WO2021003715A1 - 一种条件切换的方法和装置 - Google Patents

一种条件切换的方法和装置 Download PDF

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Publication number
WO2021003715A1
WO2021003715A1 PCT/CN2019/095479 CN2019095479W WO2021003715A1 WO 2021003715 A1 WO2021003715 A1 WO 2021003715A1 CN 2019095479 W CN2019095479 W CN 2019095479W WO 2021003715 A1 WO2021003715 A1 WO 2021003715A1
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WIPO (PCT)
Prior art keywords
cho
measurement configuration
measurement
identifier
source cell
Prior art date
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PCT/CN2019/095479
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English (en)
French (fr)
Inventor
卢前溪
尤心
Original Assignee
Oppo广东移动通信有限公司
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.)
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Publication date
Application filed by Oppo广东移动通信有限公司 filed Critical Oppo广东移动通信有限公司
Priority to JP2021573967A priority Critical patent/JP7319396B2/ja
Priority to CN201980057948.1A priority patent/CN112868251A/zh
Priority to PCT/CN2019/095479 priority patent/WO2021003715A1/zh
Priority to KR1020217040757A priority patent/KR20220030936A/ko
Priority to EP19936911.7A priority patent/EP3930380B1/en
Priority to BR112021026475A priority patent/BR112021026475A2/pt
Priority to CN202110523076.2A priority patent/CN113329420B/zh
Publication of WO2021003715A1 publication Critical patent/WO2021003715A1/zh
Priority to US17/481,083 priority patent/US20220007244A1/en

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    • 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
    • H04W36/0085—Hand-off measurements
    • H04W36/0094—Definition of hand-off measurement parameters
    • 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
    • H04W36/0085—Hand-off measurements
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W24/00—Supervisory, monitoring or testing arrangements
    • H04W24/02—Arrangements for optimising operational condition
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/08—Reselecting an access point
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/24—Reselection being triggered by specific parameters
    • H04W36/30—Reselection being triggered by specific parameters by measured or perceived connection quality data
    • H04W36/302—Reselection being triggered by specific parameters by measured or perceived connection quality data due to low signal strength
    • 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

Definitions

  • This application relates to the field of communications, in particular to a method and device for conditional switching
  • the communication system needs to transfer the communication link between the terminal equipment and the original cell to On the new cell, the cell handover is executed.
  • conditional handover CHO
  • the terminal device Before performing CHO, the terminal device needs to measure the source cell and the target cell, and then determines whether to switch from the source cell to the target cell based on the measurement result and the conditions pre-configured by the network device. How to configure the terminal equipment that executes CHO for cell measurement is a problem that needs to be solved at present.
  • This application provides a method and device for conditional switching, which can reduce the number of measurement parameters maintained by terminal equipment and reduce the complexity of CHO.
  • a method for conditional handover including: receiving CHO configuration information, where the CHO configuration information includes measurement configuration information of a source cell; and performing CHO processing according to the CHO configuration information.
  • another method for conditional handover including: sending CHO configuration information, where the CHO configuration information includes measurement configuration information of the source cell.
  • a CHO device for implementing the method of the first aspect.
  • the device includes a functional module for executing the method in the first aspect.
  • another CHO device for executing the method of the second aspect.
  • the device includes a functional module for executing the method in the second aspect.
  • a CHO device including a processor and a memory.
  • the memory is used to store a computer program, and the processor is used to call and run the computer program stored in the memory to execute the method in the above first aspect.
  • another CHO device including a processor and a memory.
  • the memory is used to store a computer program
  • the processor is used to call and run the computer program stored in the memory to execute the method in the above second aspect.
  • a chip for executing the method in the first aspect.
  • the chip includes: a processor, configured to call and run a computer program from the memory, so that the device installed with the chip is used to execute the method in the first aspect.
  • a chip for executing the method in the second aspect.
  • the chip includes a processor, which is used to call and run a computer program from the memory, so that the device installed with the chip is used to execute the method in the above second aspect.
  • a computer-readable storage medium for storing a computer program that enables a computer to execute the method in the above-mentioned first aspect.
  • a computer-readable storage medium for storing a computer program that enables a computer to execute the method in the second aspect.
  • a computer program product including computer program instructions that cause a computer to execute the method in the first aspect.
  • a computer program product including computer program instructions that cause a computer to execute the method in the second aspect.
  • a computer program which when running on a computer, causes the computer to execute the method in the first aspect.
  • a computer program which, when run on a computer, causes the computer to execute the method in the second aspect.
  • the terminal device since the CHO configuration information received by the terminal device includes the measurement configuration information of the source cell, the terminal device can use the measurement configuration information of the source cell to perform CHO-related measurements, reducing the maintenance of the terminal device.
  • the number of measurement parameters reduces the complexity of CHO.
  • Figure 1 is a schematic diagram of a communication system suitable for the present application
  • FIG. 2 is a schematic diagram of a CHO process provided by this application.
  • FIG. 3 is a schematic diagram of the structure of an RRC message provided by this application.
  • Figure 4 is a schematic diagram of a CHO method provided by this application.
  • FIG. 5 is a schematic diagram of another CHO method provided by this application.
  • Fig. 6 is a schematic diagram of a CHO device provided by the present application.
  • Figure 7 is a schematic diagram of another CHO device provided by the present application.
  • Fig. 8 is a schematic diagram of a CHO device provided by the present application.
  • FIG. 1 is a schematic diagram of a communication system suitable for this application.
  • the communication system 100 includes a network device 110, a network device 120, and a terminal device 130.
  • the terminal device 130 communicates with the network device 110 and/or the network device 120 through electromagnetic waves.
  • the terminal device 130 may include various handheld devices with wireless communication functions, vehicle-mounted devices, wearable devices, computing devices, or other processing devices connected to a wireless modem, for example, the third generation cooperation project (3 rd generation Partnership project, user equipment (UE), mobile station (mobile station, MS), soft terminal, home gateway, set-top box, etc. defined by 3GPP).
  • 3GPP third generation cooperation project
  • Network device 110 may be defined by the 3GPP base stations, e.g., the fifth generation (5 th generation, 5G) communication system, a base station (gNB).
  • the network device 110 may also be a non-3GPP (non-3GPP) access network device, such as an access gateway (AGF).
  • AMF access gateway
  • the network device 110 may also be a relay station, an access point, a vehicle-mounted device, a wearable device, and other types of devices.
  • the network device 120 may be a base station defined by 3GPP, for example, a base station (gNB) in a 5G communication system.
  • the network device 120 may also be a non-3GPP (non-3GPP) access network device, such as AGF.
  • the network device 120 may also be a relay station, an access point, a vehicle-mounted device, a wearable device, and other types of devices.
  • the communication system 100 is only an example, and the communication system applicable to the present application is not limited to this.
  • the number of network devices and terminal devices included in the communication system 100 may also be other numbers.
  • the terminal devices and network devices are no longer accompanied by reference numerals.
  • FIG. 2 shows a schematic diagram of a CHO process provided by this application.
  • the process includes:
  • the network device sends measurement configuration information to the terminal device, and the configuration information indicates which measurement operations the terminal device needs to perform and how to report.
  • S230 The network device sends a switching condition to the terminal device.
  • the switching condition is for example that the measured value enters the threshold and lasts for a period of time. If the terminal device determines that the current measurement value meets the switching conditions, the following switching steps are performed.
  • the target cell separately requests access and mobility management function (AFM) and the target cell to perform path switching with the user plane function (UPF) to release the UE context of the source base station to facilitate communication with
  • the terminal device completes synchronization.
  • the network device can send CHO configuration information to the terminal device through a radio resource control (RRC) reconfiguration message for the terminal device to perform CHO-related processing, for example, for the terminal device to perform CHO measurement.
  • RRC radio resource control
  • the RRC reconfiguration message further includes a field that carries measurement configuration information of the source cell, and the measurement configuration information of the source cell carried in this field is used for the terminal device to perform mobility measurement in the connected state, for example, radio resource management ( radio resource management (RRM) measurement.
  • RRM radio resource management
  • the RRC reconfiguration message includes a first field and a second field, where the first field is used to carry measurement configuration information of the source cell, and the second field is used to carry CHO measurement configuration information.
  • the terminal device After receiving the RRC reconfiguration message, the terminal device performs RRM measurement and CHO measurement according to the message.
  • first and second are only used to indicate different individuals.
  • first field and the second field indicate two different fields.
  • the method 400 includes:
  • S410 Receive CHO configuration information, where the CHO configuration information includes measurement configuration information of the source cell.
  • the method 400 may be executed by a terminal device or a chip in the terminal device.
  • the CHO configuration information is, for example, carried in the second field of the RRC reconfiguration message.
  • the measurement configuration information of the source cell contained in the CHO configuration information is used by the terminal to perform CHO-related processing, for example, performing intra-frequency or inter-frequency measurement to To determine whether to switch from the source cell to the target cell.
  • the measurement configuration information of the source cell contained in the CHO configuration information may be a measurement configuration identifier, for example, the measurement configuration identifier of the source cell (measurement object ID, MeasObjectId), report configuration identifier (measurement report config ID, reportConfigId) And at least one of a measurement ID (MeasId).
  • the measurement object identifier is used to indicate the measurement object.
  • the measurement object is a frequency point, such as an evolved universal radio access (evolved universal terrestrial radio access, E-UTRA) carrier frequency.
  • E-UTRA evolved universal terrestrial radio access
  • the network device can configure the cell offset list and the blacklisted cell list, and the terminal device does not perform any operations on the blacklisted cells in the measurement evaluation and measurement report.
  • the report configuration identifier is used to indicate the report configuration.
  • the reporting configuration can be divided into event-triggered reporting configuration, periodic-triggered reporting configuration, and event-triggered periodic reporting configuration. The following will introduce the specific content of these three configurations. Among them, the measurement events included in the event-triggered reporting configuration are, for example:
  • Event A1 The serving cell becomes better than the absolute threshold (Serving becomes better than absolute threshold).
  • Event A2 The serving cell becomes worse than the absolute threshold (Serving becomes worst than absolute threshold).
  • Event A3 The neighboring cell becomes better than the primary cell or the primary and secondary cell by an offset value (Neighbour becomes better than PCell/PSCell).
  • Event A4 The neighboring cell becomes better than the absolute threshold (Neighbour becomes better than absolute threshold).
  • Event A5 The primary cell or primary secondary cell becomes worse than absolute threshold 1, and the neighboring cell or secondary cell becomes better than absolute threshold 2 (PCell/PSCell becomes Worse Threshold 1 AND Neighbour/SCell becomes better than another Absolute Threshold 2 ).
  • Event A6 The neighboring cell becomes better than the secondary cell by an offset value (Neighbour becomes amount of offset better than Scell).
  • Event B1 The neighboring cell becomes better than the absolute threshold (Neighbour becomes better than absolute threshold).
  • Event B2 The primary cell becomes better than absolute threshold 1, and the neighboring cell becomes better than absolute threshold 2 (PCell becomes worst than absolute threshold1 AND Neighbour becomes better than another absolute threshold2).
  • the measurement identifier is used to indicate the association relationship between the measurement object and the reported configuration.
  • the network device may configure the measurement object X to be associated with the event A1, and indicate the association relationship to the terminal device through the measurement identifier MeasId1.
  • the terminal device can start measuring the object X according to MeasId1, and report the measurement result to the network device according to the event A1.
  • the CHO configuration information may also include other parameters of the source cell, such as measurement gap, measurement opening threshold, and speed status parameters.
  • the terminal device After receiving the CHO configuration information containing the above information, the terminal device can perform the following steps.
  • the terminal device may perform measurement according to the CHO configuration information, and when the measurement result meets the trigger condition, determine whether to report based on the report configuration. If the measurement result meets the reporting conditions in the reporting configuration, the terminal device writes the measurement result into the measurement report, and sends the measurement report to the network device (source cell and/or target cell).
  • the network device source cell and/or target cell
  • the reporting configuration can be divided into three types, namely, the above-mentioned event-triggered reporting configuration, periodic-triggered reporting configuration, and event-triggered periodic reporting configuration.
  • the event-triggered reporting configuration includes event types and thresholds, and the duration (time to trigger) that meets the trigger condition.
  • the periodic trigger report configuration includes the report period and the purpose of the periodic trigger.
  • Type 1 Event triggers report configuration.
  • the configuration includes the following:
  • the reporting conditions that trigger the terminal device to send the measurement report include “Event A1” to "Event A6” and one of "Event B1” and “Event B2", and the threshold parameter corresponding to the event;
  • the number of reports is 1;
  • the terminal device ignores the reporting interval.
  • Type 2 Periodic report configuration.
  • the terminal device measures the measurement object indicated in the CHO configuration information, and sends a measurement report according to the specified reporting period and interval.
  • the configuration includes the following:
  • reporting purposes correspond to different reporting periods.
  • the reporting purposes include “report CGI (reportCGI)” and “report the strongest cell (reportStrongestCell)”;
  • the report purpose is "Report CGI”
  • the number of reports is equal to 1; if the report purpose is "Report the strongest cell”, the number of reports can be greater than 1;
  • the timer T321 can be started.
  • the network device source cell
  • the terminal device can send the measurement report in advance and stop the timer T321.
  • Type 3 Event triggers periodic reporting configuration.
  • the terminal device If the measurement value corresponding to the event enters the threshold and cuts for a period of time, the terminal device is triggered to send a measurement report. After the reporting process is triggered, the terminal device will start a timer and a counter. The timer is used to count the interval between multiple measurements, and the counter is used to count the number of measurements.
  • the configuration includes the following:
  • the reporting conditions that trigger the terminal device to send the measurement report include “Event A1” to "Event A5" and one of "Event B1” and “Event B2", and the threshold parameter corresponding to the event;
  • the number of reports is greater than 1;
  • the reporting interval is valid, and the terminal device sets the reporting cycle timer according to the configured interval parameter.
  • the terminal device can use part or all of the measurement configuration information of the source cell to perform CHO-related measurements. The two cases will be described separately below.
  • the terminal device uses all measurement configuration information of the source cell to perform CHO-related measurements.
  • the CHO configuration information received by the terminal device includes the measurement configuration identifier of the source cell, and the terminal device determines the measurement configuration parameters of the source cell according to the measurement configuration identifier (for example, the "event" mentioned above is used for source cell measurement. Configured parameters), and perform measurement according to the measurement configuration parameters to obtain a measurement result; subsequently, the terminal device determines whether to perform cell handover according to the CHO execution condition and the measurement result. If the measurement result meets the CHO execution condition, the terminal device performs cell switching; if the measurement result does not meet the CHO execution condition, the terminal device does not perform cell switching.
  • the measurement configuration parameters of the source cell for example, the "event" mentioned above is used for source cell measurement. Configured parameters
  • the terminal device determines whether to perform cell handover according to the CHO execution condition and the measurement result. If the measurement result meets the CHO execution condition, the terminal device performs cell switching; if the measurement result does not meet the CHO execution condition, the terminal device does not perform cell switching.
  • the terminal device can obtain the CHO execution condition through the RRC message. For example, when the network device sends the CHO configuration information through the RRC reconfiguration message, the CHO execution condition is sent to the terminal device through the RRC reconfiguration message.
  • the terminal device Since the CHO configuration information references all the measurement configuration information of the source cell, the terminal device only needs to maintain one set of variables. Therefore, compared to the solution of maintaining two sets of variables (the measurement configuration parameters of the source cell and the CHO measurement configuration parameters), the above maintenance A set of variable solutions can reduce the complexity of the terminal equipment to execute CHO.
  • the source cell can add one or more CHO candidate cells, or delete one or more CHO candidate cells to meet the needs of CHO.
  • deleting a CHO candidate cell it is only necessary to indicate the identity (ChoId) of the cell to be deleted in the CHO candidate cell list.
  • the content of the measurement configuration information of the source cell is as follows.
  • the message structure of the ChoIdToAddModList cell is as follows.
  • the source cell can modify or add a new CHO candidate cell (ie, candidate target cell).
  • targetCellConfig is the handover command generated by the target cell
  • ChoCondition is the CHO execution condition
  • the message structure of ChoCondition is as follows.
  • the source cell can configure the terminal device with a CHO execution condition including a set of conditions through the MeasId sequence.
  • MeasId refers to an existing measurement identifier in the measurement configuration information of the source cell. This solution does not require additional definition of measurement configuration in the CHO configuration information. If you need to add MeasId, MeasObjectId or reportConfigId related to CHO, you can add it to the measurement configuration information of the source cell.
  • the terminal device uses part of the measurement configuration information of the source cell to perform CHO-related measurements.
  • the CHO configuration information received by the terminal device includes a measurement configuration identifier, the measurement configuration identifier has a corresponding relationship with the measurement configuration parameters of the source cell, and the measurement configuration identifier has a corresponding relationship with the CHO measurement configuration parameters.
  • the terminal device determines the CHO measurement configuration parameter according to the measurement configuration identifier, and performs measurement according to the CHO measurement configuration parameter to obtain the measurement result; subsequently, the terminal device determines whether to perform cell handover according to the CHO execution condition and the measurement result. If the measurement result meets the CHO execution condition, the terminal device performs cell switching; if the measurement result does not meet the CHO execution condition, the terminal device does not perform cell switching.
  • the terminal device can obtain the CHO execution condition through the RRC message. For example, when the network device sends the CHO configuration information through the RRC reconfiguration message, the CHO execution condition is sent to the terminal device through the RRC reconfiguration message.
  • CHO measurement configuration parameters can be in the following form.
  • the CHO measurement configuration parameters received by the terminal device through the CHO configuration information can be saved in the above list.
  • the measurement configuration parameter of the source cell is offset (offset) 3dB, are stored in ReportConfigToAddModList; the CHO measurement configuration parameter is offset 5dB , Saved in ChoReportConfigToAddModList.
  • the network device can indicate two measurement configuration parameters using one identifier, thereby solving the problem of tight identification space.
  • the two sets of variables maintained by the terminal device each include three variables, namely, the CHO measurement identifier and the measurement identifier of the source cell, the CHO measurement object and the measurement object of the source cell, and the CHO reporting configuration and the reporting configuration of the source cell.
  • the two sets of variables maintained by the terminal device may also include the following variables.
  • Option 1 CHO measurement identification and source cell measurement identification, CHO reporting configuration and source cell reporting configuration, and measurement object.
  • the measurement object is a variable shared by the source cell measurement configuration and the CHO measurement configuration.
  • Option 2 CHO measurement object and measurement object of the source cell, CHO reporting configuration and source cell reporting configuration, and measurement identification.
  • the measurement identifier is a variable shared by the source cell measurement configuration and the CHO measurement configuration.
  • Option 3 CHO measurement identifier and source cell measurement identifier, CHO measurement object and source cell measurement object, and report configuration.
  • the report configuration is a variable shared by the source cell measurement configuration and the CHO measurement configuration.
  • Option 4 CHO measurement identifier and measurement identifier of the source cell, report configuration, and measurement object.
  • the report configuration and the measurement object are variables shared by the source cell measurement configuration and the CHO measurement configuration.
  • Option five CHO reporting configuration and source cell reporting configuration, measurement identification, and measurement object.
  • the measurement identifier and the measurement object are variables shared by the source cell measurement configuration and the CHO measurement configuration.
  • Option 6 CHO measurement object and measurement object of the source cell, report configuration, and measurement identification.
  • the report configuration and the measurement identifier are variables shared by the source cell measurement configuration and the CHO measurement configuration.
  • the source cell can add or modify one or more CHO candidate cells, or delete one or more CHO candidate cells to meet the needs of CHO.
  • deleting a CHO candidate cell it is only necessary to indicate the identity (ChoId) of the cell to be deleted in the CHO candidate cell list.
  • the content of the measurement configuration information of the source cell is as follows.
  • the message structure of the ChoIdToAddModList cell is as follows.
  • the source cell can modify or add a new CHO candidate cell (ie, candidate target cell).
  • targetCellConfig is the handover command generated by the target cell
  • ChoCondition is the CHO execution condition
  • the message structure of ChoCondition is as follows.
  • the source cell can configure the terminal device with a CHO execution condition including a set of conditions through the MeasId sequence.
  • MeasId is used to indicate the CHO execution condition. If the variable maintained by the terminal device includes the CHO measurement identifier, the MeasId in the above ChoCondition indicates the CHO measurement identifier; if the variable maintained by the terminal device does not include the CHO measurement identifier, then the above ChoCondition
  • the MeasId refers to the measurement identifier of the source cell.
  • the MeasId in ChoCondition can also be associated with the CHO measurement object and the CHO reporting configuration. If the variables maintained by the terminal device do not include the CHO measurement object and the CHO reporting configuration, the MeasId in the ChoCondition is associated with the measurement object of the source cell and the reporting configuration of the source cell.
  • the method 500 includes:
  • S510 Send CHO configuration information, where the CHO configuration information includes measurement configuration information of the source cell.
  • the method 500 may be executed by a network device or a chip in the network device.
  • This application does not limit the role of the network device, that is, the network device may be a network device corresponding to the source cell or a network device corresponding to the target cell.
  • the terminal equipment can use the measurement configuration information of the source cell to perform CHO-related measurements, reducing the number of measurement parameters maintained by the terminal equipment and reducing the CHO the complexity.
  • the measurement configuration information of the source cell includes a measurement configuration identifier of the source cell.
  • the measurement configuration identifier of the source cell includes at least one of a measurement identifier, a measurement object identifier, and a report configuration identifier of the source cell.
  • the measurement configuration information of the source cell includes a measurement configuration identifier, the measurement configuration identifier has a corresponding relationship with the measurement configuration parameters of the source cell, and the measurement configuration identifier has a corresponding relationship with the CHO measurement configuration parameters .
  • the CHO configuration parameter includes at least one of the following variables:
  • the measurement configuration information further includes CHO measurement configuration parameter modification information, and the CHO measurement configuration parameter modification information is used by the terminal device to modify the measurement configuration parameter of the source cell corresponding to the measurement configuration identifier.
  • the measurement configuration information further includes CHO measurement configuration parameter addition information, and the CHO measurement configuration parameter addition information is used by the terminal device to increase the CHO measurement configuration parameter corresponding to the measurement configuration identifier.
  • the measurement configuration information further includes CHO measurement configuration parameter deletion information, and the CHO measurement configuration parameter deletion information is used by the terminal device to delete the CHO measurement configuration parameter corresponding to the measurement configuration identifier.
  • the CHO configuration information is carried in a radio resource control RRC reconfiguration message.
  • the CHO 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 present application may divide the functional units of the CHO device according to the above method examples.
  • each function may be divided into each functional unit, or two or more functions may be integrated into one processing unit.
  • the above-mentioned integrated unit can be implemented in the form of hardware or software functional unit. It should be noted that the division of units in this application is illustrative, and is only a logical function division, and there may be other division methods in actual implementation.
  • Fig. 6 is a schematic structural diagram of a CHO device provided by the present application.
  • the device 600 includes a processing unit 610 and a receiving unit 620, and the processing unit 610 can control the receiving unit 620 to perform receiving steps. among them,
  • the receiving unit 620 is configured to receive CHO configuration information, where the CHO configuration information includes measurement configuration information of the source cell;
  • the processing unit 610 is configured to perform CHO processing according to the CHO configuration information.
  • the measurement configuration information of the source cell includes the measurement configuration identifier of the source cell, and the processing unit 610 is specifically configured to:
  • Cell switching is performed or not cell switching is performed according to the CHO execution condition and the measurement result.
  • the measurement configuration identifier of the source cell includes at least one of a measurement identifier, a measurement object identifier, and a report configuration identifier of the source cell.
  • the measurement configuration information of the source cell includes a measurement configuration identifier, the measurement configuration identifier has a corresponding relationship with the measurement configuration parameters of the source cell, and the measurement configuration identifier has a corresponding relationship with the CHO measurement configuration parameters ,
  • the processing unit 610 is specifically configured to:
  • Cell switching is performed or not cell switching is performed according to the CHO execution condition and the measurement result.
  • the CHO configuration parameter includes at least one of the following variables:
  • the measurement configuration information further includes CHO measurement configuration parameter modification information
  • the processing unit 610 is further configured to:
  • the measurement configuration information further includes CHO measurement configuration parameter addition information
  • the processing unit 610 is further configured to:
  • the CHO measurement configuration parameter corresponding to the measurement configuration identifier is added according to the CHO measurement configuration parameter addition information.
  • the measurement configuration information further includes CHO measurement configuration parameter deletion information
  • the processing unit 610 is further configured to:
  • the CHO configuration information is carried in an RRC reconfiguration message.
  • Fig. 7 is a schematic structural diagram of another CHO device provided by this application.
  • the device 700 includes a sending unit 710 for:
  • CHO configuration information includes measurement configuration information of the source cell.
  • the measurement configuration information of the source cell includes a measurement configuration identifier of the source cell.
  • the measurement configuration identifier of the source cell includes at least one of a measurement identifier, a measurement object identifier, and a report configuration identifier of the source cell.
  • the measurement configuration information of the source cell includes a measurement configuration identifier, the measurement configuration identifier has a corresponding relationship with the measurement configuration parameters of the source cell, and the measurement configuration identifier has a corresponding relationship with the CHO measurement configuration parameters .
  • the CHO configuration parameter includes at least one of the following variables:
  • the measurement configuration information further includes CHO measurement configuration parameter modification information, and the CHO measurement configuration parameter modification information is used by the terminal device to modify the measurement configuration parameter of the source cell corresponding to the measurement configuration identifier.
  • the measurement configuration information further includes CHO measurement configuration parameter addition information, and the CHO measurement configuration parameter addition information is used by the terminal device to increase the CHO measurement configuration parameter corresponding to the measurement configuration identifier.
  • the measurement configuration information further includes CHO measurement configuration parameter deletion information, and the CHO measurement configuration parameter deletion information is used by the terminal device to delete the CHO measurement configuration parameter corresponding to the measurement configuration identifier.
  • the CHO configuration information is carried in an RRC reconfiguration message.
  • Fig. 8 shows a schematic structural diagram of a CHO device provided by the present application.
  • the dotted line in Figure 8 indicates that the unit or the module is optional.
  • the device 800 may be used to implement the methods described in the foregoing method embodiments.
  • the device 800 may be a terminal device or a network device or a chip.
  • the device 800 includes one or more processors 801, and the one or more processors 801 can support the device 800 to implement the methods in the method embodiments corresponding to FIGS. 2 to 5.
  • the processor 801 may be a general-purpose processor or a special-purpose processor.
  • the processor 801 may be a central processing unit (CPU).
  • the CPU can be used to control the device 800, execute software programs, and process data of the software programs.
  • the device 800 may also include a communication unit 805 to implement signal input (reception) and output (transmission).
  • the device 800 may be a chip, and the communication unit 805 may be an input and/or output circuit of the chip, or the communication unit 805 may be a communication interface of the chip, and the chip may be used as a terminal device or a network device or other wireless communication device made of.
  • the device 800 may be a terminal device or a network device
  • the communication unit 805 may be a transceiver of the terminal device or the network device
  • the communication unit 805 may be a transceiver circuit of the terminal device or the network device.
  • the device 800 may include one or more memories 802 with a program 804 stored thereon, and the program 804 may be run by the processor 801 to generate instructions 803 so that the processor 801 executes the methods described in the foregoing method embodiments according to the instructions 803.
  • the memory 802 may also store data.
  • the processor 801 may also read data stored in the memory 802. The data may be stored at the same storage address as the program 804, or the data may be stored at a different storage address from the program 804.
  • the processor 801 and the memory 802 may be provided separately or integrated together, for example, integrated on a single board of a network device or a system on chip (SOC) of a terminal device.
  • SOC system on chip
  • the device 800 may also include an antenna 806.
  • the communication unit 805 is used to implement the transceiver function of the device 800 through the antenna 806.
  • the processor 801 may be a CPU, a digital signal processor (digital signal processor, DSP), an application specific integrated circuit (ASIC), a field programmable gate array (field programmable gate array, FPGA) or other programmable logic devices , For example, discrete gates, transistor logic devices, or discrete hardware components.
  • DSP digital signal processor
  • ASIC application specific integrated circuit
  • FPGA field programmable gate array
  • This application also provides a computer program product, which, when executed by the processor 801, implements the method described in any method embodiment in this application.
  • the computer program product may be stored in the memory 802, for example, a program 804, and the program 804 is finally converted into an executable object file that can be executed by the processor 801 after preprocessing, compilation, assembly, and linking.
  • This application also provides a computer-readable storage medium on which a computer program is stored, and when the computer program is executed by a computer, the method described in any method embodiment in this application is implemented.
  • the computer program can be a high-level language program or an executable target program.
  • the computer-readable storage medium is, for example, the memory 802.
  • the memory 802 may be a volatile memory or a non-volatile memory, or the memory 802 may include both a volatile memory and a non-volatile memory.
  • the non-volatile memory can be read-only memory (ROM), programmable read-only memory (programmable ROM, PROM), erasable programmable read-only memory (erasable PROM, EPROM), and electronic Erase programmable read-only memory (electrically EPROM, EEPROM) or flash memory.
  • the volatile memory may be random access memory (RAM), which is used as an external cache.
  • RAM random access memory
  • static random access memory static random access memory
  • dynamic RAM dynamic random access memory
  • synchronous dynamic random access memory synchronous DRAM, SDRAM
  • double data rate synchronous dynamic random access memory double data rate SDRAM, DDR SDRAM
  • enhanced synchronous dynamic random access memory enhanced SDRAM, ESDRAM
  • synchronous connection dynamic random access memory serial DRAM, SLDRAM
  • direct rambus RAM direct rambus RAM, DR RAM
  • the disclosed system, device, and method may be implemented in other ways. For example, some features of the method embodiments described above may be ignored or not implemented.
  • the device embodiments described above are merely illustrative.
  • the division of units is only a logical function division. In actual implementation, there may be other division methods, and multiple units or components may be combined or integrated into another system.
  • the coupling between the units or the coupling between the components may be direct coupling or indirect coupling, and the foregoing coupling includes electrical, mechanical, or other forms of connection.
  • the size of the sequence number of each process does not mean the order of execution.
  • the execution order of each process should be determined by its function and internal logic, and should not correspond to the embodiments of the present application.
  • the implementation process constitutes any limitation.
  • system and “network” in this article are often used interchangeably in this article.
  • the term “and/or” in this article is only an association relationship describing associated objects, which means that there can be three types of relationships. For example, A and/or B can mean that there is A alone, and both A and B exist. There are three cases of B.
  • the character “/” in this text generally indicates that the associated objects before and after are in an "or” relationship.

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Abstract

本申请提供了一种条件切换方法，包括：接收CHO配置信息，所述CHO配置信息包括源小区的测量配置信息；根据所述CHO配置信息执行CHO处理。在本申请提供的方案中，由于终端设备接收到的CHO配置信息包含源小区的测量配置信息，因此，终端设备可以利用源小区的测量配置信息执行与CHO相关的测量，减小终端设备维护的测量参数的数量，降低了CHO的复杂度。

Description

一种条件切换的方法和装置 技术领域
本申请涉及通信领域，具体涉及一种条件切换的方法和装置
背景技术
由于无线传输业务负荷量调整、激活操作维护、设备故障或者终端设备的移动性等原因，为了保证通信的连续性和服务的质量，通信系统需要将该终端设备与原小区的通信链路转移到新的小区上，即执行小区切换。
针对高速移动场景和高频部署场景存在频繁切换以及切换容易失败的问题，第三代合作计划(3rd generation partnership project，3GPP)计划引入基于条件触发的小区切换，即，条件切换(conditional handover，CHO)。终端设备在执行CHO之前，需要测量源小区和目标小区，随后基于测量结果和网络设备预先配置的条件确定是否进行从源小区切换至目标小区。如何配置执行CHO的终端设备进行小区测量是当前需要解决的问题。
发明内容
本申请提供了一种条件切换的方法和装置，能够减小终端设备维护的测量参数的数量，降低CHO的复杂度。
第一方面，提供了一种条件切换的方法，包括：接收CHO配置信息，所述CHO配置信息包括源小区的测量配置信息；根据所述CHO配置信息执行CHO处理。
第二方面，提供了另一种条件切换的方法，包括：发送CHO配置信息，所述CHO配置信息包括源小区的测量配置信息。
第三方面，提供了一种CHO装置，用于执行上述第一方面的方法。具体地，该装置包括用于执行第一方面中的方法的功能模块。
第四方面，提供了另一种CHO装置，用于执行上述第二方面的方法。具体地，该装置包括用于执行第二方面中的方法的功能模块。
第五方面，提供了一种CHO设备，包括处理器和存储器。该存储器用于存储计算机程序，该处理器用于调用并运行该存储器中存储的计算机程序，执行上述第一方面中的方法。
第六方面，提供了另一种CHO设备，包括处理器和存储器。该存储器用于存储计算机程序，该处理器用于调用并运行该存储器中存储的计算机程序，执行上述第二方面中的方法。
第七方面，提供了一种芯片，用于执行上述第一方面中的方法。具体地，该芯片包括：处理器，用于从存储器中调用并运行计算机程序，使得安装有该芯片的设备用于执行上述第一方面中的方法。
第八方面，提供了一种芯片，用于执行上述第二方面中的方法。具体地，该芯片包 括：处理器，用于从存储器中调用并运行计算机程序，使得安装有该芯片的设备用于执行上述第二方面中的方法。
第九方面，提供了一种计算机可读存储介质，用于存储计算机程序，该计算机程序使得计算机执行上述第一方面中的方法。
第十方面，提供了一种计算机可读存储介质，用于存储计算机程序，该计算机程序使得计算机执行上述第二方面中的方法。
第十一方面，提供了一种计算机程序产品，包括计算机程序指令，该计算机程序指令使得计算机执行上述第一方面中的方法。
第十二方面，提供了一种计算机程序产品，包括计算机程序指令，该计算机程序指令使得计算机执行上述第二方面中的方法。
第十三方面，提供了一种计算机程序，当其在计算机上运行时，使得计算机执行上述第一方面中的方法。
第十四方面，提供了一种计算机程序，当其在计算机上运行时，使得计算机执行上述第二方面中的方法。
在本申请提供的方案中，由于终端设备接收到的CHO配置信息包含源小区的测量配置信息，因此，终端设备可以利用源小区的测量配置信息执行与CHO相关的测量，减小终端设备维护的测量参数的数量，降低了CHO的复杂度。
附图说明
图1是一种适用于本申请的通信系统的示意图；
图2是本申请提供的一种CHO流程的示意图；
图3是本申请提供的一种RRC消息的结构示意图；
图4是本申请提供的一种CHO方法的示意图；
图5是本申请提供的另一种CHO方法的示意图；
图6是本申请提供的一种CHO装置的示意图；
图7是本申请提供的另一种CHO装置的示意图；
图8是本申请提供的一种CHO设备的示意图。
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，显然，所描述的实施例是本申请一部分实施例，而不是全部的实施例。基于本申请中的实施例，本领域普通技术人员在没有做出创造性劳动前提下所获得的所有其他实施例，都属于本申请保护的范围。
首先介绍本申请的应用场景，图1是一种适用于本申请的通信系统的示意图。
通信系统100包括网络设备110、网络设备120和终端设备130。终端设备130通过电磁波与网络设备110和/或网络设备120进行通信。
在本申请中，终端设备130可以包括各种具有无线通信功能的手持设备、车载设备、可穿戴设备、计算设备或连接到无线调制解调器的其它处理设备，例如，第三代合作计划(3 rdgeneration partnership project，3GPP)所定义的用户设备(user equipment，UE)，移动台(mobile station，MS)，软终端，家庭网关，机顶盒等等。
网络设备110可以是3GPP所定义的基站，例如，第五代(5 thgeneration，5G)通信系统中的基站(gNB)。网络设备110也可以是非3GPP(non-3GPP)的接入网设备，例如接入网关(access gateway，AGF)。网络设备110还可以是中继站、接入点、车载设备、可穿戴设备以及其它类型的设备。
网络设备120可以是3GPP所定义的基站，例如，5G通信系统中的基站(gNB)。网络设备120也可以是非3GPP(non-3GPP)的接入网设备，例如AGF。网络设备120还可以是中继站、接入点、车载设备、可穿戴设备以及其它类型的设备。
通信系统100仅是举例说明，适用本申请的通信系统不限于此，例如，通信系统100中包含的网络设备和终端设备的数量还可以是其它的数量。为了简洁，下文中的终端设备和网络设备不再附带附图标记。
图2示出了本申请提供的一种CHO流程的示意图。该流程包括：
S210，测量配置和上报。
网络设备向终端设备发送测量配置信息，该配置信息指示终端设备需要执行哪些测量操作以及上报方式。
S220，切换准备。
终端设备根据测量配置信息指示的测量对象等参数检测邻小区的信号质量状态，并将测量结果上报给网络设备，以便于网络设备进行切换或者完善邻小区关系列表。
S230，网络设备向终端设备发送切换条件。
切换条件例如是测量值进入门限并且持续一段时间。若终端设备确定当前的测量值满足切换条件，则执行下述切换步骤。
S240，当条件符合时，与目标小区进行同步。
例如，目标小区分别请求接入和移动性管理功能(access and mobility management function，AFM)和目标小区与用户面功能(user plane function，UPF)进行路径切换，释放源基站的UE上下文，以便于与终端设备完成同步。
在CHO流程中，网络设备可以通过无线资源控制(radio resource control，RRC)重配置消息向终端设备发送CHO配置信息，用于终端设备执行CHO相关的处理，例如，用于终端设备执行CHO测量。可选地，该RRC重配置消息还包括承载源小区的测量配置信息的字段，该字段承载的源小区的测量配置信息用于终端设备进行连接状态下的移动性测量，例如，无线资源管理(radio resource management，RRM)测量。
如图3所示，RRC重配置消息包括第一字段和第二字段，其中，第一字段用于承载源小区的测量配置信息，第二字段用于承载CHO测量配置信息。终端设备接收到RRC重配置消息后，根据该消息进行RRM测量和CHO测量。
需要说明的是，本申请中，“第一”、“第二”仅用于表示不同的个体，例如，第一字段和第二字段表示两个不同的字段，除此之外，不存在其它限定。
下面，将详细描述本申请提供的条件切换的方法。
如图4所示，方法400包括：
S410，接收CHO配置信息，所述CHO配置信息包括源小区的测量配置信息。
方法400可以由终端设备或者终端设备中的芯片执行。CHO配置信息例如承载于RRC重配置消息的第二字段中，CHO配置信息中所包含的源小区的测量配置信息用于终端执行与CHO相关的处理，例如，进行同频或异频测量，以便于确定是否从源小区切换至目标小区。
CHO配置信息中所包含的源小区的测量配置信息可以是测量配置标识，该测量配置标识例如是源小区的测量对象标识(measurement object ID，MeasObjectId)、上报配置标识(measurement report config ID，reportConfigId)和测量标识(measurement ID，MeasId)中的至少一个。
上述各个标识用于指示不同的测量内容，下面分别对上述标识所指示的内容作简要介绍。应理解，下文所述的各个标识指示的内容仅是一些示例，适用于本申请的内容不限于此。
1)测量对象标识。
测量对象标识用于指示测量对象。测量对象为频点，例如是一个演进的通用无线接入(evolved universal terrestrial radio access，E-UTRA)载波频率。与该载波频率相关的小区，网络设备可以配置小区偏移量(Offset)列表和黑名单小区列表，终端设备在测量评估及测量报告中不对黑名单的小区进行任何操作。
2)上报配置标识。
上报配置标识用于指示上报配置。上报配置可以分为事件触发上报配置、周期触发上报配置以及事件触发周期上报配置。下文将介绍这三种配置的具体内容，其中，事件触发上报配置所包括的测量事件例如是：
事件A1：服务小区变得好于绝对阈值(Serving becomes better than absolute threshold)。
事件A2：服务小区变得差于绝对阈值(Serving becomes worse than absolute threshold)。
事件A3：邻小区变得比主小区或主辅小区好于一个偏移值(Neighbour becomes amount of offset better than PCell/PSCell)。
事件A4：邻小区变得好于绝对阈值(Neighbour becomes better than absolute threshold)。
事件A5：主小区或主辅小区变得差于绝对阈值1，并且，邻小区或辅小区变得好于绝对阈值2(PCell/PSCell becomes worse than absolute threshold1 AND Neighbour/SCell becomes better than another absolute threshold2)。
事件A6：邻小区变得比辅小区好于一个偏移值(Neighbour becomes amount of offset  better than Scell)。
事件B1：邻小区变得好于绝对阈值(Neighbour becomes better than absolute threshold)。
事件B2：主小区变得好于绝对阈值1，并且，邻小区变得好于绝对阈值2(PCell becomes worse than absolute threshold1 AND Neighbour becomes better than another absolute threshold2)。
3)测量标识。
测量标识用于指示测量对象与上报配置的关联关系。例如，网络设备可以配置测量对象X与事件A1关联，并且，通过测量标识MeasId1向终端设备指示该关联关系。当测量对象X达到测量开启门限时，终端设备可以根据MeasId1开始测量对象X，并根据事件A1向网络设备上报测量结果。
CHO配置信息除了包含指示上述内容的标识之外，还可以包括源小区的其它参数，例如，测量间隔(measurement gap)、测量开启门限以及速度状态参数等。
终端设备接收到包含上述信息的CHO配置信息之后，可以执行下述步骤。
S420，根据所述CHO配置信息执行CHO处理。
例如，终端设备可以根据CHO配置信息进行测量，当测量结果满足触发条件时基于上报配置确定是否进行上报。如果测量结果满足上报配置中的上报条件，终端设备将测量结果写入测量报告，并将测量报告发送给网络设备(源小区和/或目标小区)。
上报配置可以分为三种类型，即，上文所述的事件触发上报配置、周期触发上报配置以及事件触发周期上报配置。其中，事件触发上报配置包括事件种类及门限值，以及满足触发条件的持续时间(time to trigger)。周期触发上报配置包括上报周期，以及周期性触发的目的。
类型一：事件触发上报配置。
若事件对应的测量值进入门限并且持续一段时间，则触发终端设备发送测量报告。该配置包括以下内容：
触发终端设备发送测量报告的上报条件包括“事件A1”至“事件A6”以及“事件B1”和“事件B2”中的一个事件，以及该事件对应的门限参数；
上报次数为1；
终端设备忽略上报间隔。
类型二：周期上报配置。
终端设备对CHO配置信息中指示的测量对象进行测量，并按照规定的上报周期及间隔发送测量报告。该配置包括以下内容：
不同的上报目的对应不同的上报周期，上报目的包括“上报CGI(reportCGI)”和“上报最强小区(reportStrongestCell)”；
若上报目的为“上报CGI”，则上报次数等于1；若上报目的为“上报最强小区”，则上报次数可以大于1；
终端设备被配置了“上报CGI”之后，可以开启定时器T321。为了网络设备(源小区)能够尽快获得组建邻小区列表所需信息，若终端设备在定时器T321超时前已获得了上报所需的内容，则终端设备可以提前发送测量报告并停止定时器T321。
类型三：事件触发周期上报配置。
若事件对应的测量值进入门限并切持续一段时间，则触发终端设备发送测量报告。上报流程被触发后，终端设备将开启定时器和计数器，该定时器用于统计多次测量之间间隔的定时器，该计数器用于统计测量次数。该配置包括以下内容：
触发终端设备发送测量报告的上报条件包括“事件A1”至“事件A5”以及“事件B1”和“事件B2”中的一个事件，以及该事件对应的门限参数；
上报次数大于1；
上报间隔有效，终端设备按照配置的间隔参数设置上报周期定时器。
由于终端设备接收到的CHO配置信息包含源小区的测量配置信息，因此，终端设备可以利用源小区的测量配置信息执行与CHO相关的测量，减小终端设备维护的测量参数的数量，降低了CHO的复杂度。
在执行CHO处理的过程中，终端设备可以利用源小区的部分或全部测量配置信息执行与CHO相关的测量，下面，分别对这两种情况进行说明。
作为一个可选的实施方式，终端设备利用源小区的全部测量配置信息进行与CHO相关的测量。
例如，终端设备接收到的CHO配置信息中包含源小区的测量配置标识，终端设备根据该测量配置标识确定源小区的测量配置参数(例如，上文所述的“事件”等用于源小区测量配置的参数)，并且，根据该测量配置参数进行测量，得到测量结果；随后，终端设备根据CHO执行条件和测量结果确定是否进行小区切换。若测量结果满足CHO执行条件，终端设备进行小区切换；若测量结果不满足CHO执行条件，终端设备不进行小区切换。
终端设备可以通过RRC消息获取CHO执行条件，例如，网络设备通过RRC重配置消息发送CHO配置信息时，通过该RRC重配置消息将CHO执行条件发送至终端设备。
由于CHO配置信息引用了源小区的全部测量配置信息，终端设备仅需维护一套变量，因此，相比于维护两套变量(源小区的测量配置参数和CHO测量配置参数)的方案，上述维护一套变量的方案能够减小终端设备执行CHO的复杂度。
源小区可以新增一个或多个CHO候选小区，也可以删除一个或多个CHO候选小区，以满足CHO的需求。在删除CHO候选小区时，只需要指示待删除的小区在CHO候选小区列表中的标识(ChoId)即可。源小区的测量配置信息的内容如下所示。
Figure PCTCN2019095479-appb-000001
Figure PCTCN2019095479-appb-000002
其中，ChoIdToAddModList信元的消息结构如下。
Figure PCTCN2019095479-appb-000003
基于ChoId，源小区可以修改或添加新的CHO候选小区(即，候选目标小区)。其中，targetCellConfig是目标小区生成的切换命令，ChoCondition是CHO执行条件，ChoCondition的消息结构如下。
ChoCondition::＝            SEQUENCE(SIZE(1..maxNrofChoCondition))OF MeasId
源小区可以通过MeasId序列为终端设备配置包含一组条件的CHO执行条件。其中MeasId引用的是源小区的测量配置信息中已有测量标识。此方案不需要在CHO配置信息中额外定义测量配置，若需要新增与CHO相关的MeasId、MeasObjectId或reportConfigId，可以在源小区的测量配置信息中增加。
ChoCondition的另一种消息结构可以是列表，如下所示。
Figure PCTCN2019095479-appb-000004
作为另一个可选的实施方式，终端设备利用源小区的部分测量配置信息进行与CHO相关的测量。
例如，终端设备接收到的CHO配置信息中包含测量配置标识，该测量配置标识与源小区的测量配置参数存在对应关系，并且，该测量配置标识与CHO测量配置参数存在对 应关系。
终端设备根据该测量配置标识确定CHO测量配置参数，并且，根据该CHO测量配置参数进行测量，得到测量结果；随后，终端设备根据CHO执行条件和测量结果确定是否进行小区切换。若测量结果满足CHO执行条件，终端设备进行小区切换；若测量结果不满足CHO执行条件，终端设备不进行小区切换。
终端设备可以通过RRC消息获取CHO执行条件，例如，网络设备通过RRC重配置消息发送CHO配置信息时，通过该RRC重配置消息将CHO执行条件发送至终端设备。
由于CHO配置信息引用了源小区的部分测量配置信息，终端设备需要维护两套变量，即，源小区的测量配置参数和CHO测量配置参数。终端设备可以使用前缀Cho标识CHO测量配置参数。例如，CHO测量配置参数可以是如下形式。
ChoMeasIdToAddModList,
ChoMeasObjectToAddModList,
ChoReportConfigToAddModList。
终端设备通过CHO配置信息收到的CHO测量配置参数可以保存在上述列表中。以测量配置标识指示前文所述的事件A3为例，终端设备侧保存的两个变量，源小区的测量配置参数是偏移(offset)3dB，保存在ReportConfigToAddModList中；CHO测量配置参数是偏移5dB，保存在ChoReportConfigToAddModList中。
上述方案中，终端设备虽然维护了两套变量，但是，网络设备使用一个标识即可指示两个测量配置参数，从而解决了标识空间紧张的问题。
上述方案中，终端设备维护的两套变量各自包含3种变量，即，CHO测量标识和源小区的测量标识、CHO测量对象和源小区的测量对象、以及CHO上报配置和源小区的上报配置。可选地，终端设备所维护的两套变量还可以包含下列变量。
选项一：CHO测量标识和源小区的测量标识、CHO上报配置和源小区的上报配置、以及测量对象。其中，该测量对象为源小区测量配置和CHO测量配置共用的变量。
选项二：CHO测量对象和源小区的测量对象、CHO上报配置和源小区的上报配置、以及测量标识。其中，该测量标识为源小区测量配置和CHO测量配置共用的变量。
选项三：CHO测量标识和源小区的测量标识、CHO测量对象和源小区的测量对象、以及上报配置。其中，该上报配置为源小区测量配置和CHO测量配置共用的变量。
选项四：CHO测量标识和源小区的测量标识、上报配置、以及测量对象。其中，该上报配置和该测量对象为源小区测量配置和CHO测量配置共用的变量。
选项五：CHO上报配置和源小区的上报配置、测量标识、以及测量对象。其中，该测量标识和该测量对象为源小区测量配置和CHO测量配置共用的变量。
选项六：CHO测量对象和源小区的测量对象、上报配置、以及测量标识。其中，该上报配置和该测量标识为源小区测量配置和CHO测量配置共用的变量。
源小区可以新增或修改一个或多个CHO候选小区，也可以删除一个或多个CHO候选小区，以满足CHO的需求。在删除CHO候选小区时，只需要指示待删除的小区在CHO 候选小区列表中的标识(ChoId)即可。源小区的测量配置信息的内容如下所示。
Figure PCTCN2019095479-appb-000005
其中，ChoIdToAddModList信元的消息结构如下。
Figure PCTCN2019095479-appb-000006
基于ChoId，源小区可以修改或添加新的CHO候选小区(即，候选目标小区)。其中，targetCellConfig是目标小区生成的切换命令，ChoCondition是CHO执行条件，ChoCondition的消息结构如下。
ChoCondition::＝             SEQUENCE(SIZE(1..maxNrofChoCondition))OF MeasId
源小区可以通过MeasId序列为终端设备配置包含一组条件的CHO执行条件。MeasId用于指示CHO执行条件，其中，若终端设备维护的变量中包括CHO测量标识，则上述ChoCondition中的MeasId指示CHO测量标识；若终端设备维护的变量中不包括CHO测量标识，则上述ChoCondition中的MeasId引用的是源小区的测量标识。
ChoCondition中的MeasId还可以关联CHO测量对象和CHO上报配置，若终端设备维护的变量不包括CHO测量对象和CHO上报配置，则ChoCondition中的MeasId关联源小区的测量对象和源小区的上报配置。
ChoCondition的另一种消息结构可以是列表，如下所示。
Figure PCTCN2019095479-appb-000007
上文从终端设备的角度详细描述了本申请提供的条件切换的方法，下面，从网络设备的角度描述本申请提供的条件切换的方法。
如图5所示，方法500包括：
S510，发送CHO配置信息，所述CHO配置信息包括源小区的测量配置信息。
方法500可以由网络设备或者网络设备中的芯片执行，本申请对该网络设备的角色不做限定，即，该网络设备可以是源小区对应的网络设备，也可以是目标小区对应的网络设备。
由于网络设备发送的CHO配置信息包含源小区的测量配置信息，因此，终端设备可以利用源小区的测量配置信息执行与CHO相关的测量，减小终端设备维护的测量参数的数量，降低了CHO的复杂度。
可选地，所述源小区的测量配置信息包括所述源小区的测量配置标识。
可选地，所述源小区的测量配置标识包括所述源小区的测量标识、测量对象标识和上报配置标识中的至少一个。
可选地，所述源小区的测量配置信息包括测量配置标识，所述测量配置标识与所述源小区的测量配置参数存在对应关系，并且，所述测量配置标识与CHO测量配置参数存在对应关系。
可选地，所述CHO配置参数包括以下变量中的至少一个：
CHO测量标识；
CHO测量对象；
CHO上报配置。
可选地，测量配置信息还包括CHO测量配置参数修改信息，所述CHO测量配置参数修改信息用于终端设备修改所述测量配置标识对应的源小区的测量配置参数。
可选地，测量配置信息还包括CHO测量配置参数增加信息，所述CHO测量配置参数增加信息用于终端设备增加所述测量配置标识对应的CHO测量配置参数。
可选地，测量配置信息还包括CHO测量配置参数删除信息，所述CHO测量配置参数删除信息用于终端设备删除所述测量配置标识对应的CHO测量配置参数。
可选地，所述CHO配置信息承载于无线资源控制RRC重配置消息中。
网络设备执行CHO的具体方式以及产生的技术效果可以参考图2至图4对应的实施例，为了简洁，在此不再赘述。
上文详细介绍了本申请提供的CHO方法的示例。可以理解的是，CHO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。
本申请可以根据上述方法示例对CHO装置进行功能单元的划分，例如，可以将各个功能划分为各个功能单元，也可以将两个或两个以上的功能集成在一个处理单元中。上述集成的单元既可以采用硬件的形式实现，也可以采用软件功能单元的形式实现。需要说明的是，本申请中对单元的划分是示意性的，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。
图6是本申请提供的一种CHO装置的结构示意图。该装置600包括处理单元610和接收单元620，处理单元610能够控制接收单元620执行接收步骤。其中，
接收单元620用于：接收CHO配置信息，所述CHO配置信息包括源小区的测量配置信息；
处理单元610用于：根据所述CHO配置信息执行CHO处理。
可选地，所述源小区的测量配置信息包括所述源小区的测量配置标识，所述处理单元610具体用于：
根据所述源小区的测量配置标识确定所述源小区的测量配置参数；
根据所述源小区的测量配置参数进行测量；
根据CHO执行条件和所述测量的结果进行小区切换或者不进行小区切换。
可选地，所述源小区的测量配置标识包括所述源小区的测量标识、测量对象标识和上报配置标识中的至少一个。
可选地，所述源小区的测量配置信息包括测量配置标识，所述测量配置标识与所述源小区的测量配置参数存在对应关系，并且，所述测量配置标识与CHO测量配置参数存 在对应关系，所述处理单元610具体用于：
根据所述测量配置标识确定所述CHO测量配置参数；
根据所述CHO测量配置参数进行测量；
根据CHO执行条件和所述测量的结果进行小区切换或者不进行小区切换。
可选地，所述CHO配置参数包括以下变量中的至少一个：
CHO测量标识；CHO测量对象；CHO上报配置。
可选地，所述测量配置信息还包括CHO测量配置参数修改信息，所述处理单元610还用于：
根据所述CHO测量配置参数修改信息修改所述测量配置标识对应的源小区的测量配置参数，获得所述CHO测量配置参数。
可选地，所述测量配置信息还包括CHO测量配置参数增加信息，所述处理单元610还用于：
根据所述CHO测量配置参数增加信息增加所述测量配置标识对应的CHO测量配置参数。
可选地，所述测量配置信息还包括CHO测量配置参数删除信息，所述处理单元610还用于：
根据所述CHO测量配置参数删除信息删除所述测量配置标识对应的CHO测量配置参数。
可选地，所述CHO配置信息承载于RRC重配置消息中。
图7是本申请提供的另一种CHO装置的结构示意图。该装置700包括发送单元710，用于：
发送CHO配置信息，所述CHO配置信息包括源小区的测量配置信息。
可选地，所述源小区的测量配置信息包括所述源小区的测量配置标识。
可选地，所述源小区的测量配置标识包括所述源小区的测量标识、测量对象标识和上报配置标识中的至少一个。
可选地，所述源小区的测量配置信息包括测量配置标识，所述测量配置标识与所述源小区的测量配置参数存在对应关系，并且，所述测量配置标识与CHO测量配置参数存在对应关系。
可选地，所述CHO配置参数包括以下变量中的至少一个：
CHO测量标识；CHO测量对象；CHO上报配置。
可选地，所述测量配置信息还包括CHO测量配置参数修改信息，所述CHO测量配置参数修改信息用于终端设备修改所述测量配置标识对应的源小区的测量配置参数。
可选地，所述测量配置信息还包括CHO测量配置参数增加信息，所述CHO测量配置参数增加信息用于终端设备增加所述测量配置标识对应的CHO测量配置参数。
可选地，所述测量配置信息还包括CHO测量配置参数删除信息，所述CHO测量配置参数删除信息用于终端设备删除所述测量配置标识对应的CHO测量配置参数。
可选地，所述CHO配置信息承载于RRC重配置消息中。
图8示出了本申请提供的一种CHO设备的结构示意图。图8中的虚线表示该单元或该模块为可选的。设备800可用于实现上述方法实施例中描述的方法。设备800可以是终端设备或网络设备或芯片。
设备800包括一个或多个处理器801，该一个或多个处理器801可支持设备800实现图2至图5所对应方法实施例中的方法。处理器801可以是通用处理器或者专用处理器。例如，处理器801可以是中央处理器(central processing unit，CPU)。CPU可以用于对设备800进行控制，执行软件程序，处理软件程序的数据。设备800还可以包括通信单元805，用以实现信号的输入(接收)和输出(发送)。
例如，设备800可以是芯片，通信单元805可以是该芯片的输入和/或输出电路，或者，通信单元805可以是该芯片的通信接口，该芯片可以作为终端设备或网络设备或其它无线通信设备的组成部分。
又例如，设备800可以是终端设备或网络设备，通信单元805可以是该终端设备或该网络设备的收发器，或者，通信单元805可以是该终端设备或该网络设备的收发电路。
设备800中可以包括一个或多个存储器802，其上存有程序804，程序804可被处理器801运行，生成指令803，使得处理器801根据指令803执行上述方法实施例中描述的方法。可选地，存储器802中还可以存储有数据。可选地，处理器801还可以读取存储器802中存储的数据，该数据可以与程序804存储在相同的存储地址，该数据也可以与程序804存储在不同的存储地址。
处理器801和存储器802可以单独设置，也可以集成在一起，例如，集成在网络设备的单板或者终端设备的系统级芯片(system on chip，SOC)上。
设备800还可以包括天线806。通信单元805用于通过天线806实现设备800的收发功能。
处理器801执行CHO方法的具体方式可以参见方法实施例中的相关描述。
应理解，上述方法实施例的各步骤可以通过处理器801中的硬件形式的逻辑电路或者软件形式的指令完成。处理器801可以是CPU、数字信号处理器(digital signal processor，DSP)、专用集成电路(application specific integrated circuit，ASIC)、现场可编程门阵列(field programmable gate array，FPGA)或者其它可编程逻辑器件，例如，分立门、晶体管逻辑器件或分立硬件组件。
本申请还提供了一种计算机程序产品，该计算机程序产品被处理器801执行时实现本申请中任一方法实施例所述的方法。
该计算机程序产品可以存储在存储器802中，例如是程序804，程序804经过预处理、编译、汇编和链接等处理过程最终被转换为能够被处理器801执行的可执行目标文件。
本申请还提供了一种计算机可读存储介质，其上存储有计算机程序，该计算机程序被计算机执行时实现本申请中任一方法实施例所述的方法。该计算机程序可以是高级语言程序，也可以是可执行目标程序。
该计算机可读存储介质例如是存储器802。存储器802可以是易失性存储器或非易失性存储器，或者，存储器802可以同时包括易失性存储器和非易失性存储器。其中，非易失性存储器可以是只读存储器(read-only memory，ROM)、可编程只读存储器(programmable ROM，PROM)、可擦除可编程只读存储器(erasable PROM，EPROM)、电可擦除可编程只读存储器(electrically EPROM，EEPROM)或闪存。易失性存储器可以是随机存取存储器(random access memory，RAM)，其用作外部高速缓存。通过示例性但不是限制性说明，许多形式的RAM可用，例如静态随机存取存储器(static RAM，SRAM)、动态随机存取存储器(dynamic RAM，DRAM)、同步动态随机存取存储器(synchronous DRAM，SDRAM)、双倍数据速率同步动态随机存取存储器(double data rate SDRAM，DDR SDRAM)、增强型同步动态随机存取存储器(enhanced SDRAM，ESDRAM)、同步连接动态随机存取存储器(synchlink DRAM，SLDRAM)和直接内存总线随机存取存储器(direct rambus RAM，DR RAM)。
本领域的技术人员可以清楚地了解到，为了描述的方便和简洁，上述描述的装置和设备的具体工作过程以及产生的技术效果，可以参考前述方法实施例中对应的过程和技术效果，在此不再赘述。
在本申请所提供的几个实施例中，所揭露的系统、装置和方法，可以通过其它的方式实现。例如，以上所描述的方法实施例的一些特征可以忽略，或不执行。以上所描述的装置实施例仅仅是示意性的，单元的划分，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，多个单元或组件可以结合或者可以集成到另一个系统。另外，各单元之间的耦合或各个组件之间的耦合可以是直接耦合，也可以是间接耦合，上述耦合包括电的、机械的或其它形式的连接。
应理解，在本申请的各种实施例中，各过程的序号的大小并不意味着执行顺序的先后，各过程的执行顺序应以其功能和内在逻辑确定，而不应对本申请的实施例的实施过程构成任何限定。
另外，本文中术语“系统”和“网络”在本文中常被可互换使用。本文中的术语“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。另外，本文中字符“/”，一般表示前后关联对象是一种“或”的关系。
总之，以上所述仅为本申请技术方案的较佳实施例而已，并非用于限定本申请的保护范围。凡在本申请的精神和原则之内，所作的任何修改、等同替换、改进等，均应包含在本申请的保护范围之内。

Claims (46)

  1. 一种条件切换方法，其特征在于，包括：
    接收条件切换CHO配置信息，所述CHO配置信息包括源小区的测量配置信息；
    根据所述CHO配置信息执行CHO处理。
  2. 根据权利要求1所述的方法，其特征在于，所述源小区的测量配置信息包括所述源小区的测量配置标识，所述根据所述CHO配置信息执行CHO处理，包括：
    根据所述源小区的测量配置标识确定所述源小区的测量配置参数；
    根据所述源小区的测量配置参数进行测量；
    根据CHO执行条件和所述测量的结果进行小区切换或者不进行小区切换。
  3. 根据权利要求2所述的方法，其特征在于，所述源小区的测量配置标识包括所述源小区的测量标识、测量对象标识和上报配置标识中的至少一个。
  4. 根据权利要求1所述的方法，其特征在于，所述源小区的测量配置信息包括测量配置标识，所述测量配置标识与所述源小区的测量配置参数存在对应关系，并且，所述测量配置标识与CHO测量配置参数存在对应关系，
    所述根据所述CHO配置信息执行CHO处理，包括：
    根据所述测量配置标识确定所述CHO测量配置参数；
    根据所述CHO测量配置参数进行测量；
    根据CHO执行条件和所述测量的结果进行小区切换或者不进行小区切换。
  5. 根据权利要求4所述的方法，其特征在于，所述CHO配置参数包括以下变量中的至少一个：
    CHO测量标识；CHO测量对象；CHO上报配置。
  6. 根据权利要求4或5所述的方法，其特征在于，所述测量配置信息还包括CHO测量配置参数修改信息，所述方法还包括：
    根据所述CHO测量配置参数修改信息修改所述测量配置标识对应的源小区的测量配置参数，获得所述CHO测量配置参数。
  7. 根据权利要求4至6中任一项所述的方法，其特征在于，所述测量配置信息还包括CHO测量配置参数增加信息，所述方法还包括：
    根据所述CHO测量配置参数增加信息增加所述测量配置标识对应的CHO测量配置参数。
  8. 根据权利要求4至7中任一项所述的方法，其特征在于，所述测量配置信息还包括CHO测量配置参数删除信息，所述方法还包括：
    根据所述CHO测量配置参数删除信息删除所述测量配置标识对应的CHO测量配置参数。
  9. 根据权利要求1至8中任一项所述的方法，其特征在于，所述CHO配置信息承载于无线资源控制RRC重配置消息中。
  10. 一种条件切换方法，其特征在于，包括：
    发送条件切换CHO配置信息，所述CHO配置信息包括源小区的测量配置信息。
  11. 根据权利要求10所述的方法，其特征在于，所述源小区的测量配置信息包括所述源小区的测量配置标识。
  12. 根据权利要求11所述的方法，其特征在于，所述源小区的测量配置标识包括所述源小区的测量标识、测量对象标识和上报配置标识中的至少一个。
  13. 根据权利要求10所述的方法，其特征在于，所述源小区的测量配置信息包括测量配置标识，所述测量配置标识与所述源小区的测量配置参数存在对应关系，并且，所述测量配置标识与CHO测量配置参数存在对应关系。
  14. 根据权利要求13所述的方法，其特征在于，所述CHO配置参数包括以下变量中的至少一个：
    CHO测量标识；CHO测量对象；CHO上报配置。
  15. 根据权利要求13或14所述的方法，其特征在于，所述测量配置信息还包括CHO测量配置参数修改信息，所述CHO测量配置参数修改信息用于终端设备修改所述测量配置标识对应的源小区的测量配置参数。
  16. 根据权利要求13至15中任一项所述的方法，其特征在于，所述测量配置信息还包括CHO测量配置参数增加信息，所述CHO测量配置参数增加信息用于终端设备增加所述测量配置标识对应的CHO测量配置参数。
  17. 根据权利要求13至16中任一项所述的方法，其特征在于，所述测量配置信息还包括CHO测量配置参数删除信息，所述CHO测量配置参数删除信息用于终端设备删除所述测量配置标识对应的CHO测量配置参数。
  18. 根据权利要求10至17中任一项所述的方法，其特征在于，所述CHO配置信息承载于无线资源控制RRC重配置消息中。
  19. 一种条件切换的装置，其特征在于，包括接收单元和处理单元，
    所述接收单元用于：接收条件切换CHO配置信息，所述CHO配置信息包括源小区的测量配置信息；
    所述处理单元用于：根据所述CHO配置信息执行CHO处理。
  20. 根据权利要求19所述的装置，其特征在于，所述源小区的测量配置信息包括所述源小区的测量配置标识，所述处理单元具体用于：
    根据所述源小区的测量配置标识确定所述源小区的测量配置参数；
    根据所述源小区的测量配置参数进行测量；
    根据CHO执行条件和所述测量的结果进行小区切换或者不进行小区切换。
  21. 根据权利要求20所述的装置，其特征在于，所述源小区的测量配置标识包括所述源小区的测量标识、测量对象标识和上报配置标识中的至少一个。
  22. 根据权利要求19所述的装置，其特征在于，所述源小区的测量配置信息包括测量配置标识，所述测量配置标识与所述源小区的测量配置参数存在对应关系，并且，所 述测量配置标识与CHO测量配置参数存在对应关系，所述处理单元具体用于：
    根据所述测量配置标识确定所述CHO测量配置参数；
    根据所述CHO测量配置参数进行测量；
    根据CHO执行条件和所述测量的结果进行小区切换或者不进行小区切换。
  23. 根据权利要求22所述的装置，其特征在于，所述CHO配置参数包括以下变量中的至少一个：
    CHO测量标识；CHO测量对象；CHO上报配置。
  24. 根据权利要求22或23所述的装置，其特征在于，所述测量配置信息还包括CHO测量配置参数修改信息，所述处理单元还用于：
    根据所述CHO测量配置参数修改信息修改所述测量配置标识对应的源小区的测量配置参数，获得所述CHO测量配置参数。
  25. 根据权利要求22至24中任一项所述的装置，其特征在于，所述测量配置信息还包括CHO测量配置参数增加信息，所述处理单元还用于：
    根据所述CHO测量配置参数增加信息增加所述测量配置标识对应的CHO测量配置参数。
  26. 根据权利要求22至25中任一项所述的装置，其特征在于，所述测量配置信息还包括CHO测量配置参数删除信息，所述处理单元还用于：
    根据所述CHO测量配置参数删除信息删除所述测量配置标识对应的CHO测量配置参数。
  27. 根据权利要求19至26中任一项所述的装置，其特征在于，所述CHO配置信息承载于无线资源控制RRC重配置消息中。
  28. 一种条件切换的装置，其特征在于，包括发送单元，用于：
    发送条件切换CHO配置信息，所述CHO配置信息包括源小区的测量配置信息。
  29. 根据权利要求28所述的装置，其特征在于，所述源小区的测量配置信息包括所述源小区的测量配置标识。
  30. 根据权利要求29所述的装置，其特征在于，所述源小区的测量配置标识包括所述源小区的测量标识、测量对象标识和上报配置标识中的至少一个。
  31. 根据权利要求28所述的装置，其特征在于，所述源小区的测量配置信息包括测量配置标识，所述测量配置标识与所述源小区的测量配置参数存在对应关系，并且，所述测量配置标识与CHO测量配置参数存在对应关系。
  32. 根据权利要求31所述的装置，其特征在于，所述CHO配置参数包括以下变量中的至少一个：
    CHO测量标识；CHO测量对象；CHO上报配置。
  33. 根据权利要求31或32所述的装置，其特征在于，所述测量配置信息还包括CHO测量配置参数修改信息，所述CHO测量配置参数修改信息用于终端设备修改所述测量配置标识对应的源小区的测量配置参数。
  34. 根据权利要求31至33中任一项所述的装置，其特征在于，所述测量配置信息还包括CHO测量配置参数增加信息，所述CHO测量配置参数增加信息用于终端设备增加所述测量配置标识对应的CHO测量配置参数。
  35. 根据权利要求31至34中任一项所述的装置，其特征在于，所述测量配置信息还包括CHO测量配置参数删除信息，所述CHO测量配置参数删除信息用于终端设备删除所述测量配置标识对应的CHO测量配置参数。
  36. 根据权利要求28至35中任一项所述的装置，其特征在于，所述CHO配置信息承载于无线资源控制RRC重配置消息中。
  37. 一种终端设备，其特征在于，包括：处理器和存储器，该存储器用于存储计算机程序，所述处理器用于调用并运行所述存储器中存储的计算机程序，执行如权利要求1至9中任一项所述的方法。
  38. 一种网络设备，其特征在于，包括：处理器和存储器，该存储器用于存储计算机程序，所述处理器用于调用并运行所述存储器中存储的计算机程序，执行如权利要求10至18中任一项所述的方法。
  39. 一种芯片，其特征在于，包括：处理器，用于从存储器中调用并运行计算机程序，使得安装有所述芯片的设备执行如权利要求1至9中任一项所述的方法。
  40. 一种芯片，其特征在于，包括：处理器，用于从存储器中调用并运行计算机程序，使得安装有所述芯片的设备执行如权利要求10至18中任一项所述的方法。
  41. 一种计算机可读存储介质，其特征在于，用于存储计算机程序，所述计算机程序使得计算机执行如权利要求1至9中任一项所述的方法。
  42. 一种计算机可读存储介质，其特征在于，用于存储计算机程序，所述计算机程序使得计算机执行如权利要求10至18中任一项所述的方法。
  43. 一种计算机程序产品，其特征在于，包括计算机程序指令，该计算机程序指令使得计算机执行如权利要求1至9中任一项所述的方法。
  44. 一种计算机程序产品，其特征在于，包括计算机程序指令，该计算机程序指令使得计算机执行如权利要求10至18中任一项所述的方法。
  45. 一种计算机程序，其特征在于，所述计算机程序使得计算机执行如权利要求1至9中任一项所述的方法。
  46. 一种计算机程序，其特征在于，所述计算机程序使得计算机执行如权利要求10至18中任一项所述的方法。
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