WO2025007546A1 - 切换方法、通信设备及存储介质 - Google Patents

切换方法、通信设备及存储介质 Download PDF

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Publication number
WO2025007546A1
WO2025007546A1 PCT/CN2024/073086 CN2024073086W WO2025007546A1 WO 2025007546 A1 WO2025007546 A1 WO 2025007546A1 CN 2024073086 W CN2024073086 W CN 2024073086W WO 2025007546 A1 WO2025007546 A1 WO 2025007546A1
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WIPO (PCT)
Prior art keywords
switching
cell
central unit
ltm
terminal device
Prior art date
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PCT/CN2024/073086
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English (en)
French (fr)
Inventor
黄钧蔚
黎添
吴文
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Shenzhen Transsion Holdings Co Ltd
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Shenzhen Transsion Holdings Co Ltd
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Priority to PCT/CN2024/073086 priority Critical patent/WO2025007546A1/zh
Priority to PCT/CN2024/079427 priority patent/WO2025011043A1/zh
Publication of WO2025007546A1 publication Critical patent/WO2025007546A1/zh
Anticipated expiration legal-status Critical
Pending legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements

Definitions

  • the present application relates to the field of communication technology, and in particular to a switching method, a communication device and a storage medium.
  • the LTM (L1/L2 Triggered Mobility) switching method includes: after the terminal device reports a measurement report, the network device (such as a base station) determines to execute the switch, and then sends a switching command through the media access control signaling, and the terminal device executes the LTM switch.
  • the existing LTM switching method only supports continuous switching within the same central unit (Intra-CU, Intra-Central Unit), and does not support switching between different central units (Inter-CU, Inter-Central Unit), that is, the LTM switching mechanism is imperfect.
  • the main purpose of this application is to provide a switching method, a communication device and a storage medium, aiming to improve the LTM switching mechanism to improve the applicability of LTM switching.
  • a switching method provided by the present application can be applied to a terminal device (such as a mobile phone), comprising the steps of:
  • the method further comprises at least one of the following:
  • the cell configuration includes a central unit identifier and/or a candidate cell configuration
  • the cell configuration is configured by the first master node
  • the cell configuration is used to perform a handover to a candidate cell in at least one master node
  • LTM switching includes switching between different central units and/or switching between the same central unit.
  • the method further comprises at least one of the following:
  • the central unit identifier includes a serving cell central unit identifier and/or a candidate cell central unit identifier
  • the at least one master node includes a second master node and/or a third master node.
  • step S2 includes at least one of the following:
  • serving cell central unit identifier and the candidate cell central unit identifier are different, performing a different central unit switching
  • the serving cell central unit identifier and the candidate cell central unit identifier are the same, the same central unit switching is performed.
  • the performing of switching between different central units includes at least one of the following:
  • the method further comprises at least one of the following:
  • Control information is sent and/or received according to the updated cell radio network temporary identifier.
  • the present application also provides a switching method, which can be applied to a network device (such as a base station), comprising the steps of:
  • S1 Send the cell configuration so that the terminal device can perform LTM switching based on the cell configuration.
  • the method further comprises at least one of the following:
  • the cell configuration is sent to the terminal device via radio resource control reconfiguration signaling.
  • the method further comprises at least one of the following:
  • the cell configuration is carried in the handover request feedback and/or the handover request confirmation;
  • the cell configuration includes a central unit identifier and/or a candidate cell configuration
  • the cell configuration is used to perform a handover to a candidate cell in at least one master node
  • LTM switching includes switching between different central units and/or switching between the same central unit.
  • the central unit identifier includes a serving cell central unit identifier and/or a candidate cell central unit identifier.
  • the method further comprises at least one of the following:
  • the terminal device performs a switch between different central units
  • the terminal device performs the same central unit switching.
  • the terminal device performs switching between different central units, including at least one of the following:
  • the terminal device releases the temporary identification of the cell wireless network
  • the terminal device updates the master key
  • the terminal device releases the signaling bearer and/or data bearer configuration
  • the terminal device performs packet data convergence protocol reconstruction
  • the terminal device executes service data adaptation protocol reconfiguration
  • the terminal device performs radio link control reestablishment
  • the terminal device performs a media access control reset
  • the terminal device updates the service cell center unit identification
  • the terminal device considers the reset identifier as different
  • the terminal device performs a full configuration.
  • the present application also provides a communication device, comprising: a memory, a processor, and a switching program stored in the memory and executable on the processor, wherein the switching program implements the steps of any of the switching methods described above when executed by the processor.
  • the present application also provides a storage medium, on which a computer program is stored.
  • a computer program is stored.
  • the steps of any of the switching methods described above are implemented.
  • the technical solution of the present application improves the LTM switching mechanism by executing LTM switching based on cell configuration, so that the LTM switching mode not only supports continuous switching under the same central unit, but also supports switching between different central units, thereby improving the applicability of LTM switching.
  • FIG1 is a schematic diagram of the hardware structure of a mobile terminal for implementing various embodiments of the present application.
  • FIG2 is a diagram of a communication network system architecture provided in an embodiment of the present application.
  • FIG3 is a schematic diagram of a hardware structure of a controller 140 provided in the present application.
  • FIG4 is a schematic diagram of the hardware structure of a network node 150 provided in the present application.
  • FIG5 is a schematic flow chart of a switching method according to the first embodiment
  • FIG6 is a schematic flow chart of a processing method according to a second embodiment
  • FIG7 is a schematic flow chart of a switching method according to a sixth embodiment.
  • FIG8 is a schematic diagram of an interaction sequence according to a seventh embodiment
  • FIG9 is a first structural diagram of a switching device provided in an embodiment of the present application.
  • FIG10 is a second structural schematic diagram of a switching device provided in an embodiment of the present application.
  • FIG. 11 is a schematic diagram of the structure of a communication device provided in an embodiment of the present application.
  • first, second, third, etc. may be used to describe various information in this article, these information should not be limited to these terms. These terms are only used to distinguish the same type of information from each other.
  • first information may also be referred to as the second information
  • second information may also be referred to as the first information.
  • word “if” as used herein can be interpreted as “at the time of” or “when” or “in response to determination”.
  • singular forms “one”, “one” and “the” are intended to also include plural forms, unless there is an opposite indication in the context.
  • “comprising at least one of the following: A, B, C” means “any of the following: A; B; C; A and B; A and C; B and C; A and B and C”, and for another example, “A, B or C” or “A, B and/or C” means “any of the following: A; B; C; A and B; A and C; B and C; A and B and C”.
  • An exception to this definition will only occur when a combination of elements, functions, steps or operations are inherently mutually exclusive in some manner.
  • the words “if” and “if” may be interpreted as “at the time of” or “when” or “in response to determining” or “in response to detecting”, depending on the context.
  • the phrases “if it is determined” or “if (stated condition or event) is detected” may be interpreted as “when it is determined” or “in response to determining” or “when detecting (stated condition or event)” or “in response to detecting (stated condition or event)", depending on the context.
  • step codes such as S1 and S2 are used for the purpose of expressing the corresponding content more clearly and concisely, and do not constitute a substantial limitation on the order.
  • S2 first and then S1, etc., but these should all be within the scope of protection of this application.
  • module means, “component” or “unit” used to represent elements are only used to facilitate the description of the present application, and have no specific meanings. Therefore, “module”, “component” or “unit” can be used in a mixed manner.
  • the communication device in this application can be a terminal device (such as a mobile phone) or a network device (such as a base station).
  • a terminal device such as a mobile phone
  • a network device such as a base station
  • the terminal device may be implemented in various forms.
  • the terminal device described in this application may include a mobile phone, a tablet computer, a laptop computer, a PDA, a portable media player (PMP), a navigation device, a wearable device, a smart bracelet, a computer, a Smart terminal devices such as pedometers, as well as fixed terminal devices such as digital TVs and desktop computers.
  • PDA portable media player
  • PMP portable media player
  • navigation device a wearable device
  • smart bracelet a computer
  • Smart terminal devices such as pedometers
  • fixed terminal devices such as digital TVs and desktop computers.
  • FIG. 1 is a schematic diagram of the hardware structure of a mobile terminal for implementing various embodiments of the present application.
  • the mobile terminal 100 may include: an RF (Radio Frequency) unit 101, a WiFi module 102, an audio output unit 103, an A/V (audio/video) input unit 104, a sensor 105, a display unit 106, a user input unit 107, an interface unit 108, a memory 109, a processor 110, and a power supply 111.
  • RF Radio Frequency
  • the radio frequency unit 101 can be used for receiving and sending signals during information transmission or communication. Specifically, after receiving the downlink information of the base station, it is sent to the processor 110 for processing; in addition, the uplink data is sent to the base station.
  • the radio frequency unit 101 includes but is not limited to an antenna, at least one amplifier, a transceiver, a coupler, a low noise amplifier, a duplexer, etc. And/or, the radio frequency unit 101 can also communicate with the network and other devices through wireless communication.
  • the above-mentioned wireless communications may use any communication standard or protocol, including but not limited to GSM (Global System of Mobile communication), GPRS (General Packet Radio Service), CDMA2000 (Code Division Multiple Access 2000), WCDMA (Wideband Code Division Multiple Access), TD-SCDMA (Time Division-Synchronous Code Division Multiple Access), FDD-LTE (Frequency Division Duplexing-Long Term Evolution), TDD-LTE (Time Division Duplexing-Long Term Evolution), 5G NR (New Radio) and 6G, etc.
  • GSM Global System of Mobile communication
  • GPRS General Packet Radio Service
  • CDMA2000 Code Division Multiple Access 2000
  • WCDMA Wideband Code Division Multiple Access
  • TD-SCDMA Time Division-Synchronous Code Division Multiple Access
  • FDD-LTE Frequency Division Duplexing-Long Term Evolution
  • TDD-LTE Time Division Duplexing-Long Term Evolution
  • 5G NR New Radio
  • WiFi is a short-range wireless transmission technology.
  • the mobile terminal can help users send and receive emails, browse web pages, and access streaming media through the WiFi module 102, which provides users with wireless broadband Internet access.
  • FIG1 shows the WiFi module 102, it is understandable that it is not a necessary component of the mobile terminal and can be omitted as needed without changing the essence of the invention.
  • the audio output unit 103 can convert the audio data received by the RF unit 101 or the WiFi module 102 or stored in the memory 109 into an audio signal and output it as sound when the mobile terminal 100 is in a call signal reception mode, a talk mode, a recording mode, a voice recognition mode, a broadcast reception mode, etc. Moreover, the audio output unit 103 can also provide audio output related to a specific function performed by the mobile terminal 100 (for example, a call signal reception sound, a message reception sound, etc.). The audio output unit 103 may include a speaker, a buzzer, etc.
  • the A/V input unit 104 is used to receive audio or video signals.
  • the A/V input unit 104 may include a graphics processor (GPU) 1041 and a microphone 1042, and the graphics processor 1041 processes the image data of a static picture or video obtained by an image capture device (such as a camera) in a video capture mode or an image capture mode.
  • the processed image frame can be displayed on the display unit 106.
  • the image frame processed by the graphics processor 1041 can be stored in the memory 109 (or other storage medium) or sent via the radio frequency unit 101 or the WiFi module 102.
  • the microphone 1042 can receive sound (audio data) via the microphone 1042 in a telephone call mode, a recording mode, a voice recognition mode, and other operating modes, and can process such sound into audio data.
  • the processed audio (voice) data can be converted into a format output that can be sent to a mobile communication base station via the radio frequency unit 101 in the case of a telephone call mode.
  • the microphone 1042 can implement various types of noise elimination (or suppression) algorithms to eliminate (or suppress) noise or interference generated in the process of receiving and sending audio signals.
  • the mobile terminal 100 also includes at least one sensor 105, such as a light sensor, a motion sensor, and other sensors.
  • the light sensor includes an ambient light sensor and a proximity sensor.
  • the ambient light sensor can adjust the brightness of the display panel 1061 according to the brightness of the ambient light
  • the proximity sensor can turn off the display panel 1061 and/or the backlight when the mobile terminal 100 is moved to the ear.
  • the accelerometer sensor can detect the magnitude of acceleration in all directions (generally three axes), and can detect the magnitude and direction of gravity when stationary.
  • sensors such as fingerprint sensors, pressure sensors, iris sensors, molecular sensors, gyroscopes, barometers, hygrometers, thermometers, infrared sensors, etc.
  • the display unit 106 is used to display information input by the user or information provided to the user.
  • the display unit 106 may include a display panel 1061, which may be configured in the form of a liquid crystal display (LCD), an organic light-emitting diode (OLED), or the like.
  • LCD liquid crystal display
  • OLED organic light-emitting diode
  • the user input unit 107 may be used to receive input digital or character information and generate key signal input related to user settings and function control of the mobile terminal.
  • the user input unit 107 may include a touch panel 1071 and other input devices 1072.
  • the touch panel 1071 also known as a touch screen, may collect user touch operations on or near it (for example, the user uses a finger, a stylus, or any other suitable object or accessory to touch the touch panel 1071 or on the touch surface).
  • the touch panel 1071 can detect the touch position of the user, detect the signal brought by the touch operation, and transmit the signal to the touch controller; the touch controller receives the touch information from the touch detection device, converts it into the touch point coordinates, and sends it to the processor 110, and can receive and execute the command sent by the processor 110. And/or, the touch panel 1071 can be implemented by various types such as resistive, capacitive, infrared and surface acoustic wave.
  • the user input unit 107 can also include other input devices 1072.
  • other input devices 1072 can include but are not limited to one or more of a physical keyboard, function keys (such as volume control keys, switch keys, etc.), a trackball, a mouse, a joystick, etc., which are not specifically limited here.
  • the touch panel 1071 may cover the display panel 1061.
  • the touch panel 1071 detects a touch operation on or near it, it is transmitted to the processor 110 to determine the type of the touch event, and then the processor 110 provides a corresponding visual output on the display panel 1061 according to the type of the touch event.
  • the touch panel 1071 and the display panel 1061 are used as two independent components to implement the input and output functions of the mobile terminal, in some embodiments, the touch panel 1071 and the display panel 1061 can be integrated to implement the input and output functions of the mobile terminal, which is not limited to the specifics herein.
  • the interface unit 108 serves as an interface through which at least one external device can be connected to the mobile terminal 100.
  • the external device may include a wired or wireless headset port, an external power supply (or battery charger) port, a wired or wireless data port, a memory card port, a port for connecting a device with an identification module, an audio input/output (I/O) port, a video I/O port, a headphone port, etc.
  • the interface unit 108 may be used to receive input (e.g., data information, power, etc.) from an external device and transmit the received input to one or more elements within the mobile terminal 100 or may be used to transmit data between the mobile terminal 100 and an external device.
  • the memory 109 can be used to store software programs and various data.
  • the memory 109 can mainly include a program storage area and a data storage area.
  • the program storage area can store an operating system, an application required for at least one function (such as a sound playback function, an image playback function, etc.), etc.
  • the data storage area can store data created according to the use of the mobile phone (such as audio data, a phone book, etc.), etc.
  • the memory 109 can include a high-speed random access memory, and can also include a non-volatile memory, such as at least one disk storage device, a flash memory device, or other volatile solid-state storage devices.
  • the processor 110 is the control center of the mobile terminal. It uses various interfaces and lines to connect various parts of the entire mobile terminal. It executes various functions of the mobile terminal and processes data by running or executing software programs and/or modules stored in the memory 109, and calling data stored in the memory 109, so as to monitor the mobile terminal as a whole.
  • the processor 110 may include one or more processing units; preferably, the processor 110 may integrate an application processor and a modem processor.
  • the application processor mainly processes the operating system, user interface, and application programs
  • the modem processor mainly processes wireless communications. It is understandable that the above-mentioned modem processor may not be integrated into the processor 110.
  • the mobile terminal 100 may also include a power supply 111 (such as a battery) for supplying power to various components.
  • a power supply 111 (such as a battery) for supplying power to various components.
  • the power supply 111 may be logically connected to the processor 110 via a power management system, thereby implementing functions such as charging, discharging, and power consumption management through the power management system.
  • the mobile terminal 100 may further include a Bluetooth module, etc., which will not be described in detail herein.
  • the communication network system is a NR (New Radio) system of universal mobile communication technology.
  • the NR system includes UE (User Equipment) 201, E-UTRAN (Evolved UMTS Terrestrial Radio Access Network) 202, EPC (Evolved Packet Core) 203 and the operator's IP service 204, which are connected in sequence.
  • UE User Equipment
  • E-UTRAN Evolved UMTS Terrestrial Radio Access Network
  • EPC Evolved Packet Core
  • UE201 may be the above-mentioned terminal device 100, which will not be described in detail here.
  • E-UTRAN 202 includes eNodeB 2021 and other eNodeBs 2022 , etc.
  • eNodeB 2021 may be connected to other eNodeBs 2022 via a backhaul (eg, an X2 interface), and eNodeB 2021 is connected to EPC 203 , and eNodeB 2021 may provide UE 201 with access to EPC 203 .
  • a backhaul eg, an X2 interface
  • EPC203 may include MME (Mobility Management Entity) 2031, HSS (Home Subscriber Server) 2032, other MMEs 2033, SGW (Serving Gate Way) 2034, PGW (PDN Gate Way) 2035 and PCRF (Policy and Charging Rules Function) 2036, etc.
  • MME 2031 is a control node that processes signaling between UE 201 and EPC 203, and provides bearer and connection management.
  • HSS 2032 is used to provide some registers to manage functions such as the home location register (not shown in the figure), and stores some user-specific information such as service features and data rates.
  • All user data can be sent through SGW 2034, PGW 2035 can provide IP address allocation and other functions for UE 201, and PCRF 2036 is a policy maker for service data flows and IP bearer resources.
  • the policy and charging control policy decision point selects and provides available policy and charging control decisions to the policy and charging execution functional unit (not shown in the figure).
  • IP service 204 may include the Internet, intranet, IMS (IP Multimedia Subsystem) or other IP services.
  • IMS IP Multimedia Subsystem
  • Fig. 3 is a schematic diagram of the hardware structure of a controller 140 provided in the present application.
  • the controller 140 includes: a memory 1401 and a processor 1402, the memory 1401 is used to store program instructions, and the processor 1402 is used to call the program instructions in the memory 1401 to execute the steps performed by the controller in the first embodiment of the above method, and its implementation principle and beneficial effects are similar, which will not be repeated here.
  • the controller further includes a communication interface 1403, which can be connected to the processor 1402 via a bus 1404.
  • the processor 1402 can control the communication interface 1403 to implement the receiving and sending functions of the controller 140.
  • Fig. 4 is a schematic diagram of the hardware structure of a network node 150 provided by the present application.
  • the network node 150 includes: a memory 1501 and a processor 1502, the memory 1501 is used to store program instructions, and the processor 1502 is used to call the program instructions in the memory 1501 to execute the steps performed by the first node in the first embodiment of the above method, and its implementation principle and beneficial effects are similar, which will not be repeated here.
  • the controller further includes a communication interface 1503, which can be connected to the processor 1502 via a bus 1504.
  • the processor 1502 can control the communication interface 1503 to implement the receiving and sending functions of the network node 150.
  • the above-mentioned integrated module implemented in the form of a software function module can be stored in a computer-readable storage medium.
  • the above-mentioned software function module is stored in a storage medium, including a number of instructions for enabling a computer device (which can be a personal computer, a server, or a network device, etc.) or a processor (English: processor) to perform some steps of the methods of various embodiments of the present application.
  • the computer program product includes one or more computer instructions.
  • the computer can be a general-purpose computer, a special-purpose computer, a computer network, or other programmable device.
  • the computer instructions can be stored in a storage medium, or transmitted from one storage medium to another storage medium.
  • the computer instructions can be transmitted from one website site, computer, server or data center to another website site, computer, server or data center by wired (e.g., coaxial cable, optical fiber, digital subscriber line (DSL)) or wireless (e.g., infrared, wireless, microwave, etc.).
  • the storage medium can be any available medium that can be accessed by the computer or a data storage device such as a server or data center that includes one or more available media integrated.
  • the available medium can be a magnetic medium (e.g., a floppy disk, a hard disk, a tape), an optical medium (e.g., a DVD), or a semiconductor medium (e.g., a solid state drive solid state disk, SSD), etc.
  • FIG. 5 is a schematic diagram of a flow chart of a switching method according to a first embodiment.
  • the switching method of the embodiment of the present application can be applied to a terminal device (such as a mobile phone), and includes the following steps:
  • the terminal device determines a cell configuration and performs LTM switching according to the cell configuration.
  • the cell configuration includes a central unit identifier and/or a candidate cell configuration.
  • the cell configuration is configured by the first master node.
  • the first master node (MN, Master Node) is the base station to which the terminal device initially connects.
  • the LTM switching includes switching between different central units and/or switching between the same central unit.
  • the cell configuration is used to perform handover to a candidate cell in at least one master node.
  • the at least one master node includes a second master node and/or a third master node.
  • At least one master node can be a base station of the same central unit (Intra-CU, Intra-Central Unit) or a base station of a different central unit (Inter-CU, Inter-Central Unit), such as a gNB.
  • Intra-CU Intra-Central Unit
  • Inter-CU Inter-Central Unit
  • gNB gNode B
  • the central unit identifier includes a serving cell central unit identifier and/or a candidate cell central unit identifier.
  • the central unit identifier is used for LTM switching to identify different central units and/or master nodes.
  • the central unit identifier may also be used to index different central unit cell configurations.
  • the terminal device determines whether to perform a different central unit switch or a same central unit switch by comparing whether the central unit identifier of the serving cell is the same as the central unit identifier of the candidate cell.
  • the terminal device determines to execute LTM switching cell and/or cell configuration by indexing different central unit LTM switching configurations and/or the same central unit LTM switching configuration through identification information.
  • the serving cell central unit identifier is different from the candidate cell central unit identifier, it is regarded as a handover of different central units.
  • the serving cell central unit identifier is the same as the candidate cell central unit identifier, it is regarded as the same central unit switching.
  • the cell radio network temporary identifier (C-RNTI, Cell Radio Network Temporary Identifier) will not be released, the access layer (AS, Access Stratum) master key will not be released, the PDCP (Packet Data Convergence Protocol) configuration will be retained, the SDAP (Service Data Adaptation Protocol) configuration will be retained, and whether to perform RLC (Radio Link Control) reconstruction will be determined based on not resetting the identifier.
  • C-RNTI Cell Radio Network Temporary Identifier
  • AS Access Stratum
  • RLC Radio Link Control
  • executing switching between different central units includes at least one of the following: releasing the cell wireless network temporary identifier; updating the master key; releasing the signaling bearer and/or data bearer configuration; executing packet data convergence protocol reconstruction; executing service data adaptation protocol reconfiguration; executing wireless link control reconstruction; executing media access control reset; updating the service cell central unit identifier; treating the reset identifier as different; updating the reset identifier; and executing full configuration.
  • the current LTM switching determines whether to perform RLC reconstruction through the serving cell non-reset flag (e.g., ltm-ServingCellNoResetID) and the candidate cell non-reset flag (e.g., ltm-NoResetID), for example: when the serving cell non-reset flag is not equal to the candidate cell non-reset flag, RLC reconstruction is performed after performing LTM switching; and/or, when the serving cell non-reset flag is equal to the candidate cell non-reset flag, RLC reconstruction is not performed.
  • the serving cell non-reset flag e.g., ltm-ServingCellNoResetID
  • the candidate cell non-reset flag e.g., ltm-NoResetID
  • the reset flags are considered to be different, indicating that RLC reconstruction needs to be performed after the LTM switching.
  • the logical channel that needs to perform RLC reconstruction after LTM switching is the logical channel currently configured by the terminal device, for example: confirmed according to the logical channel identifier (logicalChannelId and/or logicalChannelIdExt).
  • the switching method is applicable to non-dual link scenarios (DC, Dual Connectivity).
  • the LTM switching mechanism is improved, so that the LTM switching method not only supports continuous switching under the same central unit, but also supports switching between different central units, thereby improving the applicability of LTM switching.
  • FIG. 6 is a flow chart of a processing method according to a second embodiment. Based on the first embodiment of the present application, this embodiment further discloses step S2, which includes step S201 and/or step S202:
  • the first master node sends downlink control information (DCI, Downlink Conftol Information) to the terminal device.
  • DCI Downlink Control information
  • the terminal device confirms the candidate cell configuration based on the cell identification information carried in the downlink control information, and performs early uplink synchronization based on the candidate cell configuration, for example: sending a random access preamble.
  • the terminal device determines the cell that sends the random access preamble by indexing different central unit LTM switching configurations and/or the same central unit LTM switching configurations through cell identification information.
  • the terminal device also advances the uplink synchronization configuration through the cell identification information index, and sends a random access preamble according to the uplink synchronization configuration.
  • the network device sends downlink control information to trigger the terminal device to perform early uplink synchronization at any time before the terminal device reports the measurement result and/or at any time before sending the LTM switching command.
  • the first master node sends an LTM switching command to the terminal device.
  • the LTM switching command carries identification information, which is used to trigger the terminal device to perform LTM switching according to the identification information.
  • the LTM switching command triggers LTM switching between different central units.
  • the identification information carried by the LTM switching command is a cell identification and/or a candidate cell identification.
  • the content carried by the LTM switching command also includes: information parameters fed back by the second master node, including at least one of time advance, uplink scheduling and cell radio network temporary identifier.
  • the terminal device determines a candidate cell based on identification information carried in the LTM switching command and performs LTM switching to the candidate cell.
  • the terminal device determines to execute LTM switching cell and/or cell configuration by indexing different central unit LTM switching configurations and/or the same central unit LTM switching configuration through identification information.
  • the terminal device determines whether it is an LTM switch of different central units based on the central unit identifier of the LTM switching cell (also called the candidate cell central unit identifier) and the serving cell central unit identifier. For example: when the candidate cell central unit identifier is the same as the serving cell central unit identifier, it is regarded as a switch of the same central unit; and/or, when the candidate cell central unit identifier is different from the serving cell central unit identifier, it is regarded as a switch of different central units.
  • the terminal device sends a wireless resource control reconfiguration completion and/or the first uplink data to the second master node according to the uplink scheduling.
  • the terminal device performs random access-free switching in advance based on time.
  • the LTM switching process further includes applying at least one of an application cell radio network temporary identifier, an application cell reference configuration, and an application candidate cell configuration.
  • the cell radio network temporary identifier (C-RNTI) will not be released, the access layer (AS) master key will not be released, the PDCP configuration will be retained, the SDAP configuration will be retained, and whether to perform RLC reconstruction will be determined based on not resetting the identifier.
  • C-RNTI cell radio network temporary identifier
  • AS access layer
  • RLC reconstruction will be determined based on not resetting the identifier.
  • Update the serving cell central unit identifier for example, the candidate cell central unit identifier replaces the serving cell central unit identifier
  • the reset identifiers are considered unequal, for example, the serving cell reset identifier is different from the candidate cell reset identifier;
  • Update the reset identifier for example, the candidate cell reset identifier replaces the serving cell reset identifier
  • Execute full configuration (Full Config), please refer to protocol TS 38.331, 5.3.5.11 for details.
  • the terminal device receives the new schedule and regards the LTM switching as completed.
  • the LTM switching is LTM switching between different central units.
  • the scheduling includes uplink and/or downlink scheduling.
  • the candidate cell is regarded as the serving cell.
  • the terminal device when the terminal device receives a new schedule, it is deemed that the LTM switching of different central units is completed.
  • the LTM switching completion method in the R18 version protocol TS 38.321.
  • the second master node sends an updated cell radio network temporary identifier.
  • the terminal device sends and/or receives control information according to the updated cell radio network temporary identifier.
  • the technical solution of this embodiment specifically includes: if the service cell central unit identifier and the candidate cell central unit identifier are different, then executing a different central unit switch; and/or, if the service cell central unit identifier and the candidate cell central unit identifier are the same, then executing the same central unit switch, by judging the central unit identifier, clarifying the processing method of the corresponding switching process, and/or, reducing the signaling overhead of switching different central units, and/or, reducing the complexity of LTM switching processing.
  • this embodiment further discloses the switching method in the foregoing embodiments.
  • the first master node before executing the LTM switching, sends a switching request signaling (HANDOVER REQUEST) to at least one other master node, for example: the second master node and/or the third master node.
  • a switching request signaling HANDOVER REQUEST
  • the example of the first master node sending a switching request signaling to the second master node is used for explanation.
  • each master node is a base station of a different central unit (Inter-CU), for example: gNB.
  • Inter-CU central unit
  • At least one other master node responds to the switching request sent by the first master node and Feedback handover request confirmation (HANDOVER REQUEST ACKNOWLEDGE).
  • the fed-back handover request confirmation may carry the same central unit candidate cell configuration and/or different central unit handover configurations.
  • the same central unit candidate cell configuration is used for LTM handover within a corresponding master node, for example, a second master node or a third master node.
  • the configuration of candidate cells of the same central unit may refer to the R17 version protocol, for example: TS 38.331.
  • different central unit switching configurations may be used to execute different central unit LTM switching configurations, for example: radio resource control reconfiguration switching configuration of the second master node.
  • the different central unit configurations may also be any same central unit configuration in the corresponding master node, for example, the same central unit candidate cell configuration carried in the handover request confirmation in response to the first master node.
  • different central unit configurations may also be candidate cell configurations independent of the same central master node, for example: different central unit candidate cell configurations and the same central unit candidate cell configuration are carried in a response to the handover request confirmation of the first master node.
  • the first master node sends different central unit LTM switching configurations and/or the same central unit LTM switching configurations through radio resource control reconfiguration (RRCReconfiguration) signaling.
  • RRCReconfiguration radio resource control reconfiguration
  • the LTM switching configuration of the same central unit can be LTM-Config, mainly including at least one of the following: candidate cell identifier (LTM-CandidateId), reference configuration (ltm-ReferenceConfiguration), candidate cell configuration (LTM-Candidate), early uplink synchronization configuration (EarlyUL-syncConfig), configured scheduling configuration (CG, Configured Grant Config), serving cell non-reset identifier (ltm-ServingCellNoResetID), no reset identifier (ltm-NoResetID), for specific details, please refer to protocol TS 38.331.
  • the same central unit LTM switching configuration also includes a candidate cell central unit identifier and/or a serving cell central unit identifier, for example: ltm-CU-Id, ltm-ServingCellCU-Id.
  • the LTM switching configurations of different central units include: a central unit identifier and/or an LTM configuration (LTM-Config).
  • the LTM configuration content may refer to the LTM switching configuration of the same central unit.
  • the central unit identification may also be configured in the LTM configuration.
  • the central unit identifier is used for LTM switching to identify different central units and/or master nodes.
  • the central unit identifier may also be used to index different central unit cell configurations.
  • the LTM switching configurations of different central units are carried through a newly introduced information field (IE, Information Element), for example: ltm-InterCU-config, which is used to distinguish the same central unit configuration, and this application does not make specific limitations on this.
  • IE Information Element
  • the radio resource control reconfiguration further includes layer 1 measurement configuration, for example, at least one of a layer 1 measurement event, a measurement resource, and a reporting resource.
  • the different central unit configurations are further enhanced and/or optimized based on the R18 LTM switching configuration (LTM-Config).
  • the terminal device responds to the RRCReconfiguration signaling sent by the master node and sends a radio resource control reconfiguration complete (RRCReconfigurationComplete) signaling.
  • RRCReconfigurationComplete radio resource control reconfiguration complete
  • the radio resource control reconfiguration complete signaling is used to confirm that the base station configuration is acceptable.
  • the technical solution of this embodiment specifically includes introducing a central unit identifier in the cell configuration through the first master node during the preparation stage of LTM switching, so that the terminal device can distinguish whether the LTM switching is a switching between different central units, determine whether to perform different processing during the switching process, and/or establish a quick judgment mechanism, and/or reduce the complexity of the terminal device and the base station in executing LTM switching.
  • this embodiment further discloses the switching method in the foregoing embodiments.
  • the terminal device performs measurement according to the layer one measurement configuration and reports the measurement result.
  • the terminal device may continue to report the measurement result according to the measurement resource, and/or the terminal device may also report the measurement result after the measurement result satisfies the measurement event.
  • the first master node sends downlink control information.
  • the downlink control information may carry a cell identifier for enabling the terminal device to determine a cell to send a random access preamble based on the cell identifier information.
  • the cell identifier is a candidate cell identifier.
  • the terminal device confirms the candidate cell configuration based on the cell identification information carried in the downlink control information, and performs early uplink synchronization based on the candidate cell configuration, for example: sending a random access preamble.
  • the terminal device determines the cell for sending the random access preamble, for example, the cell of the second master node, by indexing different central unit LTM switching configurations and/or the same central unit LTM switching configurations through the cell identification information.
  • the terminal device advances the uplink synchronization configuration through the cell identification information index and sends a random access preamble according to the uplink synchronization configuration.
  • the second master node responds to the random access preamble sent by the terminal device and sends feedback information to the first master node.
  • the feedback information carries the candidate cell timing advance (TA, Timing Advance).
  • the feedback information may be a handover success (HANDOVER SUCCESS) signaling or a newly introduced signaling, such as a handover notification (HANDOVER NOTIFICATION), a time advance information transmission (TA INFORMATION TRANSFER), or other interactive signaling between base stations, which is not specifically limited in this embodiment.
  • HANDOVER SUCCESS handover success
  • HANDOVER NOTIFICATION handover notification
  • TA INFORMATION TRANSFER time advance information transmission
  • the first master node forwards the time advance information to the current service cell through the central unit distributed unit time advance information sending (CU-DU TA INFORMATION TRANSFER) signaling, and/or, through the distributed unit central unit time advance information sending (DU-CU TA INFORMATION TRANSFER) signaling.
  • CU-DU TA INFORMATION TRANSFER central unit distributed unit time advance information sending
  • DU-CU TA INFORMATION TRANSFER distributed unit central unit time advance information sending
  • the feedback information also carries parameters: uplink scheduling (UL Grant) and/or cell radio network temporary identifier (C-RNTI).
  • UL Grant uplink scheduling
  • C-RNTI cell radio network temporary identifier
  • the first master node sends an LTM switching command.
  • the LTM switching command carries identification information, triggering the terminal device to perform LTM switching according to the identification information.
  • the LTM switching command triggers LTM switching between different central units (Inter-CU LTM).
  • the identification information is a cell identification and/or a candidate cell identification.
  • the LTM switching command also carries: information parameters fed back by the second master node, including at least one of time advance, uplink scheduling and cell radio network temporary identifier.
  • the terminal device determines a candidate cell based on the LTM switching command identification information, and performs LTM switching to the candidate cell.
  • the LTM switching includes at least one of the following:
  • Determining whether it is a different central unit LTM switching according to the central unit identifier of the LTM switching cell and the central unit identifier of the serving cell for example: when it is determined that the central unit identifier of the LTM switching cell is the same as the central unit identifier of the serving cell, it is regarded as the same central unit switching; and/or, when it is determined that the central unit identifier of the LTM switching cell is different from the central unit identifier of the serving cell, it is regarded as a different central unit switching;
  • the LTM when it switches to the same central unit switch, it includes at least one of the following: not releasing the cell radio network temporary identifier (C-RNTI), not releasing the access stratum (AS) master key, retaining the PDCP configuration, retaining the SDAP configuration, and determining whether to perform RLC reconstruction based on not resetting the identifier.
  • C-RNTI cell radio network temporary identifier
  • AS access stratum
  • retaining the PDCP configuration retaining the SDAP configuration
  • RLC reconstruction based on not resetting the identifier For details, please refer to R18 protocol TS 38.331.
  • Update the serving cell central unit identifier for example, the candidate cell central unit identifier replaces the serving cell central unit identifier
  • the reset identifiers are considered unequal, for example, the serving cell reset identifier is different from the candidate cell reset identifier;
  • Update the reset identifier for example, the candidate cell reset identifier replaces the serving cell reset identifier
  • Execute full configuration (Full Config), please refer to protocol TS 38.331, 5.3.5.11 for details.
  • the second master node responds to the LTM switching completion information sent by the terminal device, sends a new schedule and regards the LTM switching as completed.
  • the terminal device receives the new schedule and regards the LTM switching as completed.
  • the LTM switching is LTM switching between different central units.
  • the scheduling includes uplink and/or downlink scheduling.
  • the candidate cell is regarded as the serving cell.
  • the terminal device when the terminal device receives a new schedule, it is deemed that the LTM switching of different central units is completed.
  • the LTM switching completion method in the R18 version protocol TS 38.321.
  • the second master node sends an updated cell radio network temporary identifier; the terminal device sends and/or receives control information according to the updated cell radio network temporary identifier.
  • the technical solution of this embodiment specifically includes that in the initial execution stage of LTM switching, the terminal device determines the corresponding switching process processing method by judging the central unit identifier, and/or reduces the signaling overhead of switching and reconfiguring different central units, and/or reduces the complexity of LTM switching processing.
  • this embodiment further discloses the switching method in the foregoing embodiments.
  • the terminal device after executing LTM switching from the first master node to the second master node, performs measurement according to the layer one measurement configuration and reports the measurement result to the second master node.
  • the terminal device may continue to report the measurement result based on the measurement resource, and/or the terminal device may further report the measurement result after the measurement result satisfies the measurement event.
  • the second master node sends downlink control information.
  • the downlink control information includes a cell identifier, so that the terminal device determines the cell to send the random access preamble based on the cell identifier information.
  • the terminal device determines the cell that sends the random access preamble, for example, the third master node, by indexing different central unit LTM switching configurations and/or the same central unit LTM switching configurations through the cell identification information.
  • the third master node may be the first master node, or may be another master node different from the first master node, which is not specifically limited in this embodiment.
  • the terminal device advances the uplink synchronization configuration through the cell identification information index, and sends a random access preamble to the third master node according to the uplink synchronization configuration.
  • the third master node responds to the random access preamble sent by the terminal device and sends feedback information to the second master node.
  • the feedback information carries the candidate cell time advance.
  • the feedback information may be carried in a handover success signaling or other inter-base station interaction signaling, which is not specifically limited in this embodiment.
  • the feedback information further carries parameters: uplink scheduling and/or cell radio network temporary identifier.
  • the second master node sends an LTM switching command.
  • the LTM switching command carries identification information, triggering the terminal device to perform LTM switching according to the identification information.
  • the LTM switching command triggers LTM switching between different central units.
  • the identification information is a cell identification and/or a candidate cell identification.
  • the LTM switching command also carries: information parameters fed back by the third master node, including at least one of time advance, uplink scheduling and cell radio network temporary identifier.
  • the terminal device determines a candidate cell based on the LTM switching command identification information, and performs LTM switching to the candidate cell.
  • the LTM switching includes at least one of the following:
  • Determining whether it is a different central unit LTM switching according to the central unit identifier of the LTM switching cell and the central unit identifier of the serving cell for example: when it is determined that the central unit identifier of the LTM switching cell is the same as the central unit identifier of the serving cell, it is regarded as the same central unit switching; and/or, when it is determined that the central unit identifier of the LTM switching cell is different from the central unit identifier of the serving cell, it is regarded as a different central unit switching;
  • the LTM when it switches to the same central unit switch, it includes at least one of the following: not releasing the cell wireless network temporary identifier, not releasing the access layer master key, retaining the PDCP configuration, retaining the SDAP configuration, and determining whether to perform RLC reconstruction based on not resetting the identifier.
  • the LTM when the LTM switches to a different central unit, at least one of the following is executed: releasing the cell wireless network temporary identifier; updating the master key; releasing the signaling bearer and/or data bearer configuration; executing packet data convergence protocol reconstruction; executing packet data convergence protocol data recovery; executing service data adaptation protocol reconfiguration; executing radio link control reconstruction; executing MAC reset; updating the service cell central unit identifier, for example, the candidate cell central unit identifier replaces the service cell central unit identifier; treating the reset identifier as unequal, for example, the service cell reset identifier is different from the candidate cell reset identifier; updating the reset identifier, for example, the candidate cell reset identifier replaces the service cell reset identifier; executing full configuration (Full Config).
  • the third master node responds to the LTM switching completion information sent by the terminal device, sends a new schedule and regards the LTM switching as completed.
  • the terminal device receives the new schedule and regards the LTM switching as completed.
  • the LTM switching is LTM switching between different central units.
  • the scheduling includes uplink and/or downlink scheduling.
  • the candidate cell is regarded as the serving cell.
  • the terminal device when the terminal device receives a new schedule, it is deemed that the LTM switching of different central units is completed.
  • the LTM switching completion method in the R18 version protocol TS 38.321.
  • the third master node sends an updated cell radio network temporary identifier; the terminal device sends and/or receives control information according to the updated cell radio network temporary identifier.
  • the terminal device can execute LTM switching from the first main node to the second main node, and then continuously execute LTM switching to the third main node, and realize continuous switching between different central units through the central unit identification, thereby reducing the signaling overhead of switching and reconfiguring different central units, and/or reducing the complexity of LTM switching processing, and/or improving the applicability of LTM switching.
  • FIG. 7 is a schematic flow chart of a switching method according to a sixth embodiment.
  • the method of this embodiment can be applied to a master node (such as a base station), and includes the following steps:
  • S1 Send the cell configuration so that the terminal device can perform LTM switching based on the cell configuration.
  • the master node in this embodiment includes at least one of a first master node, a second master node, and a third master node.
  • the first master node is a base station to which the terminal device is initially connected.
  • the first master node sends a switching request signaling to at least one other master node, for example, a second master node and/or a third master node.
  • a switching request signaling to the second master node is used for explanation.
  • each master node is a base station of a different central unit, for example: gNB.
  • At least one other master node responds to the switching request sent by the first master node and feeds back a switching request confirmation.
  • the fed-back handover request confirmation may carry the same central unit candidate cell configuration and/or different central unit handover configurations.
  • the first master node sends downlink control information to the terminal device.
  • the downlink control information includes cell identification information
  • the terminal device can determine the cell to send the random access preamble based on the cell identification information.
  • the terminal device confirms the candidate cell configuration based on the cell identification information carried in the downlink control information, and performs early uplink synchronization based on the candidate cell configuration, for example: sending a random access preamble.
  • the terminal device determines the cell that sends the random access preamble by indexing different central unit LTM switching configurations and/or the same central unit LTM switching configurations through cell identification information.
  • the terminal device also advances the uplink synchronization configuration through the cell identification information index, and sends a random access preamble according to the uplink synchronization configuration.
  • the LTM switching command carries identification information, which is used to trigger the terminal device to perform LTM switching according to the identification information.
  • the LTM switching command triggers LTM switching between different central units.
  • the identification information carried by the LTM switching command is a cell identification and/or a candidate cell identification.
  • the content carried by the LTM switching command also includes: information parameters fed back by the second master node, including at least one of time advance, uplink scheduling and cell radio network temporary identifier.
  • the terminal device determines a candidate cell based on identification information carried in the LTM switching command and performs LTM switching to the candidate cell.
  • the terminal device determines to execute LTM switching cell and/or cell configuration by indexing different central unit LTM switching configurations and/or the same central unit LTM switching configuration through identification information.
  • the terminal device determines whether it is an LTM switch of different central units based on the central unit identifier of the LTM switching cell (also called the candidate cell central unit identifier) and the serving cell central unit identifier. For example: when the candidate cell central unit identifier is the same as the serving cell central unit identifier, it is regarded as a switch of the same central unit; and/or, when the candidate cell central unit identifier is different from the serving cell central unit identifier, it is regarded as a switch of different central units.
  • the terminal device sends a wireless resource control reconfiguration completion and/or the first uplink data to the second master node according to the uplink scheduling.
  • the terminal device performs random access-free switching in advance based on time.
  • the LTM switching process further includes applying at least one of an application cell radio network temporary identifier, an application cell reference configuration, and an application candidate cell configuration.
  • the cell wireless network temporary identifier will not be released, the access layer master key will not be released, the PDCP configuration will be retained, the SDAP configuration will be retained, and whether to perform RLC reconstruction will be determined based on not resetting the identifier.
  • the LTM when the LTM is switched to a different central unit, at least one of the following is included:
  • the terminal device releases the temporary identification of the cell wireless network
  • the terminal device updates the master key
  • the terminal equipment releases the signaling bearer and/or data bearer configuration
  • the terminal device performs packet data convergence protocol reconstruction
  • the terminal device executes service data adaptation protocol reconfiguration
  • the terminal device performs radio link control reestablishment
  • the terminal device performs a media access control reset
  • the terminal device updates the service cell center unit identification
  • the terminal device considers the reset identifier as different
  • the terminal device updates and resets the identification
  • the terminal device performs a full configuration.
  • the second master node responds to the LTM switching completion information sent by the terminal device, sends a new schedule and regards the LTM switching as completed.
  • the terminal device receives the new schedule and regards the LTM switching as completed.
  • the LTM switching is LTM switching between different central units.
  • the scheduling includes uplink and/or downlink scheduling.
  • the candidate cell is regarded as the serving cell.
  • the LTM switching mechanism is improved, so that the LTM switching mode not only supports continuous switching under the same central unit, but also supports switching between different central units, thereby improving the applicability of LTM switching.
  • FIG. 8 is a schematic diagram of an interaction sequence according to a seventh embodiment.
  • the first master node sends the cell configuration to the terminal device (such as a mobile phone) so that the terminal device performs LTM switching to the second master node based on the cell configuration, and further performs LTM switching from the second master node to the third master node.
  • the terminal device such as a mobile phone
  • the first master node is a base station to which the terminal device is initially connected.
  • the first master node sends a switching request signaling to the second master node and/or the third master node.
  • each master node is a base station of a different central unit, for example: gNB.
  • the second master node and/or the third master node responds to the switching request sent by the first master node and feeds back a switching request confirmation.
  • the fed-back handover request confirmation may carry the same central unit candidate cell configuration and/or different central unit handover configuration.
  • the same central unit candidate cell configuration and/or different central unit candidate cell configuration include a central unit identifier.
  • the central unit identifier may also be configured through the first master node.
  • the first master node sends different central unit LTM switching configurations and/or the same central unit LTM switching configurations through radio resource control reconfiguration (RRCReconfiguration) signaling.
  • RRCReconfiguration radio resource control reconfiguration
  • the LTM switching configuration of the same central unit can be LTM-Config, which mainly includes at least one of the following: candidate cell identification, reference configuration, candidate cell configuration (LTM-Candidate), early uplink synchronization configuration, configuration scheduling configuration, service cell non-reset identification, and non-reset identification.
  • LTM-Config which mainly includes at least one of the following: candidate cell identification, reference configuration, candidate cell configuration (LTM-Candidate), early uplink synchronization configuration, configuration scheduling configuration, service cell non-reset identification, and non-reset identification.
  • the same central unit LTM switching configuration also includes a candidate cell central unit identifier and/or a serving cell central unit identifier, for example: ltm-CU-Id and/or ltm-ServingCellCU-Id.
  • the LTM switching configurations of different central units include: a central unit identifier and/or an LTM configuration (LTM-Config).
  • the LTM configuration content may refer to the LTM switching configuration of the same central unit.
  • the central unit identification may also be configured in the LTM configuration.
  • the central unit identifier is used for LTM switching to identify different central units and/or master nodes.
  • the central unit identifier may also be used to index different central unit cell configurations.
  • the LTM switching configurations of different central units are carried through a newly introduced information field (IE, Information Element), for example: ltm-InterCU-config, which is used to distinguish the same central unit configuration, and this is not specifically limited in this embodiment.
  • IE Information Element
  • the radio resource control reconfiguration further includes layer 1 measurement configuration, for example, at least one of a layer 1 measurement event, a measurement resource, and a reporting resource.
  • the terminal device performs measurement according to the layer one measurement configuration and reports the measurement result.
  • the terminal device may continue to report the measurement result based on the measurement resource, and/or the terminal device may further report the measurement result after the measurement result satisfies the measurement event.
  • the first master node sends downlink control information to the terminal device.
  • the downlink control information includes cell identification information
  • the terminal device can determine the cell to send the random access preamble based on the cell identification information.
  • the terminal device confirms the candidate cell configuration based on the cell identification information carried in the downlink control information, and performs early uplink synchronization based on the candidate cell configuration, for example: sending a random access preamble.
  • the terminal device determines the cell that sends the random access preamble by indexing different central unit LTM switching configurations and/or the same central unit LTM switching configurations through cell identification information.
  • the terminal device also advances uplink synchronization configuration through the cell identification information index, and sends a random access preamble according to the uplink synchronization configuration.
  • the network device sends downlink control information to trigger the terminal device to perform early uplink synchronization, which can be any time before the terminal device reports the measurement result and/or any time before sending the LTM switching command.
  • the second master node responds to the random access preamble sent by the terminal device and sends feedback information to the first master node.
  • the feedback information carries the candidate cell time advance.
  • the feedback information may be carried in a handover success signaling or other inter-base station interaction signaling, which is not specifically limited in this embodiment.
  • the first master node after receiving the feedback information from the second master node, the first master node sends signaling via the central unit dispersed unit time advance information, and/or sends signaling via the dispersed unit central unit time advance information to forward the time advance information to the current serving cell.
  • the first master node sends an LTM switching command to the terminal device.
  • the LTM switching command carries identification information, which is used to trigger the terminal device to execute the LTM switching according to the identification information. Change.
  • the LTM switching command triggers LTM switching between different central units.
  • the identification information carried by the LTM switching command is a cell identification and/or a candidate cell identification.
  • the content carried by the LTM switching command also includes: information parameters fed back by the second master node, including at least one of time advance, uplink scheduling and cell radio network temporary identifier.
  • the terminal device determines a candidate cell based on identification information carried in the LTM switching command and performs LTM switching to the candidate cell.
  • the terminal device determines to execute LTM switching cell and/or cell configuration by indexing different central unit LTM switching configurations and/or the same central unit LTM switching configuration through identification information.
  • the terminal device determines whether it is an LTM switch of different central units based on the central unit identifier of the LTM switching cell (also called the candidate cell central unit identifier) and the serving cell central unit identifier. For example: when the candidate cell central unit identifier is the same as the serving cell central unit identifier, it is regarded as a switch of the same central unit; and/or, when the candidate cell central unit identifier is different from the serving cell central unit identifier, it is regarded as a switch of different central units.
  • the terminal device sends a wireless resource control reconfiguration completion and/or the first uplink data to the second master node according to the uplink scheduling.
  • the terminal device performs random access-free switching in advance based on time.
  • the LTM switching process further includes applying at least one of an application cell radio network temporary identifier, an application cell reference configuration, and an application candidate cell configuration.
  • the cell wireless network temporary identifier will not be released, the access layer master key will not be released, the PDCP configuration will be retained, the SDAP configuration will be retained, and whether to perform RLC reconstruction will be determined based on not resetting the identifier.
  • the LTM when the LTM switches to a different central unit, at least one of the following is executed: releasing the cell wireless network temporary identifier; updating the master key; releasing the signaling bearer and/or data bearer configuration; executing packet data convergence protocol reconstruction; executing packet data convergence protocol data recovery; executing service data adaptation protocol reconfiguration; executing radio link control reconstruction; executing MAC reset; updating the service cell central unit identifier, for example: the candidate cell central unit identifier replaces the service cell central unit identifier; treating the reset identifier as unequal, for example: the service cell reset identifier is different from the candidate cell reset identifier; updating the reset identifier, for example: the candidate cell reset identifier replaces the service cell reset identifier; executing full configuration.
  • the second master node responds to the LTM switching completion information sent by the terminal device, sends a new schedule and regards the LTM switching as completed.
  • the terminal device receives the new schedule and regards the LTM switching as completed.
  • the LTM switching is LTM switching between different central units.
  • the scheduling includes uplink and/or downlink scheduling.
  • the candidate cell is regarded as the serving cell.
  • the terminal device when the terminal device receives a new schedule, it is deemed that the LTM switching of different central units is completed.
  • the LTM switching completion method in the R18 version protocol TS 38.321.
  • the second master node sends an updated cell radio network temporary identifier; the terminal device sends and/or receives control information according to the updated cell radio network temporary identifier.
  • the terminal device after executing LTM switching from the first master node to the second master node, performs measurement according to the layer one measurement configuration and reports the measurement result to the second master node.
  • the terminal device may continue to report the measurement result based on the measurement resource, and/or the terminal device may further report the measurement result after the measurement result satisfies the measurement event.
  • the second master node sends downlink control information.
  • the downlink control information includes a cell identifier, so that the terminal device determines a cell to send a random access preamble based on the cell identifier information.
  • the terminal device determines the cell that sends the random access preamble, for example, the third master node, by indexing different central unit LTM switching configurations and/or the same central unit LTM switching configurations through the cell identification information.
  • the third master node may be the first master node, or may be another master node different from the first master node, which is not specifically limited in this embodiment.
  • the terminal device advances the uplink synchronization configuration through the cell identification information index, and sends a random access preamble to the third master node according to the uplink synchronization configuration.
  • the third master node sends feedback information to the second master node in response to the random access preamble sent by the terminal device.
  • the feedback information carries the candidate cell time advance.
  • the feedback information may be carried in a handover success signaling or other inter-base station interaction signaling, which is not specifically limited in this embodiment.
  • the feedback information further carries parameters: uplink scheduling and/or cell radio network temporary identifier.
  • the second master node sends an LTM switching command.
  • the LTM switching command carries identification information, triggering the terminal device to perform LTM switching according to the identification information.
  • the LTM switching command triggers LTM switching between different central units.
  • the identification information is a cell identification and/or a candidate cell identification.
  • the LTM switching command also carries: information parameters fed back by the third master node, including at least one of time advance, uplink scheduling and cell radio network temporary identifier.
  • the terminal device determines a candidate cell based on the LTM switching command identification information, and performs LTM switching to the candidate cell.
  • the LTM when it switches to the same central unit switch, it includes at least one of the following: not releasing the cell wireless network temporary identifier, not releasing the access layer master key, retaining the PDCP configuration, retaining the SDAP configuration, and determining whether to perform RLC reconstruction based on not resetting the identifier.
  • the LTM when the LTM switches to a different central unit, at least one of the following is executed: releasing the cell wireless network temporary identifier; updating the master key; releasing the signaling bearer and/or data bearer configuration; executing packet data convergence protocol reconstruction; executing packet data convergence protocol data recovery; executing service data adaptation protocol reconfiguration; executing radio link control reconstruction; executing MAC reset; updating the service cell central unit identifier, for example, the candidate cell central unit identifier replaces the service cell central unit identifier; treating the reset identifier as unequal, for example, the service cell reset identifier is different from the candidate cell reset identifier; updating the reset identifier, for example, the candidate cell reset identifier replaces the service cell reset identifier; executing full configuration, for details, please refer to protocol TS 38.331, 5.3.5.11.
  • the third master node responds to the LTM switching completion information sent by the terminal device, sends a new schedule and regards the LTM switching as completed.
  • the terminal device receives the new schedule and regards the LTM switching as completed.
  • the LTM switching is LTM switching between different central units.
  • the scheduling includes uplink and/or downlink scheduling.
  • the candidate cell is regarded as the serving cell.
  • the terminal device when the terminal device receives a new schedule, it is deemed that the LTM switching of different central units is completed.
  • the LTM switching completion method in the R18 version protocol TS 38.321.
  • the third master node sends an updated cell radio network temporary identifier; the terminal device sends and/or receives control information according to the updated cell radio network temporary identifier.
  • the technical solution of this embodiment specifically includes sending the cell configuration to the terminal device so that the terminal device executes LTM switching to the second main node based on the cell configuration, and further continuously executes LTM switching from the second main node to the third main node.
  • the processing method of the corresponding switching process is clarified, and/or the signaling overhead of switching and reconfiguration of different central units is reduced, and/or the complexity of LTM switching processing is reduced, and/or the applicability of LTM switching is improved.
  • FIG. 9 is a schematic diagram of the structure of a switching device provided in an embodiment of the present application.
  • the device can be mounted on or is the terminal device in the above method embodiment.
  • the switching device shown in FIG. 9 can be used to perform some or all of the functions in the method embodiment described in the above embodiment.
  • the switching device 1100 includes:
  • the switching module 1101 is used to perform LTM switching based on cell configuration.
  • the device further comprises at least one of the following:
  • the cell configuration includes a central unit identifier and/or a candidate cell configuration
  • the cell configuration is configured by the first master node
  • the cell configuration is used to perform a handover to a candidate cell in at least one master node
  • LTM switching includes switching between different central units and/or switching between the same central unit.
  • the device further comprises at least one of the following:
  • the central unit identifier includes a serving cell central unit identifier and/or a candidate cell central unit identifier
  • the at least one master node includes a second master node and/or a third master node.
  • performing LTM switching based on cell configuration includes at least one of the following:
  • serving cell central unit identifier and the candidate cell central unit identifier are different, performing a different central unit switching
  • the serving cell central unit identifier and the candidate cell central unit identifier are the same, the same central unit switching is performed.
  • the performing of switching between different central units includes at least one of the following:
  • the device further comprises at least one of the following:
  • Control information is sent and/or received according to the updated cell radio network temporary identifier.
  • the switching device provided in the embodiment of the present application can execute the technical solution shown in the above method embodiment, and its implementation principle and beneficial effects are similar, which will not be repeated here.
  • Figure 10 is a second structural schematic diagram of a switching device provided in an embodiment of the present application.
  • the device can be mounted on or is the network device in the above method embodiment.
  • the switching device shown in Figure 10 can be used to perform some or all of the functions in the method embodiment described in the above embodiment.
  • the switching device 1200 includes:
  • the sending module 1201 is used to send the cell configuration so that the terminal device can perform LTM switching based on the cell configuration.
  • the device further comprises at least one of the following:
  • the cell configuration is sent to the terminal device via radio resource control reconfiguration signaling.
  • the device further comprises at least one of the following:
  • the cell configuration is carried in the handover request feedback and/or the handover request confirmation;
  • the cell configuration includes a central unit identifier and/or a candidate cell configuration
  • the cell configuration is used to perform a handover to a candidate cell in at least one master node
  • LTM switching includes switching between different central units and/or switching between the same central unit.
  • the central unit identifier includes a serving cell central unit identifier and/or a candidate cell central unit identifier.
  • the device further comprises at least one of the following:
  • the terminal device performs a switch between different central units
  • the terminal device performs the same central unit switching.
  • the terminal device performs switching between different central units, including at least one of the following:
  • the terminal device releases the temporary identification of the cell wireless network
  • the terminal device updates the master key
  • the terminal equipment releases the signaling bearer and/or data bearer configuration
  • the terminal device performs packet data convergence protocol reconstruction
  • the terminal device executes service data adaptation protocol reconfiguration
  • the terminal device performs radio link control reestablishment
  • the terminal device performs a media access control reset
  • the terminal device updates the service cell center unit identification
  • the terminal device considers the reset identifier as different
  • the terminal device updates and resets the identification
  • the terminal device performs a full configuration.
  • the switching device provided in the embodiment of the present application can execute the technical solution shown in the above method embodiment, and its implementation principle and beneficial effects are similar, which will not be repeated here.
  • the communication device 160 described in this embodiment can be a terminal device (or a component that can be used for a terminal device) or a network device (or a component that can be used for a network device) mentioned in the aforementioned method embodiment.
  • the communication device 160 can be used to implement the method corresponding to the terminal device or the network device described in the aforementioned method embodiment, and specifically refer to the description in the aforementioned method embodiment.
  • the communication device 160 may include one or more processors 161, which may also be referred to as a processing unit. Certain control or processing functions can be realized.
  • the processor 161 can be a general-purpose processor or a dedicated processor, etc. For example, it can be a baseband processor or a central processing unit.
  • the baseband processor can be used to process the communication protocol and communication data
  • the central processing unit can be used to control the communication device, execute the software program, and process the data of the software program.
  • the processor 161 may also store instructions 163 or data (eg, intermediate data).
  • the instructions 163 may be executed by the processor 161, so that the communication device 160 executes the method corresponding to the terminal device or network device described in the above method embodiment.
  • the communication device 160 may include a circuit, which can implement the functions of sending or receiving or communicating in the aforementioned method embodiments.
  • the communication device 160 may include one or more memories 162, on which instructions 164 may be stored. The instructions may be executed on the processor 161, so that the communication device 160 executes the method described in the above method embodiment.
  • data may also be stored in the memory 162.
  • the processor 161 and the memory 162 may be provided separately or integrated together.
  • the communication device 160 may further include a transceiver 165 and/or an antenna 166.
  • the processor 161 may be referred to as a processing unit, and controls the communication device 160 (terminal device or core network device or wireless access network device).
  • the transceiver 165 may be referred to as a transceiver unit, a transceiver, a transceiver circuit, or a transceiver, etc., and is used to implement the transceiver function of the communication device 160.
  • the transceiver 165 can receive the cell configuration; and the processor 161 can perform LTM switching based on the cell configuration.
  • the specific implementation process of the processor 161 and the transceiver 165 can refer to the relevant description of the above embodiments, which will not be repeated here.
  • the transceiver 165 can send the cell configuration so that the terminal device can perform LTM switching based on the cell configuration.
  • the specific implementation process of the processor 161 and the transceiver 165 can refer to the relevant description of the above embodiments, which will not be repeated here.
  • the processor 161 and the transceiver 165 described in the present application can be implemented in an IC (Integrated Circuit), an analog integrated circuit, an RFIC (Radio Frequency Integrated Circuit), a mixed signal integrated circuit, an ASIC (Application Specific Integrated Circuit), a PCB (Printed Circuit Board), an electronic device, etc.
  • IC Integrated Circuit
  • RFIC Radio Frequency Integrated Circuit
  • ASIC Application Specific Integrated Circuit
  • PCB Print Circuit Board
  • the processor 161 and the transceiver 165 can also be manufactured using various integrated circuit process technologies, such as CMOS (Complementary Metal Oxide Semiconductor), NMOS (N Metal-Oxide-Semiconductor), PMOS (Positive channel Metal Oxide Semiconductor), BJT (Bipolar Junction Transistor), bipolar CMOS (BiCMOS), silicon germanium (SiGe), gallium arsenide (GaAs), etc.
  • CMOS Complementary Metal Oxide Semiconductor
  • NMOS N Metal-Oxide-Semiconductor
  • PMOS Positive channel Metal Oxide Semiconductor
  • BJT Bipolar Junction Transistor
  • BiCMOS bipolar CMOS
  • SiGe silicon germanium
  • GaAs gallium arsenide
  • the communication device may be a terminal device (such as a mobile phone) or a network device (such as a base station), which needs to be determined according to the context.
  • the terminal device may be implemented in various forms.
  • the terminal device described in this application may include mobile terminals such as mobile phones, tablet computers, laptop computers, PDAs, portable media players (PMPs), navigation devices, wearable devices, smart bracelets, pedometers, etc., as well as fixed terminal devices such as digital TVs and desktop computers.
  • the communication device is described by taking a terminal device or a network device as an example, the scope of the communication device described in the present application is not limited to the above terminal device or network device, and the structure of the communication device may not be limited by Figure 11.
  • the communication device may be an independent device or may be part of a larger device.
  • An embodiment of the present application also provides a communication system, including: a terminal device as in any of the above embodiments; and a network device as in any of the above embodiments.
  • An embodiment of the present application also provides a communication device, including a memory and a processor, wherein a switching program is stored in the memory, and when the switching program is executed by the processor, the steps of the switching method in any of the above embodiments are implemented.
  • the communication device in this application can be a terminal device (such as a mobile phone) or a network device (such as a base station).
  • a terminal device such as a mobile phone
  • a network device such as a base station
  • An embodiment of the present application further provides a storage medium, on which a switching program is stored.
  • the switching program is executed by a processor, the steps of the switching method in any of the above embodiments are implemented.
  • the embodiment of the present application further provides a computer program product, which includes a computer program code.
  • a computer program product which includes a computer program code.
  • the computer program code runs on a computer, the computer executes the methods in the above various possible implementation modes.
  • An embodiment of the present application also provides a chip, including a memory and a processor, the memory is used to store a computer program, and the processor is used to call and run the computer program from the memory, so that a device equipped with the chip executes the methods in various possible implementation modes as described above.
  • the units in the device of the embodiment of the present application can be merged, divided and deleted according to actual needs.
  • a computer program product includes one or more computer instructions.
  • the computer can be a general-purpose computer, a special-purpose computer, a computer network, or other programmable device.
  • Computer instructions can be stored in a storage medium or transmitted from one storage medium to another storage medium.
  • computer instructions can be transmitted from one website, computer, server or data center to another website, computer, server or data center by wired (e.g., coaxial cable, optical fiber, digital subscriber line) or wireless (e.g., infrared, wireless, microwave, etc.) means.
  • the storage medium can be any available medium that a computer can access or a data storage device such as a server or data center that includes one or more available media integrated. Available media can be magnetic media (e.g., floppy disk, storage disk, tape), optical media (e.g., DVD), or semiconductor media (e.g., solid-state storage disk Solid State Disk (SSD)), etc.

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Abstract

本申请技术方案通过基于小区配置执行LTM切换，完善了LTM切换的机制，使LTM切换方式不仅支持相同中心单元下的连续切换，还支持不同中心单元间的切换，提高了LTM切换的适用性。

Description

切换方法、通信设备及存储介质 技术领域
本申请涉及通信技术领域，尤其涉及一种切换方法、通信设备及存储介质。
背景技术
现有协议中，LTM(L1/L2 Triggered Mobility，层一层二触发移动性)切换方式包括：通过终端设备上报测量报告，网络设备(如基站)确定执行切换后，通过媒体接入控制信令下发切换命令，终端设备执行LTM切换。
在构思及实现本申请过程中，发明人发现至少存在如下问题：现有的LTM切换方式仅支持相同中心单元(Intra-CU，Intra-Central Unit)下连续切换，并不支持不同中心单元(Inter-CU，Inter-Central Unit)间的切换，即LTM切换机制不完善。
前面的叙述在于提供一般的背景信息，并不一定构成现有技术。
技术解决方案
本申请的主要目的在于提供一种切换方法、通信设备及存储介质，旨在完善LTM切换的机制，以提高LTM切换的适用性。
本申请提供的一种切换方法，可应用于终端设备(如手机)，包括步骤：
S2：基于小区配置执行LTM切换。
可选地，所述方法还包括以下至少一项：
小区配置包括中心单元标识和/或候选小区配置；
小区配置由第一主节点配置；
小区配置用于向至少一主节点中的候选小区执行切换；
LTM切换包括不同中心单元切换和/或相同中心单元切换。
可选地，所述方法还包括以下至少一项：
中心单元标识包括服务小区中心单元标识和/或候选小区中心单元标识；
至少一主节点包括第二主节点和/或第三主节点。
可选地，步骤S2，包括以下至少一项：
若服务小区中心单元标识和候选小区中心单元标识不相同，则执行不同中心单元切换；
若服务小区中心单元标识和候选小区中心单元标识相同，则执行相同中心单元切换。
可选地，所述执行不同中心单元切换，包括以下至少一项：
释放小区无线网络临时标识；
更新主密钥；
释放信令承载和/或数据承载配置；
执行分组数据汇聚协议重建；
执行服务数据适配协议重配；
执行无线链路控制重建；
执行媒体接入控制重置；
更新服务小区中心单元标识；
将重置标识视为不相同；
更新重置标识；
执行全配置。
可选地，所述方法还包括以下至少一项：
基于切换命令确定至少一主节点中的候选小区；
基于无线资源控制信令确定小区配置；
接收第二主节点发送的更新的小区无线网络临时标识；
根据更新的小区无线网络临时标识发送和/或接收控制信息。
本申请还提供一种切换方法，可应用于网络设备(如基站)，包括步骤：
S1：发送小区配置，以供终端设备基于小区配置执行LTM切换。
可选地，所述方法还包括以下至少一项：
发送切换请求信令给至少一主节点；
接收至少一主节点发送的切换请求反馈和/或切换请求确认；
通过无线资源控制重配信令发送小区配置至终端设备。
可选地，所述方法还包括以下至少一项：
小区配置携带于切换请求反馈和/或切换请求确认；
小区配置包括中心单元标识和/或候选小区配置；
小区配置用于向至少一主节点中的候选小区执行切换；
LTM切换包括不同中心单元切换和/或相同中心单元切换。
可选地，所述中心单元标识包括服务小区中心单元标识和/或候选小区中心单元标识。
可选地，所述方法还包括以下至少一项：
若服务小区中心单元标识和候选小区中心单元标识不相同，则终端设备执行不同中心单元切换；
若服务小区中心单元标识和候选小区中心单元标识相同，则终端设备执行相同中心单元切换。
可选地，所述终端设备执行不同中心单元切换，包括以下至少一项：
终端设备释放小区无线网络临时标识；
终端设备更新主密钥；
终端设备释放信令承载和/或数据承载配置；
终端设备执行分组数据汇聚协议重建；
终端设备执行服务数据适配协议重配；
终端设备执行无线链路控制重建；
终端设备执行媒体接入控制重置；
终端设备更新服务小区中心单元标识；
终端设备将重置标识视为不相同；
终端设备更新重置标识；
终端设备执行全配置。
本申请还提供一种通信设备，包括：存储器、处理器及存储在所述存储器上并可在所述处理器上运行的切换程序，所述切换程序被所述处理器执行时实现如上任一所述的切换方法的步骤。
本申请中的通信设备，可以是终端设备(如手机)，也可以是网络设备(如基站)，具体所指，需要根据上下文加以明确。
本申请还提供一种存储介质，所述存储介质上存储有计算机程序，所述计算机程序被处理器执行时实现如上任一所述的切换方法的步骤。
本申请技术方案通过基于小区配置执行LTM切换，完善了LTM切换的机制，使LTM切换方式不仅支持相同中心单元下的连续切换，还支持不同中心单元间的切换，提高了LTM切换的适用性。
附图说明
此处的附图被并入说明书中并构成本说明书的一部分，示出了符合本申请的实施例，并与说明书一起用于解释本申请的原理。为了更清楚地说明本申请实施例的技术方案，下面将对实施例描述中所需要使用的附图作简单地介绍，显而易见地，对于本领域普通技术人员而言，在不付出创造性劳动性的前提下，还可以根据这些附图获得其他的附图。
图1为实现本申请各个实施例的一种移动终端的硬件结构示意图；
图2为本申请实施例提供的一种通信网络系统架构图；
图3为本申请提供的一种控制器140的硬件结构示意图；
图4为本申请提供的一种网络节点150的硬件结构示意图；
图5为根据第一实施例示出的切换方法的流程示意图；
图6为根据第二实施例示出的处理方法的流程示意图；
图7为根据第六实施例示出的切换方法的流程示意图；
图8为根据第七实施例示出的交互时序示意图；
图9为本申请实施例提供的切换装置的结构示意图一；
图10为本申请实施例提供的切换装置的结构示意图二；
图11为本申请实施例提供的通信设备的结构示意图。
本申请目的的实现、功能特点及优点将结合实施例，参照附图做进一步说明。通过上述附图，已示出本申请明确的实施例，后文中将有更详细的描述。这些附图和文字描述并不是为了通过任何方式限制本申请构思的范围，而是通过参考特定实施例为本领域技术人员说明本申请的概念。
本申请的实施方式
这里将详细地对示例性实施例进行说明，其示例表示在附图中。下面的描述涉及附图时，除非另有表示，不同附图中的相同数字表示相同或相似的要素。以下示例性实施例中所描述的实施方式并不代表与本申请相一致的所有实施方式。相反，它们仅是与如所附权利要求书中所详述的、本申请的一些方面相一致的装置和方法的例子。
需要说明的是，在本文中，术语“包括”、“包含”或者其任何其他变体意在涵盖非排他性的包含，从而使得包括一系列要素的过程、方法、物品或者装置不仅包括那些要素，而且还包括没有明确列出的其他要素，或者是还包括为这种过程、方法、物品或者装置所固有的要素。在没有更多限制的情况下，由语句“包括一个……”限定的要素，并不排除在包括该要素的过程、方法、物品或者装置中还存在另外的相同要素，和/或，本申请不同实施例中具有同样命名的部件、特征、要素可能具有相同含义，也可能具有不同含义，其具体含义需以其在该具体实施例中的解释或者进一步结合该具体实施例中上下文进行确定。
应当理解，尽管在本文可能采用术语第一、第二、第三等来描述各种信息，但这些信息不应限于这些术语。这些术语仅用来将同一类型的信息彼此区分开。例如，在不脱离本文范围的情况下，第一信息也可以被称为第二信息，类似地，第二信息也可以被称为第一信息。取决于语境，如在此所使用的词语"如果"可以被解释成为"在……时"或"当……时"或"响应于确定"。再者，如同在本文中所使用的，单数形式“一”、“一个”和“该”旨在也包括复数形式，除非上下文中有相反的指示。应当进一步理解，术语“包含”、“包括”表明存在所述的特征、步骤、操作、元件、组件、项目、种类、和/或组，但不排除一个或多个其他特征、步骤、操作、元件、组件、项目、种类、和/或组的存在、出现或添加。本申请使用的术语“或”、“和/或”、“包括以下至少一个”等可被解释为包括性的，或意味着任一个或任何组合。例如，“包括以下至少一个：A、B、C”意味着“以下任一个：A；B；C；A和B；A和C；B和C；A和B和C”，再如，“A、B或C”或者“A、B和/或C”意味着“以下任一个：A；B；C；A和B；A和C；B和C；A和B和C”。仅当元件、功能、步骤或操作的组合在某些方式下内在地互相排斥时，才会出现该定义的例外。
应该理解的是，虽然本申请实施例中的流程图中的各个步骤按照箭头的指示依次显示，但是这些步骤并不是必然按照箭头指示的顺序依次执行。除非本文中有明确的说明，这些步骤的执行并没有严格的顺序限制，其可以以其他的顺序执行。而且，图中的至少一部分步骤可以包括多个子步骤或者多个阶段，这些子步骤或者阶段并不必然是在同一时刻执行完成，而是可以在不同的时刻执行，其执行顺序也不必然是依次进行，而是可以与其他步骤或者其他步骤的子步骤或者阶段的至少一部分轮流或者交替地执行。
取决于语境，如在此所使用的词语“如果”、“若”可以被解释成为“在……时”或“当……时”或“响应于确定”或“响应于检测”。类似地，取决于语境，短语“如果确定”或“如果检测(陈述的条件或事件)”可以被解释成为“当确定时”或“响应于确定”或“当检测(陈述的条件或事件)时”或“响应于检测(陈述的条件或事件)”。
需要说明的是，在本文中，采用了诸如S1、S2等步骤代号，其目的是为了更清楚简要地表述相应内容，不构成顺序上的实质性限制，本领域技术人员在具体实施时，可能会先执行S2后执行S1等，但这些均应在本申请的保护范围之内。
应当理解，此处所描述的具体实施例仅仅用以解释本申请，并不用于限定本申请。
在后续的描述中，使用用于表示元件的诸如“模块”、“部件”或者“单元”的后缀仅为了有利于本申请的说明，其本身没有特定的意义。因此，“模块”、“部件”或者“单元”可以混合地使用。
本申请中的通信设备，可以是终端设备(如手机)，也可以是网络设备(如基站)，具体所指，需要根据上下文加以明确。
终端设备可以以各种形式来实施。例如，本申请中描述的终端设备可以包括诸如手机、平板电脑、笔记本电脑、掌上电脑、个人数字助理(Personal Digital Assistant，PDA)、便捷式媒体播放器(Portable Media Player，PMP)、导航装置、可穿戴设备、智能手环、计 步器等智能终端设备，以及诸如数字TV、台式计算机等固定终端设备。
后续描述中将以移动终端为例进行说明，本领域技术人员将理解的是，除了特别用于移动目的的元件之外，根据本申请的实施方式的构造也能够应用于固定类型的终端设备。
请参阅图1，其为实现本申请各个实施例的一种移动终端的硬件结构示意图，该移动终端100可以包括：RF(Radio Frequency，射频)单元101、WiFi模块102、音频输出单元103、A/V(音频/视频)输入单元104、传感器105、显示单元106、用户输入单元107、接口单元108、存储器109、处理器110、以及电源111等部件。本领域技术人员可以理解，图1中示出的移动终端结构并不构成对移动终端的限定，移动终端可以包括比图示更多或更少的部件，或者组合某些部件，或者不同的部件布置。
下面结合图1对移动终端的各个部件进行具体的介绍：
射频单元101可用于收发信息或通话过程中，信号的接收和发送，具体的，将基站的下行信息接收后，给处理器110处理；另外，将上行的数据发送给基站。通常，射频单元101包括但不限于天线、至少一个放大器、收发信机、耦合器、低噪声放大器、双工器等。和/或，射频单元101还可以通过无线通信与网络和其他设备通信。上述无线通信可以使用任一通信标准或协议，包括但不限于GSM(Global System of Mobile communication，全球移动通讯系统)、GPRS(General Packet Radio Service，通用分组无线服务)、CDMA2000(Code Division Multiple Access 2000，码分多址2000)、WCDMA(Wideband Code Division Multiple Access,宽带码分多址)、TD-SCDMA(Time Division-Synchronous Code Division Multiple Access，时分同步码分多址)、FDD-LTE(Frequency Division Duplexing-Long Term Evolution，频分双工长期演进)、TDD-LTE(Time Division Duplexing-Long Term Evolution，分时双工长期演进)、5G NR(New Radio)和6G等。
WiFi属于短距离无线传输技术，移动终端通过WiFi模块102可以帮助用户收发电子邮件、浏览网页和访问流式媒体等，它为用户提供了无线的宽带互联网访问。虽然图1示出了WiFi模块102，但是可以理解的是，其并不属于移动终端的必须构成，完全可以根据需要在不改变发明的本质的范围内而省略。
音频输出单元103可以在移动终端100处于呼叫信号接收模式、通话模式、记录模式、语音识别模式、广播接收模式等等模式下时，将射频单元101或WiFi模块102接收的或者在存储器109中存储的音频数据转换成音频信号并且输出为声音。而且，音频输出单元103还可以提供与移动终端100执行的特定功能相关的音频输出(例如，呼叫信号接收声音、消息接收声音等等)。音频输出单元103可以包括扬声器、蜂鸣器等等。
A/V输入单元104用于接收音频或视频信号。A/V输入单元104可以包括图形处理器(Graphics Processing Unit，GPU)1041和麦克风1042，图形处理器1041对在视频捕获模式或图像捕获模式中由图像捕获装置(如摄像头)获得的静态图片或视频的图像数据进行处理。处理后的图像帧可以显示在显示单元106上。经图形处理器1041处理后的图像帧可以存储在存储器109(或其它存储介质)中或者经由射频单元101或WiFi模块102进行发送。麦克风1042可以在电话通话模式、记录模式、语音识别模式等等运行模式中经由麦克风1042接收声音(音频数据)，并且能够将这样的声音处理为音频数据。处理后的音频(语音)数据可以在电话通话模式的情况下转换为可经由射频单元101发送到移动通信基站的格式输出。麦克风1042可以实施各种类型的噪声消除(或抑制)算法以消除(或抑制)在接收和发送音频信号的过程中产生的噪声或者干扰。
移动终端100还包括至少一种传感器105，比如光传感器、运动传感器以及其他传感器。可选地，光传感器包括环境光传感器及接近传感器，可选地，环境光传感器可根据环境光线的明暗来调节显示面板1061的亮度，接近传感器可在移动终端100移动到耳边时，关闭显示面板1061和/或背光。作为运动传感器的一种，加速计传感器可检测各个方向上(一般为三轴)加速度的大小，静止时可检测出重力的大小及方向，可用于识别手机姿态的应用(比如横竖屏切换、相关游戏、磁力计姿态校准)、振动识别相关功能(比如计步器、敲击)等；至于手机还可配置的指纹传感器、压力传感器、虹膜传感器、分子传感器、陀螺仪、气压计、湿度计、温度计、红外线传感器等其他传感器，在此不再赘述。
显示单元106用于显示由用户输入的信息或提供给用户的信息。显示单元106可包括显示面板1061，可以采用液晶显示器(Liquid Crystal Display，LCD)、有机发光二极管(Organic Light-Emitting Diode,OLED)等形式来配置显示面板1061。
用户输入单元107可用于接收输入的数字或字符信息，以及产生与移动终端的用户设置以及功能控制有关的键信号输入。可选地，用户输入单元107可包括触控面板1071以及其他输入设备1072。触控面板1071，也称为触摸屏，可收集用户在其上或附近的触摸操作(比如用户使用手指、触笔等任何适合的物体或附件在触控面板1071上或在触控面 板1071附近的操作)，并根据预先设定的程式驱动相应的连接装置。触控面板1071可包括触摸检测装置和触摸控制器两个部分。可选地，触摸检测装置检测用户的触摸方位，并检测触摸操作带来的信号，将信号传送给触摸控制器；触摸控制器从触摸检测装置上接收触摸信息，并将它转换成触点坐标，再送给处理器110，并能接收处理器110发来的命令并加以执行。和/或，可以采用电阻式、电容式、红外线以及表面声波等多种类型实现触控面板1071。除了触控面板1071，用户输入单元107还可以包括其他输入设备1072。可选地，其他输入设备1072可以包括但不限于物理键盘、功能键(比如音量控制按键、开关按键等)、轨迹球、鼠标、操作杆等中的一种或多种，具体此处不做限定。
可选地，触控面板1071可覆盖显示面板1061，当触控面板1071检测到在其上或附近的触摸操作后，传送给处理器110以确定触摸事件的类型，随后处理器110根据触摸事件的类型在显示面板1061上提供相应的视觉输出。虽然在图1中，触控面板1071与显示面板1061是作为两个独立的部件来实现移动终端的输入和输出功能，但是在某些实施例中，可以将触控面板1071与显示面板1061集成而实现移动终端的输入和输出功能，具体此处不做限定。
接口单元108用作至少一个外部装置与移动终端100连接可以通过的接口。例如，外部装置可以包括有线或无线头戴式耳机端口、外部电源(或电池充电器)端口、有线或无线数据端口、存储卡端口、用于连接具有识别模块的装置的端口、音频输入/输出(I/O)端口、视频I/O端口、耳机端口等等。接口单元108可以用于接收来自外部装置的输入(例如，数据信息、电力等等)并且将接收到的输入传输到移动终端100内的一个或多个元件或者可以用于在移动终端100和外部装置之间传输数据。
存储器109可用于存储软件程序以及各种数据。存储器109可主要包括存储程序区和存储数据区，可选地，存储程序区可存储操作系统、至少一个功能所需的应用程序(比如声音播放功能、图像播放功能等)等；存储数据区可存储根据手机的使用所创建的数据(比如音频数据、电话本等)等。和/或，存储器109可以包括高速随机存取存储器，还可以包括非易失性存储器，例如至少一个磁盘存储器件、闪存器件、或其他易失性固态存储器件。
处理器110是移动终端的控制中心，利用各种接口和线路连接整个移动终端的各个部分，通过运行或执行存储在存储器109内的软件程序和/或模块，以及调用存储在存储器109内的数据，执行移动终端的各种功能和处理数据，从而对移动终端进行整体监控。处理器110可包括一个或多个处理单元；优选的，处理器110可集成应用处理器和调制解调处理器，可选地，应用处理器主要处理操作系统、用户界面和应用程序等，调制解调处理器主要处理无线通信。可以理解的是，上述调制解调处理器也可以不集成到处理器110中。
移动终端100还可以包括给各个部件供电的电源111(比如电池)，优选的，电源111可以通过电源管理系统与处理器110逻辑相连，从而通过电源管理系统实现管理充电、放电、以及功耗管理等功能。
尽管图1未示出，移动终端100还可以包括蓝牙模块等，在此不再赘述。
为了便于理解本申请实施例，下面对本申请的移动终端所基于的通信网络系统进行描述。
请参阅图2，图2为本申请实施例提供的一种通信网络系统架构图，该通信网络系统为通用移动通信技术的NR(New Radio,新空口)系统，该NR系统包括依次通讯连接的UE(User Equipment，用户设备)201，E-UTRAN(Evolved UMTS Terrestrial Radio Access Network，演进式UMTS陆地无线接入网)202，EPC(Evolved Packet Core，演进式分组核心网)203和运营商的IP业务204。
可选地，UE201可以是上述终端设备100，此处不再赘述。
E-UTRAN202包括eNodeB2021和其它eNodeB2022等。可选地，eNodeB2021可以通过回程(backhaul)(例如X2接口)与其它eNodeB2022连接，eNodeB2021连接到EPC203，eNodeB2021可以提供UE201到EPC203的接入。
EPC203可以包括MME(Mobility Management Entity，移动性管理实体)2031，HSS(Home Subscriber Server，归属用户服务器)2032，其它MME2033，SGW(Serving Gate Way，服务网关)2034，PGW(PDN Gate Way，分组数据网络网关)2035和PCRF(Policy and Charging Rules Function，政策和资费功能实体)2036等。可选地，MME2031是处理UE201和EPC203之间信令的控制节点，提供承载和连接管理。HSS2032用于提供一些寄存器来管理诸如归属位置寄存器(图中未示)之类的功能，并且保存有一些有关服务特征、数据速率等用户专用的信息。所有用户数据都可以通过SGW2034进行发送，PGW2035可以提供UE 201的IP地址分配以及其它功能，PCRF2036是业务数据流和IP承载资源的策 略与计费控制策略决策点，它为策略与计费执行功能单元(图中未示)选择及提供可用的策略和计费控制决策。
IP业务204可以包括因特网、内联网、IMS(IP Multimedia Subsystem，IP多媒体子系统)或其它IP业务等。
虽然上述以LTE系统为例进行了介绍，但本领域技术人员应当知晓，本申请不仅仅适用于LTE系统，也可以适用于其他无线通信系统，例如GSM、CDMA2000、WCDMA、TD-SCDMA、5G以及未来新的网络系统(如6G)等，此处不做限定。
图3为本申请提供的一种控制器140的硬件结构示意图。该控制器140包括：存储器1401和处理器1402，存储器1401用于存储程序指令，处理器1402用于调用存储器1401中的程序指令执行上述方法实施例一中控制器所执行的步骤，其实现原理以及有益效果类似，此处不再进行赘述。
可选地，上述控制器还包括通信接口1403，该通信接口1403可以通过总线1404与处理器1402连接。处理器1402可以控制通信接口1403来实现控制器140的接收和发送的功能。
图4为本申请提供的一种网络节点150的硬件结构示意图。该网络节点150包括：存储器1501和处理器1502，存储器1501用于存储程序指令，处理器1502用于调用存储器1501中的程序指令执行上述方法实施例一中首节点所执行的步骤，其实现原理以及有益效果类似，此处不再进行赘述。
可选地，上述控制器还包括通信接口1503，该通信接口1503可以通过总线1504与处理器1502连接。处理器1502可以控制通信接口1503来实现网络节点150的接收和发送的功能。
上述以软件功能模块的形式实现的集成的模块，可以存储在一个计算机可读取存储介质中。上述软件功能模块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)或处理器(英文：processor)执行本申请各个实施例方法的部分步骤。
在上述实施例中，可以全部或部分地通过软件、硬件、固件或者其任意组合来实现。当使用软件实现时，可以全部或部分地以计算机程序产品的形式实现。计算机程序产品包括一个或多个计算机指令。在计算机上加载和执行计算机程序指令时，全部或部分地产生按照本申请实施例的流程或功能。计算机可以是通用计算机、专用计算机、计算机网络、或者其他可编程装置。计算机指令可以存储在存储介质中，或者从一个存储介质向另一个存储介质传输，例如，计算机指令可以从一个网站站点、计算机、服务器或数据中心通过有线(例如同轴电缆、光纤、数字用户线(DSL))或无线(例如红外、无线、微波等)方式向另一个网站站点、计算机、服务器或数据中心进行传输。存储介质可以是计算机能够存取的任何可用介质或者是包含一个或多个可用介质集成的服务器、数据中心等数据存储设备。可用介质可以是磁性介质，(例如，软盘、硬盘、磁带)、光介质(例如，DVD)、或者半导体介质(例如固态硬盘solid state disk，SSD)等。
基于上述移动终端硬件结构以及通信网络系统，提出本申请各个实施例。
第一实施例
参照图5，图5为根据第一实施例示出的切换方法的流程示意图，本申请实施例的切换方法可应用于终端设备(如手机)，包括步骤：
S2：基于小区配置执行LTM切换。
可选地，终端设备响应于接收到切换命令，确定小区配置，依据小区配置执行LTM切换。
可选地，小区配置包括中心单元标识和/或候选小区配置。
可选地，小区配置由第一主节点配置。
可选地，第一主节点(MN，Master Node)为终端设备初始连接的基站。
可选地，LTM切换包括不同中心单元切换和/或相同中心单元切换。
可选地，小区配置用于向至少一主节点中的候选小区执行切换。
可选地，至少一主节点包括第二主节点和/或第三主节点。
可选地，至少一主节点可以为相同中心单元(Intra-CU，Intra-Central Unit)的基站，也可以为不同中心单元(Inter-CU，Inter-Central Unit)的基站，例如gNB。
可选地，中心单元标识包括服务小区中心单元标识和/或候选小区中心单元标识。
可选地，中心单元标识用于LTM切换识别不同中心单元和/或主节点。
可选地，中心单元标识还可用于索引不同中心单元小区配置。
可选地，终端设备通过比较服务小区中心单元标识与候选小区中心单元标识是否相同，确认执行不同中心单元切换或相同中心单元切换。
可选地，终端设备通过标识信息索引不同中心单元LTM切换配置和/或相同中心单元LTM切换配置，确定执行LTM切换小区和/或小区配置
可选地，当服务小区中心单元标识与候选小区中心单元标识不同，则视为不同中心单元切换。
可选地，当服务小区中心单元标识与候选小区中心单元标识相同，则视为相同中心单元切换。
可选地，当LTM切换为相同中心单元切换，则不释放小区无线网络临时标识(C-RNTI，Cell Radio Network Temporary Identifier)、不释放接入层(AS，Access Stratum)主密钥、保留PDCP(Packet Data Convergence Protocol，分组数据汇聚层协议)配置、保留SDAP(Service Data Adaptation Protocol，服务数据适配协议)配置、依据不重置标识判断是否执行RLC(Radio Link Control，无线链路控制)重建。
可选地，执行不同中心单元切换，包括以下至少一项：释放小区无线网络临时标识；更新主密钥；释放信令承载和/或数据承载配置；执行分组数据汇聚协议重建；执行服务数据适配协议重配；执行无线链路控制重建；执行媒体接入控制重置；更新服务小区中心单元标识；将重置标识视为不相同；更新重置标识；执行全配置。
可选地，当前LTM切换通过服务小区不重置标识(例如：ltm-ServingCellNoResetID)和候选小区不重置标识(例如：ltm-NoResetID)判断是否执行RLC重建，例如：当服务小区不重置标识与候选小区不重置标识不相等，在执行LTM切换后执行RLC重建；和/或，当服务小区不重置标识与候选小区不重置标识相等，不执行RLC重建。
可选地，当执行不同中心单元LTM切换，将重置标识视为不相同，表示在LTM切换后需要执行RLC重建。
可选地，LTM切换后需要执行RLC重建的逻辑信道为终端设备当前配置的逻辑信道，例如：依据逻辑信道标识确认(logicalChannelId和/或logicalChannelIdExt)。
可选地，所述切换方法适用于非双链接场景(DC，Dual Connectivity)。
通过本实施例技术方案，具体通过基于小区配置执行LTM切换，完善了LTM切换的机制，使LTM切换方式不仅支持相同中心单元下的连续切换，还支持不同中心单元间的切换，提高了LTM切换的适用性。
第二实施例
参照图6，图6为根据第二实施例示出的处理方法的流程示意图，在本申请第一实施例的基础上，本实施例进一步公开了步骤S2，步骤S2包括步骤S201和/或步骤S202：
S201：若服务小区中心单元标识和候选小区中心单元标识不相同，则执行不同中心单元切换；
S202：若服务小区中心单元标识和候选小区中心单元标识相同，则执行相同中心单元切换。
可选地，第一主节点下发下行控制信息(DCI，Downlink Conftol Information)至终端设备。
可选地，下行控制信息包括小区标识信息，终端设备可以基于小区标识信息确定发送随机接入前导的小区。
可选地，终端设备依据下行控制信息携带的小区标识信息确认候选小区配置，依据候选小区配置执行提前上行同步，例如：发送随机接入前导。
可选地，终端设备通过小区标识信息索引不同中心单元LTM切换配置和/或相同中心单元LTM切换配置，确定发送随机接入前导的小区。
可选地，终端设备还通过小区标识信息索引提前上行同步配置，依据上行同步配置发送随机接入前导。
可选地，网络设备下发下行控制信息触发终端设备执行提前上行同步可以是在终端设备上报测量结果之前的任意时刻，和/或，也可以是在下发LTM切换命令之前的任意时刻。
可选地，第一主节点下发LTM切换命令至终端设备。
可选地，LTM切换命令携带标识信息，用于触发终端设备依据标识信息执行LTM切换。
可选地，LTM切换命令触发不同中心单元间的LTM切换。
可选地，LTM切换命令携带的标识信息为小区标识和/或候选小区标识。
可选地，LTM切换命令携带的内容还包括：第二主节点反馈的信息参数，包括时间提前、上行调度以及小区无线网络临时标识中的至少一项。
可选地，终端设备依据LTM切换命令中携带的标识信息确定候选小区并执行LTM切换至候选小区。
可选地，终端设备通过标识信息索引不同中心单元LTM切换配置和/或相同中心单元LTM切换配置，确定执行LTM切换小区和/或小区配置。
可选地，终端设备依据确定LTM切换小区的中心单元标识(又称为候选小区中心单元标识)以及服务小区中心单元标识，判断是否为不同中心单元LTM切换，例如：当候选小区中心单元标识与服务小区中心单元标识相同，则视为相同中心单元切换；和/或，当候选小区中心单元标识与服务小区中心单元标识不同，则视为不同中心单元切换。
可选地，终端设备依据上行调度发送无线资源控制重配完成和/或首个上行数据至第二主节点。
可选地，终端设备依据时间提前执行免随机接入切换。
可选地，在LTM切换过程中，还包括应用小区无线网络临时标识、应用小区参考配置以及应用候选小区配置中的至少一项。
可选地，当LTM切换为相同中心单元切换，则不释放小区无线网络临时标识(C-RNTI)、不释放接入层(AS，Access Stratum)主密钥、保留PDCP配置、保留SDAP配置、依据不重置标识判断是否执行RLC重建等，具体可参考R18协议TS 38.331。
可选地，当LTM切换为不同中心单元切换，则执行以下至少一项：
释放小区无线网络临时标识；
更新主密钥(Master Key)；
释放信令承载和/或数据承载配置；
执行分组数据汇聚协议重建(Re-establishment)；
执行分组数据汇聚协议数据恢复(PDCP Data Recovery)；
执行服务数据适配协议重配；
执行无线链路控制重建；
执行MAC重置(Reset)；
更新服务小区中心单元标识，例如：候选小区中心单元标识取代服务小区中心单元标识；
将重置标识视为不相等，例如：服务小区重置标识与候选小区重置标识不同；
更新重置标识，例如：候选小区重置标识取代服务小区重置标识；
执行全配置(Full Config)，具体可参考协议TS 38.331，5.3.5.11。
可选地，第二主节点响应终端设备发送的LTM切换完成信息，发送新的调度并视为LTM切换完成。
可选地，终端设备接收新的调度并视为LTM切换完成。
可选地，所述LTM切换为不同中心单元间LTM切换。
可选地，所述调度包括上行和/或下行调度。
可选地，当不同中心单元LTM切换完成则将候选小区视为是服务小区(Serving cell)。
可选地，终端设备接收新的调度则视为不同中心单元LTM切换完成，具体可参考R18版本协议TS 38.321中LTM切换完成方式的确定。
可选地，在LTM切换完成后，第二主节点发送更新的小区无线网络临时标识。
可选地，终端设备依据更新的小区无线网络临时标识发送和/或接收控制信息。
通过本实施例技术方案，具体包括若服务小区中心单元标识和候选小区中心单元标识不相同，则执行不同中心单元切换；和/或，若服务小区中心单元标识和候选小区中心单元标识相同，则执行相同中心单元切换，通过判断中心单元标识，明确相应切换流程的处理方式，和/或，减少不同中心单元切换重配信令开销，和/或，减少LTM切换处理复杂度。
第三实施例
在本申请前述任一实施例的基础上，本实施例进一步公开了前述实施例中的切换方法。
可选地，在执行LTM切换之前，第一主节点发送切换请求信令(HANDOVER REQUEST)给至少一个其他主节点，例如：第二主节点和/或第三主节点，本实施例中以第一主节点发送切换请求信令至第二主节点为例进行说明。
可选地，各主节点为不同中心单元(Inter-CU)的基站，例如：gNB。
可选地，至少一个其他主节点(如第二主节点)响应第一主节点发送的切换请求，反 馈切换请求确认(HANDOVER REQUEST ACKNOWLEDGE)。
可选地，反馈的切换请求确认中可以携带包括相同中心单元候选小区配置和/或不同中心单元切换配置。
可选地，相同中心单元候选小区配置用于相应主节点内LTM切换，例如：第二主节点或第三主节点。
可选地，相同中心单元候选小区配置具体可参考R17版本协议，例如：TS 38.331。
可选地，不同中心单元切换配置可以用于执行不同中心单元LTM切换的配置，例如：第二主节点的无线资源控制重配切换配置。
可选地，不同中心单元配置还可以是相应主节点中任一相同中心单元配置，例如：在响应第一主节点的切换请求确认中携带的相同中心单元候选小区配置。
可选地，不同中心单元配置还可以是独立于相同中心主节点的候选小区配置，例如：在响应第一主节点的切换请求确认中携带包括不同中心单元候选小区配置和相同中心单元候选小区配置。
可选地，第一主节点通过无线资源控制重配(RRCReconfiguration)信令发送不同中心单元LTM切换配置和/或相同中心单元LTM切换配置。
可选地，相同中心单元LTM切换配置可以是LTM-Config，主要包括以下至少一项：候选小区标识(LTM-CandidateId)、参考配置(ltm-ReferenceConfiguration)、候选小区配置(LTM-Candidate)、提前上行同步配置(EarlyUL-syncConfig)、配置调度配置(CG，Configured Grant Config)、服务小区不重置标识(ltm-ServingCellNoResetID)、不重置标识(ltm-NoResetID)，具体细节可以参考协议TS 38.331。
可选地，相同中心单元LTM切换配置还包括候选小区中心单元标识和/或服务小区中心单元标识，例如：ltm-CU-Id、ltm-ServingCellCU-Id。
可选地，不同中心单元LTM切换配置包括：中心单元标识和/或LTM配置(LTM-Config)，可选地，LTM配置内容可参考相同中心单元LTM切换配置。
可选地，中心单元标识还可以配置于LTM配置中。
可选地，中心单元标识用于LTM切换识别不同中心单元和/或主节点。
可选地，中心单元标识还可以用于索引不同中心单元小区配置。
可选地，不同中心单元LTM切换配置包括通过新引入的信息栏位(IE，Information Element)携带，例如：ltm-InterCU-config，用于区分相同中心单元配置，本申请对此不进行具体限定。
可选地，无线资源控制重配还包括层一测量配置，例如：层一测量事件(Event)、测量资源以及上报资源中的至少一项。
可选地，本实施例不同中心单元配置和/或中心单元标识配置示例如下：
可选地，所述不同中心单元配置是基于R18LTM切换配置(LTM-Config)进一步增强和/或优化。
可选地，终端设备响应主节点发送的RRCReconfiguration信令，发送无线资源控制重配完成(RRCReconfigurationComplete)信令，可选地，无线资源控制重配完成信令用于确认基站配置是可被接受的。
通过本实施例技术方案，具体包括在LTM切换的准备阶段，通过第一主节点在小区配置中引入中心单元标识，使终端设备可以区分LTM切换是否为不同中心单元间切换，判断是否在切换过程中执行不同的处理，和/或，建立快速判断机制，和/或，减少终端设备和基站执行LTM切换的复杂度。
第四实施例
在本申请前述任一实施例的基础上，本实施例进一步公开了前述实施例中的切换方法。
可选地，终端设备依据层一测量配置执行测量并上报测量结果，可选地，终端设备可以依据测量资源持续上报测量结果，和/或，终端设备还可以在测量结果满足测量事件后上报测量结果。
可选地，第一主节点下发下行控制信息，可选地，下行控制信息中可以携带小区标识，用于使终端设备基于小区标识信息确定发送随机接入前导的小区，可选地，小区标识为候选小区标识。
可选地，终端设备依据下行控制信息携带的小区标识信息确认候选小区配置，依据候选小区配置执行提前上行同步，例如：发送随机接入前导。
可选地，终端设备通过小区标识信息索引不同中心单元LTM切换配置和/或相同中心单元LTM切换配置，确定发送随机接入前导的小区，例如：第二主节点的小区。
可选地，终端设备通过小区标识信息索引提前上行同步配置，依据上行同步配置发送随机接入前导。
可选地，第二主节点响应终端设备发送的随机接入前导，发送反馈信息给第一主节点，可选地，反馈信息携带候选小区时间提前(TA，Timing Advance)。
可选地，所述反馈信息可以是切换成功(HANDOVER SUCCESS)信令或是新引入的信令，例如：切换通知(HANDOVER NOTIFICATION)、时间提前信息发送(TA INFORMATION TRANSFER)，或是其他基站间交互信令携带，本实施例中对此不进行具体限定。
可选地，第一主节点收到第二主节点反馈信息后，通过中心单元分散单元时间提前信息发送(CU-DU TA INFORMATION TRANSFER)信令，和/或，通过分散单元中心单元时间提前信息发送(DU-CU TA INFORMATION TRANSFER)信令，将时间提前信息转送给当前的服务小区。
可选地，所述反馈信息还携带参数：上行调度(UL Grant)和/或小区无线网络临时标识(C-RNTI)。
可选地，第一主节点下发LTM切换命令。
可选地，LTM切换命令携带标识信息，触发终端设备依据标识信息执行LTM切换。
可选地，所述LTM切换命令触发不同中心单元间的LTM切换(Inter-CU LTM)。
可选地，所述标识信息为小区标识和/或候选小区标识。
可选地，所述LTM切换命令携带内容还包括：第二主节点反馈的信息参数，包括时间提前、上行调度以及小区无线网络临时标识中的至少一项。
可选地，终端设备依据LTM切换命令标识信息确定候选小区，并执行LTM切换至候选小区。
可选地，LTM切换包括以下至少一项：
通过标识信息索引不同中心单元LTM切换配置和/或相同中心单元LTM切换配置，确定执行LTM切换小区和/或小区配置，例如：第二主节点；
依据确定LTM切换小区的中心单元标识以及服务小区中心单元标识判断是否为不同中心单元LTM切换，例如：当确定LTM切换小区的中心单元标识与服务小区中心单元标识相同，则视为相同中心单元切换；和/或，当确定LTM切换小区的中心单元标识与服务小区中心单元标识不同，则视为不同中心单元切换；
依据上行调度发送无线资源控制重配完成和/或首个上行数据；
依据时间提前执行免随机接入切换；
应用小区无线网络临时标识；
应用小区参考配置；
应用候选小区配置。
可选地，当LTM切换为相同中心单元切换，则包括以下至少一项：不释放小区无线网络临时标识(C-RNTI)、不释放接入层(AS，Access Stratum)主密钥、保留PDCP配置、保留SDAP配置，以及依据不重置标识判断是否执行RLC重建，具体可参考R18协议TS 38.331。
可选地，当LTM切换为不同中心单元切换，则执行以下至少一项：
释放小区无线网络临时标识；
更新主密钥(Master Key)；
释放信令承载和或数据承载配置；
执行分组数据汇聚协议重建；
执行分组数据汇聚协议数据恢复；
执行服务数据适配协议重配；
执行无线链路控制重建；
执行MAC重置；
更新服务小区中心单元标识，例如：候选小区中心单元标识取代服务小区中心单元标识；
将重置标识视为不相等，例如：服务小区重置标识与候选小区重置标识不同；
更新重置标识，例如：候选小区重置标识取代服务小区重置标识；
执行全配置(Full Config)，具体可参考协议TS 38.331，5.3.5.11。
可选地，第二主节点响应终端设备发送的LTM切换完成信息，发送新的调度并视为LTM切换完成。
可选地，终端设备接收新的调度并视为LTM切换完成。
可选地，所述LTM切换为不同中心单元间LTM切换。
可选地，所述调度包括上行和/或下行调度。
可选地，当不同中心单元LTM切换完成则将候选小区视为是服务小区(Serving cell)。
可选地，终端设备接收新的调度则视为不同中心单元LTM切换完成，具体可参考R18版本协议TS 38.321中LTM切换完成方式确定。
可选地，在LTM切换完成后第二主节点发送更新的小区无线网络临时标识；终端设备依据更新的小区无线网络临时标识发送和/或接收控制信息。
通过本实施例技术方案，具体包括在LTM切换的初始执行阶段，使终端设备通过判断中心单元标识明确相应切换流程处理方式，和/或，减少不同中心单元切换重配信令开销，和/或，减少LTM切换处理复杂度。
第五实施例
在本申请前述任一实施例的基础上，本实施例进一步公开了前述实施例中的切换方法。
可选地，从第一主节点执行LTM切换至第二主节点后，终端设备依据层一测量配置执行测量，并上报测量结果至第二主节点。
可选地，终端设备可以依据测量资源持续上报测量结果，和/或，终端设备还可以在测量结果满足测量事件后上报测量结果。
可选地，第二主节点下发下行控制信息。
可选地，下行控制信息包括小区标识，使终端设备基于小区标识信息确定发送随机接入前导的小区。
可选地，终端设备通过小区标识信息索引不同中心单元LTM切换配置和/或相同中心单元LTM切换配置，确定发送随机接入前导的小区，例如：第三主节点。
可选地，第三主节点可以就是第一主节点，也可以是不同于第一主节点的其它主节点，本实施例对此不构成具体限定。
可选地，终端设备通过小区标识信息索引提前上行同步配置，依据上行同步配置发送随机接入前导至第三主节点。
可选地，第三主节点响应终端设备发送的随机接入前导，发送反馈信息给第二主节点，可选地，反馈信息携带候选小区时间提前。
可选地，所述反馈信息可以是切换成功信令或是其他基站间交互信令携带，本实施例中对此不进行具体限定。
可选地，所述反馈信息还携带参数：上行调度和/或小区无线网络临时标识。
可选地，第二主节点下发LTM切换命令，可选地，LTM切换命令携带标识信息，触发终端设备依据标识信息执行LTM切换。
可选地，所述LTM切换命令触发不同中心单元间的LTM切换。可选地，所述标识信息为小区标识和/或候选小区标识。
可选地，所述LTM切换命令携带内容还包括：第三主节点反馈的信息参数，包括时间提前、上行调度以及小区无线网络临时标识中的至少一项。
可选地，终端设备依据LTM切换命令标识信息确定候选小区，并执行LTM切换至候选小区。
可选地，LTM切换包括以下至少一项：
通过标识信息索引不同中心单元LTM切换配置和/或相同中心单元LTM切换配置，确定执行LTM切换小区和/或小区配置，例如：第三主节点；
依据确定LTM切换小区的中心单元标识以及服务小区中心单元标识判断是否为不同中心单元LTM切换，例如：当确定LTM切换小区的中心单元标识与服务小区中心单元标识相同，则视为相同中心单元切换；和/或，当确定LTM切换小区的中心单元标识与服务小区中心单元标识不同，则视为不同中心单元切换；
依据上行调度发送无线资源控制重配完成和/或首个上行数据；
依据时间提前执行免随机接入切换；
应用小区无线网络临时标识；
应用小区参考配置；
应用候选小区配置。
可选地，当LTM切换为相同中心单元切换，则包括以下至少一项：不释放小区无线网络临时标识、不释放接入层主密钥、保留PDCP配置、保留SDAP配置，以及依据不重置标识判断是否执行RLC重建，具体可参考R18协议TS 38.331。
可选地，当LTM切换为不同中心单元切换，则执行以下至少一项：释放小区无线网络临时标识；更新主密钥；释放信令承载和或数据承载配置；执行分组数据汇聚协议重建；执行分组数据汇聚协议数据恢复；执行服务数据适配协议重配；执行无线链路控制重建；执行MAC重置；更新服务小区中心单元标识，例如：候选小区中心单元标识取代服务小区中心单元标识；将重置标识视为不相等，例如：服务小区重置标识与候选小区重置标识不同；更新重置标识，例如：候选小区重置标识取代服务小区重置标识；执行全配置(Full Config)具体可参考协议TS 38.331，5.3.5.11。
可选地，第三主节点响应终端设备发送的LTM切换完成信息，发送新的调度并视为LTM切换完成。
可选地，终端设备接收新的调度并视为LTM切换完成。
可选地，所述LTM切换为不同中心单元间LTM切换。
可选地，所述调度包括上行和/或下行调度。
可选地，当不同中心单元LTM切换完成则将候选小区视为是服务小区。
可选地，终端设备接收新的调度则视为不同中心单元LTM切换完成，具体可参考R18版本协议TS 38.321中LTM切换完成方式确定。
可选地，在LTM切换完成后第三主节点发送更新的小区无线网络临时标识；终端设备依据更新的小区无线网络临时标识发送和/或接收控制信息。
通过本实施例技术方案，具体包括在LTM切换的后续执行阶段，终端设备可以从第一主节点执行LTM切换至第二主节点后，连续执行LTM切换至第三主节点，通过中心单元标识实现不同中心单元间的连续切换，减少不同中心单元切换重配信令开销，和/或，减少LTM切换处理复杂度，和/或，提高了LTM切换的适用性。
第六实施例
参照图7，图7为根据第六实施例示出的切换方法的流程示意图，本实施例的所述方法可应用于主节点(如基站)，包括步骤：
S1：发送小区配置，以供终端设备基于小区配置执行LTM切换。
可选地，本实施例中主节点包括第一主节点、第二主节点以及第三主节点中的至少一项。
可选地，第一主节点为终端设备初始连接的基站。
可选地，第一主节点发送切换请求信令给至少一个其他主节点，例如：第二主节点和/或第三主节点，本实施例中以第一主节点发送切换请求信令至第二主节点为例进行说明。
可选地，各主节点为不同中心单元的基站，例如：gNB。
可选地，至少一个其他主节点(如第二主节点)响应第一主节点发送的切换请求，反馈切换请求确认。
可选地，反馈的切换请求确认中可以携带包括相同中心单元候选小区配置和/或不同中心单元切换配置。
可选地，第一主节点下发下行控制信息至终端设备。
可选地，下行控制信息包括小区标识信息，终端设备可以基于小区标识信息确定发送随机接入前导的小区。
可选地，终端设备依据下行控制信息携带的小区标识信息确认候选小区配置，依据候选小区配置执行提前上行同步，例如：发送随机接入前导。
可选地，终端设备通过小区标识信息索引不同中心单元LTM切换配置和/或相同中心单元LTM切换配置，确定发送随机接入前导的小区。
可选地，终端设备还通过小区标识信息索引提前上行同步配置，依据上行同步配置发送随机接入前导。
可选地，第一主节点下发LTM切换命令至终端设备。
可选地，LTM切换命令携带标识信息，用于触发终端设备依据标识信息执行LTM切换。
可选地，LTM切换命令触发不同中心单元间的LTM切换。
可选地，LTM切换命令携带的标识信息为小区标识和/或候选小区标识。
可选地，LTM切换命令携带的内容还包括：第二主节点反馈的信息参数，包括时间提前、上行调度以及小区无线网络临时标识中的至少一项。
可选地，终端设备依据LTM切换命令中携带的标识信息确定候选小区并执行LTM切换至候选小区。
可选地，终端设备通过标识信息索引不同中心单元LTM切换配置和/或相同中心单元LTM切换配置，确定执行LTM切换小区和/或小区配置。
可选地，终端设备依据确定LTM切换小区的中心单元标识(又称为候选小区中心单元标识)以及服务小区中心单元标识，判断是否为不同中心单元LTM切换，例如：当候选小区中心单元标识与服务小区中心单元标识相同，则视为相同中心单元切换；和/或，当候选小区中心单元标识与服务小区中心单元标识不同，则视为不同中心单元切换。
可选地，终端设备依据上行调度发送无线资源控制重配完成和/或首个上行数据至第二主节点。
可选地，终端设备依据时间提前执行免随机接入切换。
可选地，在LTM切换过程中，还包括应用小区无线网络临时标识、应用小区参考配置以及应用候选小区配置中的至少一项。
可选地，当LTM切换为相同中心单元切换，则不释放小区无线网络临时标识、不释放接入层主密钥、保留PDCP配置、保留SDAP配置、依据不重置标识判断是否执行RLC重建等，具体可参考R18协议TS 38.331。
可选地，当LTM切换为不同中心单元切换，则包括以下至少一项：
终端设备释放小区无线网络临时标识；
终端设备更新主密钥；
终端设备释放信令承载和或数据承载配置；
终端设备执行分组数据汇聚协议重建；
终端设备执行服务数据适配协议重配；
终端设备执行无线链路控制重建；
终端设备执行媒体接入控制重置；
终端设备更新服务小区中心单元标识；
终端设备将重置标识视为不相同；
终端设备更新重置标识；
终端设备执行全配置。
可选地，第二主节点响应终端设备发送的LTM切换完成信息，发送新的调度并视为LTM切换完成。
可选地，终端设备接收新的调度并视为LTM切换完成。
可选地，所述LTM切换为不同中心单元间LTM切换。
可选地，所述调度包括上行和/或下行调度。
可选地，当不同中心单元LTM切换完成则将候选小区视为是服务小区。
通过本实施例技术方案，具体通过发送小区配置，以供终端设备基于小区配置执行LTM切换，完善了LTM切换的机制，使LTM切换方式不仅支持相同中心单元下的连续切换，还支持不同中心单元间的切换，提高了LTM切换的适用性。
第七实施例
参照图8，图8为根据第七实施例示出的交互时序示意图。
在本实施例中，第一主节点发送小区配置至终端设备(如：手机)，以供终端设备基于小区配置执行LTM切换至第二主节点，并进一步从第二主节点后续执行LTM切换至第三主节点。
可选地，第一主节点为终端设备初始连接的基站。
可选地，第一主节点发送切换请求信令至第二主节点和/或第三主节点。
可选地，各主节点为不同中心单元的基站，例如：gNB。
可选地，第二主节点和/或第三主节点响应第一主节点发送的切换请求，反馈切换请求确认。
可选地，反馈的切换请求确认中可以携带包括相同中心单元候选小区配置和/或不同中心单元切换配置，可选地，所述相同中心单元候选小区配置和/或不同中心单元候选小区配置包括中心单元标识。
可选地，中心单元标识还可以通过第一主节点配置。
可选地，第一主节点通过无线资源控制重配(RRCReconfiguration)信令发送不同中心单元LTM切换配置和/或相同中心单元LTM切换配置。
可选地，相同中心单元LTM切换配置可以是LTM-Config，主要包括以下至少一项：候选小区标识、参考配置、候选小区配置(LTM-Candidate)、提前上行同步配置、配置调度配置、服务小区不重置标识、不重置标识，具体细节可以参考协议TS 38.331。
可选地，相同中心单元LTM切换配置还包括候选小区中心单元标识和/或服务小区中心单元标识，例如：ltm-CU-Id和/或ltm-ServingCellCU-Id。
可选地，不同中心单元LTM切换配置包括：中心单元标识和/或LTM配置(LTM-Config)，可选地，LTM配置内容可参考相同中心单元LTM切换配置。
可选地，中心单元标识还可以配置于LTM配置中。
可选地，中心单元标识用于LTM切换识别不同中心单元和/或主节点。
可选地，中心单元标识还可以用于索引不同中心单元小区配置。
可选地，不同中心单元LTM切换配置包括通过新引入的信息栏位(IE，Information Element)携带，例如：ltm-InterCU-config，用于区分相同中心单元配置，本实施例中对此不进行具体限定。
可选地，无线资源控制重配还包括层一测量配置，例如：层一测量事件(Event)、测量资源以及上报资源中的至少一项。
可选地，终端设备依据层一测量配置执行测量并上报测量结果。
可选地，终端设备可以依据测量资源持续上报测量结果，和/或，终端设备还可以在测量结果满足测量事件后上报测量结果。
可选地，第一主节点下发下行控制信息至终端设备。
可选地，下行控制信息包括小区标识信息，终端设备可以基于小区标识信息确定发送随机接入前导的小区。
可选地，终端设备依据下行控制信息携带的小区标识信息确认候选小区配置，依据候选小区配置执行提前上行同步，例如：发送随机接入前导。
可选地，终端设备通过小区标识信息索引不同中心单元LTM切换配置和/或相同中心单元LTM切换配置，确定发送随机接入前导的小区。
可选地，终端设备还通过小区标识信息索引提前上行同步配置，依据上行同步配置发送随机接入前导。
可选地，网络设备下发下行控制信息触发终端设备执行提前上行同步，可以是在终端设备上报测量结果之前的任意时刻，和/或，在下发LTM切换命令之前的任意时刻。
可选地，第二主节点响应终端设备发送的随机接入前导，发送反馈信息给第一主节点，可选地，反馈信息携带候选小区时间提前。
可选地，所述反馈信息可以是切换成功信令或是其他基站间交互信令携带，本实施例中对此不进行具体限定。
可选地，第一主节点收到第二主节点反馈信息后，通过中心单元分散单元时间提前信息发送信令，和/或，通过分散单元中心单元时间提前信息发送信令，将时间提前信息转送给当前的服务小区。
可选地，第一主节点下发LTM切换命令至终端设备。
可选地，LTM切换命令携带标识信息，用于触发终端设备依据标识信息执行LTM切 换。
可选地，LTM切换命令触发不同中心单元间的LTM切换。
可选地，LTM切换命令携带的标识信息为小区标识和/或候选小区标识。
可选地，LTM切换命令携带的内容还包括：第二主节点反馈的信息参数，包括时间提前、上行调度以及小区无线网络临时标识中的至少一项。
可选地，终端设备依据LTM切换命令中携带的标识信息确定候选小区并执行LTM切换至候选小区。
可选地，终端设备通过标识信息索引不同中心单元LTM切换配置和/或相同中心单元LTM切换配置，确定执行LTM切换小区和/或小区配置。
可选地，终端设备依据确定LTM切换小区的中心单元标识(又称为候选小区中心单元标识)以及服务小区中心单元标识，判断是否为不同中心单元LTM切换，例如：当候选小区中心单元标识与服务小区中心单元标识相同，则视为相同中心单元切换；和/或，当候选小区中心单元标识与服务小区中心单元标识不同，则视为不同中心单元切换。
可选地，终端设备依据上行调度发送无线资源控制重配完成和/或首个上行数据至第二主节点。
可选地，终端设备依据时间提前执行免随机接入切换。
可选地，在LTM切换过程中，还包括应用小区无线网络临时标识、应用小区参考配置以及应用候选小区配置中的至少一项。
可选地，当LTM切换为相同中心单元切换，则不释放小区无线网络临时标识、不释放接入层主密钥、保留PDCP配置、保留SDAP配置、依据不重置标识判断是否执行RLC重建等，具体可参考R18协议TS 38.331。
可选地，当LTM切换为不同中心单元切换，则执行以下至少一项：释放小区无线网络临时标识；更新主密钥；释放信令承载和或数据承载配置；执行分组数据汇聚协议重建；执行分组数据汇聚协议数据恢复；执行服务数据适配协议重配；执行无线链路控制重建；执行MAC重置；更新服务小区中心单元标识，例如：候选小区中心单元标识取代服务小区中心单元标识；将重置标识视为不相等，例如：服务小区重置标识与候选小区重置标识不同；更新重置标识，例如：候选小区重置标识取代服务小区重置标识；执行全配置具体可参考协议TS 38.331，5.3.5.11。
可选地，第二主节点响应终端设备发送的LTM切换完成信息，发送新的调度并视为LTM切换完成。
可选地，终端设备接收新的调度并视为LTM切换完成。
可选地，所述LTM切换为不同中心单元间LTM切换。
可选地，所述调度包括上行和/或下行调度。
可选地，当不同中心单元LTM切换完成则将候选小区视为是服务小区。
可选地，终端设备接收新的调度则视为不同中心单元LTM切换完成，具体可参考R18版本协议TS 38.321中LTM切换完成方式确定。
可选地，在LTM切换完成后第二主节点发送更新的小区无线网络临时标识；终端设备依据更新的小区无线网络临时标识发送和/或接收控制信息。
可选地，从第一主节点执行LTM切换至第二主节点后，终端设备依据层一测量配置执行测量，并上报测量结果至第二主节点。
可选地，终端设备可以依据测量资源持续上报测量结果，和/或，终端设备还可以在测量结果满足测量事件后上报测量结果。
可选地，第二主节点下发下行控制信息，可选地，下行控制信息包括小区标识，使终端设备基于小区标识信息确定发送随机接入前导的小区。
可选地，终端设备通过小区标识信息索引不同中心单元LTM切换配置和/或相同中心单元LTM切换配置，确定发送随机接入前导的小区，例如：第三主节点。
可选地，第三主节点可以就是第一主节点，也可以是不同于第一主节点的其它主节点，本实施例对此不构成具体限定。
可选地，终端设备通过小区标识信息索引提前上行同步配置，依据上行同步配置发送随机接入前导至第三主节点。
可选地，第三主节点响应终端设备发送的随机接入前导，发送反馈信息给第二主节点。
可选地，反馈信息携带候选小区时间提前。
可选地，所述反馈信息可以是切换成功信令或是其他基站间交互信令携带，本实施例中对此不进行具体限定。
可选地，所述反馈信息还携带参数：上行调度和/或小区无线网络临时标识。
可选地，第二主节点下发LTM切换命令。
可选地，LTM切换命令携带标识信息，触发终端设备依据标识信息执行LTM切换。
可选地，所述LTM切换命令触发不同中心单元间的LTM切换。
可选地，所述标识信息为小区标识和/或候选小区标识。
可选地，所述LTM切换命令携带内容还包括：第三主节点反馈的信息参数，包括时间提前、上行调度以及小区无线网络临时标识中的至少一项。
可选地，终端设备依据LTM切换命令标识信息确定候选小区，并执行LTM切换至候选小区。
可选地，当LTM切换为相同中心单元切换，则包括以下至少一项：不释放小区无线网络临时标识、不释放接入层主密钥、保留PDCP配置、保留SDAP配置，以及依据不重置标识判断是否执行RLC重建，具体可参考R18协议TS 38.331。
可选地，当LTM切换为不同中心单元切换，则执行以下至少一项：释放小区无线网络临时标识；更新主密钥；释放信令承载和或数据承载配置；执行分组数据汇聚协议重建；执行分组数据汇聚协议数据恢复；执行服务数据适配协议重配；执行无线链路控制重建；执行MAC重置；更新服务小区中心单元标识，例如：候选小区中心单元标识取代服务小区中心单元标识；将重置标识视为不相等，例如：服务小区重置标识与候选小区重置标识不同；更新重置标识，例如：候选小区重置标识取代服务小区重置标识；执行全配置，具体可参考协议TS 38.331，5.3.5.11。
可选地，第三主节点响应终端设备发送的LTM切换完成信息，发送新的调度并视为LTM切换完成。
可选地，终端设备接收新的调度并视为LTM切换完成。
可选地，所述LTM切换为不同中心单元间LTM切换。
可选地，所述调度包括上行和/或下行调度。
可选地，当不同中心单元LTM切换完成则将候选小区视为是服务小区。
可选地，终端设备接收新的调度则视为不同中心单元LTM切换完成，具体可参考R18版本协议TS 38.321中LTM切换完成方式确定。
可选地，在LTM切换完成后第三主节点发送更新的小区无线网络临时标识；终端设备依据更新的小区无线网络临时标识发送和/或接收控制信息。
通过本实施例技术方案，具体包括通过发送小区配置至终端设备，以供终端设备基于小区配置执行LTM切换至第二主节点，并进一步从第二主节点连续执行LTM切换至第三主节点，在此过程中通过判断中心单元标识，明确相应切换流程的处理方式，和/或，减少不同中心单元切换重配信令开销，和/或，减少LTM切换处理复杂度，和/或，提高了LTM切换的适用性。
请参见图9，图9为本申请实施例提供的切换装置的结构示意图一，该装置可搭载在或就是上述方法实施例中的终端设备。图9所示的切换装置可以用于执行上述实施例所描述的方法实施例中的部分或全部功能。如图9所示，该切换装置1100包括：
切换模块1101，用于基于小区配置执行LTM切换。
可选地，所述装置还包括以下至少一项：
小区配置包括中心单元标识和/或候选小区配置；
小区配置由第一主节点配置；
小区配置用于向至少一主节点中的候选小区执行切换；
LTM切换包括不同中心单元切换和/或相同中心单元切换。
可选地，所述装置还包括以下至少一项：
中心单元标识包括服务小区中心单元标识和/或候选小区中心单元标识；
至少一主节点包括第二主节点和/或第三主节点。
可选地，基于小区配置执行LTM切换，包括以下至少一项：
若服务小区中心单元标识和候选小区中心单元标识不相同，则执行不同中心单元切换；
若服务小区中心单元标识和候选小区中心单元标识相同，则执行相同中心单元切换。
可选地，所述执行不同中心单元切换，包括以下至少一项：
释放小区无线网络临时标识；
更新主密钥；
释放信令承载和/或数据承载配置；
执行分组数据汇聚协议重建；
执行服务数据适配协议重配；
执行无线链路控制重建；
执行媒体接入控制重置；
更新服务小区中心单元标识；
将重置标识视为不相同；
更新重置标识；
执行全配置。
可选地，所述装置还包括以下至少一项：
基于切换命令确定至少一主节点中的候选小区；
基于无线资源控制信令确定小区配置；
接收第二主节点发送的更新的小区无线网络临时标识；
根据更新的小区无线网络临时标识发送和/或接收控制信息。
本申请实施例提供的切换装置可以执行上述方法实施例所示的技术方案，其实现原理以及有益效果类似，此处不再进行赘述。
请参见图10，图10为本申请实施例提供的切换装置的结构示意图二，该装置可搭载在或就是上述方法实施例中的网络设备。图10所示的切换装置可以用于执行上述实施例所描述的方法实施例中的部分或全部功能。如图10所示，该切换装置1200包括：
发送模块1201，用于发送小区配置，以供终端设备基于小区配置执行LTM切换。
可选地，所述装置还包括以下至少一项：
发送切换请求信令给至少一主节点；
接收至少一主节点发送的切换请求反馈和/或切换请求确认；
通过无线资源控制重配信令发送小区配置至终端设备。
可选地，所述装置还包括以下至少一项：
小区配置携带于切换请求反馈和/或切换请求确认；
小区配置包括中心单元标识和/或候选小区配置；
小区配置用于向至少一主节点中的候选小区执行切换；
LTM切换包括不同中心单元切换和/或相同中心单元切换。
可选地，所述中心单元标识包括服务小区中心单元标识和/或候选小区中心单元标识。
可选地，所述装置还包括以下至少一项：
若服务小区中心单元标识和候选小区中心单元标识不相同，则终端设备执行不同中心单元切换；
若服务小区中心单元标识和候选小区中心单元标识相同，则终端设备执行相同中心单元切换。
可选地，所述终端设备执行不同中心单元切换，包括以下至少一项：
终端设备释放小区无线网络临时标识；
终端设备更新主密钥；
终端设备释放信令承载和或数据承载配置；
终端设备执行分组数据汇聚协议重建；
终端设备执行服务数据适配协议重配；
终端设备执行无线链路控制重建；
终端设备执行媒体接入控制重置；
终端设备更新服务小区中心单元标识；
终端设备将重置标识视为不相同；
终端设备更新重置标识；
终端设备执行全配置。
本申请实施例提供的切换装置可以执行上述方法实施例所示的技术方案，其实现原理以及有益效果类似，此处不再进行赘述。
参阅图11，图11为本申请实施例提供的通信设备的结构示意图。如图11所示，本实施例所述的通信设备160可以是前述方法实施例中提到的终端设备(或者可用于终端设备的部件)或者网络设备(或者可用于网络设备的部件)。通信设备160可用于实现上述方法实施例中描述的对应于终端设备或者网络设备的方法，具体参见上述方法实施例中的说明。
通信设备160可以包括一个或多个处理器161，该处理器161也可以称为处理单元， 可以实现一定的控制或者处理功能。处理器161可以是通用处理器或者专用处理器等。例如可以是基带处理器、或中央处理器。基带处理器可以用于对通信协议以及通信数据进行处理，中央处理器可以用于对通信设备进行控制，执行软件程序，处理软件程序的数据。
可选地，处理器161也可以存有指令163或者数据(例如中间数据)。可选地，指令163可以被处理器161运行，使得通信设备160执行上述方法实施例中描述的对应于终端设备或者网络设备的方法。
可选地，通信设备160可以包括电路，该电路可以实现前述方法实施例中发送或接收或者通信的功能。
可选地，通信设备160中可以包括一个或多个存储器162，其上可以存有指令164，该指令可在处理器161上被运行，使得通信设备160执行上述方法实施例中描述的方法。
可选地，存储器162中也可以是存储有数据。处理器161和存储器162可以单独设置，也可以集成在一起。
可选地，通信设备160还可以包括收发器165和/或天线166。处理器161可以称为处理单元，对通信设备160(终端设备或核心网设备或者无线接入网设备)进行控制。收发器165可以称为收发单元、收发机、收发电路、或者收发器等，用于实现通信设备160的收发功能。
可选地，若该通信设备160用于实现对应于上述各实施例中终端设备的操作时，例如，可以由收发器165接收小区配置；以及，由处理器161基于小区配置执行LTM切换。
可选地，处理器161和收发器165的具体实现过程可以参见上述各实施例的相关描述，此处不再赘述。
可选地，若该通信设备160用于实现对应于上述各实施例中网络设备的操作时，例如：可以由收发器165发送小区配置，以供终端设备基于小区配置执行LTM切换。
可选地，处理器161和收发器165的具体实现过程可以参见上述各实施例的相关描述，此处不再赘述。
本申请中描述的处理器161和收发器165可实现在IC(Integrated Circuit，集成电路)、模拟集成电路、RFIC(Radio Frequency Integrated Circuit，射频集成电路)、混合信号集成电路、ASIC(Application Specific Integrated Circuit，专用集成电路)、PCB(Printed Circuit Board，印刷电路板)、电子设备等上。该处理器161和收发器165也可以用各种集成电路工艺技术来制造，例如CMOS(Complementary Metal Oxide Semiconductor，互补金属氧化物半导体)、NMOS(N Metal-Oxide-Semiconductor，N型金属氧化物半导体)、PMOS(Positive channel Metal Oxide Semiconductor，P型金属氧化物半导体)、BJT(Bipolar Junction Transistor，双极结型晶体管)、双极CMOS(BiCMOS)、硅锗(SiGe)、砷化镓(GaAs)等。
本申请中，通信设备可以为终端设备(如手机)，也可以为网络设备(如基站)，具体需要根据上下文来加以确定，另外，终端设备可以以各种形式来实施。例如，本申请中描述的终端设备可以包括诸如手机、平板电脑、笔记本电脑、掌上电脑、个人数字助理(Personal Digital Assistant，PDA)、便捷式媒体播放器(Portable Media Player，PMP)、导航装置、可穿戴设备、智能手环、计步器等移动终端，以及诸如数字TV、台式计算机等固定终端设备。
虽然在以上的实施例描述中，通信设备以终端设备或者网络设备为例来描述，但本申请中描述的通信设备的范围并不限于上述终端设备或网络设备，而且通信设备的结构可以不受图11的限制。通信设备可以是独立的设备或者可以是较大设备的一部分。
本申请实施例还提供一种通信系统，包括：如上任一实施例中的终端设备；以及，如上任一实施例中的网络设备。
本申请实施例还提供一种通信设备，包括存储器、处理器，存储器上存储有切换程序，切换程序被处理器执行时实现上述任一实施例中的切换方法的步骤。
本申请中的通信设备，可以是终端设备(如手机)，也可以是网络设备(如基站)，具体所指，需要根据上下文加以明确。
本申请实施例还提供一种存储介质，存储介质上存储有切换程序，切换程序被处理器执行时实现上述任一实施例中的切换方法的步骤。
在本申请实施例提供的通信设备和存储介质的实施例中，可以包含任一上述切换方法实施例的全部技术特征，说明书拓展和解释内容与上述方法的各实施例基本相同，在此不再做赘述。
本申请实施例还提供一种计算机程序产品，计算机程序产品包括计算机程序代码，当计算机程序代码在计算机上运行时，使得计算机执行如上各种可能的实施方式中的方法。
本申请实施例还提供一种芯片，包括存储器和处理器，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计算机程序，使得安装有芯片的设备执行如上各种可能的实施方式中的方法。
可以理解，上述场景仅是作为示例，并不构成对于本申请实施例提供的技术方案的应用场景的限定，本申请的技术方案还可应用于其他场景。例如，本领域普通技术人员可知，随着系统架构的演变和新业务场景的出现，本申请实施例提供的技术方案对于类似的技术问题，同样适用。
上述本申请实施例序号仅仅为了描述，不代表实施例的优劣。
本申请实施例方法中的步骤可以根据实际需要进行顺序调整、合并和删减。
本申请实施例设备中的单元可以根据实际需要进行合并、划分和删减。
在本申请中，对于相同或相似的术语概念、技术方案和/或应用场景描述，一般只在第一次出现时进行详细描述，后面再重复出现时，为了简洁，一般未再重复阐述，在理解本申请技术方案等内容时，对于在后未详细描述的相同或相似的术语概念、技术方案和/或应用场景描述等，可以参考其之前的相关详细描述。
在本申请中，对各个实施例的描述都各有侧重，某个实施例中没有详述或记载的部分，可以参见其它实施例的相关描述。
本申请技术方案的各技术特征可以进行任意的组合，为使描述简洁，未对上述实施例中的各个技术特征所有可能的组合都进行描述，然而，只要这些技术特征的组合不存在矛盾，都应当认为是本申请记载的范围。
通过以上的实施方式的描述，本领域的技术人员可以清楚地了解到上述实施例方法可借助软件加必需的通用硬件平台的方式来实现，当然也可以通过硬件，但很多情况下前者是更佳的实施方式。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如上的一个存储介质(如ROM/RAM、磁碟、光盘)中，包括若干指令用以使得一台终端设备(可以是手机，计算机，服务器，被控终端设备，或者网络设备等)执行本申请每个实施例的方法。
在上述实施例中，可以全部或部分地通过软件、硬件、固件或者其任意组合来实现。当使用软件实现时，可以全部或部分地以计算机程序产品的形式实现。计算机程序产品包括一个或多个计算机指令。在计算机上加载和执行计算机程序指令时，全部或部分地产生按照本申请实施例的流程或功能。计算机可以是通用计算机、专用计算机、计算机网络，或者其他可编程装置。计算机指令可以存储在存储介质中，或者从一个存储介质向另一个存储介质传输，例如，计算机指令可以从一个网站站点、计算机、服务器或数据中心通过有线(例如同轴电缆、光纤、数字用户线)或无线(例如红外、无线、微波等)方式向另一个网站站点、计算机、服务器或数据中心进行传输。存储介质可以是计算机能够存取的任何可用介质或者是包含一个或多个可用介质集成的服务器、数据中心等数据存储设备。可用介质可以是磁性介质，(例如，软盘、存储盘、磁带)、光介质(例如，DVD)，或者半导体介质(例如固态存储盘Solid State Disk(SSD))等。
以上仅为本申请的优选实施例，并非因此限制本申请的专利范围，凡是利用本申请说明书及附图内容所作的等效结构或等效流程变换，或直接或间接运用在其他相关的技术领域，均同理包括在本申请的专利保护范围内。

Claims (14)

  1. 一种切换方法，其中，包括步骤：
    S2：基于小区配置执行LTM切换。
  2. 如权利要求1所述的方法，其中，还包括以下至少一项：
    小区配置包括中心单元标识和/或候选小区配置；
    小区配置由第一主节点配置；
    小区配置用于向至少一主节点中的候选小区执行切换；
    LTM切换包括不同中心单元切换和/或相同中心单元切换。
  3. 如权利要求2所述的方法，其中，还包括以下至少一项：
    中心单元标识包括服务小区中心单元标识和/或候选小区中心单元标识；
    至少一主节点包括第二主节点和/或第三主节点。
  4. 如权利要求3中所述的方法，其中，步骤S2，包括以下至少一项：
    若服务小区中心单元标识和候选小区中心单元标识不相同，则执行不同中心单元切换；
    若服务小区中心单元标识和候选小区中心单元标识相同，则执行相同中心单元切换。
  5. 如权利要求4中所述的方法，其中，所述执行不同中心单元切换，包括以下至少一项：
    释放小区无线网络临时标识；
    更新主密钥；
    释放信令承载和/或数据承载配置；
    执行分组数据汇聚协议重建；
    执行服务数据适配协议重配；
    执行无线链路控制重建；
    执行媒体接入控制重置；
    更新服务小区中心单元标识；
    将重置标识视为不相同；
    更新重置标识；
    执行全配置。
  6. 如权利要求1所述的方法，其中，还包括以下至少一项：
    基于切换命令确定至少一主节点中的候选小区；
    基于无线资源控制信令确定小区配置；
    接收第二主节点发送的更新的小区无线网络临时标识；
    根据更新的小区无线网络临时标识发送和/或接收控制信息。
  7. 一种切换方法，其中，包括步骤：
    S1：发送小区配置，以供终端设备基于小区配置执行LTM切换。
  8. 如权利要求7所述的方法，其中，还包括以下至少一项：
    发送切换请求信令给至少一主节点；
    接收至少一主节点发送的切换请求反馈和/或切换请求确认；
    通过无线资源控制重配信令发送小区配置至终端设备。
  9. 如权利要求8所述的方法，其中，还包括以下至少一项：
    小区配置携带于切换请求反馈和/或切换请求确认；
    小区配置包括中心单元标识和/或候选小区配置；
    小区配置用于向至少一主节点中的候选小区执行切换；
    LTM切换包括不同中心单元切换和/或相同中心单元切换。
  10. 如权利要求9所述的方法，其中，所述中心单元标识包括服务小区中心单元标识和/或候选小区中心单元标识。
  11. 如权利要求10中所述的方法，其中，还包括以下至少一项：
    若服务小区中心单元标识和候选小区中心单元标识不相同，则终端设备执行不同中心单元切换；
    若服务小区中心单元标识和候选小区中心单元标识相同，则终端设备执行相同中心单元切换。
  12. 如权利要求11中所述的方法，其中，所述终端设备执行不同中心单元切换，包括以下至少一项：
    终端设备释放小区无线网络临时标识；
    终端设备更新主密钥；
    终端设备释放信令承载和或数据承载配置；
    终端设备执行分组数据汇聚协议重建；
    终端设备执行服务数据适配协议重配；
    终端设备执行无线链路控制重建；
    终端设备执行媒体接入控制重置；
    终端设备更新服务小区中心单元标识；
    终端设备将重置标识视为不相同；
    终端设备更新重置标识；
    终端设备执行全配置。
  13. 一种通信设备，其中，包括：存储器、处理器及存储在所述存储器上并可在所述处理器上运行的切换程序，所述切换程序被所述处理器执行时实现如权利要求1或7所述的切换方法的步骤。
  14. 一种存储介质，其中，所述存储介质上存储有计算机程序，所述计算机程序被处理器执行时实现如权利要求1或7所述的切换方法的步骤。
PCT/CN2024/073086 2024-01-18 2024-01-18 切换方法、通信设备及存储介质 Pending WO2025007546A1 (zh)

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