG中的主小区，或者，目标小区可以是需要变更到的MCG中的辅小区。
例如，在至少一个小区包括主小区时，目标小区可以是需要变更到的主小区。
例如，在至少一个小区包括主小区和至少一个辅小区时，目标小区可以是需要变更到的主小区和至少一个辅小区中的主小区和辅小区，或者，目标小区可以是需要变更到的主小区和至少一个辅小区中的主小区，或者，目标小区可以是需要变更到的主小区和至少一个辅小区中的辅小区。
在一个实施例中，在至少一个小区变更为基于随机接入的变更的情况下，终端可以基于随机接入进行至少一个小区变更，例如向目标小区发起随机接入。其中，在随机接入为4步随机接入 的情况下，终端在接收到4步随机接入的第4条消息Msg4时，可以确定随机接入成功；在随机接入为2步随机接入的情况下，终端在接收到2步随机接入的第2条消息Msg4时，可以确定随机接入成功。
在定时器超时前，终端确定向目标小区发起的随机接入成功，则可以结束定时器的计时。在下一次确定需要进行至少一个小区变更时(例如下一次发生使得终端确定需要进行至少一个小区变更的事件，具体事件请参考前文实施例，此处不再赘述)，再重启定时器，则定时器重新开始计时。而若在定时器超时前，终端未能确定向目标小区发起的随机接入成功，那么在定时器超时时，终端可以确定至少一个小区变更失败。
需要说明的是，在本实施例中，终端进行至少一个小区变更时，变更前的源小区，和变更后的目标小区，可以是同一个基站下的小区或小区组，也可以是不同基站下的小区或小区组。
在一个实施例中，在至少一个小区变更为非基于随机接入的变更的情况下，触发所述定时器结束计时的事件包括以下至少之一：
接收到目标小区发送的下行传输；
接收到目标小区发送的用于调度新传的下行控制信息；
接收到指示接入成功的反馈信息，例如反馈信息可以以显式方式发送，也可以以隐式方式发送，以下实施例主要对显式方式进行示例性描述。
其中，目标小区是终端需要变更到的至少一个小区。
在一个实施例中，在至少一个小区变更为非基于随机接入的变更的情况下，终端进行的至少一个小区变更，可以不基于随机接入进行，例如终端可以向目标小区发送通知信息(例如MAC CE)，以通知目标小区，终端要变更到目标小区。
那么终端在某些事件下，可以确定至少一个小区变更成功，成功变更到了目标小区。以下对该事件的几种情况进行示例性描述：
例如，终端接收到目标小区发送的下行传输。具体可以是从终端向目标小区发送通知信息开始的第二预设时长范围内，终端接收到目标小区发送的下行传输。由于终端成功变更到目标小区后，目标小区才会向终端发送的下行传输，因此，终端可以在接收到目标小区发送的下行传输时确定至少一个小区变更成功。其中，所述下行传输包括但不限于物理下行控制信道(Physical Downlink Control Channel，PDCCH)，例如可以是通过所述终端的小区无线网络临时标识(Cell-Radio Network Temporary Identifier，C-RNTI)进行加扰的PDCCH。
例如，终端接收到目标小区发送的用于调度新传(可以是新的上行传输，也可以是新的下行传输)的下行控制信息(Downlink Control Information，DCI)。具体可以是从终端向目标小区发送通知信息开始的第三预设时长范围内，终端接收到目标小区发送的用于调度新传的下行控制信息。由于终端成功变更到目标小区后，目标小区才会向终端发送用于调度新传的下行控制信息，因此，终端可以在收到目标小区发送的用于调度新传的DCI时确定至少一个小区变更成功。其中，用于调度新传的DCI，可以是通过所述终端的小区无线网络临时标识C-RNTI进行加扰的DCI。
例如，终端接收到指示接入成功的反馈信息。反馈信息可以是针对通知信息的反馈，具体可以是从终端向目标小区发送通知信息开始的第四预设时长范围内，终端接收到目标小区发送的反馈信息。由于终端成功变更到目标小区后，目标小区才会向终端发送反馈信息以通知终端接入成功，因此，终端可以在接收到指示接入成功的反馈信息时，确定至少一个小区变更成功。
应当理解的是，使得终端确定需要至少一个小区变更成功的事件，并不限于上述几种，具体可以根据需要进行设置。
在一个实施例中，触发与至少一个小区变更相关联的定时器结束计时的事件，与使得终端确定需要至少一个小区变更成功的事件，可以是相同的。那么终端可以在确定至少一个小区变更成功时，控制定时器结束计时，从而计时器不会超时，终端也就不会确定至少一个小区变更失败。
在一个实施例中，所述反馈信息包括以下至少之一：
无线资源控制(Radio Resource Control，RRC)层信令；
媒体接入控制层信令，例如MAC CE；
物理层信令，例如DCI。
以反馈信息为MAC CE进行示例。为了与相关技术中的MAC CE形成区别，一个实施例中，可以定义新的MAC CE作为反馈信息；另一实施例中，可以复用竞争解决MAC CE，但是需要将MAC CE中的值全部置为预定义的值(例如0或1)。
关于图2所示实施例，可以独立实施，也可以在前文任一实施例的基础上实施。例如在图1所示实施例基础上，可以按照如下步骤实施：
在与至少一个小区变更相关联的定时器超时时，确定至少一个小区变更失败；
进行连接恢复。
相关的实施例可以参考前文描述，相关的实施例可以单独实施，也可以根据需要结合后实施，本公开并不限制。
在定时器超时的情况下，终端可以确定至少一个小区变更失败，从而可以进行连接恢复。以下通过几个实施例对进行连接恢复的方式进行示例性说明。
图3是根据本公开的实施例示出的又一种小区变更失败处理方法的示意流程图。如图3所示，所述进行连接恢复包括：
在步骤S301中，在存在辅小区组的情况下，向所述辅小区组发送至少一个小区变更失败信息；
在步骤S302中，根据所述辅小区组的控制进行连接恢复。
在一个实施例中，当存在辅小区组的情况下(终端被配置了辅小区组，且辅小区组处于可用状态)，若网络设备配置终端，使得终端可以向辅小区组发送至少一个小区变更失败信息，或者协议约定终端可以向辅小区组发送至少一个小区变更失败信息，那么终端可以向辅小区组发送至少一个小区变更失败信息，进而可以在辅小区组的控制下进行连接恢复。
其中，辅小区组控制终端进行连接恢复的过程具体依据辅小区组的实现，本公开并不限制。例如辅小区组可以控制终端将辅小区组作为至少一个小区接入以恢复连接，例如辅小区组可以为终端指定一个小区组作为至少一个小区接入以恢复连接。
在一个实施例中，所述进行连接恢复还包括：
在不存在辅小区组的情况下，进行小区选择，通过选择的小区进行无线资源控制重建以恢复连接。
在一个实施例中，在不存在辅小区组的情况下，例如网络设备没有为终端配置辅小区组，或者为终端配置了辅小区组，但是辅小区组处于不可用状态，那么终端可以进行小区选择，然后通过选择的小区进行无线资源控制重建以恢复连接。
需要说明的是，本实施例中的无线资源控制重建，与相关技术中的无线资源控制重建可以不同。
在一个实施例中，所述通过选择的小区进行无线资源控制重建以恢复连接包括：
在选择的小区为预先预配置了无线资源控制参数的候选小区的情况下，根据所述无线资源控制参数在所述候选小区上进行连接恢复。
在一个实施例中，候选小区可以是终端在进行至少一个小区变更之前，通过L3进行测量和上报测量结果，网络设备根据测量结果为终端选定的，并且网络设备为终端配置了候选小区的无线资源控制参数。
终端在小区选择时，选择了候选小区的情况下，可以根据预先配置的候选小区的无线资源控制参数在候选小区上进行连接恢复，相对于相关技术中的无线资源控制重建过程，由于候选小区的无线资源控制参数在终端进行至少一个小区选择之前，已经由网络设备配置给终端了，所以本实施例中网络设备只需给终端配置预先预配置的无线资源控制参数以外的无线资源控制参数。
在一个实施例中，所述通过选择的小区进行无线资源控制重建以恢复连接包括：
基于网络设备的指示，根据配置给源小区的无线资源控制参数在选择的小区上进行连接 恢复。
在一个实施例中，网络设备可以指示终端，根据配置给源小区的无线资源控制参数在选择的小区上进行连接恢复，由于源小区的无线资源控制参数在终端进行至少一个小区选择之前，已经由网络设备配置给终端了，所以本实施例中网络设备只需给终端配置预先预配置的无线资源控制参数以外的无线资源控制参数。据此，有利于简化连接恢复过程中网络设备为终端配置无线资源控制参数的过程，进而有利于尽快完成连接恢复。
关于图3所示实施例，可以独立实施，也可以在前文任一实施例的基础上实施。例如在图1所示实施例基础上，可以按照如下步骤实施：
确定至少一个小区变更失败；
在存在辅小区组的情况下，向所述辅小区组发送至少一个小区变更失败信息；
根据所述辅小区组的控制进行连接恢复。
相关的实施例可以参考前文描述，相关的实施例可以单独实施，也可以根据需要结合后实施，本公开并不限制。
图4是根据本公开的实施例示出的又一种小区变更失败处理方法的示意流程图。如图4所示，所述进行连接恢复包括：
在步骤S401中，通过源小区进行连接恢复。
在一个实施例中，源小区可以是终端进行至少一个小区变更之前所在至少一个小区中的一个或多个小区。
例如，在至少一个小区包括MCG时，源小区可以是进行至少一个小区变更之前所在MCG，例如MCG中的主小区和辅小区，或者，源小区可以是进行至少一个小区变更之前所在MCG中的主小区，或者，源小区可以是进行至少一个小区变更之前所在MCG中的辅小区。
例如，在至少一个小区包括主小区时，源小区可以是进行至少一个小区变更之前所在的主小区。
例如，在至少一个小区包括主小区和至少一个辅小区时，源小区可以是进行至少一个小区变更之前所在主小区和至少一个辅小区中的主小区和辅小区，或者，源小区可以是进行至少一个小区变更之前所在主小区和至少一个辅小区中的主小区，或者，源小区可以是进行至少一个小区变更之前所在主小区和至少一个辅小区中的辅小区。
终端在确定至少一个小区变更失败时，可以不进行小区选择，直接通过源小区进行连接恢复，例如继续在源小区上进行通信。在终端进行至少一个小区变更成功后，例如变更到目标小区后，目标小区可以向源小区发送反馈，以通知源小区，终端成功变更到目标小区。源小区在接收到目标小区的反馈之前，可以保持与终端的连接，以便终端可以在至少一个小区变更失败的情况下，直接通过源小区进行连接恢复；源小区在接收到目标小区的反馈之后，才会释放与终端之间的连接。
由于源小区可以保持与终端之间的连接，以供终端通过源小区进行连接恢复，所以此过程中无需进行无线资源控制重建，便于终端快速进行连接恢复。
在一个实施例中，所述通过源小区进行连接恢复包括：
向所述源小区发送至少一个小区变更失败信息；
接入所述源小区。
在一个实施例中，终端通过源小区进行连接恢复，可以先向源小区发送至少一个小区变更失败信息，以通知源小区，终端发生了至少一个小区变更失败，确保源小区可以据此得知终端需要接入源小区，进而终端接入源小区，可以与源小区顺利进行通信，在此过程中无需进行无线资源控制重建。
在一个实施例中，所述进行连接恢复还包括：
在接入所述源小区失败的情况下，进行小区选择，通过选择的小区进行无线资源控制重 建以恢复连接。
在一个实施例中，终端通过源小区进行连接恢复，需要接入源小区。例如先向源小区发送至少一个小区变更失败信息，在接收到所述至少一个小区中第一小区的下行传输时，可以确定接入源小区成功。而若未接收到所述至少一个小区中第一小区的下行传输，例如从向源小区发送至少一个小区变更失败信息开始的第四预设时长范围内未接收到所述至少一个小区中第一小区的下行传输，可以确定接入源小区失败，那么终端可以进行小区选择，通过选择的小区进行无线资源控制重建以恢复连接。
需要说明的是，本实施例中的无线资源控制重建，与相关技术中的无线资源控制重建可以不同。
在一个实施例中，所述通过选择的小区进行无线资源控制重建以恢复连接包括：
在选择的小区为预先预配置了无线资源控制参数的候选小区的情况下，根据所述无线资源控制参数在所述候选小区上进行连接恢复。
在一个实施例中，候选小区可以是终端在进行至少一个小区变更之前，通过L3进行测量和上报测量结果，网络设备根据测量结果为终端选定的，并且网络设备为终端配置了候选小区的无线资源控制参数。
终端在小区选择时，选择了候选小区的情况下，可以根据预先配置的候选小区的无线资源控制参数在候选小区上进行连接恢复，相对于相关技术中的无线资源控制重建过程，由于候选小区的无线资源控制参数在终端进行至少一个小区选择之前，已经由网络设备配置给终端了，所以本实施例中网络设备只需给终端配置预先预配置的无线资源控制参数以外的无线资源控制参数。
在一个实施例中，所述通过选择的小区进行无线资源控制重建以恢复连接包括：
基于网络设备的指示，根据配置给源小区的无线资源控制参数在选择的小区上进行连接恢复。
在一个实施例中，网络设备可以指示终端，根据配置给源小区的无线资源控制参数在选择的小区上进行连接恢复，由于源小区的无线资源控制参数在终端进行至少一个小区选择之前，已经由网络设备配置给终端了，所以本实施例中网络设备只需给终端配置预先预配置的无线资源控制参数以外的无线资源控制参数。据此，有利于简化连接恢复过程中网络设备为终端配置无线资源控制参数的过程，进而有利于尽快完成连接恢复。
关于图4所示实施例，可以独立实施，也可以在前文任一实施例的基础上实施。例如在图1所示实施例基础上，可以按照如下步骤实施：
确定至少一个小区变更失败；
通过源小区进行连接恢复。
相关的实施例可以参考前文描述，相关的实施例可以单独实施，也可以根据需要结合后实施，本公开并不限制。
图5是根据本公开的实施例示出的又一种小区变更失败处理方法的示意流程图。如图5所示，所述方法还包括：
在步骤S501中，对预先确定的多个小区进行评估；
在步骤S502中，确定满足评估条件的小区；
其中，所述进行连接恢复(例如图1所示实施例中步骤S102，或者前文任一实施例中的进行连接恢复)包括：
在步骤S503中，通过所述满足评估条件的小区进行连接恢复。
在一个实施例中，终端在至少一个小区变更之前，可以预先确定多个小区，例如多个小区可以根据协议约定确定，多个小区也根据网络设备配置的小区列表确定。终端可以对多个小区进行评估，并确定满足评估条件的小区，进而在至少一个小区变更失败后，进行连接恢复时，可以通过满足评估条件的小区进行连接恢复(例如通过无线资源控制重建实现)，而不必再进行小区选择操作，据此，有利于快速完成连接恢复。
其中，对多个小区进行评估的方式可以根据需要进行设置，本公开并不限制。例如对于多个小区中的每个小区，可以以小区的波束质量平均值Q(例如多次测量小区的波束质量的均值确定)表征该小区的信道条件。
例如评估条件是Q大于阈值T1，如果小区对应Q大于阈值T1，可以将小区确定为满足评估条件的小区，添加至备选小区集合，后续终端可以在备选小区集合中选择小区进行连接恢复。而对于备选小区集合中的小区，可以继续进行评估，当某一次评估的Q不大于阈值T1，可以将小区从备选小区集合中移除。
例如评估条件连续N次测得的Q大于阈值T1，可以根据小区连续多次评估结果确定小区是否满足评估条件，例如对于小区连续评估多次得到的Q都大于T1，才将小区确定为满足评估条件的小区，添加至备选小区集合，后续终端可以在备选小区集合中选择小区进行连接恢复。而对于备选小区集合中的小区，可以继续进行评估，当连续评估的Q小于阈值T2(可以等于T1，或者为比T1小的值，或者为比T1大的值)，可以将小区从备选小区集合中移除。
在一个实施例中，当存在多个满足评估条件的小区时，终端可以自行选择一个小区进行连接恢复，也可以根据预定义规则确定一个小区进行连接恢复，例如选择最近一次评估满足评估结果的小区进行连接恢复。
在一个实施例中，若对于满足评估条件的小区，网络设备预先通过定时提前管理(TA management)告知了终端该小区的定时提前(Timing Advance.，TA)，那么可以认为终端在该小区上完成了上行同步，则不必进行随机接入，就可以向该小区发送信息，例如使用预留资源(可以是预先配置的)发送消息，据此，有利于快速完成连接恢复。而对于没有预先告知TA的满足评估条件的小区，终端小区上进行连接恢复，需要进行随机接入。
在一个实施例中，所述预先确定的多个小区包括以下至少之一：
源小区；
预先预配置了无线资源控制参数的候选小区。
在一个实施例中，在源小区满足评估条件的情况下，由于源小区的无线资源控制参数对于终端而言是已知的，所以终端通过源小区进行连接恢复时，网络设备可以不必为终端再度配置源小区的无线资源控制参数，据此，有利于简化连接恢复过程中网络设备为终端配置无线资源控制参数的过程，进而有利于尽快完成连接恢复。
在一个实施例中，在候选小区满足评估条件的情况下，终端通过候选小区进行连接恢复。其中，候选小区可以是终端在进行至少一个小区变更之前，通过L3进行测量和上报测量结果，网络设备根据测量结果为终端选定的，并且网络设备为终端配置了候选小区的无线资源控制参数(例如物理下行控制信道资源等)。
由于终端进行至少一个小区变更，原因一般是源小区的服务质量相对较差，所进行至少一个小区变更失败后，通过源小区进行连接恢复，源小区可能并不是合适的小区。而如果在进行至少一个小区变更失败后，通过无线资源控制重建的方式进行连接恢复，由于需要进行小区选择，耗时较长，会导致连接中断时间较长。
而根据本实施例，由于候选小区的无线资源控制参数在终端进行至少一个小区选择之前，已经由网络设备配置给终端了，所以对于候选小区，网络设备只需给终端配置预先预配置的无线资源控制参数以外的无线资源控制参数。据此，相对于通过源小区进行连接恢复，有利于通过更为合适的小区进行连接恢复，相对于通过无线资源控制重建的方式进行连接恢复，有利于简化连接恢复过程中网络设备为终端配置无线资源控制参数的过程，以便尽快完成连接恢复。
在一个实施例中，所述进行连接恢复还包括：
在不存在满足评估条件的小区的情况下，进行小区选择，通过选择的小区进行无线资源控制重建以恢复连接。
在一个实施例中，终端对多个小区进行评估，可能出现在不存在满足评估条件的小区的情况，那么在这种情况相下，终端可以进行小区选择，通过选择的小区进行无线资源控制重建以恢复连接。
需要说明的是，本实施例中的无线资源控制重建，与相关技术中的无线资源控制重建可以不同。
在一个实施例中，所述通过选择的小区进行无线资源控制重建以恢复连接包括：
在选择的小区为预先预配置了无线资源控制参数的候选小区的情况下，根据所述无线资源控制参数在所述候选小区上进行连接恢复。
在一个实施例中，候选小区可以是终端在进行至少一个小区变更之前，通过L3进行测量和上报测量结果，网络设备根据测量结果为终端选定的，并且网络设备为终端配置了候选小区的无线资源控制参数。
终端在小区选择时，选择了候选小区的情况下，可以根据预先配置的候选小区的无线资源控制参数在候选小区上进行连接恢复，相对于相关技术中的无线资源控制重建过程，由于候选小区的无线资源控制参数在终端进行至少一个小区选择之前，已经由网络设备配置给终端了，所以本实施例中网络设备只需给终端配置预先预配置的无线资源控制参数以外的无线资源控制参数。
在一个实施例中，所述通过选择的小区进行无线资源控制重建以恢复连接包括：
基于网络设备的指示，根据配置给源小区的无线资源控制参数在选择的小区上进行连接恢复。
在一个实施例中，网络设备可以指示终端，根据配置给源小区的无线资源控制参数在选择的小区上进行连接恢复，由于源小区的无线资源控制参数在终端进行至少一个小区选择之前，已经由网络设备配置给终端了，所以本实施例中网络设备只需给终端配置预先预配置的无线资源控制参数以外的无线资源控制参数。据此，有利于简化连接恢复过程中网络设备为终端配置无线资源控制参数的过程，进而有利于尽快完成连接恢复。
关于图5所示实施例，可以独立实施，也可以在前文任一实施例的基础上实施。例如在图1所示实施例基础上，可以按照如下步骤实施：
对预先确定的多个小区进行评估；
确定满足评估条件的小区；
确定至少一个小区变更失败；
通过所述满足评估条件的小区进行连接恢复。
相关的实施例可以参考前文描述，相关的实施例可以单独实施，也可以根据需要结合后实施，本公开并不限制。
图6是根据本公开的实施例示出的又一种小区变更失败处理方法的示意流程图。如图6所示，所述进行连接恢复包括：
在步骤S601中，确定网络设备所指示的用于连接恢复的小区；
在步骤S602中，通过所述用于连接恢复的小区进行连接恢复。
在一个实施例中，网络设备可以向终端指示用于连接恢复的小区，那么终端在至少一个小区变更失败后，进行连接恢复时，无需进行小区选择，直接通过网络设备所指示的用于连接恢复的小区进行连接恢复即可。例如，网络设备可以在向终端发送的至少一个小区变更的命令中指示用于连接恢复的小区。
在一个实施例中，所述进行连接恢复还包括：
在通过所述用于连接恢复的小区进行连接恢复失败时，进行小区选择，通过选择的小区进行无线资源控制重建以恢复连接。
在一个实施例中，终端通过网络设备指示的用于连接恢复的小区进行连接恢复，需要接入源小区。例如先向用于连接恢复的小区发送至少一个小区变更失败信息，在接收到用于连接恢复的小区的下行传输时，可以确定接入用于连接恢复的小区成功。而若未接收到用于连接恢复的小区的下行传输，例如从向用于连接恢复的小区发送至少一个小区变更失败信息开始的第五预设时长范围内未接收到用于连接恢复的小区的下行传输，可以确定接入用于连接恢复的小区失败， 那么终端可以进行小区选择，通过选择的小区进行无线资源控制重建以恢复连接。
需要说明的是，本实施例中的无线资源控制重建，与相关技术中的无线资源控制重建可以不同。
在一个实施例中，所述通过选择的小区进行无线资源控制重建以恢复连接包括：
在选择的小区为预先预配置了无线资源控制参数的候选小区的情况下，根据所述无线资源控制参数在所述候选小区上进行连接恢复。
在一个实施例中，候选小区可以是终端在进行至少一个小区变更之前，通过L3进行测量和上报测量结果，网络设备根据测量结果为终端选定的，并且网络设备为终端配置了候选小区的无线资源控制参数。
终端在小区选择时，选择了候选小区的情况下，可以根据预先配置的候选小区的无线资源控制参数在候选小区上进行连接恢复，相对于相关技术中的无线资源控制重建过程，由于候选小区的无线资源控制参数在终端进行至少一个小区选择之前，已经由网络设备配置给终端了，所以本实施例中网络设备只需给终端配置预先预配置的无线资源控制参数以外的无线资源控制参数。
在一个实施例中，所述通过选择的小区进行无线资源控制重建以恢复连接包括：
基于网络设备的指示，根据配置给源小区的无线资源控制参数在选择的小区上进行连接恢复。
在一个实施例中，网络设备可以指示终端，根据配置给源小区的无线资源控制参数在选择的小区上进行连接恢复，由于源小区的无线资源控制参数在终端进行至少一个小区选择之前，已经由网络设备配置给终端了，所以本实施例中网络设备只需给终端配置预先预配置的无线资源控制参数以外的无线资源控制参数。据此，有利于简化连接恢复过程中网络设备为终端配置无线资源控制参数的过程，进而有利于尽快完成连接恢复。
关于图6所示实施例，可以独立实施，也可以在前文任一实施例的基础上实施。例如在图1所示实施例基础上，可以按照如下步骤实施：
确定至少一个小区变更失败；
确定网络设备所指示的用于连接恢复的小区；
通过所述用于连接恢复的小区进行连接恢复。
相关的实施例可以参考前文描述，相关的实施例可以单独实施，也可以根据需要结合后实施，本公开并不限制。
图7是根据本公开的实施例示出的又一种小区变更失败处理方法的示意流程图。如图7所示，所述进行连接恢复包括：
在步骤S701中，进行小区选择，通过选择的小区进行无线资源控制重建以恢复连接。
在一个实施例中，终端在至少一个小区变更失败后，进行连接恢复时，可以进行小区选择，并通过选择的小区进行无线资源控制重建以恢复连接。
需要说明的是，本公开实施例中的无线资源控制重建与相关技术中的无线资源控制重建有所不同，以下通过几个实施例进行说明。
在一个实施例中，所述通过选择的小区进行无线资源控制重建以恢复连接包括：
在选择的小区为预先预配置了无线资源控制参数的候选小区的情况下，根据所述无线资源控制参数在所述候选小区上进行连接恢复。
在一个实施例中，候选小区可以是终端在进行至少一个小区变更之前，通过L3进行测量和上报测量结果，网络设备根据测量结果为终端选定的，并且网络设备为终端配置了候选小区的无线资源控制参数。
终端在小区选择时，选择了候选小区的情况下，可以根据预先配置的候选小区的无线资源控制参数在候选小区上进行连接恢复，相对于相关技术中的无线资源控制重建过程，由于候选小区的无线资源控制参数在终端进行至少一个小区选择之前，已经由网络设备配置给终端了，所 以本实施例中网络设备只需给终端配置预先预配置的无线资源控制参数以外的无线资源控制参数。据此，有利于简化连接恢复过程中网络设备为终端配置无线资源控制参数的过程，进而有利于尽快完成连接恢复。
其中，终端通过候选小区进行连接恢复的尝试次数n可以是有限的，例如尝试次数可以基于协议约定确定，也可以由网络设备指示。终端可以在通过候选小区进行连接恢复失败的情况下，可以再次通过候选小区进行连接恢复失败，直至达到尝试次数n，然后可以通过其他方式进行连接恢复，以免过多次地尝试而导致连接恢复较慢，且浪费资源。
在一个实施例中，所述通过选择的小区进行无线资源控制重建以恢复连接包括：
基于网络设备的指示，根据配置给源小区的无线资源控制参数在选择的小区上进行连接恢复。
在一个实施例中，网络设备可以指示终端，根据配置给源小区的无线资源控制参数在选择的小区上进行连接恢复，由于源小区的无线资源控制参数在终端进行至少一个小区选择之前，已经由网络设备配置给终端了，所以本实施例中网络设备只需给终端配置预先预配置的无线资源控制参数以外的无线资源控制参数。据此，有利于简化连接恢复过程中网络设备为终端配置无线资源控制参数的过程，进而有利于尽快完成连接恢复。
关于图7所示实施例，可以独立实施，也可以在前文任一实施例的基础上实施。例如在图1所示实施例基础上，可以按照如下步骤实施：
确定至少一个小区变更失败；
进行小区选择，通过选择的小区进行无线资源控制重建以恢复连接。
相关的实施例可以参考前文描述，相关的实施例可以单独实施，也可以根据需要结合后实施，本公开并不限制。
图8是根据本公开的实施例示出的一种小区变更失败处理方法的示意流程图。本实施例所示的变更失败处理方法可以由网络设备执行，所述网络设备可以与终端通信，所述网络设备包括但不限于4G基站、5G基站、6G基站等通信系统中的基站，所述终端包括但不限于手机、平板电脑、可穿戴设备、传感器、物联网设备等通信装置。
如图8所示，所述变更失败处理方法可以包括以下步骤：
在步骤S801中，在终端进行至少一个小区变更失败的情况下，与所述终端进行连接恢复。
需要说明的是，在一个实施例中，至少一个小区变更(Switch)，与相关技术中的小区切换(handover)是不同的。
相关技术中的小区切换过程中对小区的测量操作是在L3(层3)执行的，并且需要执行小区选择/选取重选等操作，小区切换的过程需要基于RRC信令实现。而本公开实施例中的至少一个小区变更，对至少一个小区的测量操作是在L1(层1)执行的，而且可以不进行小区选择/小区重选等操作，也可以不基于RRC信令实现。
在一个实施例中，至少一个小区可以视作一个小区集合，小区集合包含一个或多个小区。其中，在小区集合包含多个小区的情况下，多个小区中的每个小区可以属于相同类型，或者，多个小区中的至少两个小区可以属于不同类型。本实施例可以适用于后续任一个涉及至少一个小区的实施例。
在一个实施例中，所述至少一个小区包括以下至少之一：
主小区组MCG；
主小区(Pcell)；
主小区(Pcell)和至少一个辅小区(Scell)。
在一个实施例中，终端在某些场景下，可以在至少一个小区中进行通信，例如在双连接DC场景下，终端可以在至少一个小区和辅小区组SCG上与网络设备进行通信。在载波聚合(Carrier Aggregation，CA)场景下，终端可以在主小区和至少一个辅小区上进行通信。在非载波聚合场景下，终端可以在主小区上进行通信。
其中，主小区组可以包括主小区和至少一个辅小区；辅小区组可以包括主辅小区(PScell)和至少一个辅小区。当然，主小区组和辅小区组的构成并不限于以上情况，具体可以根据需要设置。
在某些事件发生时，终端可以确定需要进行至少一个小区变更。以下对该事件的几种情况进行示例性描述：
例如，终端在接收到所述至少一个小区中第一小区发送的变更命令(switch command)时，可以确定第一小区需要终端进行至少一个小区变更。在本实施例中，第一小区可以是终端进行至少一个小区变更前所在至少一个小区中的一个或多个小区，例如变更前所在至少一个小区为MCG，那么第一小区可以是MCG中的主小区(Pcell)、也可以是MCG中的一个或多个辅小区(Scell)。
例如，终端在接收到所述至少一个小区中第一小区发送的变更命令后，向所述第一小区发送所述变更命令的反馈(feedback)，可以确定终端同意进行至少一个小区变更命，那么就需要进行至少一个小区变更。其中，反馈可以以混合自动重传请求HARQ的形式发送，也可以以媒体接入控制层控制元素MAC CE的形式发送，具体可以根据需要设置。
例如，终端确定满足触发所述至少一个小区变更的条件时，那么可以确定终端自身需要进行至少一个小区变更，例如由终端的用户触发的，从而可以确定需要进行至少一个小区变更。
例如，终端在释放所述至少一个小区中的主小区(包括但不限于释放了主小区的MAC层参数)时，可以确定需要进行至少一个小区变更。由于终端在至少一个小区上进行通信，主要就是在至少一个小区中的主小区上进行通信，当终端释放了主小区，就不会在主小区上通信了，所以可以确定需要进行至少一个小区变更。
应当理解的是，使得终端确定需要进行至少一个小区变更的事件，并不限于上述几种，具体可以根据需要进行设置。
在一个实施例中，终端在确定需要进行至少一个小区变更时，可以进行至少一个小区变更。
例如在至少一个小区包括MCG时，进行至少一个小区变更，可以变更MCG，例如变更MCG中的所有小区(主小区和辅小区)，或者变更MCG中的部分小区。
例如在至少一个小区包括主小区时，进行至少一个小区变更，可以变更主小区。
例如在至少一个小区包括主小区和至少一个辅小区时，进行至少一个小区变更，可以变更主小区和至少一个辅小区。
在某些情况下，终端进行至少一个小区变更，会发生至少一个小区变更失败。关于至少一个小区变更失败的判断方式，可以以及定时器实现，相关实现方式在前文终端侧实施例已有描述，此处就不赘述了。
根据本实施例，网络设备在确定终端至少一个小区变更失败的情况下，可以与终端进行连接恢复，例如恢复终端与小区之间的连接，从而确保终端能够继续保持通信，而不会因为至少一个小区变更失败而没有连接的小区导致通信中断。
图9是根据本公开的实施例示出的另一种小区变更失败处理方法的示意流程图。如图9所示，所述与所述终端进行连接恢复包括：
在步骤S901中，在为所述终端配置了辅小区组的情况下，通过所述辅小区组接收所述终端发送的至少一个小区变更失败信息；
在步骤S902中，通过所述辅小区组控制所述终端进行连接恢复。
在一个实施例中，网络设备在为终端配置了辅小区组，且辅小区组处于可用状态时，若网络设备配置终端，使得终端可以向辅小区组发送至少一个小区变更失败信息，或者协议约定终端可以向辅小区组发送至少一个小区变更失败信息，那么终端可以向辅小区组发送至少一个小区变更失败信息，进而基站在通过辅小区组接收到至少一个小区变更失败信息后，可以通过辅小区组控制终端进行连接恢复。
其中，网络设备通过辅小区组控制终端进行连接恢复的过程具体基于网络设备的实现，本公开并不限制。例如网络设备可以控制终端将辅小区组作为至少一个小区接入以恢复连接，例 如网络设备可以通过辅小区组可以为终端指定一个小区组作为至少一个小区接入以恢复连接。
在一个实施例中，所述与所述终端进行连接恢复还包括：
在没有为所述终端配置辅小区组或者为所述终端配置的辅小区组不可用的情况下，通过所述终端选择的小区进行无线资源控制重建以恢复连接。
在一个实施例中，在没有为所述终端配置辅小区组或者为所述终端配置的辅小区组不可用的情况下，终端可以进行小区选择，那么网络设备可以通过终端选择的小区与终端进行无线资源控制重建从而恢复连接。
需要说明的是，本实施例中的无线资源控制重建，与相关技术中的无线资源控制重建可以不同。
在一个实施例中，所述通过所述终端选择的小区进行无线资源控制重建包括：
在所述终端选择的小区为预先预配置了无线资源控制参数的候选小区的情况下，根据所述无线资源控制参数在所述候选小区上与所述终端进行连接恢复。
在一个实施例中，候选小区可以是终端在进行至少一个小区变更之前，通过L3进行测量和上报测量结果，网络设备根据测量结果为终端选定的，并且网络设备为终端配置了候选小区的无线资源控制参数。
在终端进行小区选择，选择了候选小区的情况下，网络设备根据预先配置的候选小区的无线资源控制参数在候选小区上与终端进行连接恢复，相对于相关技术中的无线资源控制重建过程，由于候选小区的无线资源控制参数在终端进行至少一个小区选择之前，已经由网络设备配置给终端了，所以本实施例中网络设备只需给终端配置预先预配置的无线资源控制参数以外的无线资源控制参数。
在一个实施例中，所述通过所述终端选择的小区进行无线资源控制重建包括：
指示所述终端根据配置给源小区的无线资源控制参数在选择的小区上进行连接恢复；
根据配置给源小区的无线资源控制参数在选择的小区上与所述终端进行连接恢复。
在一个实施例中，网络设备可以指示终端，根据配置给源小区的无线资源控制参数在选择的小区上进行连接恢复，由于源小区的无线资源控制参数在终端进行至少一个小区选择之前，已经由网络设备配置给终端了，所以本实施例中网络设备只需给终端配置预先预配置的无线资源控制参数以外的无线资源控制参数。据此，有利于简化连接恢复过程中网络设备为终端配置无线资源控制参数的过程，进而有利于尽快完成连接恢复。
关于图9所示实施例，可以独立实施，也可以在前文任一实施例的基础上实施。例如在图8所示实施例基础上，可以按照如下步骤实施：
在终端进行至少一个小区变更失败的情况下，且在为所述终端配置了辅小区组的情况下，通过所述辅小区组接收所述终端发送的至少一个小区变更失败信息；
通过所述辅小区组控制所述终端进行连接恢复。
相关的实施例可以参考前文描述，相关的实施例可以单独实施，也可以根据需要结合后实施，本公开并不限制。
图10是根据本公开的实施例示出的又一种小区变更失败处理方法的示意流程图。如图10所示，所述与所述终端进行连接恢复包括：
在步骤S1001中，保持源小区与所述终端的连接，通过所述源小区与所述终端进行连接恢复。
在一个实施例中，源小区可以是终端进行至少一个小区变更之前所在至少一个小区中的一个或多个小区。
例如，在至少一个小区包括MCG时，源小区可以是进行至少一个小区变更之前所在MCG，例如MCG中的主小区和辅小区，或者，源小区可以是进行至少一个小区变更之前所在MCG中的主小区，或者，源小区可以是进行至少一个小区变更之前所在MCG中的辅小区。
例如，在至少一个小区包括主小区时，源小区可以是进行至少一个小区变更之前所在的主小区。
例如，在至少一个小区包括主小区和至少一个辅小区时，源小区可以是进行至少一个小区变更之前所在主小区和至少一个辅小区中的主小区和辅小区，或者，源小区可以是进行至少一个小区变更之前所在主小区和至少一个辅小区中的主小区，或者，源小区可以是进行至少一个小区变更之前所在主小区和至少一个辅小区中的辅小区。
在终端至少一个小区变更成功后，例如变更到目标小区后，目标小区可以向源小区发送反馈，以通知源小区，终端成功变更到目标小区。网络设备在接收到目标小区的反馈之前，可以保持源小区与终端的连接，以便可以在终端至少一个小区变更失败的情况下，直接通过源小区与终端进行连接恢复；网络设备在接收到目标小区的反馈之后，才会释放源小区与终端之间的连接。
通过保持源小区与终端之间的连接，以供终端通过源小区进行连接恢复，此过程中无需进行无线资源控制重建，便于终端快速进行连接恢复。
在一个实施例中，所述通过源小区与所述终端进行连接恢复包括：
通过所述源小区接收所述终端发送的至少一个小区变更失败信息。
在一个实施例中，终端通过源小区进行连接恢复，可以先向源小区发送至少一个小区变更失败信息，网络设备可以通过源小区接收终端发送的至少一个小区变更失败信息，据此可以确定终端发生了至少一个小区变更失败，终端需要接入源小区，进而终端接入源小区，可以与源小区顺利进行通信，在此过程中无需进行无线资源控制重建。
在一个实施例中，所述与所述终端进行连接恢复还包括：
在所述终端接入所述源小区失败的情况下，通过所述终端选择的小区进行无线资源控制重建以恢复连接。
在一个实施例中，终端通过源小区进行连接恢复，需要接入源小区。例如先向源小区发送至少一个小区变更失败信息，在接收到所述至少一个小区中第一小区的下行传输时，可以确定接入源小区成功。而若未接收到所述至少一个小区中第一小区的下行传输，例如从向源小区发送至少一个小区变更失败信息开始的第四预设时长范围内未接收到所述至少一个小区中第一小区的下行传输，可以确定接入源小区失败，那么终端可以进行小区选择，网络设备则可以通过终端选择的小区与终端进行无线资源控制重建以恢复连接。
需要说明的是，第一小区并非特指某个小区，而是指终端进行至少一个小区变更前所在的至少一个小区中的任一个小区。
需要说明的是，本实施例中的无线资源控制重建，与相关技术中的无线资源控制重建可以不同。
在一个实施例中，所述通过所述终端选择的小区进行无线资源控制重建包括：
在所述终端选择的小区为预先预配置了无线资源控制参数的候选小区的情况下，根据所述无线资源控制参数在所述候选小区上与所述终端进行连接恢复。
在一个实施例中，候选小区可以是终端在进行至少一个小区变更之前，通过L3进行测量和上报测量结果，网络设备根据测量结果为终端选定的，并且网络设备为终端配置了候选小区的无线资源控制参数。
在终端进行小区选择，选择了候选小区的情况下，网络设备根据预先配置的候选小区的无线资源控制参数在候选小区上与终端进行连接恢复，相对于相关技术中的无线资源控制重建过程，由于候选小区的无线资源控制参数在终端进行至少一个小区选择之前，已经由网络设备配置给终端了，所以本实施例中网络设备只需给终端配置预先预配置的无线资源控制参数以外的无线资源控制参数。
在一个实施例中，所述通过所述终端选择的小区进行无线资源控制重建包括：
指示所述终端根据配置给源小区的无线资源控制参数在选择的小区上进行连接恢复；
根据配置给源小区的无线资源控制参数在选择的小区上与所述终端进行连接恢复。
在一个实施例中，网络设备可以指示终端，根据配置给源小区的无线资源控制参数在选择的小区上进行连接恢复，由于源小区的无线资源控制参数在终端进行至少一个小区选择之前，已经由网络设备配置给终端了，所以本实施例中网络设备只需给终端配置预先预配置的无线资源控制参数以外的无线资源控制参数。据此，有利于简化连接恢复过程中网络设备为终端配置无线资源控制参数的过程，进而有利于尽快完成连接恢复。
关于图10所示实施例，可以独立实施，也可以在前文任一实施例的基础上实施。例如在图8所示实施例基础上，可以按照如下步骤实施：
在终端进行至少一个小区变更失败的情况下，保持源小区与所述终端的连接，通过所述源小区与所述终端进行连接恢复。
相关的实施例可以参考前文描述，相关的实施例可以单独实施，也可以根据需要结合后实施，本公开并不限制。
图11是根据本公开的实施例示出的又一种小区变更失败处理方法的示意流程图。如图11所示，所述与所述终端进行连接恢复包括：
在步骤S1101中，通过所述终端对预先确定的多个小区进行评估确定的满足评估条件的小区进行连接恢复。
在一个实施例中，终端在至少一个小区变更之前，可以预先确定多个小区，例如多个小区可以根据协议约定确定，多个小区也根据网络设备配置的小区列表确定。终端可以对多个小区进行评估，并确定满足评估条件的小区，进而在至少一个小区变更失败后，网络设备可以通过满足评估条件的小区与终端进行连接恢复(例如基于无线资源控制重建实现)，而终端不必进行小区选择操作，据此，有利于快速完成连接恢复。
其中，对多个小区进行评估的方式可以根据需要进行设置，本公开并不限制。例如可以基于终端侧相关实施例实现，此处就不再赘述了。
在一个实施例中，所述预先确定的多个小区包括以下至少之一：
源小区；
预先预配置了无线资源控制参数的候选小区。
在一个实施例中，在源小区满足评估条件的情况下，由于源小区的无线资源控制参数对于终端而言是已知的，所以终端通过源小区进行连接恢复时，网络设备可以不必为终端再度配置源小区的无线资源控制参数，据此，有利于简化连接恢复过程中网络设备为终端配置无线资源控制参数的过程，进而有利于尽快完成连接恢复。
在一个实施例中，在候选小区满足评估条件的情况下，终端通过候选小区进行连接恢复。其中，候选小区可以是终端在进行至少一个小区变更之前，通过L3进行测量和上报测量结果，网络设备根据测量结果为终端选定的，并且网络设备为终端配置了候选小区的无线资源控制参数(例如物理下行控制信道资源等)。
由于终端进行至少一个小区变更，原因一般是源小区的服务质量相对较差，所进行至少一个小区变更失败后，通过源小区进行连接恢复，源小区可能并不是合适的小区。而如果在进行至少一个小区变更失败后，通过无线资源控制重建的方式进行连接恢复，由于需要进行小区选择，耗时较长，会导致连接中断时间较长。
而根据本实施例，由于候选小区的无线资源控制参数在终端进行至少一个小区选择之前，网络设备已经配置给终端了，所以对于候选小区，网络设备只需给终端配置预先预配置的无线资源控制参数以外的无线资源控制参数。据此，相对于通过源小区进行连接恢复，有利于通过更为合适的小区进行连接恢复，相对于通过无线资源控制重建的方式进行连接恢复，有利于简化连接恢复过程中网络设备为终端配置无线资源控制参数的过程，以便尽快完成连接恢复。
在一个实施例中，所述与所述终端进行连接恢复还包括：
在不存在满足评估条件的小区的情况下，通过所述终端选择的小区进行无线资源控制重建以恢复连接。
在一个实施例中，终端对多个小区进行评估，可能出现在不存在满足评估条件的小区的 情况，那么在这种情况相下，终端可以进行小区选择，网络设备可以通过终端选择的小区进行无线资源控制重建以恢复连接。
需要说明的是，本实施例中的无线资源控制重建，与相关技术中的无线资源控制重建可以不同。
在一个实施例中，所述通过所述终端选择的小区进行无线资源控制重建包括：
在所述终端选择的小区为预先预配置了无线资源控制参数的候选小区的情况下，根据所述无线资源控制参数在所述候选小区上与所述终端进行连接恢复。
在一个实施例中，候选小区可以是终端在进行至少一个小区变更之前，通过L3进行测量和上报测量结果，网络设备根据测量结果为终端选定的，并且网络设备为终端配置了候选小区的无线资源控制参数。
在终端进行小区选择，选择了候选小区的情况下，网络设备根据预先配置的候选小区的无线资源控制参数在候选小区上与终端进行连接恢复，相对于相关技术中的无线资源控制重建过程，由于候选小区的无线资源控制参数在终端进行至少一个小区选择之前，已经由网络设备配置给终端了，所以本实施例中网络设备只需给终端配置预先预配置的无线资源控制参数以外的无线资源控制参数。
在一个实施例中，所述通过所述终端选择的小区进行无线资源控制重建包括：
指示所述终端根据配置给源小区的无线资源控制参数在选择的小区上进行连接恢复；
根据配置给源小区的无线资源控制参数在选择的小区上与所述终端进行连接恢复。
在一个实施例中，网络设备可以指示终端，根据配置给源小区的无线资源控制参数在选择的小区上进行连接恢复，由于源小区的无线资源控制参数在终端进行至少一个小区选择之前，已经由网络设备配置给终端了，所以本实施例中网络设备只需给终端配置预先预配置的无线资源控制参数以外的无线资源控制参数。据此，有利于简化连接恢复过程中网络设备为终端配置无线资源控制参数的过程，进而有利于尽快完成连接恢复。
关于图11所示实施例，可以独立实施，也可以在前文任一实施例的基础上实施。例如在图8所示实施例基础上，可以按照如下步骤实施：
在终端进行至少一个小区变更失败的情况下，通过所述终端对预先确定的多个小区进行评估确定的满足评估条件的小区进行连接恢复。
相关的实施例可以参考前文描述，相关的实施例可以单独实施，也可以根据需要结合后实施，本公开并不限制。
图12是根据本公开的实施例示出的又一种小区变更失败处理方法的示意流程图。如图12所示，所述与所述终端进行连接恢复包括：
在步骤S1201中，向所述终端发送至少一个小区变更的命令，所述命令用于指示的用于连接恢复的小区；
在步骤S1202中，通过所述用于连接恢复的小区与所述终端进行连接恢复。
在一个实施例中，在终端进行至少一个小区变更之前，网络设备可以向终端指示用于连接恢复的小区，那么终端在至少一个小区变更失败后，进行连接恢复时，无需进行小区选择，网络设备可以通过指示给终端的用于连接恢复的小区与终端进行连接恢复。例如，网络设备可以在向终端发送的至少一个小区变更的命令中指示用于连接恢复的小区。
在一个实施例中，所述与所述终端进行连接恢复还包括：
在通过所述用于连接恢复的小区与所述终端进行连接恢复失败时，通过所述终端选择的小区进行无线资源控制重建以恢复连接。
在一个实施例中，终端通过网络设备指示的用于连接恢复的小区进行连接恢复，需要接入源小区。例如先向用于连接恢复的小区发送至少一个小区变更失败信息，在接收到用于连接恢复的小区的下行传输时，可以确定接入用于连接恢复的小区成功。而若未接收到用于连接恢复的小区的下行传输，例如从向用于连接恢复的小区发送至少一个小区变更失败信息开始的第五预设 时长范围内未接收到用于连接恢复的小区的下行传输，可以确定接入用于连接恢复的小区失败，那么终端可以进行小区选择，网络设备可以通过终端选择的小区与终端进行无线资源控制重建以恢复连接。
需要说明的是，本实施例中的无线资源控制重建，与相关技术中的无线资源控制重建可以不同。
在一个实施例中，所述通过所述终端选择的小区进行无线资源控制重建包括：
在所述终端选择的小区为预先预配置了无线资源控制参数的候选小区的情况下，根据所述无线资源控制参数在所述候选小区上与所述终端进行连接恢复。
在一个实施例中，候选小区可以是终端在进行至少一个小区变更之前，通过L3进行测量和上报测量结果，网络设备根据测量结果为终端选定的，并且网络设备为终端配置了候选小区的无线资源控制参数。
在终端进行小区选择，选择了候选小区的情况下，网络设备根据预先配置的候选小区的无线资源控制参数在候选小区上与终端进行连接恢复，相对于相关技术中的无线资源控制重建过程，由于候选小区的无线资源控制参数在终端进行至少一个小区选择之前，已经由网络设备配置给终端了，所以本实施例中网络设备只需给终端配置预先预配置的无线资源控制参数以外的无线资源控制参数。
在一个实施例中，所述通过所述终端选择的小区进行无线资源控制重建包括：
指示所述终端根据配置给源小区的无线资源控制参数在选择的小区上进行连接恢复；
根据配置给源小区的无线资源控制参数在选择的小区上与所述终端进行连接恢复。
在一个实施例中，网络设备可以指示终端，根据配置给源小区的无线资源控制参数在选择的小区上进行连接恢复，由于源小区的无线资源控制参数在终端进行至少一个小区选择之前，已经由网络设备配置给终端了，所以本实施例中网络设备只需给终端配置预先预配置的无线资源控制参数以外的无线资源控制参数。据此，有利于简化连接恢复过程中网络设备为终端配置无线资源控制参数的过程，进而有利于尽快完成连接恢复。
关于图12所示实施例，可以独立实施，也可以在前文任一实施例的基础上实施。例如在图8所示实施例基础上，可以按照如下步骤实施：
在终端进行至少一个小区变更失败的情况下，向所述终端发送至少一个小区变更的命令，所述命令用于指示的用于连接恢复的小区；
通过所述用于连接恢复的小区与所述终端进行连接恢复。
相关的实施例可以参考前文描述，相关的实施例可以单独实施，也可以根据需要结合后实施，本公开并不限制。
图13是根据本公开的实施例示出的又一种小区变更失败处理方法的示意流程图。如图13所示，所述与所述终端进行连接恢复包括：
在步骤S1301中，通过所述终端选择的小区进行无线资源控制重建以恢复连接。
在一个实施例中，网络设备在确定终端至少一个小区变更失败后，与终端进行连接恢复时，可以通过终端小区选择所选择的小区与终端进行无线资源控制重建以恢复连接。
需要说明的是，本公开实施例中的无线资源控制重建与现骨干技术中的无线资源控制重建有所不同，以下通过几个实施例进行说明。
在一个实施例中，所述通过所述终端选择的小区进行无线资源控制重建包括：
在所述终端选择的小区为预先预配置了无线资源控制参数的候选小区的情况下，根据所述无线资源控制参数在所述候选小区上与所述终端进行连接恢复。
在一个实施例中，候选小区可以是终端在进行至少一个小区变更之前，通过L3进行测量和上报测量结果，网络设备根据测量结果为终端选定的，并且网络设备为终端配置了候选小区的无线资源控制参数。
在终端进行小区选择，选择了候选小区的情况下，网络设备根据预先配置的候选小区的无线资源控制参数在候选小区上与终端进行连接恢复，相对于相关技术中的无线资源控制重建过程，由于候选小区的无线资源控制参数在终端进行至少一个小区选择之前，已经由网络设备配置给终端了，所以本实施例中网络设备只需给终端配置预先预配置的无线资源控制参数以外的无线资源控制参数。据此，有利于简化连接恢复过程中网络设备为终端配置无线资源控制参数的过程，进而有利于尽快完成连接恢复。
其中，终端通过候选小区进行连接恢复的尝试次数n可以是有限的，例如尝试次数可以基于协议约定确定，也可以由网络设备指示。终端可以在通过候选小区进行连接恢复失败的情况下，可以再次通过候选小区进行连接恢复失败，直至达到尝试次数n，然后可以通过其他方式进行连接恢复，以免过多次地尝试而导致连接恢复较慢，且浪费资源。
在一个实施例中，所述通过所述终端选择的小区进行无线资源控制重建包括：
指示所述终端根据配置给源小区的无线资源控制参数在选择的小区上进行连接恢复；
根据配置给源小区的无线资源控制参数在选择的小区上与所述终端进行连接恢复。
在一个实施例中，网络设备可以指示终端，根据配置给源小区的无线资源控制参数在选择的小区上进行连接恢复，由于源小区的无线资源控制参数在终端进行至少一个小区选择之前，已经由网络设备配置给终端了，所以本实施例中网络设备只需给终端配置预先预配置的无线资源控制参数以外的无线资源控制参数。据此，有利于简化连接恢复过程中网络设备为终端配置无线资源控制参数的过程，进而有利于尽快完成连接恢复。
关于图13所示实施例，可以独立实施，也可以在前文任一实施例的基础上实施。例如在图8所示实施例基础上，可以按照如下步骤实施：
在终端进行至少一个小区变更失败的情况下，通过所述终端选择的小区进行无线资源控制重建以恢复连接。
相关的实施例可以参考前文描述，相关的实施例可以单独实施，也可以根据需要结合后实施，本公开并不限制。
与前述的小区变更失败处理方法的实施例相对应，本公开还提供了小区变更失败处理装置的实施例。
图14是根据本公开的实施例示出的一种小区变更失败处理装置的示意框图。本实施例所示的小区变更失败处理装置可以为终端，或者为终端中的模块构成的装置，所述终端包括但不限于手机、平板电脑、可穿戴设备、传感器、物联网设备等通信装置。所述终端可以与网络设备通信，所述网络设备包括但不限于4G、5G、6G等通信系统中的网络设备，例如基站、核心网等。
如图14所述，所述小区变更失败处理装置包括：
处理模块1401，被配置为确定至少一个小区变更失败；
连接模块1402，被配置为进行连接恢复。
在一个实施例中，所述处理模块，被配置为在与至少一个小区变更相关联的定时器超时时，确定至少一个小区变更失败。
在一个实施例中，触发所述定时器开始计时的事件包括以下至少之一：接收到所述至少一个小区中第一小区发送的变更命令；向所述第一小区发送所述变更命令的反馈；确定满足触发所述至少一个小区变更的条件；释放所述至少一个小区中的主小区。
在一个实施例中，在至少一个小区变更为基于随机接入的变更的情况下，触发所述定时器结束计时的事件包括：向目标小区发起的随机接入成功。
在一个实施例中，在至少一个小区变更为非基于随机接入的变更的情况下，触发所述定时器结束计时的事件包括以下至少之一：接收到目标小区发送的下行传输；接收到目标小区发送的用于调度新传的下行控制信息；接收到指示接入成功的反馈信息。
在一个实施例中，所述反馈信息包括以下至少之一：无线资源控制层信令；媒体接入控制层信令；物理层信令。
在一个实施例中，所述连接模块，被配置为在存在辅小区组的情况下，向所述辅小区组发送至少一个小区变更失败信息；根据所述辅小区组的控制进行连接恢复。
在一个实施例中，所述连接模块，还被配置为在不存在辅小区组的情况下，进行小区选择，通过选择的小区进行无线资源控制重建以恢复连接。
在一个实施例中，所述连接模块，被配置为通过源小区进行连接恢复。
在一个实施例中，所述连接模块，被配置为向所述源小区发送至少一个小区变更失败信息；接入所述源小区。
在一个实施例中，所述连接模块，还被配置为在接入所述源小区失败的情况下，进行小区选择，通过选择的小区进行无线资源控制重建以恢复连接。
在一个实施例中，所述处理模块，还被配置为对预先确定的多个小区进行评估；确定满足评估条件的小区；其中，所述连接模块，被配置为通过所述满足评估条件的小区进行连接恢复。
在一个实施例中，所述预先确定的多个小区包括以下至少之一：源小区；预先预配置了无线资源控制参数的候选小区。
在一个实施例中，所述连接模块，还被配置为在不存在满足评估条件的小区的情况下，进行小区选择，通过选择的小区进行无线资源控制重建以恢复连接。
在一个实施例中，所述连接模块，被配置为确定网络设备所指示的用于连接恢复的小区；通过所述用于连接恢复的小区进行连接恢复。
在一个实施例中，所述连接模块，还被配置为在通过所述用于连接恢复的小区进行连接恢复失败时，进行小区选择，通过选择的小区进行无线资源控制重建以恢复连接。
在一个实施例中，所述连接模块，被配置为进行小区选择，通过选择的小区进行无线资源控制重建以恢复连接。
在一个实施例中，所述连接模块，被配置为在选择的小区为预先预配置了无线资源控制参数的候选小区的情况下，根据所述无线资源控制参数在所述候选小区上进行连接恢复。
在一个实施例中，所述连接模块，被配置为基于网络设备的指示，根据配置给源小区的无线资源控制参数在选择的小区上进行连接恢复。
在一个实施例中，所述至少一个小区包括以下至少之一：主小区组；主小区；主小区和至少一个辅小区。
图15是根据本公开的实施例示出的一种小区变更失败处理装置的示意框图。本实施例所示的小区变更失败处理装置可以为网络设备，或者为网络设备中的模块构成的装置，所述网络设备可以与终端通信。所述终端包括但不限于手机、平板电脑、可穿戴设备、传感器、物联网设备等通信装置。所述网络设备包括但不限于4G、5G、6G等通信系统中的网络设备，例如基站、核心网等。
如图15所述，所述小区变更失败处理装置包括：
连接模块1501，被配置为在终端进行至少一个小区变更失败的情况下，与所述终端进行连接恢复。
在一个实施例中，所述连接模块，被配置为在为所述终端配置了辅小区组的情况下，通过所述辅小区组接收所述终端发送的至少一个小区变更失败信息；通过所述辅小区组控制所述终端进行连接恢复。
在一个实施例中，所述连接模块，还被配置为在没有为所述终端配置辅小区组或者为所述终端配置的辅小区组不可用的情况下，通过所述终端选择的小区进行无线资源控制重建以恢复连接。
在一个实施例中，所述连接模块，被配置为保持源小区与所述终端的连接，通过所述源小区与所述终端进行连接恢复。
在一个实施例中，所述连接模块，被配置为通过所述源小区接收所述终端发送的至少一 个小区变更失败信息。
在一个实施例中，所述连接模块，还被配置为在所述终端接入所述源小区失败的情况下，通过所述终端选择的小区进行无线资源控制重建以恢复连接。
在一个实施例中，所述连接模块，被配置为通过所述终端对预先确定的多个小区进行评估确定的满足评估条件的小区进行连接恢复。
在一个实施例中，所述预先确定的多个小区包括以下至少之一：源小区；预先预配置了无线资源控制参数的候选小区。
在一个实施例中，所述连接模块，被配置为在不存在满足评估条件的小区的情况下，通过所述终端选择的小区进行无线资源控制重建以恢复连接。
在一个实施例中，所述装置还包括：发送模块，被配置为向所述终端发送至少一个小区变更的命令，所述命令用于指示的用于连接恢复的小区；其中，连接模块，被配置为通过所述用于连接恢复的小区与所述终端进行连接恢复。
在一个实施例中，所述连接模块，还被配置为在通过所述用于连接恢复的小区与所述终端进行连接恢复失败时，通过所述终端选择的小区进行无线资源控制重建以恢复连接。
在一个实施例中，所述连接模块，被配置为通过所述终端选择的小区进行无线资源控制重建以恢复连接。
在一个实施例中，所述连接模块，被配置为在所述终端选择的小区为预先预配置了无线资源控制参数的候选小区的情况下，根据所述无线资源控制参数在所述候选小区上与所述终端进行连接恢复。
在一个实施例中，所述装置还包括：发送模块，被配置为指示所述终端根据配置给源小区的无线资源控制参数在选择的小区上进行连接恢复；其中，所述连接模块，被配置为根据配置给源小区的无线资源控制参数在选择的小区上与所述终端进行连接恢复。
在一个实施例中，引入基于计时器的小区变更失败(cell switch failure)恢复过程。
其中，关于cell switch failure探测：
在一个实施例中，可以定义一个新的定时器(timer)。
在一个实施例中，关于timer的开始时间，可以包括以下四种情况至少之一：
情况1：为接收到cell switch command的时候
情况2：向source MCG发送cell switch command feedback(i.e.HARQ/MAC CE)的时候；
情况3：满足cell switch触发事件(对于用户触发的cell switch)；
情况4：释放Pcell后；
其中，关于规定timer的结束时间：
对于基于随机接入的小区变更(RACH-based cell switch)情况下timer结束：
Successful RACH(Msg4/MsgB)，即用户完成到目标cell的随机接入过程；
对于基于非随机接入的小区变更(RACH-less cell switch)，可以在下面三种情况之一timer结束：
情况1：第一次接收到目标小区的DL传输的时候，具体地为接收到用户的C-RNTI加扰地PDCCH transmission；
情况2：第一次接收到调度了新的上行或者下行传输的DCI调度，且由用户的C-RNTI加扰的；
情况3：接收到显式的网络反馈信息，可以是特定的MAC CE或RRC message(消息)。如果采用MAC CE，可以有两种格式(Format)。格式1：定义新的MAC CE；格式2：复用Contention resolution MAC CE，只是要将该MAC CE的值置为预定义的值如全1或0。
当Timer超时，则认为出现了cell switch failure。
在一个实施例中，关于Cell switch failure恢复，可以基于以下几种方式中至少之一实现。
在一个实施例中，方式一：如果是终端有可用的SCG情况，并且网络配置或协议约定终端向SCG上报MCG failure，进而由SCG控制进行连接恢复。更进一步的，如果MCG failure，而且SCG也不可用，则触发如下的连接恢复(方式二)。
在一个实施例中，方式二：UE进行小区选择，通过选择的cell进行RRC重建以恢复连接，其中，主要包括以下两种情况：
情况1：如果选择的小区是候选配置中的小区，那么通过候选配置进行连接恢复，且该候选配置在failure过程使用n次。
情况2：在进行RRC重建的过程中，可以由网络指示是否通过switch前的源MCG中的小区的配置进行链接恢复。
在一个实施例中，方式三：略过cell选择过程，直接通过源小区进行连接恢复：
对于源小区，需要保留与用户的连接，等用户成功接入目标小区，由目标小区反馈后，再release与用户之间的link。
用户向源小区上报failure，不进行RRC重建，直接接入源小区。
如果失败，再进行cell选择和RRC重建过程(即再进行方式二)。
在一个实施例中，方式四：因为切换的原因是源小区的服务可能质量相对较差，方式三中源小区可能并不是合适的小区。而方式二中，failure之后需要进行cell selection，会导致中断时间较长。为此，考虑提前将恢复的cell选好，一旦出现failure，直接通过选定好的cell，进行RRC重建，恢复连接。
为用户配置一个cell列表，默认情况为各个候选cell和serving cell。对列表中的cell进行评估，如果满足特定条件，则将对应的cell作为可能的恢复cell。
评估方式：用cell的波束平均值Q代表该cell的信道条件。如果Q大于一定的阈值T1，则作为备选的恢复cell。如果已经作为备选的恢复cell的，在某次测量不满足条件了，将被从备选恢复cell中移除；或者，规定连续N次评估中，某个cell的Q都大于阈值，才能将其作为备选的恢复cell。而如果出现连续M次评估，该cell的Q有小于一定的阈值T2，则将其移除。
当出现cell switch failure之后，如果有满足条件的恢复cell，则通过该cell恢复连接；
或者，如果提前进行了TA management告知了该cell的TA，则通过预留资源，向该cell发送接入消息；
如果有多个满足条件的恢复cell，则有用户自行选择一个cell进行恢复
如果没有cell满足条件，则进行cell选择，进行连接恢复(即，再进行方式二的恢复方式)。
在一个实施例中，方式五：在cell switch command中指示多个cell，一个作为目标cell，另一个作为进行恢复的备选cell。如果failure则通过该cell进行连接恢复。如果恢复失败，则重新进行cell选择，并进行RRC重建。
需要说明的是，上述各个实施例之间，可以根据需要相互组合，调整顺序。
关于上述实施例中的装置，其中各个模块执行操作的具体方式已经在相关方法的实施例中进行了详细描述，此处将不做详细阐述说明。
对于装置实施例而言，由于其基本对应于方法实施例，所以相关之处参见方法实施例的部分说明即可。以上所描述的装置实施例仅仅是示意性的，其中所述作为分离部件说明的模块可以是或者也可以不是物理上分开的，作为模块显示的部件可以是或者也可以不是物理模块，即可以位于一个地方，或者也可以分布到多个网络模块上。可以根据实际的需要选择其中的部分或者全部模块来实现本实施例方案的目的。本领域普通技术人员在不付出创造性劳动的情况下，即可以理解并实施。
本公开的实施例还提出一种小区变更失败处理系统，包括终端、网络设备，其中所述终端被配置为实现上述任一实施例所述的由终端执行的小区变更失败处理方法，所述网络设备被配置为实现上述任一实施例所述的由网络设备执行的小区变更失败处理方法。
本公开的实施例还提出一种通信装置，包括：处理器；用于存储计算机程序的存储器；其中，当所述计算机程序被处理器执行时，实现上述任一实施例所述的由终端执行的小区变更失败处理方法。
本公开的实施例还提出一种通信装置，包括：处理器；用于存储计算机程序的存储器；其中，当所述计算机程序被处理器执行时，实现上述任一实施例所述的由网络设备执行的小区变更失败处理方法。
本公开的实施例还提出一种计算机可读存储介质，用于存储计算机程序，当所述计算机程序被处理器执行时，实现上述任一实施例所述的由终端执行的小区变更失败处理方法。
本公开的实施例还提出一种计算机可读存储介质，用于存储计算机程序，当所述计算机程序被处理器执行时，实现上述任一实施例所述的由网络设备执行的小区变更失败处理方法。
如图16所示，图16是根据本公开的实施例示出的一种用于小区变更失败处理的装置1600的示意框图。装置1600可以被提供为一基站。参照图16，装置1600包括处理组件1622、无线发射/接收组件1624、天线组件1626、以及无线接口特有的信号处理部分，处理组件1622可进一步包括一个或多个处理器。处理组件1622中的其中一个处理器可以被配置为实现上述任一实施例所述的由网络设备执行的小区变更失败处理方法。
图17是根据本公开的实施例示出的一种用于小区变更失败处理的装置1700的示意框图。例如，装置1700可以是移动电话、计算机、数字广播终端、消息收发设备、游戏控制台、平板设备、医疗设备、健身设备、个人数字助理等。
参照图17，装置1700可以包括以下一个或多个组件：处理组件1702、存储器1704、电源组件1706、多媒体组件1708、音频组件1710、输入/输出(I/O)的接口1712、传感器组件1714以及通信组件1716。
处理组件1702通常控制装置1700的整体操作，诸如与显示、电话呼叫、数据通信、相机操作和记录操作相关联的操作。处理组件1702可以包括一个或多个处理器1720来执行指令，以完成上述由终端执行的小区变更失败处理方法的全部或部分步骤。此外，处理组件1702可以包括一个或多个模块，便于处理组件1702和其他组件之间的交互。例如，处理组件1702可以包括多媒体模块，以方便多媒体组件1708和处理组件1702之间的交互。
存储器1704被配置为存储各种类型的数据以支持在装置1700的操作。这些数据的示例包括用于在装置1700上操作的任何应用程序或方法的指令、联系人数据、电话簿数据、消息、图片、视频等。存储器1704可以由任何类型的易失性或非易失性存储设备或者它们的组合实现，如静态随机存取存储器(SRAM)、电可擦除可编程只读存储器(EEPROM)、可擦除可编程只读存储器(EPROM)、可编程只读存储器(PROM)，只读存储器(ROM)、磁存储器、快闪存储器、磁盘或光盘。
电源组件1706为装置1700的各种组件提供电力。电源组件1706可以包括电源管理系统，一个或多个电源，及其他与为装置1700生成、管理和分配电力相关联的组件。
多媒体组件1708包括在所述装置1700和用户之间的提供一个输出接口的屏幕。在一些实施例中，屏幕可以包括液晶显示器(LCD)和触摸面板(TP)。如果屏幕包括触摸面板，屏幕可以被实现为触摸屏，以接收来自用户的输入信号。触摸面板包括一个或多个触摸传感器以感测触摸、滑动和触摸面板上的手势。所述触摸传感器可以不仅感测触摸或滑动动作的边界，而且还检测与所述触摸或滑动操作相关的持续时间和压力。在一些实施例中，多媒体组件1708包括一个前置摄像头和/或后置摄像头。当装置1700处于操作模式，如拍摄模式或视频模式时，前置摄像头和/或后置摄像头可以接收外部的多媒体数据。每个前置摄像头和后置摄像头可以是一个固定的光学透镜系统或具有焦距和光学变焦能力。
音频组件1710被配置为输出和/或输入音频信号。例如，音频组件1710包括一个麦克风(MIC)，当装置1700处于操作模式，如呼叫模式、记录模式和语音识别模式时，麦克风被配置为接收外部音频信号。所接收的音频信号可以被进一步存储在存储器1704或经由通信组件1716 发送。在一些实施例中，音频组件1710还包括一个扬声器，用于输出音频信号。
I/O接口1712为处理组件1702和外围接口模块之间提供接口，上述外围接口模块可以是键盘、点击轮、按钮等。这些按钮可包括但不限于：主页按钮、音量按钮、启动按钮和锁定按钮。
传感器组件1714包括一个或多个传感器，用于为装置1700提供各个方面的状态评估。例如，传感器组件1714可以检测到装置1700的打开/关闭状态，组件的相对定位，例如所述组件为装置1700的显示器和小键盘，传感器组件1714还可以检测装置1700或装置1700一个组件的位置改变，用户与装置1700接触的存在或不存在，装置1700方位或加速/减速和装置1700的温度变化。传感器组件1714可以包括接近传感器，被配置用来在没有任何的物理接触时检测附近物体的存在。传感器组件1714还可以包括光传感器，如CMOS或CCD图像传感器，用于在成像应用中使用。在一些实施例中，该传感器组件1714还可以包括加速度传感器、陀螺仪传感器、磁传感器、压力传感器或温度传感器。
通信组件1716被配置为便于装置1700和其他设备之间有线或无线方式的通信。装置1700可以接入基于通信标准的无线网络，如WiFi、2G、3G、4G LTE、5G NR或它们的组合。在一个示例性实施例中，通信组件1716经由广播信道接收来自外部广播管理系统的广播信号或广播相关信息。在一个示例性实施例中，所述通信组件1716还包括近场通信(NFC)模块，以促进短程通信。例如，在NFC模块可基于射频识别(RFID)技术、红外数据协会(IrDA)技术、超宽带(UWB)技术、蓝牙(BT)技术和其他技术来实现。
在示例性实施例中，装置1700可以被一个或多个应用专用集成电路(ASIC)、数字信号处理器(DSP)、数字信号处理设备(DSPD)、可编程逻辑器件(PLD)、现场可编程门阵列(FPGA)、控制器、微控制器、微处理器或其他电子元件实现，用于执行上述由终端执行的小区变更失败处理方法。
在示例性实施例中，还提供了一种包括指令的非临时性计算机可读存储介质，例如包括指令的存储器1704，上述指令可由装置1700的处理器1720执行以完成上述由终端执行的小区变更失败处理方法。例如，所述非临时性计算机可读存储介质可以是ROM、随机存取存储器(RAM)、CD-ROM、磁带、软盘和光数据存储设备等。
本领域技术人员在考虑说明书及实践这里公开的公开后，将容易想到本公开的其它实施方案。本公开旨在涵盖本公开的任何变型、用途或者适应性变化，这些变型、用途或者适应性变化遵循本公开的一般性原理并包括本公开未公开的本技术领域中的公知常识或惯用技术手段。说明书和实施例仅被视为示例性的，本公开的真正范围和精神由下面的权利要求指出。
应当理解的是，本公开并不局限于上面已经描述并在附图中示出的精确结构，并且可以在不脱离其范围进行各种修改和改变。本公开的范围仅由所附的权利要求来限制。
需要说明的是，在本文中，诸如第一和第二等之类的关系术语仅仅用来将一个实体或者操作与另一个实体或操作区分开来，而不一定要求或者暗示这些实体或操作之间存在任何这种实际的关系或者顺序。术语“包括”、“包含”或者其任何其他变体意在涵盖非排他性的包含，从而使得包括一系列要素的过程、方法、物品或者设备不仅包括那些要素，而且还包括没有明确列出的其他要素，或者是还包括为这种过程、方法、物品或者设备所固有的要素。在没有更多限制的情况下，由语句“包括一个……”限定的要素，并不排除在包括所述要素的过程、方法、物品或者设备中还存在另外的相同要素。
以上对本公开实施例所提供的方法和装置进行了详细介绍，本文中应用了具体个例对本公开的原理及实施方式进行了阐述，以上实施例的说明只是用于帮助理解本公开的方法及其核心思想；同时，对于本领域的一般技术人员，依据本公开的思想，在具体实施方式及应用范围上均会有改变之处，综上所述，本说明书内容不应理解为对本公开的限制。

Claims (42)

  1. 一种小区变更失败处理方法，其特征在于，由终端执行，所述方法包括：
    确定至少一个小区变更失败；
    进行连接恢复。
  2. 根据权利要求1所述的方法，其特征在于，所述确定至少一个小区变更失败包括：
    在与至少一个小区变更相关联的定时器超时时，确定至少一个小区变更失败。
  3. 根据权利要求2所述的方法，其特征在于，触发所述定时器开始计时的事件包括以下至少之一：
    接收到所述至少一个小区中第一小区发送的变更命令；
    向所述第一小区发送所述变更命令的反馈；
    确定满足触发所述至少一个小区变更的条件；
    释放所述至少一个小区中的主小区。
  4. 根据权利要求2所述的方法，其特征在于，在至少一个小区变更为基于随机接入的变更的情况下，触发所述定时器结束计时的事件包括：
    向目标小区发起的随机接入成功。
  5. 根据权利要求2所述的方法，其特征在于，在至少一个小区变更为非基于随机接入的变更的情况下，触发所述定时器结束计时的事件包括以下至少之一：
    接收到目标小区发送的下行传输；
    接收到目标小区发送的用于调度新传的下行控制信息；
    接收到指示接入成功的反馈信息。
  6. 根据权利要求5所述的方法，其特征在于，所述反馈信息包括以下至少之一：
    无线资源控制层信令；
    媒体接入控制层信令；
    物理层信令。
  7. 根据权利要求1至6中任一项所述的方法，其特征在于，所述进行连接恢复包括：
    在存在辅小区组的情况下，向所述辅小区组发送至少一个小区变更失败信息；
    根据所述辅小区组的控制进行连接恢复。
  8. 根据权利要求7所述的方法，其特征在于，所述进行连接恢复还包括：
    在不存在辅小区组的情况下，进行小区选择，通过选择的小区进行无线资源控制重建以恢复连接。
  9. 根据权利要求1至6中任一项所述的方法，其特征在于，所述进行连接恢复包括：
    通过源小区进行连接恢复。
  10. 根据权利要求9所述的方法，其特征在于，所述通过源小区进行连接恢复包括：
    向所述源小区发送至少一个小区变更失败信息；
    接入所述源小区。
  11. 根据权利要求10所述的方法，其特征在于，所述进行连接恢复还包括：
    在接入所述源小区失败的情况下，进行小区选择，通过选择的小区进行无线资源控制重建以恢复连接。
  12. 根据权利要求1至6中任一项所述的方法，其特征在于，所述方法还包括：
    对预先确定的多个小区进行评估；
    确定满足评估条件的小区；
    其中，所述进行连接恢复包括：
    通过所述满足评估条件的小区进行连接恢复。
  13. 根据权利要求12所述的方法，其特征在于，所述预先确定的多个小区包括以下至少之一：
    源小区；
    预先预配置了无线资源控制参数的候选小区。
  14. 根据权利要求12所述的方法，其特征在于，所述进行连接恢复还包括：
    在不存在满足评估条件的小区的情况下，进行小区选择，通过选择的小区进行无线资源控制重建以恢复连接。
  15. 根据权利要求1至6中任一项所述的方法，其特征在于，所述进行连接恢复包括：
    确定网络设备所指示的用于连接恢复的小区；
    通过所述用于连接恢复的小区进行连接恢复。
  16. 根据权利要求15所述的方法，其特征在于，所述进行连接恢复还包括：
    在通过所述用于连接恢复的小区进行连接恢复失败时，进行小区选择，通过选择的小区进行无线资源控制重建以恢复连接。
  17. 根据权利要求1至6中任一项所述的方法，其特征在于，所述进行连接恢复包括：
    进行小区选择，通过选择的小区进行无线资源控制重建以恢复连接。
  18. 根据权利要求17所述的方法，其特征在于，所述通过选择的小区进行无线资源控制重建以恢复连接包括：
    在选择的小区为预先预配置了无线资源控制参数的候选小区的情况下，根据所述无线资源控制参数在所述候选小区上进行连接恢复。
  19. 根据权利要求17所述的方法，其特征在于，所述通过选择的小区进行无线资源控制重建以恢复连接包括：
    基于网络设备的指示，根据配置给源小区的无线资源控制参数在选择的小区上进行连接恢复。
  20. 根据权利要求1至6中任一项所述的方法，其特征在于，所述至少一个小区包括以下至少之一：
    主小区组；
    主小区；
    主小区和至少一个辅小区。
  21. 一种小区变更失败处理方法，其特征在于，由网络设备执行，所述方法包括：
    在终端进行至少一个小区变更失败的情况下，与所述终端进行连接恢复。
  22. 根据权利要求21所述的方法，其特征在于，所述与所述终端进行连接恢复包括：
    在为所述终端配置了辅小区组的情况下，通过所述辅小区组接收所述终端发送的至少一个小区变更失败信息；
    通过所述辅小区组控制所述终端进行连接恢复。
  23. 根据权利要求22所述的方法，其特征在于，所述与所述终端进行连接恢复还包括：
    在没有为所述终端配置辅小区组或者为所述终端配置的辅小区组不可用的情况下，通过所述终端选择的小区进行无线资源控制重建以恢复连接。
  24. 根据权利要求21所述的方法，其特征在于，所述与所述终端进行连接恢复包括：
    保持源小区与所述终端的连接，通过所述源小区与所述终端进行连接恢复。
  25. 根据权利要求24所述的方法，其特征在于，所述通过源小区与所述终端进行连接恢复包括：
    通过所述源小区接收所述终端发送的至少一个小区变更失败信息。
  26. 根据权利要求25所述的方法，其特征在于，所述与所述终端进行连接恢复还包括：
    在所述终端接入所述源小区失败的情况下，通过所述终端选择的小区进行无线资源控制重建以恢复连接。
  27. 根据权利要求21所述的方法，其特征在于，所述与所述终端进行连接恢复包括：
    通过所述终端对预先确定的多个小区进行评估确定的满足评估条件的小区进行连接恢复。
  28. 根据权利要求27所述的方法，其特征在于，所述预先确定的多个小区包括以下至少之一：
    源小区；
    预先预配置了无线资源控制参数的候选小区。
  29. 根据权利要求27所述的方法，其特征在于，所述与所述终端进行连接恢复还包括：
    在不存在满足评估条件的小区的情况下，通过所述终端选择的小区进行无线资源控制重建以恢复连接。
  30. 根据权利要求21所述的方法，其特征在于，所述与所述终端进行连接恢复包括：
    向所述终端发送至少一个小区变更的命令，所述命令用于指示的用于连接恢复的小区；
    通过所述用于连接恢复的小区与所述终端进行连接恢复。
  31. 根据权利要求30所述的方法，其特征在于，所述与所述终端进行连接恢复还包括：
    在通过所述用于连接恢复的小区与所述终端进行连接恢复失败时，通过所述终端选择的小区进行无线资源控制重建以恢复连接。
  32. 根据权利要求21所述的方法，其特征在于，所述与所述终端进行连接恢复包括：
    通过所述终端选择的小区进行无线资源控制重建以恢复连接。
  33. 根据权利要求32所述的方法，其特征在于，所述通过所述终端选择的小区进行无线资源控制重建包括：
    在所述终端选择的小区为预先预配置了无线资源控制参数的候选小区的情况下，根据所述无 线资源控制参数在所述候选小区上与所述终端进行连接恢复。
  34. 根据权利要求32所述的方法，其特征在于，所述通过所述终端选择的小区进行无线资源控制重建包括：
    指示所述终端根据配置给源小区的无线资源控制参数在选择的小区上进行连接恢复；
    根据配置给源小区的无线资源控制参数在选择的小区上与所述终端进行连接恢复。
  35. 根据权利要求21至34中任一项所述的方法，其特征在于，所述至少一个小区包括以下至少之一：
    主小区组；
    主小区；
    主小区和至少一个辅小区。
  36. 一种小区变更失败处理装置，其特征在于，所述装置包括：
    处理模块，被配置为确定至少一个小区变更失败；
    连接模块，被配置为进行连接恢复。
  37. 一种小区变更失败处理装置，其特征在于，所述装置包括：
    连接模块，被配置为在终端进行至少一个小区变更失败的情况下，与所述终端进行连接恢复。
  38. 一种小区变更失败处理系统，其特征在于，包括终端、网络设备，其中所述终端被配置为实现权利要求1至20中任一项所述的小区变更失败处理方法，所述网络设备被配置为实现权利要求21至35中任一项所述的小区变更失败处理方法。
  39. 一种通信装置，其特征在于，包括：
    处理器；
    用于存储计算机程序的存储器；
    其中，当所述计算机程序被处理器执行时，实现权利要求1至20中任一项所述的小区变更失败处理方法。
  40. 一种通信装置，其特征在于，包括：
    处理器；
    用于存储计算机程序的存储器；
    其中，当所述计算机程序被处理器执行时，实现权利要求21至35中任一项所述的小区变更失败处理方法。
  41. 一种计算机可读存储介质，用于存储计算机程序，其特征在于，当所述计算机程序被处理器执行时，实现权利要求1至20中任一项所述的小区变更失败处理方法。
  42. 一种计算机可读存储介质，用于存储计算机程序，其特征在于，当所述计算机程序被处理器执行时，实现权利要求22至35中任一项所述的小区变更失败处理方法。
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