WO2020164365A1 - 信息传输的方法及装置 - Google Patents

信息传输的方法及装置 Download PDF

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Publication number
WO2020164365A1
WO2020164365A1 PCT/CN2020/072645 CN2020072645W WO2020164365A1 WO 2020164365 A1 WO2020164365 A1 WO 2020164365A1 CN 2020072645 W CN2020072645 W CN 2020072645W WO 2020164365 A1 WO2020164365 A1 WO 2020164365A1
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WO
WIPO (PCT)
Prior art keywords
cell
terminal device
information
target cell
handover
Prior art date
Application number
PCT/CN2020/072645
Other languages
English (en)
French (fr)
Inventor
严乐
耿婷婷
张宏平
曾清海
石小丽
Original Assignee
华为技术有限公司
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 华为技术有限公司 filed Critical 华为技术有限公司
Priority to JP2021547518A priority Critical patent/JP2022520966A/ja
Priority to KR1020217028494A priority patent/KR102645505B1/ko
Priority to EP20756354.5A priority patent/EP3917213A4/en
Publication of WO2020164365A1 publication Critical patent/WO2020164365A1/zh
Priority to US17/401,129 priority patent/US12035188B2/en
Priority to JP2023134845A priority patent/JP2023166438A/ja
Priority to US18/750,640 priority patent/US20240349139A1/en

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W24/00—Supervisory, monitoring or testing arrangements
    • H04W24/10—Scheduling measurement reports ; Arrangements for measurement reports
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/0005—Control or signalling for completing the hand-off
    • H04W36/0083—Determination of parameters used for hand-off, e.g. generation or modification of neighbour cell lists
    • H04W36/00837—Determination of triggering parameters for hand-off
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/0005—Control or signalling for completing the hand-off
    • H04W36/0055—Transmission or use of information for re-establishing the radio link
    • H04W36/0072—Transmission or use of information for re-establishing the radio link of resource information of target access point
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/0005—Control or signalling for completing the hand-off
    • H04W36/0055—Transmission or use of information for re-establishing the radio link
    • H04W36/0077—Transmission or use of information for re-establishing the radio link of access information of target access point
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/0005—Control or signalling for completing the hand-off
    • H04W36/0055—Transmission or use of information for re-establishing the radio link
    • H04W36/0079—Transmission or use of information for re-establishing the radio link in case of hand-off failure or rejection
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/0005—Control or signalling for completing the hand-off
    • H04W36/0083—Determination of parameters used for hand-off, e.g. generation or modification of neighbour cell lists
    • H04W36/00838—Resource reservation for handover
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/34—Reselection control
    • H04W36/36—Reselection control by user or terminal equipment
    • H04W36/362—Conditional handover
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/20—Manipulation of established connections
    • H04W76/27—Transitions between radio resource control [RRC] states

Definitions

  • This application relates to the field of communications, and in particular to methods and devices for information transmission.
  • the mobility management of the connected terminal device is controlled by the network device, that is, the network device sends a handover message to instruct the terminal device to switch to which cell and how to switch.
  • a traditional handover mechanism may include that the source network device (that is, the network device to which the source cell belongs) sends a handover message to the terminal device to control the terminal device to switch from the source cell to the target cell.
  • the handover message is a radio resource control (radio resource control, RRC) message.
  • RRC radio resource control
  • the RRC message may be an RRC reconfiguration message carrying synchronization reconfiguration information element (reconfiguration with sync) or may be a message carrying mobility control information. Yuan (mobility control info) RRC connection reconfiguration message.
  • the terminal device After receiving the handover message, the terminal device accesses the target cell according to the content contained in the handover message. Therefore, the successful transmission of the handover message is a necessary condition to ensure successful handover under the traditional handover mechanism.
  • LTE long-term evolution
  • 5G fifth-generation mobile communication technology
  • the rapid attenuation of channel quality, or the rapid movement of terminal equipment, and The occlusion of the object, or the long duration of measurement and handover preparation, etc. will cause the handover message to fail to be sent, which will lead to the handover failure and reduce the handover success rate.
  • the prior art proposes a conditional handover (CHO) mechanism to improve the handover success rate, that is, the source network device sends configuration information for conditional handover to the terminal device when the source link quality is good, and the configuration information includes The handover trigger condition configured by the network device for the terminal device and the information of one or more candidate cells corresponding to the handover trigger condition.
  • the terminal device judges whether each candidate cell meets the handover trigger condition according to the configuration information, and uses a candidate cell that meets the handover trigger condition as the target cell to switch to the target cell.
  • the source network device sends the configuration information for conditional switching to the terminal device when the source link communication quality is good, so the success rate of sending the configuration information is guaranteed, and the terminal device chooses according to the configuration information.
  • the target cell is handed over, which can improve the success rate of handover.
  • handover-related parameters are always one of the key factors that directly affect the success rate of handover.
  • a mobility robustness optimization (MRO) mechanism is introduced, that is, the terminal device sends the relevant information in the process of the mobile failure to the network device, and the network device then reports the information reported by the terminal device.
  • MRO mobility robustness optimization
  • the terminal device Under the existing MRO mechanism, the terminal device generally records the relevant information during the movement failure process in the following two scenarios, and sends it to the network device: 1The terminal device fails to receive the handover message, and the radio link failure (radio link failure, RLF) occurs ); 2The terminal device successfully receives the handover message, but fails to access the target cell or RLF occurs soon after successfully accessing the target cell.
  • RLF radio link failure
  • the MRO mechanism in the existing traditional switching mechanism is not suitable for the optimization of the switching parameters under the CHO mechanism. Therefore, there is no good mechanism for timely and accurate conditional switching. Optimization of switching parameters under the mechanism.
  • the embodiments of the present application provide a method, device, and system for information transmission, which can solve the optimization problem of switching parameters under the conditional switching mechanism.
  • the terminal device receives conditional handover configuration information, the conditional handover configuration information includes handover trigger conditions and information about M candidate cells, where M is a positive integer; the terminal device sends the first failure reason value corresponding to the candidate target cell, and /Or, the second failure cause value corresponding to the pending cell; wherein the candidate target cell includes X cells satisfying the above handover triggering condition among the M candidate cells, and the pending cell includes the M candidate cells not satisfying the above handover triggering condition X and Y are natural numbers, and X+Y is less than or equal to M.
  • the terminal device can send the first failure reason value corresponding to the candidate target cell under the conditional handover mechanism, and/or the second failure reason value corresponding to the undetermined cell, therefore, the network side can use the above failure reason value Optimize the switching parameters. Therefore, based on the solution provided by the embodiment of the present application, the optimization problem of the switching parameters under the conditional switching mechanism can be solved.
  • the terminal device may also send the information of the source cell, the information of the candidate target cell, the first time information corresponding to each cell in the candidate target cell, the information of the pending cell, and the information of the pending cell.
  • One or more items of the second time information corresponding to each cell Since in the embodiment of this application, the terminal device can send one or more of the above information under the conditional switching mechanism, the network side can optimize the switching parameters more comprehensively according to the different information reported by the terminal device, so as to make subsequent configuration candidates In the cell, the configured handover parameters are more reasonable.
  • the terminal device may also send the information of the first target cell, the third cause value corresponding to the first target cell, and the third time information.
  • the first target cell is a cell in which the terminal device successfully accesses among the M candidate cells. Since in the embodiment of this application, the terminal device also sends related information when the conditional handover is successful, when configuring candidate cells in the subsequent CHO process, the cell on which the conditional handover is successfully performed can be configured as a candidate cell first, so that the network side configuration The condition of switching configuration information is more reasonable.
  • the network side can know that the traditional handover process is not triggered or the traditional handover is configured on the network side However, the traditional handover process performed by the terminal device according to the traditional handover message is not successful. Furthermore, the network side can perform the traditional handover process and/or the related information during the conditional handover process according to the relevant information when the conditional switch is successful reported by the terminal device The adjustment of the parameters enables the network side to trigger the traditional handover process after the conditional handover process is triggered, thereby improving system reliability.
  • the terminal device may also receive an RRC reconfiguration message before the first target cell is successfully accessed.
  • the RRC reconfiguration message is used to instruct the terminal device to perform traditional handover.
  • the RRC reconfiguration message Includes information about the second target cell.
  • the terminal device accesses the second target cell according to the RRC reconfiguration message; or, the terminal device may determine that the RRC reconfiguration message is not received.
  • the terminal device can receive an RRC reconfiguration message for instructing the terminal device to perform a traditional handover before the conditional handover is successful, and perform the traditional handover according to the RRC reconfiguration message, therefore, on the one hand, conditional handover is realized
  • the mechanism serves as a supplementary mechanism to the traditional handover mechanism; on the other hand, conditional handover can be continued when the traditional handover fails, which can make up for the shortcomings of the traditional handover and improve the handover success rate.
  • the first network device sends conditional handover configuration information to the terminal device.
  • the conditional handover configuration information includes handover trigger conditions and information about M candidate cells, where M is a positive integer; the first network device receives information from the second network device.
  • the first failure reason value corresponding to the candidate target cell, and/or the second failure reason value corresponding to the pending cell, where the candidate target cell includes the M candidate cells that meet the handover triggering condition and the terminal device accesses
  • the failed X cells, and the pending cells include Y cells that do not meet the handover triggering condition among the M candidate cells, X and Y are natural numbers, and X+Y is less than or equal to M.
  • the first network device may also receive one or more of the following information from the second network device: information about the source cell, information about the candidate target cell, and the candidate target The first time information corresponding to each cell in the cell, the information of the pending cell, and the second time information corresponding to each cell in the pending cell.
  • the first network device may also receive one or more of the following information from the second network device: the information of the first target cell, the third corresponding to the first target cell The cause value and the third time information, where the first target cell is a cell in which the terminal device successfully accesses among the M candidate cells.
  • the first network device may perform conditional switching based on the received first failure cause value, and/or, the second failure cause value, and one or more of the other information. Optimization of switching parameters under the mechanism.
  • the first network device receives the first failure reason value, and/or, after the second failure reason value, the first network device subsequently configures candidate cells, for example, the next time or subsequent In the CHO process, you can exclude a candidate target cell, that is, no longer configure the candidate target cell as a candidate cell, so that the terminal device does not need to judge whether the candidate target cell meets the handover trigger when the next or subsequent conditional handover Condition, reduce the energy consumption of the terminal device and the implementation complexity of the terminal device; or, if the event A3 is configured in the condition switching configuration information, the parameter Q is configured for the A3 event as an example, when the first network device subsequently configures the switching trigger condition , You can change the value of the configured parameter Q.
  • the network device can delete the relevant information received from the terminal device corresponding to the cell where the conditional handover failed. , Discard or ignore, and no longer adjust the relevant parameters in the handover trigger condition corresponding to the cell where the conditional handover fails.
  • the second target cell may no longer be configured as the candidate cell or the target cell when the candidate cell is subsequently configured; Or, in the subsequent traditional handover process, the first network device can adjust the parameters of the related events in the measurement configuration. For example, if the A3 event is configured in the measurement configuration, and the offset P is configured for the A3 event, the first network device The value of P can be changed to achieve the purpose of optimization.
  • the second network device receives the first failure reason value corresponding to the candidate target cell from the terminal device, and/or the second failure reason value corresponding to the undetermined cell, where the candidate target cell includes M candidate cells Among the X cells that meet the handover trigger condition and the terminal device fails to access, the pending cells include Y cells out of the above M candidate cells that do not meet the handover trigger condition, X and Y are natural numbers, and X+Y is less than or equal to M, the M candidate cells and the handover trigger condition are configured through conditional handover configuration information; the second network device sends the first failure reason value to the first network device, and/or the second failure reason value.
  • the technical effects brought about by the third aspect can be referred to the technical effects brought about by the above-mentioned first aspect, which will not be repeated here.
  • the second network device may also receive one or more of the following information from the terminal device, and send one or more of the following information to the first network device: source Cell information, candidate target cell information, first time information corresponding to each cell in the candidate target cell, information about the pending cell, and second time information corresponding to each cell in the pending cell.
  • the second network device may also receive one or more of the following information from the terminal device, and send one or more of the following information to the first network device: Information about a target cell, a third cause value corresponding to the first target cell, and third time information, where the first target cell is a cell in which the terminal device successfully accesses among the M candidate cells.
  • the second network device may perform conditional switching based on the received first failure cause value, and/or, the second failure cause value, and one or more of the above other information Optimization of switching parameters under the mechanism.
  • the method for the second network device to optimize the switching parameters under the conditional switching mechanism can refer to the method used by the first network device described above, which will not be repeated here.
  • a method of information transmission and a corresponding communication device are provided.
  • the first network device sends conditional handover configuration information to the terminal device.
  • the conditional handover configuration information includes handover trigger conditions and information about M candidate cells, where M is a positive integer;
  • the second network device receives the candidate from the terminal device The first failure reason value corresponding to the target cell, and/or the second failure reason value corresponding to the cell to be determined, the second network device sends the first failure reason value to the first network device, and/or, The second failure reason value.
  • the candidate target cells include X cells that meet the handover trigger condition and the terminal device fails to access among the above M candidate cells, and the pending cells include Y of the above M candidate cells that do not meet the handover trigger condition.
  • X and Y are natural numbers, and X+Y is less than or equal to M.
  • the technical effects brought about by the fourth aspect can refer to the technical effects brought about by the above-mentioned first aspect, which will not be repeated here.
  • the first failure cause value indicates that the candidate target cell satisfies the handover trigger condition, but the terminal device is connected to the candidate target cell.
  • the above-mentioned first failure reason value includes a first-level failure reason value and a second-level failure reason value
  • the first-level failure reason value indicates that the terminal device has failed to switch conditions
  • the second-level failure reason value indicates the The candidate target cell meets the handover trigger condition, but the terminal device fails to access the candidate target cell.
  • the second failure reason value indicates that the pending cell does not meet the handover trigger condition; or, the second failure reason value includes The third-level failure reason value and the fourth-level failure reason value, the third-level failure reason value indicates that the terminal device has a conditional handover failure, and the fourth-level failure reason value indicates that the pending cell does not meet the handover trigger condition.
  • the above-mentioned first time information includes: from the moment when the terminal device receives the above-mentioned conditional switching configuration information to when the terminal device triggers the switching to the first Information on the time interval between the moments of the candidate target cell, information on the time interval from the moment when the terminal device triggers handover to the first candidate target cell to the moment when the terminal device fails to access the first candidate target cell, And the time interval information from the moment when the terminal device fails to access the first candidate target cell to the moment when the terminal device sends the first failure cause value, and/or the second failure cause value, the first A candidate target cell is any one of the candidate target cells.
  • the second time information includes: from the moment when the terminal device receives the conditional handover configuration information to when the terminal device determines the first pending cell Information on the time interval between the moments when the handover trigger condition is not met, and from the moment when the terminal device determines that the first pending cell does not satisfy the handover trigger condition to the terminal device sending the first failure cause value, and/or, the above The time interval information between the moments of the second failure cause value, the first pending cell is any one of the pending cells; or, the second time information includes: the moment when the above-mentioned conditional handover configuration information is received from the terminal device Information about the time interval between the time when the terminal device stops evaluating whether the first pending cell meets the handover trigger condition, and from the moment when the terminal device stops evaluating whether the first pending cell meets the handover trigger condition, to the terminal device Sending the first failure cause value and/or the time interval information between the moments of the second failure cause value.
  • the third cause value indicates that the terminal device successfully performs the conditional switch.
  • the third time information includes: from the moment when the terminal device receives the conditional switching configuration information to when the terminal device triggers the switching to the first aspect The time interval information between the moments of a target cell, the time interval information from the moment when the terminal device triggers handover to the first target cell to the moment when the terminal device successfully accesses the first target cell, and from Between the time when the terminal device successfully accesses the first target cell and the time when the terminal device sends one or more of the information of the first target cell, the third cause value, and the third time information Time interval information.
  • a communication device for implementing the above-mentioned various methods.
  • the communication device may be the terminal device in the foregoing first aspect, or a device including the foregoing terminal device; or, the communication device may be the first network device in the foregoing second aspect, or a device including the first network device; Alternatively, the communication device may be the second network device in the third aspect described above, or a device including the second network device described above.
  • the communication device includes a module, unit, or means corresponding to the foregoing method, and the module, unit, or means can be implemented by hardware, software, or hardware execution of corresponding software.
  • the hardware or software includes one or more modules or units corresponding to the above-mentioned functions.
  • a communication device including: a processor and a memory; the memory is used to store computer instructions, and when the processor executes the instructions, the communication device executes the method described in any of the above aspects.
  • the communication device may be the terminal device in the foregoing first aspect, or a device including the foregoing terminal device; or, the communication device may be the first network device in the foregoing second aspect, or a device including the first network device; Alternatively, the communication device may be the second network device in the third aspect described above, or a device including the second network device described above.
  • a communication device including: a processor; the processor is configured to couple with a memory, and after reading an instruction in the memory, execute the method according to any of the foregoing aspects according to the instruction.
  • the communication device may be the terminal device in the foregoing first aspect, or a device including the foregoing terminal device; or, the communication device may be the first network device in the foregoing second aspect, or a device including the first network device; Alternatively, the communication device may be the second network device in the third aspect described above, or a device including the second network device described above.
  • a computer-readable storage medium stores instructions that, when run on a computer, enable the computer to execute the method described in any of the above aspects.
  • a computer program product containing instructions which when running on a computer, enables the computer to execute the method described in any of the above aspects.
  • a communication device for example, the communication device may be a chip or a chip system
  • the communication device includes a processor for implementing the functions involved in any of the above aspects.
  • the communication device further includes a memory for storing necessary program instructions and data.
  • the communication device is a chip system, it may be composed of chips, or may include chips and other discrete devices.
  • the technical effects brought about by any of the design methods of the fifth aspect to the tenth aspect can be referred to the technical effects brought about by different design methods in the first aspect or the second aspect or the third aspect or the fourth aspect. I won't repeat them here.
  • An eleventh aspect provides a communication system, which may include the first network device and the second network device described in the fifth to tenth aspects.
  • a twelfth aspect provides a communication system, which may include the first network device, the second network device, and the terminal device described in the fifth aspect to the tenth aspect.
  • FIG. 1 is a schematic structural diagram of a communication system provided by an embodiment of this application.
  • FIG. 2 is a schematic structural diagram of a terminal device and a network device provided by an embodiment of the application;
  • FIG. 3 is a schematic structural diagram of another communication system provided by an embodiment of this application.
  • FIG. 4 is a schematic structural diagram of another terminal device and network device provided by an embodiment of this application.
  • FIG. 5 is a schematic diagram of another structure of a terminal device provided by an embodiment of the application.
  • FIG. 6 is a schematic flowchart of a method for information transmission provided by an embodiment of this application.
  • FIG. 7 is a schematic diagram of another structure of a terminal device provided by an embodiment of this application.
  • FIG. 8 is another schematic structural diagram of the first network device provided by an embodiment of this application.
  • FIG. 9 is another schematic structural diagram of the second network device provided by an embodiment of this application.
  • At least one item (a) refers to any combination of these items, including any combination of a single item (a) or plural items (a).
  • at least one item (a) of a, b, or c can mean: a, b, c, ab, ac, bc, or abc, where a, b, and c can be single or multiple .
  • words such as “first” and “second” are used to distinguish the same items or similar items with substantially the same function and effect. Those skilled in the art can understand that words such as “first” and “second” do not limit the quantity and order of execution, and words such as “first” and “second” do not limit the difference.
  • the communication system 10 includes a terminal device, a first network device, and a second network device.
  • the first network device sends conditional switching configuration information to the terminal device, where the conditional switching configuration
  • the information includes candidate cell information and handover trigger conditions; after receiving the conditional handover configuration information and performing conditional handover, the terminal device sends to the second network device the first failure reason value corresponding to the candidate target cell during the conditional handover process, and/or, The second failure cause value corresponding to the undetermined cell, where the candidate target cell is a candidate cell that meets the handover triggering condition, and the undetermined cell is a candidate cell that does not meet the handover triggering condition.
  • the second network device After receiving the first failure reason value from the network device, and/or the second failure reason value, the second network device sends the first failure reason value and/or the second failure reason value to the first network device. Therefore, the first network device or the second network device can optimize the handover parameter according to the above failure cause value. Therefore, based on the solution provided by the embodiment of the present application, the optimization problem of the switching parameters under the conditional switching mechanism can be solved.
  • FIG. 2 a schematic diagram of the structure of the first network device, the second network device, and the terminal device provided in this embodiment of the application.
  • the terminal device includes at least one processor (in FIG. 2 exemplarily includes a processor 401 as an example for illustration) and at least one transceiver (in FIG. 2 exemplarily includes a transceiver 403 as an example for illustration) .
  • the terminal device may also include at least one memory (in FIG. 2 exemplarily includes a memory 402 for illustration), at least one output device (in FIG. 2 exemplarily, an output device 404 is included as an example. Description) and at least one input device (in FIG. 2 exemplarily, an input device 405 is included as an example for description).
  • the processor 401, the memory 402, and the transceiver 403 are connected through a communication line.
  • the communication line may include a path to transmit information between the aforementioned components.
  • the processor 401 may be a general-purpose central processing unit (central processing unit, CPU), a microprocessor, an application-specific integrated circuit (ASIC), or one or more integrated circuits for controlling the execution of the program of the application Circuit.
  • CPU central processing unit
  • ASIC application-specific integrated circuit
  • the processor 401 may also include multiple CPUs, and the processor 401 may be a single-CPU processor or a multi-CPU processor.
  • the processor here may refer to one or more devices, circuits, or processing cores for processing data (for example, computer program instructions).
  • the memory 402 may be a device having a storage function. For example, it can be read-only memory (ROM) or other types of static storage devices that can store static information and instructions, random access memory (RAM), or other types that can store information and instructions Dynamic storage devices can also be electrically erasable programmable read-only memory (EEPROM), compact disc read-only memory (CD-ROM), or other optical disk storage, optical disc storage ( Including compact discs, laser discs, optical discs, digital universal discs, Blu-ray discs, etc.), magnetic disk storage media or other magnetic storage devices, or can be used to carry or store desired program codes in the form of instructions or data structures and can be stored by a computer Any other media taken, but not limited to this.
  • the memory 402 may exist independently and is connected to the processor 401 through a communication line.
  • the memory 402 may also be integrated with the processor 401.
  • the memory 402 is used to store computer execution instructions for executing the solution of the present application, and the processor 401 controls the execution.
  • the processor 401 is configured to execute computer-executable instructions stored in the memory 402, so as to implement the information transmission method described in the embodiment of the present application.
  • the computer execution instructions in the embodiments of the present application may also be referred to as application program codes or computer program codes, which are not specifically limited in the embodiments of the present application.
  • the transceiver 403 can use any device such as a transceiver to communicate with other devices or communication networks, such as Ethernet, radio access network (RAN), or wireless local area networks (WLAN) Wait.
  • the transceiver 403 includes a transmitter (transmitter, Tx) and a receiver (receiver, Rx). Among them, the transceiver can also be an input/output interface.
  • the output device 404 communicates with the processor 401 and can display information in a variety of ways.
  • the output device 404 may be a liquid crystal display (LCD), a light emitting diode (LED) display device, a cathode ray tube (CRT) display device, or a projector (projector) Wait.
  • LCD liquid crystal display
  • LED light emitting diode
  • CRT cathode ray tube
  • projector projector
  • the input device 405 communicates with the processor 401 and can accept user input in a variety of ways.
  • the input device 405 may be a mouse, a keyboard, a touch screen device, or a sensor device.
  • the first network device includes one or more processors (in FIG. 2 exemplarily includes a processor 301a as an example for illustration), at least one transceiver (in FIG. 2 exemplarily includes a transceiver 303a as an example. Description) and at least one network interface (in FIG. 2 exemplarily, a network interface 304a is included for illustration).
  • the first network device may further include at least one memory (in FIG. 2 exemplarily, including a memory 302a is used as an example for description).
  • the processor 301a, the memory 302a, the transceiver 303a and the network interface 304a are connected through a communication line.
  • the network interface 304a is used to connect to the core network device (not shown in FIG. 2) through a link (such as the S1 interface), or to connect to the network interface of other network equipment through a wired or wireless link (such as the X2 interface).
  • the application embodiment does not specifically limit this.
  • the related description of the processor 301a, the memory 302a, and the transceiver 303a can refer to the description of the processor 401, the memory 402, and the transceiver 403 in the terminal device, which will not be repeated here.
  • the second network device includes one or more processors (in FIG. 2 exemplarily includes a processor 301b as an example for illustration), at least one transceiver (in FIG. 2 exemplarily includes a transceiver 303b as an example. Description) and at least one network interface (in FIG. 2 exemplarily, a network interface 304b is included for illustration).
  • the second network device may further include at least one memory (in FIG. 2 exemplarily, a memory 302b is included for illustration).
  • the processor 301b, the memory 302b, the transceiver 303b and the network interface 304b are connected through a communication line.
  • the network interface 304b is used to connect to the core network device (not shown in FIG.
  • a communication system 30 provided in an embodiment of this application.
  • the communication system includes a network device and a terminal device connected to the network device.
  • the network device may be connected to multiple terminal devices, which is not specifically limited in the present invention.
  • the network device sends conditional handover configuration information to the terminal device, where the conditional handover configuration information includes candidate cell information and handover trigger Condition:
  • the terminal device After receiving the conditional switching configuration information and performing the conditional switching, the terminal device sends to the network device the first failure reason value corresponding to the candidate target cell during the conditional switching process, and/or the second failure reason value corresponding to the pending cell, where ,
  • the candidate target cell is a candidate cell that meets the handover trigger condition
  • the pending cell is a candidate cell that does not meet the handover trigger condition. Therefore, the network device can optimize the handover parameters according to the above failure cause value. Therefore, based on the solution provided by the embodiment of the present application, the optimization problem of the switching parameters under the conditional switching mechanism can be solved.
  • FIG. 4 it is a schematic diagram of the structure of a network device and a terminal device provided by an embodiment of this application.
  • the structural schematic diagram of the terminal device please refer to the structural schematic diagram of the terminal device shown in FIG. 2, which will not be repeated here.
  • the network device includes at least one processor (in FIG. 4 exemplarily includes a processor 301 as an example), at least one transceiver (in FIG. 4 exemplarily includes a transceiver 303 as an example for illustration), and at least One network interface (in FIG. 4, a network interface 304 is included as an example for illustration).
  • the network device may further include at least one memory (in FIG. 4, one memory 302 is included as an example for illustration).
  • the processor 301, the memory 302, the transceiver 303, and the network interface 304 are connected through a communication line.
  • the network interface 304 is used to connect to the core network device through a link (for example, the S1 interface), or to connect with the network interface of other network devices (not shown in FIG.
  • the relevant description of the processor 301, the memory 302, and the transceiver 303 can refer to the description of the processor 401, the memory 402, and the transceiver 403 in the terminal device, which will not be repeated here.
  • the network equipment including the aforementioned first network equipment or second network equipment
  • terminal equipment in the embodiments of the present application may also be referred to as communication devices, which may be a general-purpose equipment or a special-purpose equipment. There is no specific restriction on this.
  • the network device in the embodiment of the present application is a device that connects a terminal device to a wireless network, and may be an evolved base station in an LTE system ( evolutional Node B, eNB or eNodeB); or base station in 5G network or public land mobile network (PLMN), broadband network service gateway (BNG), aggregation switch or non-third party 3rd generation partnership project (3rd generation partnership project, 3GPP) access equipment, etc., this embodiment of the application does not specifically limit this.
  • the base stations in the embodiments of the present application may include various forms of base stations, such as macro base stations, micro base stations (also called small stations), relay stations, access points, etc., which are not specifically limited in the embodiments of the present application .
  • the terminal device in the embodiment of the present application may be a device used to implement a wireless communication function, such as a terminal or a chip that can be used in a terminal.
  • the terminal may be a user equipment (UE), an access terminal, a terminal unit, a terminal station, a mobile station, a mobile station, a remote station, a remote terminal, a mobile device, and wireless communication in a 5G network or a future evolved PLMN.
  • the access terminal can be a cellular phone, a cordless phone, a session initiation protocol (SIP) phone, a wireless local loop (WLL) station, a personal digital assistant (PDA), with wireless communication Functional handheld devices, computing devices or other processing devices connected to wireless modems, vehicle-mounted devices or wearable devices, virtual reality (VR) terminal devices, augmented reality (AR) terminal devices, industrial control (industrial) Wireless terminal in control), wireless terminal in self-driving (self-driving), wireless terminal in remote medical, wireless terminal in smart grid, wireless terminal in transportation safety (transportation safety) Terminal, wireless terminal in smart city, wireless terminal in smart home, etc.
  • the terminal can be mobile or fixed.
  • FIG. 5 is a specific structural form of the terminal device provided in an embodiment of the application.
  • the functions of the processor 401 in FIG. 2 or FIG. 4 may be implemented by the processor 110 in FIG. 5.
  • the function of the transceiver 403 in FIG. 2 or FIG. 4 may be implemented by the antenna 1, antenna 2, mobile communication module 150, wireless communication module 160, etc. in FIG. 5.
  • antenna 1 and antenna 2 are used to transmit and receive electromagnetic wave signals.
  • Each antenna in the terminal device can be used to cover a single or multiple communication frequency bands. Different antennas can also be reused to improve antenna utilization.
  • antenna 1 can be multiplexed as a diversity antenna of a wireless local area network.
  • the antenna can be used in combination with a tuning switch.
  • the mobile communication module 150 can provide wireless communication solutions including 2G/3G/4G/5G, etc., which are applied to terminal devices.
  • the mobile communication module 150 may include at least one filter, switch, power amplifier, low noise amplifier (LNA), etc.
  • LNA low noise amplifier
  • the mobile communication module 150 can receive electromagnetic waves by the antenna 1, and perform processing such as filtering and amplifying the received electromagnetic waves, and then transmitting them to the modem processor for demodulation.
  • the mobile communication module 150 can also amplify the signal modulated by the modem processor, and convert it into electromagnetic waves for radiation via the antenna 1.
  • at least part of the functional modules of the mobile communication module 150 may be provided in the processor 110.
  • at least part of the functional modules of the mobile communication module 150 and at least part of the modules of the processor 110 may be provided in the same device.
  • the wireless communication module 160 can provide applications on terminal devices including wireless local area networks (WLAN) (such as Wi-Fi networks), Bluetooth (bluetooth, BT), global navigation satellite system (global navigation satellite system, GNSS). ), frequency modulation (FM), near field communication (NFC), infrared technology (infrared, IR) and other wireless communication solutions.
  • WLAN wireless local area networks
  • Bluetooth blue, BT
  • global navigation satellite system global navigation satellite system
  • GNSS global navigation satellite system
  • FM frequency modulation
  • NFC near field communication
  • infrared technology infrared, IR
  • the wireless communication module 160 may be one or more devices integrating at least one communication processing module.
  • the wireless communication module 160 receives electromagnetic waves via the antenna 2, frequency modulates and filters the electromagnetic wave signals, and sends the processed signals to the processor 110.
  • the wireless communication module 160 can also receive the signal to be sent from the processor 110, perform frequency modulation, amplify it, and convert it into electromagnetic wave radiation via the antenna 2.
  • the wireless communication module 160 can provide a solution for NFC wireless communication applied to the terminal device, which means that the first device includes an NFC chip.
  • the NFC chip can improve the NFC wireless communication function.
  • the wireless communication module 160 can provide a NFC wireless communication solution applied to the terminal device, which means that the first device includes an electronic tag (such as a radio frequency identification (RFID) tag).
  • RFID radio frequency identification
  • the antenna 1 of the terminal device is coupled with the mobile communication module 150, and the antenna 2 is coupled with the wireless communication module 160, so that the terminal device can communicate with the network and other devices through wireless communication technology.
  • the wireless communication technologies may include global system for mobile communications (GSM), general packet radio service (GPRS), code division multiple access (CDMA), broadband Code division multiple access (wideband code division multiple access, WCDMA), time-division code division multiple access (TD-SCDMA), long term evolution (LTE), BT, GNSS, WLAN, NFC , FM, or IR technology, etc.
  • the GNSS may include global positioning system (GPS), global navigation satellite system (GLONASS), Beidou navigation satellite system (BDS), quasi-zenith satellite system (quasi -zenith satellite system, QZSS) or satellite-based augmentation systems (SBAS).
  • GPS global positioning system
  • GLONASS global navigation satellite system
  • BDS Beidou navigation satellite system
  • QZSS quasi-zenith satellite system
  • SBAS satellite-based augmentation systems
  • the function of the memory 402 in FIG. 2 or FIG. 4 may be implemented by the internal memory 121 in FIG. 5 or an external memory (such as a Micro SD card) connected to the external memory interface 120.
  • an external memory such as a Micro SD card
  • the function of the output device 404 in FIG. 2 or FIG. 4 may be implemented through the display screen 194 in FIG. 5.
  • the display screen 194 is used to display images, videos, and so on.
  • the display screen 194 includes a display panel.
  • the function of the input device 405 in FIG. 2 or FIG. 4 may be implemented by a mouse, a keyboard, a touch screen device, or the sensor module 180 in FIG. 5.
  • the sensor module 180 may include, for example, a pressure sensor 180A, a gyroscope sensor 180B, an air pressure sensor 180C, a magnetic sensor 180D, an acceleration sensor 180E, a distance sensor 180F, a proximity light sensor 180G, and a fingerprint sensor 180H.
  • a pressure sensor 180A a pressure sensor 180A
  • a gyroscope sensor 180B an air pressure sensor 180C
  • a magnetic sensor 180D e.g., a MEMS acceleration sensor 180E
  • a distance sensor 180F e.g., a distance sensor 180F
  • a proximity light sensor 180G e.g., a a proximity light sensor 180G
  • a fingerprint sensor 180H e.g., a fingerprint sensor 180H.
  • the terminal device may also include an audio module 170, a camera 193, an indicator 192, a motor 191, a button 190, a SIM card interface 195, a USB interface 130, a charging management module 140, and a power supply.
  • an audio module 170 can be connected to a speaker 170A (also called a "speaker"), a receiver 170B (also called a “handset"), and a microphone 170C (also called a "microphone", Microphone”) or earphone interface 170D, etc., which are not specifically limited in the embodiment of the present application.
  • the structure shown in FIG. 5 does not constitute a specific limitation on the terminal device.
  • the terminal device may include more or fewer components than shown in the figure, or combine certain components, or split certain components, or arrange different components.
  • the illustrated components can be implemented in hardware, software, or a combination of software and hardware.
  • the following takes the interaction between the first network device, the second network device, and the terminal device shown in FIG. 1 as an example to explain the information transmission method provided in the embodiment of the present application.
  • the information transmission method includes the following:
  • the first network device sends message 1 to the terminal device.
  • the message 1 may include conditional handover configuration information, and the conditional handover configuration information includes a handover trigger condition and information of M candidate cells.
  • the first network device may be referred to as the source network device, that is, the first network device is the network device to which the source cell belongs, and M is a positive integer, that is, the message 1 may include information about one or more candidate cells. It is understandable that the handover trigger condition and the information of the M candidate cells may be sent in the same message or in different messages, which is not limited in the embodiment of the present application.
  • conditional handover configuration information may also include information required for the terminal device to perform random access when accessing any one or several of the M candidate cells.
  • the terminal device may perform random access based on this information.
  • the candidate cell initiates non-competitive access.
  • the terminal device can determine whether any one of the M candidate cells meets the handover trigger condition according to the conditional handover configuration information contained in the message 1, and then can determine at least one candidate The target cell, and/or, at least one pending cell.
  • the candidate target cell includes X cells that meet the handover trigger condition and the terminal device fails to access among the M candidate cells
  • the pending cell includes Y cells that do not meet the handover trigger condition among the M candidate cells, and X is less than or Any natural number equal to M, Y is any natural number less than or equal to M, and X+Y less than or equal to M.
  • access failure refers to the failure of a terminal device to access a certain cell, for example, a random access procedure performed by the terminal device in a certain cell fails; or, access failure It means that RLF occurs in a cell after a terminal device is successfully connected. For example, the terminal device has a random access in a cell, but RLF occurs in the cell within a predetermined time after the terminal device is successfully connected. RLF occurs X seconds after entering a certain cell. X may be specified by the protocol or configured by the network, which is not specifically limited in this application.
  • S602 The terminal device sends MRO related information to the second network device.
  • terminal equipment with relevant capabilities such as a terminal equipment capable of recording MRO-related information
  • the terminal device may send MRO related information to the second network device through an RRC message.
  • the RRC message may be a user information response UEInformationReponse message, of course, it may also be other RRC messages or other forms of messages, which are not specifically limited in this application.
  • the second network device may request or trigger the terminal device to send MRO-related information, or the terminal device itself may trigger the sending of MRO-related information (for example, the terminal device sends periodically or based on events). MRO related information), this embodiment of the application does not specifically limit this.
  • the second network device may forward it to the first network device, and the first network device can adjust the relevant parameters of the conditional switch; or, The second network device may forward the above message to the network device to which the corresponding candidate cell belongs in the MRO related information, and the network device to which the corresponding candidate cell belongs can adjust the relevant parameters of conditional switching; or, the second network device may also follow the above message For example, when the corresponding candidate cell included in the MRO information belongs to the second network device, the second network device may perform conditional switching related parameter adjustment.
  • the processing result can be sent to the first network device or the network device described in the corresponding candidate cell in the above-mentioned MRO related information.
  • corresponding processing such as optimization of conditional handover parameters
  • the second network device After the second network device receives the message including MRO related information from the terminal device, if it is determined to forward the message to the first network device, S603 is executed.
  • S603 The second network device sends MRO related information to the first network device.
  • the second network device and the first network device may be the same network device.
  • S603 does not need to be performed; or, the second network device and the first network device may be different networks Device, at this time, S603 needs to be executed.
  • the MRO related information in the embodiment of the present application includes the first failure reason value corresponding to the candidate target cell, and/or the second failure reason value corresponding to the pending cell.
  • the MRO-related information in this embodiment of the application includes the first failure cause value corresponding to the candidate target cell; or, if there is a pending cell and no candidate target cell exists, this
  • the MRO-related information in the application embodiment includes the second failure reason value corresponding to the pending cell; or, if there are candidate target cells and the pending cell, the MRO-related information in the embodiment of the application includes the first failure reason corresponding to the candidate target cell Value and the second failure reason value corresponding to the pending cell.
  • the first failure cause value indicates that the candidate target cell meets the handover trigger condition, but the terminal device fails to access the candidate target cell.
  • the first failure reason value includes two-level reason values, for example, the first-level failure reason value and the second-level failure reason value, the first-level failure reason value indicates that the terminal device has failed to switch conditions, and the second-level failure reason value indicates The candidate target cell meets the handover trigger condition, but the terminal device fails to access the candidate target cell.
  • one possible way of expression is to introduce a new cause value to indicate that the candidate target cell meets the handover trigger condition, but the terminal device is connected to the candidate target cell. Entry failed.
  • the second-level failure reason value may be triggered by a condition but the access failure (such as ConditionTriggerButAccessFailure) is indicated, or the second-level failure reason value may be expressed in other forms, which is not specifically limited in the embodiment of the application.
  • Another possible expression is to reuse the existing handover failure (HOF) cause value or RLF cause value.
  • the existing HOF can be reused, that is, the HOF cause value can be redefined to indicate that a certain cell meets the handover trigger condition, but the terminal device fails to access the cell.
  • the correspondence between the candidate target cell and the first failure cause value may be that each candidate target cell corresponds to a first failure cause value; or, multiple candidate target cells correspond to the same first failure cause value.
  • Failure reason value may be that take the source cell as cell A, and the conditional handover configuration information includes three candidate cells, namely, cell B, cell C, and cell D. Among them, cell B, cell C, and cell D are all meeting the handover trigger conditions.
  • Candidate target cell, and the terminal device fails to access in cell B, cell C, and cell D the corresponding relationship between the candidate target cell and the first failure cause value may be: cell B corresponds to the first failure cause value 1, and cell C corresponds to The first failure reason value is 2, cell D corresponds to the first failure reason value 3; or, cell B and cell C jointly correspond to the first failure reason value 4, and cell D corresponds to the first failure reason value 5; or, cell B, cell C Corresponding to the first failure reason value 6 together with cell D.
  • the second failure reason value indicates that the pending cell does not meet the handover trigger condition; or, the second failure reason value includes two-level reason values, for example, the third-level failure reason value and the fourth-level failure
  • the cause value, the third level failure cause value indicates that the terminal device has failed conditional handover, and the fourth level failure cause value indicates that the pending cell does not meet the handover trigger condition.
  • the fourth-level failure cause value one possible way of expressing it is to introduce a new cause value to indicate that the pending cell does not meet the handover trigger condition, for example, the fourth-level failure cause
  • the value can be represented by a condition that is not satisfied (for example, ConditionNotTrigger), or the fourth-level failure cause value can be represented in other forms, which is not specifically limited in the embodiment of the present application.
  • Another possible way of expression is to reuse the existing HOF cause value or RLF cause value.
  • RLF can be reused, that is, the RLF cause value can be redefined to indicate that the cell does not meet the handover trigger condition.
  • the correspondence between the pending cell and the second failure cause value may be that each pending cell corresponds to a second failure cause value; or, multiple pending cells correspond to the same second failure cause value .
  • the specific correspondence relationship is similar to the correspondence relationship between the candidate target cell and the first failure cause value. For related description, please refer to the description of the correspondence relationship between the candidate target cell and the first failure cause value, which will not be repeated here.
  • the MRO-related information further includes first information, where the first information includes one or more of the following information: information about the source cell, information about the candidate target cell, and candidate target cell The first time information corresponding to each cell in each cell, the information of the pending cell, and the second time information corresponding to each cell in the pending cell.
  • the information of the source cell includes the cell identification information of the source cell, and/or the cell signal quality information of the source cell
  • the information of the candidate target cell includes the cell identification information of the candidate target cell, and/or the cell signal of the candidate target cell Quality information
  • the information of the pending cell includes the cell identification information of the pending cell, and/or the cell signal quality information of the pending cell.
  • the cell identification information may include PCI and frequency information corresponding to the cell, and/or the cell global identification CGI.
  • the PCI and the frequency information corresponding to the cell may be used as the identity of the cell, or the CGI may be used as the identity of the cell. logo.
  • the frequency information includes one or more of the following: the absolute frequency of the synchronization signal block SSB (such as absoluteFrequencySSB), the absolute frequency position of the reference resource module (common RB0) (such as absoluteFrequencyPointA), the frequency bandwidth list (such as frequencyBandList), and the subcarrier Interval (such as subcarrier spacing, SCS), SCS specific carrier list (such as scs-SpecificCarrierList); cell signal quality information includes the cell’s reference signal received power (RSRP), and/or, reference signal received quality ( reference signal received quality, RSRQ).
  • the signal quality of the cell may also include the rate of change of the signal quality of the cell.
  • the first time information includes: time interval information from the moment when the terminal device receives the conditional switching configuration information to the moment when the terminal device triggers the handover to the first candidate target cell, Information on the time interval between the moment when the terminal device triggers handover to the first candidate target cell to the moment when the terminal device fails to access the first candidate target cell, and the moment when the terminal device fails to access the first candidate target cell Information about the time interval between the time when the terminal device sends the first failure cause value corresponding to the first candidate target cell (or from the moment when the terminal device fails to access the first candidate target cell to the terminal device sends the above Time interval information between moments of the first information), where the first candidate target cell is any one of the candidate target cells.
  • the moment when the handover to the first candidate target cell is triggered refers to the moment when the terminal device determines that the first candidate target cell satisfies the handover trigger condition; or, the moment when the handover to the first candidate target cell is triggered refers to At the moment when the terminal device initiates access to the first candidate target cell, the access may be non-competitive access or competitive access.
  • the moment of triggering handover to the first candidate target cell refers to the moment when the terminal device initiates access to the first candidate target cell, the moment when the terminal device initiates random access to the first candidate target cell, for example, the terminal device initiates random access to the first candidate target cell.
  • the first time information includes: time interval information from the moment when the terminal device receives the conditional handover configuration information to the moment when the terminal device triggers the handover to the first candidate target cell, Information about the time interval between the moment when the terminal device triggers handover to the first candidate target cell and the moment when the terminal device sends the first failure cause value corresponding to the first candidate target cell (or, from the terminal device triggers handover to The time interval information between the time of the first candidate target cell and the time when the terminal device sends the first information).
  • the first time information includes: time interval information from the moment when the terminal device receives the conditional switching configuration information to the moment when the terminal device fails to access the first candidate target cell, And the time interval information from the moment when the terminal device fails to access the first candidate target cell to the moment when the terminal device sends the first failure cause value corresponding to the first candidate target cell (or, from the terminal device in Information on the time interval between the time when the access of the first candidate target cell fails to the time when the terminal device sends the above-mentioned first information).
  • the first time information is the time between the time when the terminal device receives the conditional switching configuration information and the time when the terminal device sends the first failure cause value corresponding to the first candidate target cell
  • the second time information includes: time interval information from the moment when the terminal device receives the conditional handover configuration information to the moment when the terminal device determines that the first pending cell does not meet the handover trigger condition , And the time interval information from the moment when the terminal device determines that the first pending cell does not meet the handover trigger condition to the moment when the terminal device sends the second failure cause value corresponding to the first pending cell (or from the terminal device Determining the time interval information between the moment when the first pending cell does not meet the handover trigger condition and the moment when the terminal device sends the above-mentioned first information), where the first pending cell is any one of the pending cells;
  • the second time information includes: the time from the moment when the terminal device receives the conditional handover configuration information to the moment when the terminal device stops evaluating whether the first pending cell meets the handover trigger condition Interval information, the time interval information from the moment when the terminal device stops evaluating whether the first pending cell meets the handover trigger condition to the moment when the terminal device sends the second failure cause value corresponding to the first pending cell (or, Information on the time interval from the time when the terminal device stops evaluating whether the first pending cell meets the handover trigger condition to the time when the terminal device sends the above-mentioned first information).
  • the time when the terminal device mentioned in the second time information stops evaluating whether the first pending cell meets the handover trigger condition is when the terminal device uses the "polling method" to determine the first pending cell. The moment when the handover trigger condition is met.
  • the second time information is the time between the time when the terminal device receives the conditional switching configuration information and the time when the terminal device sends the second failure cause value corresponding to the first pending cell
  • the time interval information or the second time information is the time interval information from the time when the terminal device receives the conditional switching configuration information to the time when the terminal device sends the above-mentioned first information.
  • the above-mentioned first information may also include the information of the cell that the terminal device has successfully accessed after it currently receives the conditional handover configuration information, that is, the information that ultimately provides service to the terminal device during this round of CHO process
  • the cell information or it can also be understood that the above-mentioned successfully accessed cell information is the information of the cell that finally exists (or establishes, or maintains) an RRC connection with the terminal device in this round of CHO process.
  • the information of the cell includes cell identification information, and/or cell signal quality information, cell identification information and cell signal quality information related descriptions can refer to the above description of cell identification information and cell signal quality information, which will not be repeated here. Repeat.
  • the terminal device determines that cell C meets the handover trigger condition and the terminal device is in cell C according to the conditional handover configuration information.
  • the terminal device can record the information of cell C; or, in another example, the terminal device determines that none of the configured M candidate cells meet the handover trigger condition according to the currently received conditional switching configuration information, or, The terminal device fails to access all the candidate target cells in the configured M candidate cells, or, if there are other situations, the terminal device initiates the re-establishment process, and the re-establishment is successful, the terminal device can record the information of the re-established cell (such as , The terminal device performs the RRC re-establishment process with cell E, and the re-establishment is successful in cell E, the terminal device can record the information of cell E), where the re-established cell can be one of the above M candidate cells, or It is a cell other than the M candidate cells.
  • the terminal device judges that none of the configured M candidate cells satisfy the handover trigger condition according to the currently received conditional switching configuration information, or the terminal device is in all candidate targets of the configured M candidate cells All cells fail to access, or there are other conditions.
  • the signal quality of the source cell is still good, and the terminal device and the source cell (or source network device) still maintain an RRC connection, and the terminal device can record the source cell information , That is, the terminal equipment can record the information of cell A.
  • a cell consists of one downlink carrier and one uplink carrier.
  • terminal equipment at the edge of the cell can receive network equipment (such as base stations)
  • network equipment such as base stations
  • the network cannot receive the signal from the terminal equipment, that is, there is a problem of asymmetrical uplink and downlink coverage.
  • another low-frequency frequency band such as the LTE frequency band
  • SUL supplementary uplink
  • terminal equipment has two uplinks (uplink). , UL) carrier frequency spectrum for uplink transmission.
  • a cell that supports SUL configuration has one downlink carrier and two uplink carriers. In order to distinguish the two uplink carriers, one is called a SUL carrier, and the other is called a normal uplink (NUL) carrier.
  • SUL carrier In order to distinguish the two uplink carriers, one is called a SUL carrier, and the other is called a normal uplink (NUL) carrier.
  • NUL normal uplink
  • the foregoing first information may also include that the terminal device is in the candidate target cell.
  • the UL carrier information (such as NUL or SUL) used when the access fails to indicate whether the terminal device has failed in the NUL or SUL access of the candidate target cell; or the terminal device may not explicitly send the carrier information, for example .
  • the protocol stipulates that when the terminal device does not send carrier information, the NUL access of the terminal device in the candidate target cell by default or the SUL access failure in the candidate target cell by default is not specified in this application.
  • the MRO-related information further includes second information, which is related information of the cell when the terminal device successfully performs conditional handover, wherein the second information includes one of the following information or Multiple:
  • the cell that ultimately serves the terminal device in the current round of CHO process is a cell that meets the handover trigger condition and the terminal device is successfully connected to the candidate cells (or it can be understood that in this round of CHO process, the execution condition handover is successful Cell)
  • the information of the cell that ultimately serves the terminal device in the current round of CHO process recorded by the terminal equipment and the information of the first target cell in the current round of CHO process recorded by the terminal equipment are the same information, in order to avoid Storage overhead, the terminal device may only record one of the two copies of the same information, or it may be understood that the second information may not include the information of the first target cell or the first information may not include the current round of CHO process Information about the cell that ultimately serves the terminal device.
  • the third cause value corresponding to the first target cell indicates that the terminal device successfully performs the conditional handover.
  • the third time information includes: time interval information from the moment when the terminal device receives the conditional handover configuration information to the moment when the terminal device triggers the handover to the first target cell, and from the moment when the terminal device triggers the handover to the first target cell.
  • the moment when the handover to the first target cell is triggered refers to the moment when the terminal device determines that the first target cell satisfies the handover trigger condition; or, the moment when the handoff to the first target cell is triggered refers to the moment when the terminal device When the first target cell initiates access, the access may be non-competitive access or competitive access.
  • the moment when the handover to the first candidate target cell is triggered refers to the moment when the terminal device initiates access to the first candidate target cell, the moment when the terminal device initiates random access to the first candidate target cell, for example, the terminal device initiates random access to the first candidate target cell.
  • the third time information corresponding to the first target cell includes: the time between the time when the terminal device receives the conditional handover configuration information and the time when the terminal device successfully accesses the first target cell Time interval information, and the time interval information from the moment when the terminal device successfully accesses the first target cell to the moment when the terminal device sends the third cause value corresponding to the first target cell (or, Information about the time interval between the time when the target cell is successfully accessed to the time when the terminal device sends the first information; or, from the time when the terminal device successfully accesses the first target cell to the time when the terminal device sends the second information Time interval between).
  • the third time information corresponding to the first target cell includes: the time from the moment when the terminal device receives the conditional handover configuration information to the moment when the terminal device triggers the handover to the first target cell Interval information, the time interval information from the moment when the terminal device triggers handover to the first target cell to the moment when the terminal device sends the third cause value corresponding to the first target cell (or, when the terminal device triggers handover to the first target cell) Information about the time interval between the time of the cell and the time when the terminal device sends the above-mentioned first information; or, the time interval from the moment when the terminal device successfully accesses the first target cell to the time when the terminal device sends the above second information ).
  • the third time information corresponding to the first target cell is the time interval information from the moment when the terminal device receives the conditional handover configuration information to the moment when the terminal device sends the third cause value corresponding to the first target cell (or ,
  • the third time information corresponding to the first target cell is the time interval information from the time when the terminal device receives the conditional switching configuration information to the time when the terminal device sends the first information; or, the slave terminal device is in the first target The time interval between the time when the cell access is successful and the time when the terminal device sends the above-mentioned second information).
  • the conditional switching mechanism can be used as a supplementary technology to the traditional switching mechanism, that is, the source network device (ie, the first network device) provides the terminal with good source link quality.
  • the device sends the conditional switching configuration information, and subsequently, the source network device can also send a switching message to the terminal device according to the existing traditional switching mechanism (in the embodiment of this application, the switching message sent to the terminal device according to the traditional switching mechanism may be referred to as traditional Handover message)
  • the traditional handover message in the NR system may be an RRC reconfiguration message containing a synchronization reconfiguration cell, or the traditional handover message in an LTE system may be an RRC connection reconfiguration message containing a mobile control cell.
  • the traditional handover message includes related information of the second target cell.
  • the related information of the second target cell includes the cell identification information of the second target cell, the C-RNTI allocated by the second target cell to the terminal device, and the second target cell association
  • the traditional handover message may be an RRC reconfiguration message carrying a synchronization reconfiguration cell or an RRC connection reconfiguration message carrying a mobility control cell, which is not specifically limited in this application.
  • the terminal device judges whether the candidate cell meets the handover trigger condition. If it has not been determined yet Before the cell that meets the handover trigger condition or the cell that meets the handover trigger condition is determined but has not successfully accessed to the cell, the terminal device receives the traditional handover message. At this time, the terminal device can try to access according to the traditional handover message To the second target cell. If the terminal device successfully accesses the second target cell, optionally, the terminal device can discard/delete the conditional switching configuration information. If the terminal device fails to access the second target cell, the terminal device can continue to switch the configuration according to the condition The information is conditionally switched.
  • conditional handover mechanism When the conditional handover mechanism is used as a supplementary technology to the traditional handover mechanism, there is also a possible scenario 2, that is, after the terminal device receives the conditional handover configuration information, it determines the cell that meets the handover triggering condition and successfully switches to the cell That is to say, the source network device did not send a traditional handover message to the terminal device before the terminal device successfully switched to the cell that satisfies the handover trigger condition; or the source network device sent a traditional handover message to the terminal device but the terminal device did not receive the source network In this traditional switching message sent by the device, at this time, the terminal device can perform conditional switching according to the above-mentioned conditional switching configuration information.
  • the terminal device does not receive the traditional handover message is that the quality of the source link is poor.
  • the source network device does not send the traditional handover message to the terminal device is that the handover preparation process between the source network device and the determined network device to which the second target cell belongs fails or takes too long, causing the network to be too late
  • the traditional handover process is configured or not configured, and the embodiment of the present application does not specifically limit this.
  • the above-mentioned MRO-related information may also include third information, that is, information about handover failure, or information about traditional handover failure.
  • the third information may include one or more of the following: information about the source cell, the second target cell , The fourth failure reason value, the fourth time information, and the first indication information, the first indication information indicates that the terminal device has received the handover message.
  • the information of the second target cell includes cell identification information of the second target cell, and/or cell signal quality information of the second target cell.
  • the fourth failure reason value indicates that the terminal device fails to perform traditional handover or fails to access the second target cell.
  • the fourth failure reason value may be HOF, that is, to reuse the existing failure reason value HOF, indicating that the traditional handover fails or
  • the access failure in the second target cell is not specifically limited in this application.
  • the fourth time information includes: time interval information from the moment when the terminal device receives the handover message to the moment when the terminal device fails to access the second target cell, and from the terminal device fails to access the second target cell Information about the time interval between the time at which the terminal device sends the third information; or, the fourth time information includes: from the time the terminal device receives the handover message to the time the terminal device sends the third information ⁇ time interval information.
  • the first indication information can be a binary value, for example, "1" indicates that the terminal device has received the handover message; or it can be a Boolean value, for example, "TRUE" indicates that the terminal device has received the handover message; or it can be a certain cell, for example,
  • the information element may be that a traditional handover message (such as HO-received) is received, or the information element may have other representation/naming methods, which are not specifically limited in the embodiment of the present application.
  • the terminal device reports this information element, it means that the terminal device has received the traditional handover message. If the terminal device does not report this information element, it means that the terminal device has not received the traditional handover message.
  • This application does not specifically limit the first indication information.
  • the terminal device can continue to switch the configuration information according to the condition received before the handover message to determine whether the candidate cell meets the handover trigger condition, and there is a candidate target cell in the candidate cell, and/ Or, when a cell is to be determined, the terminal device can record and report information related to the candidate target cell and/or the cell to be determined. For the specific description, refer to the above and will not be repeated.
  • the MRO related information may further include fourth information, that is, the related information about the handover failure.
  • the fourth information may include one or more of the following: source cell information, fifth time information, and second indication information.
  • the second indication information indicates that the terminal device has not received the handover. news.
  • the fifth time information includes: time interval information from the moment when RLF occurs between the terminal device and the source network device to the moment when the terminal device sends the fourth information.
  • the second indication information can be a binary value, for example, "0" means that the terminal device has not received the handover message; or it can be a Boolean value, for example, "FALSE" means that the terminal device has not received the handover message; or it can be a certain cell,
  • the information element may not receive a traditional handover message (such as HO-not received), or the information element may have other representation/naming methods, which are not limited.
  • the terminal device reports the cell it means that the terminal device has not received the traditional handover message. If the terminal device does not report the cell, it means that the terminal device has received the traditional handover message.
  • This application does not specifically limit the representation form of the above-mentioned second indication information.
  • the terminal device Since the terminal device does not receive the traditional handover message, the terminal device determines whether the candidate cell meets the handover trigger condition according to the received conditional switching configuration, the candidate target cell exists in the candidate cell, and/or the terminal device can record when the cell is pending And report the information related to the candidate target cell and/or the pending cell. For the specific description, refer to the above, and will not be repeated.
  • the message 1 may be an RRC reconfiguration message carrying a synchronization reconfiguration information element (reconfiguration with sync); or, the message 1 may be a newly defined RRC message, for example, the message 1 is a conditional switching message, or the The message 1 has other names; or, the message 1 may be an RRC connection reconfiguration message carrying a mobility control information element (mobility control info), which is not specifically limited in the embodiment of the present application.
  • a synchronization reconfiguration information element reconfiguration with sync
  • the message 1 may be a newly defined RRC message, for example, the message 1 is a conditional switching message, or the The message 1 has other names; or, the message 1 may be an RRC connection reconfiguration message carrying a mobility control information element (mobility control info), which is not specifically limited in the embodiment of the present application.
  • mobility control info mobility control info
  • the information of each candidate cell of the M candidate cells may include one or more of the following information: the cell identity corresponding to the candidate cell (such as PCI and the corresponding cell Frequency information, and/or cell global identity (CGI), for example, PCI and the frequency information corresponding to the cell can be used as the identity of the cell, or the CGI can be used as the identity of the cell), the candidate cell is the The cell radio network temporary identifier (C-RNTI) allocated by the terminal device, the random access channel (RACH) resource associated with the candidate cell, for example, the random access channel RACH resource may include Dedicated random access resources and/or public random access resources, where the dedicated random access resources include a preamble index and a first time-frequency resource, the public random access resources include a second time-frequency resource, and the frequency information includes the following Or multiple: the absolute frequency of the synchronization signal block SSB (such as absoluteFrequencySSB), the absolute frequency position of the reference resource module (common RB0)
  • the handover trigger condition is used for the terminal device to determine whether any one of the M candidate cells can trigger the handover.
  • the switching trigger condition is used for the terminal device to determine whether any one of the M candidate cells can trigger the handover.
  • a possible configuration of the handover trigger condition is to configure the handover trigger event as the A3 event, and configure the parameter Q for the A3 event, then when the signal quality of a certain cell among the M candidate cells is higher than the current serving cell of the terminal device When the signal quality of is higher than Q, the cell meets the handover trigger condition.
  • Q is a threshold, and its unit may be decibel (dB) or decibel milliwatt (dBm), which is not specifically limited in the embodiment of the present application.
  • another possible configuration of the handover trigger condition is to configure the handover trigger event as the A5 event, and configure the parameters K and L for the A5 event, then when the signal quality of a cell in the M candidate cells is higher than K and the terminal When the signal quality of the current serving cell of the device is lower than L, the cell meets the handover trigger condition, where the current serving cell of the terminal device refers to the serving cell when the terminal device receives the conditional handover configuration information, that is, the current serving cell of the terminal device The cell is the source cell.
  • K and L are threshold values, and the unit can be decibel (dB) or decibel milliwatt (dBm), which is not specifically limited in the embodiment of the present application.
  • the handover trigger conditions in the embodiment of the present application may correspond to each of the M candidate cells in a one-to-one correspondence, that is, the network device may configure M handover trigger conditions, and the M handover trigger conditions correspond to M The candidate cells have a one-to-one correspondence; or, the network device may configure the same handover trigger condition for multiple candidate cells, which is not specifically limited in this application.
  • the handover trigger condition 1 can be configured for cell B, and the handover trigger condition 2 can be configured for cell C, as Cell D is configured with handover trigger condition 3; alternatively, handover trigger condition 4 can be configured for cells B and C, and handover trigger condition 5 can be configured for cell D; alternatively, the same handover trigger condition 6 can be configured for cells B, C, and D.
  • the terminal device when the terminal device judges whether a cell in the candidate cell meets the handover trigger condition, it can adopt a "polling type” judgment or a "one-off” judgment.
  • “Polling” judgment means that the terminal device will repeatedly judge whether the candidate cell that has been judged meets the handover trigger condition
  • the "one-time” judgment means that the terminal device will not repeatedly judge whether the candidate cell that has been judged meets the handover trigger condition.
  • the total time for the terminal device to determine whether the candidate cell meets the handover trigger condition can be agreed upon by the protocol, or it can be sent by the network device to the terminal device (for example, the message 1 sent by the first network device to the terminal device)
  • the total duration information can be included in the, and this application does not specifically limit this).
  • the "polling-style" judgment may also have no time limit.
  • the candidate cell B and cell C are configured in the conditional handover configuration information. If the terminal device determines that cell B does not meet the handover trigger condition, it can continue to determine whether cell B meets the handover trigger condition. In this case, it is called "polling Type" judgment. Once the terminal device determines that cell B does not meet the handover trigger condition, it will no longer determine whether cell B meets the handover trigger condition, and this is a "one-off" determination.
  • the terminal device determines whether a cell in the candidate cells meets the handover trigger condition according to the conditional handover configuration information, if the terminal device fails to access a cell that meets the handover trigger condition among the configured candidate cells or the terminal device determines that the candidate cell is in the candidate cell After a cell in the candidate cell does not meet the handover trigger condition, you can continue to determine whether the cell in the candidate cell meets the handover trigger condition (at this time, the terminal device can use the "polling" judgment or the "one-time judgment".
  • the above whole process can be regarded as a round of CHO process; or, until the terminal device After judging whether all the candidate cells meet the handover trigger condition, that is, all the candidate cells have been judged by the terminal device at least once whether they meet the handover trigger condition (at this time, the terminal device can use the "polling" judgment, or use "One-time judgment", this application does not specifically limit this).
  • the above whole process can be regarded as a round of CHO process. In this round of CHO, all candidate cells may not meet the handover trigger condition or the terminal equipment may be in the candidate.
  • the terminal equipment adopts a "one-off" judgment as an example. If the terminal equipment first judges that cell B does not meet the handover trigger condition or cell B meets the handover trigger condition but the terminal device fails to access cell B, the terminal device can continue to determine whether the remaining candidate cells (for example, the terminal device can continue to determine cell C or cell D) meet the handover trigger condition, if the terminal device determines the cell If D satisfies the handover trigger condition and the terminal device successfully accesses in cell D, the terminal device no longer determines whether cell C meets the handover trigger condition.
  • candidate cell B, candidate cell C, and candidate cell D are configured in the conditional handover configuration information. If the terminal device first determines that cell B does not meet the handover trigger condition or cell B meets the handover trigger condition but the terminal device is in the cell If B access fails, the terminal device can continue to determine whether the remaining candidate cells (for example, the terminal device can continue to determine cell C or cell D) meet the handover trigger condition, if the terminal device determines that cell D meets the handover trigger condition but the terminal device is in the cell If D fails to access or cell D does not meet the handover trigger condition, the terminal device continues to determine whether cell C meets the handover trigger condition.
  • the remaining candidate cells for example, the terminal device can continue to determine cell C or cell D
  • the judgment is performed at most N times, where N can be agreed by the protocol or sent by the network device To the terminal device (for example, the message 1 sent by the first network device to the terminal device may contain the value of N, where N is an integer greater than or equal to 1).
  • the terminal device if the terminal device fails to access a cell that meets the handover trigger condition among the configured candidate cells or the terminal device determines that one of the candidate cells does not meet the handover trigger condition, the subsequent judgment can be continued , That is, determine whether the cell in the candidate cell meets the handover trigger condition (at this time, the terminal device can use the "polling" judgment or the "one-time judgment", which is not specifically limited in this application) until the following situation If any one of the situations occurs, the terminal device stops the judgment: 1) The total number of judgments made by the terminal device reaches N times; 2) Before the number of judgments reaches N times, the terminal device can determine the cell that meets the handover trigger condition, and then The cell with the handover trigger condition is successfully accessed.
  • the terminal device When N times of judgments are completed, the terminal device no longer makes judgments, and the above whole process can be regarded as a round of CHO process; or, when the total number of judgments made by the terminal device does not reach N times, the terminal device can If a cell that meets the handover trigger condition is determined, and the cell that meets the handover trigger condition is successfully accessed, the terminal device no longer makes a judgment, and the above-mentioned whole process can be regarded as a round of CHO process.
  • a cell that meets the handover trigger condition is determined, and the cell that meets the handover trigger condition is successfully accessed, the terminal device no longer makes a judgment, and the above-mentioned whole process can be regarded as a round of CHO process.
  • exemplary taking candidate cell B, candidate cell C, and candidate cell D are configured in the conditional handover configuration information, and N is 2, the terminal device adopts a "one-off" judgment as an example.
  • the terminal device when the terminal device judges whether the cell in the candidate cell meets the handover trigger condition according to the conditional switching configuration information, it performs at most R random access attempts.
  • the random access attempt refers to the terminal device according to
  • the conditional handover configuration information determines that a candidate cell satisfies the handover trigger condition
  • the terminal device performs random access with the cell and tries to access the cell: the terminal device has at most R chances of random access attempts until the terminal device finishes the judgment All candidate cells do not meet the handover trigger condition, or until the terminal device has made all R random access attempts, or, until the terminal device has not made all R random access attempts but the terminal device has successfully accessed The cell that meets the handover trigger condition.
  • R can be agreed upon by the protocol, or sent by the network device to the terminal device.
  • the message 1 sent by the first network device to the terminal device can contain the value of R, and R is an integer greater than or equal to 1, which is implemented in this application The example does not make specific restrictions on this.
  • the terminal device if the terminal device fails to access a cell that meets the handover trigger condition among the configured candidate cells or the terminal device determines that one of the candidate cells does not meet the handover trigger condition, the subsequent judgment can be continued , That is, determine whether the cell in the candidate cell meets the handover trigger condition (at this time, the terminal device can use the "polling" judgment or the "one-time judgment", which is not specifically limited in this application) until the following situation
  • the terminal device stops judging or terminates the current round of CHO process: 1) The total number of random access attempts performed by the terminal device reaches R times; 2) Before the total number of random access attempts performed reaches R times The terminal device can determine the cell that meets the handover trigger condition, and successfully access the cell that meets the handover trigger condition; 3) All the configured candidate cells do not meet the handover trigger condition.
  • the terminal device When all R random access attempts are completed, the terminal device no longer makes judgments, and the above whole process can be regarded as a round of CHO process; or, the total number of random access attempts performed by the terminal device does not reach R times. Before the number of access attempts reaches R times, the terminal device can determine the cell that meets the handover trigger condition, and if it successfully accesses the cell that meets the handover trigger condition, the terminal device no longer makes judgments.
  • the above whole process can be regarded as a round CHO process; or, the terminal device determines that all candidate cells configured by the network device do not meet the handover trigger condition, that is, the total number of random access attempts performed by the terminal device is equal to 0, although the total number of random access attempts does not reach R , But the terminal device no longer judges, the whole process mentioned above can be regarded as a round of CHO process.
  • the terminal device determines that all candidate cells configured by the network device do not meet the handover trigger condition, that is, the total number of random access attempts performed by the terminal device is equal to 0, although the total number of random access attempts does not reach R , But the terminal device no longer judges, the whole process mentioned above can be regarded as a round of CHO process.
  • R is 2
  • the terminal device adopts "one-off" judgment as an example.
  • the terminal device when the terminal device judges whether a cell in the candidate cell satisfies the handover trigger condition according to the conditional handover configuration information, it only makes the judgment within H time period after receiving the conditional handover configuration information, where H can be It is agreed upon by the protocol, and may also be sent by the network device to the terminal device (for example, the H value may be included in the message 1 sent by the first network device to the terminal device).
  • H can be It is agreed upon by the protocol
  • the network device for example, the H value may be included in the message 1 sent by the first network device to the terminal device.
  • the terminal device fails to access a cell that satisfies the handover trigger condition among the configured candidate cells or the terminal device determines that one of the candidate cells does not meet the handover trigger condition, it can handover after receiving the condition.
  • the terminal device After configuring the information, continue to make subsequent judgments to determine whether the cells in the candidate cells meet the handover trigger conditions (at this time, the terminal device can use the "polling" judgment or the "one-time judgment". This application This is not specifically limited), until the timeout or before the timeout, the terminal device can determine the cell that meets the handover trigger condition, and successfully accesses the cell that meets the handover trigger condition, then the terminal device stops the judgment.
  • the above whole process can be seen Into a round of CHO process.
  • H is 100s, and the terminal equipment adopts "one-off" judgment as an example, if the terminal equipment first judges that cell B is not satisfactory for handover If the trigger condition or cell B meets the handover trigger condition but the terminal device fails to access the cell B, the terminal device can continue to determine whether other candidate cells (for example, the terminal device can continue to determine cell C or cell D) meet the handover trigger condition in the remaining time If the terminal device can determine a cell that meets the handover trigger condition after the timeout or before the timeout, and successfully accesses the cell that meets the handover trigger condition, the terminal device stops the judgment.
  • the terminal equipment adopts "one-off" judgment as an example, if the terminal equipment first judges that cell B is not satisfactory for handover If the trigger condition or cell B meets the handover trigger condition but the terminal device fails to access the cell B, the terminal device can continue to determine whether other candidate cells (for example, the terminal device can continue to determine cell C or cell D) meet the handover trigger condition in the remaining time If the terminal device can determine a cell that meets the
  • the determination sequence of the terminal device may be regular.
  • the network device may specify the determination sequence of each candidate cell or the network device may Specify the priority of each candidate cell, and the terminal equipment judges the candidate cells according to the priority; or the agreement stipulates the order in which the terminal equipment judges the candidate cells; or the judgment order of the terminal equipment can also be irregular, for example, the judgment order
  • the embodiment of the present application does not specifically limit this.
  • the source cell is cell A
  • two candidate cells, cell B and cell C are configured in the conditional handover configuration information.
  • the terminal equipment fails to access a cell that meets the handover trigger condition among the configured candidate cells or the terminal equipment After determining that one of the candidate cells does not meet the handover trigger condition, continue to determine whether the cell in the candidate cell meets the handover trigger condition, until the terminal device determines the cell that meets the handover trigger condition, and successfully connects to the cell that meets the handover trigger condition. For example, until the terminal device has judged whether all candidate cells meet the handover trigger condition, the MRO related information recorded by the terminal device in different scenarios will be described in detail.
  • conditional handover process may exist.
  • Premise 1 After receiving the conditional handover configuration information, the terminal device can maintain data transmission with the source cell until the terminal device successfully accesses the target cell or the source cell generates RLF;
  • premise 2 The terminal device immediately disconnects the data transmission with the source cell after receiving the conditional handover configuration information.
  • the connection status of the terminal device under the two premises in a round of CHO process is explained separately.
  • Scenario 1 Cell B is a candidate target cell, and cell C is a pending cell. The terminal device failed to access the cell B.
  • the terminal device may determine that cell B meets the handover trigger condition according to the conditional handover configuration information. Furthermore, the terminal device performs a random access process with cell B, but the random access process performed by the terminal device with cell B fails; or the terminal device successfully accesses cell B and RLF occurs in cell B. In addition, the terminal device determines that the cell C does not satisfy the handover trigger condition according to the conditional handover configuration information.
  • the terminal device performs the current round of CHO process based on the currently received conditional handover configuration information. Since the terminal device fails to access cell B and cell C does not meet the handover triggering conditions, the final round of CHO process For the cell that serves the terminal device (or it can be understood that there is (or establishes, or maintains) an RRC connection with the terminal device in this round of CHO process), there may be the following four situations:
  • the terminal device fails to access the cell B and determines that the cell C does not meet the handover trigger condition, and the terminal device has RLF in the source cell A (for example, the signal quality of the source cell A deteriorates), then The terminal device initiates a re-establishment procedure, and performs an RRC re-establishment procedure with the selected appropriate new cell (such as a cell that satisfies the S criterion) D.
  • the selected appropriate new cell such as a cell that satisfies the S criterion
  • the terminal device if the terminal device fails to access cell B and determines that cell C does not meet the handover trigger condition, the terminal device initiates a re-establishment process and selects a suitable new cell (such as the one that meets the S criterion). Cell) D performs the RRC re-establishment procedure.
  • the terminal device fails to access in cell B and determines that cell C does not meet the handover trigger condition, and the signal quality of source cell A is good, the terminal device does not generate RLF in source cell A, that is, the terminal The device still maintains an RRC connection with the source cell A (or source network device).
  • the terminal device fails to access cell B and determines that cell C does not meet the handover trigger condition, the terminal device initiates re-establishment, and the appropriate cell selected by the re-establishment process is the source cell A. Then the terminal equipment and the source cell A perform an RRC re-establishment procedure.
  • the appropriate new cell D selected by the terminal device may be the same cell as the source cell A, or may be a different cell from the source cell A, which is not specifically limited in this application.
  • the suitable new cell D selected by the terminal device may be the same cell as the candidate cell (such as cell B or cell C), or may be a different cell from the candidate cell, which is not specifically limited in this application.
  • the MRO related information recorded by the terminal device includes: the first failure reason value corresponding to cell B and the second failure reason value corresponding to cell C.
  • the related description of the first failure reason value can refer to the description of the first failure reason value in the above embodiment
  • the related description of the second failure reason value can refer to the description of the second failure reason value in the above embodiment, here No longer.
  • the MRO-related information recorded by the terminal device may also include one or more of the following first information: source cell information, candidate target cell information, candidate target cell
  • the source cell is cell A
  • the candidate target cell is cell B
  • the pending cell is cell C
  • the cell that ultimately serves the terminal device or understood as the final cell in the current round of CHO process
  • the cell that exists (or establishes) an RRC connection with the terminal device is cell D, and the specific description of related information can refer to the description of the corresponding information in the foregoing embodiment, which will not be repeated here.
  • the cell that ultimately serves the terminal device (or, understood as the cell that ultimately has (or established) an RRC connection with the terminal device in this round of CHO process) is cell D, and the terminal device records
  • the MRO related information of is the same as the MRO related information recorded in the scenario 1 of the scenario 1, and the related description can refer to the description of the scenario 1 of the scenario 1, which will not be repeated here.
  • the cell that ultimately serves the terminal device (or, understood as the cell that ultimately has (or maintains) an RRC connection with the terminal device in this round of CHO process) is cell A, and the terminal device records
  • the MRO information is similar to the MRO-related information recorded in the scenario 1, except that the terminal equipment recorded in the scenario 3 in the CHO process is the source cell.
  • a information, not cell D information For related description, please refer to the description of scenario 1 above, which will not be repeated here.
  • the cell that ultimately serves the terminal device (or, understood as the cell that ultimately has (or established) an RRC connection with the terminal device in this round of CHO process) is cell A, and the terminal device records
  • the MRO information of Scenario 1 is the same as the MRO related information recorded in Scenario 3.
  • Scenario 3 For related description, please refer to the description of Scenario 3 above, which will not be repeated here.
  • Cell B is a candidate target cell.
  • the terminal device fails to access in cell B, and successfully accesses in cell C.
  • the terminal device determines that cell B meets the handover trigger condition according to the conditional handover configuration information. Furthermore, the terminal device performs a random access process with cell B, but the random access process performed by the terminal device with cell B fails; or the terminal device successfully accesses cell B and RLF occurs in cell B. In addition, if the terminal device determines that cell C meets the handover trigger condition based on the conditional switching configuration information, the terminal device performs a random access process with cell C, and the random access process between the terminal device and cell C succeeds, and the terminal device successfully switches to the cell C.
  • the MRO related information recorded by the terminal device includes: the first failure reason value corresponding to cell B.
  • the first failure reason value For the related description of the first failure reason value, reference may be made to the description of the first failure reason value in the foregoing embodiment, which will not be repeated here.
  • the MRO-related information recorded by the terminal device may also include one or more of the following information in the above-mentioned first information: information about the source cell, information about the candidate target cell, and information about the candidate target cell.
  • the source cell is cell A
  • the candidate target cell includes cell B.
  • cell C The cell (or , It is understood that the cell that finally exists (or establishes) an RRC connection with the terminal device in this round of CHO process is cell C, and the specific description of related information can refer to the description of the corresponding information in the foregoing embodiment, which will not be repeated here.
  • Scenario 3 Cell B and Cell C are candidate target cells.
  • the terminal equipment fails to access in both cell B and cell C.
  • the terminal device determines that cell B meets the handover trigger condition according to the conditional handover configuration information. Furthermore, the terminal equipment performs a random access process with cell B, but the random access process performed by the terminal equipment with cell B fails, or the terminal equipment successfully accesses cell B and RLF occurs in cell B. In addition, the terminal device determines that cell C meets the handover trigger condition according to the conditional switching configuration information, and then the terminal device performs a random access process with cell C, but the random access process between the terminal device and cell C fails; or the terminal device successfully connects After entering cell C, RLF occurs in cell B.
  • the terminal device performs the current round of CHO process based on the currently received conditional switching configuration information. Because the terminal device fails to access in both cell B and cell C, the terminal device will finally provide the terminal device in the current round of CHO process.
  • the serving cell or it can be understood as the cell that the terminal device determines that there is (or establishes or maintains) an RRC connection with the terminal device in the current round of CHO process), there may be the following four situations:
  • the terminal device if the terminal device fails to access in cell B and the terminal device fails to access in cell C, and the terminal device experiences RLF in source cell A (for example, the signal quality of source cell A deteriorates), the terminal The device initiates a re-establishment procedure, and performs an RRC re-establishment procedure with the selected appropriate new cell (such as a cell meeting the S criterion) D.
  • the selected appropriate new cell such as a cell meeting the S criterion
  • the terminal device In the case of premise 2, if the terminal device fails to access in cell B and the terminal device fails to access in cell C, the terminal device initiates a re-establishment process and selects a suitable new cell (such as a cell that meets the S criterion). ) D performs the RRC re-establishment process.
  • the terminal device does not generate RLF in source cell A, that is, the terminal device The RRC connection with the source cell A (or source network device) is still maintained. 4
  • the terminal device if the terminal device fails to access cell B and the terminal device fails to access cell C, the terminal device initiates re-establishment, and the appropriate cell selected by the re-establishment process happens to be the source cell A, Then the terminal equipment and the source cell A perform an RRC re-establishment procedure.
  • the terminal device In the case of premise 2, if the terminal device fails to access cell B and the terminal device fails to access cell C, the terminal device initiates re-establishment, and the appropriate cell selected by the re-establishment process is the source cell A, then The terminal equipment and the source cell A perform an RRC re-establishment procedure.
  • the MRO related information recorded by the terminal device includes: the first failure reason value corresponding to cell B and the first failure reason value corresponding to cell C.
  • the first failure reason value For the related description of the first failure reason value, reference may be made to the description of the first failure reason value in the foregoing embodiment, which will not be repeated here.
  • the MRO-related information recorded by the terminal device may also include one or more of the following information in the above-mentioned first information: information of the source cell, information of the candidate target cell, and candidate The first time information corresponding to each cell in the target cell, and the cell that ultimately serves the terminal device in the current round of CHO process (or, understand that there is (or established, or maintained) with the terminal device in the current round of CHO process) RRC connected cell) information, candidate target cell UL carrier information.
  • the source cell is cell A
  • the candidate target cells include cell B and cell C.
  • the cell that will ultimately serve the terminal device in the current round of CHO process (or, understood as the current round of CHO process)
  • the cell in which the RRC connection with the terminal device is finally (or established) is cell D.
  • the cell that ultimately serves the terminal device (or, understood as the cell that ultimately has (or established) an RRC connection with the terminal device in this round of CHO process) is cell D, and the terminal device records
  • the MRO-related information of is the same as the MRO-related information recorded in the case 1 of the scenario three, and the relevant description can refer to the description of the case 1 of the scenario three, which will not be repeated here.
  • the cell that ultimately serves the terminal device (or, understood as the cell that ultimately has (or maintains) an RRC connection with the terminal device in this round of CHO process) is cell A, and the terminal device records
  • the MRO information recorded in scenario 3 is similar to the MRO related information recorded in scenario 1.
  • the difference is that the information of the cell that ultimately serves the terminal device during the current round of CHO process recorded in scenario 3 is that of source cell A Information, not cell D information.
  • scenario 1 in scenario 3 will not be repeated here.
  • the cell that ultimately serves the terminal device (or, understood as the cell that ultimately has (or established) an RRC connection with the terminal device in this round of CHO process) is cell A, and the terminal device records
  • the MRO information of Scenario 3 is the same as the MRO related information recorded in Scenario 3 above. For related description, please refer to the description of Scenario 3 above, which will not be repeated here.
  • Scenario 4 Cell B and Cell C are pending cells, that is, neither cell B nor cell C satisfy the handover trigger condition.
  • the terminal device determines that cell B does not meet the handover trigger condition according to the conditional handover configuration information, and then continues to determine whether cell C meets the handover trigger condition, and the terminal device determines that cell C does not meet the handover trigger condition.
  • the terminal device performs the current round of CHO process according to the currently received conditional handover configuration information. Since neither cell B nor cell C meets the handover triggering conditions, the terminal device will finally be served during the current round of CHO process
  • the cell or it can be understood that there is (or establishes, or maintains) an RRC connection with the terminal device in this round of CHO process), there may be the following four situations:
  • the terminal device determines that cell B does not meet the handover trigger condition and cell C does not meet the handover trigger condition, and the terminal device has RLF in the source cell A (for example, the signal quality of the source cell A deteriorates), then The terminal device initiates a re-establishment procedure, and performs an RRC re-establishment procedure with the selected appropriate new cell (such as a cell that satisfies the S criterion) D.
  • the selected appropriate new cell such as a cell that satisfies the S criterion
  • the terminal device determines that cell B does not meet the handover trigger condition and cell C does not meet the handover trigger condition, the terminal device initiates a re-establishment process, and selects a suitable new cell (such as the one that meets the S criterion).
  • Cell performs the RRC re-establishment procedure.
  • the terminal device determines that cell B does not meet the handover trigger condition and cell C does not meet the handover trigger condition, and the signal quality of the source cell A is good, the terminal device does not generate RLF in the source cell A, that is, the terminal The device still maintains an RRC connection with the source cell A (or source network device).
  • the terminal device determines that cell B does not meet the handover trigger condition and cell C does not meet the handover trigger condition, the terminal device initiates re-establishment, and the appropriate cell selected by the re-establishment process is the source cell A, Then the terminal equipment and the source cell A perform an RRC re-establishment procedure.
  • the MRO related information recorded by the terminal device includes: the second failure reason value corresponding to cell B and the second failure reason value corresponding to cell C.
  • the second failure reason value For the related description of the second failure reason value, reference may be made to the description of the second failure reason value in the foregoing embodiment, which will not be repeated here.
  • the MRO-related information recorded by the terminal device may also include one or more of the following information in the first information: information of the source cell, information of the pending cell, and pending cell
  • the second time information corresponding to each cell in the CHO process, the cell that ultimately serves the terminal device in this round of CHO process (or, understand that there is (or established, or maintained) RRC connection with the terminal device in this round of CHO process)
  • the source cell is cell A
  • the pending cells include cell B and cell C.
  • the cell (or, understand The cell that finally exists (or establishes) an RRC connection with the terminal device in this round of the CHO process is cell D, and the description of related information can refer to the description of the corresponding information in the foregoing embodiment, which is not repeated here.
  • the cell that ultimately serves the terminal device (or, understood as the cell that ultimately has (or established) an RRC connection with the terminal device in this round of CHO process) is cell D, and the terminal device records
  • the MRO-related information of is the same as the MRO-related information recorded in the scenario 1 of the scenario four, and the related description can refer to the description of the scenario 1 of the foregoing scenario four, which is not repeated here.
  • the cell that ultimately serves the terminal device (or, understood as the cell that ultimately has (or maintains) an RRC connection with the terminal device in this round of CHO process) is cell A, and the terminal device records
  • the MRO information recorded in scenario 4 is similar to the MRO related information recorded in scenario 1. The difference is that in scenario 3, the information of the cell that ultimately serves the terminal device in the current round of CHO process is recorded in source cell A. Information, not cell D information. For related description, please refer to the description of scenario 1 in scenario 4, which will not be repeated here.
  • the cell that ultimately serves the terminal device (or, understood as the cell that eventually exists (or establishes) an RRC connection with the terminal device in this round of CHO process) is cell A, and the terminal device records
  • the MRO information of Scenario 4 is the same as the MRO related information recorded in Scenario 3.
  • Scenario 3 For related description, please refer to the description of Scenario 3, which will not be repeated here.
  • the terminal device after the terminal device fails to access one of the configured candidate cells that meets the handover trigger condition or the terminal device determines that one of the candidate cells does not meet the handover trigger condition, it continues to determine the cell in the candidate cell Whether the handover trigger condition is met, until the terminal device determines a cell that meets the handover trigger condition, and successfully accesses the cell that meets the handover trigger condition, or until the terminal device determines whether all candidate cells meet the handover trigger condition.
  • the terminal device judges whether the cell in the candidate cell meets the handover trigger condition according to the conditional switching configuration information, it will judge at most N times, the specific N is 1, the source cell is cell A, and the candidate cell B is configured in the conditional switching configuration information
  • Two candidate cells and candidate cell C are taken as examples to describe in detail the MRO-related information recorded by terminal equipment in different scenarios.
  • the candidate cell it selects for judgment may be random or selected according to a preset rule, which may be stipulated by the agreement or This application does not specifically limit the configuration of network equipment.
  • Scenario 5 Cell B is a candidate target cell. The terminal device failed to access the cell B.
  • the terminal device determines that cell B meets the handover trigger condition according to the conditional handover configuration information. Furthermore, the terminal device performs a random access process with cell B, but the random access process performed by the terminal device with cell B fails; or the terminal device successfully accesses cell B and RLF occurs in cell B. At this time, since N is equal to 1, that is, the terminal device makes a judgment at most once, so the terminal device no longer judges whether the cell C meets the handover trigger condition.
  • the terminal device performs the current round of CHO process according to the currently received conditional switching configuration information. After the terminal device makes a judgment, the access in cell B fails, so the terminal device is ultimately the terminal device in this round of CHO process.
  • the serving cell or it can be understood that there is (or establishes, or maintains) an RRC connection with the terminal device in the current round of CHO process). There may be the following four situations:
  • the terminal device In the case of premise 1, if the terminal device fails to access in cell B and the terminal device experiences RLF in source cell A (for example, the signal quality of source cell A deteriorates), the terminal device initiates the re-establishment process, and the selected A suitable new cell (such as a cell meeting the S criterion) D performs an RRC re-establishment procedure.
  • RLF radio frequency
  • the terminal device if the terminal device fails to access the cell B, the terminal device initiates a re-establishment procedure, and performs an RRC re-establishment procedure with the selected appropriate new cell (such as a cell that meets the S criterion) D.
  • the selected appropriate new cell such as a cell that meets the S criterion
  • the terminal device fails to access cell B and the signal quality of source cell A is good, the terminal device does not generate RLF in source cell A, that is, the terminal device and source cell A (or source network device) RRC connection is still maintained between.
  • the terminal device fails to access cell B, the terminal device initiates re-establishment, and the appropriate cell selected by the re-establishment process is source cell A, then the terminal device and source cell A perform RRC re-establishment. Establish a process.
  • the MRO related information recorded by the terminal device includes: the first failure cause value corresponding to cell B.
  • the first failure reason value For the related description of the first failure reason value, reference may be made to the description of the first failure reason value in the foregoing embodiment, which will not be repeated here.
  • the MRO-related information recorded by the terminal device may also include one or more of the following information in the above-mentioned first information: information of the source cell, information of the candidate target cell, and candidate The first time information corresponding to each cell in the target cell, and the cell that ultimately serves the terminal device in the current round of CHO process (or, understand that there is (or established, or maintained) with the terminal device in the current round of CHO process) RRC connected cell) information, candidate target cell UL carrier information.
  • the source cell is cell A
  • the candidate target cell includes cell B
  • the cell that ultimately serves the terminal device in the current round of CHO process or, understood that it will eventually interact with
  • the cell in which the RRC connection exists (or the RRC connection is established) between the terminal devices is cell D, and the description of related information can refer to the description of the corresponding information in the foregoing embodiment, which is not repeated here.
  • the cell that ultimately serves the terminal device (or, understood as the cell that eventually exists (or establishes) an RRC connection with the terminal device in this round of CHO process) is cell D, and the terminal device records
  • the MRO-related information in the scenario 5 is the same as the MRO-related information recorded in the scenario 1, and the related description can refer to the description of the scenario 1 in the above scenario, which will not be repeated here.
  • scenario 5 the cell that ultimately serves the terminal device (or, understood as the cell that ultimately has (or maintains) an RRC connection with the terminal device in this round of CHO process) is cell A, and the terminal device records
  • the MRO information recorded in scenario 5 is similar to the MRO related information recorded in scenario 1. The difference is that in scenario 5, the information of the cell that ultimately serves the terminal device during the current round of CHO process is recorded in the case of scenario 5.
  • Information, not cell D information For related description, please refer to the description of scenario 1 in scenario 5, which will not be repeated here.
  • the cell that ultimately serves the terminal device (or, understood as the cell that ultimately exists (or establishes) an RRC connection with the terminal device in this round of CHO process) is cell A, and the terminal device records
  • the MRO information of is the same as the MRO related information recorded in the case 3 of the scenario 5, and the relevant description can refer to the description of the case 3 of the scenario 5, which will not be repeated here.
  • Cell B is a pending cell, that is, cell B does not meet the handover trigger condition.
  • the terminal device determines that cell B does not meet the handover trigger condition according to the conditional handover configuration information. At this time, since N is equal to 1, that is, the terminal device makes a judgment at most once, so the terminal device no longer judges whether cell C meets the handover trigger condition.
  • the terminal device performs the current round of CHO process according to the currently received conditional switching configuration information. After the terminal device makes a judgment and determines that cell B does not meet the handover trigger condition, the final CHO process in this round is The cell served by the terminal device (or it can be understood that there is (or established, or maintained) the RRC connection with the terminal device in the current round of CHO process), there may be the following four situations: 1In the case of premise 1 If cell B does not meet the handover trigger condition and the terminal equipment RLF occurs in the source cell A (for example, the signal quality of the source cell A deteriorates), the terminal equipment initiates a re-establishment process, and selects a suitable new cell (such as S The standard cell) D performs the RRC re-establishment procedure.
  • a suitable new cell such as S The standard cell
  • the terminal device initiates the re-establishment procedure, and performs the RRC re-establishment procedure with the selected appropriate new cell (such as the cell meeting the S criterion) D.
  • the terminal device initiates re-establishment, and the appropriate cell selected by the re-establishment process is source cell A, then the terminal device and source cell A perform RRC re-establishment Process.
  • the MRO related information recorded by the terminal device includes: the second failure reason value corresponding to cell B.
  • the second failure reason value For the related description of the second failure reason value, reference may be made to the description of the second failure reason value in the foregoing embodiment, which will not be repeated here.
  • the MRO-related information recorded by the terminal device may also include one or more of the following information in the above-mentioned first information: information of the source cell, information of the pending cell, and pending cell
  • the second time information corresponding to each cell in the CHO process, the cell that ultimately serves the terminal device in this round of CHO process (or, understand that there is (or established, or maintained) RRC connection with the terminal device in this round of CHO process)
  • the source cell is cell A
  • the pending cell is cell B.
  • the cell that ultimately serves the terminal device in this round of CHO process (or, understood as this round)
  • the cell that eventually exists (or establishes) an RRC connection with the terminal device is cell D.
  • the description of related information refer to the description of the corresponding information in the foregoing embodiment, which will not be repeated here.
  • the cell that ultimately serves the terminal device (or, understood as the cell that eventually exists (or establishes) an RRC connection with the terminal device in this round of CHO process) is cell D, and the terminal device records
  • the MRO-related information of is the same as the MRO-related information recorded in the scenario 1 of the sixth scenario.
  • the scenario 1 of the sixth scenario please refer to the description of the scenario 1 of the sixth scenario, which will not be repeated here.
  • the cell that ultimately serves the terminal device (or, understood as the cell that ultimately has (or maintains) an RRC connection with the terminal device in this round of CHO process) is cell A, and the terminal device records
  • the MRO information in the scenario 6 is similar to the MRO related information recorded in the scenario 1, the difference is that the information of the cell that ultimately serves the terminal device during the current round of CHO process recorded in the scenario 3 is that of the source cell A Information, not cell D information.
  • scenario 1 in scenario 6 which will not be repeated here.
  • the cell that ultimately serves the terminal device (or, understood as the cell that ultimately has (or established) an RRC connection with the terminal device in this round of CHO process) is cell A, and the terminal device records
  • the MRO information of is the same as the MRO-related information recorded in the situation 3 of this scenario 6, and the relevant description can refer to the description of the situation 3 of the scenario 6, which will not be repeated here.
  • the terminal device itself triggers the sending of MRO related information.
  • the terminal device can send the MRO related information recorded in the current round of CHO process to the final The network device to which the cell served by the terminal device belongs.
  • the terminal device successfully switches to the candidate cell C, then the terminal device can send the MRO related information recorded in this round of CHO process to the network device to which cell C belongs .
  • the network equipment of the cell that ultimately serves the terminal equipment in this round of the CHO process can send the MRO-related information received from the terminal equipment to the source network equipment.
  • the network equipment to which cell C belongs Send the MRO-related information received from the terminal device to the network device to which cell A belongs (that is, the source network device);
  • the terminal device when the terminal device switches the configuration information according to the received conditions and fails to switch to the candidate cell, if the terminal device initiates the re-establishment process and the re-establishment is successful, that is, the terminal device is finally provided with If the serving cell is a re-established cell, the terminal device can send the MRO-related information recorded in the current round of CHO process to the network device of the cell that ultimately serves the terminal device during the current round of CHO process, for example, in the above scenario one In case 1 or case 2 in scenario 1 above, if the terminal device successfully re-establishes in cell D, the terminal device can send the MRO related information recorded in this round of CHO process to the network device to which cell D belongs.
  • the network device to which the cell that ultimately serves the terminal device in this round of CHO process belongs can send the MRO-related information received from the terminal device to the source network device, for example, the scenario 1 above or the scenario 1 above
  • the network equipment to which cell D belongs sends the MRO-related information received from the terminal equipment to the network equipment to which cell A belongs (that is, the source network equipment);
  • the terminal device when the terminal device switches the configuration information according to the received conditions and fails to successfully switch to the candidate cell, if the terminal device remains in the source cell, that is, the cell that ultimately serves the terminal device in the current round of CHO process is the source Cell, the terminal device can send the MRO-related information recorded in the current round of CHO process to the network device of the cell that ultimately serves the terminal device in the current round of CHO process.
  • the terminal device performs After the current round of CHO remains in the source cell, the terminal device can send the MRO-related information recorded during the current round of CHO to the network device to which cell A belongs (that is, the source network device).
  • the network device can adjust the related parameters of conditional switching according to the received MRO related information.
  • the request message may be a user information request UEInformationRequest message to trigger the sending of MRO related information. This implementation method is described in detail below.
  • the terminal device may send third instruction information to the second network device, and the third instruction information is used to notify the second network device, the terminal device Have the ability to record MRO related information.
  • the third indication information may be included in an RRC message.
  • the RRC message may be, for example, an RRC establishment complete message or an RRC reconfiguration complete message or an RRC reestablishment complete message or other RRC messages, which are not specifically limited in the embodiment of the application.
  • the third indication information may be included in a physical layer message (such as uplink control information (UCI)) or a media access control (media access control, MAC) layer message (such as media access control element (MAC) element, MAC CE)), the embodiment of this application does not specifically limit this.
  • the third indication information may be sent when the re-establishment is successful and the terminal device sends the RRC re-establishment complete message, or another possible implementation In the manner, the third indication information may be sent when the conditional handover is successfully performed and the terminal device sends the RRC reconfiguration complete message to the successfully accessed network device, which is not limited in the embodiment of the application.
  • the third indication information may be a binary value.
  • “1" indicates that the terminal device has the ability to record MRO-related information, and "0" indicates that the terminal device does not have the ability to record MRO-related information;
  • the third indication information may be a Boolean value.
  • “TRUE” indicates that the terminal device has the ability to record MRO related information
  • "FALSE” indicates that the terminal device does not have the ability to record MRO related information; or
  • the third indication information may be A certain information element, for example, the information element may be mobile robustness optimization capability (such as MRO capability), or the information element may be other expressions or naming methods, which are not specifically limited in the embodiment of this application.
  • the information element is included in the terminal device, it means that the terminal device has the ability to record MRO-related information. If the message sent by the terminal device does not include this information element, it means that the terminal device does not have the ability to record MRO-related information.
  • the second network device may send a request message to the terminal device for requesting the terminal device to report MRO related information.
  • the request message may be a UEInformationRequest message.
  • the second network device may send the request message to the terminal device after receiving the third indication information sent by the terminal device, or the second network device may also not receive the In the case of the third indication information, the request message is sent to the terminal device, that is, whether the third indication information is received is not a necessary condition for the second network device to send the request message.
  • the embodiment of the application does not specifically limit this.
  • the second network device may be a network device to which a cell that satisfies the handover trigger condition and successfully accessed the cell determined by the terminal device according to the currently received conditional handover configuration information belongs. If two candidate cells, cell B and cell C, are configured in the conditional handover configuration information, and the terminal device determines that cell C meets the handover trigger condition and the terminal device successfully accesses the cell C according to the conditional handover configuration information, the network to which cell C belongs The device is the second network device.
  • the second network device is the network device to which the cell to which the terminal device initiates re-establishment belongs after the terminal device receives the conditional handover configuration information. For example, the terminal device judges that none of the configured M candidate cells satisfy the handover trigger condition according to the currently received conditional handover configuration information, or there is at least one cell among the configured M candidate cells that meets the handover trigger condition but the terminal device is in Access to the at least one cell that meets the handover trigger condition fails, or if there are other situations, the terminal device initiates a re-establishment procedure, and the network device to which the re-established cell determined by the terminal device belongs is the second network device.
  • the terminal device selects a suitable new cell E according to the S criterion, performs an RRC re-establishment procedure with the cell E, and successfully re-establishes the cell E, then the network device to which the cell E belongs is the second network device.
  • the second network device may be the network device to which the cell that succeeded in subsequent access belongs to the terminal device after receiving the conditional switching configuration information. For example, after the terminal device determines the cell that meets the handover trigger condition according to the currently received conditional handover configuration information and successfully switches to the cell, it may subsequently access another network device due to continued movement or re-establishment or other reasons. If the network device receives the third indication information sent by the terminal device, or the network device sends the above request message requesting the terminal device to report MRO related information to the terminal device, the network device is the second network device.
  • the terminal device after receiving the conditional switching configuration information, the terminal device initiates a re-establishment process. After the re-establishment is successful, it may subsequently access other network devices due to continued movement or re-establishment or other reasons. If the network device receives the third indication information sent by the terminal device, or the other network device sends the request message to the terminal device (for example, sends a UEInformationRequest message to the terminal device), the other network device is the second network device.
  • two candidate cells (such as cell B and cell C) are configured in the conditional handover configuration information, and the terminal device determines that cell C meets the handover trigger condition and the terminal device successfully accesses the cell C according to the conditional handover configuration information.
  • the network device to which cell C belongs After the terminal device is successfully handed over to cell C, the network device to which cell C belongs does not send a UEInformationRequest message to the UE. Therefore, the terminal device does not send MRO-related information to the network device to which cell C belongs. The subsequent move is due to continued movement or re-establishment or other reasons. , The terminal device successfully accesses the cell F, and after receiving a request message (such as a UEInformationRequest message) sent by the network device to which cell F belongs, the terminal device sends MRO related information to the network device to which cell F belongs.
  • a request message such as a UEInformationRequest message
  • the first failure reason value corresponding to the candidate target cell in the MRO related information, and/or the second failure reason value corresponding to the pending cell may be sent through an RRC message, for example, the RRC message It may be a UEInformationReponse message, which is not specifically limited in the embodiment of the present application.
  • the terminal device sends the first failure reason value corresponding to the candidate target cell and/or the second failure reason value corresponding to the undetermined cell through message 2.
  • the message 2 may be an RRC message, for example, UEInformationReponse news.
  • the message 2 may also include the first information in the MRO related information, that is, the first information and the first failure reason value corresponding to the candidate target cell, and/or the second failure reason value corresponding to the pending cell may be passed
  • the first information in the MRO related information that is, the first information and the first failure reason value corresponding to the candidate target cell, and/or the second failure reason value corresponding to the pending cell may be passed
  • the same RRC message is sent.
  • the related description of the first information please refer to the above description of the first information, which will not be repeated here.
  • the first information may also be sent through another RRC message, such as message 3, that is, the first information and the first failure reason value corresponding to the candidate target cell, and/or the second failure reason value corresponding to the pending cell may be Sending through different RRC messages
  • the message 3 may be an RRC message, for example, a UEInformationReponse message, which is not specifically limited in the embodiment of the present application.
  • the message 2 may also include the second information in the foregoing MRO related information.
  • the second information please refer to the above description of the second information, which will not be repeated here.
  • the above second information can also be included in message 3.
  • the second information can be sent at the same time as the related information when the conditional handover failure occurs, that is, the second information can be the first information and the first failure reason corresponding to the candidate target cell Value, and/or, the second failure cause value corresponding to the pending cell is sent in the same message.
  • the foregoing second information may also be sent separately, for example, the terminal device sends a message 4 to the second network device, and the message 4 includes the foregoing second information.
  • the message 4 may be an RRC message, for example, a UEInformationReponse message, which is not specifically limited in the embodiment of the present application.
  • the terminal device determines that a certain cell among the candidate cells meets the handover trigger condition, and performs random access with the cell The process is successful and the terminal device successfully accesses the cell.
  • the terminal device determines that cell B meets the handover trigger condition after receiving the conditional handover configuration information, and is in the cell After B is successfully connected and the terminal device is successfully handed over to cell B, it can be considered that this round of CHO process is over. In this round of CHO process, the terminal equipment can record the relevant information of cell B.
  • the terminal equipment may not judge whether cell C meets the handover trigger condition, that is, the terminal equipment does not record the relevant information of cell C.
  • the terminal device will not record the related information about the condition switching failure, that is, the terminal device may not send the related information about the condition switching failure to the second network device, that is, the terminal device will not Send message 2 or message 3 to the second network device.
  • the terminal device will not send information about cell C to the second network device, but instead send the above second information to the second network device.
  • the device sends message 4, for example, the terminal device sends related information of cell B to the second network device.
  • message 2 or message 3 or message 4 may further include the third information or the fourth information in the foregoing MRO information.
  • the relevant description of the third information and the fourth information can refer to the description of the corresponding information above. That is, the terminal device can send the related information of the traditional handover failure together with the related information in the conditional handover process, that is, the third information and the fourth information can be the first information, the second information, and the first failure cause value corresponding to the candidate target cell.
  • the second failure cause value corresponding to the cell to be determined is sent through the same message; or, the terminal device can send the related traditional handover failure through a new message (messages other than message 2, message 3, and message 4) Information, that is, the terminal device can send the related information about the switching failure and the related information during the conditional switching process separately and independently, which is not specifically limited in this application.
  • the terminal device when the terminal device sends the above-mentioned MRO related information, for example, the terminal device sends the first failure reason value corresponding to the candidate target cell, and/or the second failure reason value corresponding to the pending cell, the first One or more of the information, the second information, the third information, and the fourth information may be sent at the granularity of the terminal device, or may be sent at the granularity of the cell, which is not specifically limited in this application.
  • the above-mentioned MRO information is included in message 2 and the message 2 is an RRC message as an example for description.
  • the terminal device When the terminal device sends the above information, it can send it through a message 2, that is to say, the source cell, each candidate target cell, and/or the pending cell, the first target cell and the current round of CHO process Finally, the MRO related information of the cell serving the terminal device is sent through a message 2, that is, the message 2 is at the granularity of the terminal device; for example, in the scenario 3 of S601 above, if the terminal device sends this message through a message 2.
  • the message 2 includes the first failure cause value corresponding to cell B and cell C, the information of cell B, the information of cell C, the first time information corresponding to cell B, and the corresponding value of cell C The first time information, cell D information, and cell A information.
  • the message 2 may include only one first failure reason value, that is, this first failure reason value corresponds to cell B and corresponds to cell C; or the message 2 may include two first failures
  • the cause value means that the two first failure cause values correspond to cell B and cell C, which are not specifically limited in the embodiment of the present application; where the information of cell A (or cell B or cell C or cell D) includes cell A (Or cell B or cell C or cell D) cell identification information, and/or cell signal quality information of cell A (or cell B or cell C or cell D).
  • the terminal device may also send the foregoing MRO information in multiple messages 2. That is, the terminal device may correlate the candidate target cells recorded by it, and/or the MRO of the pending cell and the first target cell.
  • the information sends the MRO related information corresponding to each cell in a cell unit, that is, the message 2 is cell granular. It should be noted that when message 2 is based on the cell granularity, the information of the source cell and the information of the cell that will eventually serve the terminal device during this round of CHO process can be sent separately, or can be the same as the MRO related information of the candidate target cell or the pending cell Send them together, this application does not specifically limit this.
  • the terminal device can send cell B related information through a message 2a, which contains the first failure reason value corresponding to cell B and the cell Other MRO related information corresponding to cell B (for example, the information of cell B, the first time information corresponding to cell B), and the terminal device can send related information of cell C through another message 2b, which contains the information corresponding to cell C
  • the first failure cause value and other MRO related information corresponding to cell C for example, the information of cell C, the first time information corresponding to cell C
  • the related information of cell A for example, Information of cell A
  • related information of cell D for example, information of cell D
  • the message 2c is sent, which is not specifically limited in the embodiment of the present application.
  • the information of cell A or
  • the network device that sends the above request to the terminal device to report MRO-related information is the network device to which the source cell belongs
  • the second network device and the first network device are the same network device. In this case, no Go to S603.
  • the MRO-related information when the second network device sends MRO-related information to the first network device, the MRO-related information may be included in one message and sent, or different content included in the MRO-related information may be sent through different Message sending, or, it can be understood that when sending MRO-related information, it can be sent at the granularity of the terminal device or at the granularity of the cell.
  • the embodiment of this application does not specifically limit this, and the relevant description can be referred to in S602 The corresponding description of, will not repeat it here.
  • one possibility of access failure is that the signal quality of the candidate target cell is always poor or the signal quality of the candidate target cell decays rapidly Or the signal quality is unstable, and after receiving the first failure reason value corresponding to the candidate target cell, the second network device sends the received first failure reason value corresponding to the candidate target cell to the first network device.
  • the first network device may perform corresponding processing according to the first failure reason value, for example, reconfigure other candidate cells according to the first failure reason value or adjust the previously configured according to the first failure reason value
  • the relevant parameters of the candidate cell also can be understood as the relevant parameters of the configuration condition switching.
  • the candidate target cell may be excluded, that is, the candidate target cell is no longer configured as a candidate cell. In this way, the terminal device does not need to determine whether the candidate target cell satisfies the handover trigger condition when performing the next or subsequent conditional switching, which reduces the energy consumption of the terminal device and the complexity of the terminal device implementation.
  • the handover trigger condition configured by the first network device is unreasonable.
  • the requirement for triggering handover in the handover trigger condition configuration is unreasonable.
  • the terminal equipment determines that a candidate cell meets the handover trigger condition according to the conditional handover configuration information.
  • the candidate cell satisfies the handover trigger condition, the signal quality of the cell is not as high as possible.
  • the terminal device is required to successfully access, and furthermore, the terminal device cannot successfully access the cell.
  • the second network device After receiving the first failure reason value corresponding to the candidate target cell, the second network device sends the received first failure reason value corresponding to the candidate target cell to the first network device.
  • the first network device may perform corresponding processing according to the first failure reason value, for example, reconfigure other candidate cells according to the first failure reason value or adjust the previously configured according to the first failure reason value
  • the relevant parameters of the candidate cell also can be understood as the relevant parameters of the configuration condition switching.
  • the value of the configured parameter Q may be increased.
  • the network device configuring the candidate cell may be the first network device or the network device to which the candidate cell belongs.
  • the second network device receives the pending cell corresponding After the second failure cause value of the received second failure cause value corresponding to the pending cell is sent to the first network device.
  • the first network device may perform corresponding processing according to the second failure reason value, for example, reconfigure other candidate cells according to the second failure reason value or adjust the previous configuration according to the second failure reason value
  • the relevant parameters of the candidate cell also can be understood as the relevant parameters of the configuration condition switching.
  • the first network device excludes the pending cell when subsequently configuring the candidate cell (for example, in the next or subsequent CHO process), that is, no longer configures the pending cell as a candidate cell. Therefore, the terminal When the device performs the next or subsequent conditional handover, there is no need to judge whether the pending cell meets the handover trigger condition, which reduces the energy consumption of the terminal device and the complexity of the terminal device's implementation.
  • the handover trigger condition configured by the first network device is unreasonable (taking the above configuration of event A3 as an example, it may be configured for this event
  • the parameter Q is too high, or, taking the event A5 configured above as an example, the parameter K configured for the event A5 may be too high, and/or the configured parameter L is too low).
  • the second network device After receiving the second failure reason value corresponding to the pending cell, the second network device sends the received second failure reason value corresponding to the pending cell to the first network device.
  • the first network device may perform corresponding processing according to the second failure reason value, for example, reconfigure other candidate cells according to the second failure reason value or adjust the previous configuration according to the second failure reason value
  • the relevant parameters of the candidate cell also can be understood as the relevant parameters of the configuration condition switching.
  • the first network device after the first network device receives the second failure cause value corresponding to the pending cell, it can adjust the relevant parameters reasonably. For example, taking the configuration of event A3 as an example, the first network device configures the switching trigger in the subsequent configuration. When conditions are met, the value of the configured parameter Q can be reduced.
  • the second network device after the second network device receives the first time information, and/or the second time information, it will receive the first time information and/or the second time The information is sent to the first network device.
  • the first network device may perform corresponding processing based on the first time information and/or the second time information, for example, based on the first time information , And/or, the second time information reconfigures other candidate cells or adjusts related parameters of previously configured candidate cells (also can be understood as related parameters of configuration conditional switching).
  • the network device has reconfigured the relevant parameters in the handover trigger condition corresponding to the cell where the conditional handover failed (for example, A3 is used as an example, the parameter Q is reconfigured), then the network device can receive the received from the terminal
  • the relevant information of the device corresponding to the cell where the conditional handover fails is deleted, discarded or ignored, and the relevant parameters in the handover trigger condition corresponding to the cell where the conditional handover fails are no longer adjusted.
  • the second network device after receiving the aforementioned third information or fourth information, sends the third information or fourth information to the first network device.
  • the first network device can perform corresponding processing according to the third information or the fourth information, for example, reconfigure the relevant parameters of the traditional handover according to the third information or the fourth information, for example
  • the terminal device receives the handover message but fails to access the second target cell, it may be that the second target cell does not allow the terminal device to access.
  • the first The network device may no longer configure the cell as a target cell, or, in the subsequent conditional handover procedure, the first network device may no longer configure the cell as a candidate cell; or, for example, in a possible manner, If the terminal device does not receive the handover message, it may be that the parameters of the network configuration are unreasonable.
  • the first network device can adjust the parameters of the related events in the measurement configuration. For example, take the A3 event as an example (prior art When configuring the A3 event, the first network device will configure the offset (such as P). When the signal quality of the neighboring cell is higher than the signal quality of the serving cell P, the UE will trigger the report of the measurement report).
  • the parameter P is too high and the terminal device cannot report the measurement report. Therefore, the network device side will not trigger the traditional handover preparation process. Furthermore, the first network device will not send a handover message to the terminal device, resulting in the terminal device not receiving the handover message. Therefore, the first network device can subsequently reduce the value of P according to the related information of the handover failure, thereby achieving the goal of optimization.
  • the terminal device sends to the second network device information related to candidate target cells during the conditional switching process, and/or information related to the pending cell.
  • the information reported by the terminal device may include: The first failure reason value corresponding to the candidate cell that meets the handover trigger condition but the terminal device fails to access (i.e. candidate target cell), the second failure reason value corresponding to the candidate cell that does not meet the handover trigger condition (i.e.
  • the second network device Send the above-mentioned information reported by the terminal device to the first network device, so that the first network device can reasonably optimize the handover parameters under the conditional handover mechanism based on the information related to the candidate target cell and/or the information related to the pending cell .
  • the methods and/or steps implemented by the terminal device can also be implemented by components (such as chips or circuits) that can be used in the terminal device, and the methods and/or steps implemented by the first network device Steps can also be implemented by components (such as chips or circuits) that can be used in the first network device, and methods and/or steps implemented by the second network device can also be implemented by components (such as chips or circuits) that can be used in the second network device. )achieve.
  • an embodiment of the present application also provides a communication device, which is used to implement the foregoing various methods.
  • the communication device may be the terminal device in the foregoing method embodiment, or a device including the foregoing terminal device, or a component (such as a chip or circuit) that can be used in the terminal device; or, the communication device may be the foregoing method embodiment.
  • the first network device or a device containing the above-mentioned first network device, or a component (such as a chip or circuit) that can be used in the first network device; or, the communication device may be the second network device in the above method embodiment, Either a device containing the above-mentioned second network device, or a component (such as a chip or circuit) that can be used for the second network device.
  • the communication device includes hardware structures and/or software modules corresponding to each function.
  • the present application can be implemented in the form of hardware or a combination of hardware and computer software. Whether a certain function is executed by hardware or computer software-driven hardware depends on the specific application and design constraint conditions of the technical solution. Professionals and technicians can use different methods for each specific application to implement the described functions, but such implementation should not be considered beyond the scope of this application.
  • the embodiments of the present application may divide the communication device into functional modules according to the foregoing method embodiments.
  • each functional module may be divided corresponding to each function, or two or more functions may be integrated into one processing module.
  • the above-mentioned integrated modules can be implemented in the form of hardware or software functional modules. It should be noted that the division of modules in the embodiments of the present application is illustrative, and is only a logical function division, and there may be other division methods in actual implementation.
  • FIG. 7 shows a schematic structural diagram of a terminal device 70.
  • the terminal device 70 includes a receiving module 701 and a sending module 702.
  • the receiving module 701 may also be referred to as a receiving unit to implement a receiving function, for example, it may be a receiving circuit, a receiver, a receiver or a communication interface.
  • the sending module 702 may also be referred to as a sending unit to implement a sending function, for example, it may be a sending circuit, a transmitter, a transmitter or a communication interface.
  • the receiving module 701 is used to receive conditional handover configuration information, the conditional handover configuration information includes handover trigger conditions and information of M candidate cells, where M is a positive integer; the sending module 702 is used to send the first candidate target cell The failure reason value, and/or the second failure reason value corresponding to the pending cell; wherein, the candidate target cell includes X cells satisfying the above-mentioned handover trigger condition among the M candidate cells, and the pending cell includes none of the M candidate cells.
  • X and Y are natural numbers, and X+Y is less than or equal to M.
  • the first failure reason value indicates that the candidate target cell meets the handover trigger condition, but the terminal device fails to access the candidate target cell; or, the first failure reason value includes the first-level failure reason value and the second-level failure reason Value, the first-level failure cause value indicates that the terminal device has a conditional handover failure, and the second-level failure cause value indicates that the candidate target cell meets the handover trigger condition, but the terminal device fails to access the candidate target cell.
  • the foregoing second failure cause value indicates that the cell to be determined does not meet the handover trigger condition; or, the second failure cause value includes the third level failure cause value and the fourth level failure cause value, and the third level failure cause value indicates the occurrence condition of the terminal device The handover fails, and the fourth-level failure cause value indicates that the pending cell does not meet the handover trigger condition.
  • the sending module 702 is further configured to send information about the source cell, the information about the candidate target cell, the first time information corresponding to each cell in the candidate target cell, the information about the pending cell, and each of the pending cells.
  • the above-mentioned first time information includes: time interval information from the moment when the terminal device receives the above-mentioned conditional handover configuration information to the moment when the terminal device triggers the handover to the first candidate target cell; Information on the time interval between the moment of the first candidate target cell and the moment when the terminal device fails to access the first candidate target cell, and from the moment when the terminal device fails to access the first candidate target cell to the terminal.
  • the device sends the first failure cause value and/or the time interval information between the moments of the second failure cause value, and the first candidate target cell is any one of the candidate target cells.
  • the second time information includes: the time interval information from the time when the terminal device receives the conditional handover configuration information to the time when the terminal device determines that the first pending cell does not meet the handover trigger condition, and the time interval information is determined from the terminal device Information about the time interval between the time when the first pending cell does not satisfy the handover trigger condition and the time when the terminal device sends the first failure cause value and/or the second failure cause value, the first pending cell is Any one of the cells to be determined; or, the second time information includes: from the time when the terminal device receives the above conditional handover configuration information to the time when the terminal device stops evaluating whether the first pending cell satisfies the handover trigger condition Time interval information between the time interval and the time from the time when the terminal device stops evaluating whether the first pending cell meets the handover trigger condition to the time when the terminal device sends the first failure cause value, and/or the second failure cause value Time interval information between.
  • the sending module 702 is further configured to send one or more of the information of the first target cell, the third cause value corresponding to the first target cell, and the third time information, wherein the first target cell Is a cell in which the terminal device has successfully accessed among the M candidate cells.
  • the third time information includes: time interval information from the time when the terminal device receives the conditional handover configuration information to the time when the terminal device triggers the handover to the first target cell, and the time interval information from the terminal device triggers the handover to the first target cell.
  • the terminal device 70 further includes a processing module 703.
  • the processing module 703 is configured to determine that the receiving module 701 has not received a radio resource control RRC reconfiguration message before the access to the first target cell is successful;
  • the receiving module 701 is further configured to receive an RRC reconfiguration message before the processing module 703 successfully accesses the first target cell, where the RRC reconfiguration message includes information about the second target cell; processing module 703 , Is also used to determine that access to the second target cell fails.
  • the terminal device 70 is presented in the form of dividing various functional modules in an integrated manner.
  • the "module” herein can refer to a specific ASIC, circuit, processor and memory that executes one or more software or firmware programs, integrated logic circuit, and/or other devices that can provide the above-mentioned functions.
  • the terminal device 70 may take the form of the terminal device shown in FIG. 2 or FIG. 4.
  • the processor 401 in the terminal device shown in FIG. 2 or FIG. 4 may invoke the computer execution instruction stored in the memory 402 to make the terminal device execute the information transmission method in the foregoing method embodiment.
  • the functions/implementation process of the receiving module 701, the sending module 702, and the processing module 703 in FIG. 7 can be implemented by the processor 401 in the terminal device shown in FIG. 2 or FIG. 4 calling the computer execution instructions stored in the memory 402.
  • the functions/implementation process of the receiving module 701 and the sending module 702 in FIG. 7 may be implemented by the transceiver 403 in the terminal device shown in FIG. 2 or FIG. 4, and the function/implementation process of the processing module 703 in FIG. 7 This can be achieved by invoking a computer execution instruction stored in the memory 402 by the processor 401 in the terminal device shown in FIG. 2 or FIG. 4.
  • the terminal device 70 provided in this embodiment can execute the above-mentioned information transmission method, the technical effects that can be obtained can refer to the above-mentioned method embodiment, which will not be repeated here.
  • Fig. 8 shows a schematic structural diagram of a first network device.
  • the first network device 80 includes a receiving module 801 and a sending module 802.
  • the receiving module 801 may also be referred to as a receiving unit to implement a receiving function, for example, it may be a receiving circuit, a receiver, a receiver or a communication interface.
  • the sending module 802 may also be referred to as a sending unit to implement a sending function, for example, it may be a sending circuit, a transmitter, a transmitter or a communication interface.
  • the sending module 802 is used to send conditional handover configuration information to the terminal device.
  • the conditional handover configuration information includes handover trigger conditions and information about M candidate cells, where M is a positive integer;
  • the receiving module 801 is used to receive information from the second network The first failure reason value corresponding to the candidate target cell of the device, and/or the second failure reason value corresponding to the cell to be determined;
  • the candidate target cell includes X cells satisfying the above handover triggering condition among the M candidate cells, to be determined
  • the cells include Y cells that do not meet the above-mentioned handover trigger condition among the M candidate cells, X and Y are natural numbers, and X+Y is less than or equal to M.
  • the first failure reason value indicates that the candidate target cell meets the handover trigger condition, but the terminal device fails to access the candidate target cell; or, the first failure reason value includes the first-level failure reason value and the second-level failure reason Value, the first-level failure cause value indicates that the terminal device has a conditional handover failure, and the second-level failure cause value indicates that the candidate target cell meets the handover trigger condition, but the terminal device fails to access the candidate target cell.
  • the foregoing second failure cause value indicates that the cell to be determined does not meet the handover trigger condition; or, the second failure cause value includes the third level failure cause value and the fourth level failure cause value, and the third level failure cause value indicates the occurrence condition of the terminal device The handover fails, and the fourth-level failure cause value indicates that the pending cell does not meet the handover trigger condition.
  • the receiving module 801 is further configured to receive information from the source cell of the second network device, information about the candidate target cell, first time information corresponding to each cell in the candidate target cell, and information about the pending cell. , One or more items of the second time information corresponding to each cell in the pending cell.
  • the above-mentioned first time information includes: time interval information from the moment when the terminal device receives the above-mentioned conditional handover configuration information to the moment when the terminal device triggers the handover to the first candidate target cell; Information on the time interval between the moment of the first candidate target cell and the moment when the terminal device fails to access the first candidate target cell, and from the moment when the terminal device fails to access the first candidate target cell to the terminal.
  • the device sends the first failure cause value and/or the time interval information between the moments of the second failure cause value, and the first candidate target cell is any one of the candidate target cells.
  • the second time information includes: the time interval information from the time when the terminal device receives the conditional handover configuration information to the time when the terminal device determines that the first pending cell does not meet the handover trigger condition, and the time interval information is determined from the terminal device Information about the time interval between the time when the first pending cell does not satisfy the handover trigger condition and the time when the terminal device sends the first failure cause value and/or the second failure cause value, the first pending cell is Any one of the cells to be determined; or, the second time information includes: from the time when the terminal device receives the above conditional handover configuration information to the time when the terminal device stops evaluating whether the first pending cell satisfies the handover trigger condition Time interval information between the time interval and the time from the time when the terminal device stops evaluating whether the first pending cell meets the handover trigger condition to the time when the terminal device sends the first failure cause value, and/or the second failure cause value Time interval information between.
  • the receiving module 801 is further configured to receive one or more of the information of the first target cell from the second network device, the third cause value corresponding to the first target cell, and the third time information, where ,
  • the first target cell is a cell in which the terminal device successfully accesses among the M candidate cells.
  • the third time information includes: time interval information from the time when the terminal device receives the conditional handover configuration information to the time when the terminal device triggers the handover to the first target cell, and the time interval information from the terminal device triggers the handover to the first target cell.
  • the first network device 80 is presented in the form of dividing various functional modules in an integrated manner.
  • the "module” here can refer to a specific ASIC, circuit, processor and memory that executes one or more software or firmware programs, integrated logic circuit, and/or other devices that can provide the above-mentioned functions.
  • the first network device 80 may take the form of the first network device shown in FIG. 2.
  • the processor 301a in the first network device shown in FIG. 2 may invoke the computer execution instructions stored in the memory 302a to make the first network device execute the information transmission method in the foregoing method embodiment.
  • the functions/implementation process of the receiving module 801 and the sending module 802 in FIG. 8 may be implemented by the transceiver 303a in the first network device shown in FIG. 2.
  • the first network device 80 provided in this embodiment can execute the above-mentioned information transmission method, the technical effects that can be obtained can refer to the above-mentioned method embodiment, which will not be repeated here.
  • FIG. 9 shows a schematic structural diagram of a second network device.
  • the second network device 90 includes a receiving module 901 and a sending module 902.
  • the receiving module 901 may also be referred to as a receiving unit to implement a receiving function, for example, it may be a receiving circuit, a receiver, a receiver or a communication interface.
  • the sending module 902 may also be referred to as a sending unit to implement a sending function, for example, it may be a sending circuit, a transmitter, a transmitter or a communication interface.
  • the receiving module 901 is configured to receive a first failure reason value corresponding to a candidate target cell from a terminal device, and/or a second failure reason value corresponding to a pending cell; wherein the candidate target cell includes M candidate cells X cells that meet the above handover trigger conditions, the pending cells include Y cells that do not meet the above handover trigger conditions among the M candidate cells, X and Y are natural numbers, X+Y is less than or equal to M, and the M candidate cells and The switching trigger condition is configured through conditional switching configuration information.
  • the first failure reason value indicates that the candidate target cell meets the handover trigger condition, but the terminal device fails to access the candidate target cell; or, the first failure reason value includes the first-level failure reason value and the second-level failure reason Value, the first-level failure cause value indicates that the terminal device has a conditional handover failure, and the second-level failure cause value indicates that the candidate target cell meets the handover trigger condition, but the terminal device fails to access the candidate target cell.
  • the foregoing second failure cause value indicates that the cell to be determined does not meet the handover trigger condition; or, the second failure cause value includes the third level failure cause value and the fourth level failure cause value, and the third level failure cause value indicates the occurrence condition of the terminal device The handover fails, and the fourth-level failure cause value indicates that the pending cell does not meet the handover trigger condition.
  • the receiving module 901 is further configured to receive information from the source cell of the terminal device, the information of the candidate target cell, the first time information corresponding to each cell in the candidate target cell, the information of the pending cell, and the information of the pending cell.
  • One or more items of the second time information corresponding to each cell in the cell are further configured to receive information from the source cell of the terminal device, the information of the candidate target cell, the first time information corresponding to each cell in the candidate target cell, the information of the pending cell, and the information of the pending cell.
  • the above-mentioned first time information includes: time interval information from the moment when the terminal device receives the above-mentioned conditional handover configuration information to the moment when the terminal device triggers the handover to the first candidate target cell; Information on the time interval between the moment of the first candidate target cell and the moment when the terminal device fails to access the first candidate target cell, and from the moment when the terminal device fails to access the first candidate target cell to the terminal.
  • the device sends the first failure cause value and/or the time interval information between the moments of the second failure cause value, and the first candidate target cell is any one of the candidate target cells.
  • the second time information includes: the time interval information from the time when the terminal device receives the conditional handover configuration information to the time when the terminal device determines that the first pending cell does not meet the handover trigger condition, and the time interval information is determined from the terminal device Information about the time interval between the time when the first pending cell does not satisfy the handover trigger condition and the time when the terminal device sends the first failure cause value and/or the second failure cause value, the first pending cell is Any one of the cells to be determined; or, the second time information includes: from the time when the terminal device receives the above conditional handover configuration information to the time when the terminal device stops evaluating whether the first pending cell satisfies the handover trigger condition Time interval information between the time interval and the time from the time when the terminal device stops evaluating whether the first pending cell meets the handover trigger condition to the time when the terminal device sends the first failure cause value, and/or the second failure cause value Time interval information between.
  • the receiving module 901 is further configured to receive one or more of the information of the first target cell from the terminal device, the third cause value corresponding to the first target cell, and the third time information, where the The first target cell is a cell in which the terminal device successfully accesses among the M candidate cells.
  • the third time information includes: time interval information from the time when the terminal device receives the conditional handover configuration information to the time when the terminal device triggers the handover to the first target cell, and the time interval information from the terminal device triggers the handover to the first target cell.
  • the sending module 902 is configured to send the first failure reason value corresponding to the candidate target cell and/or the second failure reason value corresponding to the undetermined cell to the first network device; wherein the candidate target cell includes M candidate cells Among the X cells meeting the above handover triggering conditions, the pending cells include Y cells that do not meet the above handover triggering conditions among the M candidate cells.
  • X and Y are natural numbers, and X+Y is less than or equal to M.
  • the M candidate cells And the switching trigger condition is configured through conditional switching configuration information.
  • the sending module 902 is further configured to send to the first network device information about the source cell, information about the candidate target cell, first time information corresponding to each cell in the candidate target cell, information about the pending cell, and One or more items of the second time information corresponding to each cell in the pending cell.
  • the sending module 902 is further configured to send one or more of the information of the first target cell, the third cause value corresponding to the first target cell, and the third time information to the first network device, where:
  • the first target cell is a cell in which the terminal device successfully accesses among the M candidate cells.
  • the second network device 90 is presented in the form of dividing various functional modules in an integrated manner.
  • the "module” here can refer to a specific ASIC, circuit, processor and memory that executes one or more software or firmware programs, integrated logic circuit, and/or other devices that can provide the above-mentioned functions.
  • the second network device 90 may take the form of the second network device shown in FIG. 2.
  • the processor 301b in the second network device shown in FIG. 2 may invoke the computer execution instructions stored in the memory 302b to make the second network device execute the information transmission method in the foregoing method embodiment.
  • the functions/implementation process of the receiving module 901 and the sending module 902 in FIG. 9 may be implemented by the transceiver 303b in the second network device shown in FIG. 2.
  • the second network device 90 provided in this embodiment can perform the above-mentioned information transmission method, the technical effects that can be obtained can refer to the above-mentioned method embodiment, and will not be repeated here.
  • an embodiment of the present application further provides a communication device (for example, the communication device may be a chip or a chip system), and the communication device includes a processor for implementing the method in any of the foregoing method embodiments.
  • the communication device further includes a memory.
  • the memory is used to store necessary program instructions and data, and the processor can call the program code stored in the memory to instruct the communication device to execute the method in any of the foregoing method embodiments.
  • the memory may not be in the communication device.
  • the communication device is a chip system, it may be composed of a chip, or may include a chip and other discrete devices, which is not specifically limited in the embodiment of the present application.
  • the computer may be implemented in whole or in part by software, hardware, firmware or any combination thereof.
  • a software program it may be implemented in the form of a computer program product in whole or in part.
  • the computer program product includes one or more computer instructions.
  • the computer may be a general-purpose computer, a special-purpose computer, a computer network, or other programmable devices.
  • the computer instructions may be stored in a computer-readable storage medium or transmitted from one computer-readable storage medium to another computer-readable storage medium.
  • the computer instructions may be transmitted from a website, computer, server, or data center.
  • the computer-readable storage medium may be any available medium that can be accessed by a computer, or may include one or more data storage devices such as servers and data centers that can be integrated with the medium.
  • the usable medium may be a magnetic medium (for example, a floppy disk, a hard disk, a magnetic tape), an optical medium (for example, a DVD), or a semiconductor medium (for example, a solid state disk (SSD)).
  • the computer may include the aforementioned device.

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Abstract

本申请实施例提供信息传输的方法、装置及系统，可以实现条件切换机制下的切换参数优化。第一网络设备向终端设备发送包括候选小区的信息和触发切换条件的条件切换配置信息；终端设备接收该条件切换配置信息并执行条件切换后，向第二网络设备发送条件切换过程中候选目标小区对应的第一失败原因值，和/或，待定小区对应的第二失败原因值，第二网络设备接收来自终端设备的上述第一失败原因值，和/或，第二失败原因值，并向第一网络设备发送该第一失败原因值，和/或，第二失败原因值。其中，候选目标小区为上述候选小区中满足上述切换触发条件且终端设备接入失败的小区，待定小区为上述候选小区中不满足上述切换触发条件的小区。

Description

信息传输的方法及装置
本申请要求于2019年02月14日提交国家知识产权局、申请号为201910115219.9、申请名称为“信息传输的方法及装置”的中国专利申请的优先权，其全部内容通过引用结合在本申请中。
技术领域
本申请涉及通信领域，尤其涉及信息传输的方法及装置。
背景技术
在移动通信系统中，传统的切换流程中，连接态终端设备的移动性管理是由网络设备控制的，即网络设备通过发送切换消息指示终端设备切换到哪个小区以及如何进行切换。传统的切换机制可以包括，源网络设备(即源小区所属的网络设备)向终端设备发送切换消息以控制终端设备从源小区切换到目标小区。所述切换消息是无线资源控制(radio resource control，RRC)消息，具体的，该RRC消息可以是携带同步重配置信元(reconfiguration with sync)的RRC重配置消息或者可以是携带移动性控制信息信元(mobility control info)的RRC连接重配置消息。终端设备在接收到该切换消息后，根据切换消息中包含的内容，接入目标小区，因此，切换消息的成功发送是保证传统切换机制下成功切换的必要条件。然而，在长期演进(long term evolution，LTE)系统或第五代移动通信技术(5th-generation，5G)(尤其是高频场景下)中，信道质量的快速衰减、或者终端设备的快速移动以及物体的遮挡，或者测量、切换准备的持续时间较长等都会导致切换消息发送失败，进而导致切换失败，降低切换成功率。
鉴于上述问题，现有技术提出条件切换(conditional handover，CHO)机制以提升切换成功率，即源网络设备在源链路质量较好时向终端设备发送条件切换的配置信息，该配置信息中包括网络设备为该终端设备配置的切换触发条件以及该切换触发条件对应的一个或多个候选小区的信息。终端设备在接收到该条件切换的配置信息后，根据该配置信息判断各候选小区是否满足切换触发条件，将满足切换触发条件的某候选小区作为目标小区，从而切换到该目标小区。由于CHO机制中，源网络设备在源链路通信质量较好的情况下向终端设备发送条件切换的配置信息，因此保证了该配置信息的发送成功率，进而，终端设备根据该配置信息自行选择目标小区并进行切换，可以提高切换的成功率。
无论在传统切换机制还是在CHO机制中，切换相关的参数始终是直接影响到切换成功率的关键因素之一。在传统切换机制中，为了优化切换参数，引入移动鲁棒性优化(mobility robustness optimization，MRO)机制，即终端设备向网络设备发送移动失败过程中的相关信息，网络设备再根据终端设备上报的该相关信息进行切换参数的优化。在现有MRO机制下，终端设备一般在以下两种场景下记录移动失败过程中的相关信息，并发送给网络设备：①终端设备接收切换消息失败，发生无线链路失败(radio link failure，RLF)；②终端设备成功接收到切换消息，但是没有成功接入到目标小区或者成功接入目标小区后很快发生RLF。
然而，由于CHO机制与传统切换机制之间的区别，现有的传统切换机制中的MRO机制并不适合CHO机制下的切换参数优化，因此，目前尚没有好的机制来及时准确地进行条件切换机制下的切换参数的优化。
发明内容
鉴于上述问题，本申请实施例提供一种信息传输的方法、装置、系统，可以解决条件切 换机制下切换参数的优化问题。
为达到上述目的，本申请的实施例采用如下技术方案：
第一方面，提供了一种信息传输的方法及相应的通信装置。该方案中，终端设备接收条件切换配置信息，该条件切换配置信息包括切换触发条件以及M个候选小区的信息，M为正整数；该终端设备发送候选目标小区对应的第一失败原因值，和/或，待定小区对应的第二失败原因值；其中，候选目标小区包括M个侯选小区中满足上述切换触发条件的X个小区，待定小区包括M个侯选小区中不满足上述切换触发条件的Y个小区，X、Y为自然数，X+Y小于或者等于M。由于本申请实施例中，终端设备可以发送条件切换机制下候选目标小区对应的第一失败原因值，和/或，待定小区对应的第二失败原因值，因此，网络侧可以根据上述失败原因值对切换参数进行优化。因此，基于本申请实施例提供的方案，可以解决条件切换机制下切换参数的优化问题。
在一种可能的设计中，该终端设备还可以发送源小区的信息、上述候选目标小区的信息、候选目标小区中每个小区各自对应的第一时间信息、上述待定小区的信息、待定小区中每个小区各自对应的第二时间信息中的一项或多项。由于本申请实施例中，终端设备可以发送条件切换机制下上述信息中的一项或多项，因此，网络侧可以根据终端设备上报的不同信息对切换参数进行更加全面的优化，使得后续配置候选小区时，配置的切换参数更合理。
在一种可能的设计中，若终端设备在第一目标小区接入成功，终端设备还可以发送该第一目标小区的信息、该第一目标小区对应的第三原因值、第三时间信息中的一项或多项，其中，该第一目标小区为所述M个候选小区中终端设备接入成功的小区。由于本申请实施例中，终端设备还发送条件切换成功时的相关信息，因此，在后续CHO过程中配置候选小区时，可以优先将该条件切换执行成功的小区配置成候选小区，使得网络侧配置的条件切换配置信息更合理。另一方面，若条件切换机制是传统切换的备胎机制，则通过将条件切换成功时的相关信息上报给网络设备，网络侧可以得知传统的切换过程没有触发或网络侧配置了传统的切换过程，但终端设备根据传统的切换消息，执行的传统切换过程并没有成功，进而，网络侧可以根据终端设备上报的条件切换成功时的相关信息，进行传统切换过程和/或条件切换过程中相关参数的调整，使得网络侧触发了条件切换过程后，能够继续触发传统切换过程，提高系统可靠性。
在一种可能的设计中，终端设备在第一目标小区接入成功之前，还可以接收RRC重配置消息，该RRC重配置消息用于指示所述终端设备执行传统切换，该RRC重配置消息中包括第二目标小区的信息。终端设备根据该RRC重配置消息在该第二目标小区进行接入；或者，终端设备可以确定未接收到该RRC重配置消息。由于本申请实施例中，终端设备在条件切换成功之前可以接收用于指示终端设备执行传统切换的RRC重配置消息，并根据该RRC重配置消息执行传统切换，因此，一方面，实现了条件切换机制作为传统切换机制的补充机制；另一方面，在传统切换失败时可以继续进行条件切换，从而可以弥补传统切换的不足，提高切换成功率。
第二方面，提供了一种信息传输的方法及相应的通信装置。该方案中，第一网络设备向终端设备发送条件切换配置信息，该条件切换配置信息包括切换触发条件以及M个候选小区的信息，M为正整数；该第一网络设备接收来自第二网络设备的候选目标小区对应的第一失败原因值，和/或，待定小区对应的第二失败原因值，其中，该候选目标小区包括上述M个侯选小区中满足上述切换触发条件且终端设备接入失败的X个小区，该待定小区包括上述M个侯选小区中不满足上述切换触发条件的Y个小区，X、Y为自然数，X+Y小于或者等于M。 其中，第二方面所带来的技术效果可参见上述第一方面所带来的技术效果，此处不再赘述。
在一种可能的设计中，该第一网络设备还可以接收来自该第二网络设备的以下信息中的一项或多项：源小区的信息、所述候选目标小区的信息、所述候选目标小区中每个小区各自对应的第一时间信息、所述待定小区的信息、所述待定小区中每个小区各自对应的第二时间信息。
在一种可能的设计中，该第一网络设备还可以接收来自该第二网络设备的以下信息中的一项或多项：第一目标小区的信息、所述第一目标小区对应的第三原因值、第三时间信息，其中，所述第一目标小区为所述M个候选小区中所述终端设备接入成功的小区。
在一种可能的设计中，该第一网络设备可以根据接收到的上述第一失败原因值，和/或，第二失败原因值，以及上述其他信息中的一项或多项，进行条件切换机制下的切换参数优化。一种可能的方式中，若第一网络设备接收到上述第一失败原因值，和/或，第二失败原因值后，该第一网络设备在后续配置候选小区时，例如，下一次或者后续的CHO过程中，可以排除某个候选目标小区，即不再将该候选目标小区配置成候选小区，这样，终端设备进行下一次或者后续的条件切换时无需再判断该候选目标小区是否满足切换触发条件，降低终端设备的能量消耗和终端设备的实现复杂度；或者，若条件切换配置信息中配置事件A3，为该A3事件配置了参数Q为例，第一网络设备在后续配置切换触发条件时，可以改变配置的参数Q的数值。另一种可能的方式中，对于某个发生条件切换失败的小区(如候选目标小区或待定小区)，如果在上述第一时间信息指示的时间间隔内，网络设备已经重新配置了该发生条件切换失败的小区对应的切换触发条件中的相关参数(如以A3为例，重新配置了参数R)，则网络设备可以将接收到的来自终端设备的对应该发生条件切换失败的小区的相关信息删除、丢弃或者忽略，不再调整该发生条件切换失败的小区对应的切换触发条件中的相关参数。另一种可能的实现方式中，第一网络设备接收到包括传统切换失败相关信息的MRO相关信息后，在后续配置候选小区时可以不再将上述第二目标小区配置成候选小区或目标小区；或者，在后续传统切换流程中，第一网络设备可以调整测量配置中的相关事件的参数，例如，测量配置中配置了A3事件，为该A3事件配置了偏移量P，则第一网络设备可以改变P的数值，进而达到优化的目的。
第三方面，提供了一种信息传输的方法及相应的通信装置。该方案中，第二网络设备接收来自终端设备的候选目标小区对应的第一失败原因值，和/或，待定小区对应的第二失败原因值，其中，该候选目标小区包括M个侯选小区中满足切换触发条件且终端设备接入失败的X个小区，该待定小区包括上述M个侯选小区中不满足上述切换触发条件的Y个小区，X、Y为自然数，X+Y小于或者等于M，该M个候选小区和该切换触发条件是通过条件切换配置信息配置的；该第二网络设备向第一网络设备发送该第一失败原因值，和/或，该第二失败原因值。其中，第三方面所带来的技术效果可参见上述第一方面所带来的技术效果，此处不再赘述。
在一种可能的设计中，该第二网络设备还可以接收来自终端设备的以下信息中的一项或多项，并向上述第一网络设备发送上述以下信息中的一项或多项：源小区的信息、候选目标小区的信息、候选目标小区中每个小区各自对应的第一时间信息、待定小区的信息、待定小区中每个小区各自对应的第二时间信息。
在一种可能的设计中，该第二网络设备还可以接收来自终端设备的以下信息中的一项或多项，并向上述第一网络设备发送上述以下信息中的一项或多项：第一目标小区的信息、该第一目标小区对应的第三原因值、第三时间信息，其中，该第一目标小区为所述M个候选小 区中所述终端设备接入成功的小区。
在一种可能的设计中，该第二网络设备可以根据接收到的上述第一失败原因值，和/或，第二失败原因值，以及上述其他信息中的一项或多项，进行条件切换机制下的切换参数优化。其中，第二网络设备进行条件切换机制下切换参数优化的方式可参见上述第一网络设备所使用的方式，此处不再赘述。
第四方面，提供了一种信息传输的方法及相应的通信装置。该方案中，第一网络设备向终端设备发送条件切换配置信息，该条件切换配置信息包括切换触发条件以及M个候选小区的信息，M为正整数；第二网络设备接收来自该终端设备的候选目标小区对应的第一失败原因值，和/或，待定小区对应的第二失败原因值，该第二网络设备向该第一网络设备发送所述第一失败原因值，和/或，所述第二失败原因值。其中，候选目标小区包括上述M个侯选小区中满足所述切换触发条件且终端设备接入失败的X个小区，待定小区包括上述M个侯选小区中不满足所述切换触发条件的Y个小区，X、Y为自然数，X+Y小于或者等于M。其中，第四方面所带来的技术效果可参见上述第一方面所带来的技术效果，此处不再赘述。结合上述第一方面或第二方面或第三方面或第四方面，在一种可能的设计中，上述第一失败原因值指示候选目标小区满足切换触发条件，但终端设备在该候选目标小区接入失败；或者，上述第一失败原因值包括第一级失败原因值和第二级失败原因值，该第一级失败原因值指示终端设备发生条件切换失败，该第二级失败原因值指示该候选目标小区满足切换触发条件，但终端设备在该候选目标小区接入失败。
结合上述第一方面或第二方面或第三方面或第四方面，在一种可能的设计中，上述第二失败原因值指示待定小区不满足切换触发条件；或者，该第二失败原因值包括第三级失败原因值和第四级失败原因值，该第三级失败原因值指示终端设备发生条件切换失败，该第四级失败原因值指示该待定小区不满足所述切换触发条件。
结合上述第一方面或第二方面或第三方面，在一种可能的设计中，上述第一时间信息包括：从终端设备接收到上述条件切换配置信息的时刻到该终端设备触发切换至第一候选目标小区的时刻之间的时间间隔信息、从该终端设备触发切换至该第一候选目标小区的时刻到该终端设备在该第一候选目标小区接入失败的时刻之间的时间间隔信息、以及从该终端设备在该第一候选目标小区接入失败的时刻到该终端设备发送上述第一失败原因值，和/或，上述第二失败原因值的时刻之间的时间间隔信息，该第一候选目标小区为候选目标小区中的任意一个小区。
结合上述第一方面或第二方面或第三方面，在一种可能的设计中，上述第二时间信息包括：从终端设备接收到上述条件切换配置信息的时刻到该终端设备确定第一待定小区不满足切换触发条件的时刻之间的时间间隔信息、以及从该终端设备确定该第一待定小区不满足该切换触发条件的时刻到该终端设备发送上述第一失败原因值，和/或，上述第二失败原因值的时刻之间的时间间隔信息，该第一待定小区为待定小区中的任意一个小区；或者，该第二时间信息包括：从该终端设备接收到上述条件切换配置信息的时刻到该终端设备停止评估该第一待定小区是否满足该切换触发条件的时刻之间的时间间隔信息、以及从该终端设备停止评估该第一待定小区是否满足该切换触发条件的时刻到该终端设备发送上述第一失败原因值，和/或，上述第二失败原因值的时刻之间的时间间隔信息。
结合上述第一方面或第二方面或第三方面，在一种可能的设计中，上述第三原因值指示终端设备执行条件切换成功。
结合上述第一方面或第二方面或第三方面，在一种可能的设计中，上述第三时间信息包 括：从终端设备接收到上述条件切换配置信息的时刻到该终端设备触发切换至上述第一目标小区的时刻之间的时间间隔信息、从该终端设备触发切换至该第一目标小区的时刻到该终端设备在该第一目标小区接入成功的时刻之间的时间间隔信息、以及从该终端设备在该第一目标小区接入成功的时刻到该终端设备发送该第一目标小区的信息、该第三原因值、该第三时间信息中的一项或多项的时刻之间的时间间隔信息。
第五方面，提供了一种通信装置用于实现上述各种方法。该通信装置可以为上述第一方面中的终端设备，或者包含上述终端设备的装置；或者，该通信装置可以为上述第二方面中的第一网络设备，或者包含上述第一网络设备的装置；或者，该通信装置可以为上述第三方面中的第二网络设备，或者包含上述第二网络设备的装置。所述通信装置包括实现上述方法相应的模块、单元、或手段(means)，该模块、单元、或means可以通过硬件实现，软件实现，或者通过硬件执行相应的软件实现。该硬件或软件包括一个或多个与上述功能相对应的模块或单元。
第六方面，提供了一种通信装置，包括：处理器和存储器；该存储器用于存储计算机指令，当该处理器执行该指令时，以使该通信装置执行上述任一方面所述的方法。该通信装置可以为上述第一方面中的终端设备，或者包含上述终端设备的装置；或者，该通信装置可以为上述第二方面中的第一网络设备，或者包含上述第一网络设备的装置；或者，该通信装置可以为上述第三方面中的第二网络设备，或者包含上述第二网络设备的装置。
第七方面，提供了一种通信装置，包括：处理器；所述处理器用于与存储器耦合，并读取存储器中的指令之后，根据所述指令执行如上述任一方面所述的方法。该通信装置可以为上述第一方面中的终端设备，或者包含上述终端设备的装置；或者，该通信装置可以为上述第二方面中的第一网络设备，或者包含上述第一网络设备的装置；或者，该通信装置可以为上述第三方面中的第二网络设备，或者包含上述第二网络设备的装置。
第八方面，提供了一种计算机可读存储介质，该计算机可读存储介质中存储有指令，当其在计算机上运行时，使得计算机可以执行上述任一方面所述的方法。
第九方面，提供了一种包含指令的计算机程序产品，当其在计算机上运行时，使得计算机可以执行上述任一方面所述的方法。
第十方面，提供了一种通信装置(例如，该通信装置可以是芯片或芯片系统)，该通信装置包括处理器，用于实现上述任一方面中所涉及的功能。在一种可能的设计中，该通信装置还包括存储器，该存储器，用于保存必要的程序指令和数据。该通信装置是芯片系统时，可以由芯片构成，也可以包含芯片和其他分立器件。
其中，第五方面至第十方面中任一种设计方式所带来的技术效果可参见上述第一方面或第二方面或第三方面或第四方面中不同设计方式所带来的技术效果，此处不再赘述。
第十一方面，提供一种通信系统，该通信系统可以包括第五方面至第十方面中所述的第一网络设备和所述第二网络设备。
第十二方面，提供一种通信系统，该通信系统可以包括第五方面至第十方面中所述的第一网络设备、所述第二网络设备以及所述终端设备。
附图说明
图1为本申请实施例提供的一种通信系统的结构示意图；
图2为本申请实施例提供的终端设备和网络设备的结构示意图；
图3为本申请实施例提供的另一种通信系统的结构示意图；
图4为本申请实施例提供的另一种终端设备和网络设备的结构示意图；
图5为本申请实施例提供的终端设备的另一种结构示意图；
图6为本申请实施例提供的信息传输的方法流程示意图；
图7为本申请实施例提供的终端设备的又一种结构示意图；
图8为本申请实施例提供的第一网络设备的又一种结构示意图；
图9为本申请实施例提供的第二网络设备的又一种结构示意图。
具体实施方式
下面将结合本申请实施例中的附图，对本申请实施例中的技术方案进行描述。其中，在本申请的描述中，除非另有说明，“/”表示前后关联的对象是一种“或”的关系，例如，A/B可以表示A或B；本申请中的“和/或”仅仅是一种描述关联对象的关联关系，表示可以存在三种关系，例如，A和/或B，可以表示：单独存在A，同时存在A和B，单独存在B这三种情况，其中A,B可以是单数或者复数。并且，在本申请的描述中，除非另有说明，“多个”是指两个或多于两个。“以下至少一项(个)”或其类似表达，是指的这些项中的任意组合，包括单项(个)或复数项(个)的任意组合。例如，a，b，或c中的至少一项(个)，可以表示：a，b，c，a-b，a-c，b-c，或a-b-c，其中a，b，c可以是单个，也可以是多个。另外，为了便于清楚描述本申请实施例的技术方案，在本申请的实施例中，采用了“第一”、“第二”等字样对功能和作用基本相同的相同项或相似项进行区分。本领域技术人员可以理解“第一”、“第二”等字样并不对数量和执行次序进行限定，并且“第一”、“第二”等字样也并不限定一定不同。
如图1所示，为本申请实施例提供的一种通信系统10。该通信系统10包括终端设备、第一网络设备、以及第二网络设备。
以图1所示的终端设备、第一网络设备、第二网络设备之间的交互为例，本申请实施例中，第一网络设备向终端设备发送条件切换配置信息，其中，该条件切换配置信息包括候选小区的信息以及切换触发条件；终端设备接收该条件切换配置信息并执行条件切换后，向第二网络设备发送条件切换过程中候选目标小区对应的第一失败原因值，和/或，待定小区对应的第二失败原因值，其中，候选目标小区为满足上述切换触发条件的候选小区，待定小区为不满足上述切换触发条件的候选小区。第二网络设备接收来自网络设备的上述第一失败原因值，和/或，第二失败原因值后，向第一网络设备发送该第一失败原因值，和/或，第二失败原因值。从而，第一网络设备或第二网络设备可以根据上述失败原因值对切换参数进行优化。因此，基于本申请实施例提供的方案，可以解决条件切换机制下切换参数的优化问题。
可选的，如图2所示，为本申请实施例提供的第一网络设备、第二网络设备和终端设备的结构示意图。
其中，终端设备包括至少一个处理器(图2中示例性的以包括一个处理器401为例进行说明)和至少一个收发器(图2中示例性的以包括一个收发器403为例进行说明)。可选的，终端设备还可以包括至少一个存储器(图2中示例性的以包括一个存储器402为例进行说明)、至少一个输出设备(图2中示例性的以包括一个输出设备404为例进行说明)和至少一个输入设备(图2中示例性的以包括一个输入设备405为例进行说明)。
处理器401、存储器402和收发器403通过通信线路相连接。通信线路可包括一通路，在上述组件之间传送信息。
处理器401可以是通用中央处理器(central processing unit，CPU)、微处理器、特定应用集成电路(application-specific integrated circuit，ASIC)，或者一个或多个用于控制本申请方案程序执行的集成电路。在具体实现中，作为一种实施例，处理器401也可以包括多个CPU， 并且处理器401可以是单核(single-CPU)处理器或多核(multi-CPU)处理器。这里的处理器可以指一个或多个设备、电路或用于处理数据(例如计算机程序指令)的处理核。
存储器402可以是具有存储功能的装置。例如可以是只读存储器(read-only memory，ROM)或可存储静态信息和指令的其他类型的静态存储设备、随机存取存储器(random access memory，RAM)或者可存储信息和指令的其他类型的动态存储设备，也可以是电可擦可编程只读存储器(electrically erasable programmable read-only memory，EEPROM)、只读光盘(compact disc read-only memory，CD-ROM)或其他光盘存储、光碟存储(包括压缩光碟、激光碟、光碟、数字通用光碟、蓝光光碟等)、磁盘存储介质或者其他磁存储设备、或者能够用于携带或存储具有指令或数据结构形式的期望的程序代码并能够由计算机存取的任何其他介质，但不限于此。存储器402可以是独立存在，通过通信线路与处理器401相连接。存储器402也可以和处理器401集成在一起。
其中，存储器402用于存储执行本申请方案的计算机执行指令，并由处理器401来控制执行。具体的，处理器401用于执行存储器402中存储的计算机执行指令，从而实现本申请实施例中所述的信息传输方法。可选的，本申请实施例中的计算机执行指令也可以称之为应用程序代码或者计算机程序代码，本申请实施例对此不作具体限定。
收发器403可以使用任何收发器一类的装置，用于与其他设备或通信网络通信，如以太网、无线接入网(radio access network，RAN)、或者无线局域网(wireless local area networks，WLAN)等。收发器403包括发射机(transmitter，Tx)和接收机(receiver，Rx)。其中，收发器也可以为输入/输出接口。
输出设备404和处理器401通信，可以以多种方式来显示信息。例如，输出设备404可以是液晶显示器(liquid crystal display，LCD)，发光二级管(light emitting diode，LED)显示设备，阴极射线管(cathode ray tube，CRT)显示设备，或投影仪(projector)等。
输入设备405和处理器401通信，可以以多种方式接受用户的输入。例如，输入设备405可以是鼠标、键盘、触摸屏设备或传感设备等。第一网络设备包括一个或多个处理器(图2中示例性的以包括一个处理器301a为例进行说明)、至少一个收发器(图2中示例性的以包括一个收发器303a为例进行说明)和至少一个网络接口(图2中示例性的以包括一个网络接口304a为例进行说明)。可选的，第一网络设备还可以包括至少一个存储器(图2中示例性的以包括一个存储器302a为例进行说明)。其中，处理器301a、存储器302a、收发器303a和网络接口304a通过通信线路相连接。网络接口304a用于通过链路(例如S1接口)与核心网设备连接(图2中未示出)，或者通过有线或无线链路(例如X2接口)与其它网络设备的网络接口进行连接，本申请实施例对此不作具体限定。另外，处理器301a、存储器302a和收发器303a的相关描述可参考终端设备中处理器401、存储器402和收发器403的描述，在此不再赘述。
第二网络设备包括一个或多个处理器(图2中示例性的以包括一个处理器301b为例进行说明)、至少一个收发器(图2中示例性的以包括一个收发器303b为例进行说明)和至少一个网络接口(图2中示例性的以包括一个网络接口304b为例进行说明)。可选的，第二网络设备还可以包括至少一个存储器(图2中示例性的以包括一个存储器302b为例进行说明)。其中，处理器301b、存储器302b、收发器303b和网络接口304b通过通信线路相连接。网络接口304b用于通过链路(例如S1接口)与核心网设备连接(图2中未示出)，或者通过有线或无线链路(例如X2接口)与其它网络设备的网络接口进行连接，本申请实施例对此不作具体限定。另外，处理器301b、存储器302b和收发器303b的相关描述可参考终端设备中处 理器401、存储器402和收发器403的描述，在此不再赘述。
另一种可能的实现方式中，如图3所示，为本申请实施例提供的一种通信系统30。该通信系统包括一个网络设备，以及与该网络设备连接的一个终端设备。可选的，该网络设备可以与多个终端设备连接，本发明对此不做具体限定。
以图3所示的终端设备与网络设备之间的交互为例，本申请实施例中，网络设备向终端设备发送条件切换配置信息，其中，该条件切换配置信息包括候选小区的信息以及切换触发条件；终端设备接收该条件切换配置信息并执行条件切换后，向网络设备发送条件切换过程中候选目标小区对应的第一失败原因值，和/或，待定小区对应的第二失败原因值，其中，候选目标小区为满足上述切换触发条件的候选小区，待定小区为不满足上述切换触发条件的候选小区。从而网络设备可以根据上述失败原因值对切换参数进行优化。因此，基于本申请实施例提供的方案，可以解决条件切换机制下切换参数的优化问题。
如图4所示，为本申请实施例提供的网络设备和终端设备的结构示意图。其中，终端设备的结构示意图可参考图2所示的终端设备的结构示意图，在此不再赘述。
网络设备包括至少一个处理器(图4中示例性的以包括一个处理器301为例进行说明)、至少一个收发器(图4中示例性的以包括一个收发器303为例进行说明)和至少一个网络接口(图4中示例性的以包括一个网络接口304为例进行说明)。可选的，网络设备还可以包括至少一个存储器(图4中示例性的以包括一个存储器302为例进行说明)。其中，处理器301、存储器302、收发器303和网络接口304通过通信线路相连接。网络接口304用于通过链路(例如S1接口)与核心网设备连接，或者通过有线或无线链路(例如X2接口)与其它网络设备的网络接口进行连接(图4中未示出)，本申请实施例对此不作具体限定。另外，处理器301、存储器302和收发器303的相关描述可参考终端设备中处理器401、存储器402和收发器403的描述，在此不再赘述。
可选的，本申请实施例网络设备(包括上述第一网络设备或第二网络设备)与终端设备也可以称之为通信装置，其可以是一个通用设备或者是一个专用设备，本申请实施例对此不作具体限定。
可选的，本申请实施例中的网络设备(包括上述第一网络设备或第二网络设备)，是一种将终端设备接入到无线网络的设备，可以是LTE系统中的演进型基站(evolutional Node B，eNB或eNodeB)；或者5G网络或者未来演进的公共陆地移动网络(public land mobile network，PLMN)中的基站，宽带网络业务网关(broadband network gateway，BNG)，汇聚交换机或非第三代合作伙伴项目(3rd generation partnership project，3GPP)接入设备等，本申请实施例对此不作具体限定。可选的，本申请实施例中的基站可以包括各种形式的基站，例如：宏基站，微基站(也称为小站)，中继站，接入点等，本申请实施例对此不作具体限定。
可选的，本申请实施例中的终端设备，可以是用于实现无线通信功能的设备，例如终端或者可用于终端中的芯片等。其中，终端可以是5G网络或者未来演进的PLMN中的用户设备(user equipment，UE)、接入终端、终端单元、终端站、移动站、移动台、远方站、远程终端、移动设备、无线通信设备、终端代理或终端装置等。接入终端可以是蜂窝电话、无绳电话、会话启动协议(session initiation protocol，SIP)电话、无线本地环路(wireless local loop，WLL)站、个人数字处理(personal digital assistant，PDA)、具有无线通信功能的手持设备、计算设备或连接到无线调制解调器的其它处理设备、车载设备或可穿戴设备，虚拟现实(virtual reality，VR)终端设备、增强现实(augmented reality，AR)终端设备、工业控制(industrial control)中的无线终端、无人驾驶(self driving)中的无线终端、远程医疗(remote medical) 中的无线终端、智能电网(smart grid)中的无线终端、运输安全(transportation safety)中的无线终端、智慧城市(smart city)中的无线终端、智慧家庭(smart home)中的无线终端等。终端可以是移动的，也可以是固定的。
结合图2或图4所示的终端设备的结构示意图，示例性的，图5为本申请实施例提供的终端设备的一种具体结构形式。
其中，在一些实施例中，图2或图4中的处理器401的功能可以通过图5中的处理器110实现。
在一些实施例中，图2或图4中的收发器403的功能可以通过图5中的天线1，天线2，移动通信模块150，无线通信模块160等实现。
其中，天线1和天线2用于发射和接收电磁波信号。终端设备中的每个天线可用于覆盖单个或多个通信频带。不同的天线还可以复用，以提高天线的利用率。例如：可以将天线1复用为无线局域网的分集天线。在另外一些实施例中，天线可以和调谐开关结合使用。
移动通信模块150可以提供应用在终端设备上的包括2G/3G/4G/5G等无线通信的解决方案。移动通信模块150可以包括至少一个滤波器，开关，功率放大器，低噪声放大器(low noise amplifier，LNA)等。移动通信模块150可以由天线1接收电磁波，并对接收的电磁波进行滤波，放大等处理，传送至调制解调处理器进行解调。移动通信模块150还可以对经调制解调处理器调制后的信号放大，经天线1转为电磁波辐射出去。在一些实施例中，移动通信模块150的至少部分功能模块可以被设置于处理器110中。在一些实施例中，移动通信模块150的至少部分功能模块可以与处理器110的至少部分模块被设置在同一个器件中。
无线通信模块160可以提供应用在终端设备上的包括无线局域网(wireless local area networks，WLAN)(如Wi-Fi网络)，蓝牙(blue tooth，BT)，全球导航卫星系统(global navigation satellite system，GNSS)，调频(frequency modulation，FM)，近距离无线通信(near field communication，NFC)，红外技术(infrared，IR)等无线通信的解决方案。无线通信模块160可以是集成至少一个通信处理模块的一个或多个器件。无线通信模块160经由天线2接收电磁波，将电磁波信号调频以及滤波处理，将处理后的信号发送到处理器110。无线通信模块160还可以从处理器110接收待发送的信号，对其进行调频，放大，经天线2转为电磁波辐射出去。当终端设备是第一设备时，无线通信模块160可以提供应用在终端设备上的NFC无线通信的解决方案，是指第一设备包括NFC芯片。该NFC芯片可以提高NFC无线通信功能。当终端设备是第二设备时，无线通信模块160可以提供应用在终端设备上的NFC无线通信的解决方案，是指第一设备包括电子标签(如射频识别(radio frequency identification，RFID)标签)。其他设备的NFC芯片靠近该电子标签可以与第二设备进行NFC无线通信。
在一些实施例中，终端设备的天线1和移动通信模块150耦合，天线2和无线通信模块160耦合，使得终端设备可以通过无线通信技术与网络以及其他设备通信。所述无线通信技术可以包括全球移动通讯系统(global system for mobile communications，GSM)，通用分组无线服务(general packet radio service，GPRS)，码分多址接入(code division multiple access，CDMA)，宽带码分多址(wideband code division multiple access，WCDMA)，时分码分多址(time-division code division multiple access，TD-SCDMA)，长期演进(long term evolution，LTE)，BT，GNSS，WLAN，NFC，FM，或IR技术等。所述GNSS可以包括全球卫星定位系统(global positioning system，GPS)，全球导航卫星系统(global navigation satellite system，GLONASS)，北斗卫星导航系统(beidou navigation satellite system，BDS)，准天顶卫星系统(quasi-zenith satellite system，QZSS)或星基增强系统(satellite based augmentation systems， SBAS)。
在一些实施例中，图2或图4中的存储器402的功能可以通过图5中的内部存储器121或者外部存储器接口120连接的外部存储器(例如Micro SD卡)等实现。
在一些实施例中，图2或图4中的输出设备404的功能可以通过图5中的显示屏194实现。其中，显示屏194用于显示图像，视频等。显示屏194包括显示面板。
在一些实施例中，图2或图4中的输入设备405的功能可以通过鼠标、键盘、触摸屏设备或图5中的传感器模块180来实现。示例性的，如图5所示，该传感器模块180例如可以包括压力传感器180A、陀螺仪传感器180B、气压传感器180C、磁传感器180D、加速度传感器180E、距离传感器180F、接近光传感器180G、指纹传感器180H、温度传感器180J、触摸传感器180K、环境光传感器180L、和骨传导传感器180M中的一个或多个，本申请实施例对此不作具体限定。
在一些实施例中，如图5所示，该终端设备还可以包括音频模块170、摄像头193、指示器192、马达191、按键190、SIM卡接口195、USB接口130、充电管理模块140、电源管理模块141和电池142中的一个或多个，其中，音频模块170可以与扬声器170A(也称“喇叭”)、受话器170B(也称“听筒”)、麦克风170C(也称“话筒”，“传声器”)或耳机接口170D等连接，本申请实施例对此不作具体限定。
可以理解的是，图5所示的结构并不构成对终端设备的具体限定。比如，在本申请另一些实施例中，终端设备可以包括比图示更多或更少的部件，或者组合某些部件，或者拆分某些部件，或者不同的部件布置。图示的部件可以以硬件，软件或软件和硬件的组合实现。
实施例一
下面以图1所示的第一网络设备、第二网络设备、以及终端设备之间的交互为例，对本申请实施例提供的信息传输方法进行展开说明。
需要说明的是，本申请下述实施例中各个网元之间的消息名字或消息中各参数的名字等只是一个示例，具体实现中也可以是其他的名字，本申请实施例对此不作具体限定。
如图6所示，为本申请实施例提供的一种信息传输的方法，该信息传输的方法包括如下：
S601、第一网络设备向终端设备发送消息1。
该消息1可以包括条件切换配置信息，该条件切换配置信息包括切换触发条件以及M个候选小区的信息。其中，第一网络设备可以称为源网络设备，即第一网络设备是源小区所属的网络设备，M为正整数，也就是说，消息1中可以包括一个或者多个候选小区的信息。可以理解的是，切换触发条件和M个候选小区的信息可以在同一个消息中发送，也可以在不同的消息中发送，本申请实施例对此不作限定。
可选的，该条件切换配置信息中还可以包括终端设备接入该M个候选小区中的任一个或任几个候选小区执行随机接入时所需要的信息，终端设备可以根据该信息，对该候选小区发起非竞争性接入。
其中，终端设备接收第一网络设备发送的消息1之后，可以根据消息1中包含的条件切换配置信息，判断M个候选小区中的任意一个小区是否满足切换触发条件，进而可以确定出至少一个候选目标小区，和/或，至少一个待定小区。其中，候选目标小区包括M个侯选小区中满足切换触发条件且终端设备接入失败的X个小区，待定小区包括M个侯选小区中不满足切换触发条件的Y个小区，X为小于或者等于M的任一自然数、Y为小于或者等于M的任一自然数，且X+Y小于或者等于M。
需要说明的是，在本申请实施例中，除特殊说明外，接入失败是指终端设备在某小区接 入失败，例如终端设备在某小区进行的随机接入过程失败；或者，接入失败是指终端设备在某小区接入成功后又在该小区发生RLF，例如终端设备在某小区随机接入成功，但终端设备接入成功后的预定时间内在该小区发生RLF，例如，终端设备接入某小区成功的X秒后发生RLF，X可以是协议规定的，也可以是网络配置的，本申请对此不做具体限定。
S602、终端设备向第二网络设备发送MRO相关信息。
可选的，本申请实施例中，CHO过程中，有相关能力的终端设备，如具备记录MRO相关信息能力的终端设备，还可以记录一个或多个候选小区的MRO相关信息，进而，终端设备可以向第二网络设备发送MRO相关信息。
可选的，本申请实施例中，终端设备可以通过RRC消息向第二网络设备发送MRO相关信息。例如，该RRC消息可以是用户信息应答UEInformationReponse消息，当然，也可以是其他RRC消息或者其他形式的消息，本申请对此不做具体限定。
可选的，本申请实施例中，可以是第二网络设备请求或触发终端设备发送MRO相关信息的，也可以是终端设备自身触发MRO相关信息的发送(例如，终端设备周期性或基于事件发送MRO相关信息)，本申请实施例对此不作具体限定。
可选的，本申请实施例中，第二网络设备接收到来自终端设备的包括MRO相关信息的消息后，可以转发给第一网络设备，由第一网络设备进行条件切换相关参数调整；或者，第二网络设备可以将上述消息转发给MRO相关信息中相应的候选小区所属的网络设备，由相应的候选小区所属的网络设备进行条件切换相关参数调整；或者，第二网络设备也可以根据上述消息中的内容进行条件切换相关参数调整，例如，当MRO信息中包含的相应的候选小区属于该第二网络设备时，该第二网络设备可以进行条件切换相关参数调整。可选的，第二网络设备进行相应处理(如条件切换参数优化)后，可以将处理结果发送给第一网络设备或上述MRO相关信息中相应的候选小区所述的网络设备，本申请实施例对此不做具体限定。
第二网络设备接收到来自终端设备的包括MRO相关信息的消息后，若确定将该消息转发给第一网络设备，则执行S603。
S603、第二网络设备向第一网络设备发送MRO相关信息。
可选的，本申请实施例中，第二网络设备和第一网络设备可以是相同的网络设备，此时，不需要执行S603；或者，第二网络设备和第一网络设备可以是不同的网络设备，此时，需要执行S603。
其中，在上述S601-S603中：
本申请实施例中的MRO相关信息包括候选目标小区对应的第一失败原因值，和/或，待定小区对应的第二失败原因值。
例如，若存在候选目标小区，不存在待定小区，则本申请实施例中的MRO相关信息包括候选目标小区对应的第一失败原因值；或者，若存在待定小区，不存在候选目标小区，则本申请实施例中的MRO相关信息包括待定小区对应的第二失败原因值；或者，若存在候选目标小区和待定小区，则本申请实施例中的MRO相关信息包括候选目标小区对应的第一失败原因值和待定小区对应的第二失败原因值。
可选的，本申请实施例中，第一失败原因值指示候选目标小区满足切换触发条件，但终端设备在候选目标小区接入失败。或者，第一失败原因值包括两级原因值，例如，第一级失败原因值和第二级失败原因值，第一级失败原因值指示终端设备发生条件切换失败，第二级失败原因值指示候选目标小区满足切换触发条件，但终端设备在候选目标小区接入失败。
可选的，本申请实施例中，对于第二级失败原因值，一种可能的表示方式为，引入一种 新的原因值表示候选目标小区满足切换触发条件，但终端设备在候选目标小区接入失败。例如该第二级失败原因值可以用条件触发但接入失败(如ConditionTriggerButAccessFailure)表示，或者该第二级失败原因值可用其他表示形式，本申请实施例对此不做具体限定。另一种可能的表示方式为，复用现有的切换失败(handover failure，HOF)原因值或RLF原因值。示例性的，可以复用现有的HOF，即可以重定义HOF原因值表示某小区满足切换触发条件，但终端设备在该小区接入失败。可选的，本申请实施例中，候选目标小区与第一失败原因值的对应关系可以为每个候选目标小区各自对应一个第一失败原因值；或者，多个候选目标小区对应同一个第一失败原因值。示例性的，以源小区为小区A，条件切换配置信息中包含小区B、小区C和小区D共3个候选小区为例，其中，小区B、小区C和小区D均为满足切换触发条件的候选目标小区，且终端设备在小区B、小区C和小区D均接入失败，则候选目标小区与第一失败原因值的对应关系可以为，小区B对应第一失败原因值1，小区C对应第一失败原因值2，小区D对应第一失败原因值3；或者，小区B和小区C共同对应第一失败原因值4，小区D对应第一失败原因值5；或者，小区B、小区C和小区D共同对应第一失败原因值6。
可选的，本申请实施例中，第二失败原因值指示待定小区不满足切换触发条件；或者，第二失败原因值包括两级原因值，例如，第三级失败原因值和第四级失败原因值，第三级失败原因值指示终端设备发生条件切换失败，第四级失败原因值指示待定小区不满足切换触发条件。
可选的，本申请实施例中，对于第四级失败原因值，一种可能的表示方式为，引入一种新的原因值表示待定小区不满足切换触发条件，例如，该第四级失败原因值可以用条件不满足(如ConditionNotTrigger)表示，或者该第四级失败原因值可用其他表示形式，本申请实施例对此不做具体限定。另一种可能的表示方式为，复用现有的HOF原因值或RLF原因值。示例性的，可以复用RLF，即可以重定义RLF原因值表示小区不满足切换触发条件。
可选的，本申请实施例中，待定小区与第二失败原因值的对应关系可以为每个待定小区各自对应一个第二失败原因值；或者，多个待定小区对应同一个第二失败原因值。具体对应关系与候选目标小区和第一失败原因值的对应关系类似，相关描述可参考候选目标小区和第一失败原因值的对应关系的描述，在此不再赘述。
可选的，本申请实施例中，MRO相关信息还包括第一信息，其中，该第一信息包括以下信息中的一项或多项：源小区的信息、候选目标小区的信息、候选目标小区中每个小区各自对应的第一时间信息、待定小区的信息、待定小区中每个小区各自对应的第二时间信息。其中，源小区的信息包括源小区的小区标识信息，和/或，源小区的小区信号质量信息；候选目标小区的信息包括候选目标小区的小区标识信息，和/或，候选目标小区的小区信号质量信息；待定小区的信息包括待定小区的小区标识信息，和/或，待定小区的小区信号质量信息。具体的，小区标识信息可以包括PCI以及小区所对应的频率信息，和/或，小区全球标识CGI，例如，可以将PCI以及小区所对应的频率信息作为小区的标识，也可以将CGI作为小区的标识。其中，频率信息包括以下一项或多项：同步信号块SSB的绝对频率(如absoluteFrequencySSB)、参考资源模块(common RB0)的绝对频率位置(如absoluteFrequencyPointA)、频率带宽列表(如frequencyBandList)、子载波间隔(如subcarrier spacing，SCS)、SCS特定的载波列表(如scs-SpecificCarrierList)；小区信号质量信息包括小区的参考信号接收功率(reference signal received power，RSRP)，和/或，参考信号接收质量(reference signal received quality，RSRQ)。可选的，小区信号质量还可以包括该小区的信号质量变化率。
可选的，本申请实施例中，第一时间信息包括：从终端设备接收到条件切换配置信息的时刻到该终端设备触发切换至第一候选目标小区的时刻之间的时间间隔信息、从该终端设备触发切换至第一候选目标小区的时刻到该终端设备在第一候选目标小区接入失败的时刻之间的时间间隔信息、以及从该终端设备在第一候选目标小区接入失败的时刻到该终端设备发送该第一候选目标小区对应的第一失败原因值的时刻之间的时间间隔信息(或者，从该终端设备在第一候选目标小区接入失败的时刻到该终端设备发送上述第一信息的时刻之间的时间间隔信息)，其中，第一候选目标小区为候选目标小区中的任意一个小区。
需要说明的是，本申请实施例中，触发切换至第一候选目标小区的时刻指终端设备确定第一候选目标小区满足切换触发条件的时刻；或者，触发切换至第一候选目标小区的时刻指终端设备向第一候选目标小区发起接入的时刻，该接入可以是非竞争性接入，也可以是竞争性接入。示例性的，触发切换至第一候选目标小区的时刻指终端设备向第一候选目标小区发起接入的时刻终端设备向第一候选目标小区发起随机接入的时刻，如终端设备向第一候选目标小区发送前导码序列(preamble)的时刻。
或者，一种可能的实现方式中，第一时间信息包括：从终端设备接收到条件切换配置信息的时刻到该终端设备触发切换至第一候选目标小区的时刻之间的时间间隔信息、从该终端设备触发切换至所述第一候选目标小区的时刻到该终端设备发送该第一候选目标小区对应的第一失败原因值的时刻之间的时间间隔信息(或者，从该终端设备触发切换至所述第一候选目标小区的时刻到该终端设备发送上述第一信息的时刻之间的时间间隔信息)。或者，又一种可能的实现方式中，第一时间信息包括：从终端设备接收到条件切换配置信息的时刻到该终端设备在第一候选目标小区接入失败的时刻之间的时间间隔信息、以及从该终端设备在第一候选目标小区接入失败的时刻到该终端设备发送该第一候选目标小区对应的第一失败原因值的时刻之间的时间间隔信息(或者，从该终端设备在第一候选目标小区接入失败的时刻到该终端设备发送上述第一信息的时刻之间的时间间隔信息)。
或者，又一种可能的实现方式中，第一时间信息为从终端设备接收到条件切换配置信息的时刻到该终端设备发送该第一候选目标小区对应的第一失败原因值的时刻之间的时间间隔信息或者为从终端设备接收到条件切换配置信息的时刻到该终端设备发送上述第一信息的时刻之间的时间间隔信息。
可选的，本申请实施例中，第二时间信息包括：从该终端设备接收到条件切换配置信息的时刻到该终端设备确定第一待定小区不满足切换触发条件的时刻之间的时间间隔信息、以及从该终端设备确定第一待定小区不满足切换触发条件的时刻到该终端设备发送该第一待定小区对应的第二失败原因值的时刻之间的时间间隔信息(或者，从该终端设备确定第一待定小区不满足切换触发条件的时刻到该终端设备发送上述第一信息的时刻之间的时间间隔信息)，其中，第一待定小区为待定小区中的任意一个小区；
或者，又一种可能的实现方式中，第二时间信息包括：从该终端设备接收到条件切换配置信息的时刻到该终端设备停止评估第一待定小区是否满足切换触发条件的时刻之间的时间间隔信息、从该终端设备停止评估第一待定小区是否满足所述切换触发条件的时刻到该终端设备发送该第一待定小区对应的第二失败原因值的时刻之间的时间间隔信息(或者，从该终端设备停止评估第一待定小区是否满足所述切换触发条件的时刻到该终端设备发送上述第一信息的时刻之间的时间间隔信息)。其中，示例性的，上述第二时间信息中所提及的终端设备停止评估第一待定小区是否满足切换触发条件的时刻为终端设备采用“轮询式”判断时不再重复判断第一待定小区是否满足切换触发条件的时刻。
或者，又一种可能的实现方式中，第二时间信息为从该终端设备接收到条件切换配置信息的时刻到该终端设备发送该第一待定小区对应的第二失败原因值的时刻之间的时间间隔信息，或者，第二时间信息为从该终端设备接收到条件切换配置信息的时刻到该终端设备发送上述第一信息的时刻之间的时间间隔信息。
可选的，本申请实施例中，上述第一信息中还可以包括终端设备当前接收到条件切换配置信息后，成功接入的小区的信息，即本轮CHO过程中最终为终端设备提供服务的小区的信息，或者也可以理解上述成功接入的小区的信息是本轮CHO过程中最终与终端设备之间存在(或者建立，或者维持)RRC连接的小区的信息。其中，该小区的信息包括小区标识信息，和/或，小区信号质量信息，小区标识信息以及小区信号质量信息的相关描述可参考上述对小区标识信息以及小区信号质量信息的描述，在此不再赘述。示例性的，如源小区为小区A，条件切换配置信息中配置了小区B和小区C两个候选小区，终端设备根据条件切换配置信息，确定出小区C满足切换触发条件且终端设备在小区C接入成功，则终端设备可以记录小区C的信息；或者，另一种示例，终端设备根据当前接收到的条件切换配置信息，判断出配置的M个候选小区均不满足切换触发条件，或者，终端设备在配置的M个候选小区中的所有候选目标小区均接入失败，或者，存在其他情况，终端设备发起重建立流程，且重建立成功，则终端设备可以记录重建立小区的信息(如，终端设备与小区E进行RRC重建立流程，并在小区E重建立成功，则终端设备可以记录小区E的信息)，其中，重建立小区可以是上述M个候选小区中的一个小区，也可以是该M个候选小区之外的小区。或者，另一种示例，终端设备根据当前接收到的条件切换配置信息，判断出配置的M个候选小区均不满足切换触发条件，或者，终端设备在配置的M个候选小区中的所有候选目标小区均接入失败，或者，存在其他情况，此时，源小区的信号质量还较好，终端设备与源小区(或源网络设备)间仍然保持RRC连接，则终端设备可以记录源小区的信息，即终端设备可以记录小区A的信息。
一般来说，一个小区由一个下行载波和一个上行载波组成。但5G的新无线电(new radio，NR)通信系统部署高频小区时，由于NR运行频段较高且终端设备的发射功率较低，处于小区边缘区域的终端设备可以接收到网络设备(如基站)的信号，但是网络无法接收到终端设备的信号，即存在上下行覆盖不对称的问题。为了解决这个问题，引入另外一段低频频段(如LTE的频段)用于辅助终端设备进行上行传输(即引入补充上行链路(supplementary uplink，SUL))，因此终端设备拥有两段上行链路(uplink，UL)载波频谱进行上行传输。支持SUL配置的小区有一个下行载波和两个上行载波，为了区分两个上行载波，一个称为SUL载波，另一个称为正常上行链路(normal uplink，NUL)载波。可选的，本申请实施例中，如果候选目标小区支持配置SUL，当终端设备在该支持配置SUL的候选目标小区接入失败时，上述第一信息中还可以包括终端设备在该候选目标小区接入失败时所使用的UL载波信息(如NUL或SUL)，以指示终端设备是在该候选目标小区的NUL还是SUL接入失败；或者，终端设备也可以不显式地发送载波信息，例如，协议规定当终端设备不发送载波信息时，默认终端设备在该候选目标小区的NUL接入失败或者默认在该候选目标小区的SUL接入失败，本申请对此不做具体限定。
可选的，本申请实施例中，MRO相关信息还包括第二信息，该第二信息为终端设备执行条件切换成功时的小区的相关信息，其中，第二信息包括以下信息中的一项或多项：
第一目标小区的信息、第一目标小区对应的第三原因值、第三时间信息，其中，该第一目标小区为候选小区中满足切换触发条件且终端设备接入成功的小区。需要说明的是，若本轮CHO过程中最终为终端设备提供服务的小区为候选小区中满足切换触发条件且终端设备 接入成功的小区(或者可以理解为本轮CHO过程中，执行条件切换成功的小区)，则终端设备记录的本轮CHO过程中最终为终端设备提供服务的小区的信息与终端设备记录的本轮CHO过程中的第一目标小区的信息是两份相同的信息，为避免存储开销，终端设备可以只记录两份相同的信息中的一份，或者，可以理解为上述第二信息中可以不包括第一目标小区的信息或者上述第一信息中可以不包括本轮CHO过程中最终为终端设备提供服务的小区的信息。
该第一目标小区对应的第三原因值指示终端设备执行条件切换成功。该第三时间信息包括：从终端设备接收到条件切换配置信息的时刻到终端设备触发切换至第一目标小区的时刻之间的时间间隔信息、从终端设备触发切换至第一目标小区的时刻到终端设备在第一目标小区接入成功的时刻之间的时间间隔信息、以及从终端设备在第一目标小区接入成功的时刻到终端设备发送该第一目标小区对应的第三原因值的时刻之间的时间间隔(或者，从终端设备在第一目标小区接入成功的时刻到终端设备发送上述第一信息的时刻之间的时间间隔；或者，从终端设备在第一目标小区接入成功的时刻到终端设备发送上述第二信息的时刻之间的时间间隔)。
需要说明的是，本申请实施例中，触发切换至第一目标小区的时刻指终端设备确定第一目标小区满足切换触发条件的时刻；或者，触发切换至第一目标小区的时刻指终端设备向第一目标小区发起接入的时刻，该接入可以是非竞争性接入，也可以是竞争性接入。示例性的，触发切换至第一候选目标小区的时刻指终端设备向第一候选目标小区发起接入的时刻终端设备向第一候选目标小区发起随机接入的时刻，如终端设备向第一目标小区发送前导码序列(preamble)的时刻。
或者，另一种可能的实现方式中，第一目标小区对应的第三时间信息包括：从终端设备接收到条件切换配置信息的时刻到终端设备在第一目标小区接入成功的时刻之间的时间间隔信息、以及从终端设备在第一目标小区接入成功的时刻到终端设备发送该第一目标小区对应的第三原因值的时刻之间的时间间隔信息(或者，从终端设备在第一目标小区接入成功的时刻到终端设备发送上述第一信息的时刻之间的时间间隔信息；或者，从终端设备在第一目标小区接入成功的时刻到终端设备发送上述第二信息的时刻之间的时间间隔)。
或者，另一种可能的实现方式中，第一目标小区对应的第三时间信息包括：从终端设备接收到条件切换配置信息的时刻到终端设备触发切换至第一目标小区的时刻之间的时间间隔信息、从终端设备触发切换至第一目标小区的时刻到终端设备发送该第一目标小区对应的第三原因值的时刻之间的时间间隔信息(或者，从终端设备触发切换至第一目标小区的时刻到终端设备发送上述第一信息的时刻之间的时间间隔信息；或者，从终端设备在第一目标小区接入成功的时刻到终端设备发送上述第二信息的时刻之间的时间间隔)。或者，第一目标小区对应的第三时间信息为从终端设备接收到条件切换配置信息的时刻到该终端设备发送该第一目标小区对应的第三原因值的时刻之间的时间间隔信息(或者，第一目标小区对应的第三时间信息为从终端设备接收到条件切换配置信息的时刻到该终端设备发送上述第一信息的时刻之间的时间间隔信息；或者，从终端设备在第一目标小区接入成功的时刻到终端设备发送上述第二信息的时刻之间的时间间隔)。
可选的，本申请实施例中，条件切换机制可以作为传统切换机制的一种补充技术，也就是说，源网络设备(即第一网络设备)在源链路质量较好的情况下向终端设备发送条件切换配置信息，随后，源网络设备还可以按照现有的传统切换机制给终端设备发送切换消息(本申请实施例中，可以将按照传统切换机制给终端设备发送的切换消息称为传统切换消息)NR 系统中该传统切换消息可以是包含同步重配置信元的RRC重配置消息，或者，LTE系统中该传统切换消息可以是包含移动控制信元的RRC连接重配置消息，本申请实施例对此不做具体限定。该传统切换消息包含第二目标小区的相关信息，例如，第二目标小区的相关信息包括第二目标小区的小区标识信息、第二目标小区为终端设备分配的C-RNTI、第二目标小区关联的随机接入配置等，该传统切换消息可以是携带同步重配置信元的RRC重配置消息，也可以是携带移动性控制信元的RRC连接重配置消息，本申请对此不做具体限定。
在条件切换机制作为传统切换机制的一种补充技术时，存在一种可能的场景1，即：终端设备收到条件切换配置信息后，判断候选小区是否满足切换触发条件，若在还没有确定出满足切换触发条件的小区或者确定出了满足切换触发条件的小区但还没有成功接入到该小区前，终端设备收到传统切换消息，此时，终端设备可以根据该传统切换消息，尝试接入到该第二目标小区。若终端设备在第二目标小区接入成功，则可选的，终端设备可以丢弃/删除条件切换配置信息，若终端设备在第二目标小区接入失败，则终端设备可以继续根据该条件切换配置信息进行条件切换。
在条件切换机制作为传统切换机制的一种补充技术时，还存在一种可能的场景2，即：终端设备接收到条件切换配置信息后，确定出满足切换触发条件的小区且成功切换到该小区，也就是说在终端设备成功切换到满足切换触发条件的小区前，源网络设备没有给终端设备发送传统切换消息；或者源网络设备向终端设备发送了传统切换消息但是终端设备没有接收到源网络设备发送的该传统切换消息，此时，终端设备可以根据上述条件切换配置信息执行条件切换。其中，终端设备没有收到该传统切换消息的一种可能是，源链路质量较差。源网络设备没有向终端设备发送传统切换消息的一种可能是，源网络设备与确定出的第二目标小区所属的网络设备间进行的切换准备过程失败或消耗的时间太长，导致网络过晚配置或者没有配置传统的切换流程，本申请实施例对此不做具体限定。
可选的，本申请实施例中，在上述可能的场景1中，若终端设备接收到来自源网络设备的传统切换消息，但没有成功接入到该传统切换消息中指示的第二目标小区，上述MRO相关信息还可以包括第三信息，即切换失败的相关信息，或者说是传统切换失败的相关信息，该第三信息可以包括以下一项或多项：源小区的信息、第二目标小区的信息、第四失败原因值、第四时间信息、第一指示信息，该第一指示信息指示终端设备接收到切换消息。其中，第二目标小区的信息包括该第二目标小区的小区标识信息，和/或，第二目标小区的小区信号质量信息。第四失败原因值指示终端设备执行传统切换失败或在该第二目标小区接入失败，例如，该第四失败原因值可以为HOF，即复用现有失败原因值HOF，表示传统切换失败或在第二目标小区接入失败，本申请对此不做具体限定。第四时间信息包括：从终端设备接收到切换消息的时刻到该终端设备在该第二目标小区接入失败的时刻之间的时间间隔信息、以及从该终端设备在第二目标小区接入失败的时刻到该终端设备发送上述第三信息的时刻之间的时间间隔信息；或者，第四时间信息包括：从终端设备接收到切换消息的时刻到该终端设备发送上述第三信息的时刻之间的的时间间隔信息。第一指示信息可以是二进制数值，例如，“1”表示终端设备接收到切换消息；或者可以是布尔值，例如，“TRUE”表示终端设备接收到切换消息；或者可以是某信元，例如，作为一种示例，该信元可以是接收到传统切换消息(如HO-received)，或者该信元可以有其他表示/命名方式，本申请实施例对此不做具体限定。当终端设备上报该信元，则表示终端设备接收到传统切换消息，如果终端设备没有上报该信元，则表示终端设备没有接收到传统切换消息。本申请对第上述一指示信息的表示形式不做具体限定。由于终端设备没有根据传统切换消息成功执行传统切换，那么终端设备可以继续 根据在切换消息前接收到的条件切换配置信息，判断候选小区是否满足切换触发条件，候选小区中存在候选目标小区，和/或，待定小区时，终端设备可以记录并上报与候选目标小区，和/或，待定小区相关的信息，具体描述参照上文，不再赘述。
可选的，本申请实施例中，在上述可能的场景2中，若终端设备没有接收到来自源网络设备的传统切换消息，MRO相关信息还可以包括第四信息，即切换失败的相关信息，或者说是传统切换失败的相关信息，该第四信息可以包括以下一项或多项：源小区的信息、第五时间信息、第二指示信息，该第二指示信息指示终端设备未接收到切换消息。其中，第五时间信息包括：从终端设备与源网络设备发生RLF的时刻到该终端设备发送上述第四信息的时刻之间的时间间隔信息。第二指示信息可以是二进制数值，例如，“0”表示终端设备未接收到切换消息；或者可以是布尔值，例如，“FALSE”表示终端设备未接收到切换消息；或者可以是某信元，例如，作为一种示例，该信元可以是未收到传统切换消息(如HO-notreceived)，或者该信元可以有其他表示/命名方式，不做限定。当终端设备上报该信元，则表示终端设备未接收到传统切换消息，如果终端设备没有上报该信元，则表示终端设备接收到传统切换消息。本申请对上述第二指示信息的表示形式不做具体限定。由于终端设备没有接收到传统切换消息，那么终端设备根据接收到的条件切换配置，判断候选小区是否满足切换触发条件，候选小区中存在候选目标小区，和/或，待定小区时，终端设备可以记录并上报与候选目标小区，和/或，待定小区相关的信息，具体描述参照上文，不再赘述。
其中，在上述S601中：
可选的，该消息1可以为携带同步重配置信元(reconfiguration with sync)的RRC重配置消息；或者，该消息1可以为新定义的RRC消息，如该消息1为条件切换消息，或者该消息1有其他命名；或者，该消息1可以为携带移动性控制信息信元(mobility control info)的RRC连接重配置消息，本申请实施例对此不做具体限定。
可选的，本申请实施例中，M个候选小区中的每个候选小区的信息可以包括以下信息中的一项或多项：该候选小区所对应的小区标识(如PCI以及小区所对应的频率信息，和/或，小区全球标识(cell global identity，CGI)，例如，可以将PCI以及小区所对应的频率信息作为小区的标识，也可以将CGI作为小区的标识)、该候选小区为该终端设备分配的小区无线网络临时标识(cell radio network temporary identifier，C-RNTI)、该候选小区所关联的随机接入信道(random accesschannel，RACH)资源，例如，该随机接入信道RACH资源可以包括专用随机接入资源和/或公共随机接入资源，其中，专用随机接入资源包括前导码索引和第一时频资源，公共随机接入资源包括第二时频资源，频率信息包括以下一项或多项：同步信号块SSB的绝对频率(如absoluteFrequencySSB)、参考资源模块(common RB0)的绝对频率位置(如absoluteFrequencyPointA)、频率带宽列表(如frequencyBandList)、子载波间隔(如subcarrier spacing，SCS)、SCS特定的载波列表(如scs-SpecificCarrierList)。
其中，本申请实施例中，切换触发条件用于终端设备判断M个候选小区中的任意一个小区是否可以触发切换。可选的，条件切换配置信息中的切换触发条件有多种可能的配置。
示例性的，一种切换触发条件的可能配置为，配置切换触发事件为A3事件，为该A3事件配置参数Q，则当M个候选小区中的某小区的信号质量比该终端设备当前服务小区的信号质量高出Q时，该小区满足切换触发条件。可以看出，Q为一阈值，其单位可以为分贝(dB)或分贝毫瓦(dBm)，本申请实施例对此不做具体限定。
或者，另一种切换触发条件的可能配置为，配置切换触发事件为A5事件，为该A5事件配置参数K和L，则当M个候选小区中的某小区的信号质量高于K并且该终端设备当前服 务小区的信号质量低于L时，该小区满足切换触发条件，其中，该终端设备的当前服务小区指终端设备接收到该条件切换配置信息时的服务小区，即该终端设备的当前服务小区是源小区。可以看出，K和L均为阈值，其单位可以为分贝(dB)或分贝毫瓦(dBm)，本申请实施例对此不做具体限定。
可选的，本申请实施例中的切换触发条件可以与M个候选小区中的各个小区一一对应，也就是说，网络设备可以配置M个切换触发条件，该M个切换触发条件与M个候选小区一一对应；或者，网络设备可以为多个候选小区配置同一个切换触发条件，本申请对此不做具体限定。示例性的，以源小区为小区A，条件切换配置信息中配置了B、C、D三个候选小区为例，可以为小区B配置切换触发条件1，为小区C配置切换触发条件2，为小区D配置切换触发条件3；或者，可以为小区B和C配置切换触发条件4，为小区D配置切换触发条件5；或者，可以为小区B、C、D配置同一切换触发条件6。
需要说明的是，上述切换触发条件的配置以及切换触发条件和候选小区的对应关系只是本申请的示例性说明，实际应用中本申请对此不做具体限定。
其中，本申请实施例中，终端设备在判断候选小区中的小区是否满足切换触发条件时，可以采用“轮询式”判断，也可以采用“一次性”判断。“轮询式”判断指终端设备会重复判断已经判断过的候选小区是否满足切换触发条件，“一次性”判断指终端设备不会重复判断已经判断过的候选小区是否满足切换触发条件。“轮询式”判断中，终端设备判断候选小区是否满足切换触发条件的总时长可以是协议约定的，也可以是网络设备发送给终端设备的(如第一网络设备向终端设备发送的消息1中可以包含该总时长的信息，本申请对此不做具体限定)。当然，可选的，“轮询式”判断也可以没有时间限制。示例性的，条件切换配置信息中配置了候选小区B和小区C，如果终端设备确定出小区B不满足切换触发条件，后续可以继续判断小区B是否满足切换触发条件，此时即为“轮询式”判断。如果终端设备一旦判断出小区B不满足切换触发条件，后续不再判断小区B是否满足切换触发条件，此时即为“一次性”判断。
此外，终端设备根据条件切换配置信息判断候选小区中的小区是否满足切换触发条件时，若终端设备在配置的候选小区中的一个满足切换触发条件的小区接入失败后或者终端设备确定候选小区中的一个小区不满足切换触发条件后，可以继续判断候选小区中的小区是否满足切换触发条件(此时，终端设备可以采用“轮询式”判断，也可以采用“一次性判断”，本申请对此不做具体限定)，直到终端设备确定出满足切换触发条件的小区，并在该满足切换触发条件的小区成功接入，此时，上述整个过程可以看成一轮CHO过程；或者，直到终端设备判断完所有的候选小区是否满足切换触发条件，即所有的候选小区都被终端设备进行过至少一次是否满足切换触发条件的判断(此时，终端设备可以采用“轮询式”判断，也可以采用“一次性判断”，本申请对此不做具体限定)，此时，上述整个过程可以看成一轮CHO过程，在该轮CHO中，所有候选小区可能均不满足切换触发条件或终端设备在候选小区中所有满足切换触发条件的小区均接入失败。示例性的，以条件切换配置信息中配置了候选小区B、候选小区C和候选小区D，终端设备采用“一次性”判断为例，若终端设备首先判断出小区B不满足切换触发条件或小区B满足切换触发条件但终端设备在小区B接入失败，终端设备可以继续判断剩下的候选小区(如终端设备可以继续判断小区C或小区D)是否满足切换触发条件，若终端设备判断出小区D满足切换触发条件且终端设备在小区D成功接入，则终端设备不再判断小区C是否满足切换触发条件。或者，示例性的，条件切换配置信息中配置了候选小区B、候选小区C和候选小区D，若终端设备首先判断出小区B不满足切换触发条件或小区B 满足切换触发条件但终端设备在小区B接入失败，终端设备可以继续判断剩下的候选小区(如终端设备可以继续判断小区C或小区D)是否满足切换触发条件，若终端设备判断出小区D满足切换触发条件但终端设备在小区D接入失败或小区D不满足切换触发条件，则终端设备继续判断小区C是否满足切换触发条件。
或者，一种可能的实现方式中，终端设备根据条件切换配置信息判断候选小区中的小区是否满足切换触发条件时，至多进行N次判断，其中N可以是协议约定的，也可以是网络设备发送给终端设备的(如第一网络设备向终端设备发送的消息1中可以包含该N值，N是大于或等于1的整数)。在该实现方式中，若终端设备在配置的候选小区中的一个满足切换触发条件的小区接入失败后或者终端设备确定候选小区中的一个小区不满足切换触发条件后，可以继续进行后续的判断，即判断候选小区中的小区是否满足切换触发条件(此时，终端设备可以采用“轮询式”判断，也可以采用“一次性判断”，本申请对此不做具体限定)，直到下面情形中的任意一个情形出现，终端设备停止判断：1)终端设备判断的总次数达到N次，2)在判断次数达到N次之前，终端设备能够确定出满足切换触发条件的小区，并在该满足切换触发条件的小区成功接入。当N次判断都完成，终端设备不再进行判断，上述整个过程可以看成一轮CHO过程；或者，当终端设备判断的总次数并没有达到N次，在判断次数达到N次之前，终端设备能够确定出满足切换触发条件的小区，并在该满足切换触发条件的小区成功接入，则终端设备不再进行判断，上述整个过程可以看成一轮CHO过程。示例性的，以条件切换配置信息中配置了候选小区B、候选小区C和候选小区D，N为2，终端设备采用“一次性”判断为例，若终端设备首先判断出小区B不满足切换触发条件或小区B满足切换触发条件但终端设备在小区B接入失败，终端设备可以继续判断剩下的候选小区(如终端设备可以继续判断小区C或小区D)是否满足切换触发条件，若终端设备判断出小区C满足切换触发条件但终端设备在小区C接入失败或小区C不满足切换触发条件，终端设备不再判断小区D是否满足切换触发条件。或者，若终端设备首先判断出小区B满足切换触发条件且终端设备在小区B接入成功，即使N＝1，未达到2，终端设备也不再判断小区C或小区D是否满足切换触发条件。
或者，又一种可能的实现方式中，终端设备根据条件切换配置信息判断候选小区中的小区是否满足切换触发条件时，至多进行R次随机接入尝试，随机接入尝试指的是终端设备根据条件切换配置信息判断出某候选小区满足切换触发条件时，终端设备与该小区进行随机接入，尝试接入该小区：终端设备最多有R次进行随机接入尝试的机会，直到终端设备判断完所有的候选小区均不满足切换触发条件，或者，直到终端设备进行了所有的R次随机接入尝试，或者，直到终端设备未进行完所有的R次随机接入尝试但终端设备成功接入了满足切换触发条件的小区。其中R可以是协议约定的，也可以是网络设备发送给终端设备的，例如第一网络设备向终端设备发送的消息1中可以包含该R值，R是大于或等于1的整数，本申请实施例对此不做具体限定。在该实现方式中，若终端设备在配置的候选小区中的一个满足切换触发条件的小区接入失败后或者终端设备确定候选小区中的一个小区不满足切换触发条件后，可以继续进行后续的判断，即判断候选小区中的小区是否满足切换触发条件(此时，终端设备可以采用“轮询式”判断，也可以采用“一次性判断”，本申请对此不做具体限定)，直到下面情形中的任意一个情形出现，终端设备停止判断或者终止本轮CHO过程：1)终端设备进行随机接入尝试的总次数达到R次；2)在进行的随机接入尝试的总次数达到R次之前，终端设备能够确定出满足切换触发条件的小区，并在该满足切换触发条件的小区成功接入；3)配置的所有的候选小区均不满足切换触发条件。当所有的R次随机接入尝试都完成， 终端设备不再进行判断，上述整个过程可以看成一轮CHO过程；或者，终端设备进行的随机接入尝试的总次数并没有达到R次，在随机接入尝试的次数达到R次之前，终端设备能够确定出满足切换触发条件的小区，并在该满足切换触发条件的小区成功接入，则终端设备不再进行判断，上述整个过程可以看成一轮CHO过程；或者，终端设备判断出网络设备配置的所有的候选小区均不满足切换触发条件，即终端设备进行的随机接入尝试的总次数等于0，虽然随机接入尝试的总次数没有达到R，但终端设备不再进行判断，上述整个过程可以看成一轮CHO过程。示例性的，以条件切换配置信息中配置了候选小区B、候选小区C和候选小区D，R为2，终端设备采用“一次性”判断为例，若终端设备首先判断出小区B满足切换触发条件但终端设备在小区B接入失败，终端设备可以继续判断剩下的候选小区(如终端设备可以继续判断小区C或小区D)是否满足切换触发条件，若终端设备判断出小区C满足切换触发条件但终端设备在小区C接入失败，则终端设备停止判断，此时R＝2，本轮CHO过程结束。或者，若终端设备首先判断出小区B满足切换触发条件且终端设备在小区B接入成功，即使R＝1，未达到2，终端设备也停止判断，本轮CHO过程结束。或者，终端设备判断出候选小区B、候选小区C和候选小区D均不满足切换触发条件，则终端设备停止判断，此时R＝0，本轮CHO过程结束。
或者，又一种可能的实现方式中，终端设备根据条件切换配置信息判断候选小区中的小区是否满足切换触发条件时，只在收到条件切换配置信息后的H时长内进行判断，其中H可以是协议约定的，也可以是网络设备发送给终端设备的(如第一网络设备向终端设备发送的消息1中可以包含该H值)。在该实现方式中，若终端设备在配置的候选小区中的一个满足切换触发条件的小区接入失败后或者终端设备确定候选小区中的一个小区不满足切换触发条件后，可以在收到条件切换配置信息后的H时长内继续进行后续的判断，判断候选小区中的小区是否满足切换触发条件(此时，终端设备可以采用“轮询式”判断，也可以采用“一次性判断”，本申请对此不做具体限定)，直至超时或者在超时前终端设备能够确定出满足切换触发条件的小区，并在该满足切换触发条件的小区成功接入，则终端设备停止判断，上述整个过程可以看成一轮CHO过程。示例性的，以条件切换配置信息中配置了候选小区B、候选小区C和候选小区D，H为100s，终端设备采用“一次性”判断为例，若终端设备首先判断出小区B不满足切换触发条件或小区B满足切换触发条件但终端设备在小区B接入失败，终端设备可以在剩下的时间继续判断其他候选小区(如终端设备可以继续判断小区C或小区D)是否满足切换触发条件，若超时或者在超时前终端设备能够确定出满足切换触发条件的小区，并在该满足切换触发条件的小区成功接入，则终端设备停止判断。
可选的，上述终端设备判断候选小区是否满足切换触发条件的所有可能的实现方式中，终端设备的判断顺序可以是有规律的，例如，网络设备可以指定各候选小区的判断顺序或网络设备可以指定各候选小区的优先级，终端设备按照优先级对候选小区进行判断；或者协议规定终端设备对候选小区进行判断时的顺序；或者终端设备的判断顺序也可以是无规律的，例如，判断顺序取决于终端设备的实现，本申请实施例对此不做具体限定。
下面对S602中终端设备记录的MRO信息进行举例说明。具体的，以源小区为小区A，条件切换配置信息中配置了小区B和小区C两个候选小区，终端设备在配置的候选小区中的一个满足切换触发条件的小区接入失败后或者终端设备确定候选小区中的一个小区不满足切换触发条件后，继续判断候选小区中的小区是否满足切换触发条件，直到终端设备确定出满足切换触发条件的小区，并在该满足切换触发条件的小区成功接入，或者，直到终端设备判断完所有的候选小区是否满足切换触发条件为例，对不同场景下终端设备记录的MRO相关 信息进行详细说明。
需要说明的是，条件切换过程中可能存在，前提1：终端设备在接收到条件切换配置信息后可以保持和源小区的数据传输直到终端设备成功接入到目标小区或者源小区发生RLF；前提2：终端设备在接收到条件切换配置信息后立即断开与源小区的数据传输。下面不同场景中对一轮CHO过程中该两种前提下终端设备的连接状态分别进行了说明。
场景一、小区B为候选目标小区，小区C为待定小区。终端设备在小区B接入失败。
可选的，该场景下，终端设备可以根据条件切换配置信息，确定小区B满足切换触发条件。进而，终端设备与小区B进行随机接入过程，但是终端设备与小区B进行的随机接入过程发生失败；或者终端设备成功接入小区B后在小区B发生RLF。另外，终端设备根据条件切换配置信息判断出小区C不满足切换触发条件。
在该场景一中，终端设备根据当前接收到的条件切换配置信息进行的本轮CHO过程中，由于终端设备在小区B接入失败，小区C不满足切换触发条件，因此本轮CHO过程中最终为终端设备提供服务的小区(或者可以理解为本轮CHO过程中最终与终端设备之间存在(或者建立，或者维持)RRC连接的小区)，可能存在以下四种情况：
①在前提1的情况下，若终端设备在小区B接入失败且判断出小区C不满足切换触发条件，且终端设备在源小区A发生RLF(如源小区A的信号质量变差)，则终端设备发起重建立流程，与选择出的合适的新小区(如满足S准则的小区)D进行RRC重建立流程。
②在前提2的情况下，若终端设备在小区B接入失败且判断出小区C不满足切换触发条件，则终端设备发起重建立流程，与选择出的合适的新小区(如满足S准则的小区)D进行RRC重建立流程。
③在前提1的情况下，若终端设备在小区B接入失败且判断出小区C不满足切换触发条件，且源小区A的信号质量较好，终端设备未在源小区A发生RLF，即终端设备与源小区A(或源网络设备)间仍然保持RRC连接。
④在前提2的情况下，若终端设备在小区B接入失败且判断出小区C不满足切换触发条件，则终端设备发起重建立，且重建立过程选择出的合适的小区为源小区A，则终端设备与源小区A进行RRC重建立流程。
需要说明的是，本申请实施例中，终端设备选择出的合适的新小区D可以与源小区A是同一个小区，也可以与源小区A是不同的小区，本申请对此不做具体限定。另外，终端设备选择出的合适的新小区D可以与候选小区(如小区B或小区C)是同一个小区，也可以与候选小区是不同的小区，本申请对此不做具体限定。
在上述场景一的情况①中，终端设备记录的MRO相关信息包括：小区B对应的第一失败原因值和小区C对应的第二失败原因值。其中，第一失败原因值的相关描述可参考上述实施例中对于第一失败原因值的描述，第二失败原因值的相关描述可参考上述实施例中对于第二失败原因值的描述，在此不再赘述。
可选的，在该场景一的情况①中，终端设备记录的MRO相关信息还可以包括上述第一信息中的以下一项或多项：源小区的信息、候选目标小区的信息、候选目标小区中每个小区对应的第一时间信息、待定小区的信息、待定小区中每个小区对应的第二时间信息、本轮CHO过程中最终为终端设备提供服务的小区(或者，理解为本轮CHO过程中最终与终端设备之间存在(或者建立，或者维持)RRC连接的小区)的信息、候选目标小区的UL载波信息。具体的，在该场景一的情况①中，源小区为小区A，候选目标小区为小区B，待定小区为小区C，最终为终端设备提供服务的小区(或者，理解为本轮CHO过程中最终与终端设备之间存 在(或者建立)RRC连接的小区)为小区D，相关信息的具体描述可参考上述实施例中相应信息的描述，此处不再赘述。
在该场景一的情况②中，最终为终端设备提供服务的小区(或者，理解为本轮CHO过程中最终与终端设备之间存在(或者建立)RRC连接的小区)为小区D，终端设备记录的MRO相关信息与该场景一的情况①中记录的MRO相关信息相同，相关描述可参考该场景一的情况①的描述，此处不再赘述。
在该场景一的情况③中，最终为终端设备提供服务的小区(或者，理解为本轮CHO过程中最终与终端设备之间存在(或者维持)RRC连接的小区)为小区A，终端设备记录的MRO信息与该场景一的情况①中记录的MRO相关信息类似，区别在于，在场景一的情况③中记录的终端设备本轮CHO过程中最终为终端设备提供服务的小区的信息为源小区A的信息，而不是小区D的信息。相关描述可参考上述场景一的情况①的描述，此处不再赘述。
在上述场景一的情况④中，最终为终端设备提供服务的小区(或者，理解为本轮CHO过程中最终与终端设备之间存在(或者建立)RRC连接的小区)为小区A，终端设备记录的MRO信息与上述场景一的情况③中记录的MRO相关信息相同，相关描述可参考上述场景一的情况③的描述，此处不再赘述。
场景二、小区B为候选目标小区。终端设备在小区B接入失败，在小区C接入成功。
可选的，该场景下，终端设备根据条件切换配置信息，确定小区B满足切换触发条件。进而，终端设备与小区B进行随机接入过程，但是终端设备与小区B进行的随机接入过程发生失败；或者终端设备成功接入小区B后在小区B发生RLF。另外，终端设备根据条件切换配置信息判断出小区C满足切换触发条件，则终端设备与小区C进行随机接入过程，且终端设备与小区C进行的随机接入过程成功，终端设备成功切换至小区C。
在该场景二中，终端设备记录的MRO相关信息包括：小区B对应的第一失败原因值。其中，第一失败原因值的相关描述可参考上述实施例中对于第一失败原因值的描述，在此不再赘述。
可选的，在该场景二中，终端设备记录的MRO相关信息还可以包括上述第一信息中以下信息中的一项或多项：源小区的信息、候选目标小区的信息、候选目标小区中每个小区对应的第一时间信息、本轮CHO过程中最终为终端设备提供服务的小区(或者，理解为本轮CHO过程中最终与终端设备之间存在(或者建立，或者维持)RRC连接的小区)的信息、候选目标小区的UL载波信息，具体的，在该场景二中，源小区为小区A，候选目标小区包括小区B，本轮CHO过程中最终为终端设备提供服务的小区(或者，理解为本轮CHO过程中最终与终端设备之间存在(或者建立)RRC连接的小区)为小区C，相关信息的具体描述可参考上述实施例中相应信息的描述，此处不再赘述。
场景三、小区B和小区C为候选目标小区。终端设备在小区B和小区C都接入失败。
可选的，该场景下，终端设备根据条件切换配置信息，确定小区B满足切换触发条件。进而，终端设备与小区B进行随机接入过程，但是终端设备与小区B进行的随机接入过程发生失败，或者终端设备成功接入小区B后在小区B发生RLF。此外，终端设备根据条件切换配置信息确定小区C满足切换触发条件，进而，终端设备与小区C进行随机接入过程，但是终端设备与小区C进行的随机接入过程发生失败；或者终端设备成功接入小区C后在小区B发生RLF。
在该场景三中，终端设备根据当前接收到的条件切换配置信息进行的本轮CHO过程中，由于终端设备在小区B和小区C均接入失败，因此本轮CHO过程中最终为终端设备提供服 务的小区(或者可以理解为终端设备确定本轮CHO过程中最终与终端设备之间存在(或者建立，或者维持)RRC连接的小区)，可能存在以下四种情况：
①在前提1的情况下，若终端设备在小区B接入失败且终端设备在小区C接入失败，且终端设备在源小区A发生RLF(如源小区A的信号质量变差)，则终端设备发起重建立流程，与选择出的合适的新小区(如满足S准则的小区)D进行RRC重建立流程。
②在前提2的情况下，若终端设备在小区B接入失败且终端设备在小区C接入失败，则终端设备发起重建立流程，与选择出的合适的新小区(如满足S准则的小区)D进行RRC重建立流程。
③在前提1的情况下，若终端设备在小区B接入失败且终端设备在小区C接入失败，且源小区A的信号质量较好，终端设备未在源小区A发生RLF，即终端设备与源小区A(或源网络设备)间仍然保持RRC连接。④在前提2的情况下，若终端设备在小区B接入失败且终端设备在小区C接入失败，则终端设备发起重建立，且重建立过程选择出的合适的小区恰好为源小区A，则终端设备与源小区A进行RRC重建立流程。
④在前提2的情况下，若终端设备在小区B接入失败且终端设备在小区C接入失败，则终端设备发起重建立，且重建立过程选择出的合适的小区为源小区A，则终端设备与源小区A进行RRC重建立流程。
在该场景三的情况①中，终端设备记录的MRO相关信息包括：小区B对应的第一失败原因值和小区C对应的第一失败原因值。其中，第一失败原因值的相关描述可参考上述实施例中对于第一失败原因值的描述，在此不再赘述。
可选的，在该场景三的情况①中，终端设备记录的MRO相关信息还可以包括上述第一信息中以下信息中的一项或多项：源小区的信息、候选目标小区的信息、候选目标小区中每个小区对应的第一时间信息、本轮CHO过程中最终为终端设备提供服务的小区(或者，理解为本轮CHO过程中最终与终端设备之间存在(或者建立，或者维持)RRC连接的小区)的信息、候选目标小区的UL载波信息。具体的，在该场景三的情况①中，源小区为小区A，候选目标小区包括小区B和小区C，本轮CHO过程中最终为终端设备提供服务的小区(或者，理解为本轮CHO过程中最终与终端设备之间存在(或者建立)RRC连接的小区)为小区D，相关信息的具体描述可参考上述实施例中对相应信息的描述，在此不再赘述。
在该场景三的情况②中，最终为终端设备提供服务的小区(或者，理解为本轮CHO过程中最终与终端设备之间存在(或者建立)RRC连接的小区)为小区D，终端设备记录的MRO相关信息与该场景三的情况①中记录的MRO相关信息相同，相关描述可参考该场景三的情况①的描述，此处不再赘述。
在该场景三的情况③中，最终为终端设备提供服务的小区(或者，理解为本轮CHO过程中最终与终端设备之间存在(或者维持)RRC连接的小区)为小区A，终端设备记录的MRO信息与该场景三的情况①中记录的MRO相关信息类似，区别在于，在场景三的情况③中记录的本轮CHO过程中最终为终端设备提供服务的小区的信息为源小区A的信息，而不是小区D的信息。相关描述可参考该场景三的情况①的描述，此处不再赘述。
在上述场景三的情况④中，最终为终端设备提供服务的小区(或者，理解为本轮CHO过程中最终与终端设备之间存在(或者建立)RRC连接的小区)为小区A，终端设备记录的MRO信息与上述场景三的情况③中记录的MRO相关信息相同，相关描述可参考上述场景三的情况③的描述，此处不再赘述。
场景四、小区B和小区C为待定小区，即小区B和小区C均不满足切换触发条件。
具体的，终端设备根据条件切换配置信息，确定小区B不满足切换触发条件后，继续判断小区C是否满足切换触发条件，终端设备确定小区C也不满足切换触发条件。
在该场景四中，终端设备根据当前接收到的条件切换配置信息进行的本轮CHO过程中，由于小区B和小区C均不满足切换触发条件，因此本轮CHO过程中最终为终端设备提供服务的小区(或者可以理解为本轮CHO过程中最终与终端设备之间存在(或者建立，或者维持)RRC连接的小区)，可能存在以下四种情况：
①在前提1的情况下，若终端设备确定小区B不满足切换触发条件且小区C不满足切换触发条件，且终端设备在源小区A发生RLF(如源小区A的信号质量变差)，则终端设备发起重建立流程，与选择出的合适的新小区(如满足S准则的小区)D进行RRC重建立流程。
②在前提2的情况下，若终端设备确定小区B不满足切换触发条件且小区C不满足切换触发条件，则终端设备发起重建立流程，与选择出的合适的新小区(如满足S准则的小区)D进行RRC重建立流程。
③在前提1的情况下，若终端设备确定小区B不满足切换触发条件且小区C不满足切换触发条件，且源小区A的信号质量较好，终端设备未在源小区A发生RLF，即终端设备与源小区A(或源网络设备)间仍然保持RRC连接。
④在前提2的情况下，若终端设备确定小区B不满足切换触发条件且小区C不满足切换触发条件，则终端设备发起重建立，且重建立过程选择出的合适的小区为源小区A，则终端设备与源小区A进行RRC重建立流程。
在该场景四的情况①中，终端设备记录的MRO相关信息包括：小区B对应的第二失败原因值和小区C对应的第二失败原因值。其中，第二失败原因值的相关描述可参考上述实施例中对于第二失败原因值的描述，在此不再赘述。
可选的，在该场景四的情况①中，终端设备记录的MRO相关信息还可以包括上述第一信息中以下信息中的一项或多项：源小区的信息、待定小区的信息、待定小区中每个小区对应的第二时间信息、本轮CHO过程中最终为终端设备提供服务的小区(或者，理解为本轮CHO过程中最终与终端设备之间存在(或者建立，或者维持)RRC连接的小区)的信息，具体的，在该场景四的情况①中，源小区为小区A，待定小区包括小区B和小区C，本轮CHO过程中最终为终端设备提供服务的小区(或者，理解为本轮CHO过程中最终与终端设备之间存在(或者建立)RRC连接的小区)为小区D，相关信息的描述可参考上述实施例中对相应信息的描述，在此不再赘述。
在该场景四的情况②中，最终为终端设备提供服务的小区(或者，理解为本轮CHO过程中最终与终端设备之间存在(或者建立)RRC连接的小区)为小区D，终端设备记录的MRO相关信息与该场景四的情况①中记录的MRO相关信息相同，相关描述可参考上述场景四的情况①的描述，此处不再赘述。
在该场景四的情况③中，最终为终端设备提供服务的小区(或者，理解为本轮CHO过程中最终与终端设备之间存在(或者维持)RRC连接的小区)为小区A，终端设备记录的MRO信息与该场景四的情况①中记录的MRO相关信息类似，区别在于，在场景四的情况③中记录的本轮CHO过程中最终为终端设备提供服务的小区的信息为源小区A的信息，而不是小区D的信息。相关描述可参考该场景四的情况①的描述，此处不再赘述。
在该场景四的情况④中，最终为终端设备提供服务的小区(或者，理解为本轮CHO过程中最终与终端设备之间存在(或者建立)RRC连接的小区)为小区A，终端设备记录的MRO信息与该场景四的情况③中记录的MRO相关信息相同，相关描述可参考该场景四的情况③ 的描述，此处不再赘述。
上述四种场景中，终端设备在配置的候选小区中的一个满足切换触发条件的小区接入失败后或者终端设备确定候选小区中的一个小区不满足切换触发条件后，继续判断候选小区中的小区是否满足切换触发条件，直到终端设备确定出满足切换触发条件的小区，并在该满足切换触发条件的小区成功接入，或者，直到终端设备判断完所有的候选小区是否满足切换触发条件。下面以终端设备根据条件切换配置信息判断候选小区中的小区是否满足切换触发条件时，至多进行N次判断，具体的N为1，源小区为小区A，条件切换配置信息中配置了候选小区B和候选小区C两个候选小区为例，对不同场景下终端设备记录的MRO相关信息进行详细说明。
需要说明的是，终端设备至多进行N次判断时，其选择的进行判断的候选小区可以是随机的，也可以是按照预设规则选择的，该预设规则可以是协议规定的，也可以是网络设备配置的，本申请对此不做具体限定。
场景五、小区B为候选目标小区。终端设备在小区B接入失败。
具体的，终端设备根据条件切换配置信息，确定小区B满足切换触发条件。进而，终端设备与小区B进行随机接入过程，但是终端设备与小区B进行的随机接入过程发生失败；或者终端设备成功接入小区B后在小区B发生RLF。此时，由于N等于1，即终端设备至多进行一次判断，因此，终端设备不再判断小区C是否满足切换触发条件。
在该场景五中，终端设备根据当前接收到的条件切换配置信息进行的本轮CHO过程中，由于终端设备进行一次判断后，在小区B接入失败，因此本轮CHO过程中最终为终端设备提供服务的小区(或者可以理解为本轮CHO过程中最终与终端设备之间存在(或者建立，或者维持)RRC连接的小区)，可能存在以下四种情况：
①在前提1的情况下，若终端设备在小区B接入失败且终端设备在源小区A发生RLF(如源小区A的信号质量变差)，则终端设备发起重建立流程，与选择出的合适的新小区(如满足S准则的小区)D进行RRC重建立流程。
②在前提2的情况下，若终端设备在小区B接入失败，则终端设备发起重建立流程，与选择出的合适的新小区(如满足S准则的小区)D进行RRC重建立流程。
③在前提1的情况下，若终端设备在小区B接入失败且源小区A的信号质量较好，终端设备未在源小区A发生RLF，即终端设备与源小区A(或源网络设备)间仍然保持RRC连接。
④在前提2的情况下，若终端设备在小区B接入失败，则终端设备发起重建立，且重建立过程选择出的合适的小区为源小区A，则终端设备与源小区A进行RRC重建立流程。
在该场景五的情况①中，终端设备记录的MRO相关信息包括：小区B对应的第一失败原因值。其中，第一失败原因值的相关描述可参考上述实施例中对于第一失败原因值的描述，在此不再赘述。
可选的，在该场景五的情况①中，终端设备记录的MRO相关信息还可以包括上述第一信息中以下信息中的一项或多项：源小区的信息、候选目标小区的信息、候选目标小区中每个小区对应的第一时间信息、本轮CHO过程中最终为终端设备提供服务的小区(或者，理解为本轮CHO过程中最终与终端设备之间存在(或者建立，或者维持)RRC连接的小区)的信息、候选目标小区的UL载波信息。具体的，在该场景五的情况①中，源小区为小区A，候选目标小区包括小区B，本轮CHO过程中最终为终端设备提供服务的小区(或者，理解为本轮CHO过程中最终与终端设备之间存在(或者建立)RRC连接的小区)为小区D，相关 信息的描述可参考上述实施例中对相应信息的描述，在此不再赘述。
在该场景五的情况②中，最终为终端设备提供服务的小区(或者，理解为本轮CHO过程中最终与终端设备之间存在(或者建立)RRC连接的小区)为小区D，终端设备记录的MRO相关信息与该场景五的情况①中记录的MRO相关信息相同，相关描述可参考上述场景五的情况①的描述，此处不再赘述。
在该场景五的情况③中，最终为终端设备提供服务的小区(或者，理解为本轮CHO过程中最终与终端设备之间存在(或者维持)RRC连接的小区)为小区A，终端设备记录的MRO信息与该场景五的情况①中记录的MRO相关信息类似，区别在于，在场景五的情况③中记录的本轮CHO过程中最终为终端设备提供服务的小区的信息为源小区A的信息，而不是小区D的信息。相关描述可参考该场景五的情况①的描述，此处不再赘述。
在该场景五的情况④中，最终为终端设备提供服务的小区(或者，理解为本轮CHO过程中最终与终端设备之间存在(或者建立)RRC连接的小区)为小区A，终端设备记录的MRO信息与该场景五的情况③中记录的MRO相关信息相同，相关描述可参考该场景五的情况③的描述，此处不再赘述。
场景六、小区B为待定小区，即小区B不满足切换触发条件。
具体的，终端设备根据条件切换配置信息，确定出小区B不满足切换触发条件，此时，由于N等于1，即终端设备至多进行一次判断，因此，终端设备不再判断小区C是否满足切换触发条件。
在该场景六中，终端设备根据当前接收到的条件切换配置信息进行的本轮CHO过程中，由于终端设备进行一次判断后，确定小区B不满足切换触发条件，因此本轮CHO过程中最终为终端设备提供服务的小区(或者可以理解为本轮CHO过程中最终与终端设备之间存在(或者建立，或者维持)RRC连接的小区)，可能存在以下四种情况：①在前提1的情况下，若小区B不满足切换触发条件且终端设备在源小区A发生RLF(如源小区A的信号质量变差)，则终端设备发起重建立流程，与选择出的合适的新小区(如满足S准则的小区)D进行RRC重建立流程。
②在前提2的情况下，若小区B不满足切换触发条件，则终端设备发起重建立流程，与选择出的合适的新小区(如满足S准则的小区)D进行RRC重建立流程。
③在前提1的情况下，若小区B不满足切换触发条件且源小区A的信号质量较好，终端设备未在源小区A发生RLF，即终端设备与源小区A(或源网络设备)间仍然保持RRC连接。
④在前提2的情况下，若小区B不满足切换触发条件，则终端设备发起重建立，且重建立过程选择出的合适的小区为源小区A，则终端设备与源小区A进行RRC重建立流程。
在该场景六的情况①中，终端设备记录的MRO相关信息包括：小区B对应的第二失败原因值。其中，第二失败原因值的相关描述可参考上述实施例中对于第二失败原因值的描述，在此不再赘述。
可选的，在该场景六的情况①中，终端设备记录的MRO相关信息还可以包括上述第一信息中以下信息中的一项或多项：源小区的信息、待定小区的信息、待定小区中每个小区对应的第二时间信息、本轮CHO过程中最终为终端设备提供服务的小区(或者，理解为本轮CHO过程中最终与终端设备之间存在(或者建立，或者维持)RRC连接的小区)的信息，具体的，在该场景六的情况①中，源小区为小区A，待定小区为小区B，本轮CHO过程中最终为终端设备提供服务的小区(或者，理解为本轮CHO过程中最终与终端设备之间存在(或者 建立)RRC连接的小区)为小区D，相关信息的描述可参考上述实施例中对相应信息的描述，在此不再赘述。
在该场景六的情况②中，最终为终端设备提供服务的小区(或者，理解为本轮CHO过程中最终与终端设备之间存在(或者建立)RRC连接的小区)为小区D，终端设备记录的MRO相关信息与该场景六的情况①中记录的MRO相关信息相同，相关描述可参考该场景六的情况①的描述，此处不再赘述。
在该场景六的情况③中，最终为终端设备提供服务的小区(或者，理解为本轮CHO过程中最终与终端设备之间存在(或者维持)RRC连接的小区)为小区A，终端设备记录的MRO信息与该场景六的情况①中记录的MRO相关信息类似，区别在于，在场景六的情况③中记录的本轮CHO过程中最终为终端设备提供服务的小区的信息为源小区A的信息，而不是小区D的信息。相关描述可参考该场景六的情况①的描述，此处不再赘述。
在该场景六的情况④中，最终为终端设备提供服务的小区(或者，理解为本轮CHO过程中最终与终端设备之间存在(或者建立)RRC连接的小区)为小区A，终端设备记录的MRO信息与该场景六的情况③中记录的MRO相关信息相同，相关描述可参考该场景六的情况③的描述，此处不再赘述。
其中，在上述S602中：
一种可能的实现方式中，终端设备自身触发MRO相关信息的发送。示例性的，终端设备根据接收到的条件切换配置信息，成功切换到满足切换触发条件的候选小区，则终端设备可以将本轮CHO过程中记录的MRO相关信息发送给本轮CHO过程中最终为终端设备提供服务的小区所属的网络设备，例如，上述场景二中，终端设备成功切换到候选小区C，则终端设备可以将本轮CHO过程中记录的MRO相关信息发送给小区C所属的网络设备。可选地，本轮CHO过程最终为终端设备提供服务的小区所属的网络设备可以将从终端设备接收到的MRO相关信息发送给源网络设备，例如，上述场景二中，小区C所属的网络设备将从终端设备接收到的MRO相关信息发送给小区A所属的网络设备(即源网络设备)；
或者，示例性的，终端设备根据接收到的条件切换配置信息，未能成功切换到候选小区时，若终端设备发起重建立流程，且重建立成功，即本轮CHO过程中最终为终端设备提供服务的小区为重建立小区，则终端设备可以将本轮CHO过程中记录的MRO相关信息发送给本轮CHO过程中最终为终端设备提供服务的小区所属的网络设备，例如，在上述场景一的情况①或上述场景一的情况②中，终端设备在小区D重建立成功，则终端设备可以将本轮CHO过程中记录的MRO相关信息发送给小区D所属的网络设备。可选地，本轮CHO过程中最终为终端设备提供服务的小区所属的网络设备可以将从终端设备接收到的MRO相关信息发送给源网络设备，例如，上述场景一的情况①或上述场景一的情况②中，小区D所属的网络设备将从终端设备接收到的MRO相关信息发送给小区A所属的网络设备(即源网络设备)；
或者，示例性的，终端设备根据接收到的条件切换配置信息，未能成功切换到候选小区时，若终端设备保持在源小区，即本轮CHO过程中最终为终端设备提供服务的小区为源小区，则终端设备可以将本轮CHO过程中记录的MRO相关信息发送给本轮CHO过程中最终为终端设备提供服务的小区所属的网络设备，例如，上述场景一的情况③中，终端设备进行本轮CHO后保持在源小区，则终端设备可以将本轮CHO过程中记录的MRO相关信息发送给小区A所属的网络设备(即源网络设备)。网络设备根据接收到的MRO相关信息可以进行条件切换相关参数的调整。
另一种可能的实现方式中，终端设备接收到第二网络设备发送的请求消息后，例如，该 请求消息可以是用户信息请求UEInformationRequest消息，触发MRO相关信息的发送。下文对此实现方式，进行具体说明。
可选的，本申请实施例中，若终端设备具备记录MRO相关信息的能力，则终端设备可以向第二网络设备发送第三指示信息，第三指示信息用于通知第二网络设备，终端设备具备记录MRO相关信息的能力。其中，第三指示信息可以包含在RRC消息中，该RRC消息例如可以是RRC建立完成消息或者RRC重配置完成消息或者RRC重建立完成消息或者其他RRC消息，本申请实施例对此不做具体限定；或者，第三指示信息可以包含在物理层消息(如上行控制信息(uplink control information，UCI))或媒体接入控制(media access control，MAC)层消息(如媒体接入控制元素(MAC control element，MAC CE))中，本申请实施例对此不做具体限定。对于第三指示信息的发送时机，例如，一种可能的实现方式中，可以在重建立成功，终端设备发送RRC重建立完成消息时，发送该第三指示信息，或者，另一种可能的实现方式中，可以在条件切换执行成功，终端设备向成功接入的网络设备发送RRC重配置完成消息时，发送该第三指示信息，本申请实施例对此不作限定。
可选的，本申请实施例中，第三指示信息可以是二进制数值，例如，“1”表示终端设备具备记录MRO相关信息的能力，“0”表示终端设备不具备记录MRO相关信息的能力；或者，第三指示信息可以是布尔值，例如，“TRUE”表示终端设备具备记录MRO相关信息的能力，“FALSE”表示终端设备不具备记录MRO相关信息的能力；或者，第三指示信息可以是某信元，例如，该信元可以是移动鲁棒性优化能力(如MRO capability)，或者该信元可以是其他表达或命名方式，本申请实施例不做具体限定，当终端设备发送的消息中包含该信元，则表示终端设备具备记录MRO相关信息的能力，如果终端设备发送的消息中不包含该信元，则表示终端设备不具备记录MRO相关信息的能力。
其中，第二网络设备接收来自终端设备的第三指示信息之后，可以向终端设备发送请求消息，用于请求终端设备上报MRO的相关信息，例如，该请求消息可以是UEInformationRequest消息。
可选的，本申请实施例中，第二网络设备可以在接收到终端设备发送的上述第三指示信息后向该终端设备发送上述请求消息，或者，第二网络设备也可以在未收到该第三指示信息的情况下向终端设备发送上述请求消息，也就是说，是否接收到该第三指示信息不是第二网络设备发送上述请求消息的必要条件。本申请实施例对此不作具体限定。
一种可能的方式中，第二网络设备可以为终端设备根据当前接收的条件切换配置信息判断出的满足切换触发条件且成功接入的小区所属的网络设备。如条件切换配置信息中配置了小区B和小区C两个候选小区，终端设备根据条件切换配置信息，确定出小区C满足切换触发条件且终端设备在小区C接入成功，则小区C所属的网络设备即为第二网络设备。
另一种可能的实现方式中，第二网络设备为终端设备接收到条件切换配置信息后，终端设备发起重建立的小区所属的网络设备。例如，终端设备根据当前接收到的条件切换配置信息，判断出配置的M个候选小区均不满足切换触发条件，或者，配置的M个候选小区中存在至少一个小区满足切换触发条件但是终端设备在满足切换触发条件的该至少一个小区接入失败，或者，存在其他情况，终端设备发起重建立流程，终端设备确定出的进行重建立的小区所属的网络设备即为第二网络设备。例如，终端设备根据S准则选择出合适的新小区E，与该小区E进行RRC重建立流程，并在小区E重建立成功，则小区E所属的网络设备为第二网络设备。
又一种可能的方式中，第二网络设备可以为终端设备接收条件切换配置信息后，后续接 入成功的小区所属的网络设备。例如，终端设备根据当前接收的条件切换配置信息判断出满足切换触发条件的小区并且成功切换至该小区后，后续可能由于继续移动或发起重建立或其他原因，接入到另外的网络设备，该网络设备接收到终端设备发送的上述第三指示信息，或者，该网络设备向终端设备发送上述请求终端设备上报MRO的相关信息的请求消息，则该网络设备为第二网络设备。
又一种可能的方式中，终端设备接收到条件切换配置信息后，发起重建立流程，重建立成功后，后续可能由于继续移动或发起重建立或其他原因，接入到其他网络设备，该其他网络设备接收到终端设备发送的上述第三指示信息，或者，该其他网络设备向终端设备发送上述请求消息(例如，向终端设备发送UEInformationRequest消息)，则该其他网络设备为第二网络设备。示例性的，条件切换配置信息中配置了两个候选小区(如小区B和小区C)，终端设备根据条件切换配置信息，确定出小区C满足切换触发条件且终端设备在小区C接入成功，终端设备成功切换至小区C后，小区C所属的网络设备没有给UE发送UEInformationRequest消息，因此，终端设备没有向小区C所属的网络设备发送MRO相关信息，后续由于继续移动或发起重建立或其他原因，终端设备成功接入到小区F，在收到小区F所属的网络设备发送的请求消息(如UEInformationRequest消息)后，终端设备向小区F所属的网络设备发送MRO相关信息。
可选的，本申请实施例中，MRO相关信息中候选目标小区对应的第一失败原因值，和/或，待定小区对应的第二失败原因值可以通过一条RRC消息发送，例如，该RRC消息可以是UEInformationReponse消息，本申请实施例对此不做具体限定。一种实现方法中，终端设备通过消息2发送候选目标小区对应的第一失败原因值，和/或，待定小区对应的第二失败原因值，该消息2可以是一条RRC消息，例如可以是UEInformationReponse消息。可选的，消息2中还可以包括MRO相关信息中的第一信息，即第一信息与候选目标小区对应的第一失败原因值，和/或，待定小区对应的第二失败原因值可以通过同一条RRC消息发送。其中，第一信息的相关描述可参考上文对第一信息的描述，此处不再赘述。当然，第一信息也可以是通过另外的一个RRC消息发送，如消息3，即第一信息与候选目标小区对应的第一失败原因值，和/或，待定小区对应的第二失败原因值可以通过不同的RRC消息发送，该消息3可以是一条RRC消息，例如可以是UEInformationReponse消息，本申请实施例对此不做具体限定。可选的，本申请实施例中，消息2中还可以包括上述MRO相关信息中的第二信息。其中，第二信息的相关描述可参考上文对第二信息的描述，在此不再赘述。当然，也可以将上述第二信息包括在消息3中。将上述第二信息包含在消息2或消息3中时，第二信息可以与发生条件切换失败时的相关信息同时发送，即第二信息可以与第一信息、候选目标小区对应的第一失败原因值，和/或，待定小区对应的第二失败原因值通过同一条消息发送。可选的，上述第二信息也可以单独发送，如终端设备向第二网络设备发送消息4，消息4中包括上述第二信息。该消息4可以是一条RRC消息，例如可以是UEInformationReponse消息，本申请实施例对此不做具体限定。
可选的，本申请实施例中，单独发送第二信息时，存在一种可能的情况，即终端设备判断出候选小区中的某个小区满足切换触发条件，并且与该小区进行的随机接入过程成功，终端设备成功接入至该小区，例如在配置了B和小区C两个候选小区的情况下，终端设备接收到条件切换配置信息后，判断出小区B满足切换触发条件，并在小区B接入成功，终端设备成功切换至小区B后，可以认为此轮CHO过程结束。在此轮CHO过程中，终端设备可以记录小区B的相关信息，由于在小区B接入成功，终端设备可能并没有判断小区C是否满足切 换触发条件，即终端设备没有记录小区C的相关信息。在该情况下，本轮CHO过程中，终端设备不会记录条件切换失败的相关信息，也就是说，终端设备可能不会向第二网络设备发送条件切换失败的相关信息，即终端设备不会向第二网络设备发送消息2或消息3，例如，终端设备不会向第二网络设备发送小区C的相关信息，而是向第二网络设备发送上述第二信息，即终端设备向第二网络设备发送消息4，例如，终端设备向第二网络设备发送小区B的相关信息。
可选的，本申请实施例中，在条件切换机制和传统切换机制共存时，消息2或消息3或消息4中还可以包括上述MRO信息中的第三信息或第四信息。其中，第三信息和第四信息的相关描述可参考上文中相应信息的描述。即终端设备可以将传统切换失败的相关信息与条件切换过程中的相关信息一起发送，即第三信息、第四信息可以与第一信息、第二信息、候选目标小区对应的第一失败原因值，和/或，待定小区对应的第二失败原因值通过同一条消息发送；或者，终端设备可以通过一条新的消息(除消息2、消息3、消息4外的消息)发送传统切换失败的相关信息，即终端设备可以将切换失败的相关信息与条件切换过程中的相关信息分开独立发送，本申请对此不做具体限定。
可选的，本申请实施例中，终端设备发送上述MRO相关信息时，如终端设备发送候选目标小区对应的第一失败原因值，和/或，待定小区对应的第二失败原因值、第一信息、第二信息、第三信息、第四信息中的一项或多项，可以是以终端设备为粒度发送的，也可以是以小区为粒度发送的，本申请对此不做具体限定。示例性的，以上述MRO信息均包含在消息2中，且该消息2为RRC消息为例进行说明。终端设备在发送上述信息时，可以通过一条消息2发送，也就是说，终端设备将其记录的源小区、各个候选目标小区，和/或，待定小区、第一目标小区以及本轮CHO过程中最终为终端设备提供服务的小区的MRO相关信息通过一条消息2发送，即该消息2是终端设备粒度的；例如，在上述S601的场景三的情况①中，若终端设备通过一条消息2发送本轮CHO过程中的MRO相关信息，则该消息2中包括小区B和小区C对应的第一失败原因值、小区B的信息、小区C的信息、小区B对应的第一时间信息、小区C对应的第一时间信息、小区D的信息以及小区A的信息。其中，对于第一失败原因值，该消息2中可以只包括一个第一失败原因值，即这个第一失败原因值对应小区B且对应小区C；或者该消息2中可以包括两个第一失败原因值即这两个第一失败原因值分别对应小区B和小区C，本申请实施例对此不做具体限定；其中，小区A(或小区B或小区C或小区D)的信息包括小区A(或小区B或小区C或小区D)的小区标识信息，和/或，小区A(或小区B或小区C或小区D)的小区信号质量信息。
或者，示例性的，终端设备也可以分多条消息2发送上述MRO信息，也就是说，终端设备可以将其记录的各个候选目标小区，和/或，待定小区、第一目标小区的MRO相关信息以小区为单位分别发送各个小区对应的MRO相关信息，即该消息2是小区粒度的。需要说明的是，消息2以小区为粒度时，源小区的信息以及本轮CHO过程中最终为终端设备提供服务的小区的信息可以单独发送，也可以同候选目标小区或待定小区的MRO相关信息一起发送，本申请对此不做具体限定。例如，在上述S601的场景三的情况①中，对于小区B和小区C，终端设备可以通过一条消息2a发送小区B的相关信息，该消息2a中包含小区B对应的第一失败原因值和小区B对应的其他MRO相关信息(例如，小区B的信息、小区B对应的第一时间信息)，且终端设备可以通过另一条消息2b发送小区C的相关信息，该消息2b中包含小区C对应的第一失败原因值和小区C对应的其他MRO相关信息(例如，小区C的信息、小区C对应的第一时间信息)，对于源小区A和重建立小区D，小区A的相关信息(例如，小 区A的信息)可以通过另一条消息2c或者通过消息2a或者通过消息2b发送，小区D的相关信息(例如，小区D的信息)可以通过另一条消息2d或者通过消息2a或者通过消息2b或者通过消息2c发送，本申请实施例对此不做具体限定。其中，小区A(或小区B或小区C或小区D)的信息包括小区A(或小区B或小区C或小区D)的小区标识信息，和/或，小区A(或小区B或小区C或小区D)的小区信号质量信息。
其中，在上述S603中：
需要说明的是，当向终端设备发送上述请求终端设备上报MRO相关信息的网络设备为源小区所属的网络设备时，第二网络设备和第一网络设备为同一个网络设备，此时，不需要执行S603。
可选的，本申请实施例中，第二网络设备向第一网络设备发送MRO相关信息时，可以将MRO相关信息包含在一条消息中发送，也可以将MRO相关信息包括的不同内容通过不同的消息发送，或者，可以理解为，发送MRO相关信息时，可以以终端设备为粒度进行发送，也可以以小区为粒度进行发送，本申请实施例对此不做具体限定，相关描述可参考S602中的相应描述，在此不再赘述。
可选的，本申请实施例中，对于第一失败原因值对应的候选目标小区，接入失败的一种可能是该候选目标小区的信号质量一直较差或者该候选目标小区的信号质量衰减快或者信号质量不稳定，第二网络设备接收到该候选目标小区对应的第一失败原因值后，将接收到的该候选目标小区对应的第一失败原因值发送给第一网络设备。
第一网络设备在接收到第一失败原因值后，可以根据该第一失败原因值进行相应的处理，例如根据第一失败原因值重新配置其他候选小区或者根据第一失败原因值调整之前配置过的候选小区的相关的参数(也可以理解为配置条件切换的相关参数)。一种可能的方式中，该第一网络设备在后续配置候选小区时，例如，下一次或者后续的CHO过程中，可以排除该候选目标小区，即不再将该候选目标小区配置成候选小区，这样，终端设备进行下一次或者后续的条件切换时无需再判断该候选目标小区是否满足切换触发条件，降低终端设备的能量消耗和终端设备的实现复杂度。
或者，接入失败的另一种可能是第一网络设备配置的切换触发条件不合理，例如切换触发条件配置的触发切换的要求不合理，(以上述配置了事件A3为例，第一网络设备可能为该事件配置的参数Q偏低)，终端设备根据条件切换配置信息，判断出某候选小区满足切换触发条件，虽然该候选小区满足切换触发条件，但该小区的信号质量并没有达到可以使终端设备成功接入的要求，进而，终端设备无法成功接入该小区。第二网络设备接收到该候选目标小区对应的第一失败原因值后，将接收到的该候选目标小区对应的第一失败原因值发送给第一网络设备。
第一网络设备在接收到第一失败原因值后，可以根据该第一失败原因值进行相应的处理，例如根据第一失败原因值重新配置其他候选小区或者根据第一失败原因值调整之前配置过的候选小区的相关的参数(也可以理解为配置条件切换的相关参数)。一种可能的方式中，例如以上述配置了事件A3为例，第一网络设备在后续配置切换触发条件时，可以提高配置的参数Q的数值。
需要说明的是，配置候选小区的网络设备可以是第一网络设备，也可以是候选小区所属的网络设备。
可选的，本申请实施例中，对于第二失败原因值对应的待定小区，未满足切换触发条件的一种可能是该待定小区的信号质量一直差，第二网络设备接收到该待定小区对应的第二失 败原因值后，将接收到的该待定小区对应的第二失败原因值发送给第一网络设备。
第一网络设备在接收到第二失败原因值后，可以根据该第二失败原因值进行相应的处理，例如根据第二失败原因值重新配置其他候选小区或者根据第二失败原因值调整之前配置过的候选小区的相关的参数(也可以理解为配置条件切换的相关参数)。一种可能的方式中，该第一网络设备在后续配置候选小区时(例如，下一次或者后续的CHO过程中)排除该待定小区，即不再将该待定小区配置成候选小区，因此，终端设备进行下一次或者后续的条件切换时无需再判断该待定小区是否满足切换触发条件，降低了终端设备的能量消耗，和终端设备的实现复杂度。
或者，未满足切换触发条件的另一种可能是该待定小区的信号质量较好，但是第一网络设备配置的切换触发条件不合理(以上述配置了事件A3为例，可能为该事件配置的参数Q偏高，或者，以上述配置了事件A5为例，可能为该事件A5配置的参数K偏高，和/或，配置的参数L偏低)。第二网络设备接收到该待定小区对应的第二失败原因值后，将接收到的该待定小区对应的第二失败原因值发送给第一网络设备。
第一网络设备在接收到第二失败原因值后，可以根据该第二失败原因值进行相应的处理，例如根据第二失败原因值重新配置其他候选小区或者根据第二失败原因值调整之前配置过的候选小区的相关的参数(也可以理解为配置条件切换的相关参数)。一种可能的方式中，第一网络设备接收到该待定小区对应的第二失败原因值后，可以合理调整相关参数，例如以上述配置了事件A3为例，第一网络设备在后续配置切换触发条件时，可以降低配置的参数Q的数值。
可选的，本申请实施例中，第二网络设备接收到上述第一时间信息，和/或，第二时间信息后，将接收到的该上述第一时间信息，和/或，第二时间信息发送给第一网络设备。第一网络设备在接收到第一时间信息，和/或，第二时间信息后，可以根据该第一时间信息，和/或，第二时间信息进行相应的处理，例如根据该第一时间信息，和/或，第二时间信息重新配置其他候选小区或者调整之前配置过的候选小区的相关的参数(也可以理解为配置条件切换的相关参数)。一种可能的方式中，对于某个发生条件切换失败的小区(如候选目标小区或待定小区)，如果在从终端设备接收到条件切换配置信息的时刻到终端设备发送消息2的时刻之间的时间间隔内，网络设备已经重新配置了该发生条件切换失败的小区对应的切换触发条件中的相关参数(如以A3为例，重新配置了参数Q)，则网络设备可以将接收到的来自终端设备的对应该发生条件切换失败的小区的相关信息删除、丢弃或者忽略，不再调整该发生条件切换失败的小区对应的切换触发条件中的相关参数。
可选的，本申请实施例中，第二网络设备接收到上述第三信息或第四信息后，向第一网络设备发送该第三信息或第四信息。第一网络设备在接收到第三信息或第四信息后，可以根据该第三信息或第四信息进行相应的处理，例如根据该第三信息或第四信息重新配置传统切换的相关参数，例如，一种可能的方式中，在终端设备接收到切换消息但在上述第二目标小区接入失败时，可能是该第二目标小区不允许终端设备接入，后续在传统切换流程中，第一网络设备可以不再将该小区配置成目标小区，或者，后续在条件切换流程中，第一网络设备可以不再将该小区配置成候选小区；或者，示例性的，一种可能的方式中，终端设备未接收到切换消息，可能是网络配置的参数不合理，后续在传统切换流程中，第一网络设备可以调整测量配置中的相关事件的参数，例如，以A3事件为例(现有技术中，配置A3事件时，第一网络设备会配置偏移量(如P)，当邻区的信号质量比服务小区的信号质量高P时，UE会触发测量报告的上报)，可能因为配置的参数P太高，导致终端设备无法上报测量报告，因此， 网络设备侧不会触发传统切换准备流程，进而，第一网络设备不会给终端设备发送切换消息，导致终端设备未接收到切换消息。因此，第一网络设备根据切换失败的相关信息，后续可以降低P的数值，进而达到优化的目的。
基于本申请实施例提供的信息传输方法，终端设备向第二网络设备发送条件切换过程中候选目标小区相关的信息，和/或，待定小区相关的信息，例如，终端设备上报的信息可以包括：满足切换触发条件但终端设备接入失败的候选小区(即候选目标小区)对应的第一失败原因值、不满足切换触发条件的候选小区(即待定小区)对应的第二失败原因值、源小区的信息、候选目标小区的信息、候选目标小区中每个小区各自对应的第一时间信息、待定小区的信息、待定小区中每个小区各自对应的第二时间信息，等等，第二网络设备将该终端设备上报的上述信息发送给第一网络设备，使得第一网络设备可以根据候选目标小区相关的信息，和/或，待定小区相关的信息，合理地进行条件切换机制下的切换参数优化。
可以理解的是，以上各个实施例中，由终端设备实现的方法和/或步骤，也可以由可用于终端设备的部件(例如芯片或者电路)实现，由第一网络设备实现的方法和/或步骤，也可以由可用于第一网络设备的部件(例如芯片或者电路)实现，由第二网络设备实现的方法和/或步骤，也可以由可用于第二网络设备的部件(例如芯片或者电路)实现。
上述主要从各个网元之间交互的角度对本申请实施例提供的方案进行了介绍。相应的，本申请实施例还提供了通信装置，该通信装置用于实现上述各种方法。该通信装置可以为上述方法实施例中的终端设备，或者包含上述终端设备的装置，或者为可用于终端设备的部件(例如芯片或者电路)；或者，该通信装置可以为上述方法实施例中的第一网络设备，或者包含上述第一网络设备的装置，或者为可用于第一网络设备的部件(例如芯片或者电路)；或者，该通信装置可以为上述方法实施例中的第二网络设备，或者包含上述第二网络设备的装置，或者为可用于第二网络设备的部件(例如芯片或者电路)。可以理解的是，该通信装置为了实现上述功能，其包含了执行各个功能相应的硬件结构和/或软件模块。本领域技术人员应该很容易意识到，结合本文中所公开的实施例描述的各示例的单元及算法步骤，本申请能够以硬件或硬件和计算机软件的结合形式来实现。某个功能究竟以硬件还是计算机软件驱动硬件的方式来执行，取决于技术方案的特定应用和设计约束条件。专业技术人员可以对每个特定的应用来使用不同方法来实现所描述的功能，但是这种实现不应认为超出本申请的范围。
本申请实施例可以根据上述方法实施例中对通信装置进行功能模块的划分，例如，可以对应各个功能划分各个功能模块，也可以将两个或两个以上的功能集成在一个处理模块中。上述集成的模块既可以采用硬件的形式实现，也可以采用软件功能模块的形式实现。需要说明的是，本申请实施例中对模块的划分是示意性的，仅仅为一种逻辑功能划分，实际实现时可以有另外的划分方式。
比如，以通信装置为上述方法实施例中的终端设备为例。图7示出了一种终端设备70的结构示意图。该终端设备70包括接收模块701和发送模块702。该接收模块701，也可以称为接收单元用以实现接收功能，例如可以是接收电路，接收机，接收器或者通信接口。该发送模块702，也可以称为发送单元用以实现发送功能，例如可以是发送电路，发送机，发送器或者通信接口。
其中，接收模块701，用于接收条件切换配置信息，该条件切换配置信息包括切换触发条件以及M个候选小区的信息，M为正整数；发送模块702，用于发送候选目标小区对应的第一失败原因值，和/或，待定小区对应的第二失败原因值；其中，候选目标小区包括M个侯选小区中满足上述切换触发条件的X个小区，待定小区包括M个侯选小区中不满足上述切 换触发条件的Y个小区，X、Y为自然数，X+Y小于或者等于M。
其中，上述第一失败原因值指示候选目标小区满足切换触发条件，但终端设备在该候选目标小区接入失败；或者，上述第一失败原因值包括第一级失败原因值和第二级失败原因值，该第一级失败原因值指示终端设备发生条件切换失败，该第二级失败原因值指示该候选目标小区满足切换触发条件，但终端设备在该候选目标小区接入失败。上述第二失败原因值指示待定小区不满足切换触发条件；或者，该第二失败原因值包括第三级失败原因值和第四级失败原因值，该第三级失败原因值指示终端设备发生条件切换失败，该第四级失败原因值指示该待定小区不满足所述切换触发条件。
可选的，发送模块702，还用于发送源小区的信息、上述候选目标小区的信息、候选目标小区中每个小区各自对应的第一时间信息、上述待定小区的信息、待定小区中每个小区各自对应的第二时间信息中的一项或多项。其中，上述第一时间信息包括：从终端设备接收到上述条件切换配置信息的时刻到该终端设备触发切换至第一候选目标小区的时刻之间的时间间隔信息、从该终端设备触发切换至该第一候选目标小区的时刻到该终端设备在该第一候选目标小区接入失败的时刻之间的时间间隔信息、以及从该终端设备在该第一候选目标小区接入失败的时刻到该终端设备发送上述第一失败原因值，和/或，上述第二失败原因值的时刻之间的时间间隔信息，该第一候选目标小区为候选目标小区中的任意一个小区。
其中，上述第二时间信息包括：从终端设备接收到上述条件切换配置信息的时刻到该终端设备确定第一待定小区不满足切换触发条件的时刻之间的时间间隔信息、以及从该终端设备确定该第一待定小区不满足该切换触发条件的时刻到该终端设备发送上述第一失败原因值，和/或，上述第二失败原因值的时刻之间的时间间隔信息，该第一待定小区为待定小区中的任意一个小区；或者，该第二时间信息包括：从该终端设备接收到上述条件切换配置信息的时刻到该终端设备停止评估该第一待定小区是否满足该切换触发条件的时刻之间的时间间隔信息、以及从该终端设备停止评估该第一待定小区是否满足该切换触发条件的时刻到该终端设备发送上述第一失败原因值，和/或，上述第二失败原因值的时刻之间的时间间隔信息。
可选的，发送模块702，还用于发送第一目标小区的信息、该第一目标小区对应的第三原因值、第三时间信息中的一项或多项，其中，该第一目标小区为所述M个候选小区中终端设备接入成功的小区。
其中，上述第三原因值指示终端设备执行条件切换成功。上述第三时间信息包括：从终端设备接收到上述条件切换配置信息的时刻到该终端设备触发切换至上述第一目标小区的时刻之间的时间间隔信息、从该终端设备触发切换至该第一目标小区的时刻到该终端设备在该第一目标小区接入成功的时刻之间的时间间隔信息、以及从该终端设备在该第一目标小区接入成功的时刻到该终端设备发送该第一目标小区的信息、该第三原因值、该第三时间信息中的一项或多项的时刻之间的时间间隔信息。
可选的，该终端设备70，还包括处理模块703。其中，该处理模块703，用于在上述第一目标小区接入成功之前，确定接收模块701未接收到无线资源控制RRC重配置消息；
可选的，接收模块701，还用于在处理模块703在所述第一目标小区接入成功之前，接收RRC重配置消息，该RRC重配置消息中包括第二目标小区的信息；处理模块703，还用于确定在该第二目标小区接入失败。
其中，上述方法实施例涉及的各步骤的所有相关内容均可以援引到对应功能模块的功能描述，在此不再赘述。
在本实施例中，该终端设备70以采用集成的方式划分各个功能模块的形式来呈现。这里 的“模块”可以指特定ASIC，电路，执行一个或多个软件或固件程序的处理器和存储器，集成逻辑电路，和/或其他可以提供上述功能的器件。在一个简单的实施例中，本领域的技术人员可以想到该终端设备70可以采用图2或图4所示的终端设备的形式。
比如，图2或图4所示的终端设备中的处理器401可以通过调用存储器402中存储的计算机执行指令，使得终端设备执行上述方法实施例中的信息传输方法。
图7中的接收模块701、发送模块702、以及处理模块703的功能/实现过程可以通过图2或图4所示的终端设备中的处理器401调用存储器402中存储的计算机执行指令来实现。或者，图7中的接收模块701和发送模块702的功能/实现过程可以通过图2或图4所示的终端设备中的收发器403来实现，图7中的处理模块703的功能/实现过程可以通过图2或图4所示的终端设备中的处理器401调用存储器402中存储的计算机执行指令来实现。
由于本实施例提供的终端设备70可执行上述的信息传输方法，因此其所能获得的技术效果可参考上述方法实施例，在此不再赘述。
或者，比如，以通信装置为上述方法实施例中的第一网络设备为例。图8示出了一种第一网络设备的结构示意图。该第一网络设备80包括接收模块801和发送模块802。该接收模块801，也可以称为接收单元用以实现接收功能，例如可以是接收电路，接收机，接收器或者通信接口。该发送模块802，也可以称为发送单元用以实现发送功能，例如可以是发送电路，发送机，发送器或者通信接口。
其中，发送模块802，用于向终端设备发送条件切换配置信息，该条件切换配置信息包括切换触发条件以及M个候选小区的信息，M为正整数；接收模块801，用于接收来自第二网络设备的候选目标小区对应的第一失败原因值，和/或，待定小区对应的第二失败原因值；其中，候选目标小区包括M个侯选小区中满足上述切换触发条件的X个小区，待定小区包括M个侯选小区中不满足上述切换触发条件的Y个小区，X、Y为自然数，X+Y小于或者等于M。
其中，上述第一失败原因值指示候选目标小区满足切换触发条件，但终端设备在该候选目标小区接入失败；或者，上述第一失败原因值包括第一级失败原因值和第二级失败原因值，该第一级失败原因值指示终端设备发生条件切换失败，该第二级失败原因值指示该候选目标小区满足切换触发条件，但终端设备在该候选目标小区接入失败。上述第二失败原因值指示待定小区不满足切换触发条件；或者，该第二失败原因值包括第三级失败原因值和第四级失败原因值，该第三级失败原因值指示终端设备发生条件切换失败，该第四级失败原因值指示该待定小区不满足所述切换触发条件。
可选的，接收模块801，还用于接收来自第二网络设备的源小区的信息、上述候选目标小区的信息、候选目标小区中每个小区各自对应的第一时间信息、上述待定小区的信息、待定小区中每个小区各自对应的第二时间信息中的一项或多项。
其中，上述第一时间信息包括：从终端设备接收到上述条件切换配置信息的时刻到该终端设备触发切换至第一候选目标小区的时刻之间的时间间隔信息、从该终端设备触发切换至该第一候选目标小区的时刻到该终端设备在该第一候选目标小区接入失败的时刻之间的时间间隔信息、以及从该终端设备在该第一候选目标小区接入失败的时刻到该终端设备发送上述第一失败原因值，和/或，上述第二失败原因值的时刻之间的时间间隔信息，该第一候选目标小区为候选目标小区中的任意一个小区。
其中，上述第二时间信息包括：从终端设备接收到上述条件切换配置信息的时刻到该终端设备确定第一待定小区不满足切换触发条件的时刻之间的时间间隔信息、以及从该终端设 备确定该第一待定小区不满足该切换触发条件的时刻到该终端设备发送上述第一失败原因值，和/或，上述第二失败原因值的时刻之间的时间间隔信息，该第一待定小区为待定小区中的任意一个小区；或者，该第二时间信息包括：从该终端设备接收到上述条件切换配置信息的时刻到该终端设备停止评估该第一待定小区是否满足该切换触发条件的时刻之间的时间间隔信息、以及从该终端设备停止评估该第一待定小区是否满足该切换触发条件的时刻到该终端设备发送上述第一失败原因值，和/或，上述第二失败原因值的时刻之间的时间间隔信息。
可选的，接收模块801，还用于接收来自第二网络设备的第一目标小区的信息、该第一目标小区对应的第三原因值、第三时间信息中的一项或多项，其中，该第一目标小区为所述M个候选小区中终端设备接入成功的小区。
其中，上述第三原因值指示终端设备执行条件切换成功。上述第三时间信息包括：从终端设备接收到上述条件切换配置信息的时刻到该终端设备触发切换至上述第一目标小区的时刻之间的时间间隔信息、从该终端设备触发切换至该第一目标小区的时刻到该终端设备在该第一目标小区接入成功的时刻之间的时间间隔信息、以及从该终端设备在该第一目标小区接入成功的时刻到该终端设备发送该第一目标小区的信息、该第三原因值、该第三时间信息中的一项或多项的时刻之间的时间间隔信息。
其中，上述方法实施例涉及的各步骤的所有相关内容均可以援引到对应功能模块的功能描述，在此不再赘述。
在本实施例中，该第一网络设备80以采用集成的方式划分各个功能模块的形式来呈现。这里的“模块”可以指特定ASIC，电路，执行一个或多个软件或固件程序的处理器和存储器，集成逻辑电路，和/或其他可以提供上述功能的器件。在一个简单的实施例中，本领域的技术人员可以想到该第一网络设备80可以采用图2所示的第一网络设备的形式。
比如，图2所示的第一网络设备中的处理器301a可以通过调用存储器302a中存储的计算机执行指令，使得第一网络设备执行上述方法实施例中的信息传输方法。
具体的，图8中的接收模块801和发送模块802的功能/实现过程可以通过图2所示的第一网络设备中的收发器303a来实现。
由于本实施例提供的第一网络设备80可执行上述的信息传输方法，因此其所能获得的技术效果可参考上述方法实施例，在此不再赘述。
或者，比如，以通信装置为上述方法实施例中的第二网络设备为例。图9示出了一种第二网络设备的结构示意图。该第二网络设备90包括接收模块901和发送模块902。该接收模块901，也可以称为接收单元用以实现接收功能，例如可以是接收电路，接收机，接收器或者通信接口。该发送模块902，也可以称为发送单元用以实现发送功能，例如可以是发送电路，发送机，发送器或者通信接口。
其中，接收模块901，用于接收来自终端设备的候选目标小区对应的第一失败原因值，和/或，待定小区对应的第二失败原因值；其中，候选目标小区包括M个侯选小区中满足上述切换触发条件的X个小区，待定小区包括M个侯选小区中不满足上述切换触发条件的Y个小区，X、Y为自然数，X+Y小于或者等于M，该M个候选小区和所述切换触发条件是通过条件切换配置信息配置的。
其中，上述第一失败原因值指示候选目标小区满足切换触发条件，但终端设备在该候选目标小区接入失败；或者，上述第一失败原因值包括第一级失败原因值和第二级失败原因值，该第一级失败原因值指示终端设备发生条件切换失败，该第二级失败原因值指示该候选目标小区满足切换触发条件，但终端设备在该候选目标小区接入失败。上述第二失败原因值指示 待定小区不满足切换触发条件；或者，该第二失败原因值包括第三级失败原因值和第四级失败原因值，该第三级失败原因值指示终端设备发生条件切换失败，该第四级失败原因值指示该待定小区不满足所述切换触发条件。
可选的，接收模块901，还用于接收来自终端设备的源小区的信息、上述候选目标小区的信息、候选目标小区中每个小区各自对应的第一时间信息、上述待定小区的信息、待定小区中每个小区各自对应的第二时间信息中的一项或多项。
其中，上述第一时间信息包括：从终端设备接收到上述条件切换配置信息的时刻到该终端设备触发切换至第一候选目标小区的时刻之间的时间间隔信息、从该终端设备触发切换至该第一候选目标小区的时刻到该终端设备在该第一候选目标小区接入失败的时刻之间的时间间隔信息、以及从该终端设备在该第一候选目标小区接入失败的时刻到该终端设备发送上述第一失败原因值，和/或，上述第二失败原因值的时刻之间的时间间隔信息，该第一候选目标小区为候选目标小区中的任意一个小区。
其中，上述第二时间信息包括：从终端设备接收到上述条件切换配置信息的时刻到该终端设备确定第一待定小区不满足切换触发条件的时刻之间的时间间隔信息、以及从该终端设备确定该第一待定小区不满足该切换触发条件的时刻到该终端设备发送上述第一失败原因值，和/或，上述第二失败原因值的时刻之间的时间间隔信息，该第一待定小区为待定小区中的任意一个小区；或者，该第二时间信息包括：从该终端设备接收到上述条件切换配置信息的时刻到该终端设备停止评估该第一待定小区是否满足该切换触发条件的时刻之间的时间间隔信息、以及从该终端设备停止评估该第一待定小区是否满足该切换触发条件的时刻到该终端设备发送上述第一失败原因值，和/或，上述第二失败原因值的时刻之间的时间间隔信息。
可选的，接收模块901，还用于接收来自终端设备的第一目标小区的信息、该第一目标小区对应的第三原因值、第三时间信息中的一项或多项，其中，该第一目标小区为所述M个候选小区中终端设备接入成功的小区。
其中，上述第三原因值指示终端设备执行条件切换成功。上述第三时间信息包括：从终端设备接收到上述条件切换配置信息的时刻到该终端设备触发切换至上述第一目标小区的时刻之间的时间间隔信息、从该终端设备触发切换至该第一目标小区的时刻到该终端设备在该第一目标小区接入成功的时刻之间的时间间隔信息、以及从该终端设备在该第一目标小区接入成功的时刻到该终端设备发送该第一目标小区的信息、该第三原因值、该第三时间信息中的一项或多项的时刻之间的时间间隔信息。
其中，发送模块902，用于向第一网络设备发送候选目标小区对应的第一失败原因值，和/或，待定小区对应的第二失败原因值；其中，候选目标小区包括M个侯选小区中满足上述切换触发条件的X个小区，待定小区包括M个侯选小区中不满足上述切换触发条件的Y个小区，X、Y为自然数，X+Y小于或者等于M，该M个候选小区和所述切换触发条件是通过条件切换配置信息配置的。
可选的，发送模块902，还用于向第一网络设备发送源小区的信息、上述候选目标小区的信息、候选目标小区中每个小区各自对应的第一时间信息、上述待定小区的信息、待定小区中每个小区各自对应的第二时间信息中的一项或多项。
可选的，发送模块902，还用于向第一网络设备发送第一目标小区的信息、该第一目标小区对应的第三原因值、第三时间信息中的一项或多项，其中，该第一目标小区为所述M个候选小区中终端设备接入成功的小区。
其中，上述方法实施例涉及的各步骤的所有相关内容均可以援引到对应功能模块的功能 描述，在此不再赘述。
在本实施例中，该第二网络设备90以采用集成的方式划分各个功能模块的形式来呈现。这里的“模块”可以指特定ASIC，电路，执行一个或多个软件或固件程序的处理器和存储器，集成逻辑电路，和/或其他可以提供上述功能的器件。在一个简单的实施例中，本领域的技术人员可以想到该第二网络设备90可以采用图2所示的第二网络设备的形式。
比如，图2所示的第二网络设备中的处理器301b可以通过调用存储器302b中存储的计算机执行指令，使得第二网络设备执行上述方法实施例中的信息传输方法。
具体的，图9中的接收模块901和发送模块902的功能/实现过程可以通过图2所示的第二网络设备中的收发器303b来实现。
由于本实施例提供的第二网络设备90可执行上述的信息传输方法，因此其所能获得的技术效果可参考上述方法实施例，在此不再赘述。
可选的，本申请实施例还提供了一种通信装置(例如，该通信装置可以是芯片或芯片系统)，该通信装置包括处理器，用于实现上述任一方法实施例中的方法。在一种可能的设计中，该通信装置还包括存储器。该存储器，用于保存必要的程序指令和数据，处理器可以调用存储器中存储的程序代码以指令该通信装置执行上述任一方法实施例中的方法。当然，存储器也可以不在该通信装置中。该通信装置是芯片系统时，可以由芯片构成，也可以包含芯片和其他分立器件，本申请实施例对此不作具体限定。
在上述实施例中，可以全部或部分地通过软件、硬件、固件或者其任意组合来实现。当使用软件程序实现时，可以全部或部分地以计算机程序产品的形式来实现。该计算机程序产品包括一个或多个计算机指令。在计算机上加载和执行计算机程序指令时，全部或部分地产生按照本申请实施例所述的流程或功能。所述计算机可以是通用计算机、专用计算机、计算机网络、或者其他可编程装置。所述计算机指令可以存储在计算机可读存储介质中，或者从一个计算机可读存储介质向另一个计算机可读存储介质传输，例如，所述计算机指令可以从一个网站站点、计算机、服务器或者数据中心通过有线(例如同轴电缆、光纤、数字用户线(digital subscriber line，DSL))或无线(例如红外、无线、微波等)方式向另一个网站站点、计算机、服务器或数据中心进行传输。所述计算机可读存储介质可以是计算机能够存取的任何可用介质或者是包含一个或多个可以用介质集成的服务器、数据中心等数据存储设备。所述可用介质可以是磁性介质(例如，软盘、硬盘、磁带)，光介质(例如，DVD)、或者半导体介质(例如固态硬盘(solid state disk，SSD))等。本申请实施例中,计算机可以包括前面所述的装置。
尽管在此结合各实施例对本申请进行了描述，然而，在实施所要求保护的本申请过程中，本领域技术人员通过查看所述附图、公开内容、以及所附权利要求书，可理解并实现所述公开实施例的其他变化。在权利要求中，“包括”(comprising)一词不排除其他组成部分或步骤，“一”或“一个”不排除多个的情况。单个处理器或其他单元可以实现权利要求中列举的若干项功能。相互不同的从属权利要求中记载了某些措施，但这并不表示这些措施不能组合起来产生良好的效果。
尽管结合具体特征及其实施例对本申请进行了描述，显而易见的，在不脱离本申请的精神和范围的情况下，可对其进行各种修改和组合。相应地，本说明书和附图仅仅是所附权利要求所界定的本申请的示例性说明，且视为已覆盖本申请范围内的任意和所有修改、变化、组合或等同物。显然，本领域的技术人员可以对本申请进行各种改动和变型而不脱离本申请的精神和范围。这样，倘若本申请的这些修改和变型属于本申请权利要求及其等同技术的范 围之内，则本申请也意图包含这些改动和变型在内。

Claims (31)

  1. 一种信息传输方法，其特征在于，所述方法包括：
    接收条件切换配置信息，所述条件切换配置信息包括切换触发条件以及M个候选小区的信息，M为正整数；
    发送候选目标小区对应的第一失败原因值，和/或，待定小区对应的第二失败原因值；
    其中，所述候选目标小区包括所述M个侯选小区中满足所述切换触发条件且终端设备接入失败的X个小区，所述待定小区包括所述M个侯选小区中不满足所述切换触发条件的Y个小区，X、Y为自然数，X+Y小于或者等于M。
  2. 根据权利要求1所述的方法，其特征在于，所述第一失败原因值指示所述候选目标小区满足所述切换触发条件，但所述终端设备在所述候选目标小区接入失败；或者，
    所述第一失败原因值包括第一级失败原因值和第二级失败原因值，所述第一级失败原因值指示所述终端设备发生条件切换失败，所述第二级失败原因值指示所述候选目标小区满足所述切换触发条件，但所述终端设备在所述候选目标小区接入失败。
  3. 根据权利要求1或2所述的方法，其特征在于，所述第二失败原因值指示所述待定小区不满足所述切换触发条件；或者，
    所述第二失败原因值包括第三级失败原因值和第四级失败原因值，所述第三级失败原因值指示所述终端设备发生条件切换失败，所述第四级失败原因值指示所述待定小区不满足所述切换触发条件。
  4. 根据权利要求1-3任一项所述的方法，其特征在于，所述方法还包括：
    发送以下信息中的一项或多项：
    源小区的信息、所述候选目标小区的信息、所述候选目标小区中每个小区各自对应的第一时间信息、所述待定小区的信息、所述待定小区中每个小区各自对应的第二时间信息。
  5. 根据权利要求4所述的方法，其特征在于，所述第一时间信息包括：
    从所述终端设备接收到所述条件切换配置信息的时刻到所述终端设备触发切换至第一候选目标小区的时刻之间的时间间隔信息、从所述终端设备触发切换至所述第一候选目标小区的时刻到所述终端设备在所述第一候选目标小区接入失败的时刻之间的时间间隔信息、以及从所述终端设备在所述第一候选目标小区接入失败的时刻到所述终端设备发送所述第一失败原因值，和/或，所述第二失败原因值的时刻之间的时间间隔信息，所述第一候选目标小区为所述候选目标小区中的任意一个小区。
  6. 根据权利要求4或5所述的方法，其特征在于，所述第二时间信息包括：
    从所述终端设备接收到所述条件切换配置信息的时刻到所述终端设备确定第一待定小区不满足所述切换触发条件的时刻之间的时间间隔信息、以及从所述终端设备确定所述第一待定小区不满足所述切换触发条件的时刻到所述终端设备发送所述第一失败原因值，和/或，所述第二失败原因值的时刻之间的时间间隔信息，所述第一待定小区为所述待定小区中的任意一个小区；或者，
    所述第二时间信息包括：从所述终端设备接收到所述条件切换配置信息的时刻到所述终端设备停止评估所述第一待定小区是否满足所述切换触发条件的时刻之间的时间间隔信息、以及从所述终端设备停止评估所述第一待定小区是否满足所述切换触发条件的时刻到所述终端设备发送所述第一失败原因值，和/或，所述第二失败原因值的时刻之间的时间间隔信息。
  7. 根据权利要求1-6任一项所述的方法，其特征在于，所述方法还包括：
    发送以下信息中的一项或多项：
    第一目标小区的信息、所述第一目标小区对应的第三原因值、第三时间信息，其中，所述第一目标小区为所述M个候选小区中所述终端设备接入成功的小区。
  8. 根据权利要求7所述的方法，其特征在于，在所述终端设备在所述第一目标小区接入成功之前，所述方法还包括：
    确定未接收到无线资源控制RRC重配置消息，所述RRC重配置消息用于指示所述终端设备执行传统切换；或者，
    接收到所述RRC重配置消息，但确定在第二目标小区接入失败，所述RRC重配置消息中包括所述第二目标小区的信息。
  9. 一种信息传输方法，其特征在于，所述方法包括：
    向终端设备发送条件切换配置信息，所述条件切换配置信息包括切换触发条件以及M个候选小区的信息，M为正整数；
    接收来自第二网络设备的候选目标小区对应的第一失败原因值，和/或，待定小区对应的第二失败原因值，其中，所述候选目标小区包括所述M个侯选小区中满足所述切换触发条件且终端设备接入失败的X个小区，所述待定小区包括所述M个侯选小区中不满足所述切换触发条件的Y个小区，X、Y为自然数，X+Y小于或者等于M。
  10. 根据权利要求9所述的方法，其特征在于，所述第一失败原因值指示所述候选目标小区满足所述切换触发条件，但所述终端设备在所述候选目标小区接入失败；或者，
    所述第一失败原因值包括第一级失败原因值和第二级失败原因值，所述第一级失败原因值指示所述终端设备发生条件切换失败，所述第二级失败原因值指示所述候选目标小区满足所述切换触发条件，但所述终端设备在所述候选目标小区接入失败。
  11. 根据权利要求9或10所述的方法，其特征在于，所述第二失败原因值指示所述待定小区不满足所述切换触发条件；或者，
    所述第二失败原因值包括第三级失败原因值和第四级失败原因值，所述第三级失败原因值指示所述终端设备发生条件切换失败，所述第四级失败原因值指示所述待定小区不满足所述切换触发条件。
  12. 根据权利要求9-11任一项所述的方法，其特征在于，所述方法还包括：
    接收来自所述第二网络设备的以下信息中的一项或多项：
    源小区的信息、所述候选目标小区的信息、所述候选目标小区中每个小区各自对应的第一时间信息、所述待定小区的信息、所述待定小区中每个小区各自对应的第二时间信息。
  13. 根据权利要求12所述的方法，其特征在于，所述第一时间信息包括：
    从所述终端设备接收到所述条件切换配置信息的时刻到所述终端设备触发切换至第一候选目标小区的时刻之间的时间间隔信息、从所述终端设备触发切换至所述第一候选目标小区的时刻到所述终端设备在所述第一候选目标小区接入失败的时刻之间的时间间隔信息、以及从所述终端设备在所述第一候选目标小区接入失败的时刻到所述终端设备发送所述第一失败原因值，和/或，所述第二失败原因值的时刻之间的时间间隔信息，所述第一候选目标小区为所述候选目标小区中的任意一个小区。
  14. 根据权利要求12或13所述的方法，其特征在于，所述第二时间信息包括：
    从所述终端设备接收到所述条件切换配置信息的时刻到所述终端设备确定第一待定小区不满足所述切换触发条件的时刻之间的时间间隔信息、以及从所述终端设备确定所述第一待定小区不满足所述切换触发条件的时刻到所述终端设备发送所述第一失败原因值，和/或，所述第二失败原因值的时刻之间的时间间隔信息，所述第一待定小区为所述待定小区中的任意 一个小区；或者，
    所述第二时间信息包括：从所述终端设备接收到所述条件切换配置信息的时刻到所述终端设备停止评估所述第一待定小区是否满足所述切换触发条件的时刻之间的时间间隔信息、以及从所述终端设备停止评估所述第一待定小区是否满足所述切换触发条件的时刻到所述终端设备发送所述第一失败原因值，和/或，所述第二失败原因值的时刻之间的时间间隔信息。
  15. 根据权利要求9-14任一项所述的方法，其特征在于，所述方法还包括：
    接收来自所述第二网络设备的以下信息中的一项或多项：
    第一目标小区的信息、所述第一目标小区对应的第三原因值、第三时间信息，其中，所述第一目标小区为所述M个候选小区中所述终端设备接入成功的小区。
  16. 一种信息传输方法，其特征在于，所述方法包括：
    接收来自终端设备的候选目标小区对应的第一失败原因值，和/或，待定小区对应的第二失败原因值，其中，所述候选目标小区包括M个侯选小区中满足切换触发条件且终端设备接入失败的X个小区，所述待定小区包括所述M个侯选小区中不满足所述切换触发条件的Y个小区，X、Y为自然数，X+Y小于或者等于M，所述M个候选小区和所述切换触发条件是通过条件切换配置信息配置的；
    向第一网络设备发送所述第一失败原因值，和/或，所述第二失败原因值。
  17. 根据权利要求16所述的方法，其特征在于，所述第一失败原因值指示所述候选目标小区满足所述切换触发条件，但所述终端设备在所述候选目标小区接入失败；或者，
    所述第一失败原因值包括第一级失败原因值和第二级失败原因值，所述第一级失败原因值指示所述终端设备发生条件切换失败，所述第二级失败原因值指示所述候选目标小区满足所述切换触发条件，但所述终端设备在所述候选目标小区接入失败。
  18. 根据权利要求16或17所述的方法，其特征在于，所述第二失败原因值指示所述待定小区不满足所述切换触发条件；或者，
    所述第二失败原因值包括第三级失败原因值和第四级失败原因值，所述第三级失败原因值指示所述终端设备发生条件切换失败，所述第四级失败原因值指示所述待定小区不满足所述切换触发条件。
  19. 根据权利要求16-18任一项所述的方法，其特征在于，所述方法还包括：
    接收来自所述终端设备的以下信息中的一项或多项，并向所述第一网络设备发送所述以下信息中的一项或多项：
    源小区的信息、所述候选目标小区的信息、所述候选目标小区中每个小区各自对应的第一时间信息、所述待定小区的信息、所述待定小区中每个小区各自对应的第二时间信息。
  20. 根据权利要求19所述的方法，其特征在于，所述第一时间信息包括：
    从所述终端设备接收到所述条件切换配置信息的时刻到所述终端设备触发切换至第一候选目标小区的时刻之间的时间间隔信息、从所述终端设备触发切换至所述第一候选目标小区的时刻到所述终端设备在所述第一候选目标小区接入失败的时刻之间的时间间隔信息、以及从所述终端设备在所述第一候选目标小区接入失败的时刻到所述终端设备发送所述第一失败原因值，和/或，所述第二失败原因值的时刻之间的时间间隔信息，所述第一候选目标小区为所述候选目标小区中的任意一个小区。
  21. 根据权利要求19或20所述的方法，其特征在于，所述第二时间信息包括：
    从所述终端设备接收到所述条件切换配置信息的时刻到所述终端设备确定第一待定小区不满足所述切换触发条件的时刻之间的时间间隔信息、以及从所述终端设备确定所述第一待 定小区不满足所述切换触发条件的时刻到所述终端设备发送所述第一失败原因值，和/或，所述第二失败原因值的时刻之间的时间间隔信息，所述第一待定小区为所述待定小区中的任意一个小区；或者，
    所述第二时间信息包括：从所述终端设备接收到所述条件切换配置信息的时刻到所述终端设备停止评估所述第一待定小区是否满足所述切换触发条件的时刻之间的时间间隔信息、以及从所述终端设备停止评估所述第一待定小区是否满足所述切换触发条件的时刻到所述终端设备发送所述第一失败原因值，和/或，所述第二失败原因值的时刻之间的时间间隔信息。
  22. 根据权利要求16-21任一项所述的方法，其特征在于，所述方法还包括：
    接收来自所述终端设备的以下信息中的一项或多项，并向所述第一网络设备发送所述以下信息中的一项或多项：
    第一目标小区的信息、所述第一目标小区对应的第三原因值、第三时间信息，其中，所述第一目标小区为所述M个候选小区中所述终端设备接入成功的小区。
  23. 根据权利要求7、15、或22任一项所述的方法，其特征在于，所述第三原因值指示所述终端设备执行条件切换成功。
  24. 根据权利要求7、15、22、或23任一项所述的方法，其特征在于，所述第三时间信息包括：
    从所述终端设备接收到所述条件切换配置信息的时刻到所述终端设备触发切换至所述第一目标小区的时刻之间的时间间隔信息、从所述终端设备触发切换至所述第一目标小区的时刻到所述终端设备在所述第一目标小区接入成功的时刻之间的时间间隔信息、以及从所述终端设备在所述第一目标小区接入成功的时刻到所述终端设备发送所述第一目标小区的信息、所述第三原因值、所述第三时间信息中的一项或多项的时刻之间的时间间隔信息。
  25. 一种通信装置，其特征在于，所述通信装置包括：接收模块和发送模块；
    所述接收模块，用于接收条件切换配置信息，所述条件切换配置信息包括切换触发条件以及M个候选小区的信息，M为正整数；
    所述发送模块，用于发送候选目标小区对应的第一失败原因值，和/或，待定小区对应的第二失败原因值；
    其中，所述候选目标小区包括所述M个侯选小区中满足所述切换触发条件且终端设备接入失败的X个小区，所述待定小区包括所述M个侯选小区中不满足所述切换触发条件的Y个小区，X、Y为自然数，X+Y小于或者等于M。
  26. 一种通信装置，其特征在于，所述通信装置包括：接收模块和发送模块；
    所述发送模块，用于向终端设备发送条件切换配置信息，所述条件切换配置信息包括切换触发条件以及M个候选小区的信息，M为正整数；
    所述接收模块，用于接收来自第二网络设备的候选目标小区对应的第一失败原因值，和/或，待定小区对应的第二失败原因值，其中，所述候选目标小区包括所述M个侯选小区中满足所述切换触发条件且终端设备接入失败的X个小区，所述待定小区包括所述M个侯选小区中不满足所述切换触发条件的Y个小区，X、Y为自然数，X+Y小于或者等于M。
  27. 一种通信装置，其特征在于，所述通信装置包括：接收模块和发送模块；
    所述接收模块，用于接收来自终端设备的候选目标小区对应的第一失败原因值，和/或，待定小区对应的第二失败原因值，其中，所述候选目标小区包括M个侯选小区中满足切换触发条件且终端设备接入失败的X个小区，所述待定小区包括所述M个侯选小区中不满足所述切换触发条件的Y个小区，X、Y为自然数，X+Y小于或者等于M，所述M个候选小区和 所述切换触发条件是通过条件切换配置信息配置的；
    所述发送模块，用于向第一网络设备发送所述第一失败原因值，和/或，所述第二失败原因值。
  28. 一种通信方法，其特征在于，所述方法包括：
    接收条件切换配置信息，所述条件切换配置信息包括切换触发条件以及M个候选小区的信息，M为正整数；
    当从所述M个候选小区中确定出满足所述切换触发条件的小区且尝试接入所述满足所述切换触发条件的小区时，停止判断所述M个候选小区中是否存在满足所述切换触发条件的小区。
  29. 一种通信装置，其特征在于，所述通信装置包括：接收模块和处理模块；
    所述接收模块，用于接收条件切换配置信息，所述条件切换配置信息包括切换触发条件以及M个候选小区的信息，M为正整数；
    所述处理模块，用于当从所述M个候选小区中确定出满足所述切换触发条件的小区且尝试接入所述满足所述切换触发条件的小区时，停止判断所述M个候选小区中是否存在满足所述切换触发条件的小区。
  30. 一种通信系统，其特征在于，所述通信系统包括以下一项或多项：权利要求25所述的通信装置、权利要求26所述的通信装置、权利要求27所述的通信装置、或者权利要求29所述的通信装置。
  31. 一种计算机可读存储介质，其特征在于，包括指令，当其在计算机上运行时，使得所述计算机执行如权利要求1至8、23、24中任意一项所述的方法，或者，使得所述计算机执行如权利要求9至15、23、24中任意一项所述的方法，或者，使得所述计算机执行如权利要求16至24中任意一项所述的方法，或者，使得所述计算机执行如权利要求28所述的方法。
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