WO2021134522A1 - 用于切换的方法和装置 - Google Patents

用于切换的方法和装置 Download PDF

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Publication number
WO2021134522A1
WO2021134522A1 PCT/CN2019/130642 CN2019130642W WO2021134522A1 WO 2021134522 A1 WO2021134522 A1 WO 2021134522A1 CN 2019130642 W CN2019130642 W CN 2019130642W WO 2021134522 A1 WO2021134522 A1 WO 2021134522A1
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WO
WIPO (PCT)
Prior art keywords
cell
terminal device
cells
information
configuration information
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/CN2019/130642
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English (en)
French (fr)
Inventor
严乐
曾清海
张宏平
耿婷婷
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Huawei Technologies Co Ltd
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Huawei Technologies Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Huawei Technologies Co Ltd filed Critical Huawei Technologies Co Ltd
Priority to PCT/CN2019/130642 priority Critical patent/WO2021134522A1/zh
Priority to EP19958309.7A priority patent/EP4072196B1/en
Priority to CN201980103199.1A priority patent/CN114846844B/zh
Publication of WO2021134522A1 publication Critical patent/WO2021134522A1/zh
Priority to US17/855,269 priority patent/US12349011B2/en
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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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
    • H04W36/0055—Transmission or use of information for re-establishing the radio link
    • H04W36/0061—Transmission or use of information for re-establishing the radio link of neighbour cell information
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/0005—Control or signalling for completing the hand-off
    • H04W36/0083—Determination of parameters used for hand-off, e.g. generation or modification of neighbour cell lists
    • H04W36/00835—Determination of neighbour cell lists
    • 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
    • H04W36/24—Reselection being triggered by specific parameters
    • H04W36/32—Reselection being triggered by specific parameters by location or mobility data, e.g. speed data
    • H04W36/326—Reselection being triggered by specific parameters by location or mobility data, e.g. speed data by proximity to another entity
    • 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, and more specifically, to a method and device for handover.
  • the mobility management of the connected terminal device is controlled by the network device.
  • the traditional handover process includes the network device sending a handover message to the terminal device, the handover message instructs the terminal device to switch from the source cell to the target cell, specifically, the handover message may contain the identification information of the target cell (such as a physical cell identity) And resource information (such as random access resource information, etc.) required for handover to the target cell.
  • the terminal device accesses the target cell according to the handover message. Therefore, the successful transmission of the handover message is a necessary condition to ensure the success of the handover under the traditional handover mechanism.
  • This application provides a method and device for handover, in order to improve the handover success rate.
  • a method for handover is provided.
  • the method for handover may be executed by a terminal device, or may also be executed by a chip or circuit provided in the terminal device, which is not limited in this application.
  • execution by a terminal device can be taken as an example for description.
  • the method for handover includes:
  • the terminal device sends the path information of the terminal device to the network device, and the path information is used to determine the first cell; the terminal device receives the conditional handover CHO configuration information corresponding to the first cell from the network device; the terminal device according to the first cell The CHO configuration information corresponding to the cell determines the target cell.
  • the terminal device sends the path information for determining the first cell to the network device, and receives the CHO configuration information corresponding to the first cell from the network device, based on the first cell.
  • the CHO configuration information corresponding to the cell determines the target cell. Since the first cell is determined in combination with the above-mentioned path information, that is, the network device can provide the terminal device with a more suitable candidate cell, thereby improving the success rate of handover.
  • the CHO configuration information corresponding to the first cell is highly correlated; the method further includes: the terminal device determines the first cell based on the height at which the terminal device is located Corresponding CHO configuration information.
  • the above-mentioned CHO configuration information corresponding to the first cell may be height-related, and for different heights, it corresponds to the CHO configuration information corresponding to different first cells.
  • the network device can provide highly granular CHO configuration information corresponding to the first cell, so that the network device can flexibly and reasonably provide the CHO configuration information corresponding to the first cell to improve handover reliability.
  • the CHO configuration information corresponding to the first cell includes CHO execution conditions and at least one of the following information: the cell wireless network allocated by the first cell to the terminal device Temporary identification C-RNTI, resource information required for the terminal device to access the first cell, index information corresponding to the first cell, identification information of the first cell, or frequency information of the first cell.
  • the above-mentioned CHO configuration information corresponding to the first cell may include the CHO execution condition corresponding to the first cell and the information required for the terminal device to switch to the first cell, which provides the feasibility for the terminal device to implement handover.
  • the terminal device determines the target cell from the one or more second cells.
  • the terminal device may select a target cell from the at least one second cell as the cell to be handed over.
  • the terminal device determining the target cell from the plurality of second cells includes: the terminal device obtains the target cell from the source cell based on the distance change trend of the terminal device relative to the source cell The target cell is determined among a plurality of second cells.
  • the terminal device may change the distance from the at least one second cell based on the change trend of the distance between itself and the source cell. Select a target cell as the cell to be handed over to.
  • the terminal device determining the target cell from the plurality of second cells based on the change trend of the distance of the terminal device relative to the source cell includes: when the terminal device is relatively When the distance from the source cell becomes larger, the terminal device selects the cell furthest from the source cell from the multiple second cells as the target cell; or, when the distance from the terminal device to the source cell becomes smaller, the terminal device selects the cell furthest from the source cell as the target cell; The terminal device selects the cell closest to the source cell from the multiple second cells as the target cell.
  • the terminal device When the terminal device is far away from the source cell, the terminal device can select the cell furthest from the source cell as the target cell; when the terminal device is close to the source cell, the terminal device can select the cell closest to the source cell as the target cell.
  • the CHO configuration information corresponding to the first cell further includes distance information, and the distance information is used to indicate the distance between the first cell and the source cell.
  • the CHO configuration information corresponding to the first cell may carry distance information indicating the distance between the first cell and the source cell.
  • the terminal device determining the target cell from a plurality of second cells that meet the CHO execution condition includes: the terminal device is based on a signal quality change of the plurality of second cells Trend: Determine the target cell from the multiple second cells, where the signal quality change trend of the second cell includes the signal quality change trend of the second cell in the TTT corresponding to the second cell.
  • the terminal device may select one of the at least one second cell based on the change trend of the signal quality of the second cell
  • the target cell is the cell to be handed over.
  • the target cell is a cell whose signal quality change trend shows an upward trend among the plurality of second cells.
  • the terminal device can select a cell with an upward trend in quality as the target cell to ensure that a cell with a better signal quality is selected for handover.
  • the CHO configuration information corresponding to the first cell further includes a threshold value
  • the target cell is the signal quality change trend of the plurality of second cells showing an upward trend And the rate of change of signal quality is greater than or equal to a cell with the threshold value.
  • the CHO configuration information corresponding to the first cell sent by the network device can carry the threshold value. In this way, the terminal device can select the signal quality change when determining the target cell.
  • a cell with an upward trend and a rate of change of signal quality greater than or equal to the threshold is used as the target cell.
  • a method for handover is provided.
  • the method for handover can be executed by a network device, or can also be executed by a chip or circuit provided in the network device, which is not limited in this application.
  • execution by a network device can be used as an example for description.
  • the method for handover includes:
  • the network device receives the path information of the terminal device from the terminal device, where the path information is used to determine the first cell; the network device sends the conditional handover CHO configuration information corresponding to the first cell to the terminal device.
  • the terminal device sends the path information for determining the first cell to the network device, and receives the CHO configuration information corresponding to the first cell from the network device, based on the first cell.
  • the CHO configuration information corresponding to the cell determines the target cell. Since the first cell is determined in combination with the above-mentioned path information, that is, the network device can provide the terminal device with a more suitable candidate cell, thereby improving the success rate of handover.
  • the CHO configuration information corresponding to the first cell is highly related.
  • the above-mentioned CHO configuration information corresponding to the first cell may be height-related, and different heights correspond to different CHO configuration information corresponding to the first cell.
  • the network device can provide highly granular CHO configuration information corresponding to the first cell, so that the network device can flexibly and reasonably provide the CHO configuration information corresponding to the first cell to improve handover reliability.
  • the CHO configuration information corresponding to the first cell includes CHO execution conditions and at least one of the following information: the cell wireless network allocated by the first cell to the terminal device Temporary identification C-RNTI, resource information required for the terminal device to access the first cell, index information corresponding to the first cell, identification information of the first cell, or frequency information of the first cell.
  • the above-mentioned CHO configuration information corresponding to the first cell may include the CHO execution condition corresponding to the first cell and the information required for the terminal device to switch to the first cell, which provides the feasibility for the terminal device to implement handover.
  • the CHO configuration information corresponding to the first cell further includes distance information, and the distance information is used to indicate the distance between the first cell and the source cell.
  • the CHO configuration information corresponding to the first cell may carry distance information indicating the distance between the first cell and the source cell.
  • a method for handover is provided.
  • the method for handover may be executed by a terminal device, or may also be executed by a chip or circuit provided in the terminal device, which is not limited in this application.
  • execution by a terminal device can be taken as an example for description.
  • the method for handover includes:
  • the terminal device receives the conditional switching CHO configuration information corresponding to the first cell from the network device, and the terminal device switches the CHO configuration information according to the condition corresponding to the first cell, and determines that there are one or more CHO implementations in the first cell that satisfy the corresponding And determine the target cell from the one or more second cells based on the change trend of the distance of the terminal device relative to the source cell.
  • the terminal device can determine from the change trend of the distance between itself and the source cell. Select a target cell from the at least one second cell as the cell to be handed over.
  • the terminal device determines the target cell from the plurality of second cells based on the change trend of the distance of the terminal device relative to the source cell, including: When the distance from the source cell becomes larger, the terminal device selects the cell that is the farthest from the source cell from the multiple second cells as the target cell; or, when the distance from the terminal device to the source cell becomes smaller, the terminal device selects the cell furthest from the source cell as the target cell; The terminal device selects the cell closest to the source cell from the multiple second cells as the target cell.
  • the terminal device can select the cell that is the farthest from the source cell from the candidate cells that meet the CHO execution conditions as the target cell; in the case that the terminal device is close to the source cell, the terminal device can select the cell that satisfies the CHO Select the cell closest to the source cell from the candidate cells that perform the condition as the target cell.
  • the CHO configuration information corresponding to the first cell further includes distance information, and the distance information is used to indicate the distance between the first cell and the source cell.
  • the CHO configuration information corresponding to the first cell may carry distance information indicating the distance between the first cell and the source cell.
  • a method for handover is provided.
  • the method for handover may be executed by a terminal device, or may also be executed by a chip or a circuit provided in the terminal device, which is not limited in this application.
  • execution by a terminal device can be taken as an example for description.
  • the method for handover includes:
  • the terminal device receives the conditional switching CHO configuration information corresponding to the first cell from the network device; the terminal device switches the CHO configuration information according to the condition corresponding to the first cell, and determines that there are one or more satisfying CHO executions in the first cell Conditional second cell, the terminal device determines the target cell from the one or more second cells based on the signal quality change trend of the one or more second cells, where the signal quality change trend of the second cell includes the first cell The change trend of the signal quality of the second cell in the TTT corresponding to the second cell.
  • the terminal device may determine the signal quality change trend of the second cell from the at least one Select a target cell from the second cell as the cell to be handed over.
  • the target cell is the signal quality change trend of the multiple second cells A community that is on the rise.
  • the terminal device can select a cell with an increasing trend in quality as the target cell to ensure that a cell with better signal quality is selected for handover.
  • the CHO configuration information corresponding to the first cell further includes a threshold value
  • the target cell is the signal quality change trend of the plurality of second cells showing an upward trend And the rate of change of signal quality is greater than or equal to a cell with the threshold value.
  • the threshold value can be carried in the CHO configuration information corresponding to the first cell, and the signal quality change trend is upward and the signal quality change rate is greater than or equal to the threshold value.
  • the cell is the target cell.
  • a device for handover includes a processor for implementing the functions of the terminal device in the methods described in the first, third, and fourth aspects.
  • the device for handover may further include a memory coupled with the processor, and the processor is configured to implement the functions of the terminal device in the methods described in the first, third, and fourth aspects.
  • the memory is used to store program instructions and data.
  • the memory is coupled with the processor, and the processor can call and execute the program instructions stored in the memory to implement the functions of the terminal device in the methods described in the first aspect, the third aspect, and the fourth aspect.
  • the device for switching may further include a communication interface, and the communication interface is used for the device for switching to communicate with other devices.
  • the transceiver may be a communication interface or an input/output interface.
  • the device for handover includes: a processor and a communication interface, which are used to implement the functions of the terminal device in the methods described in the first, third, and fourth aspects, and specifically include:
  • the processor uses the communication interface to communicate with the outside;
  • the processor is used to run a computer program, so that the device implements any one of the methods described in the first, third, and fourth aspects.
  • the exterior may be an object other than the processor, or an object other than the device.
  • the communication interface may be an input/output interface, interface circuit, output circuit, input circuit, pin or pin on the chip or chip system.
  • the processor can also be embodied as a processing circuit or a logic circuit.
  • a device for handover includes a processor for implementing the function of the network device in the method described in the second aspect.
  • the device for handover may further include a memory coupled with the processor, and the processor is configured to implement the function of the network device in the method described in the second aspect.
  • the memory is used to store program instructions and data.
  • the memory is coupled with the processor, and the processor can call and execute the program instructions stored in the memory to implement the function of the network device in the method described in the second aspect.
  • the device for switching may further include a communication interface, and the communication interface is used for the device for switching to communicate with other devices.
  • the communication interface is a transceiver, an input/output interface, or a circuit.
  • the device for handover includes: a processor and a communication interface, used to implement the function of the network device in the method described in the second aspect, specifically including:
  • the processor uses the communication interface to communicate with the outside;
  • the processor is used to run a computer program, so that the device implements any of the methods described in the second aspect.
  • the exterior may be an object other than the processor, or an object other than the device.
  • the device for switching is a chip or a chip system.
  • the communication interface may be an input/output interface, interface circuit, output circuit, input circuit, pin or related circuit on the chip or chip system.
  • the processor can also be embodied as a processing circuit or a logic circuit.
  • a computer-readable storage medium on which a computer program is stored.
  • the communication device realizes the first aspect, the third aspect, the fourth aspect, and the first aspect, A method in any possible implementation manner of the third aspect and the fourth aspect.
  • a computer-readable storage medium on which a computer program is stored.
  • the communication device realizes the second aspect and any of the possible implementation manners of the second aspect method.
  • a computer program product containing instructions which when executed by a computer, enables a communication device to implement any one of the first, third, and fourth aspects, as well as the first, third, and fourth aspects Methods in possible implementations.
  • a computer program product containing instructions which when executed by a computer, causes a communication device to implement the second aspect and the method in any possible implementation manner of the second aspect.
  • a communication system including the device for handover shown in the fifth aspect and the device for handover shown in the sixth aspect.
  • FIG. 1 is a schematic diagram of a system 100 that can apply the method for handover according to the embodiment of the present application.
  • Fig. 2 is a schematic diagram of a CHO mechanism provided by an embodiment of the present application.
  • Fig. 3 is a schematic diagram of a cell detected by a drone according to an embodiment of the present application.
  • FIG. 4 is a schematic flowchart of a method for handover provided by an embodiment of the present application.
  • FIG. 5 is a schematic diagram of a device 500 for handover provided in the present application.
  • FIG. 6 is a schematic structural diagram of a terminal device 600 applicable to an embodiment of the present application.
  • FIG. 7 is a schematic diagram of an apparatus 700 for handover provided by the present application.
  • FIG. 8 is a schematic structural diagram of a network device 800 applicable to an embodiment of the present application.
  • LTE long term evolution
  • FDD frequency division duplex
  • UMTS time division duplex
  • WiMAX worldwide interoperability for microwave access
  • 5G fifth generation
  • NSA non-standalone
  • SA standalone
  • SA 5G mobile communication system
  • the communication system can also be a public land mobile network (PLMN) network, a device-to-device (D2D) communication system, a machine-to-machine (M2M) communication system, and a device-to-device (D2D) communication system.
  • PLMN public land mobile network
  • D2D device-to-device
  • M2M machine-to-machine
  • D2D device-to-device
  • IoT Internet of things
  • the terminal equipment (terminal equipment) in the embodiments of the present application may refer to an access terminal, a user unit, a user station, a mobile station, a mobile station, a relay station, a remote station, a remote terminal, a mobile device, a user terminal, and a user equipment.
  • UE user equipment
  • terminal terminal
  • wireless communication equipment user agent, or user device.
  • the terminal equipment can also be a cellular phone, a cordless phone, a session initiation protocol (session initiation protocol, SIP) phone, a wireless local loop (WLL) station, a personal digital assistant (personal digital assistant, PDA), with wireless communication Functional handheld devices, computing devices, or other processing devices connected to wireless modems, in-vehicle devices, wearable devices, terminal devices in 5G networks, or terminals in the public land mobile network (PLMN) that will evolve in the future Devices or terminal devices in the future Internet of Vehicles, etc., which are not limited in the embodiment of the present application.
  • PLMN public land mobile network
  • wearable devices can also be referred to as wearable smart devices. It is a general term for using wearable technology to intelligently design daily wear and develop wearable devices, such as glasses, Gloves, watches, clothing and shoes, etc.
  • a wearable device is a portable device that is directly worn on the body or integrated into the user's clothes or accessories. Wearable devices are not only a kind of hardware device, but also realize powerful functions through software support, data interaction, and cloud interaction.
  • wearable smart devices include full-featured, large-sized, complete or partial functions that can be achieved without relying on smart phones, such as smart watches or smart glasses, and only focus on a certain type of application function, and need to cooperate with other devices such as smart phones.
  • the terminal device can also be a terminal device in the IoT system.
  • IoT is an important part of the development of information technology in the future. Its main technical feature is to connect objects to the network through communication technology to realize man-machine Interconnection, an intelligent network of interconnection of things.
  • the IOT technology can achieve massive connections, deep coverage, and power saving of the terminal through, for example, narrowband (NB) technology.
  • NB narrowband
  • the terminal equipment may also include sensors such as smart printers, train detectors, gas stations, etc.
  • the main functions include collecting data (part of the terminal equipment), receiving control information and downlink data from network equipment, and sending electromagnetic waves. , To transmit uplink data to network equipment.
  • the network device in the embodiment of the present application may be any communication device with a wireless transceiving function that is used to communicate with a terminal device.
  • This equipment includes but is not limited to: evolved Node B (eNB), radio network controller (RNC), Node B (NB), base station controller (BSC) , Base transceiver station (base transceiver station, BTS), home base station (home evolved NodeB, HeNB, or home Node B, HNB), baseband unit (BBU), wireless fidelity (wireless fidelity, WIFI) system Access point (AP), wireless relay node, wireless backhaul node, transmission point (TP), or transmission and reception point (TRP), etc., can also be a 5G system, such as, The gNB in the NR system, or the transmission point (TRP or TP), one or a group of antenna panels (including multiple antenna panels) of the base station in the 5G system, or the network node that constitutes the gNB or transmission point, Such as baseband unit (BBU), or distributed unit
  • the network device in the embodiment of the present application may refer to a centralized unit (CU) or a distributed unit (DU), or the network device includes a CU and a DU.
  • the gNB may also include an active antenna unit (AAU).
  • the CU implements part of the functions of gNB, and the DU implements part of the functions of gNB.
  • the CU is responsible for processing non-real-time protocols and services, and implements radio resource control (radio resource control, RRC) and packet data convergence protocol (packet data convergence protocol, PDCP) layer functions.
  • RRC radio resource control
  • PDCP packet data convergence protocol
  • the DU is responsible for processing the physical layer protocol and real-time services, and realizes the functions of the radio link control (RLC) layer, the media access control (MAC) layer, and the physical (PHY) layer.
  • AAU realizes some physical layer processing functions, radio frequency processing and related functions of active antennas. Since the information of the RRC layer will eventually become the information of the PHY layer, or be transformed from the information of the PHY layer, under this architecture, high-level signaling, such as RRC layer signaling, can also be considered to be sent by the DU , Or, sent by DU+AAU.
  • the network device may be a device including one or more of the CU node, the DU node, and the AAU node.
  • the CU can be divided into network equipment in an access network (radio access network, RAN), and the CU can also be divided into network equipment in a core network (core network, CN), which is not limited in this application.
  • the CU can also be divided into the central unit of the control plane (CU-CP) and the central unit of the user plane (CU-UP).
  • CU-CP and CU-UP can also be deployed on different physical devices.
  • CU-CP is responsible for the control plane function and mainly includes the RRC layer and the PDCP-C layer.
  • the PDCP-C layer is mainly responsible for encryption and decryption of control plane data, integrity protection, and data transmission.
  • CU-UP is responsible for the user plane function, mainly including SDAP layer and PDCP-U layer.
  • the SDAP layer is mainly responsible for processing the data of the core network and mapping the flow to the bearer.
  • the PDCP-U layer is mainly responsible for at least one function such as encryption and decryption of the data plane, integrity protection, header compression, serial number maintenance, and data transmission.
  • the CU-CP and the CU-UP are connected through a communication interface (for example, an E1 interface).
  • CU-CP represents that a network device is connected to a core network device through a communication interface (for example, Ng interface), and is connected to a DU through a communication interface (for example, F1-C (control plane) interface).
  • the CU-UP is connected to the DU through a communication interface (for example, an F1-U (user plane) interface).
  • the PDCP-C layer is also included in the CU-UP.
  • the network device mentioned in the embodiment of this application may be a device including CU, or DU, or CU and DU, or control plane CU node (CU-CP node) and user plane CU node (CU-UP node), and DU The device of the node.
  • CU-CP node control plane CU node
  • CU-UP node user plane CU node
  • Network equipment and terminal equipment can be deployed on land, including indoor or outdoor, handheld or vehicle-mounted; they can also be deployed on water; they can also be deployed on airborne aircraft, balloons, and satellites.
  • the scenes in which the network equipment and the terminal equipment are located are not limited.
  • the terminal device or the network device includes a hardware layer, an operating system layer running on the hardware layer, and an application layer running on the operating system layer.
  • the hardware layer includes hardware such as a central processing unit (CPU), a memory management unit (MMU), and memory (also referred to as main memory).
  • the operating system can be any one or more computer operating systems that implement business processing through processes, for example, Linux operating systems, Unix operating systems, Android operating systems, iOS operating systems, or windows operating systems.
  • the application layer includes applications such as browsers, address books, word processing software, and instant messaging software.
  • various aspects or features of the present application can be implemented as methods, devices, or products using standard programming and/or engineering techniques.
  • article of manufacture used in this application encompasses a computer program accessible from any computer-readable device, carrier, or medium.
  • computer-readable media may include, but are not limited to: magnetic storage devices (for example, hard disks, floppy disks, or tapes, etc.), optical disks (for example, compact discs (CD), digital versatile discs (DVD)) Etc.), smart cards and flash memory devices (for example, erasable programmable read-only memory (EPROM), cards, sticks or key drives, etc.).
  • various storage media described herein may represent one or more devices and/or other machine-readable media for storing information.
  • the term "machine-readable storage medium” may include, but is not limited to, wireless channels and various other media capable of storing, containing, and/or carrying instructions and/or data.
  • FIG. 1 is a schematic diagram of a communication system 100 applicable to a method for handover according to an embodiment of the present application.
  • the communication system 100 may include at least one network device, such as the network device 110 shown in FIG. 1; the communication system 100 may also include at least one terminal device, such as the terminal device 120 shown in FIG. 1.
  • the network device 110 and the terminal device 120 may communicate through a wireless link.
  • Each communication device, such as the network device 110 or the terminal device 120 can be equipped with multiple antennas.
  • the configured multiple antennas may include at least one transmitting antenna for transmitting signals and at least one receiving antenna for receiving signals. Therefore, the communication devices in the communication system 100, such as the network device 110 and the terminal device 120, can communicate through multi-antenna technology.
  • FIG. 1 is only a simplified schematic diagram of an example for ease of understanding.
  • the communication system 100 may also include other network devices or other terminal devices, which are not shown in FIG. 1.
  • the mobility management of the connected terminal device is controlled by the network device, that is, the network device instructs the terminal device to switch by sending a handover message.
  • the source network device sends a handover message to the terminal device to control the terminal device to switch from the source cell to the target cell.
  • the aforementioned handover message may be a radio resource control (RRC) message.
  • RRC radio resource control
  • the RRC message in the NR system may be an RRC reconfiguration message carrying a reconfiguration with sync (reconfiguration with sync) message; in the LTE system, this
  • the RRC message may be an RRC connection reconfiguration message carrying a mobility control information element (mobility control info).
  • the aforementioned handover message includes related information of the target cell and related configuration parameters required by the terminal device to access the target cell.
  • the information of the target cell can be the physical cell identifier (PCI) of the target cell, the cell global identifier (CGI) of the target cell, the frequency information corresponding to the target cell, or the target cell is allocated to the terminal device
  • the cell radio network temporary identifier (C-RNTI) the frequency information corresponding to the target cell may include one or more of the following: the absolute frequency of the synchronization signal (synchronization signal block, SSB) (for example, absoluteFrequencySS) , Reference resource module (common RB0) absolute frequency position (for example, absoluteFrequencyPointA), frequency bandwidth list (for example, frequencyBandList), subcarrier spacing (subcarrier spacing, SCS) specific carrier list (for example, scs-SpecificCarrierList), etc.;
  • SSB synchronization signal block
  • SSB for example, absoluteFrequencySS
  • the relevant configuration parameters required by the terminal device to access the target cell may include random access channel (RACH) resource information (for example, dedicated RACH resources and/or public RACH resources, etc.) required to access the target cell.
  • RACH random access channel
  • the terminal device can access the target cell according to the information contained in the handover message. It can be seen that the successful transmission of the handover message is a necessary condition to ensure the successful handover of the terminal device under the traditional handover mechanism. However, in the LTE system or NR system, the rapid attenuation of channel quality, the rapid movement of terminal equipment and the obstruction of objects, or the long duration of measurement and handover preparation, etc. will cause the handover message to fail to send, which will lead to handover failure and degradation. Handover success rate.
  • the handover method using the conditional handover mechanism can improve the handover success rate, as shown in FIG. 2, which is a schematic diagram of a CHO method provided by an embodiment of the present application.
  • the executive body mainly includes terminal equipment and network equipment.
  • the CHO method includes at least some of the following steps.
  • the source network device sends CHO configuration information to the terminal device.
  • the source network device sends an RRC message (such as an RRC reconfiguration message) to the terminal device when the quality of the radio link between the source cell and the terminal device (for example, it may be referred to as the source link) is good, and the RRC message It may include CHO configuration information corresponding to at least one candidate cell, and the CHO configuration information may include CHO trigger condition (also referred to as execution condition) information and candidate cell information.
  • RRC message such as an RRC reconfiguration message
  • the terminal device when the quality of the radio link between the source cell and the terminal device (for example, it may be referred to as the source link) is good
  • the RRC message It may include CHO configuration information corresponding to at least one candidate cell, and the CHO configuration information may include CHO trigger condition (also referred to as execution condition) information and candidate cell information.
  • the information of the candidate cell may include at least one of the following: C-RNTI allocated by the candidate cell to the terminal device, RACH resource information required to access the candidate cell, CGI of the candidate cell, PCI of the candidate cell, and frequency information corresponding to the candidate cell; CHO execution condition information can include CHO execution event type and corresponding parameters (such as CHO execution threshold, trigger time, hysteresis value, etc.), CHO execution event type can include event B1, event B2, event A3, event A4, event A5 or other event types, etc.
  • the CHO execution conditions corresponding to different candidate cells may be the same or different, which is not limited in this application.
  • the terminal device After receiving the RRC message containing the CHO configuration information, the terminal device determines whether at least one candidate cell satisfies the CHO execution condition according to the CHO configuration information, and takes a candidate cell that meets the CHO execution condition as the target cell, as shown in Figure 2.
  • the method flow also includes S220, the terminal device determines the target cell.
  • the terminal device After the terminal device determines the target cell, the terminal device can perform a random access process with the determined target cell. That is, the method process shown in FIG. 2 further includes S230, where the terminal device initiates random access.
  • the terminal device When the random access is successfully completed, the terminal device sends an RRC message (for example, RRC reconfiguration complete message) to the network device to which the target cell belongs (that is, the target network device, such as candidate network device #1 in Figure 2) to notify the target network device
  • RRC message for example, RRC reconfiguration complete message
  • the conditional switching is completed, that is, the method flow shown in FIG. 2 further includes S240.
  • the terminal device sends an RRC message to the candidate network device #1 (that is, the target network device).
  • the aforementioned random access procedure S230 may be skipped and not executed.
  • the RRC message containing the CHO configuration information contains the RACH-less information corresponding to at least one candidate cell (such as TA information, UL grant information, etc.)
  • the RACH process can be skipped and not executed, that is, after the terminal device determines the target cell, it can directly send the RRC reconfiguration complete message to the target network device.
  • the source network device will send an RRC reconfiguration message to the terminal device.
  • the RRC reconfiguration message includes measurement configuration information and instructs the terminal device to measure the quality of the neighboring cell.
  • the measurement result is reported to the source network device, and the source network device sends a request message (for example, the request message may be a handover request message) to at least one candidate network device (that is, the network device to which the candidate cell belongs), and the request message is used to request the candidate
  • the network device prepares for the CHO process (for example, prepares/configures the above-mentioned "candidate cell information"), and can receive a response message from the candidate network device (for example, the response message can be a handover request response message), as shown in Figure 2
  • the process of the method also includes six steps S211 to S216 as shown in FIG.
  • the source network device and the candidate network device can be the same network device or different network devices. If the source network device and the candidate network device are the same network device, the source network device and the candidate network device need not be connected. Signaling interaction. For example, if the source network device and candidate network device #1 are the same network device, S213 and S214 can be omitted. This is just an example, not limited to this.
  • the source network device since the source network device sends the CHO configuration information to the terminal device when the source link communication quality is good, the success rate of sending the CHO configuration information is guaranteed, thereby increasing the success rate of the handover.
  • the terminal device after receiving the CHO configuration information, the terminal device needs to determine the target cell. Specifically, in the CHO mechanism, the source network device can configure one or more candidate cells. After the terminal device receives the CHO configuration information, it judges whether the CHO execution condition is satisfied.
  • the configured CHO execution event type is A3 event
  • the configured corresponding threshold is the first threshold (for example, offset (offset) dB)
  • the corresponding candidate cell B is configured, if the configured CHO execution event type is the A5 event, and the configured corresponding thresholds are the second threshold and the third threshold, then when the cell of candidate cell B is When the signal quality is higher than the second threshold and the cell signal quality of the serving cell is lower than the third threshold, it can be considered that the candidate cell B meets the CHO execution condition, and the candidate cell B can be determined as the target cell.
  • the TTT may be cell-granular, that is, the TTTs corresponding to different candidate cells may be the same or different.
  • the CHO configuration information may include one or For multiple TTTs, candidate cells and TTTs may have a one-to-one, or many-to-one, or one-to-many correspondence relationship, and the TTT corresponding to each candidate cell may be the same or different, which is not limited in this application.
  • the terminal device can determine the candidate The cell meets the CHO execution conditions.
  • the terminal device can select a cell from the multiple candidate cells that meet the CHO execution conditions as the target cell according to a certain rule, for example, The cell with the highest signal quality among the multiple candidate cells for CHO execution conditions is determined as the target cell, or the cell with the highest priority (for example, the highest frequency priority) among multiple candidate cells that meet the CHO execution conditions is determined as the target cell.
  • the cell, or multiple candidate cells that meet the CHO execution conditions have the most excellent beams (a good beam means that the signal quality of the beam is higher than a predetermined threshold, and the predetermined threshold can be carried in the RRC containing the CHO configuration information. In the message, or agreed in the agreement, this application does not limit this)
  • the cell is determined as the target cell, or any one of the multiple candidate cells that meet the CHO execution conditions is determined as the target cell, or by other means Determine the target cell.
  • the mobile communication system is mainly designed for ground terminal equipment at the beginning of the design.
  • the height of the terminal equipment is higher than the base station, problems of increased interference and frequent handover will occur.
  • the terminal device as an aerial UE as an example, when the flying height of the drone is higher than the base station, the following problems will arise when the drone is connected to the network for communication:
  • the radiation direction of the base station signal is mainly toward the ground. Although there will be reflection or scattering of the ground signal, some of the signal will spread into the air, or the base station antenna will also have some side lobes radiating into the air, but in general, the UAV The received signal strength will be lower.
  • the above-mentioned CHO mechanism can improve the success rate and reliability of the drone handover.
  • the application of the CHO mechanism in the mobile scene of the drone can depend on the flight path of the drone. The following briefly introduces the reporting of the flight path of the drone involved in this application.
  • the network device can send a terminal equipment information request (UEInformationRequest) message to the drone, which is used to request the drone to report flight path information.
  • UEInformationRequest terminal equipment information request
  • the request message may include the maximum number of waypoints/coordinate points (such as N) that the drone can report, and whether it is necessary to report timestamp information.
  • the drone replies to the network device with a UEInformation Response (UEInformationResponse) message.
  • the response message may contain the location information of one or more waypoints/coordinate points (for example, the location information may include longitude information). , Latitude information, altitude information), and the corresponding time stamp information when the drone passes through each waypoint/coordinate point (for example, the time stamp information may include absolute time information or relative time information).
  • the time stamp information may also be reported according to whether the time stamp information needs to be reported in the request message. If the time stamp information does not need to be reported in the request message, it may not be reported.
  • FIG. 3 is a schematic diagram of a cell detected by a drone according to an embodiment of the present application. It can be seen from Figure 3 that when the height of the drone is H1, the cells that can be detected are (cell#1, cell#2, cell#3, cell#4, and cell#5); When the height of the man-machine is H2, the cells that can be detected are (cell#1, cell#3, cell#5).
  • the method for handover provided in this application can adopt the CHO mechanism in the drone scenario, and improve the success rate of the drone for cell handover.
  • the method for handover provided in the embodiment of the present application is not limited to the drone scene.
  • used to indicate can include both used for direct indication and used for indirect indication.
  • the indication information can directly indicate A or indirectly indicate A, but it does not mean that A must be included in the indication information.
  • the information indicated by the instruction information is referred to as the information to be instructed.
  • the information to be indicated may be directly indicated, such as the information to be indicated itself or the index of the information to be indicated.
  • the information to be indicated can also be indicated indirectly by indicating other information, where there is an association relationship between the other information and the information to be indicated. It is also possible to indicate only a part of the information to be indicated, while other parts of the information to be indicated are known or agreed in advance. For example, it is also possible to realize the indication of specific information by means of a pre-arranged order (for example, stipulated in an agreement) of various information, so as to reduce the indication overhead to a certain extent. At the same time, it can also identify the common parts of each information and give unified instructions, so as to reduce the instruction overhead caused by separately indicating the same information.
  • preset may include indication by network device signaling, or pre-defined, for example, protocol definition.
  • pre-defined can be implemented by pre-saving corresponding codes, tables or other methods that can be used to indicate related information in the equipment (for example, including terminal equipment and network equipment). This application does not make any specific implementation methods. limited.
  • the "saving" referred to in the embodiments of the present application may refer to storing in one or more memories.
  • the one or more memories may be provided separately, or integrated in an encoder or decoder, a processor, or a communication device.
  • the one or more memories may also be partly provided separately, and partly integrated in a decoder, a processor, or a communication device.
  • the type of the memory can be any form of storage medium, which is not limited in this application.
  • the “protocols” involved in the embodiments of the present application may refer to standard protocols in the communication field, for example, may include LTE protocol, NR protocol, and related protocols applied to future communication systems, which are not limited in this application.
  • the method for handover may be applied to a system that communicates through a multi-antenna technology, for example, the communication system 100 shown in FIG. 1.
  • the communication system may include at least one network device and at least one terminal device.
  • Multi-antenna technology can be used to communicate between network equipment and terminal equipment.
  • the embodiments shown below do not specifically limit the specific structure of the execution body of the method provided by the embodiments of the present application, as long as the program that records the code of the method provided by the embodiments of the present application can be executed according to the present application.
  • the method provided in the application embodiment only needs to communicate.
  • the execution subject of the method provided in the embodiment of the application may be a terminal device or a network device, or a functional module in the terminal device or the network device that can call and execute the program.
  • the interaction between the network device and the terminal device is taken as an example to describe in detail the method for handover provided in the embodiment of the present application.
  • FIG. 4 is a schematic flowchart of a method for handover provided by an embodiment of the present application.
  • the execution subject in this flowchart includes terminal equipment and network equipment.
  • the method for handover includes at least some of the following steps.
  • the terminal device sends path information to the network device.
  • the network device may be the source network device.
  • the terminal device sending path information to the network device may be: the terminal device receives the UEInformationRequest message sent by the network device, and the UEInformationRequest is used to request the terminal device to report path information; the terminal device replies to the network device from the terminal device An information response (UEInformationResponse) message, where the response message includes path information of the terminal device.
  • the terminal device sending path information to the network device may be: the terminal device actively reports the path information to the network device periodically.
  • the terminal device sending path information to the network device may be: the terminal device reports its own path information to the network device when it enters the connected state, for example, including itself in the RRC establishment request message or the RRC establishment completion message The path information.
  • the terminal device sending path information to the network device may be: after receiving the RRC message containing the measurement configuration information sent by the network device, the terminal device reports its own path information to the network device.
  • the terminal device sending path information to the network device may be: the terminal device randomly reports its own path information to the network device.
  • the terminal device can use the UEInformationResponse message, or the RRC establishment complete message, or the RRC reconfiguration complete message, or the RRC reestablishment complete message, or the RRC recovery complete message, or other information for sending path information. Let, transmit path information between the terminal device and the network device.
  • the path information of the terminal device in the embodiment of the present application may also be referred to as the route information of the terminal device.
  • the specific name of the path information sent by the terminal device to the network device is not limited, but the path information of the terminal device is functionally limited to indicate the location where the terminal device is already located, about to be located, or where it is currently located. The coordinates of the location.
  • the path information reported by the drone can refer to the provisions in the current protocol.
  • An example is that the drone receives the UEInformationRequest message sent by the network device, and then replies to the network device with a UEInformationResponse message.
  • the response message can include multiple coordinate points. Position information, and/or the horizontal flight speed of the drone, and/or the vertical flight speed of the drone.
  • the path information may include location information of a coordinate point, for example, longitude information, latitude information, altitude information, etc.; the path information may also include timestamp information corresponding to the terminal device at the coordinate point, and the timestamp information may include Absolute time information and/or relative time, for example, Beijing time, coordinated universal time (UTC), or European time, or other times, this application does not limit this.
  • location information of a coordinate point for example, longitude information, latitude information, altitude information, etc.
  • the path information may also include timestamp information corresponding to the terminal device at the coordinate point, and the timestamp information may include Absolute time information and/or relative time, for example, Beijing time, coordinated universal time (UTC), or European time, or other times, this application does not limit this.
  • UTC coordinated universal time
  • the network device sends the CHO configuration information corresponding to the first cell to the terminal device.
  • the network device can convert the path information into cell information based on the path information and actual network deployment conditions, and determine at least one third cell based on the cell information.
  • the network device learns the path information described above it can read the path information from local storage (for example, after the network device obtains the path information in S410, the information is stored locally, and if the path information needs to be used, the path information is stored locally. It can be directly read in), or it can also request the terminal device to report the path information when the path information is needed.
  • the network device can convert the three-dimensional location information corresponding to the coordinate points in the path information into cell-related information (such as PCI, frequency point information, CGI or ECGI, etc.), based on the cell-related information obtained by the conversion.
  • the information network device can determine at least one third cell.
  • the conversion of the three-dimensional position information corresponding to the coordinate point into the cell-related information may be related to determining the cell that may exist near the coordinate point according to the three-dimensional position information corresponding to the coordinate point.
  • the source network device may use all or part of the at least one third cell as the fourth cell, and the fourth cell may include one or more cells.
  • the first cell (or the first cell) may be obtained from the fourth cell.
  • CHO configuration information corresponding to a cell where the first cell may include one or more cells, and the first cell may also be referred to as a candidate cell. Then, the source network device may send the CHO configuration information corresponding to the first cell to the terminal device.
  • first cells there may be multiple first cells, that is, there are multiple third cells that can be determined by the source network device based on the received path information and actual network deployment conditions, and the source network device can determine the number of third cells in the third cell. Part or all of the cells are used as the fourth cell (for example, there can be multiple fourth cells), and after preparing for handover with the fourth cell, one or more first cells can be determined, and the at least one first cell can be sent to the terminal device. CHO configuration information corresponding to the cell.
  • the source network device determines N third cells based on the path information reported by the terminal device and the actual network deployment situation, and uses P cells among the N third cells as the fourth cell.
  • the M cells among the P cells are used as the first cell, where N, P, and M are positive integers, M is less than or equal to P, and P is less than or equal to N.
  • the CHO configuration information corresponding to the aforementioned first cell may be included in an RRC message and sent to the terminal device.
  • the RRC message may be a newly defined RRC message, or it may reuse the RRC message specified in the current protocol, which is not limited in the embodiment of the present application.
  • the RRC message in the NR system may be an RRC reconfiguration message; the RRC message in the LTE system may be an RRC connection reconfiguration message.
  • the above-mentioned CHO configuration information corresponding to the first cell may be included in other newly added or existing signaling and sent to the terminal device.
  • the CHO configuration information corresponding to the first cell includes CHO execution condition information.
  • CHO execution condition information can also be called CHO trigger condition information.
  • CHO execution condition information can include CHO trigger event type and corresponding parameters (such as TTT, threshold, hysteresis value, etc.), CHO trigger event type can include event B1, event B2, event A3, event A4, event A5 or other trigger event types, etc.
  • the CHO execution conditions corresponding to different first cells may be the same or different. Refer to the description of the CHO execution conditions in the current agreement, which is not limited in this application.
  • the CHO configuration information corresponding to the first cell may also include at least one of the following: C-RNTI allocated by the first cell to the terminal device, resource information required for the terminal device to access the first cell, index information corresponding to the first cell, Identification information of the first cell, frequency information of the first cell, physical layer configuration parameters corresponding to the first cell, MAC layer configuration parameters, RLC layer configuration parameters, PDCP layer configuration parameters, SDAP layer configuration parameters, or RRC layer configuration Parameters, etc.
  • the index information corresponding to the first cell may be a measurement identifier and/or a conditional handover configuration identifier (CHO-ConfigId).
  • the identification information of the first cell may be a physical cell identifier (PCI) or a cell global identifier (CGI) or an E-UTRAN cell global identifier (ECGI).
  • the C-RNTI allocated by the first cell to the terminal device includes multiple C-RNTIs allocated by the first cell to the terminal device, and the identity allocated by the first cell to the terminal device includes the identity allocated by the multiple first cells to the terminal device.
  • the resource information required by the terminal device to access the first cell includes the resource information required for the terminal device to access multiple first cells (or can be understood as the multiple first cells respectively allocated for the terminal device to access the information required for it. Resource information).
  • the specific information content included in the CHO configuration information corresponding to the first cell is not limited to the provisions of the current protocol.
  • the CHO configuration information corresponding to the first cell includes the CHO configuration information corresponding to the multiple first cells, and the CHO configuration information corresponding to the multiple first cells can be sent through a message Send to the terminal device, or send to the terminal device through multiple messages.
  • different heights or height intervals correspond to different first cells.
  • the height may be the height of the terminal device relative to the ground, or the height may be the height of the terminal device relative to sea level, or the height may be the height of the terminal device relative to a certain reference point, which is not limited in this application.
  • the network device may also combine the path information to determine one or more first cells corresponding to different heights (or height intervals).
  • the first cell is a collective term, and there may be multiple cells called the first cell, and different heights or height intervals corresponding to different first cells can be understood as different heights or height intervals corresponding to completely different cells; or, It can also be understood that the cells corresponding to different heights or height intervals are not completely the same. For example, some of the first cells corresponding to different heights or height intervals are the same, and some of the cells are different. In this case, it is also called The first cells corresponding to different heights or height intervals are different.
  • the CHO configuration information corresponding to the first cell is highly related, for example, the CHO configuration information corresponding to the first cell is highly granular or interval granular. That is, for different heights (or height intervals), the network can provide different CHO configuration information (for example, providing multiple heights corresponding to multiple CHO configuration information corresponding to the first cell). At this time, for different heights or One or more first cells configured in the height interval may be all different, or some of the same and some different, and for different heights or height intervals, even if some of the multiple first cells are the same, these same cells
  • the corresponding CHO configuration information can also be the same or different, which is not limited in this application.
  • the CHO configuration information corresponding to the multiple different first cells may be included in an RRC message, and the RRC message may also include height thresholds (such as H1, H2) or height interval information (such as [H3, H4], [ H5, H6]), and there is a correspondence between the height threshold (or height interval) and the CHO configuration information corresponding to multiple different first cells.
  • height thresholds such as H1, H2
  • height interval information such as [H3, H4], [ H5, H6]
  • the RRC message sent by the network device to the terminal device contains H1, H2, and CHO configuration information config#1 corresponding to the first cell (for example, config#1 contains config#1a corresponding to cell#2, and CHO configuration information corresponding to cell#4.
  • config#1b the CHO configuration information config#2 corresponding to the first cell
  • config#2 contains config#2a corresponding to cell#1, config#2b corresponding to cell#2, config#2c corresponding to cell#3 , Config#2d corresponding to cell#4, config#2e corresponding to cell#5
  • CHO configuration information config#3 corresponding to the first cell for example, config#3 contains config#3a, cell# corresponding to cell#1 3 corresponding config#3b, cell#5 corresponding config#3c
  • the CHO configuration information config#1 corresponding to the first cell corresponds to a height lower than H1
  • the CHO configuration information config#2 corresponding to the first cell corresponds to The height is higher than or equal to H1 and lower than or equal to H2, and the CHO configuration information config#3 corresponding to the first cell corresponds to the height higher than H2.
  • the terminal device After the terminal device receives the above RRC message sent by the network device, it can determine the CHO configuration information that can be used in the judgment process of whether the CHO execution condition is satisfied according to its own altitude.
  • the terminal device can use config#1; when the flying height is higher than or equal to H1 and lower than or equal to H2, the terminal device can use config#2; when the flying height is higher than H2, the terminal device can use config#3.
  • the terminal device determines the CHO configuration information that can be used in the judging process of whether the CHO execution condition is satisfied, it performs subsequent processes (eg, judging whether the CHO execution condition is satisfied, determining the target cell, trying to access the target cell, etc.).
  • the terminal device performs the follow-up process according to config#1; if the height of the terminal device is higher than or equal to H1 and lower than or equal to H2, the terminal device performs follow-up according to config#2 Process: If the height of the terminal device is higher than H2, the terminal device performs the subsequent process according to config#3.
  • the terminal device After the terminal device determines the CHO configuration information (or the candidate cell corresponding to the available CHO configuration information) that can be used in the process of determining whether the CHO execution condition is satisfied, it can determine the target cell based on the determined CHO configuration information .
  • the determined CHO configuration information is included in the CHO configuration information corresponding to the first cell. That is, the method flow shown in FIG. 4 further includes: S430, the terminal device determines a target cell, the determined target cell belongs to a candidate cell, and the target cell satisfies the CHO execution condition.
  • the target cell refers to the cell that the terminal device attempts to handover to/access
  • the source cell refers to the cell that provides services for the terminal device before the handover.
  • the above-mentioned first cell includes one or more second cells that meet the corresponding CHO execution conditions, or,
  • the terminal device After the terminal device receives the RRC message that includes the CHO configuration information corresponding to the altitude interval, it determines the available CHO configuration information based on its own altitude (in other words, determines the fifth cell corresponding to the available CHO configuration information) ; Then according to the available CHO configuration information, determine the cell (such as the second cell) that meets the CHO execution condition in the fifth cell.
  • the terminal device determining the target cell includes: the terminal device determining the target cell from the above-mentioned one or more second cells that meet the corresponding CHO execution condition.
  • the terminal device may randomly determine the target cell from one or more second cells.
  • the terminal device determines the target cell from the multiple second cells based on the change trend of the distance of the terminal device relative to the source cell. That is, when multiple second cells respectively meet the CHO execution condition, the terminal device can determine the target cell from the multiple second cells according to its own flight direction.
  • the terminal device selects the cell that is the farthest from the source cell from the multiple second cells as the target cell; or,
  • the terminal device selects the cell closest to the source cell from the multiple second cells as the target cell.
  • the CHO configuration information corresponding to the first cell further includes distance information, and the distance information indicates the distance between the first cell and the source cell.
  • the information used to indicate the distance between the first cell (one or more cells may be included in the first cell) and the source cell can have multiple representation forms, for example, the distance between the first cell and the source cell, or , Represents the level information of the distance between the first cell and the source cell.
  • This application does not limit the specific form of the indication information, and the terminal device can determine the distance between the first cell and the source cell based on the indication information.
  • the aforementioned level information may be represented by binary values.
  • the level information can be represented by a 2-bit binary value; if 5 first cells are configured, the level information can be represented by a 3-bit binary value.
  • a specific way of expression is that the first cell closest to the source cell can be expressed as 0 level, and so on, that is, the smaller the number of levels, the closer the distance from the source cell; or vice versa, the farthest from the source cell
  • Candidate cells can be expressed as level 0, and so on, that is, the smaller the number of levels, the farther the distance from the source cell is.
  • the mapping relationship between level information and distance (for example, the smaller the binary value (or level number), the closer the distance from the source cell or the greater the distance from the source cell) can be agreed upon by agreement or network equipment Instructed, the embodiment of this application does not limit this.
  • the use of binary values to represent grade information is just an example, and does not constitute any limitation to the scope of protection of this application.
  • the grade information can also have other representation forms.
  • the above grade information can be in octal, decimal, or hexadecimal. It is expressed as a numerical value, which is not limited in the embodiment of the present application.
  • the network device is configured with 3 first cells (such as cell#1, cell#2, cell#3).
  • the level information can be set to "00"
  • cell#1 is the next closest to the source cell
  • the level information can be set to "01”
  • cell#3 is away from the source cell The farthest, the level information can be set to "10".
  • cell#1, cell#2, and cell#3 respectively correspond to the PCI
  • cell#1, cell#2, and cell#3 are respectively the C-RNTI allocated by the terminal equipment, and the RACH resource information required for access to cell#1 , RACH resource information required to access cell#2, RACH resource information required to access cell#3, index information and frequency information of cell#1, index information and frequency information of cell#2, index of cell#3 Information and frequency information.
  • the RRC message may also include the corresponding hierarchical information of cell#1, cell#2, and cell#3.
  • the hierarchical information of cell#1 is "01", and the hierarchical information of cell#2 is "00". ", the level information of cell#3 is "10".
  • the RRC message may also include the distance length values of cell#1, cell#2, and cell#3 from the source cell. If the terminal device determines that cell#1 and cell#3 meet the CHO execution conditions based on the above RRC message, the terminal device can determine the target cell in combination with its own flight trend. For example, if the flight path of the terminal device is gradually away from the source cell, the terminal device can determine cell#3 as the target cell. If the flight path of the terminal device is gradually approaching the source cell, the terminal device can determine cell#1 as the target cell. Community.
  • the network device may implicitly indicate the distance information between each first cell and the source cell, for example, the protocol stipulates or indicates through the first indication information that each first cell in the CHO configuration information corresponding to the multiple first cells The order of the cells is arranged in descending order of the distance from the source cell, that is, the first cell contained in the CHO configuration information corresponding to the first cell is the farthest from the source cell, and the last cell is the closest to the source cell; or, agreement It is specified or indicated by the second indication information that the order of each first cell in the CHO configuration information corresponding to multiple first cells is arranged in descending order of the distance from the source cell, that is, the CHO configuration information corresponding to the first cell contains The first cell is closest to the source cell, and the last cell is the farthest from the source cell. It can also be other implicit instructions, which will
  • the above-mentioned first indication information or second indication information may be 1-bit information, for example, a value of 0 indicates that the order of each first cell in the CHO configuration information corresponding to the first cell is based on the distance from the source cell Arrange from farthest to nearest; a value of 1 means that the order of each first cell in the CHO configuration information corresponding to the first cell is arranged from nearer to farthest according to the distance from the source cell.
  • the indication information being a 1-bit binary value is just an example, and does not constitute any limitation to the protection scope of this application.
  • the indication information may also have other representation forms.
  • the first indication information or the second indication information may be a Boolean value. Or whether to carry a certain cell, the embodiment of this application does not limit this.
  • the above-mentioned distance between the terminal device and the source cell can be understood as: the linear distance between the terminal device and the source cell, the vertical distance between the terminal device and the source cell, the horizontal distance between the terminal device and the source cell, etc.;
  • the distance between a cell and the source cell can be understood as: the linear distance between the first cell and the source cell, the vertical distance between the first cell and the source cell, the horizontal distance between the first cell and the source cell, and so on.
  • the terminal device determines the target cell from the multiple second cells based on the signal quality change trends of the multiple second cells, where the signal quality change trend of the second cell includes the signal quality of the second cell
  • the changing trend in the TTT corresponding to the second cell for example, the changing trend of the cell signal quality of the second cell in the TTT corresponding to the second cell, and/or the signal quality of the beam belonging to the second cell in the second cell
  • the target cell is a cell in which the signal quality change trend shows an upward trend among multiple second cells.
  • the CHO configuration information corresponding to the first cell further includes a signal quality threshold, where the signal quality threshold may include the signal quality threshold of the cell (such as threshold E) and/or The signal quality threshold of the beam (such as threshold F). If the signal quality of a cell shows an upward trend in the corresponding TTT and the rate of change of signal quality is greater than or equal to the signal quality threshold, and the cell meets the CHO execution condition in the corresponding TTT, the cell can Is determined as the target cell.
  • the signal quality threshold may include the signal quality threshold of the cell (such as threshold E) and/or The signal quality threshold of the beam (such as threshold F).
  • the cell can be determined as the target cell; or, if it belongs to at least one beam (such as M beams) of a certain cell, M is a positive integer greater than or equal to 1, and M can be agreed upon by the agreement or carried in
  • the signal quality of the above RRC message containing the CHO configuration information shows an upward trend within the corresponding TTT, and the rate of change of its signal quality is greater than or equal to the signal quality threshold of the beam (such as F), and the cell is in the same
  • the corresponding TTT meets the CHO execution condition, the cell can be determined as the target cell; or, if the cell signal quality of a cell shows an upward trend in the corresponding TTT and the rate of change of its signal quality is greater than or equal to the signal quality of the cell
  • the terminal device determines the target cell from the multiple second cells based on the change trend of the signal quality of the multiple second cells meeting the CHO execution condition and the change trend of the distance of the terminal device from the source cell.
  • the terminal device selects a cell with an increasing trend in signal quality among at least one second cell that is far from the source cell from among multiple second cells as the target cell ;or,
  • the terminal device selects a cell with an increasing trend in signal quality among at least one second cell that is closer to the source cell from among the multiple second cells as the target cell.
  • the foregoing method of determining the target cell from multiple second cells can be combined with the foregoing S410 and S420 (that is, the first cell is determined based on the path information shown in S410 and S420, and then the first cell is determined according to the path shown in S430. Determine the target cell from the first cell).
  • the network device sends the CHO configuration information corresponding to the first cell to the terminal device.
  • the network device determines that the first cell may not perform S410 in this embodiment based on the path information reported by the terminal device. For example, the network device may determine that the terminal device of the first cell receives the first cell according to the measurement report.
  • the target cell is determined from the first cell as shown in S430, which will not be repeated in this application.
  • the size of the sequence numbers of the foregoing processes does not imply the order of execution.
  • the execution order of the processes should be determined by their functions and internal logic, and should not constitute any limitation to the implementation process of the embodiments of this application. . And it may not be necessary to perform all operations in the foregoing method embodiments.
  • terminal device and/or the network device in the foregoing method embodiments may perform some or all of the steps in the embodiments. These steps or operations are only examples. The embodiments of the present application may also include performing other operations or variations of various operations. .
  • FIG. 5 is a schematic diagram of an apparatus 500 for handover provided in the present application.
  • the device 500 includes a processing unit 510, a receiving unit 520, and a sending unit 530.
  • the sending unit 530 is configured to send path information of the terminal device to a network device, where the path information is used to determine the first cell.
  • the receiving unit 520 is configured to receive conditional handover CHO configuration information corresponding to the first cell from the network device;
  • the processing unit 510 is configured to determine a target cell according to the CHO configuration information corresponding to the first cell.
  • the device 500 corresponds to the terminal device in the method embodiment, and the device 500 may be the terminal device in the method embodiment, or a chip or functional module inside the terminal device in the method embodiment.
  • the corresponding unit of the apparatus 500 is used to execute the corresponding steps executed by the terminal device in the method embodiment shown in FIG. 4.
  • the processing unit 510 in the apparatus 500 is configured to execute the steps related to the processing corresponding to the terminal device in the method embodiment. For example, step S430 of determining the target cell in FIG. 4 is performed.
  • the receiving unit 520 in the apparatus 500 executes the steps of the terminal device receiving in the method embodiment. For example, step S420 in FIG. 4 of receiving the conditional handover CHO configuration information corresponding to the first cell sent by the network device is performed.
  • the sending unit 530 in the apparatus 500 is configured to execute the step of sending by the terminal device, for example, execute step S410 of sending path information to the network device in FIG. 4.
  • the receiving unit 520 and the sending unit 530 may constitute a transceiving unit and have the functions of receiving and sending at the same time.
  • the processing unit 510 may be at least one processor.
  • the sending unit 530 may be a transmitter or an interface circuit, and the receiving unit 520 may be a receiver or an interface circuit.
  • the receiver and transmitter can be integrated to form a transceiver or interface circuit.
  • the device 500 may further include a storage unit for storing data and/or signaling.
  • the processing unit 510, the sending unit, and the receiving unit 520 may interact or couple with the storage unit, for example, read or call the storage unit. Data and/or signaling to enable the method of the above-mentioned embodiment to be executed.
  • Each of the above units can exist independently, or can be fully or partially integrated.
  • FIG. 6 is a schematic structural diagram of a terminal device 600 applicable to an embodiment of the present application.
  • the terminal device 600 can be applied to the system shown in FIG. 1.
  • FIG. 6 only shows the main components of the terminal device.
  • the terminal device 600 includes a processor, a memory, a control circuit, an antenna, and an input and output device.
  • the processor is used to control the antenna and the input and output devices to send and receive signals
  • the memory is used to store a computer program
  • the processor is used to call and run the computer program from the memory to execute the corresponding method executed by the terminal device in the method for registration proposed in this application. Process and/or operation. I won't repeat them here.
  • FIG. 6 only shows a memory and a processor. In an actual terminal device, there may be multiple processors and memories.
  • the memory may also be referred to as a storage medium or a storage device, etc., which is not limited in the embodiment of the present application.
  • FIG. 7 is a schematic diagram of an apparatus 700 for handover provided in the present application.
  • the apparatus 700 includes a receiving unit 710 and a sending unit 720.
  • the receiving unit 710 is configured to receive path information of the terminal device from the terminal device, where the path information is used to determine the first cell;
  • the sending unit 720 is configured to send the conditional handover CHO configuration information corresponding to the first cell to the terminal device.
  • the device 700 corresponds to the network device in the method embodiment, and the device 700 may be the network device in the method embodiment, or a chip or functional module inside the network device in the method embodiment.
  • the corresponding units of the apparatus 700 are used to execute the corresponding steps executed by the network device in the method embodiment shown in FIG. 4.
  • the sending unit 720 in the apparatus 700 executes the steps sent by the network device in the method embodiment, for example, executes step S420 of sending the conditional handover CHO configuration information corresponding to the first cell to the terminal device in FIG. 4.
  • the receiving unit 710 in the apparatus 700 is configured to perform the steps of receiving by the network device. For example, step S410 of receiving the path information sent by the terminal device.
  • the apparatus 700 may further include a processing unit, which is configured to execute corresponding processing-related steps within the network device.
  • the receiving unit 710 and the sending unit 720 may constitute a transceiver unit, and have the functions of receiving and sending at the same time.
  • the processing unit may be at least one processor.
  • the sending unit 720 may be a transmitter or an interface circuit.
  • the receiving unit 710 may be a receiver or an interface circuit. The receiver and transmitter can be integrated to form a transceiver or interface circuit.
  • the device 700 may further include a storage unit for storing data and/or signaling.
  • the processing unit, the sending unit 720, and the receiving unit 710 may interact or couple with the storage unit, for example, read or call the storage unit. Data and/or signaling to enable the method of the above-mentioned embodiment to be executed.
  • Each of the above units can exist independently, or can be fully or partially integrated.
  • FIG. 8 is a schematic structural diagram of a network device 800 applicable to an embodiment of the present application, and can be used to implement the function of the network device in the above-mentioned paging method. It can be a schematic diagram of the structure of a network device.
  • the network device 800 may include CU, DU, and AAU.
  • the network device consists of one or more radio frequency units, such as For the remote radio unit (RRU) and one or more baseband units (BBU):
  • RRU remote radio unit
  • BBU baseband units
  • the non-real-time part of the original BBU will be divided and redefined as CU, which is responsible for processing non-real-time protocols and services.
  • Part of the physical layer processing functions of the BBU are merged with the original RRU and passive antennas into AAU, and the remaining functions of the BBU are redefined as DU.
  • CU and DU are distinguished by the real-time nature of processing content, and AAU is a combination of RRU and antenna.
  • CU, DU, and AAU can be separated or co-located. Therefore, there will be multiple network deployment forms.
  • One possible deployment form is consistent with traditional 4G network equipment.
  • CU and DU share hardware deployment.
  • FIG. 8 is only an example, and does not limit the scope of protection of this application.
  • the deployment form may also be DU deployment in a 5G BBU computer room, CU centralized deployment or DU centralized deployment, and CU higher-level centralized deployment.
  • the AAU 801 that can implement the transceiving function is called a transceiving unit 801, which corresponds to the transmitting unit 720 in FIG. 7.
  • the transceiver unit 801 may also be called a transceiver, a transceiver circuit, or a transceiver, etc., and it may include at least one antenna 8011 and a radio frequency unit 8012.
  • the transceiving unit 801 may include a receiving unit and a transmitting unit, the receiving unit may correspond to a receiver (or receiver, receiving circuit), and the transmitting unit may correspond to a transmitter (or transmitter, transmitting circuit).
  • the CU and DU 802 that can implement internal processing functions are called processing units 802.
  • the processing unit 802 may control network devices, etc., and may be referred to as a controller.
  • the AAU 801, the CU and the DU 802 may be physically set together, or may be physically separated.
  • the network device is not limited to the form shown in FIG. 8, and may also be in other forms: for example, including BBU and ARU, or including BBU and AAU; it may also be CPE or other forms, which is not limited by this application.
  • the network device 800 shown in FIG. 8 can implement the functions of the network device involved in the method embodiment of FIG. 4.
  • the operations and/or functions of each unit in the network device 800 are respectively for implementing the corresponding process executed by the network device in the method embodiment of the present application.
  • detailed descriptions are appropriately omitted here.
  • the structure of the network device illustrated in FIG. 8 is only a possible form, and should not constitute any limitation in the embodiment of the present application. This application does not exclude the possibility of other types of network equipment structures that may appear in the future.
  • the embodiment of the present application also provides a communication system, which includes the aforementioned terminal device and network device.
  • the present application also provides a computer-readable storage medium that stores instructions in the computer-readable storage medium.
  • the computer executes each of the steps performed by the terminal device in the method shown in FIG. 4 above. step.
  • the present application also provides a computer-readable storage medium that stores instructions in the computer-readable storage medium.
  • the computer executes each of the operations performed by the network device in the method shown in FIG. 4 above. step.
  • This application also provides a computer program product containing instructions.
  • the computer program product runs on a computer, the computer executes the steps performed by the terminal device in the method shown in FIG. 4.
  • the present application also provides a computer program product containing instructions.
  • the computer program product When the computer program product is run on a computer, the computer executes the steps performed by the network device in the method shown in FIG. 4.
  • the application also provides a chip including a processor.
  • the processor is used to read and run the computer program stored in the memory to execute the corresponding operation and/or process executed by the terminal device in the method for switching provided in this application.
  • the chip further includes a memory, the memory and the processor are connected to the memory through a circuit or a wire, and the processor is used to read and execute the computer program in the memory.
  • the chip further includes a communication interface, and the processor is connected to the communication interface.
  • the communication interface is used to receive processed data and/or information, and the processor obtains the data and/or information from the communication interface, and processes the data and/or information.
  • the communication interface may be an input/output interface, interface circuit, output circuit, input circuit, pin or related circuit on the chip.
  • the processor may also be embodied as a processing circuit or a logic circuit.
  • the application also provides a chip including a processor.
  • the processor is used to read and run the computer program stored in the memory to execute the corresponding operation and/or process executed by the network device in the method for handover provided in this application.
  • the chip further includes a memory, the memory and the processor are connected to the memory through a circuit or a wire, and the processor is used to read and execute the computer program in the memory.
  • the chip further includes a communication interface, and the processor is connected to the communication interface.
  • the communication interface is used to receive processed data and/or information, and the processor obtains the data and/or information from the communication interface, and processes the data and/or information.
  • the communication interface may be an input/output interface, interface circuit, output circuit, input circuit, pin or related circuit on the chip.
  • the processor may also be embodied as a processing circuit or a logic circuit.
  • the above-mentioned chip can also be replaced with a chip system, which will not be repeated here.
  • the disclosed system, device, and method can be implemented in other ways.
  • the device embodiments described above are merely illustrative.
  • the division of the units is only a logical function division, and there may be other divisions in actual implementation, for example, multiple units or components may be combined It can be integrated into another system, or some features can be ignored or not implemented.
  • the displayed or discussed mutual couplings or direct couplings or communication connections may be indirect couplings or communication connections between devices or units through some interfaces, and may be in electrical, mechanical or other forms.
  • the units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, they may be located in one place, or they may be distributed on multiple network units. Some or all of the units may be selected according to actual conditions to achieve the objectives of the solutions of the embodiments.
  • the functional units in the various embodiments of the present application may be integrated into one processing unit, or each unit may exist alone physically, or two or more units may be integrated into one unit.
  • the function is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer readable storage medium.
  • the technical solution of the present application essentially or the part that contributes to the existing technology or the part of the technical solution can be embodied in the form of a software product, and the computer software product is stored in a storage medium, including Several instructions are used to make a computer device (which may be a personal computer, a server, or a network device, etc.) execute all or part of the steps of the methods described in the various embodiments of the present application.
  • the aforementioned storage media include: U disk, mobile hard disk, read-only memory (read-only memory, ROM), random access memory (random access memory, RAM), magnetic disks or optical disks and other media that can store program codes. .
  • the term "and/or” in this application is only an association relationship that describes associated objects, which means that there can be three types of relationships, for example, A and/or B, which can mean that A alone exists, and both A and B exist. , There are three cases of B alone.
  • the character "/" in this document generally means that the associated objects before and after are in an "or” relationship; the term “at least one” in this application can mean “one” and "two or more", for example, A At least one of, B and C can mean: A alone exists, B alone exists, C alone exists, A and B exist alone, A and C exist at the same time, C and B exist at the same time, A and B and C exist at the same time, this Seven situations.

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Abstract

本申请提供了一种用于切换的方法和装置。该用于切换的方法包括：终端设备向网络设备发送用于确定第一小区的路径信息，终端设备接收网络设备发送的第一小区对应的条件切换CHO配置信息并根据所述第一小区对应的CHO配置信息确定目标小区。本申请提供的技术方案可以使得终端设备在进行小区切换的时候，提高切换的成功率。

Description

用于切换的方法和装置 技术领域
本申请涉及通信领域，并且更具体地，涉及一种用于切换的方法和装置。
背景技术
在传统切换机制中，连接态终端设备的移动性管理由网络设备控制。具体地，传统切换流程包括网络设备向终端设备发送切换消息，该切换消息指示终端设备从源小区切换至目标小区，具体的，该切换消息中可以包含目标小区的标识信息(如物理小区标识)以及切换至目标小区所需的资源信息(如随机接入资源信息等)。终端设备在接收到该切换消息后，根据切换消息，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切换成功的必要条件。然而，在LTE系统或NR系统中，信道质量的快速衰减、或者UE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。为了提高切换可靠性，提出一种条件切换(conditional handover，CHO)机制。但是，目前协议中并未规定如何在无人机场景中使用CHO机制。
发明内容
本申请提供一种用于切换的方法和装置，以期提高切换成功率。
第一方面，提供了一种用于切换的方法，该用于切换的方法可以由终端设备执行，或者，也可以由设置于终端设备中的芯片或电路执行，本申请对此不作限定，为了便于描述，可以以由终端设备执行为例进行说明。
该用于切换的方法包括：
终端设备向网络设备发送该终端设备的路径信息，该路径信息用于确定第一小区；该终端设备接收来自该网络设备的第一小区对应的条件切换CHO配置信息；该终端设备根据该第一小区对应的CHO配置信息确定目标小区。
根据本申请实施例提供的用于切换的方法，通过终端设备向网络设备发送用于确定第一小区的路径信息，并接收到来自网络设备的第一小区对应的CHO配置信息，基于该第一小区对应的CHO配置信息确定目标小区，由于该第一小区为结合上述的路径信息确定的，即网络设备能够给终端设备提供较合适的候选小区，进而提高切换的成功率。
结合第一方面，在第一方面的某些实现方式中，该第一小区对应的CHO配置信息与高度相关；该方法还包括：该终端设备基于该终端设备所处的高度确定该第一小区对应的CHO配置信息。
上述的第一小区对应的CHO配置信息可以是与高度相关的，对于不同的高度，对应着不同的第一小区对应的CHO配置信息。网络设备可以提供高度粒度的第一小区对应的CHO配置信息，从而，网络设备能灵活合理地提供第一小区对应的CHO配置信息，提高切换可靠性。
结合第一方面，在第一方面的某些实现方式中，该第一小区对应的CHO配置信息包括CHO执行条件和以下信息中的至少一种：该第一小区为终端设备分配的小区无线网络临时标识C-RNTI、该终端设备接入该第一小区所需的资源信息、该第一小区对应的索引信息、该第一小区的标识信息、或该第一小区的频率信息。
上述的第一小区对应的CHO配置信息中可以包括第一小区对应的CHO执行条件以及终端设备切换至第一小区需要的信息，为终端设备实现切换提供可行性。
结合第一方面，在第一方面的某些实现方式中，如果该第一小区包括一个或多个满足对应的CHO执行条件的第二小区，该终端设备根据该第一小区对应的CHO配置信息确定目标小区包括：该终端设备从该一个或多个第二小区中确定该目标小区。
在第一小区中包括至少一个满足CHO执行条件的第二小区的情况下，终端设备可以从该至少一个第二小区中选择一个目标小区，作为待切换至的小区。
结合第一方面，在第一方面的某些实现方式中，该终端设备从该多个第二小区中确定该目标小区包括：该终端设备基于该终端设备相对于源小区的距离变化趋势从该多个第二小区中确定该目标小区。
作为一种可能的实现方式，在第一小区中包括至少一个满足CHO执行条件的第二小区的情况下，终端设备可以基于自身与源小区之间的距离的变化趋势从该至少一个第二小区中选择一个目标小区，作为待切换至的小区。
结合第一方面，在第一方面的某些实现方式中，该终端设备基于该终端设备相对于源小区的距离变化趋势从该多个第二小区中确定该目标小区包括：当该终端设备相对于源小区的距离变大时，该终端设备从该多个第二小区中选择距离该源小区最远的小区为该目标小区；或者，当该终端设备相对于源小区的距离变小时，该终端设备从该多个第二小区中选择距离该源小区最近的小区为该目标小区。
在终端设备远离源小区的情况下，终端设备可以选择距离源小区最远的小区作为目标小区；在终端设备靠近源小区的情况下，终端设备可以选择距离源小区最近的小区作为目标小区。
结合第一方面，在第一方面的某些实现方式中，该第一小区对应的CHO配置信息中还包括距离信息，该距离信息用于指示该第一小区与该源小区之间的距离。
为了使得终端设备获知第一小区与源小区之间的距离，上述的第一小区对应的CHO配置信息中可以携带指示第一小区与该源小区之间距离的距离信息。
结合第一方面，在第一方面的某些实现方式中，该终端设备从多个满足CHO执行条件的第二小区中确定目标小区包括：该终端设备基于该多个第二小区的信号质量变化趋势，从该多个第二小区中确定出目标小区，其中，该第二小区的信号质量变化趋势包括该第二小区的信号质量在该第二小区对应的TTT内的变化趋势。
作为一种可能的实现方式，在第一小区中包括至少一个满足CHO执行条件的第二小区的情况下，终端设备可以基于第二小区的信号质量变化趋势从该至少一个第二小区中选择一个目标小区，作为待切换至的小区。
结合第一方面，在第一方面的某些实现方式中，该目标小区为该多个第二小区中信号质量变化趋势呈上升趋势的一个小区。
终端设备可以选择质量变化趋势呈上升趋势的小区作为目标小区，以保证选择信号质 量较好的小区进行切换。
结合第一方面，在第一方面的某些实现方式中，该第一小区对应的CHO配置信息中还包括门限值，该目标小区为该多个第二小区中信号质量变化趋势呈上升趋势且信号质量的变化率大于或者等于该门限值的一个小区。
为了使得终端设备选择信号质量较好的小区作为目标小区，网络设备发送的上述第一小区对应的CHO配置信息中可以携带门限值，如此，终端设备在确定目标小区时，可以选择信号质量变化趋势呈上升趋势且信号质量的变化率大于或者等于门限值的小区作为目标小区。
第二方面，提供了一种用于切换的方法，该用于切换的方法可以由网络设备执行，或者，也可以由设置于网络设备中的芯片或电路执行，本申请对此不作限定，为了便于描述，可以以由网络设备执行为例进行说明。
该用于切换的方法包括：
网络设备接收来自终端设备的该终端设备的路径信息，该路径信息用于确定第一小区；该网络设备向该终端设备发送第一小区对应的条件切换CHO配置信息。
根据本申请实施例提供的用于切换的方法，通过终端设备向网络设备发送用于确定第一小区的路径信息，并接收到来自网络设备的第一小区对应的CHO配置信息，基于该第一小区对应的CHO配置信息确定目标小区，由于该第一小区为结合上述的路径信息确定的，即网络设备能够给终端设备提供较合适的候选小区，进而提高切换的成功率。
结合第二方面，在第二方面的某些实现方式中，该第一小区对应的CHO配置信息与高度相关。
上述的第一小区对应的CHO配置信息可以是与高度相关的，不同的高度对应有不同的第一小区对应的CHO配置信息。网络设备可以提供高度粒度的第一小区对应的CHO配置信息，从而，网络设备能灵活合理地提供第一小区对应的CHO配置信息，提高切换可靠性。
结合第二方面，在第二方面的某些实现方式中，该第一小区对应的CHO配置信息包括CHO执行条件和以下信息中的至少一种：该第一小区为终端设备分配的小区无线网络临时标识C-RNTI、该终端设备接入该第一小区所需的资源信息、该第一小区对应的索引信息、该第一小区的标识信息、或该第一小区的频率信息。
上述的第一小区对应的CHO配置信息中可以包括第一小区对应的CHO执行条件以及终端设备切换至第一小区需要的信息，为终端设备实现切换提供可行性。
结合第二方面，在第二方面的某些实现方式中，该第一小区对应的CHO配置信息中还包括距离信息，该距离信息用于指示该第一小区与该源小区之间的距离。
为了使得终端设备获知第一小区与源小区之间的距离，上述的第一小区对应的CHO配置信息中可以携带指示第一小区与该源小区之间距离的距离信息。
第三方面，提供了一种用于切换的方法，该用于切换的方法可以由终端设备执行，或者，也可以由设置于终端设备中的芯片或电路执行，本申请对此不作限定，为了便于描述，可以以由终端设备执行为例进行说明。
该用于切换的方法包括：
终端设备接收来自网络设备的第一小区对应的条件切换CHO配置信息，该终端设备 根据该第一小区对应的条件切换CHO配置信息，确定该第一小区中存在一个或多个满足对应的CHO执行条件的第二小区，并基于该终端设备相对于源小区的距离变化趋势，从该一个或多个第二小区中确定目标小区。
根据本申请实施例提供的用于切换的方法，在第一小区中包括至少一个满足CHO执行条件的第二小区的情况下，终端设备可以基于自身与源小区之间的距离的变化趋势，从该至少一个第二小区中选择一个目标小区，作为待切换至的小区。
结合第三方面，在第三方面的某些实现方式中，该终端设备基于该终端设备相对于源小区的距离变化趋势，从该多个第二小区中确定该目标小区包括：当该终端设备相对于源小区的距离变大时，该终端设备从该多个第二小区中选择距离该源小区最远的小区为目标小区；或者，当该终端设备相对于源小区的距离变小时，该终端设备从该多个第二小区中选择距离该源小区最近的小区为目标小区。
在终端设备远离源小区的情况下，终端设备可以从满足CHO执行条件的候选小区中选择距离源小区最远的小区作为目标小区；在终端设备靠近源小区的情况下，终端设备可以从满足CHO执行条件的候选小区中选择距离源小区最近的小区作为目标小区。
结合第三方面，在第三方面的某些实现方式中，该第一小区对应的CHO配置信息中还包括距离信息，该距离信息用于指示该第一小区与该源小区之间的距离。
为了使得终端设备获知第一小区与源小区之间的距离，上述的第一小区对应的CHO配置信息中可以携带指示第一小区与该源小区之间距离的距离信息。
第四方面，提供了一种用于切换的方法，该用于切换的方法可以由终端设备执行，或者，也可以由设置于终端设备中的芯片或电路执行，本申请对此不作限定，为了便于描述，可以以由终端设备执行为例进行说明。
该用于切换的方法包括：
终端设备接收来自网络设备的第一小区对应的条件切换CHO配置信息；该终端设备根据该第一小区对应的条件切换CHO配置信息，确定该第一小区中存在一个或多个满足对应的CHO执行条件的第二小区，终端设备基于该一个或多个第二小区的信号质量变化趋势从该一个或多个第二小区中确定目标小区，其中，该第二小区的信号质量变化趋势包括该第二小区的信号质量在该第二小区对应的TTT内的变化趋势。
根据本申请实施例提供的用于切换的方法，在第一小区中包括至少一个满足CHO执行条件的第二小区的情况下，终端设备可以基于第二小区的信号质量变化趋势，从该至少一个第二小区中选择一个目标小区，作为待切换至的小区。
结合第四方面，在第四方面的某些实现方式中，当第一小区中包括至少一个满足CHO执行条件的第二小区的情况下，目标小区为该多个第二小区中信号质量变化趋势呈上升趋势的一个小区。
终端设备可以选择质量变化趋势呈上升趋势的小区作为目标小区，以保证选择信号质量较好的小区进行切换。
结合第四方面，在第四方面的某些实现方式中，该第一小区对应的CHO配置信息中还包括门限值，该目标小区为该多个第二小区中信号质量变化趋势呈上升趋势且信号质量的变化率大于或者等于该门限值的一个小区。
为了选择信号质量较好的第二小区，可以在上述的第一小区对应的CHO配置信息中 携带门限值，选择信号质量变化趋势呈上升趋势且信号质量的变化率大于或者等于门限值的小区作为目标小区。
第五方面，提供一种用于切换的装置，该用于切换的装置包括处理器，用于实现上述第一方面、第三方面和第四方面描述的方法中终端设备的功能。
可选地，该用于切换的装置还可以包括存储器，该存储器与该处理器耦合，该处理器用于实现上述第一方面、第三方面和第四方面描述的方法中终端设备的功能。
在一种可能的实现中，该存储器用于存储程序指令和数据。该存储器与该处理器耦合，该处理器可以调用并执行该存储器中存储的程序指令，用于实现上述第一方面、第三方面和第四方面描述的方法中终端设备的功能。
可选地，该用于切换的装置还可以包括通信接口，该通信接口用于该用于切换的装置与其它设备进行通信。当该用于切换的装置为终端设备时，该收发器可以是通信接口，或，输入/输出接口。
在一种可能的设计中，该用于切换的装置包括：处理器和通信接口，用于实现上述第一方面、第三方面和第四方面描述的方法中终端设备的功能，具体地包括：
该处理器利用该通信接口与外部通信；
该处理器用于运行计算机程序，使得该装置实现上述第一方面、第三方面和第四方面描述的任一种方法。
可以理解，该外部可以是处理器以外的对象，或者是该装置以外的对象。
在另一种实现方式中，该用于切换的装置为芯片或芯片系统时，该通信接口可以是是该芯片或芯片系统上输入/输出接口、接口电路、输出电路、输入电路、管脚或相关电路等。该处理器也可以体现为处理电路或逻辑电路。
第六方面，提供一种用于切换的装置，该用于切换的装置包括处理器，用于实现上述第二方面描述的方法中网络设备的功能。
可选地，该用于切换的装置还可以包括存储器，该存储器与该处理器耦合，该处理器用于实现上述第二方面描述的方法中网络设备的功能。
在一种可能的实现中，该存储器用于存储程序指令和数据。该存储器与该处理器耦合，该处理器可以调用并执行该存储器中存储的程序指令，用于实现上述第二方面描述的方法中网络设备的功能。
可选地，该用于切换的装置还可以包括通信接口，该通信接口用于该用于切换的装置与其它设备进行通信。当该用于切换的装置为网络设备时，该通信接口为收发器、输入/输出接口、或电路等。
在一种可能的设计中，该用于切换的装置包括：处理器和通信接口，用于实现上述第二方面描述的方法中网络设备的功能，具体地包括：
该处理器利用该通信接口与外部通信；
该处理器用于运行计算机程序，使得该装置实现上述第二方面描述的任一种方法。
可以理解，该外部可以是处理器以外的对象，或者是该装置以外的对象。
在另一种可能的设计中，该用于切换的装置为芯片或芯片系统。该通信接口可以是该芯片或芯片系统上的输入/输出接口、接口电路、输出电路、输入电路、管脚或相关电路等。该处理器也可以体现为处理电路或逻辑电路。
第七方面，提供一种计算机可读存储介质，其上存储有计算机程序，该计算机程序被通信装置执行时，使得该通信装置实现第一方面、第三方面和第四方面以及第一方面、第三方面和第四方面的任一可能的实现方式中的方法。
第八方面，提供一种计算机可读存储介质，其上存储有计算机程序，该计算机程序被通信装置执行时，使得该通信装置实现第二方面以及第二方面的任一可能的实现方式中的方法。
第九方面，提供一种包含指令的计算机程序产品，该指令被计算机执行时使得通信装置实现第一方面、第三方面和第四方面以及第一方面、第三方面和第四方面的任一可能的实现方式中的方法。
第十方面，提供一种包含指令的计算机程序产品，该指令被计算机执行时使得通信装置实现第二方面以及第二方面的任一可能的实现方式中的方法。
第十一方面，提供了一种通信系统，包括第五方面所示的用于切换的装置和第六方面所示的用于切换的装置。
附图说明
图1是能够适用本申请实施例用于切换的方法的系统100的示意图。
图2是本申请实施例提供的一种CHO机制示意图。
图3是本申请实施例提供的一种无人机检测到的小区示意图。
图4是本申请实施例提供的一种用于切换的方法示意性流程图。
图5是本申请提供的用于切换的装置500的示意图。
图6是适用于本申请实施例的用终端设备600的结构示意图。
图7是本申请提供的用于切换的装置700的示意图。
图8是适用于本申请实施例的网络设备800的结构示意图。
具体实施方式
下面将结合附图，对本申请中的技术方案进行描述。
本申请实施例的技术方案可以应用于各种通信系统，例如：长期演进(long term evolution，LTE)系统、LTE频分双工(frequency division duplex，FDD)系统、LTE时分双工(time division duplex，TDD)、通用移动通信系统(universal mobile telecommunication system，UMTS)、全球互联微波接入(worldwide interoperability for microwave access，WiMAX)通信系统、第五代(5th generation，5G)系统、新无线(new radio，NR)或未来网络等，本申请中所述的5G移动通信系统包括非独立组网(non-standalone，NSA)的5G移动通信系统或独立组网(standalone，SA)的5G移动通信系统。本申请提供的技术方案还可以应用于未来的通信系统，如第六代移动通信系统。通信系统还可以是陆上公用移动通信网(public land mobile network，PLMN)网络、设备到设备(device-to-device，D2D)通信系统、机器到机器(machine to machine，M2M)通信系统、物联网(internet of things，IoT)通信系统或者其他通信系统。
本申请实施例中的终端设备(terminal equipment)可以指接入终端、用户单元、用户站、移动站、移动台、中继站、远方站、远程终端、移动设备、用户终端(user terminal)、 用户设备(user equipment，UE)、终端(terminal)、无线通信设备、用户代理或用户装置。终端设备还可以是蜂窝电话、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、个人数字助理(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、可穿戴设备，5G网络中的终端设备或者未来演进的公用陆地移动通信网络(public land mobile network，PLMN)中的终端设备或者未来车联网中的终端设备等，本申请实施例对此并不限定。
作为示例而非限定，在本申请实施例中，可穿戴设备也可以称为穿戴式智能设备，是应用穿戴式技术对日常穿戴进行智能化设计、开发出可以穿戴的设备的总称，如眼镜、手套、手表、服饰及鞋等。可穿戴设备即直接穿在身上，或是整合到用户的衣服或配件的一种便携式设备。可穿戴设备不仅仅是一种硬件设备，更是通过软件支持以及数据交互、云端交互来实现强大的功能。广义穿戴式智能设备包括功能全、尺寸大、可不依赖智能手机实现完整或者部分的功能，例如：智能手表或智能眼镜等，以及只专注于某一类应用功能，需要和其它设备如智能手机配合使用，如各类进行体征监测的智能手环、智能首饰等。
此外，在本申请实施例中，终端设备还可以是IoT系统中的终端设备，IoT是未来信息技术发展的重要组成部分，其主要技术特点是将物品通过通信技术与网络连接，从而实现人机互连，物物互连的智能化网络。在本申请实施例中，IOT技术可以通过例如窄带(narrow band，NB)技术，做到海量连接，深度覆盖，终端省电。
此外，在本申请实施例中，终端设备还可以包括智能打印机、火车探测器、加油站等传感器，主要功能包括收集数据(部分终端设备)、接收网络设备的控制信息与下行数据，并发送电磁波，向网络设备传输上行数据。
本申请实施例中的网络设备可以是用于与终端设备通信的任意一种具有无线收发功能的通信设备。该设备包括但不限于：演进型节点B(evolved Node B，eNB)、无线网络控制器(radio network controller，RNC)、节点B(Node B，NB)、基站控制器(base station controller，BSC)、基站收发台(base transceiver station，BTS)、家庭基站(home evolved NodeB，HeNB，或home Node B，HNB)、基带单元(baseband unit，BBU)，无线保真(wireless fidelity，WIFI)系统中的接入点(access point，AP)、无线中继节点、无线回传节点、传输点(transmission point，TP)或者发送接收点(transmission and reception point，TRP)等，还可以为5G系统，如，NR系统中的gNB，或，传输点(TRP或TP)，5G系统中的基站的一个或一组(包括多个天线面板)天线面板，或者，还可以为构成gNB或传输点的网络节点，如基带单元(BBU)，或，分布式单元(distributed unit，DU)等。
在一些部署中，本申请实施例中的网络设备可以是指集中单元(central unit，CU)或者分布式单元(distributed unit，DU)或者，网络设备包括CU和DU。gNB还可以包括有源天线单元(active antenna unit，AAU)。CU实现gNB的部分功能，DU实现gNB的部分功能。比如，CU负责处理非实时协议和服务，实现无线资源控制(radio resource control，RRC)，分组数据汇聚层协议(packet data convergence protocol，PDCP)层的功能。DU负责处理物理层协议和实时服务，实现无线链路控制(radio link control，RLC)层、媒体接入控制(media access control，MAC)层和物理(physical，PHY)层的功能。AAU实现部分物理层处理功能、射频处理及有源天线的相关功能。由于RRC层的信息最 终会变成PHY层的信息，或者，由PHY层的信息转变而来，因而，在这种架构下，高层信令，如RRC层信令，也可以认为是由DU发送的，或者，由DU+AAU发送的。可以理解的是，网络设备可以为包括CU节点、DU节点、AAU节点中一项或多项的设备。此外，可以将CU划分为接入网(radio access network，RAN)中的网络设备，也可以将CU划分为核心网(core network，CN)中的网络设备，本申请对此不做限定。
进一步地，CU还可以划分为控制面的中央单元(CU-CP)和用户面的中央单元(CU-UP)。其中，CU-CP和CU-UP也可以部署在不同的物理设备上，CU-CP负责控制面功能，主要包含RRC层和PDCP-C层。PDCP-C层主要负责控制面数据的加解密，完整性保护，数据传输等。CU-UP负责用户面功能，主要包含SDAP层和PDCP-U层。其中SDAP层主要负责将核心网的数据进行处理并将流(flow)映射到承载。PDCP-U层主要负责数据面的加解密，完整性保护，头压缩，序列号维护，数据传输等至少一种功能。具体地，CU-CP和CU-UP通过通信接口(例如，E1接口)连接。CU-CP代表网络设备通过通信接口(例如，Ng接口)和核心网设备连接，通过通信接口(例如，F1-C(控制面)接口)和DU连接。CU-UP通过通信接口(例如，F1-U(用户面)接口)和DU连接。
还有一种可能的实现，PDCP-C层也包含在CU-UP中。
可以理解的是，以上关于CU和DU，以及CU-CP和CU-UP的协议层划分仅为示例，也可能有其他的划分方式，本申请实施例对此不做限定。
本申请实施例所提及的网络设备可以为包括CU、或DU、或包括CU和DU的设备、或者控制面CU节点(CU-CP节点)和用户面CU节点(CU-UP节点)以及DU节点的设备。
网络设备和终端设备可以部署在陆地上，包括室内或室外、手持或车载；也可以部署在水面上；还可以部署在空中的飞机、气球和卫星上。本申请实施例中对网络设备和终端设备所处的场景不做限定。
在本申请实施例中，终端设备或网络设备包括硬件层、运行在硬件层之上的操作系统层，以及运行在操作系统层上的应用层。该硬件层包括中央处理器(central processing unit，CPU)、内存管理单元(memory management unit，MMU)和内存(也称为主存)等硬件。该操作系统可以是任意一种或多种通过进程(process)实现业务处理的计算机操作系统，例如，Linux操作系统、Unix操作系统、Android操作系统、iOS操作系统或windows操作系统等。该应用层包含浏览器、通讯录、文字处理软件、即时通信软件等应用。
另外，本申请的各个方面或特征可以实现成方法、装置或使用标准编程和/或工程技术的制品。本申请中使用的术语“制品”涵盖可从任何计算机可读器件、载体或介质访问的计算机程序。例如，计算机可读介质可以包括，但不限于：磁存储器件(例如，硬盘、软盘或磁带等)，光盘(例如，压缩盘(compact disc，CD)、数字通用盘(digital versatile disc，DVD)等)，智能卡和闪存器件(例如，可擦写可编程只读存储器(erasable programmable read-only memory，EPROM)、卡、棒或钥匙驱动器等)。另外，本文描述的各种存储介质可代表用于存储信息的一个或多个设备和/或其它机器可读介质。术语“机器可读存储介质”可包括但不限于，无线信道和能够存储、包含和/或承载指令和/或数据的各种其它介质。
为便于理解本申请实施例，首先以图1中示出的通信系统为例详细说明适用于本申请 实施例的通信系统。图1是适用于本申请实施例的用于切换的方法的通信系统100的示意图。如图1所示，该通信系统100可以包括至少一个网络设备，例如图1所示的网络设备110；该通信系统100还可以包括至少一个终端设备，例如图1所示的终端设备120。网络设备110与终端设备120可通过无线链路通信。各通信设备，如网络设备110或终端设备120，均可以配置多个天线。对于该通信系统100中的每一个通信设备而言，所配置的多个天线可以包括至少一个用于发送信号的发射天线和至少一个用于接收信号的接收天线。因此，该通信系统100中的各通信设备之间，如网络设备110与终端设备120之间，可通过多天线技术通信。
应理解，图1仅为便于理解而示例的简化示意图，该通信系统100中还可以包括其他网络设备或者还可以包括其他终端设备，图1中未予以画出。
为便于理解本申请实施例，对本申请实施例中涉及的几个基本概念做简单说明。应理解，下文中所介绍的基本概念是以NR协议中规定的基本概念为例进行简单说明，但并不限定本申请实施例只能够应用于NR系统。因此，以NR系统为例描述时出现的标准名称，都是功能性描述，具体名称并不限定，仅表示设备的功能，可以对应的扩展到其它系统，比如2G、3G、4G或未来通信系统中。
1、CHO机制。
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进行切换。具体的，源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。
上述的切换消息可以是无线资源控制(radio resource control，RRC)消息，具体的，NR系统中该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；LTE系统中该RRC消息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。
以NR系统为例，进一步地，上述的切换消息中包括目标小区的相关信息以及终端设备接入该目标小区所需的相关配置参数。其中，目标小区的信息可以是目标小区的物理小区标识(physical cell identifier，PCI)、目标小区的小区全球标识(cell global identifier，CGI)、目标小区对应的频率信息、或目标小区为终端设备分配的小区无线网络临时标识(cell radio network temporary identifier，C-RNTI)，目标小区对应的频率信息可以包括以下一项或多项：同步信号(synchronization signal block，SSB)的绝对频率(例如，absoluteFrequencySS)、参考资源模块(common RB0)的绝对频率位置(例如，absoluteFrequencyPointA)、频率带宽列表(例如，frequencyBandList)、子载波间隔(subcarrier spacing，SCS)特定的载波列表(例如，scs-SpecificCarrierList)等；
终端设备接入该目标小区所需的相关配置参数可以包含接入目标小区所需的随机接入信道(random access channel，RACH)资源信息(例如，专用RACH资源和/或公共RACH资源等)。
具体地，终端设备在接收到切换消息后，可以根据切换消息中包含的信息，接入目标小区。由此可知，切换消息的成功发送是保证传统切换机制下终端设备成功进行切换的必要条件。然而，在LTE系统或NR系统中，信道质量的快速衰减、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，采用条件切换机制的切换方法可以提升切换成功率，如图2所示，图2是本申请实施例提供的一种CHO方法示意图。执行主体主要包括终端设备和网络设备。
该CHO方法至少包括以下部分步骤。
S210，源网络设备向终端设备发送CHO配置信息。
具体地，源网络设备在源小区和该终端设备之间的无线链路(例如，可以称为源链路)质量较好时向终端设备发送RRC消息(如RRC重配置消息)，该RRC消息中可以包含至少一个候选小区对应的CHO配置信息，该CHO配置信息中可以包括CHO触发条件(也可以称为执行条件)信息、候选小区的信息。候选小区的信息可以包括以下至少一项：候选小区为终端设备分配的C-RNTI、接入候选小区所需的RACH资源信息、候选小区的CGI、候选小区的PCI、候选小区对应的频率信息；CHO执行条件信息可以包括CHO执行事件类型和相应的参数(如CHO执行的门限值、触发时间、迟滞值等)，CHO执行事件类型可以包括事件B1、事件B2、事件A3、事件A4、事件A5或其他事件类型等。不同的候选小区对应的CHO执行条件可以相同，也可以不同，本申请对此不做限定。
终端设备在接收到该包含CHO配置信息的RRC消息后，根据该CHO配置信息判断至少一个候选小区是否满足CHO执行条件，将满足CHO执行条件的某候选小区作为目标小区，即图2所示的方法流程还包括S220，终端设备确定目标小区。
终端设备确定出目标小区之后，终端设备可以与确定出的目标小区进行随机接入过程，即图2所示的方法流程还包括S230，终端设备发起随机接入。
当随机接入成功完成，终端设备给目标小区所属的网络设备(即目标网络设备，如图2中的候选网络设备#1)发送RRC消息(例如，RRC重配置完成消息)，通知目标网络设备条件切换完成，即图2所示的方法流程还包括S240，终端设备向候选网络设备#1(即目标网络设备)发送RRC消息。可选的，上述的随机接入过程S230可以跳过不执行，例如，当包含CHO配置信息的RRC消息中包含至少一个候选小区对应的RACH-less信息(如TA信息、UL grant信息等时)时，RACH流程可跳过不执行，即终端设备确定出目标小区后，可以直接给目标网络设备发送RRC重配置完成消息。
应理解，在源网络设备执行上述的S210之前，源网络设备会向终端设备发送RRC重配置消息，该RRC重配置消息中包括测量配置信息，指示终端设备测量邻区质量，终端设备执行测量之后将测量的结果上报给源网络设备，源网络设备向至少一个候选网络设备(即候选小区所属的网络设备)发送请求消息(如该请求消息可以是切换请求消息)，该请求消息用于请求候选网络设备为CHO流程做准备(如，准备/配置上述的“候选小区的信息”)，并可以从候选网络设备接收响应消息(如该响应消息可以是切换请求响应消息)，即图2所示的方法流程还包括如图2中所示的S211～S216六个步骤。可以理解的是，源网络设备和候选网络设备可以是同一网络设备，也可以是不同网络设备，如果源网络设备和候选网络设备是同一网络设备，源网络设备和候选网络设备之间可以不进行信令交互。例如，源网络设备和候选网络设备#1是同一网络设备，则S213和S214可以省略。此处仅为举例，并不限于此。
如上所述，CHO机制中，由于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CHO配置信息，保证了该CHO配置信息的发送成功率，进而提高切换的成功率。
2、目标小区的确定。
图2所示的CHO机制中，终端设备接收到CHO配置信息之后，需要确定出目标小区。具体地，CHO机制中源网络设备可以配置一个或多个候选小区。终端设备接收到CHO配置信息后，进行CHO执行条件是否满足的判断。
作为一种可能的实现方式，假设对应候选小区A，配置的CHO执行事件类型是A3事件，且配置的对应的门限值为第一阈值(例如，为补偿(offset)dB)，则当候选小区A的小区信号质量比服务小区的小区信号质量大于或者等于第一阈值时，可以认为候选小区A满足CHO执行条件，该候选小区A可以被确定为目标小区；
作为另一种可能的实现方式，假设对应候选小区B，若配置的CHO执行事件类型是A5事件，且配置的对应的门限值为第二阈值、第三阈值，则当候选小区B的小区信号质量高于第二阈值，且服务小区的小区信号质量低于第三阈值时，可以认为候选小区B满足CHO执行条件，该候选小区B可以被确定为目标小区。
进一步地，如果CHO配置信息中包含触发时间(time to trigger，TTT)，该TTT可以是小区粒度的，即不同的候选小区对应的TTT可以相同或不同，例如，CHO配置信息中可以包含一个或多个TTT，候选小区与TTT之间可以是一对一、或者多对一、或者一对多的对应关系，每个候选小区对应的TTT可以相同或不同，本申请对此不做限定。则当且仅当在某候选小区对应的TTT内，该候选小区始终满足CHO执行条件(例如，在TTT内，该候选小区的信号质量始终满足A3事件触发条件)，则终端设备可以判定该候选小区满足CHO执行条件。
可选地，如果存在多个候选小区均分别满足各自对应的CHO执行条件，终端设备可以按照某一规则从该多个满足CHO执行条件的候选小区中选择一个小区作为目标小区，例如，将满足CHO执行条件的多个候选小区中的小区信号质量最高的小区确定为目标小区，或者，将满足CHO执行条件的多个候选小区中的优先级最高(如频率优先级最高)的小区确定为目标小区，或者将满足CHO执行条件的多个候选小区中拥有最多优良波束(优良波束指的是波束的信号质量高于某预定门限值，该预定门限值可以携带在包含CHO配置信息的RRC消息中，或者是协议约定的，本申请对此不做限定)的小区确定为目标小区，或者是将满足CHO执行条件的多个候选小区中的任一小区确定为目标小区，或者通过其他方式确定目标小区。
应理解，移动通信系统在设计之初主要针对地面终端设备，当终端设备的高度高于基站时，将会产生干扰增多和频繁切换的问题。以终端设备为无人机(aerial UE)为例，当无人机的飞行高度高于基站时，无人机接入网络进行通信会产生以下问题：
问题一、基站信号的辐射方向主要朝向地面，虽然会有地面信号的反射或者散射导致部分信号扩散向空中，或者基站天线也会有一些旁瓣向空中辐射，但总的来说，无人机接收到的信号强度会比较低。
问题二、无人机处于高空飞行时，由于遮挡物变少，无人机可能会接收到很多邻站发出的信号，导致下行干扰严重。
因此，针对无人机的移动场景，上述的CHO机制可以提高无人机的切换成功率、可靠性。CHO机制在无人机的移动场景中的应用可以依赖无人机的飞行路径。下面简单介绍本申请中涉及的无人机的飞行路径上报。
3、无人机的飞行路径上报。
网络设备可以给无人机发送终端设备信息请求(UEInformationRequest)消息，该消息用于请求无人机上报飞行路径信息。
可选的，该请求消息中可以包含无人机最多可以上报的航路点/坐标点的个数(如N)，以及是否需要上报时间戳信息。无人机接收到该请求消息后，给网络设备回复终端设备信息响应(UEInformationResponse)消息，该响应消息中可以包含一个或多个航路点/坐标点的位置信息(例如，位置信息可以包括经度信息、纬度信息、高度信息)，以及无人机经过各航路点/坐标点时所对应的时间戳信息(例如，时间戳信息可以包括绝对时间信息或相对时间信息)。其中，时间戳信息也可以是根据请求消息中是否需要上报时间戳信息来上报，如果请求消息中不需要上报时间戳信息，也可以不上报。
对于无人机，处在不同的空中高度时，无人机可以检测到的小区是不一样的。如图3所示，图3是本申请实施例提供的一种无人机检测到的小区示意图。从图3中可以看出，当无人机所处的高度为H1时，可以检测到的小区为(cell#1、cell#2、cell#3、cell#4以及cell#5)；当无人机的高度为H2时，可以检测到的小区为(cell#1、cell#3、cell#5)。本申请提供的用于切换的方法能够在无人机场景中采用CHO机制，提高无人机进行小区切换的成功率。但是应理解本申请实施例提供的用于切换的方法并不限于无人机场景中。
此外，为了便于理解本申请实施例，做出以下几点说明。
第一，在本申请中，“用于指示”可以包括用于直接指示和用于间接指示。当描述某一指示信息用于指示A时，可以包括该指示信息直接指示A或间接指示A，而并不代表该指示信息中一定包括有A。
将指示信息所指示的信息称为待指示信息，则具体实现过程中，对待指示信息进行指示的方式有很多种。例如但不限于，可以直接指示待指示信息，如待指示信息本身或者该待指示信息的索引等。也可以通过指示其他信息来间接指示待指示信息，其中该其他信息与待指示信息之间存在关联关系。还可以仅仅指示待指示信息的一部分，而待指示信息的其他部分则是已知的或者提前约定的。例如，还可以借助预先约定(例如协议规定)的各个信息的排列顺序来实现对特定信息的指示，从而在一定程度上降低指示开销。同时，还可以识别各个信息的通用部分并统一指示，以降低单独指示同样的信息而带来的指示开销。
第二，在本申请中第一、第二以及各种数字编号(例如，“#1”、“#2”)仅为描述方便进行的区分，并不用来限制本申请实施例的范围。例如，区分不同的信息等。
第三，在本申请中，“预设的”可包括由网络设备信令指示，或者预先定义，例如，协议定义。其中，“预先定义”可以通过在设备(例如，包括终端设备和网络设备)中预先保存相应的代码、表格或其他可用于指示相关信息的方式来实现，本申请对于其具体的实现方式不做限定。
第四，本申请实施例中涉及的“保存”，可以是指的保存在一个或者多个存储器中。所述一个或者多个存储器，可以是单独的设置，也可以是集成在编码器或者译码器，处理器、或通信装置中。所述一个或者多个存储器，也可以是一部分单独设置，一部分集成在译码器、处理器、或通信装置中。存储器的类型可以是任意形式的存储介质，本申请并不对此限定。
第五，本申请实施例中涉及的“协议”可以是指通信领域的标准协议，例如可以包括LTE协议、NR协议以及应用于未来的通信系统中的相关协议，本申请对此不做限定。
上文结合图1简单介绍了本申请实施例提供的用于切换的方法能够应用的场景，以及介绍了本申请实施例中可能涉及到的基本概念，下面将结合附图详细说明本申请实施例提供的用于切换的方法。
应理解，本申请实施例提供的用于切换的方法可以应用于通过多天线技术通信的系统，例如，图1中所示的通信系统100。该通信系统可以包括至少一个网络设备和至少一个终端设备。网络设备和终端设备之间可通过多天线技术通信。
还应理解，下文示出的实施例并未对本申请实施例提供的方法的执行主体的具体结构特别限定，只要能够通过运行记录有本申请实施例的提供的方法的代码的程序，以根据本申请实施例提供的方法进行通信即可，例如，本申请实施例提供的方法的执行主体可以是终端设备或网络设备，或者，是终端设备或网络设备中能够调用程序并执行程序的功能模块。
以下，不失一般性，以网络设备与终端设备之间的交互为例详细说明本申请实施例提供的用于切换的方法。
图4是本申请实施例提供的一种用于切换的方法示意性流程图。该流程图中执行主体包括终端设备和网络设备。
该用于切换的方法至少包括以下部分步骤。
S410，终端设备向网络设备发送路径信息。其中，网络设备可以是源网络设备。
作为一种可能的实现方式，终端设备向网络设备发送路径信息可以是：终端设备接收到网络设备向发送的UEInformationRequest消息，该UEInformationRequest用于请求终端设备上报路径信息；终端设备向网络设备回复终端设备信息响应(UEInformationResponse)消息，其中，该响应消息中包括该终端设备的路径信息。
作为另一种可能的实现方式，终端设备向网络设备发送路径信息可以是：终端设备周期性主动向网络设备上报路径信息。
作为又一种可能的实现方式，终端设备向网络设备发送路径信息可以是：终端设备进入连接态时向网络设备上报自身的路径信息，例如，在RRC建立请求消息或RRC建立完成消息中包含自身的路径信息。
作为又一种可能的实现方式，终端设备向网络设备发送路径信息可以是：终端设备在接收到网络设备发送的包含测量配置信息的RRC消息后，向网络设备上报自身的路径信息。
作为又一种可能的实现方式，终端设备向网络设备发送路径信息可以是：终端设备随机向网络设备上报自身的路径信息。作为一种可能的实现方式，终端设备可以通过UEInformationResponse消息，或RRC建立完成消息，或RRC重配置完成消息，或RRC重建立完成消息，或RRC恢复完成消息，或其他用于发送路径信息的信令，在终端设备和网络设备之间传输路径信息。
本申请实施例中对于终端设备如何向网络设备上报路径信息，以及在何种情况下会向网络设备上报路径信息不做限制，可以参考目前协议中的规定也可以参考通信技术发展以后未来协议中的规定。
上述的终端设备为无人机的场景下，本申请实施例中终端设备的路径信息也可以称为终端设备的航线信息。本申请实施例中对于终端设备向网络设备发送的路径信息的具体名称并不限制，只是从功能上限定该终端设备的路径信息可以指示该终端设备已经位于的、即将位于的、或正在位于的位置的坐标。
例如，以无人机为例说明终端设备如何上报路径信息。无人机上报路径信息可以参考目前协议中的规定，一种示例，无人机接收到网络设备发送的UEInformationRequest消息，后，给网络设备回复UEInformationResponse消息，该响应消息中可以包括多个坐标点的位置信息，和/或，无人机的水平飞行速度，和/或，无人机的垂直飞行速度。
可选地，路径信息可以包括坐标点的位置信息，例如，经度信息、纬度信息、高度信息等；路径信息还可以包括终端设备位于该坐标点时所对应的时间戳信息，时间戳信息可以包括绝对时间信息和/或相对时间，例如，北京时间、世界统一时间(coordinated universal time，UTC)、或欧洲时间，或其他时间，本申请对此不作限定。
S420，网络设备向终端设备发送第一小区对应的CHO配置信息。
网络设备获知上述的路径信息之后，网络设备能够基于该路径信息和实际的网络部署情况将该路径信息转变为小区信息，基于该小区信息确定至少一个第三小区。其中，网络设备获知上述的路径信息可以是从本地存储中读取该路径信息(例如，上述S410中网络设备获得路径信息之后将该信息保存在本地，需要使用该路径信息的情况下从本地存储中直接读取即可)，或者还可以是在需要该路径信息时请求终端设备上报该路径信息。
一种可能的实现方式，网络设备可以将路径信息中的坐标点对应的三维位置信息转变为小区相关的信息(如，PCI、频点信息、CGI或ECGI等)，基于转变得到的小区相关的信息网络设备能够确定至少一个第三小区。其中，坐标点对应的三维位置信息转变为小区相关的信息可以是根据坐标点对应的三维位置信息确定坐标点附近可能存在的小区的相关的信息。
进一步地，源网络设备可以将上述至少一个第三小区中的全部或者部分小区作为第四小区，第四小区可以包含一个或多个小区。进一步地，进行CHO流程的切换准备后，例如，源网络设备与至少一个第四小区分别所属的网络设备分别进行切换准备后，可以从第四小区中获取到第一小区(或者说获取到第一小区对应的CHO配置信息)，其中，第一小区可以包含一个或多个小区，第一小区也可以称为候选小区。然后，源网络设备可以将第一小区对应的CHO配置信息发送给终端设备。
应理解，上述的第一小区可以为多个，即源网络设备基于接收到的路径信息以及实际的网络部署情况等能够确定的第三小区有多个，而源网络设备将第三小区中的部分或全部小区作为第四小区(如第四小区可以为多个)，并与第四小区进行切换准备后，可以确定出一个或多个第一小区，并向终端设备发送该至少一个第一小区对应的CHO配置信息。
例如，源网络设备基于终端设备上报的路径信息和实际的网络部署情况确定N个第三小区，并将N个第三小区中的P个小区作为第四小区，切换准备流程完成后，可以将P个小区中的M个小区作为第一小区，其中，N、P、M为正整数，M小于或者等于P，P小于或等于N。
作为一种可能的实现方式，上述的第一小区(如上述的M个小区)对应的CHO配置信息可以包含在RRC消息中发送给终端设备。其中，该RRC消息可以是新定义的RRC 消息，也可以复用目前协议中规定的RRC消息，本申请实施例对此不做限定。例如，NR系统中该RRC消息可以是RRC重配置消息；LTE系统中该RRC消息可以是RRC连接重配置消息。
作为另一种可能的实现方式，上述的第一小区对应的CHO配置信息可以包含在其他新增或者已有的信令中发送给终端设备。
第一小区对应的CHO配置信息中包括CHO执行条件信息。CHO执行条件信息也可以称为CHO触发条件信息，CHO执行条件信息可以包括CHO触发事件类型和相应的参数(如TTT、门限值、迟滞值等)，CHO触发事件类型可以包括事件B1、事件B2、事件A3、事件A4、事件A5或其他触发事件类型等。不同的第一小区对应的CHO执行条件可以相同，也可以不同，参考目前协议中对于CHO执行条件的描述即可，本申请对此不做限定。
第一小区对应的CHO配置信息中还可以包括以下至少一项：第一小区为终端设备分配的C-RNTI、终端设备接入第一小区所需的资源信息、第一小区对应的索引信息、第一小区的标识信息、所述第一小区的频率信息、第一小区对应的物理层配置参数、MAC层配置参数、RLC层配置参数、PDCP层配置参数、SDAP层配置参数、或RRC层配置参数等。其中，第一小区对应的索引信息可以是测量标识和/或条件切换配置标识(conditional handover configuration identifier，CHO-ConfigId)。第一小区的标识信息可以是物理小区标识(physical cell identifier，PCI)或小区全球标识(cell global identifier，CGI)或E-UTRAN小区全球标识(E-UTRAN cell global identifier，ECGI)。第一小区为终端设备分配的C-RNTI包括多个第一小区分别为终端设备分配的C-RNTI，第一小区为终端设备分配的标识包括多个第一小区分别为终端设备分配的标识，终端设备接入第一小区所需的资源信息包括终端设备分别接入多个第一小区所需的资源信息(或者可以理解为多个第一小区分别为终端设备分配的接入其所需的资源信息)。
本申请中对于第一小区对应的CHO配置信息中具体包括的信息内容并不限定可以参考目前协议的规定。具体地，第一小区为多个的情况下，第一小区对应的CHO配置信息包括多个第一小区分别对应的CHO配置信息，该多个第一小区分别对应的CHO配置信息可以通过一条消息发送给终端设备，也可以通过多条消息发送给终端设备。
可选地，不同的高度或者高度区间对应不同的第一小区。其中，高度可以是终端设备相对于地面的高度，或者，高度可以是终端设备相对于海平面的高度，或者，高度可以是终端设备相对于某个参考点的高度，本申请对此不作限定。具体地，除了路径信息中的三维信息，网络设备还可以结合路径信息，确定不同的高度(或高度区间)所对应的一个或多个第一小区。
应理解，第一小区为统称，可能有多个小区称为第一小区，则不同的高度或者高度区间对应不同的第一小区可以理解为不同的高度或高度区间对应的小区完全不同；或者，也可以理解为不同的高度或高度区间对应的小区不完全相同，例如，不同的高度或高度区间对应的第一小区中有部分小区是相同的，有部分小区是不同的，此时，也称为不同的高度或高度区间对应的第一小区不同。
进一步地，所述第一小区对应的CHO配置信息是与高度相关的，例如，所述第一小区对应的CHO配置信息是高度粒度的或高度区间粒度的。即针对不同的高度(或高度区 间)，网络可以提供不同的CHO配置信息(例如，提供多个高度分别对应的多个上述第一小区对应的CHO配置信息)，此时，对于不同的高度或高度区间分别配置的一个或多个第一小区，可能全部不相同，或者部分相同部分不同，且，对于不同的高度或高度区间，即使多个第一小区中有部分小区相同，这些相同的小区对应的CHO配置信息也可以相同或不同，本申请对此不做限定。
该多个不同的第一小区对应的CHO配置信息可以包含在RRC消息中，该RRC消息中还可以包括高度门限值(如H1、H2)或高度区间信息(如[H3,H4]，[H5,H6])，且高度门限值(或高度区间)与多个不同的第一小区对应的CHO配置信息之间存在对应关系。
例如，网络设备发送给终端设备的RRC消息中包含H1、H2、第一小区对应的CHO配置信息config#1(例如，config#1中包含cell#2对应的config#1a、cell#4对应的config#1b)、第一小区对应的CHO配置信息config#2(例如，config#2中包含cell#1对应的config#2a、cell#2对应的config#2b、cell#3对应的config#2c、cell#4对应的config#2d、cell#5对应的config#2e)、第一小区对应的CHO配置信息config#3(例如，config#3中包含cell#1对应的config#3a、cell#3对应的config#3b、cell#5对应的config#3c)，其中，第一小区对应的CHO配置信息config#1对应于高度低于H1、第一小区对应的CHO配置信息config#2对应于高度高于或等于H1且低于或等于H2、第一小区对应的CHO配置信息config#3对应于高度高于H2。终端设备接收到网络设备发送的上述RRC消息后，可以根据自身的高度，确定出进行CHO执行条件是否满足的判断过程时可以使用的CHO配置信息，一种示例，当飞行高度低于H1时，终端设备可以使用config#1；当飞行高度高于或等于H1且低于或等于H2时，终端设备可以使用config#2；当飞行高度高于H2时，终端设备可以使用config#3。进一步地，终端设备确定出CHO执行条件是否满足的判断过程中可以使用的CHO配置信息后，进行后续流程(如，判断CHO执行条件是否满足、确定目标小区、尝试接入目标小区等)。例如，如果终端设备的高度低于H1，则终端设备根据config#1，进行后续流程；如果终端设备的高度高于或等于H1且低于或等于H2，则终端设备根据config#2，进行后续流程；如果终端设备的高度高于H2，则终端设备根据config#3，进行后续流程。
终端设备确定出进行CHO执行条件是否满足的判断过程中可以使用的CHO配置信息(或该可以使用的CHO配置信息对应的候选小区)之后，能够基于该确定出的CHO配置信息进行目标小区的确定。其中，该确定出的CHO配置信息是包含在第一小区对应的CHO配置信息中的。即图4所示的方法流程还包括：S430，终端设备确定目标小区，确定出的目标小区属于候选小区，且目标小区满足CHO执行条件。本申请实施例中，目标小区指的是终端设备尝试切换至/接入的小区，源小区指的是切换之前为终端设备提供服务的小区。
可选地，上述第一小区中包括一个或者多个满足与之相对应的CHO执行条件的第二小区，或者，
终端设备接收到包括与高度区间相对应的CHO配置信息的RRC消息后，结合自身的高度，确定出可以使用的CHO配置信息(或者说，确定该可以使用的CHO配置信息对应的第五小区)；再根据该可以使用的CHO配置信息，确定出该第五小区中满足CHO执行条件的小区(如第二小区)。
终端设备确定目标小区包括：终端设备从上述的一个或者多个满足对应的CHO执行条件的第二小区中确定目标小区。
作为一种可能的实现方式，终端设备可以随机从一个或者多个第二小区中确定目标小区。
作为另一种可能的实现方式，终端设备基于终端设备相对于源小区的距离变化趋势从多个第二小区中确定目标小区。即多个第二小区都分别满足CHO执行条件时，终端设备可以根据自身的飞行方向，从上述多个第二小区中确定出目标小区。
例如，当终端设备相对于源小区的距离变大时，终端设备从多个第二小区中选择距离源小区最远的小区为目标小区；或者，
当终端设备相对于源小区的距离变小时，终端设备从多个第二小区中选择距离源小区最近的小区为目标小区。
可选地，第一小区对应的CHO配置信息中还包括距离信息，该距离信息指示第一小区与源小区之间的距离。
用于表示第一小区(第一小区中可以包含一个或多个小区)与源小区之间的距离信息可以有多种表示形式，例如，表示第一小区与源小区之间的距离长度，或者，表示第一小区与源小区之间的距离远近的等级信息。本申请对指示信息的具体表现形式并不限定，终端设备能够基于该指示信息确定第一小区与源小区之间的距离的远近程度即可。
可选地，上述的等级信息可以用二进制数值来表示。例如，如果配置了3个第一小区，则层级信息可以用2比特的二进制数值来表示；如果配置了5个第一小区，则层级信息可以用3比特的二进制数值来表示。一种具体的表示方式为，距离源小区最近的第一小区可以表示为0等级，以此类推，即等级数越小，表示距离源小区的距离越近；或者反之，距离源小区最远的候选小区可以表示为0等级，以此类推，即等级数越小，表示距离源小区的距离越远。可选地，等级信息与距离远近的映射关系(例如，二进制数值(或等级数)越小，表示距离源小区的距离越近还是表示距离源小区的距离越远)可以通过协议约定或网络设备指示，本申请实施例对此不做限定。应理解，等级信息用二进制数值来表示只是举例，对本申请的保护范围不构成任何限定，等级信息还可以有其他的表示形式，例如，上述的等级信息可以用八进制、十进制数值、十六进制数值来表示，本申请实施例对此不做限定。
例如，网络设备配置了3个第一小区(如cell#1、cell#2、cell#3)。3个第一小区中，cell#2离源小区最近，则层级信息可以设为“00”，cell#1离源小区次近，则层级信息可以设为“01”，cell#3离源小区最远，则层级信息可以设为“10”。网络设备给终端设备发送的包含CHO配置信息的RRC消息中，除了可以包含cell#1、cell#2、cell#3对应的CHO执行条件(这3个小区各自对应的CHO执行条件可以相同或不同)，cell#1、cell#2、cell#3分别对应的PCI，cell#1、cell#2、cell#3分别为终端设备分配的C-RNTI，接入cell#1所需的RACH资源信息，接入cell#2所需的RACH资源信息，接入cell#3所需的RACH资源信息，cell#1的索引信息和频率信息，cell#2的索引信息和频率信息，cell#3的索引信息和频率信息。可选的，该RRC消息中还可以包含cell#1、cell#2、cell#3各自对应的层级信息，例如，cell#1的层级信息为“01”，cell#2的层级信息为“00”，cell#3的层级信息为“10”。或者，可选的，该RRC消息中还可以包含cell#1、cell#2、cell#3距离源小 区的距离长度值。如果终端设备根据上述RRC消息，判断发现cell#1和cell#3均满足CHO执行条件，终端设备可以再结合自身的飞行趋势，确定出目标小区。例如，如果终端设备的飞行路线是逐渐远离源小区，则终端设备可以将cell#3确定为目标小区，如果终端设备的飞行路线是逐渐靠近源小区，则终端设备可以将cell#1确定为目标小区。
上述的各个第一小区与源小区之间的距离信息通过网络设备显式指示只是一种举例，对本申请的保护范围不构成任何限定。另一种方式中，网络设备可以隐式指示各个第一小区与源小区之间的距离信息，例如，协议规定或通过第一指示信息指示多个第一小区对应的CHO配置信息中各个第一小区的次序是按照距离源小区的距离由远到近排列的，即第一小区对应的CHO配置信息中包含的第一个小区距离源小区最远，最后一个小区距离源小区最近；或者，协议规定或通过第二指示信息指示多个第一小区对应的CHO配置信息中各个第一小区的次序是按照距离源小区的距离由近到远排列的，即第一小区对应的CHO配置信息中包含的第一个小区距离源小区最近，最后一个小区距离源小区最远。还可以是其他的隐式指示方式，这里不再赘述。
可选地，上述的第一指示信息或第二指示信息可以为1比特的信息，例如，值为0表示第一小区对应的CHO配置信息中各个第一小区的次序是按照距离源小区的距离由远到近排列；值为1表示第一小区对应的CHO配置信息中各个第一小区的次序是按照距离源小区的距离由近到远排列。应理解，指示信息为1比特的二进制数值只是举例，对本申请的保护范围不构成任何限定，指示信息还可以有其他的表示形式，例如，第一指示信息或第第二指示信息可以为布尔值或是否携带某信元，本申请实施例对此不做限定。
上述终端设备与源小区之间的距离可以理解为：终端设备与源小区之间的直线距离、终端设备与源小区之间的垂直距离、终端设备与源小区之间的水平距离等；上述第一小区与源小区之间的距离可以理解为：第一小区与源小区之间的直线距离、第一小区与源小区之间的垂直距离、第一小区与源小区之间的水平距离等。
作为又一种可能的实现方式，终端设备基于多个第二小区的信号质量变化趋势从多个第二小区中确定目标小区，其中，第二小区的信号质量变化趋势包括第二小区的信号质量在第二小区对应的TTT内的变化趋势，例如，第二小区的小区信号质量在第二小区对应的TTT内的变化趋势，和/或，属于第二小区的波束的信号质量在第二小区对应的TTT内的变化趋势。例如，目标小区为多个第二小区中信号质量变化趋势呈上升趋势的一个小区。
可选地，第一小区对应的CHO配置信息中还包括信号质量的门限值，其中，该信号质量的门限值可以包括小区的信号质量门限值(如门限值E)和/或波束的信号质量门限值(如门限值F)。如果某小区的信号质量在对应的TTT内呈现上升趋势且信号质量的变化率大于或等于信号质量的门限值，并且，该小区在与之对应的TTT内满足CHO执行条件，则该小区可以被确定为目标小区。例如，如果某小区的小区信号质量在对应的TTT内呈现上升趋势且其信号质量的变化率大于或等于小区的信号质量门限值(如E)，并且，该小区在与之对应的TTT内满足CHO执行条件，则该小区可以被确定为目标小区；或者，如果属于某小区的至少一个波束(如M个波束，M是大于或等于1的正整数，M可以是协议约定的或携带在上述包含CHO配置信息的RRC消息中)的信号质量在对应的TTT内呈现上升趋势且其信号质量的变化率大于或等于波束的信号质量门限值(如F)，并且，该小区在与之对应的TTT内满足CHO执行条件，则该小区可以被确定为目标小区；或者， 如果某小区的小区信号质量在对应的TTT内呈现上升趋势且其信号质量的变化率大于或等于小区的信号质量门限值(如E)，且，属于该小区的至少一个波束(如M个波束，M是大于或等于1的正整数，M可以是协议约定的或携带在上述包含CHO配置信息的RRC消息中)的信号质量在对应的TTT内呈现上升趋势且其信号质量的变化率大于或等于波束的信号质量门限值(如F)，并且，该小区在与之对应的TTT内满足CHO执行条件，则该小区可以被确定为目标小区。
作为又一种可能的实现方式，终端设备基于多个满足CHO执行条件的第二小区的信号质量变化趋势和终端设备相对于源小区的距离变化趋势从该多个第二小区中确定目标小区。
例如，当终端设备相对于源小区的距离变大时，终端设备从多个第二小区中选择距离源小区较远的至少一个第二小区中信号质量变化趋势呈上升趋势的一个小区为目标小区；或者，
当终端设备相对于源小区的距离变小时，终端设备从多个第二小区中选择距离源小区较近的至少一个第二小区中信号质量变化趋势呈上升趋势的一个小区为目标小区。
应理解，上述的从多个第二小区中确定目标小区的方式可以结合上述的S410和S420(即先按照S410和S420中所示的基于路径信息确定出第一小区，再按照S430中所示从第一小区中确定出目标小区)。
在又一种可能的实施例中，S420中网络设备向终端设备发送第一小区对应的CHO配置信息。这种场景下，网络设备确定第一小区可以不依据终端设备上报的路径信息在该实施例中不执行上述的S410，例如，网络设备可以按照测量报告确定第一小区终端设备接收到第一小区对应的CHO配置信息后，再按照S430中所示，从第一小区中确定出目标小区，本申请不再赘述。
上述方法实施例中，上述各过程的序列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，而不应对本申请实施例的实施过程构成任何限定。并且有可能并非要执行上述方法实施例中的全部操作。
应理解，上述方法实施例中终端设备和/或网络设备可以执行施例中的部分或全部步骤，这些步骤或操作仅是示例，本申请实施例还可以包括执行其它操作或者各种操作的变形。
还应理解，在本申请的各个实施例中，如果没有特殊说明以及逻辑冲突，不同的实施例之间的术语和/或描述可以具有一致性、且可以相互引用，不同的实施例中的技术特征根据其内在的逻辑关系可以组合形成新的实施例。
上面结合图4详细介绍了本申请实施例提供的用于切换的方法，下面结合图5-图8详细介绍本申请实施例提供的用于切换的装置。
参见图5，图5是本申请提供的用于切换的装置500的示意图。如图5所示，装置500包括处理单元510、接收单元520和发送单元530。
发送单元530，用于向网络设备发送所述终端设备的路径信息，所述路径信息用于确定第一小区。
接收单元520，用于接收来自所述网络设备的第一小区对应的条件切换CHO配置信息；
处理单元510，用于根据所述第一小区对应的CHO配置信息确定目标小区。
装置500和方法实施例中的终端设备对应，装置500可以是方法实施例中的终端设备，或者方法实施例中的终端设备内部的芯片或功能模块。装置500的相应单元用于执行图4所示的方法实施例中由终端设备执行的相应步骤。
其中，装置500中的处理单元510用于执行方法实施例中终端设备对应与处理相关的步骤。例如，执行图4中确定目标小区的步骤S430。
装置500中的接收单元520执行方法实施例中终端设备接收的步骤。例如，执行图4中接收网络设备发送第一小区对应的条件切换CHO配置信息的步骤S420。
装置500中的发送单元530，用于执行终端设备发送的步骤，例如，执行图4中向网络设备发送路径信息的步骤S410。接收单元520和发送单元530可以组成收发单元，同时具有接收和发送的功能。其中，处理单元510可以是至少一个处理器。发送单元530可以是发射器或者接口电路，接收单元520可以是接收器或者接口电路。接收器和发射器可以集成在一起组成收发器或者接口电路。
可选的，装置500还可以包括存储单元，用于存储数据和/或信令，处理单元510、发送单元、和接收单元520可以与存储单元交互或者耦合，例如读取或者调用存储单元中的数据和/或信令，以使得上述实施例的方法被执行。
以上各个单元可以独立存在，也可以全部或者部分集成。
参见图6，图6是适用于本申请实施例的用终端设备600的结构示意图。该终端设备600可应用于图1所示出的系统中。为了便于说明，图6仅示出了终端设备的主要部件。如图6所示，终端设备600包括处理器、存储器、控制电路、天线以及输入输出装置。处理器用于控制天线以及输入输出装置收发信号，存储器用于存储计算机程序，处理器用于从存储器中调用并运行该计算机程序，以执行本申请提出的用于注册的方法中由终端设备执行的相应流程和/或操作。此处不再赘述。
本领域技术人员可以理解，为了便于说明，图6仅示出了一个存储器和处理器。在实际的终端设备中，可以存在多个处理器和存储器。存储器也可以称为存储介质或者存储设备等，本申请实施例对此不做限制。
参见图7，图7是本申请提供的用于切换的装置700的示意图。如图7所示，装置700包括接收单元710和发送单元720。
接收单元710，用于接收来自终端设备的所述终端设备的路径信息，所述路径信息用于确定第一小区；
发送单元720，用于向所述终端设备发送第一小区对应的条件切换CHO配置信息。
装置700和方法实施例中的网络设备对应，装置700可以是方法实施例中的网络设备，或者方法实施例中的网络设备内部的芯片或功能模块。装置700的相应单元用于执行图4所示的方法实施例中由网络设备执行的相应步骤。
装置700中的发送单元720执行方法实施例中网络设备发送的步骤，例如，执行图4中向终端设备发送第一小区对应的条件切换CHO配置信息的步骤S420。
装置700中的接收单元710，用于执行网络设备接收的步骤。例如，接收终端设备发送路径信息的步骤S410。装置700还可以包括处理单元，用于执行网络设备内部对应与处理相关的步骤。接收单元710和发送单元720可以组成收发单元，同时具有接收和发送 的功能。其中，处理单元可以是至少一个处理器。发送单元720可以是发射器或者接口电路。接收单元710可以是接收器或者接口电路。接收器和发射器可以集成在一起组成收发器或者接口电路。
可选的，装置700还可以包括存储单元，用于存储数据和/或信令，处理单元、发送单元720、和接收单元710可以与存储单元交互或者耦合，例如读取或者调用存储单元中的数据和/或信令，以使得上述实施例的方法被执行。
以上各个单元可以独立存在，也可以全部或者部分集成。
参见图8，图8是适用于本申请实施例的网络设备800的结构示意图，可以用于实现上述寻呼的方法中的网络设备的功能。可以为网络设备的结构示意图。
一种可能的方式中，例如在5G通信系统中的某些实现方案中，网络设备800可以包括CU、DU和AAU，相比于LTE通信系统中的网络设备由一个或多个射频单元，如远端射频单元(remote radio unit，RRU)和一个或多个基带单元(base band unit，BBU)来说：
原BBU的非实时部分将分割出来，重新定义为CU，负责处理非实时协议和服务、BBU的部分物理层处理功能与原RRU及无源天线合并为AAU、BBU的剩余功能重新定义为DU，负责处理物理层协议和实时服务。简而言之，CU和DU，以处理内容的实时性进行区分、AAU为RRU和天线的组合。
CU、DU、AAU可以采取分离或合设的方式，所以，会出现多种网络部署形态，一种可能的部署形态与传统4G网络设备一致，CU与DU共硬件部署。应理解，图8只是一种示例，对本申请的保护范围并不限制，例如，部署形态还可以是DU部署在5G BBU机房，CU集中部署或DU集中部署，CU更高层次集中等。
所述AAU 801可以实现收发功能称为收发单元801，与图7中的发送单元720对应。可选地，该收发单元801还可以称为收发机、收发电路、或者收发器等，其可以包括至少一个天线8011和射频单元8012。可选地，收发单元801可以包括接收单元和发送单元，接收单元可以对应于接收器(或称接收机、接收电路)，发送单元可以对应于发射器(或称发射机、发射电路)。所述CU和DU 802可以实现内部处理功能称为处理单元802。可选地，该处理单元802可以对网络设备进行控制等，可以称为控制器。所述AAU 801与CU和DU 802可以是物理上设置在一起，也可以物理上分离设置的。
另外，网络设备不限于图8所示的形态，也可以是其它形态：例如：包括BBU和ARU，或者包括BBU和AAU；也可以为CPE，还可以为其它形态，本申请不限定。
应理解，图8所示的网络设备800能够实现图4的方法实施例中涉及的网络设备的功能。网络设备800中的各个单元的操作和/或功能，分别为了实现本申请方法实施例中由网络设备执行的相应流程。为避免重复，此处适当省略详述描述。图8示例的网络设备的结构仅为一种可能的形态，而不应对本申请实施例构成任何限定。本申请并不排除未来可能出现的其他形态的网络设备结构的可能。
本申请实施例还提供一种通信系统，其包括前述的终端设备和网络设备。
本申请还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，当该指令在计算机上运行时，使得计算机执行上述如图4所示的方法中终端设备执行的各个步骤。
本申请还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 该指令在计算机上运行时，使得计算机执行上述如图4所示的方法中网络设备执行的各个步骤。
本申请还提供了一种包含指令的计算机程序产品，当该计算机程序产品在计算机上运行时，使得计算机执行如图4所示的方法中终端设备执行的各个步骤。
本申请还提供了一种包含指令的计算机程序产品，当该计算机程序产品在计算机上运行时，使得计算机执行如图4所示的方法中网络设备执行的各个步骤。
本申请还提供一种芯片，包括处理器。该处理器用于读取并运行存储器中存储的计算机程序，以执行本申请提供的用于切换的方法中由终端设备执行的相应操作和/或流程。可选地，该芯片还包括存储器，该存储器与该处理器通过电路或电线与存储器连接，处理器用于读取并执行该存储器中的计算机程序。进一步可选地，该芯片还包括通信接口，处理器与该通信接口连接。通信接口用于接收处理的数据和/或信息，处理器从该通信接口获取该数据和/或信息，并对该数据和/或信息进行处理。该通信接口可以是该芯片上的输入/输出接口、接口电路、输出电路、输入电路、管脚或相关电路等。所述处理器也可以体现为处理电路或逻辑电路。
本申请还提供一种芯片，包括处理器。该处理器用于读取并运行存储器中存储的计算机程序，以执行本申请提供的用于切换的方法中由网络设备执行的相应操作和/或流程。可选地，该芯片还包括存储器，该存储器与该处理器通过电路或电线与存储器连接，处理器用于读取并执行该存储器中的计算机程序。进一步可选地，该芯片还包括通信接口，处理器与该通信接口连接。通信接口用于接收处理的数据和/或信息，处理器从该通信接口获取该数据和/或信息，并对该数据和/或信息进行处理。该通信接口可以是该芯片上的输入/输出接口、接口电路、输出电路、输入电路、管脚或相关电路等。所述处理器也可以体现为处理电路或逻辑电路。
上述的芯片也可以替换为芯片系统，这里不再赘述。
本申请中的术语“包括”和“具有”以及他们的任何变形，意图在于覆盖不排他的包含，例如，包含了一系列步骤或单元的过程、方法、系统、产品或设备不必限于清楚地列出的那些步骤或单元，而是可包括没有清楚地列出的或对于这些过程、方法、产品或设备固有的其它步骤或单元。
本领域普通技术人员可以意识到，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，能够以电子硬件、或者计算机软件和电子硬件的结合来实现。这些功能究竟以硬件还是软件方式来执行，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。
所属领域的技术人员可以清楚地了解到，为描述的方便和简洁，上述描述的系统、装置和单元的具体工作过程，可以参考前述方法实施例中的对应过程，在此不再赘述。
在本申请所提供的几个实施例中，应该理解到，所揭露的系统、装置和方法，可以通过其它的方式实现。例如，以上所描述的装置实施例仅仅是示意性的，例如，所述单元的划分，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，例如多个单元或组件可以结合或者可以集成到另一个系统，或一些特征可以忽略，或不执行。另一点，所显示或讨论的相互之间的耦合或直接耦合或通信连接可以是通过一些接口，装置或单元的间 接耦合或通信连接，可以是电性，机械或其它的形式。
所述作为分离部件说明的单元可以是或者也可以不是物理上分开的，作为单元显示的部件可以是或者也可以不是物理单元，即可以位于一个地方，或者也可以分布到多个网络单元上。可以根据实际的选择其中的部分或者全部单元来实现本实施例方案的目的。
另外，在本申请各个实施例中的各功能单元可以集成在一个处理单元中，也可以是各个单元单独物理存在，也可以两个或两个以上单元集成在一个单元中。
所述功能如果以软件功能单元的形式实现并作为独立的产品销售或使用时，可以存储在一个计算机可读取存储介质中。基于这样的理解，本申请的技术方案本质上或者说对现有技术做出贡献的部分或者该技术方案的部分可以以软件产品的形式体现出来，该计算机软件产品存储在一个存储介质中，包括若干指令用以使得一台计算机设备(可以是个人计算机，服务器，或者网络设备等)执行本申请各个实施例所述方法的全部或部分步骤。而前述的存储介质包括：U盘、移动硬盘、只读存储器(read-only memory，ROM)、随机存取存储器(random access memory，RAM)、磁碟或者光盘等各种可以存储程序代码的介质。
另外，本申请中术语“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；本申请中术语“至少一个”，可以表示“一个”和“两个或两个以上”，例如，A、B和C中至少一个，可以表示：单独存在A，单独存在B，单独存在C、同时存在A和B，同时存在A和C，同时存在C和B，同时存在A和B和C，这七种情况。
以上所述，仅为本申请的具体实施方式，但本申请的保护范围并不局限于此，任何熟悉本技术领域的技术人员在本申请揭露的技术范围内，可轻易想到变化或替换，都应涵盖在本申请的保护范围之内。因此，本申请的保护范围应以所述权利要求的保护范围为准。

Claims (31)

  1. 一种用于切换的方法，其特征在于，包括：
    终端设备向网络设备发送所述终端设备的路径信息，所述路径信息用于确定第一小区；
    所述终端设备接收来自所述网络设备的第一小区对应的条件切换CHO配置信息；
    所述终端设备根据所述第一小区对应的CHO配置信息确定目标小区。
  2. 如权利要求1所述的方法，其特征在于，所述第一小区对应的CHO配置信息与高度相关。
  3. 如权利要求1或2所述的方法，其特征在于，所述第一小区对应的CHO配置信息包括CHO执行条件和以下信息中的至少一种：
    所述第一小区为所述终端设备分配的小区无线网络临时标识C-RNTI、所述终端设备接入所述第一小区所需的资源信息、所述第一小区对应的索引信息、所述第一小区的标识信息、或所述第一小区的频率信息。
  4. 如权利要求3所述的方法，其特征在于，所述第一小区包括一个或多个满足对应的CHO执行条件的第二小区，所述终端设备根据所述第一小区对应的CHO配置信息确定目标小区包括：
    所述终端设备从所述一个或多个第二小区中确定所述目标小区。
  5. 如权利要求4所述的方法，其特征在于，所述终端设备从所述多个第二小区中确定所述目标小区包括：
    所述终端设备基于所述终端设备相对于源小区的距离变化趋势从所述多个第二小区中确定所述目标小区。
  6. 如权利要求5所述的方法，其特征在于，所述终端设备基于所述终端设备相对于源小区的距离变化趋势从所述多个第二小区中确定所述目标小区包括：
    当所述终端设备相对于源小区的距离变大时，所述终端设备从所述多个第二小区中选择距离所述源小区最远的小区为所述目标小区；或者，
    当所述终端设备相对于源小区的距离变小时，所述终端设备从所述多个第二小区中选择距离所述源小区最近的小区为所述目标小区。
  7. 如权利要求1-6中任一项所述的方法，其特征在于，所述第一小区对应的CHO配置信息中还包括距离信息，所述距离信息用于指示所述第一小区与所述源小区之间的距离。
  8. 如权利要求3所述的方法，其特征在于，所述终端设备从所述多个第二小区确定目标小区包括：
    所述终端设备基于所述多个第二小区的信号质量变化趋势从所述多个第二小区中确定所述目标小区，其中，所述第二小区的信号质量变化趋势包括所述第二小区的信号质量在所述第二小区对应的TTT内的变化趋势。
  9. 如权利要求8所述的方法，其特征在于，所述目标小区为所述多个第二小区中信号质量变化趋势呈上升趋势的一个小区。
  10. 如权利要求9所述的方法，其特征在于，所述第一小区对应的CHO配置信息中 还包括门限值，
    所述目标小区为所述多个第二小区中信号质量变化趋势呈上升趋势且信号质量的变化率大于或者等于所述门限值的一个小区。
  11. 一种用于切换的方法，其特征在于，包括：
    网络设备接收来自终端设备的所述终端设备的路径信息，所述路径信息用于确定第一小区；
    所述网络设备向所述终端设备发送第一小区对应的条件切换CHO配置信息。
  12. 如权利要求11所述的方法，其特征在于，所述第一小区对应的CHO配置信息与高度相关。
  13. 如权利要求11或12所述的方法，其特征在于，所述第一小区对应的CHO配置信息包括CHO执行条件和以下信息中的至少一种：
    所述第一小区为所述终端设备分配的小区无线网络临时标识C-RNTI、所述终端设备接入所述第一小区所需的资源信息、所述第一小区对应的索引信息、所述第一小区的标识信息、或所述第一小区的频率信息。
  14. 如权利要求11-13中任一项所述的方法，其特征在于，所述第一小区对应的CHO配置信息中还包括距离信息，所述距离信息用于指示所述第一小区与源小区之间的距离。
  15. 一种用于切换的装置，其特征在于，包括：
    发送单元，用于向网络设备发送所述终端设备的路径信息，所述路径信息用于确定第一小区；
    接收单元，用于接收来自所述网络设备的第一小区对应的条件切换CHO配置信息；
    处理单元，用于根据所述第一小区对应的CHO配置信息确定目标小区。
  16. 如权利要求15所述的装置，其特征在于，所述第一小区对应的CHO配置信息与高度相关。
  17. 如权利要求15或16所述的装置，其特征在于，所述第一小区对应的CHO配置信息包括CHO执行条件和以下信息中的至少一种：
    所述第一小区所述终端设备分配的小区无线网络临时标识C-RNTI、所述终端设备接入所述第一小区所需的资源信息、所述第一小区对应的索引信息、所述第一小区的标识信息、或所述第一小区的频率信息。
  18. 如权利要求17所述的装置，其特征在于，所述第一小区包括一个或多个满足对应的CHO执行条件的第二小区，所述处理单元根据所述第一小区对应的CHO配置信息确定目标小区包括：
    所述处理单元从所述一个或多个第二小区中确定所述目标小区。
  19. 如权利要求18所述的装置，其特征在于，所述处理单元从所述多个第二小区中确定所述目标小区包括：
    所述处理单元基于终端设备相对于源小区的距离变化趋势从所述多个第二小区中确定所述目标小区。
  20. 如权利要求19所述的装置，其特征在于，所述处理单元基于所述终端设备相对于源小区的距离变化趋势从所述多个第二小区中确定所述目标小区包括：
    当所述终端设备相对于源小区的距离变大时，所述处理单元从所述多个第二小区中选 择距离所述源小区最远的小区为所述目标小区；或者，
    当所述终端设备相对于源小区的距离变小时，所述处理单元从所述多个第二小区中选择距离所述源小区最近的小区为所述目标小区。
  21. 如权利要求15-20中任一项所述的装置，其特征在于，所述第一小区对应的CHO配置信息中还包括距离信息，所述距离信息用于指示所述第一小区与所述源小区之间的距离。
  22. 如权利要求21所述的装置，其特征在于，所述处理单元从所述多个第二小区确定目标小区包括：
    所述处理单元基于所述多个第二小区的信号质量变化趋势从所述多个第二小区中确定所述目标小区，其中，所述第二小区的信号质量变化趋势包括所述第二小区的信号质量在所述第二小区对应的TTT内的变化趋势。
  23. 如权利要求22所述的装置，其特征在于，所述目标小区为所述多个第二小区中信号质量变化趋势呈上升趋势的一个小区。
  24. 如权利要求23所述的装置，其特征在于，所述第一小区对应的CHO配置信息中还包括门限值，
    所述目标小区为所述多个第二小区中信号质量变化趋势呈上升趋势且信号质量的变化率大于或者等于所述门限值的一个小区。
  25. 一种用于切换的装置，其特征在于，包括：
    接收单元，用于接收来自终端设备的所述终端设备的路径信息，所述路径信息用于确定第一小区；
    发送单元，用于向所述终端设备发送第一小区对应的条件切换CHO配置信息。
  26. 如权利要求25所述的装置，其特征在于，所述第一小区对应的CHO配置信息与高度相关。
  27. 如权利要求25或26所述的装置，其特征在于，所述第一小区对应的CHO配置信息包括CHO执行条件和以下信息中的至少一种：
    所述第一小区为所述终端设备分配的小区无线网络临时标识C-RNTI、所述终端设备接入所述第一小区所需的资源信息、所述第一小区对应的索引信息、所述第一小区的标识信息、或所述第一小区的频率信息。
  28. 如权利要求25-27中任一项所述的装置，其特征在于，所述第一小区对应的CHO配置信息中还包括距离信息，所述距离信息用于指示所述第一小区与所述源小区之间的距离。
  29. 一种通信设备，其特征在于，包括：
    存储器，所述存储器用于存储计算机程序；
    收发器，所述收发器用于执行收发步骤；
    处理器，所述处理器用于从所述存储器中调用并运行所述计算机程序，使得所述通信设备执行权利要求1-14中任一项所述的方法。
  30. 一种计算机可读存储介质，其特征在于，包括：所述计算机可读介质存储有计算机程序；所述计算机程序在计算机上运行时，使得计算机执行权利要求1-14中任一项所述的方法。
  31. 一种通信系统，其特征在于，包括：
    权利要求15-24中任一项所述的用于切换的装置和权利要求25-27中任一项所述的用于切换的装置。
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CN114846844A (zh) 2022-08-02
US12349011B2 (en) 2025-07-01

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