WO2024168601A1 - 小区切换方法、通信设备及存储介质 - Google Patents

小区切换方法、通信设备及存储介质 Download PDF

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Publication number
WO2024168601A1
WO2024168601A1 PCT/CN2023/076233 CN2023076233W WO2024168601A1 WO 2024168601 A1 WO2024168601 A1 WO 2024168601A1 CN 2023076233 W CN2023076233 W CN 2023076233W WO 2024168601 A1 WO2024168601 A1 WO 2024168601A1
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WIPO (PCT)
Prior art keywords
cell
candidate
index value
cell index
candidate cell
Prior art date
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PCT/CN2023/076233
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English (en)
French (fr)
Inventor
高正立
黄钧蔚
Original Assignee
深圳传音控股股份有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Publication date
Application filed by 深圳传音控股股份有限公司 filed Critical 深圳传音控股股份有限公司
Priority to CN202380020601.6A priority Critical patent/CN118830293A/zh
Priority to PCT/CN2023/076233 priority patent/WO2024168601A1/zh
Publication of WO2024168601A1 publication Critical patent/WO2024168601A1/zh

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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 cell switching method, communication equipment and storage medium.
  • L1/L2 Layer 1/layer 2
  • the main purpose of the present application is to provide a cell switching method, a communication device and a storage medium, aiming to solve the problem of enabling a terminal device to identify a candidate cell during a cell switching process based on L1/L2 signaling.
  • the present application provides a cell switching method, which can be applied to a terminal device (such as a mobile phone), comprising the following steps:
  • S2 Perform cell switching based on at least one of radio resource control signaling, downlink control information, random access response and cell switching command.
  • the method further comprises at least one of the following:
  • the radio resource control signaling includes candidate cell configuration and/or indication information parameters
  • the downlink control information includes at least one of a source cell determination field, an indication information field, a layer 1/layer 2 candidate index value, and a candidate cell index value.
  • the candidate cell configuration includes at least one of a candidate cell index value, a layer 1/layer 2 candidate index value, a candidate cell index value list, and a cell index value list.
  • step S2 comprises the steps of:
  • S21 transmitting a physical random access channel based on downlink control information, and receiving a random access response and/or a cell switching command;
  • S23 Select or determine a target cell according to the downlink control information and/or the cell switching command;
  • S24 Determine or generate a confirmation message, and send the confirmation message to the target cell based on the uplink resource indication information.
  • step S2 further includes at least one of the following:
  • a correspondence between a candidate cell index value and a cell index value of a candidate cell is selected or determined based on the cell index value list and the candidate cell index value list.
  • the transmitting a physical random access channel based on downlink control information includes at least one of the following:
  • a physical random access channel is transmitted to the corresponding cell.
  • step S22 includes at least one of the following:
  • the uplink resource indication information is selected or determined from the random access response and/or the cell switching command according to the value of the indication information field or parameter.
  • the step S23 includes at least one of the following:
  • the target cell is obtained according to the layer 1/layer 2 candidate index value, the candidate cell index value in the cell switching command, and at least one item in the candidate cell index value list and the cell index value list in the cell group configuration information element.
  • the confirmation message includes layer 1/layer 2 candidate index values and/or candidate cell index values.
  • the present application also provides a cell switching method, which can be applied to a network device (such as a base station), comprising the following steps:
  • S1 Send downlink information so that the terminal device can switch cells based on the downlink information.
  • the method further comprises at least one of the following:
  • the downlink information includes at least one of the following: radio resource control signaling, downlink control information, random access response and/or cell switching command;
  • the method further comprises at least one of the following:
  • the step before the step of sending downlink control information, the step also includes adding at least one of a source cell determination field, an indication information field, a layer 1/layer 2 candidate index value field, and a candidate cell index value field to the downlink control information.
  • the present application also provides a communication device, comprising: a memory, a processor, and a cell switching program stored in the memory and executable on the processor, wherein the cell switching program implements the steps of any of the cell switching methods described above when executed by the processor.
  • the present application also provides a storage medium, wherein a computer program is stored on the storage medium, and when the computer program is executed by a processor, the steps of any of the cell switching methods described above are implemented.
  • the technical solution of the present application performs cell switching based on at least one of wireless resource control signaling, downlink control information, random access response and cell switching command, adds candidate cell identifiers in wireless resource control signaling, downlink control information, random access response and/or cell switching command for L1 and/or L2 signaling transmission, so that the terminal device can identify the candidate cells for cell 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 diagram of a flow chart of a cell switching method according to the first embodiment
  • FIG6 is a schematic flow chart of a cell switching method according to a second embodiment
  • FIG7 is a schematic diagram of a flow chart of a cell switching method according to a third embodiment
  • FIG8 is a schematic flow chart of a cell switching method according to a fourth embodiment
  • FIG9 is a schematic flow chart of a cell switching method according to a fifth embodiment.
  • FIG10 is a schematic flow chart of a cell switching method according to a seventh embodiment
  • FIG11 is a schematic flow chart of a cell switching method according to an eighth embodiment.
  • FIG12 is another schematic flow chart of a cell switching method according to the eighth embodiment.
  • FIG13 is a first structural diagram of a cell switching device provided in an embodiment of the present application.
  • FIG14 is a second structural diagram of a cell switching device provided in an embodiment of the present application.
  • FIG15 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 intelligent terminal devices 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.
  • intelligent terminal devices such as mobile phones, tablet computers, laptop computers, PDAs, portable media players (PMPs), navigation devices, wearable devices, smart bracelets, pedometers, etc.
  • PDAs portable media players
  • navigation devices wearable devices
  • smart bracelets smart bracelets
  • pedometers etc.
  • fixed terminal devices such as digital TVs and desktop computers.
  • FIG1 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 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 and 6G etc.
  • 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 the operation modes such as the telephone call mode, the recording mode, the voice recognition mode, etc., 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 the 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 gravity when stationary.
  • the size and direction of the phone can be used for applications that recognize the phone's posture (such as switching between horizontal and vertical screens, related games, and magnetometer posture calibration), vibration recognition related functions (such as pedometers and tapping), etc.
  • sensors such as fingerprint sensors, pressure sensors, iris sensors, molecular sensors, gyroscopes, barometers, hygrometers, thermometers, infrared sensors, etc., they will not be described in detail here.
  • 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 can 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, can collect user touch operations on or near it (such as operations performed by users using fingers, styluses, or any other suitable objects or accessories on or near the touch panel 1071), and drive the corresponding connection device according to a pre-set program.
  • the touch panel 1071 may include two parts: a touch detection device and a touch controller.
  • the touch detection device detects the user's touch orientation, detects the signal brought by the touch operation, and transmits the signal to the touch controller; the touch controller receives the touch information from the touch detection device, converts it into contact point coordinates, and then sends it to the processor 110, and can receive and execute commands sent by the processor 110.
  • the touch panel 1071 can be implemented in various types such as resistive, capacitive, infrared, and surface acoustic waves.
  • the user input unit 107 may further include other input devices 1072.
  • the other input devices 1072 may include, but are not limited to, one or more of a physical keyboard, a function key (such as a volume control key, a switch key, etc.), a trackball, a mouse, a joystick, etc., which are not specifically limited here.
  • a function key such as a volume control key, a switch key, etc.
  • a trackball such as a mouse, a joystick, etc.
  • 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 here.
  • 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 managing 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.
  • MME 2031 is a control node that processes signaling between UE 201 and EPC 203, providing bearer and connection management.
  • HSS 2032 is used to provide some registers to manage functions such as home location register (not shown in the figure), and save some user-specific information such as service features and data rates. All user data can be sent through SGW2034.
  • PGW2035 can provide IP address allocation and other functions for UE 201.
  • PCRF2036 is the policy and charging control policy decision point for service data flow and IP bearer resources. It selects and provides available policy and charging control decisions for the policy and charging execution functional unit (not shown in the figure).
  • IP services 204 may include the Internet, an intranet, an IMS (IP Multimedia Subsystem) or other IP services, etc.
  • 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 cell switching method according to a first embodiment.
  • the cell 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:
  • S2 Perform cell switching based on at least one of radio resource control signaling, downlink control information, random access response and cell switching command.
  • the L1/L2 candidate configuration information element (e.g., Candidates-L1L2-Config-r18) includes an L1/L2 candidate list parameter to be added and modified (e.g., candidates-L1L2-ToAddModList-r18), the type of which is an L1/L2 candidate list information element to be added and modified (e.g., Candidates-L1L2-ToAddModList-r18), and the information element includes maxNrofL1L2Candidates-r18 to be added.
  • an L1/L2 candidate list parameter to be added and modified e.g., candidates-L1L2-ToAddModList-r18
  • the type of which is an L1/L2 candidate list information element to be added and modified e.g., Candidates-L1L2-ToAddModList-r18
  • the information element includes maxNrofL1L2Candidates-r18 to be added.
  • each L1/L2 candidate information element to be added and modified includes an L1/L2 candidate index value parameter (for example, candidates-L1L2-Id-r18) and an L1/L2 candidate cell configuration parameter (for example, candidates-L1L2-CellsConfig-r18), optionally, the L1/L2 candidate cell configuration parameter is determined by a cell group configuration information element (for example, CellGroupConfig).
  • L1/L2 candidate index value parameter for example, candidates-L1L2-Id-r18
  • an L1/L2 candidate cell configuration parameter for example, candidates-L1L2-CellsConfig-r18
  • the L1/L2 candidate cell configuration parameter is determined by a cell group configuration information element (for example, CellGroupConfig).
  • all candidate cells configured by the L1/L2 candidate information element to be added and modified refer to all candidate cells configured by the cell group configuration information element corresponding to the L1/L2 candidate cell configuration parameter included in the L1/L2 candidate information element to be added and modified.
  • all candidate cells configured by the L1/L2 candidate list information element to be added and modified refer to candidate cells configured by all L1/L2 candidate information elements to be added and modified configured by the L1/L2 candidate list information element to be added and modified, that is, candidate cells configured by the cell group configuration information element corresponding to the L1/L2 candidate cell configuration parameters contained in all L1/L2 candidate information elements to be added and modified.
  • XXXX in the RRCReconfiguration-vXXXX-Ies information element represents the version number, for example: 1530; YYYY in the RRCReconfiguration-vYYY-Ies information element represents the version number, for example: 1540.
  • the candidate cell identifier is used to identify the special cell and/or auxiliary cell in the L1/L2 signaling transmission.
  • the candidate cell identifier includes at least one of a source cell determination field, an indication information field or parameter, an L1/L2 candidate index value field or parameter, a candidate cell index value field or parameter, a candidate cell index value list parameter and a cell index value list parameter.
  • the radio resource control signaling includes candidate cell configuration and/or indication information parameters.
  • the downlink control information includes at least one of a source cell determination field, an indication information field, an L1/L2 candidate index value, and a candidate cell index value.
  • the candidate cell configuration includes at least one of a candidate cell index value, an L1/L2 candidate index value, a candidate cell index value list and a cell index value list.
  • a candidate cell index value is added in the RRC to identify a special cell and/or a secondary cell in L1/L2 information transmission, which may be at least one of the following:
  • DCI Downlink Control Information
  • PDCCH order Physical Downlink Control Channel order
  • a cell identifier is added to the downlink control information to distinguish that the downlink control information triggers the terminal device to perform PRACH transmission to the source cell or a candidate cell, which can be at least one of the following:
  • uplink resources may be obtained in at least one of the following three ways:
  • determining a target cell to send a confirmation message may be at least one of the following:
  • the target cell in the confirmation message may be indicated in at least one of the following three ways:
  • This embodiment adopts the above scheme, specifically by performing cell switching based on at least one of wireless resource control signaling, downlink control information, random access response and cell switching command, adding candidate cell identifiers in wireless resource control signaling, downlink control information, random access response and/or cell switching command for L1 and/or L2 signaling transmission, so that the terminal device can identify the candidate cells for cell switching.
  • FIG. 6 is a flow chart of a cell switching method according to a second embodiment, and the specific steps include:
  • S21 transmitting a physical random access channel based on downlink control information, and receiving a random access response and/or a cell switching command;
  • S23 Select or determine a target cell according to the downlink control information and/or the cell switching command;
  • S24 Determine or generate a confirmation message, and send the confirmation message to the target cell based on the uplink resource indication information.
  • step of transmitting a physical random access channel based on the downlink control information and receiving a random access response and/or a cell switching command at least one of the following is included:
  • a correspondence between a candidate cell index value and a cell index value of a candidate cell is selected or determined based on the cell index value list and the candidate cell index value list.
  • a candidate cell index value parameter is added in the RRC to identify the special cell and/or the secondary cell in L1/L2 information transmission.
  • the candidate cell index value is defined in all candidate cells configured by the to-be-added and modified L1/L2 candidate list information element: all candidate cells configured by the to-be-added and modified L1/L2 candidate list information element are numbered uniformly.
  • a candidate cell index value parameter (e.g., candidateCellIndex) is added to the special cell configuration (e.g., SpCellConfig) information element for identifying the special cell in layer 1/layer 2 (e.g., L1/L2) information transmission, and/or, if the cell group configuration information element (e.g., CellGroupConfig) is configured with a secondary cell configuration (e.g., SCellConfig) information element, a candidate cell index value parameter (e.g., candidateCellIndex) is added to the secondary cell configuration information element for identifying the secondary cell in L1/L2 information transmission.
  • the special cell configuration e.g., SpCellConfig
  • layer 1/layer 2 e.g., L1/L2
  • a candidate cell index value parameter e.g., candidateCellIndex
  • a candidate cell index value is defined in all candidate cells configured by the L1/L2 candidate list information element to be added and modified, indicating that the candidate cell index value parameter (e.g., candidateCellIndex) is uniformly numbered in all candidate cells configured by the L1/L2 candidate list information element to be added and modified.
  • All candidate cells configured by the L1/L2 candidate list information element to be added and modified refer to candidate cells configured by all L1/L2 candidate information elements to be added and modified configured by the L1/L2 candidate list information element to be added and modified, that is, candidate cells configured by the cell group configuration information element corresponding to the L1/L2 candidate cell configuration parameters contained in all L1/L2 candidate information elements to be added and modified.
  • the parameter maxNrofCandidateCells is the maximum number of candidate cells configured by the L1/L2 candidate list information element to be added and modified.
  • only one candidate cell index value parameter can be used to uniquely identify a candidate cell configured in the L1/L2 candidate list information element to be added and modified.
  • the candidate cell index value is defined in all candidate cells configured by the L1/L2 candidate information element to be added and modified: the candidate cell index value is numbered in all candidate cells currently configured by the L1/L2 candidate information element to be added and modified.
  • a candidate cell index value parameter (e.g., candidateCellIndex) is added to the special cell configuration information element for use in The special cell is identified in L1/L2 information transmission, and/or, if the cell group configuration information element is configured with a secondary cell configuration information element, a candidate cell index value parameter is added to the secondary cell configuration information element for identifying the secondary cell in L1/L2 information transmission.
  • a candidate cell index value is defined in all candidate cells configured by the L1/L2 candidate information element to be added and modified, indicating that the candidate cell index value parameter (e.g., candidateCellIndex) is numbered in all candidate cells configured by the current L1/L2 candidate information element to be added and modified.
  • All candidate cells configured by the L1/L2 candidate information element to be added and modified refer to all candidate cells configured by the cell group configuration information element corresponding to the L1/L2 candidate cell configuration parameter contained in the L1/L2 candidate information element to be added and modified.
  • a candidate cell configured in the L1/L2 candidate information element to be added and modified can be uniquely identified by using an L1/L2 candidate index value parameter (eg, candidates-L1L2-Id-r18) and/or a candidate cell index value parameter.
  • an L1/L2 candidate index value parameter eg, candidates-L1L2-Id-r18
  • a candidate cell index value parameter eg, candidates-L1L2-Id-r18
  • the candidate cell index parameter (e.g., CandidateCellIndex) has a value from 0 to (maxNrofCandidateCellsPerCellConfig-1), and optionally, the parameter maxNrofCandidateCellsPerCellConfig is the maximum number of candidate cells configured in the L1/L2 candidate information element to be added and modified, for example:
  • CandidateCellIndex:: INTEGER(0..maxNrofCandidateCellsPerCellConfig-1)
  • the candidate cell index parameter (e.g., CandidateCellIndex) ranges from 1 to maxNrofCandidateCellsPerCellConfig, for example:
  • CandidateCellIndex:: INTEGER(1..maxNrofCandidateCellsPerCellConfig)
  • a cell index value list parameter and a candidate cell index value list parameter are added to the cell group configuration information element: the correspondence between the candidate cell index value and the cell index value of the candidate cell is obtained through the cell index value list and the candidate cell index value list.
  • the cell group configuration information element may include special cells and secondary cells.
  • the cell group configuration information element includes one or more secondary cells. If a cell index value list parameter (e.g., cellIndexList) and a candidate cell index value list parameter (e.g., candidateCellIndexList) are added to the cell group configuration information element, the correspondence between the candidate cell index value and the cell index value of the candidate cell can be obtained through the candidate cell index value list and the cell index value list (e.g., cellIndexList), thereby obtaining the cell index value of the candidate cell according to the candidate cell index value of the candidate cell.
  • a cell index value list parameter e.g., cellIndexList
  • candidateCellIndexList e.g., candidateCellIndexList
  • each element in the cell index value list is a cell index value. If it is a special cell, the cell index value is a serving cell index value (e.g., servCellIndex) or a physical cell identifier (e.g., PCI) of the special cell; if it is a secondary cell, the cell index value is a secondary cell index value (e.g., sCellIndex) or a physical cell identifier (e.g., PCI) of the secondary cell.
  • Each element in the candidate cell index value list is a candidate cell index value corresponding to a candidate cell included in the cell group configuration information element, that is, each candidate cell is configured with a candidate cell index value, which is used to identify the candidate cell in L1/L2 information transmission.
  • At least one of the L1/L2 candidate index value parameter e.g., candidates-L1L2-Id-r18
  • candidate cell index value e.g., candidates-L1L2-Id-r18
  • candidate cell index value list e.g., candidate cell index value list
  • cell index value list e.g., candidate cell index value list
  • the two lists have the same number of elements, and the elements in the two lists have a one-to-one correspondence according to the order of the elements in the lists.
  • the correspondence between the candidate cell index value and the cell index value of the candidate cell is selected or determined based on the cell index value list and the candidate cell index value list. For example: the first candidate cell index value in the candidate cell index value list corresponds to the first cell index value in the cell index value list, the second candidate cell index value in the candidate cell index value list corresponds to the second cell index value in the cell index value list, and so on.
  • the candidate cell index value list and the first element of the cell index value list correspond to the cell, and the cell index value is obtained from the cell index value list according to the first candidate cell index value in the candidate cell index value list; if the cell group configuration information element contains multiple cells, the candidate cell index value list and the first element of the cell index value list correspond to a special cell, and the cell index value of the special cell (for example: servCellIndex or PCI) is obtained from the cell index value list according to the first candidate cell index value in the candidate cell index value list, and the candidate cell index value list and the second element of the cell index value list correspond to the secondary cell, and the cell index value of the secondary cell (for example: sCellIndex or PCI) is obtained according to a similar correspondence.
  • the cell index value of the secondary cell for example: sCellIndex or PCI
  • the candidate cell index parameter (e.g., CandidateCellIndex) has a value from 0 to (maxNrofCandidateCellsPerCellConfig-1), and optionally, the parameter maxNrofCandidateCellsPerCellConfig is the maximum number of candidate cells configured in the L1/L2 candidate information element to be added and modified, for example:
  • CandidateCellIndex:: INTEGER(0..maxNrofCandidateCellsPerCellConfig-1)
  • the candidate cell index parameter (e.g., CandidateCellIndex) ranges from 1 to maxNrofCandidateCellsPerCellConfig, for example:
  • CandidateCellIndex:: INTEGER(1..maxNrofCandidateCellsPerCellConfig)
  • the candidate cell index value number of the candidate cell configured in other L1/L2 candidate information elements to be added and modified is not affected, and the cell index value of the candidate cell is obtained by additionally configuring the correspondence between the cell index value list (for example: cellIndexList) and the candidate cell index value list (for example: candidateCellIndexList), and the changes to existing parameters are relatively small, such as: SpCellConfig and SCellConfig.
  • cellIndexList for example: cellIndexList
  • candidateCellIndexList for example: candidateCellIndexList
  • This embodiment adopts the above scheme, specifically by selecting or determining the candidate cell index value of the candidate cell from the special cell configuration information element and/or the auxiliary cell configuration information element based on the radio resource control signaling; selecting or determining the correspondence between the candidate cell index value and the cell index value of the candidate cell based on the cell index value list and the candidate cell index value list.
  • the candidate cell is identified by the L1/L2 candidate index value and/or the candidate cell index value, and the candidate cell index value is defined in all candidate cells configured by the L1/L2 candidate information element to be added and modified, so as to avoid being affected by the candidate cell index value number of the candidate cell configured in other L1/L2 candidate information elements to be added and modified; by adding the cell index value list parameter and the candidate cell index value list parameter in the cell group configuration information element, it is not affected by the candidate cell index value number of the candidate cell configured in other L1/L2 candidate information elements to be added and modified, and the cell index value of the candidate cell is obtained by additionally configuring the cell index value list and the correspondence between the candidate cell index value list, and the existing parameters are slightly changed.
  • FIG. 7 is a flow chart of a cell switching method according to a third embodiment, showing specific steps of transmitting a physical random access channel based on downlink control information, which may be at least one of the following:
  • S211 Perform physical random access channel transmission to the corresponding cell according to at least one of the value of the source cell determination field, the L1/L2 candidate index value and the candidate cell index value;
  • S212 Perform physical random access channel transmission to the corresponding cell according to the value of the source cell determination field, the L1/L2 candidate index value, the candidate cell index value, the candidate cell index value list and at least one item in the cell index value list.
  • downlink control information for example: DCI format 1_0
  • the downlink control information carries a physical downlink control channel command
  • a cell identifier is added to the downlink control information to distinguish that the physical downlink control channel command triggers the terminal device to perform a physical random access channel (PRACH, Physical Random Access Channel) transmission to the source cell or a candidate cell.
  • PRACH Physical Random Access Channel
  • the candidate cell index value identification is defined according to all candidate cells configured in the L1/L2 candidate list information element to be added and modified: only according to the candidate cell index value identification.
  • a source cell determination field is added to the downlink control information (e.g., DCI format 1_0), or a reserved bit in the downlink control information (e.g., DCI format 1_0) is used as the source cell determination field.
  • the bit width of the source cell determination field obtained by these two methods is 1 bit.
  • the source cell determination field is used to indicate whether the terminal device performs PRACH transmission to the source cell. If the value of this field is 1, it indicates that the physical downlink control channel command triggers the terminal device to perform PRACH transmission to the source cell, and/or, if the value of this field is 0, it indicates that the physical downlink control channel command triggers the terminal device to perform PRACH transmission to the candidate cell, and vice versa.
  • a candidate cell index value field is added to the downlink control information (e.g., DCI format 1_0), or a reserved bit in the downlink control information (e.g., DCI format 1_0) is used as the candidate cell index value field.
  • the candidate cell index value field is used to indicate a candidate cell index value parameter (e.g., candidateCellIndex) of a candidate cell.
  • the terminal device selects or determines a candidate cell from all candidate cells configured in the L1/L2 candidate list information element to be added and modified according to the value of the candidate cell index value field, that is, the value of the candidate cell index value field is the same as the value of the candidate cell index value parameter (e.g., candidateCellIndex) contained in the special cell configuration information element or the secondary cell configuration information element corresponding to the selected or determined candidate cell, and/or, the cell index value of the candidate cell is determined (e.g., the serving cell index value (e.g., servCellIndex) or the secondary cell index value (e.g., sCellIndex) or the physical cell identifier (e.g., PCI)), and the terminal device performs PRACH transmission to the candidate cell. If PRACH transmission is performed to the source cell, PRACH transmission is performed directly without considering the candidate cell index value.
  • the serving cell index value e.g., servCellIndex
  • the secondary cell index value e.g., sC
  • a candidate cell index value field is added to the downlink control information (e.g., DCI format 1_0), or a reserved bit in the downlink control information (e.g., DCI format 1_0) is used as a candidate cell index value field, and the candidate cell index value field is used to indicate a candidate cell index value parameter (e.g., candidateCellIndex) of a candidate cell.
  • DCI format 1_0 downlink control information
  • a reserved bit in the downlink control information e.g., DCI format 1_0
  • the candidate cell index value field is used to indicate a candidate cell index value parameter (e.g., candidateCellIndex) of a candidate cell.
  • the terminal device selects or determines a candidate cell from all candidate cells configured in the L1/L2 candidate list information element to be added and modified according to the value of the candidate cell index value field, that is, the value of the candidate cell index value field is the same as the value of the candidate cell index value parameter (e.g., candidateCellIndex) contained in the special cell configuration information element or the secondary cell configuration information element corresponding to the candidate cell, and the terminal device performs PRACH transmission to the candidate cell.
  • the candidate cell index value parameter e.g., candidateCellIndex
  • the value of the candidate cell index value field is 0, indicating that the physical downlink control channel command triggers the terminal device to perform PRACH transmission to the source cell.
  • the candidate cell index value identifier is defined according to all candidate cells configured in the L1/L2 candidate information element to be added and modified: according to the L1/L2 candidate index value and/or the candidate cell index value identifier.
  • a source cell determination field is added to the downlink control information (e.g., DCI format 1_0), or the reserved bits in the downlink control information (e.g., DCI format 1_0) are used as the source cell determination field.
  • the bit width of the source cell determination field obtained by these two methods is 1 bit, and the source cell determination field is used to indicate whether the terminal device performs PRACH transmission to the source cell. If the value of this field is 1, it indicates that the physical downlink control channel command triggers the terminal device to perform PRACH transmission to the source cell, and/or, if the value of this field is 0, it indicates that the physical downlink control channel command triggers the terminal device to perform PRACH transmission to the candidate cell, and vice versa.
  • the reserved bits in format 1_0 are used as the L1/L2 candidate index value field, which is used to indicate the L1/L2 candidate index value parameter (e.g., candidates-L1L2-Id-r18) of an L1/L2 candidate information element to be added and modified (e.g., Candidates-L1L2-ToAddMod-r18).
  • the terminal device selects or determines an L1/L2 candidate information element to be added and modified from the L1/L2 candidate list information element to be added and modified (for example, Candidates-L1L2-ToAddModList-r18) according to the value of the L1/L2 candidate index value field, that is, the value of the L1/L2 candidate index value field is the same as the value of the L1/L2 candidate index value parameter (for example, candidates-L1L2-Id-r18) of the selected or determined L1/L2 candidate information element to be added and modified, and obtains the corresponding cell group configuration information element according to the L1/L2 candidate information element to be added and modified.
  • an L1/L2 candidate information element to be added and modified from the L1/L2 candidate list information element to be added and modified (for example, Candidates-L1L2-ToAddModList-r18) according to the value of the L1/L2 candidate index value field, that is, the value of the L1/L2 candidate index value field is the same as the value of the L1/L2 candidate index value
  • a candidate cell index value field is added to the downlink control information (e.g., DCI format 1_0), or a reserved bit in the downlink control information (e.g., DCI format 1_0) is used as the candidate cell index value field, and the candidate cell index value field is used to indicate a candidate cell index value parameter (e.g., candidateCellIndex) of a candidate cell.
  • DCI format 1_0 Downlink Control information
  • DCI format 1_0 a reserved bit in the downlink control information
  • the candidate cell index value field is used to indicate a candidate cell index value parameter (e.g., candidateCellIndex) of a candidate cell.
  • the terminal device selects or determines a candidate cell from all candidate cells configured in the selected or determined L1/L2 candidate information element to be added and modified according to the value of the candidate cell index value field, that is, the value of the candidate cell index value field is the same as the value of the candidate cell index value parameter (e.g., candidateCellIndex) contained in the special cell configuration information element or the secondary cell configuration information element corresponding to the candidate cell, and/or, the cell index value of the candidate cell is determined (e.g., the serving cell index value (e.g., servCellIndex) or the secondary cell index value (e.g., sCellIndex) or the physical cell identifier (e.g., PCI)), and the terminal device performs PRACH transmission to the candidate cell. If PRACH transmission is performed to the source cell, PRACH transmission is performed directly without considering the L1/L2 candidate index value and the candidate cell index value.
  • the serving cell index value e.g., servCellIndex
  • the secondary cell index value
  • a candidate cell index value configuration determination parameter is added in the RRC signaling. If the candidate cell index value configuration determination parameter is configured to be enabled or has a value of 1, it indicates that a candidate cell index value field is added to the downlink control information (e.g., DCI format 1_0) or a reserved bit in the downlink control information (e.g., DCI format 1_0) is used as the candidate cell index value field; if the candidate cell index value configuration determination parameter is configured to be disabled or has a value of 0, it indicates that there is no need to add a candidate cell index value field to the downlink control information or there is no need to use the reserved bit in the downlink control information as the candidate cell index value field.
  • the candidate cell index value configuration determination parameter is configured to be enabled or has a value of 1, it indicates that a candidate cell index value field is added to the downlink control information (e.g., DCI format 1_0) or a reserved bit in the downlink control information (e.g., DCI format 1_0) is used as the candidate
  • a candidate cell index value field is added to the downlink control information (e.g., DCI format 1_0) or a reserved bit in the downlink control information (e.g., DCI format 1_0) is used as the candidate cell index value field; when carrier aggregation and/or dual link scenarios are not configured, there is no need to add a candidate cell index value field to the downlink control information or there is no need to use the reserved bit in the downlink control information as the candidate cell index value field.
  • the candidate cell index value field is used to indicate a candidate cell index value parameter (eg, candidateCellIndex) of a candidate cell.
  • a source cell determination field is added to the downlink control information (e.g., DCI format 1_0), or a reserved bit in the downlink control information (e.g., DCI format 1_0) is used as the source cell determination field.
  • the bit width of the source cell determination field obtained by these two methods is 1 bit.
  • the source cell determination field is used to indicate whether the terminal device performs PRACH transmission to the source cell. If the value of this field is 1, it indicates that the physical downlink control channel command triggers the terminal device to perform PRACH transmission to the source cell, and/or, if the value of this field is 0, it indicates that the physical downlink control channel command triggers the terminal device to perform PRACH transmission to the candidate cell, and vice versa.
  • An L1/L2 candidate index value field is added in the downlink control information (e.g., DCI format 1_0), or the reserved bits in the downlink control information (e.g., DCI format 1_0) are used as the L1/L2 candidate index value field, which is used to indicate an L1/L2 candidate index value parameter (e.g., candidates-L1L2-Id-r18) of an L1/L2 candidate information element to be added and modified.
  • an L1/L2 candidate index value parameter e.g., candidates-L1L2-Id-r18
  • the terminal device selects or determines an L1/L2 candidate information element to be added and modified from the L1/L2 candidate list information element to be added and modified according to the value of the L1/L2 candidate index value field, that is, the value of the L1/L2 candidate index value field is the same as the value of the L1/L2 candidate index value parameter (for example, candidates-L1L2-Id-r18) of the L1/L2 candidate information element to be added and modified, and obtains the corresponding cell group configuration information element according to the L1/L2 candidate information element to be added and modified.
  • the L1/L2 candidate index value field that is, the value of the L1/L2 candidate index value field is the same as the value of the L1/L2 candidate index value parameter (for example, candidates-L1L2-Id-r18) of the L1/L2 candidate information element to be added and modified
  • a candidate cell index value field is added to the downlink control information (e.g., DCI format 1_0) or the reserved bits in the downlink control information (e.g., DCI format 1_0) are used as the candidate cell index value field, and the candidate cell index value field is used to indicate the candidate cell index value parameter (e.g., candidateCellIndex) of a candidate cell.
  • the terminal device selects or determines a candidate cell from all candidate cells configured in the selected or determined L1/L2 candidate information element to be added and modified according to the value of the candidate cell index value field, that is, the value of the candidate cell index value field is the same as the value of the candidate cell index value parameter (e.g., candidateCellIndex) contained in the special cell configuration information element or the secondary cell configuration information element corresponding to the candidate cell, and/or, the cell index value of the candidate cell is determined (e.g., the serving cell index value (e.g., servCellIndex) or the secondary cell index value (e.g., sCellIndex) or the physical cell identifier (e.g., PCI)), and the terminal device performs PRACH transmission to the candidate cell. If PRACH transmission is performed to the source cell, PRACH transmission is performed directly without considering the L1/L2 candidate index value and the candidate cell index value.
  • the serving cell index value e.g., servCellIndex
  • the secondary cell index value
  • the terminal device obtains the cell group configuration information element corresponding to the L1/L2 candidate cell configuration parameter from the selected or determined L1/L2 candidate information element to be added and modified, and obtains the special cell configuration information element, thereby determining the candidate cell, that is, the special cell configured in the cell group configuration information element.
  • the terminal device determines the candidate cell according to the L1/L2 candidate index value field, and performs PRACH transmission to the candidate cell. If PRACH transmission is performed to the source cell, PRACH transmission is performed directly without considering the L1/L2 candidate index value.
  • an L1/L2 candidate index value field is added to the downlink control information (e.g., DCI format 1_0), or reserved bits in the downlink control information (e.g., DCI format 1_0) are used as the L1/L2 candidate index value field, and the L1/L2 candidate index value field is used to indicate an L1/L2 candidate index value parameter (e.g., candidates-L1L2-Id-r18) of an L1/L2 candidate information element to be added and modified.
  • an L1/L2 candidate index value parameter e.g., candidates-L1L2-Id-r18
  • the terminal device selects or determines an L1/L2 candidate information element to be added and modified from the L1/L2 candidate list information element to be added and modified according to the value of the L1/L2 candidate index value field, that is, the value of the L1/L2 candidate index value field and the L1/L2 candidate index value parameter (e.g., candidates-L1L2-Id-r18) of the L1/L2 candidate information element to be added and modified.
  • the value of is the same, and the corresponding cell group configuration information element is obtained according to the L1/L2 candidate information element to be added and modified.
  • a candidate cell index value field is added in the downlink control information (for example: DCI format 1_0), or the reserved bit in the downlink control information (for example: DCI format 1_0) is used as the candidate cell index value field, and the candidate cell index value field is used to indicate the candidate cell index value parameter (for example: candidateCellIndex) of a candidate cell.
  • the terminal device selects or determines a candidate cell from all candidate cells configured in the selected or determined L1/L2 candidate information element to be added and modified according to the value of the candidate cell index value field, that is: the value of the candidate cell index value field is the same as the value of the candidate cell index value parameter (for example: candidateCellIndex) contained in the special cell configuration information element or the secondary cell configuration information element corresponding to the candidate cell, and the terminal device performs PRACH transmission to the candidate cell.
  • the candidate cell index value field is the same as the value of the candidate cell index value parameter (for example: candidateCellIndex) contained in the special cell configuration information element or the secondary cell configuration information element corresponding to the candidate cell
  • the value of the L1/L2 candidate index value field is 0 and/or the value of the candidate cell index value field is 0, indicating that the physical downlink control channel command triggers the terminal device to perform PRACH transmission to the source cell.
  • the cell index value list parameter and candidate cell index value list parameter identifier added in the cell group configuration information element according to the L1/L2 candidate index value and/or candidate cell index value identifier.
  • a source cell determination field is added to the downlink control information (e.g., DCI format 1_0), or a reserved bit in the downlink control information (e.g., DCI format 1_0) is used as the source cell determination field.
  • the bit width of the source cell determination field obtained by these two methods is 1 bit, and the source cell determination field is used to indicate whether the terminal device performs PRACH transmission to the source cell. If the value of this field is 1, it indicates that the physical downlink control channel command triggers the terminal device to perform PRACH transmission to the source cell, and/or, if the value of this field is 0, it indicates that the physical downlink control channel command triggers the terminal device to perform PRACH transmission to the candidate cell, and vice versa.
  • An L1/L2 candidate index value field is added to the downlink control information (e.g., DCI format 1_0), or the reserved bits in the downlink control information (e.g., DCI format 1_0) are used as the L1/L2 candidate index value field, and the L1/L2 candidate index value field is used to indicate an L1/L2 candidate index value parameter (e.g., candidates-L1L2-Id-r18) of an L1/L2 candidate information element (e.g., Candidates-L1L2-ToAddMod-r18) to be added and modified.
  • an L1/L2 candidate index value parameter e.g., candidates-L1L2-Id-r18
  • an L1/L2 candidate information element e.g., Candidates-L1L2-ToAddMod-r18
  • the terminal device selects or determines an L1/L2 candidate information element to be added and modified from the L1/L2 candidate list information element to be added and modified (for example, Candidates-L1L2-ToAddModList-r18) according to the value of the L1/L2 candidate index value field, that is, the value of the L1/L2 candidate index value field is the same as the value of the L1/L2 candidate index value parameter (for example, candidates-L1L2-Id-r18) of the selected or determined L1/L2 candidate information element to be added and modified, and obtains the corresponding cell group configuration information element according to the L1/L2 candidate information element to be added and modified.
  • an L1/L2 candidate information element to be added and modified from the L1/L2 candidate list information element to be added and modified (for example, Candidates-L1L2-ToAddModList-r18) according to the value of the L1/L2 candidate index value field, that is, the value of the L1/L2 candidate index value field is the same as the value of the L1/L2 candidate index value
  • a candidate cell index value field is added to the downlink control information (e.g., DCI format 1_0), or a reserved bit in the downlink control information (e.g., DCI format 1_0) is used as a candidate cell index value field, and the candidate cell index value field is used to indicate a candidate cell index value of a candidate cell, that is, the candidate cell index value corresponds to a value of a candidate cell index value list (e.g., candidateCellIndexList).
  • the correspondence between the candidate cell index value and the cell index value of the candidate cell is selected or determined based on the cell index value list and the candidate cell index value list.
  • the cell index value of the candidate cell is obtained according to the value of the candidate cell index value field and the correspondence between the candidate cell index value and the cell index value of the candidate cell. If PRACH transmission is performed to the candidate cell, the terminal device performs PRACH transmission to the candidate cell according to the cell index value of the candidate cell. If PRACH transmission is performed to the source cell, PRACH transmission is performed directly without considering the L1/L2 candidate index value and the candidate cell index value.
  • an L1/L2 candidate index value field is added to the downlink control information (e.g., DCI format 1_0), or reserved bits in the downlink control information (e.g., DCI format 1_0) are used as the L1/L2 candidate index value field, and the L1/L2 candidate index value field is used to indicate an L1/L2 candidate index value parameter (e.g., candidates-L1L2-Id-r18) of an L1/L2 candidate information element to be added and modified.
  • an L1/L2 candidate index value parameter e.g., candidates-L1L2-Id-r18
  • the terminal device selects or determines an L1/L2 candidate information element to be added and modified from the L1/L2 candidate list information element to be added and modified according to the value of the L1/L2 candidate index value field, that is, the value of the L1/L2 candidate index value field is the same as the value of the L1/L2 candidate index value parameter (e.g., candidates-L1L2-Id-r18) of the selected or determined L1/L2 candidate information element to be added and modified, and obtains the corresponding cell group configuration information element according to the L1/L2 candidate information element to be added and modified.
  • the L1/L2 candidate index value field that is, the value of the L1/L2 candidate index value field is the same as the value of the L1/L2 candidate index value parameter (e.g., candidates-L1L2-Id-r18) of the selected or determined L1/L2 candidate information element to be added and modified
  • a candidate cell index value field is added to the downlink control information (e.g., DCI format 1_0), or the reserved bits in the downlink control information (e.g., DCI format 1_0) are used as the candidate cell index value field, and the candidate cell index value field is used to indicate the candidate cell index value of a candidate cell, that is, the candidate cell index value corresponds to a value of the candidate cell index value list (e.g., candidateCellIndexList).
  • the correspondence between the candidate cell index value and the cell index value of the candidate cell is selected or determined based on the cell index value list and the candidate cell index value list.
  • the cell index value of the candidate cell is obtained according to the value of the candidate cell index value field and the correspondence between the candidate cell index value and the cell index value of the candidate cell, and the terminal device performs PRACH transmission to the candidate cell.
  • the value of the L1/L2 candidate index value field is 0 and/or the value of the candidate cell index value field is 0, indicating that the physical downlink control channel command triggers the terminal device to perform PRACH transmission to the source cell.
  • the identification of the candidate cell in the cell switching command in the embodiment of the present application mainly includes defining the candidate cell index value identification in all candidate cells configured according to the L1/L2 candidate information element to be added and modified and/or according to the cell index value list parameters and candidate cell index value list parameter identification added in the cell group configuration information element.
  • an L1/L2 candidate index value field is added to the cell switching command, and the L1/L2 candidate index value field is used to indicate an L1/L2 candidate index value parameter (e.g., candidates-L1L2-Id-r18) of an L1/L2 candidate information element (e.g., Candidates-L1L2-ToAddMod-r18) to be added and modified.
  • an L1/L2 candidate index value parameter e.g., candidates-L1L2-Id-r18
  • an L1/L2 candidate information element e.g., Candidates-L1L2-ToAddMod-r18
  • the terminal device selects or determines an L1/L2 candidate information element to be added and modified from the L1/L2 candidate list information element to be added and modified (for example: Candidates-L1L2-ToAddModList-r18) according to the value of the L1/L2 candidate index value field, that is, the value of the L1/L2 candidate index value field is the same as the value of the L1/L2 candidate index value parameter (for example: candidates-L1L2-Id-r18) of the selected or determined L1/L2 candidate information element to be added and modified, and obtains the corresponding cell group configuration information element according to the L1/L2 candidate information element to be added and modified.
  • an L1/L2 candidate information element to be added and modified for example: Candidates-L1L2-ToAddModList-r18
  • a candidate cell index value field is added to the cell switching command, and the candidate cell index value field is used to indicate the candidate cell index value parameter (for example: candidateCellIndex) of a candidate cell.
  • the terminal device selects or determines an L1/L2 candidate information element to be added and modified from the selected or determined L1/L2 candidate list information element to be added and modified according to the value of the candidate cell index value field.
  • a candidate cell is selected or determined from all candidate cells configured in the candidate information element, that is, the value of the candidate cell index value field is the same as the value of the candidate cell index value parameter (e.g., candidateCellIndex) contained in the special cell configuration information element or the secondary cell configuration information element corresponding to the candidate cell, and/or, the cell index value of the candidate cell is determined (e.g., the serving cell index value (e.g., servCellIndex) or the secondary cell index value (e.g., sCellIndex) or the physical cell identifier (e.g., PCI)). Therefore, the terminal device obtains the candidate cell according to the L1/L2 candidate index value and/or the candidate cell index value, and the candidate cell is also called the target cell, and sends a cell switching confirmation message to the target cell.
  • the serving cell index value e.g., servCellIndex
  • the secondary cell index value e.g., sCellIndex
  • PCI physical cell identifier
  • an L1/L2 candidate index value field is added to the cell switching command, and the L1/L2 candidate index value field is used to indicate an L1/L2 candidate index value parameter (e.g., candidates-L1L2-Id-r18) of an L1/L2 candidate information element (e.g., Candidates-L1L2-ToAddMod-r18) to be added and modified.
  • an L1/L2 candidate index value parameter e.g., candidates-L1L2-Id-r18
  • an L1/L2 candidate information element e.g., Candidates-L1L2-ToAddMod-r18
  • the terminal device selects or determines an L1/L2 candidate information element to be added and modified from the L1/L2 candidate list information element to be added and modified (e.g., Candidates-L1L2-ToAddModList-r18) according to the value of the L1/L2 candidate index value field, that is, the value of the L1/L2 candidate index value field is the same as the value of the L1/L2 candidate index value parameter (e.g., candidates-L1L2-Id-r18) of the selected or determined L1/L2 candidate information element to be added and modified, and obtains the corresponding cell group configuration information element according to the L1/L2 candidate information element to be added and modified.
  • an L1/L2 candidate information element to be added and modified e.g., Candidates-L1L2-ToAddModList-r18
  • a candidate cell index value field is added to the cell switching command, and the candidate cell index value field is used to indicate the candidate cell index value of a candidate cell, that is, the candidate cell index value corresponds to a value of the candidate cell index value list (e.g., candidateCellIndexList).
  • the correspondence between the candidate cell index value and the cell index value of the candidate cell is selected or determined based on the cell index value list and the candidate cell index value list.
  • the cell index value of the candidate cell is obtained according to the value of the candidate cell index value field and the correspondence between the candidate cell index value and the cell index value of the candidate cell. Therefore, the terminal device obtains the candidate cell according to the L1/L2 candidate index value and/or the candidate cell index value and the cell index value list and the candidate cell index value list.
  • the candidate cell is also called the target cell, and a cell switching confirmation message is sent to the target cell.
  • This embodiment uses the above solution to perform physical random access channel transmission to the corresponding cell according to the value of the source cell determination field, the L1/L2 candidate index value, and at least one of the candidate cell index value; perform physical random access channel transmission to the corresponding cell according to the value of the source cell determination field, the L1/L2 candidate index value, the candidate cell index value, the candidate cell index value list, and at least one of the cell index value list.
  • the terminal device can identify the source cell or a candidate cell for PRACH transmission.
  • FIG. 8 is a flow chart of a cell switching method according to a fourth embodiment, showing that the specific steps of selecting or determining uplink resource indication information based on the random access response and/or the cell switching command may be at least one of the following:
  • S221 Select or determine uplink resource indication information according to the random access response and/or the cell switching command;
  • S222 Select or determine uplink resource indication information from the random access response and/or the cell switching command according to the value of the indication information field or parameter.
  • the terminal device triggers the terminal device to perform PRACH transmission to the target cell through the PDCCH order, and the target cell generates a random access response in response to the PRACH transmission.
  • the uplink resource indication information is selected or determined according to the random access response and/or the cell switching command; and/or, the uplink resource indication information is selected or determined from the random access response and/or the cell switching command according to the value of the indication information field or parameter.
  • the uplink authorization information is provided directly in the random access response: the target cell transmits the random access response to the source cell, the source cell directly transmits the random access response to the terminal device, and the terminal device uses the physical uplink shared channel to send a confirmation message to the target cell through the uplink resources indicated by the uplink authorization information.
  • the uplink authorization information includes at least one indication information such as physical uplink shared channel frequency domain resource allocation, frequency domain frequency hopping flag, physical uplink shared channel time domain resource allocation, physical uplink shared channel transmit power command (TPC, Transmit Power Command), modulation and coding scheme (MCS, Modulation and Coding Scheme) and channel status information request.
  • the cell switching command is provided: the target cell transmits the random access response to the source cell, the source cell transmits the uplink authorization information in the random access response to the terminal device through the cell switching command, and the terminal device uses the physical uplink shared channel to send a confirmation message to the target cell through the uplink resources indicated by the cell switching command, and/or the cell switching command may also include a transmission configuration indication (TCI, Transmission Configuration Indication) state.
  • TCI Transmission Configuration Indication
  • the cell switching command includes at least one of the following uplink resources: physical uplink shared channel frequency domain resource allocation, frequency domain frequency hopping flag, physical uplink shared channel time domain resource allocation, physical uplink shared channel transmission power command, modulation and coding mode, channel state information request and transmission configuration indication state.
  • the number of bits of the above resources are 14 bits, 1 bit, 4 bits, 3 bits, 4 bits, 1 bit and 7 bits respectively.
  • the transmission configuration indication state type is a downlink/uplink joint TCI mode, that is, the RRC parameter unifiedTCI-StateType is configured as joint.
  • the terminal device may be instructed by the network device.
  • the uplink resource for transmitting the confirmation message is obtained by at least one of the following methods:
  • a physical downlink control channel command e.g., DCI 1_0
  • RRC parameter indication for example, adding an indication information field in the downlink control information (e.g., DCI format 1_0), or using reserved bits in the downlink control information (e.g., DCI format 1_0) as the indication information field, optionally, the bit width of the indication information field obtained by these two methods is 1 bit, and the indication information field is used to indicate to the terminal device that the uplink resources for transmitting the confirmation message are provided through the uplink authorization information in the random access response or the cell switching command.
  • an indication information field in the downlink control information e.g., DCI format 1_0
  • reserved bits in the downlink control information e.g., DCI format 1_0
  • the bit width of the indication information field obtained by these two methods is 1 bit, and the indication information field is used to indicate to the terminal device that the uplink resources for transmitting the confirmation message are provided through the uplink authorization information in the random access response or the cell switching command.
  • the terminal device obtains the uplink authorization information from the random access response and/or the cell switching command according to the value of the indication information field. Or select or determine the uplink resource indication information in the cell switching command for transmitting the confirmation message.
  • an indication information parameter is added in the RRC. If the parameter is enabled or takes a value of 1, it indicates that the uplink authorization information in the random access response is provided, and/or, if the parameter is not enabled or takes a value of 0, it indicates that the uplink resource indication information is provided through the cell switching command, and vice versa.
  • the terminal device selects or determines the uplink resource indication information from the random access response and/or the cell switching command for transmitting the confirmation message according to the value of the indication information parameter.
  • This embodiment adopts the above scheme, specifically by selecting or determining the uplink resource indication information according to the random access response and/or the cell switching command; selecting or determining the uplink resource indication information from the random access response and/or the cell switching command according to the value of the indication information field or parameter.
  • the terminal device uses the physical uplink shared channel to send a confirmation message to the target cell using the uplink resources obtained by the above two methods, and the identifier of the target cell can be the same as the target cell indicated by the PDCCH order and/or the cell switching command.
  • FIG. 9 is a flow chart of a cell switching method according to the fifth embodiment, showing that the specific steps of selecting or determining a target cell according to downlink control information and/or a cell switching command may be at least one of the following:
  • S231 Obtain a target cell according to the L1/L2 candidate index value, the candidate cell index value in the downlink control information, and at least one of the candidate cell index value list and the cell index value list in the cell group configuration information element;
  • S232 Obtain the target cell according to the L1/L2 candidate index value, the candidate cell index value in the cell switching command, and at least one item in the candidate cell index value list and the cell index value list in the cell group configuration information element.
  • the target cell to which the terminal device sends a confirmation message is determined based on the L1/L2 candidate index value in the downlink control information and/or the cell switching command, the candidate cell index value, the candidate cell index value list in the cell group configuration information element, and at least one item in the cell index value list.
  • a candidate cell index value identifier is defined according to all candidate cells configured in the L1/L2 candidate list information element to be added and modified, including: selecting or determining a candidate cell from all candidate cells configured in the L1/L2 candidate list information element to be added and modified according to the value of the candidate cell index value field in the PDCCH order and/or the cell switching command, that is, the value of the candidate cell index value field is the same as the value of the candidate cell index value parameter (for example: candidateCellIndex) contained in the special cell configuration information element or the secondary cell configuration information element corresponding to the candidate cell, and the candidate cell is also called the target cell, and/or, determining the cell index value of the target cell (for example: serving cell index value (for example: servCellIndex) or secondary cell index value (for example: sCellIndex) or physical cell identifier (for example: PCI)), and the terminal device sends a confirmation message to the target cell according to the uplink resources.
  • serving cell index value for example: servCellInde
  • a candidate cell index value identifier is defined according to all candidate cells configured in the L1/L2 candidate information element to be added and modified, including: selecting or determining an L1/L2 candidate information element to be added and modified from the L1/L2 candidate list information element to be added and modified according to the value of the L1/L2 candidate index value field in the PDCCH order and/or the cell switching command, that is, the value of the L1/L2 candidate index value field is the same as the value of the L1/L2 candidate index value parameter (for example: candidates-L1L2-Id-r18) of the L1/L2 candidate information element to be added and modified, and obtaining the corresponding cell group configuration information element according to the L1/L2 candidate information element to be added and modified.
  • the L1/L2 candidate index value parameter for example: candidates-L1L2-Id-r18
  • a candidate cell is selected or determined from all the candidate cells configured in the selected or determined L1/L2 candidate information element to be added and modified, that is, the value of the candidate cell index value field is the same as the value of the candidate cell index value parameter (for example: candidateCellIndex) contained in the special cell configuration information element or the secondary cell configuration information element corresponding to the candidate cell, and the candidate cell is also called the target cell, and/or, the cell index value of the target cell is determined (for example: the serving cell index value (for example: servCellIndex) or the secondary cell index value (for example: sCellIndex) or the physical cell identifier (for example: PCI)), and the terminal device sends a confirmation message to the target cell according to the uplink resources.
  • the serving cell index value for example: servCellIndex
  • secondary cell index value for example: sCellIndex
  • PCI physical cell identifier
  • the cell index value list parameter and the candidate cell index value list parameter identifier added in the cell group configuration information element including: selecting or determining an L1/L2 candidate information element to be added and modified from the L1/L2 candidate list information element to be added and modified according to the value of the L1/L2 candidate index value field in the PDCCH order and/or the cell switching command, that is, the value of the L1/L2 candidate index value field is the same as the value of the L1/L2 candidate index value parameter (for example: candidates-L1L2-Id-r18) of the selected or determined L1/L2 candidate information element to be added and modified, and obtaining the corresponding cell group configuration information element according to the L1/L2 candidate information element to be added and modified.
  • the L1/L2 candidate index value field for example: candidates-L1L2-Id-r18
  • the correspondence between the candidate cell index value and the cell index value of the candidate cell is selected or determined, and the cell index value of the candidate cell (for example: serving cell index value (for example: servCellIndex) or secondary cell index value (for example: sCellIndex) or physical cell identifier (for example: PCI)) is obtained according to the value of the candidate cell index value field in the PDCCH order and/or the cell switching command and the correspondence between the candidate cell index value and the cell index value of the candidate cell.
  • the candidate cell is also called the target cell, and a confirmation message is sent to the target cell based on the uplink resources.
  • This embodiment uses the above scheme to obtain the target cell according to the L1/L2 candidate index value, the candidate cell index value in the downlink control information, and at least one of the candidate cell index value list and the cell index value list in the cell group configuration information element; obtain the target cell according to the L1/L2 candidate index value, the candidate cell index value in the cell handover command, and at least one of the candidate cell index value list and the cell index value list in the cell group configuration information element.
  • this embodiment further discloses the cell switching method in the above embodiments.
  • the confirmation message is a media access control layer control unit (MAC CE, Media Access Control Element) transmitted through a physical uplink shared channel, and optionally includes a cell radio network temporary identifier (C-RNTI, Cell Radio Network Temporary Identifier) and a target cell identifier.
  • MAC CE media access control layer control unit
  • C-RNTI Cell Radio Network Temporary Identifier
  • the confirmation message includes an L1/L2 candidate index value and/or a candidate cell index value.
  • a candidate cell index value identifier is defined in all candidate cells configured in the L1/L2 candidate list information element to be added and modified, including: adding a candidate cell index value field in the MAC CE, and the candidate cell index value field is used to indicate a candidate cell index value parameter (for example: candidateCellIndex) of a candidate cell.
  • the terminal device selects or determines a candidate cell from all candidate cells configured in the L1/L2 candidate list information element to be added and modified according to the value of the candidate cell index value field, that is, the value of the candidate cell index value field is the same as the value of the candidate cell index value parameter (for example, candidateCellIndex) contained in the special cell configuration information element or the secondary cell configuration information element corresponding to the candidate cell.
  • the candidate cell is also called the target cell.
  • the network device can obtain the cell index value of the target cell (for example, the serving cell index value (for example, servCellIndex) or the secondary cell index value (for example, sCellIndex) or the physical cell identifier (for example, PCI)) according to the candidate cell index value, and obtain the target cell to which the terminal device sends a confirmation message, that is, the target cell for cell switching.
  • the serving cell index value for example, servCellIndex
  • secondary cell index value for example, sCellIndex
  • PCI physical cell identifier
  • the candidate cell index value identifier is defined in all candidate cells configured in the L1/L2 candidate information element to be added and modified, including: adding an L1/L2 candidate index value field in the MAC CE, the L1/L2 candidate index value field is used to indicate an L1/L2 candidate index value parameter (for example: candidates-L1L2-Id-r18) of an L1/L2 candidate information element to be added and modified.
  • the network device selects or determines an L1/L2 candidate information element to be added and modified from the L1/L2 candidate list information element to be added and modified according to the value of the L1/L2 candidate index value field, that is, the value of the L1/L2 candidate index value field is the same as the value of the L1/L2 candidate index value parameter (for example: candidates-L1L2-Id-r18) of the L1/L2 candidate information element to be added and modified, and obtains the corresponding cell group configuration information element according to the L1/L2 candidate information element to be added and modified.
  • the L1/L2 candidate index value field is the same as the value of the L1/L2 candidate index value parameter (for example: candidates-L1L2-Id-r18) of the L1/L2 candidate information element to be added and modified
  • a candidate cell index value field is added in the MAC CE, and the candidate cell index value field is used to indicate the candidate cell index value parameter (e.g., candidateCellIndex) of a candidate cell.
  • the network device selects or determines a candidate cell from all candidate cells configured in the selected or determined L1/L2 candidate information element to be added and modified according to the value of the candidate cell index value field, that is, the value of the candidate cell index value field is the same as the value of the candidate cell index value parameter (e.g., candidateCellIndex) contained in the special cell configuration information element or the secondary cell configuration information element corresponding to the candidate cell.
  • the candidate cell is also called the target cell.
  • the network device can obtain the cell index value of the target cell (e.g., serving cell index value (e.g., servCellIndex) or secondary cell index value (e.g., sCellIndex) or physical cell identifier (e.g., PCI)) according to the candidate cell index value, and obtain the target cell to which the terminal device sends a confirmation message, that is, the target cell for cell switching.
  • serving cell index value e.g., servCellIndex
  • secondary cell index value e.g., sCellIndex
  • PCI physical cell identifier
  • the cell index value list parameter and candidate cell index value list parameter identifier added in the cell group configuration information element includes: adding an L1/L2 candidate index value field in the MAC CE, the L1/L2 candidate index value field is used to indicate the L1/L2 candidate index value parameter (for example: candidates-L1L2-Id-r18) of an L1/L2 candidate information element to be added and modified.
  • the network device selects or determines an L1/L2 candidate information element to be added and modified from the L1/L2 candidate list information element to be added and modified according to the value of the L1/L2 candidate index value field, that is, the value of the L1/L2 candidate index value field is the same as the value of the L1/L2 candidate index value parameter (for example: candidates-L1L2-Id-r18) of the selected or determined L1/L2 candidate information element to be added and modified, and obtains the corresponding cell group configuration information element according to the L1/L2 candidate information element to be added and modified.
  • the L1/L2 candidate index value field that is, the value of the L1/L2 candidate index value field is the same as the value of the L1/L2 candidate index value parameter (for example: candidates-L1L2-Id-r18) of the selected or determined L1/L2 candidate information element to be added and modified
  • a candidate cell index value field is added in the MAC CE, and the candidate cell index value field is used to indicate the candidate cell index value of a candidate cell, that is, the candidate cell index value corresponds to a value of the candidate cell index value list (e.g., candidateCellIndexList).
  • the candidate cell index value field is used to indicate the candidate cell index value of a candidate cell, that is, the candidate cell index value corresponds to a value of the candidate cell index value list (e.g., candidateCellIndexList).
  • the correspondence between the candidate cell index value and the cell index value of the candidate cell is selected or determined based on the cell index value list and the candidate cell index value list.
  • the cell index value of the candidate cell e.g., serving cell index value (e.g., servCellIndex) or secondary cell index value (e.g., sCellIndex) or physical cell identifier (e.g., PCI)
  • serving cell index value e.g., servCellIndex
  • secondary cell index value e.g., sCellIndex
  • physical cell identifier e.g., PCI
  • This embodiment adopts the above solution, specifically by adding a field in the confirmation message to represent an L1/L2 candidate index value and/or a candidate cell index value, so that the network device can obtain the target cell for the terminal device to perform cell switching from the confirmation message.
  • FIG. 10 is a schematic flow chart of a cell switching method according to a seventh embodiment.
  • the cell switching method can be applied to a network device (eg, a base station), and includes the following steps:
  • S1 Send downlink information so that the terminal device can switch cells based on the downlink information.
  • the downlink information includes at least one of the following: radio resource control signaling, downlink control information, a random access response and/or a cell switching command.
  • the radio resource control signaling includes candidate cell configuration and/or indication information parameters.
  • the candidate cell configuration includes at least one of a candidate cell index value, an L1/L2 candidate index value, a candidate cell index value list and a cell index value list.
  • the network device is further configured to receive a physical random access channel and/or a confirmation message.
  • At least one of the following items is also included: adding candidate cell index value parameters in special cell configuration information elements and/or secondary cell configuration information elements, configuring cell index value list parameters and/or candidate cell index value list parameters in cell group configuration information elements, and adding indication information parameters in wireless resource control signaling.
  • the method before the step of sending downlink control information, the method further includes: adding at least one of a source cell determination field, an indication information field, an L1/L2 candidate index value field, and a candidate cell index value field to the downlink control information.
  • a candidate cell index value parameter is added to the sent wireless resource control signaling, including defining the candidate cell index value in all candidate cells configured by the L1/L2 candidate list information element to be added and modified, defining the candidate cell index value in all candidate cells configured by the L1/L2 candidate information element to be added and modified, and/or adding at least one of the cell index value list parameter and the candidate cell index value list parameter in the cell group configuration information element.
  • a candidate cell index value parameter (e.g., candidateCellIndex) is used to identify the special cell in layer 1/layer 2 (e.g., L1/L2) information transmission, and/or, if the cell group configuration information element (e.g., CellGroupConfig) is configured with a secondary cell configuration (e.g., SCellConfig) information element, a candidate cell index value parameter (e.g., candidateCellIndex) is added to the secondary cell configuration information element to identify the secondary cell in L1/L2 information transmission.
  • cell group configuration information element e.g., CellGroupConfig
  • SCellConfig secondary cell configuration
  • a candidate cell index value is defined in all candidate cells configured by the L1/L2 candidate list information element to be added and modified, indicating that the candidate cell index value parameter (e.g., candidateCellIndex) is uniformly numbered in all candidate cells configured by the L1/L2 candidate list information element to be added and modified.
  • All candidate cells configured by the L1/L2 candidate list information element to be added and modified refer to candidate cells configured by all L1/L2 candidate information elements to be added and modified configured by the L1/L2 candidate list information element to be added and modified, that is, candidate cells configured by the cell group configuration information element corresponding to the L1/L2 candidate cell configuration parameters contained in all L1/L2 candidate information elements to be added and modified.
  • the parameter maxNrofCandidateCells is the maximum number of candidate cells configured by the L1/L2 candidate list information element to be added and modified.
  • a candidate cell index value parameter (e.g., candidateCellIndex) is added to the special cell configuration information element to identify the special cell in L1/L2 information transmission, and/or, if the cell group configuration information element is configured with a secondary cell configuration information element, a candidate cell index value parameter is added to the secondary cell configuration information element to identify the secondary cell in L1/L2 information transmission.
  • a candidate cell index value is defined in all candidate cells configured by the L1/L2 candidate information element to be added and modified, indicating that the candidate cell index value parameter (e.g., candidateCellIndex) is numbered in all candidate cells configured by the current L1/L2 candidate information element to be added and modified.
  • All candidate cells configured by the L1/L2 candidate information element to be added and modified refer to all candidate cells configured by the cell group configuration information element corresponding to the L1/L2 candidate cell configuration parameter contained in the L1/L2 candidate information element to be added and modified.
  • a candidate cell configured in the L1/L2 candidate information element to be added and modified can be uniquely identified by using an L1/L2 candidate index value parameter (eg, candidates-L1L2-Id-r18) and/or a candidate cell index value parameter.
  • an L1/L2 candidate index value parameter eg, candidates-L1L2-Id-r18
  • a candidate cell index value parameter eg, candidates-L1L2-Id-r18
  • the candidate cell index value parameter (eg, CandidateCellIndex) takes a value from 0 to (maxNrofCandidateCellsPerCellConfig-1), and optionally, the parameter maxNrofCandidateCellsPerCellConfig is the maximum number of candidate cells configured in the L1/L2 candidate information element to be added and modified.
  • the candidate cell index parameter (eg, CandidateCellIndex) has a value ranging from 1 to maxNrofCandidateCellsPerCellConfig.
  • the cell group configuration information element may include special cells and secondary cells.
  • the cell group configuration information element includes one or more secondary cells. If a cell index value list parameter (e.g., cellIndexList) and a candidate cell index value list parameter (e.g., candidateCellIndexList) are added to the cell group configuration information element, the correspondence between the candidate cell index value and the cell index value of the candidate cell can be obtained through the candidate cell index value list and the cell index value list (e.g., cellIndexList), thereby obtaining the cell index value of the candidate cell according to the candidate cell index value of the candidate cell.
  • a cell index value list parameter e.g., cellIndexList
  • candidateCellIndexList e.g., candidateCellIndexList
  • each element in the cell index value list is a cell index value. If it is a special cell, the cell index value is a serving cell index value (e.g., servCellIndex) or a physical cell identifier (e.g., PCI) of the special cell; if it is a secondary cell, the cell index value is a secondary cell index value (e.g., sCellIndex) or a physical cell identifier (e.g., PCI) of the secondary cell.
  • Each element in the candidate cell index value list is a candidate cell index value corresponding to a candidate cell included in the cell group configuration information element, that is, each candidate cell is configured with a candidate cell index value, which is used to identify the candidate cell in L1/L2 information transmission.
  • At least one of the L1/L2 candidate index value parameter e.g., candidates-L1L2-Id-r18
  • candidate cell index value e.g., candidates-L1L2-Id-r18
  • candidate cell index value list e.g., candidate cell index value list
  • cell index value list e.g., candidate cell index value list
  • the two lists have the same number of elements, and the elements in the two lists have a one-to-one correspondence according to the order of the elements in the lists.
  • the correspondence between the candidate cell index value and the cell index value of the candidate cell is selected or determined based on the cell index value list and the candidate cell index value list. For example: the first candidate cell index value in the candidate cell index value list corresponds to the first cell index value in the cell index value list, the second candidate cell index value in the candidate cell index value list corresponds to the second cell index value in the cell index value list, and so on.
  • the candidate cell index value list and the first element of the cell index value list correspond to the cell, and the cell index value is obtained from the cell index value list according to the first candidate cell index value in the candidate cell index value list; if the cell group configuration information element contains multiple cells, the candidate cell index value list and the first element of the cell index value list correspond to a special cell, and the cell index value of the special cell (for example: servCellIndex or PCI) is obtained from the cell index value list according to the first candidate cell index value in the candidate cell index value list, and the candidate cell index value list and the cell index value list correspond to the secondary cell starting from the second element, and the cell index value of the secondary cell (for example: sCellIndex or PCI) is obtained according to a similar correspondence.
  • the cell index value of the secondary cell for example: sCellIndex or PCI
  • This embodiment uses the above scheme, specifically by sending downlink information so that the terminal performs cell switching based on the downlink information, adding candidate cell index value parameters, configuration cell index value list parameters and/or candidate cell index value list parameters in the special cell configuration information element and/or the secondary cell configuration information element, and adding indication information parameters in the wireless resource control signaling; adding at least one of the source cell determination field, indication information field, L1/L2 candidate index value field, and candidate cell index value field in the downlink control information, and adding a candidate cell identifier in the wireless resource control signaling, downlink control information, random access response and/or cell switching command for L1 and/or L2 signaling transmission, so that the terminal device can identify the candidate cell for cell switching.
  • FIG 11 is a schematic flow chart of a cell switching method according to an eighth embodiment. Based on the above embodiments of the present application, this embodiment further discloses the cell switching method in the above embodiments.
  • a network device eg, a base station
  • a terminal device eg, a mobile phone
  • the terminal device eg, a mobile phone
  • the downlink information sent by the network device includes radio resource control signaling, downlink control information, random access At least one of a response and/or a cell handover command.
  • the radio resource control signaling includes candidate cell configuration and/or indication information parameters
  • the candidate cell configuration includes at least one of a candidate cell index value, an L1/L2 candidate index value, a candidate cell index value list and a cell index value list.
  • the source cell sends a candidate cell configuration message and/or a PDCCH order to the terminal device, triggering the terminal device to perform a PRACH transmission to the target cell, and the target cell generates a random access response in response to the PRACH transmission.
  • the target cell transmits the random access response to the source cell
  • the source cell directly transmits the random access response to the terminal device
  • the terminal device uses the physical uplink shared channel to send a confirmation message to the target cell through the uplink resources indicated by the uplink authorization information.
  • the uplink authorization information includes at least one indication information such as physical uplink shared channel frequency domain resource allocation, frequency domain frequency hopping flag, physical uplink shared channel time domain resource allocation, physical uplink shared channel channel transmit power command, modulation and coding mode and channel state information request.
  • FIG. 12 is another flow chart of the cell switching method according to the eighth embodiment.
  • the target cell transmits the random access response to the source cell
  • the source cell transmits the uplink authorization information in the random access response to the terminal device through the cell switching command
  • the terminal device sends a confirmation message to the target cell using the physical uplink shared channel through the uplink resource indicated by the cell switching command, and/or the cell switching command may also include a transmission configuration indication (TCI, Transmission Configuration Indication) state.
  • TCI Transmission Configuration Indication
  • the cell switching command includes at least one of the following uplink resources: physical uplink shared channel frequency domain resource allocation, frequency domain frequency modulation flag, physical uplink shared channel time domain resource allocation, physical uplink shared channel transmission power command, modulation and coding mode, channel state information request and transmission configuration indication state.
  • the number of bits of the above resources is 14 bits, 1 bit, 4 bits, 3 bits, 4 bits, 1 bit and 7 bits respectively.
  • the transmission configuration indication state type is a downlink/uplink joint TCI mode, that is, the RRC parameter unifiedTCI-StateType is configured as joint.
  • the terminal device uses the physical uplink shared channel to send a confirmation message to the target cell using the uplink resources obtained through the above two methods.
  • the identifier of the target cell may be the same as the candidate cell indicated by the PDCCH order and/or the cell switching command.
  • the network device may instruct the terminal device that the uplink resources for transmitting the confirmation message may be obtained in at least one of the following ways: (1) directly provided through uplink authorization information in the random access response, (2) provided through a cell switching command.
  • a physical downlink control channel command e.g., DCI 1_0
  • RRC parameter indication for example, adding an indication information field in the downlink control information (e.g., DCI format 1_0), or using reserved bits in the downlink control information (e.g., DCI format 1_0) as the indication information field, optionally, the bit width of the indication information field obtained by these two methods is 1 bit, and the indication information field is used to indicate to the terminal device that the uplink resources for transmitting the confirmation message are provided through the uplink authorization information in the random access response or the cell switching command.
  • an indication information field in the downlink control information e.g., DCI format 1_0
  • reserved bits in the downlink control information e.g., DCI format 1_0
  • the bit width of the indication information field obtained by these two methods is 1 bit, and the indication information field is used to indicate to the terminal device that the uplink resources for transmitting the confirmation message are provided through the uplink authorization information in the random access response or the cell switching command.
  • the terminal device selects or determines the uplink resource indication information from the random access response and/or the cell switching command for transmitting the confirmation message according to the value of the indication information field.
  • an indication information parameter is added in the RRC. If the parameter is enabled or takes a value of 1, it indicates that the uplink authorization information in the random access response is provided, and/or, if the parameter is not enabled or takes a value of 0, it indicates that the uplink resource indication information is provided through the cell switching command, and vice versa.
  • the terminal device selects or determines the uplink resource indication information from the random access response and/or the cell switching command for transmitting the confirmation message according to the value of the indication information parameter.
  • This embodiment uses the above scheme, specifically through the network device to send downlink information to the terminal device, so that the terminal device performs cell switching based on the downlink information, and adds a candidate cell identifier in the wireless resource control signaling, downlink control information, random access response and/or cell switching command for L1 and/or L2 signaling transmission, so that the terminal device can identify the target cell for cell switching, determine or generate a confirmation message, and the network device obtains the target cell for cell switching of the terminal device from the confirmation message.
  • Figure 13 is a schematic diagram of the structure of a cell switching device provided in an embodiment of the present application.
  • the device can be mounted on or is a communication device, and the communication device can specifically be a terminal device or a network device.
  • the cell switching device shown in Figure 13 can be used to perform some or all of the functions of the method embodiment described in the above embodiment.
  • the cell switching device 110 includes:
  • the switching module 111 is configured to perform cell switching based on at least one of radio resource control signaling, downlink control information, random access response and cell switching command.
  • the device further comprises at least one of the following:
  • the radio resource control signaling includes candidate cell configuration and/or indication information parameters
  • the downlink control information includes at least one of a source cell determination field, an indication information field, a layer 1/layer 2 candidate index value, and a candidate cell index value.
  • the candidate cell configuration includes at least one of a candidate cell index value, a layer 1/layer 2 candidate index value, a candidate cell index value list, and a cell index value list.
  • the device further comprises at least one of the following:
  • the apparatus further comprises at least one of the following: selecting or determining a candidate cell index value of a candidate cell from a special cell configuration information element and/or a secondary cell configuration information element based on radio resource control signaling;
  • a correspondence between a candidate cell index value and a cell index value of a candidate cell is selected or determined based on the cell index value list and the candidate cell index value list.
  • the transmitting a physical random access channel based on downlink control information includes at least one of the following:
  • a physical random access channel is transmitted to the corresponding cell.
  • the device further comprises at least one of the following:
  • the uplink resource indication information is selected or determined from the random access response and/or the cell switching command according to the value of the indication information field or parameter.
  • the device further comprises at least one of the following:
  • the target cell is obtained according to the layer 1/layer 2 candidate index value, the candidate cell index value in the cell switching command, and at least one item in the candidate cell index value list and the cell index value list in the cell group configuration information element.
  • the confirmation message includes layer 1/layer 2 candidate index values and/or candidate cell index values.
  • the cell 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.
  • FIG. 14 is a second structural diagram of a cell switching device provided in an embodiment of the present application.
  • the cell switching device 120 includes:
  • the sending module 121 is used to send downlink information so that the terminal performs cell switching based on the downlink information.
  • the method further includes at least one of the following: the downlink information includes at least one of the following: radio resource control signaling, downlink control information, random access response and/or cell switching command;
  • the device further comprises at least one of the following:
  • At least one of the following is also included: adding a candidate cell index value parameter in a special cell configuration information element and/or a secondary cell configuration information element, configuring a cell index value list parameter and/or a candidate cell index value list parameter in a cell group configuration information element, and adding an indication information parameter in the radio resource control signaling;
  • the device also includes: before the step of sending downlink control information, it also includes: adding at least one of the source cell determination field, indication information field, layer 1/layer 2 candidate index value field, and candidate cell index value field in the downlink control information.
  • the cell 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 140 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 140 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 140 may include one or more processors 141, which may also be referred to as a processing unit, and may implement certain control or processing functions.
  • the processor 141 may be a general-purpose processor or a dedicated processor, etc. For example, it may be a baseband processor or a central processing unit.
  • the baseband processor may be used to process the communication protocol and communication data
  • the central processing unit may be used to control the communication device, execute the software program, and process the data of the software program.
  • the processor 141 may also store instructions 143 or data (eg, intermediate data).
  • the instructions 143 may be executed by the processor 141, so that the communication device 140 executes the method corresponding to the terminal device or network device described in the above method embodiment.
  • the communication device 140 may include a circuit, which can implement the functions of sending or receiving or communicating in the aforementioned method embodiments.
  • the communication device 140 may include one or more memories 142, on which instructions 144 may be stored. The instructions may be executed on the processor 141, so that the communication device 140 executes the method described in the above method embodiment.
  • data may also be stored in the memory 142.
  • the processor 141 and the memory 142 may be provided separately or integrated together.
  • the communication device 140 may further include a transceiver 145 and/or an antenna 146.
  • the processor 141 may be referred to as a processing unit, and controls the communication device 140 (terminal device or core network device or wireless access network device).
  • the transceiver 145 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 140.
  • the transceiver 145 can receive downlink information; and the processor 141 can perform cell switching based on the downlink information.
  • the specific implementation process of the processor 141 and the transceiver 145 can refer to the relevant description of the above embodiments, which will not be repeated here.
  • the transceiver 145 may send downlink information so that the terminal performs cell switching based on the downlink information.
  • the specific implementation process of the processor 141 and the transceiver 145 can refer to the relevant description of the above embodiments, which will not be repeated here.
  • the processor 141 and the transceiver 145 described in the present application can be implemented in an IC (Integrated Circuit), an analog integrated circuit, Circuit, RFIC (Radio Frequency Integrated Circuit), mixed signal integrated circuit, ASIC (Application Specific Integrated Circuit), PCB (Printed Circuit Board), electronic equipment, etc.
  • IC Integrated Circuit
  • RFIC Radio Frequency Integrated Circuit
  • ASIC Application Specific Integrated Circuit
  • PCB Print Circuit Board
  • the processor 141 and the transceiver 145 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 15.
  • 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.
  • the embodiment of the present application also provides a communication device, including a memory and a processor, wherein a cell switching program is stored in the memory, and when the cell switching program is executed by the processor, the steps of the cell switching method in any of the above embodiments are implemented.
  • the communication device in the present application can be a terminal device (such as a mobile phone) or a network device (such as a base station), and the specific reference needs to be clarified according to the context.
  • An embodiment of the present application further provides a storage medium, on which a cell switching program is stored.
  • the cell switching program is executed by a processor, the steps of the cell switching method in any of the above embodiments are implemented.
  • An embodiment of the present application further provides 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, wherein 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无线资源控制信令、下行控制信息、随机接入响应及小区切换命令中的至少一项进行小区切换，在无线资源控制信令、下行控制信息、随机接入响应和/或小区切换命令中增加候选小区标识，用于L1和/或L2信令传输，使终端设备能识别出进行小区切换的候选小区。

Description

小区切换方法、通信设备及存储介质 技术领域
本申请涉及通信技术领域，尤其涉及一种小区切换方法、通信设备及存储介质。
背景技术
现有协议中，通过Xn接口信息交互以及RRC(Radio Resource Control，无线资源控制)信令完成小区切换，在移动性场景中，如果通过源小区发送PDCCH(Physical Downlink Control Channel，物理下行控制信道)命令触发终端设备向候选小区进行随机接入以及对应的小区切换过程，可以使用层1/层2(L1/L2)信令(例如，小区切换命令及下行控制信息)触发小区切换，但需要区分该信令用于某一个候选小区，否则终端设备难以识别出进行小区切换的候选小区。
因此，有必要提出一种在基于L1/L2信令的小区切换过程中，使终端设备能识别出候选小区的解决方案。
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小区切换方法、通信设备及存储介质，旨在解决基于L1/L2信令的小区切换过程中，使终端设备能识别出候选小区。
本申请提供的一种小区切换方法，可应用于终端设备(如手机)，包括以下步骤：
S2：基于无线资源控制信令、下行控制信息、随机接入响应及小区切换命令中的至少一项进行小区切换。
可选地，所述方法还包括以下至少一项：
所述无线资源控制信令包括候选小区配置和/或指示信息参数；
所述下行控制信息包括源小区判定字段、指示信息字段、层1/层2候选索引值、候选小区索引值中的至少一项。
可选地，所述候选小区配置包括候选小区索引值、层1/层2候选索引值、候选小区索引值列表及小区索引值列表中的至少一项。
可选地，步骤S2包括步骤：
S21：基于下行控制信息传输物理随机接入信道，接收随机接入响应和/或小区切换命令；
S22：基于所述随机接入响应和/或小区切换命令选取或确定上行资源指示信息；
S23：根据下行控制信息和/或小区切换命令选取或确定目标小区；
S24：确定或生成确认消息，并基于上行资源指示信息将确认消息发送至目标小区。
可选地，步骤S2还包括以下至少一项：
基于无线资源控制信令从特殊小区配置信息元素和/或辅小区配置信息元素中选取或确定候选小区的候选小区索引值；
基于小区索引值列表和候选小区索引值列表选取或确定候选小区的候选小区索引值与小区索引值的对应关系。
可选地，所述基于下行控制信息传输物理随机接入信道，包括以下至少一项：
根据源小区判定字段的取值、层1/层2候选索引值及候选小区索引值中的至少一项，向对应小区进行物理随机接入信道传输；
根据源小区判定字段的取值、层1/层2候选索引值、候选小区索引值、候选小区索引值列表以及小区索引值列表中的至少一项，向对应小区进行物理随机接入信道传输。
可选地，所述S22步骤，包括以下至少一项：
根据所述随机接入响应和/或小区切换命令选取或确定上行资源指示信息；
根据指示信息字段或参数的取值从随机接入响应和/或小区切换命令中选取或确定上行资源指示信息。
可选地，所述S23步骤，包括以下至少一项：
根据下行控制信息中的层1/层2候选索引值、候选小区索引值以及小区组配置信息元素中候选小区索引值列表、小区索引值列表中的至少一项，得到目标小区；
根据小区切换命令中的层1/层2候选索引值、候选小区索引值以及小区组配置信息元素中候选小区索引值列表、小区索引值列表中的至少一项，得到目标小区。
可选地，所述确认消息包括层1/层2候选索引值和/或候选小区索引值。
本申请还提供一种小区切换方法，可应用于网络设备(如基站)，包括以下步骤：
S1：发送下行信息，以使终端设备基于下行信息进行小区切换。
可选地，所述方法还包括以下至少一项：
下行信息包括以下至少一项：无线资源控制信令、下行控制信息、随机接入响应和/或小区切换命令；
接收物理随机接入信道和/或确认消息。
可选地，所述方法还包括以下至少一项：
发送无线资源控制信令的步骤之前，还包括以下至少一项：
在特殊小区配置信息元素和/或辅小区配置信息元素中增加候选小区索引值参数；
在小区组配置信息元素中配置小区索引值列表参数和/或候选小区索引值列表参数；
在无线资源控制信令中增加指示信息参数。
可选地，发送下行控制信息的步骤之前，还包括在下行控制信息中增加源小区判定字段、指示信息字段、层1/层2候选索引值字段、候选小区索引值字段中的至少一项。
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小区切换程序，所述小区切换程序被所述处理器执行时实现如上任一所述的小区切换方法的步骤。
本申请还提供一种存储介质，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上任一所述的小区切换方法的步骤。
本申请技术方案通过基于无线资源控制信令、下行控制信息、随机接入响应及小区切换命令中的至少一项进行小区切换，在无线资源控制信令、下行控制信息、随机接入响应和/或小区切换命令中增加候选小区标识，用于L1和/或L2信令传输，使终端设备能识别进行小区切换的候选小区。
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小区切换方法的流程示意图；
图6为根据第二实施例示出的小区切换方法的流程示意图；
图7为根据第三实施例示出的小区切换方法的流程示意图；
图8为根据第四实施例示出的小区切换方法的流程示意图；
图9为根据第五实施例示出的小区切换方法的流程示意图；
图10为根据第七实施例示出的小区切换方法的流程示意图；
图11为根据第八实施例示出的小区切换方法的流程示意图；
图12为根据第八实施例示出的小区切换方法的另一流程示意图；
图13为本申请实施例提供的小区切换装置的结构示意图一；
图14为本申请实施例提供的小区切换装置的结构示意图二；
图15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小区切换方法的流程示意图，本申请实施例的小区切换方法可应用于终端设备(如手机)，包括以下步骤：
S2：基于无线资源控制信令、下行控制信息、随机接入响应及小区切换命令中的至少一项进行小区切换。
本申请实施例中，在L1/L2候选配置信息元素(例如：Candidates-L1L2-Config-r18)中包含待添加和修改的L1/L2候选列表参数(例如：candidates-L1L2-ToAddModList-r18)，该参数的类型是待添加和修改的L1/L2候选列表信息元素(例如：Candidates-L1L2-ToAddModList-r18)，该信息元素包含maxNrofL1L2Candidates-r18个待添加和修改的L1/L2候选信息元素(例如：Candidates-L1L2-ToAddMod-r18)，每个待添加和修改的L1/L2候选信息元素包含L1/L2候选索引值参数(例如：candidates-L1L2-Id-r18)和L1/L2候选小区配置参数(例如：candidates-L1L2-CellsConfig-r18)，可选地，L1/L2候选小区配置参数由小区组配置信息元素(例如：CellGroupConfig)确定。
可选地，待添加和修改的L1/L2候选信息元素配置的所有候选小区是指待添加和修改的L1/L2候选信息元素包含的L1/L2候选小区配置参数对应的小区组配置信息元素配置的所有候选小区。
可选地，待添加和修改的L1/L2候选列表信息元素配置的所有候选小区是指待添加和修改的L1/L2候选列表信息元素配置的所有待添加和修改的L1/L2候选信息元素配置的候选小区，即：所有待添加和修改的L1/L2候选信息元素包含的L1/L2候选小区配置参数对应的小区组配置信息元素配置的候选小区。
需要说明的是，本申请实施例中涉及的参数结构及命名不构成对参数的具体结构和命名方式的限 定，未来的通信标准或协议中采用的其它参数结构及命名与本申请实施例中的整体结构及逻辑对应即属于本申请的保护范围之内。可选地，RRCReconfiguration-vXXXX-Ies信息元素中XXXX表示版本号，例如：1530；RRCReconfiguration-vYYYY-Ies信息元素中YYYY表示版本号，例如：1540。
在现有协议中，通过Xn接口信息交互以及RRC(Radio Resource Control，无线资源控制)消息完成小区切换，在移动性场景中，如果通过源小区发送PDCCH order触发终端设备向候选小区进行随机接入以及对应的小区切换过程，此时，层1/层2(L1/L2,Layer 1/Layer 2)信令需要携带候选小区索引值，用于区分该信令用于源小区或某一个候选小区，而小区PCI(Physical Cell Identifier，物理小区标识)不能作为该用途使用。本申请实施例中，将候选小区标识用于在L1/L2信令传输中标识特别小区和/或辅小区。
可选地，候选小区标识包括源小区判定字段、指示信息字段或参数、L1/L2候选索引值字段或参数、候选小区索引值字段或参数、候选小区索引值列表参数及小区索引值列表参数中至少一项。
可选地，所述无线资源控制信令包括候选小区配置和/或指示信息参数。
可选地，所述下行控制信息包括源小区判定字段、指示信息字段、L1/L2候选索引值、候选小区索引值中的至少一项。
可选地，所述候选小区配置包括候选小区索引值、L1/L2候选索引值、候选小区索引值列表及小区索引值列表中的至少一项。
可选地，RRC中增加候选小区索引值，用于在L1/L2信息传输中标识特别小区和/或辅小区，可以为以下至少一项：
(1)在待添加和修改的L1/L2候选列表信息元素配置的所有候选小区中定义候选小区索引值：在待添加和修改的L1/L2候选列表信息元素配置的所有的候选小区中统一编号；
(2)在待添加和修改的L1/L2候选信息元素配置的所有候选小区中定义候选小区索引值：在当前待添加和修改的L1/L2候选信息元素配置的所有的候选小区中编号；
(3)在小区组配置信息元素中增加小区索引值列表参数和候选小区索引值列表参数:通过小区索引值列表和候选小区索引值列表得到候选小区的候选小区索引值与小区索引值的对应关系。
可选地，当下行控制信息(DCI，Downlink Control Information)(例如：DCI格式1_0)用于由物理下行控制信道命令(PDCCH order,Physical Downlink Control Channel order)发起的随机接入过程时，即：下行控制信息携带物理下行控制信道命令，在下行控制信息中增加小区标识以区分该下行控制信息触发终端设备向源小区或某一个候选小区进行PRACH传输，可以为以下至少一项：
(1)根据在待添加和修改的L1/L2候选列表信息元素配置的所有候选小区中定义候选小区索引值标识：只根据候选小区索引值标识；
(2)根据在待添加和修改的L1/L2候选信息元素配置的所有候选小区中定义候选小区索引值标识：根据L1/L2候选索引值和/或候选小区索引值标识；
(3)根据小区组配置信息元素中增加的小区索引值列表参数和候选小区索引值列表参数标识：根据L1/L2候选索引值和/或候选小区索引值标识。
可选地，获取上行资源可以通过以下三种方式中的至少一项：
(1)根据随机接入响应中上行授权信息获取上行资源；
(2)根据小区切换命令获取上行资源；
(3)根据指示信息从随机接入响应或小区切换命令获取上行资源。
可选地，确定发送确认消息的目标小区，可以为以下至少一项：
(1)根据PDCCH order和/或小区切换命令中候选小区索引值得到目标小区的小区索引值；
(2)根据PDCCH order和/或小区切换命令中L1/L2候选索引值和/或候选小区索引值得到目标小区的小区索引值；
(3)根据PDCCH order和/或小区切换命令中L1/L2候选索引值和/或候选小区索引值以及候选小区索引值列表与小区索引值列表的对应关系得到目标小区的小区索引值。
可选地，确认消息中的目标小区可以通过以下三种方式中的至少一项进行指示：
(1)MAC CE中增加L1/L2候选索引值指示；
(2)MAC CE中增加L1/L2候选索引值和候选小区索引值指示；
(3)MAC CE中增加L1/L2候选索引值和候选小区索引值，并通过候选小区索引值列表与小区索引值列表的对应关系指示。
本实施例通过上述方案，具体通过基于无线资源控制信令、下行控制信息、随机接入响应及小区切换命令中的至少一项进行小区切换，在无线资源控制信令、下行控制信息、随机接入响应和/或小区切换命令中增加候选小区标识，用于L1和/或L2信令传输，使终端设备能识别进行小区切换的候选小区。
第二实施例
在本申请第一实施例的基础上，本实施例公开了步骤S2。参照图6，图6为根据第二实施例示出的小区切换方法的流程示意图，具体步骤包括：
S21：基于下行控制信息传输物理随机接入信道，接收随机接入响应和/或小区切换命令；
S22：基于所述随机接入响应和/或小区切换命令选取或确定上行资源指示信息；
S23：根据下行控制信息和/或小区切换命令选取或确定目标小区；
S24：确定或生成确认消息，并基于上行资源指示信息将确认消息发送至目标小区。
可选地，在基于下行控制信息传输物理随机接入信道，接收随机接入响应和/或小区切换命令的步 骤之前，还包括以下至少一项：
基于无线资源控制信令从特殊小区配置信息元素和/或辅小区配置信息元素中选取或确定候选小区的候选小区索引值；
基于小区索引值列表和候选小区索引值列表选取或确定候选小区的候选小区索引值与小区索引值的对应关系。
可选地，RRC中增加候选小区索引值参数，用于在L1/L2信息传输中标识特别小区和/或辅小区。
可选地，在待添加和修改的L1/L2候选列表信息元素配置的所有候选小区中定义候选小区索引值：在待添加和修改的L1/L2候选列表信息元素配置的所有的候选小区中统一编号。
可选地，在特殊小区配置(例如：SpCellConfig)信息元素中增加候选小区索引值参数(例如：candidateCellIndex)用于在层1/层2(例如：L1/L2)信息传输中标识该特殊小区，和/或，如果小区组配置信息元素(例如：CellGroupConfig)配置了辅小区配置(例如：SCellConfig)信息元素，则在辅小区配置信息元素中增加候选小区索引值参数(例如：candidateCellIndex)用于在L1/L2信息传输中标识该辅小区。
可选地，在待添加和修改的L1/L2候选列表信息元素配置的所有候选小区中定义候选小区索引值，表示候选小区索引值参数(例如：candidateCellIndex)在待添加和修改的L1/L2候选列表信息元素配置的所有候选小区中统一编号。待添加和修改的L1/L2候选列表信息元素配置的所有候选小区是指待添加和修改的L1/L2候选列表信息元素配置的所有待添加和修改的L1/L2候选信息元素配置的候选小区，即：所有待添加和修改的L1/L2候选信息元素包含的L1/L2候选小区配置参数对应的小区组配置信息元素配置的候选小区。可选地，参数maxNrofCandidateCells是待添加和修改的L1/L2候选列表信息元素配置的最大候选小区个数。
可选地，通过统一进行候选小区编号，只使用一个候选小区索引值参数就能唯一地标识待添加和修改的L1/L2候选列表信息元素中配置的一个候选小区。
可选地，在待添加和修改的L1/L2候选信息元素配置的所有候选小区中定义候选小区索引值：在当前待添加和修改的L1/L2候选信息元素配置的所有候选小区中编号。
可选地，在特殊小区配置信息元素中增加候选小区索引值参数(例如：candidateCellIndex)用于在 L1/L2信息传输中标识该特殊小区，和/或，如果小区组配置信息元素配置了辅小区配置信息元素，则在辅小区配置信息元素中增加候选小区索引值参数用于在L1/L2信息传输中标识该辅小区。
可选地，在待添加和修改的L1/L2候选信息元素配置的所有候选小区中定义候选小区索引值，表示候选小区索引值参数(例如：candidateCellIndex)在当前待添加和修改的L1/L2候选信息元素配置的所有的候选小区中编号。待添加和修改的L1/L2候选信息元素配置的所有的候选小区是指待添加和修改的L1/L2候选信息元素包含的L1/L2候选小区配置参数对应的小区组配置信息元素配置的所有候选小区。
可选地，使用L1/L2候选索引值参数(例如：candidates-L1L2-Id-r18)和/或候选小区索引值参数就能唯一地标识当前待添加和修改的L1/L2候选信息元素中配置的一个候选小区。
可选地，候选小区索引值参数(例如：CandidateCellIndex)的取值从 0到(maxNrofCandidateCellsPerCellConfig-1)，可选地，参数maxNrofCandidateCellsPerCellConfig是待添加和修改的L1/L2候选信息元素中配置的最大候选小区数，例如：
CandidateCellIndex::＝INTEGER(0..maxNrofCandidateCellsPerCellConfig-1)
可选地，候选小区索引值参数(例如：CandidateCellIndex)的取值从 1到maxNrofCandidateCellsPerCellConfig，例如：
CandidateCellIndex::＝INTEGER(1..maxNrofCandidateCellsPerCellConfig)
由此不受其他待添加和修改的L1/L2候选信息元素中配置的候选小区的候选小区索引值编号影响，并且maxNrofCandidateCellsPerCellGroup参数数值较小。
可选地，在小区组配置信息元素中增加小区索引值列表参数和候选小区索引值列表参数:通过小区索引值列表和候选小区索引值列表得到候选小区的候选小区索引值与小区索引值的对应关系。
可选地，小区组配置信息元素(例如：CellGroupConfig)中可以包括特殊小区和辅小区，可选地，当配置载波聚合和/或双链接场景时，该小区组配置信息元素包含一个或多个辅小区。如果在小区组配置信息元素中增加小区索引值列表参数(例如：cellIndexList)和候选小区索引值列表参数(例如：candidateCellIndexList)，则可以通过候选小区索引值列表与小区索引值列表(例如：cellIndexList)得到候选小区的候选小区索引值与小区索引值的对应关系，从而根据候选小区的候选小区索引值得到候选小区的小区索引值。可选地，小区索引值列表中每个元素是小区索引值，如果是特殊小区，这个小区索引值是特殊小区的服务小区索引值(例如：servCellIndex)或物理小区标识(例如：PCI)；如果是辅小区，这个小区索引值是辅小区的辅小区索引值(例如：sCellIndex)或物理小区标识(例如：PCI)。候选小区索引值列表中每个元素是小区组配置信息元素包含的候选小区对应的候选小区索引值，即：每个候选小区配置一个候选小区索引值，用于在L1/L2信息传输中标识该候选小区。从而，可以使用L1/L2候选索引值参数(例如：candidates-L1L2-Id-r18)、候选小区索引值、候选小区索引值列表以及小区索引值列表等至少一项就能唯一地标识当前待添加和修改的L1/L2候选信息元素中配置的一个候选小区。
可选地，对于候选小区索引值列表与小区索引值列表的对应关系，这两个列表中元素个数相同，并且按照列表中元素顺序，两个列表中元素有一一对应关系。基于小区索引值列表和候选小区索引值列表选取或确定候选小区的候选小区索引值与小区索引值的对应关系。例如：候选小区索引值列表中第一个候选小区索引值对应于小区索引值列表中第一个小区索引值，候选小区索引值列表中第二个候选小区索引值对应于小区索引值列表中第二个小区索引值，以此类推。可选地，如果小区组配置信息元素只包含一个小区，候选小区索引值列表与小区索引值列表的第一个元素对应于该小区，根据候选小区索引值列表中第一个候选小区索引值从小区索引值列表中得到该小区索引值；如果小区组配置信息元素包含多个小区，候选小区索引值列表与小区索引值列表的第一个元素对应于特殊小区，根据候选小区索引值列表中第一个候选小区索引值从小区索引值列表中得到特殊小区的小区索引值(例如：servCellIndex或PCI)，候选小区索引值列表与小区索引值列表的第二个元素开始对应于辅小区，根据类似的对应关系得到辅小区的小区索引值(例如：sCellIndex或PCI)。
可选地，候选小区索引值参数(例如：CandidateCellIndex)的取值从 0到(maxNrofCandidateCellsPerCellConfig-1)，可选地，参数maxNrofCandidateCellsPerCellConfig是待添加和修改的L1/L2候选信息元素中配置的最大候选小区数，例如：
CandidateCellIndex::＝INTEGER(0..maxNrofCandidateCellsPerCellConfig-1)
可选地，候选小区索引值参数(例如：CandidateCellIndex)的取值从 1到maxNrofCandidateCellsPerCellConfig，例如：
CandidateCellIndex::＝INTEGER(1..maxNrofCandidateCellsPerCellConfig)
通过在小区组配置信息元素中增加小区索引值列表参数和候选小区索引值列表参数，不受其他待添加和修改的L1/L2候选信息元素中配置的候选小区的候选小区索引值编号影响，并且通过额外配置小区索引值列表(例如：cellIndexList)和候选小区索引值列表(例如：candidateCellIndexList)对应关系得到候选小区的小区索引值，对现有参数改动较小，例如：SpCellConfig和SCellConfig。
本实施例通过上述方案，具体通过基于无线资源控制信令从特殊小区配置信息元素和/或辅小区配置信息元素中选取或确定候选小区的候选小区索引值；基于小区索引值列表和候选小区索引值列表选取或确定候选小区的候选小区索引值与小区索引值的对应关系。通过L1/L2候选索引值和/或候选小区索引值标识候选小区，在待添加和修改的L1/L2候选信息元素配置的所有候选小区中定义候选小区索引值，避免受其他待添加和修改的L1/L2候选信息元素中配置的候选小区的候选小区索引值编号影响；通过在小区组配置信息元素中增加小区索引值列表参数和候选小区索引值列表参数，不受其他待添加和修改的L1/L2候选信息元素中配置的候选小区的候选小区索引值编号影响，并且通过额外配置小区索引值列表和候选小区索引值列表对应关系得到候选小区的小区索引值，对现有参数改动较小。
第三实施例
在本申请第一实施例及第二实施例的基础上，本实施例公开了基于下行控制信息传输物理随机接入信道的具体方法。参照图7，图7为根据第三实施例示出的小区切换方法的流程示意图，示出了基于下行控制信息传输物理随机接入信道的具体步骤，可以为以下至少一项：
S211：根据源小区判定字段的取值、L1/L2候选索引值及候选小区索引值中的至少一项，向对应小区进行物理随机接入信道传输；
S212：根据源小区判定字段的取值、L1/L2候选索引值、候选小区索引值、候选小区索引值列表以及小区索引值列表中的至少一项，向对应小区进行物理随机接入信道传输。
可选地，本申请实施例中，当下行控制信息(例如：DCI格式1_0)用于由物理下行控制信道命令发起的随机接入过程时，即：下行控制信息携带物理下行控制信道命令，在下行控制信息中增加小区标识以区分该物理下行控制信道命令触发终端设备向源小区或某一个候选小区进行物理随机接入信道(PRACH，Physical Random Access Channel)传输。
可选地，根据在待添加和修改的L1/L2候选列表信息元素配置的所有候选小区中定义候选小区索引值标识：只根据候选小区索引值标识。
可选地，在下行控制信息(例如：DCI格式1_0)中增加一个源小区判定字段，或使用下行控制信息(例如：DCI格式1_0)中的保留比特作为源小区判定字段，可选地，这两种方法得到的源小区判定字段的位宽都是1比特，该源小区判定字段用于指示终端设备是否向源小区进行PRACH传输。如果该字段取值为1表示物理下行控制信道命令触发终端设备向源小区进行PRACH传输，和/或，如果该字段取值为0表示物理下行控制信道命令触发终端设备向候选小区进行PRACH传输，反之亦然。在下行控制信息(例如：DCI格式1_0)中增加一个候选小区索引值字段，或使用下行控制信息(例如：DCI格式1_0)中的保留比特作为候选小区索引值字段，该候选小区索引值字段用于指示一个候选小区的候选小区索引值参数(例如：candidateCellIndex)。如果向候选小区进行PRACH传输，终端设备根据候选小区索引值字段的取值从待添加和修改的L1/L2候选列表信息元素中配置的所有候选小区中选择或确定一个候选小区，即：候选小区索引值字段的取值与该选择或确定的候选小区对应的特殊小区配置信息元素或辅小区配置信息元素包含的候选小区索引值参数(例如：candidateCellIndex)的取值相同，和/或，确定候选小区的小区索引值(例如：服务小区索引值(例如：servCellIndex)或辅小区索引值(例如：sCellIndex)或物理小区标识(例如：PCI))，终端设备向该候选小区进行PRACH传输。如果向源小区进行PRACH传输，直接进行PRACH传输，不考虑候选小区索引值。
可选地，在下行控制信息(例如：DCI格式1_0)中增加一个候选小区索引值字段，或使用下行控制信息(例如：DCI格式1_0)中的保留比特作为候选小区索引值字段，该候选小区索引值字段用于指示一个候选小区的候选小区索引值参数(例如：candidateCellIndex)。终端设备根据候选小区索引值字段的取值从待添加和修改的L1/L2候选列表信息元素中配置的所有候选小区中选择或确定一个候选小区，即：候选小区索引值字段的取值与该候选小区对应的特殊小区配置信息元素或辅小区配置信息元素包含的候选小区索引值参数(例如：candidateCellIndex)的取值相同，终端设备向该候选小区进行PRACH传输。
可选地，候选小区索引值字段的取值为0，表示物理下行控制信道命令触发终端设备向源小区进行PRACH传输。
可选地，根据在待添加和修改的L1/L2候选信息元素配置的所有候选小区中定义候选小区索引值标识：根据L1/L2候选索引值和/或候选小区索引值标识。
可选地，在下行控制信息(例如：DCI格式1_0)中增加一个源小区判定字段，或使用下行控制信息(例如：DCI格式1_0)中的保留比特作为源小区判定字段，可选地，这两种方法得到的源小区判定字段的位宽都是1比特，该源小区判定字段用于指示终端设备是否向源小区进行PRACH传输。如果该字段取值为1表示物理下行控制信道命令触发终端设备向源小区进行PRACH传输，和/或，如果该字段取值为0表示物理下行控制信道命令触发终端设备向候选小区进行PRACH传输，反之亦然。在下行控制信息(例如：DCI格式1_0)中增加一个L1/L2候选索引值字段，或使用下行控制信息(例如：DCI 格式1_0)中的保留比特作为L1/L2候选索引值字段，该L1/L2候选索引值字段用于指示一个待添加和修改的L1/L2候选信息元素(例如：Candidates-L1L2-ToAddMod-r18)的L1/L2候选索引值参数(例如：candidates-L1L2-Id-r18)。如果向候选小区进行PRACH传输，终端设备根据该L1/L2候选索引值字段的取值从待添加和修改的L1/L2候选列表信息元素(例如：Candidates-L1L2-ToAddModList-r18)中选择或确定一个待添加和修改的L1/L2候选信息元素，即：L1/L2候选索引值字段的取值与该选择或确定的待添加和修改的L1/L2候选信息元素的L1/L2候选索引值参数(例如：candidates-L1L2-Id-r18)的取值相同，并根据该待添加和修改的L1/L2候选信息元素得到对应的小区组配置信息元素。在下行控制信息(例如：DCI格式1_0)中增加一个候选小区索引值字段，或使用下行控制信息(例如：DCI格式1_0)中的保留比特作为候选小区索引值字段，该候选小区索引值字段用于指示一个候选小区的候选小区索引值参数(例如：candidateCellIndex)。如果向候选小区进行PRACH传输，终端设备根据候选小区索引值字段的取值从选择或确定的待添加和修改的L1/L2候选信息元素中配置的所有候选小区中选择或确定一个候选小区，即：候选小区索引值字段的取值与该候选小区对应的特殊小区配置信息元素或辅小区配置信息元素包含的候选小区索引值参数(例如：candidateCellIndex)的取值相同，和/或，确定候选小区的小区索引值(例如：服务小区索引值(例如：servCellIndex)或辅小区索引值(例如：sCellIndex)或物理小区标识(例如：PCI))，终端设备向该候选小区进行PRACH传输。如果向源小区进行PRACH传输，直接进行PRACH传输，不考虑L1/L2候选索引值与候选小区索引值。
可选地，在RRC信令中增加一个候选小区索引值配置判定参数，如果候选小区索引值配置判定参数配置为使能或取值为1，表示在下行控制信息(例如：DCI格式1_0)中增加一个候选小区索引值字段或使用下行控制信息(例如：DCI格式1_0)中的保留比特作为候选小区索引值字段；如果候选小区索引值配置判定参数配置为不使能或取值为0，表示无需在下行控制信息中增加一个候选小区索引值字段或无需使用下行控制信息中的保留比特作为候选小区索引值字段。可选地，使用默认规则，当配置载波聚合和/或双链接场景时，在下行控制信息(例如：DCI格式1_0)中增加一个候选小区索引值字段或使用下行控制信息(例如：DCI格式1_0)中的保留比特作为候选小区索引值字段；当没有配置载波聚合和/或双链接场景时，无需在下行控制信息中增加一个候选小区索引值字段或无需使用下行控制信息中的保留比特作为候选小区索引值字段。该候选小区索引值字段用于指示一个候选小区的候选小区索引值参数(例如：candidateCellIndex)。
在下行控制信息(例如：DCI格式1_0)中增加一个源小区判定字段，或使用下行控制信息(例如：DCI格式1_0)中的保留比特作为源小区判定字段，可选地，这两种方法得到的源小区判定字段的位宽都是1比特，该源小区判定字段用于指示终端设备是否向源小区进行PRACH传输。如果该字段取值为1表示物理下行控制信道命令触发终端设备向源小区进行PRACH传输，和/或，如果该字段取值为0表示物理下行控制信道命令触发终端设备向候选小区进行PRACH传输，反之亦然。在下行控制信息(例如：DCI格式1_0)中增加一个L1/L2候选索引值字段，或使用下行控制信息(例如：DCI格式1_0)中的保留比特作为L1/L2候选索引值字段，该L1/L2候选索引值字段用于指示一个待添加和修改的L1/L2候选信息元素的L1/L2候选索引值参数(例如：candidates-L1L2-Id-r18)。如果向候选小区进行PRACH传输，终端设备根据该L1/L2候选索引值字段的取值从待添加和修改的L1/L2候选列表信息元素中选择或确定一个待添加和修改的L1/L2候选信息元素，即：L1/L2候选索引值字段的取值与该待添加和修改的L1/L2候选信息元素的L1/L2候选索引值参数(例如：candidates-L1L2-Id-r18)的取值相同，并根据该待添加和修改的L1/L2候选信息元素得到对应的小区组配置信息元素。
如果候选小区索引值配置判定参数配置为使能或取值为1，或，配置载波聚合和/或双链接场景时，在下行控制信息(例如：DCI格式1_0)中增加一个候选小区索引值字段或使用下行控制信息(例如：DCI格式1_0)中的保留比特作为候选小区索引值字段，该候选小区索引值字段用于指示一个候选小区的候选小区索引值参数(例如：candidateCellIndex)。如果向候选小区进行PRACH传输，终端设备根据候选小区索引值字段的取值从选择或确定的待添加和修改的L1/L2候选信息元素中配置的所有候选小区中选择或确定一个候选小区，即：候选小区索引值字段的取值与该候选小区对应的特殊小区配置信息元素或辅小区配置信息元素包含的候选小区索引值参数(例如：candidateCellIndex)的取值相同，和/或，确定候选小区的小区索引值(例如：服务小区索引值(例如：servCellIndex)或辅小区索引值(例如：sCellIndex)或物理小区标识(例如：PCI))，终端设备向该候选小区进行PRACH传输。如果向源小区进行PRACH传输，直接进行PRACH传输，不考虑L1/L2候选索引值与候选小区索引值。
如果候选小区索引值配置判定参数配置为不使能或取值为0，或，没有配置载波聚合和/或双链接场景时，下行控制信息中没有候选小区索引值字段，终端设备从选择或确定的待添加和修改的L1/L2候选信息元素中得到L1/L2候选小区配置参数对应的小区组配置信息元素得到特殊小区配置信息元素，从而确定候选小区，即：小区组配置信息元素中配置的特殊小区。此时，如果向候选小区进行PRACH传输，终端设备根据L1/L2候选索引值字段确定候选小区，并向候选小区进行PRACH传输。如果向源小区进行PRACH传输，直接进行PRACH传输，不考虑L1/L2候选索引值。
可选地，在下行控制信息(例如：DCI格式1_0)中增加一个L1/L2候选索引值字段，或使用下行控制信息(例如：DCI格式1_0)中的保留比特作为L1/L2候选索引值字段，该L1/L2候选索引值字段用于指示一个待添加和修改的L1/L2候选信息元素的L1/L2候选索引值参数(例如：candidates-L1L2-Id-r18)。终端设备根据该L1/L2候选索引值字段的取值从待添加和修改的L1/L2候选列表信息元素中选择或确定一个待添加和修改的L1/L2候选信息元素，即：L1/L2候选索引值字段的取值与该待添加和修改的L1/L2候选信息元素的L1/L2候选索引值参数(例如：candidates-L1L2-Id-r18) 的取值相同，并根据该待添加和修改的L1/L2候选信息元素得到对应的小区组配置信息元素。在下行控制信息(例如：DCI格式1_0)中增加一个候选小区索引值字段，或使用下行控制信息(例如：DCI格式1_0)中的保留比特作为候选小区索引值字段，该候选小区索引值字段用于指示一个候选小区的候选小区索引值参数(例如：candidateCellIndex)。终端设备根据候选小区索引值字段的取值从选择或确定的待添加和修改的L1/L2候选信息元素中配置的所有候选小区中选择或确定一个候选小区，即：候选小区索引值字段的取值与该候选小区对应的特殊小区配置信息元素或辅小区配置信息元素包含的候选小区索引值参数(例如：candidateCellIndex)的取值相同，终端设备向该候选小区进行PRACH传输。
可选地，L1/L2候选索引值字段的取值为0和/或候选小区索引值字段的取值为0，表示物理下行控制信道命令触发终端设备向源小区进行PRACH传输。
可选地，根据小区组配置信息元素中增加的小区索引值列表参数和候选小区索引值列表参数标识：根据L1/L2候选索引值和/或候选小区索引值标识。
可选地，在下行控制信息(例如：DCI格式1_0)中增加一个源小区判定字段，或使用下行控制信息(例如：DCI格式1_0)中的保留比特作为源小区判定字段，可选地，这两种方法得到的源小区判定字段的位宽都是1比特，该源小区判定字段用于指示终端设备是否向源小区进行PRACH传输。如果该字段取值为1表示物理下行控制信道命令触发终端设备向源小区进行PRACH传输，和/或，如果该字段取值为0表示物理下行控制信道命令触发终端设备向候选小区进行PRACH传输，反之亦然。在下行控制信息(例如：DCI格式1_0)中增加一个L1/L2候选索引值字段，或使用下行控制信息(例如：DCI格式1_0)中的保留比特作为L1/L2候选索引值字段，该L1/L2候选索引值字段用于指示一个待添加和修改的L1/L2候选信息元素(例如：Candidates-L1L2-ToAddMod-r18)的L1/L2候选索引值参数(例如：candidates-L1L2-Id-r18)。如果向候选小区进行PRACH传输，终端设备根据该L1/L2候选索引值字段的取值从待添加和修改的L1/L2候选列表信息元素(例如：Candidates-L1L2-ToAddModList-r18)中选择或确定一个待添加和修改的L1/L2候选信息元素，即：L1/L2候选索引值字段的取值与该选择或确定的待添加和修改的L1/L2候选信息元素的L1/L2候选索引值参数(例如：candidates-L1L2-Id-r18)的取值相同，并根据该待添加和修改的L1/L2候选信息元素得到对应的小区组配置信息元素。在下行控制信息(例如：DCI格式1_0)中增加一个候选小区索引值字段，或使用下行控制信息(例如：DCI格式1_0)中的保留比特作为候选小区索引值字段，该候选小区索引值字段用于指示一个候选小区的候选小区索引值，即：该候选小区索引值对应于候选小区索引值列表(例如：candidateCellIndexList)的一个取值。基于小区索引值列表和候选小区索引值列表选取或确定候选小区的候选小区索引值与小区索引值的对应关系。根据候选小区索引值字段的取值以及候选小区的候选小区索引值与小区索引值的对应关系得到该候选小区的小区索引值。如果向候选小区进行PRACH传输，终端设备根据候选小区的小区索引值，向该候选小区进行PRACH传输。如果向源小区进行PRACH传输，直接进行PRACH传输，不考虑L1/L2候选索引值与候选小区索引值。
可选地，在下行控制信息(例如：DCI格式1_0)中增加一个L1/L2候选索引值字段，或使用下行控制信息(例如：DCI格式1_0)中的保留比特作为L1/L2候选索引值字段，该L1/L2候选索引值字段用于指示一个待添加和修改的L1/L2候选信息元素的L1/L2候选索引值参数(例如：candidates-L1L2-Id-r18)。终端设备根据该L1/L2候选索引值字段的取值从待添加和修改的L1/L2候选列表信息元素中选择或确定一个待添加和修改的L1/L2候选信息元素，即：L1/L2候选索引值字段的取值与该选择或确定的待添加和修改的L1/L2候选信息元素的L1/L2候选索引值参数(例如：candidates-L1L2-Id-r18)的取值相同，并根据该待添加和修改的L1/L2候选信息元素得到对应的小区组配置信息元素。在下行控制信息(例如：DCI格式1_0)中增加一个候选小区索引值字段，或使用下行控制信息(例如：DCI格式1_0)中的保留比特作为候选小区索引值字段，该候选小区索引值字段用于指示一个候选小区的候选小区索引值，即：该候选小区索引值对应于候选小区索引值列表(例如：candidateCellIndexList)的一个取值。基于小区索引值列表和候选小区索引值列表选取或确定候选小区的候选小区索引值与小区索引值的对应关系。根据候选小区索引值字段的取值以及候选小区的候选小区索引值与小区索引值的对应关系得到该候选小区的小区索引值，终端设备向该候选小区进行PRACH传输。
可选地，L1/L2候选索引值字段的取值为0和/或候选小区索引值字段的取值为0，表示物理下行控制信道命令触发终端设备向源小区进行PRACH传输。
可选地，本申请实施例中小区切换命令对候选小区的标识主要包括根据在待添加和修改的L1/L2候选信息元素配置的所有候选小区中定义候选小区索引值标识和/或根据小区组配置信息元素中增加的小区索引值列表参数和候选小区索引值列表参数标识。
可选地，在小区切换命令中增加一个L1/L2候选索引值字段，该L1/L2候选索引值字段用于指示一个待添加和修改的L1/L2候选信息元素(例如：Candidates-L1L2-ToAddMod-r18)的L1/L2候选索引值参数(例如：candidates-L1L2-Id-r18)。终端设备根据该L1/L2候选索引值字段的取值从待添加和修改的L1/L2候选列表信息元素(例如：Candidates-L1L2-ToAddModList-r18)中选择或确定一个待添加和修改的L1/L2候选信息元素，即：L1/L2候选索引值字段的取值与该选择或确定的待添加和修改的L1/L2候选信息元素的L1/L2候选索引值参数(例如：candidates-L1L2-Id-r18)的取值相同，并根据该待添加和修改的L1/L2候选信息元素得到对应的小区组配置信息元素。在小区切换命令中增加一个候选小区索引值字段，该候选小区索引值字段用于指示一个候选小区的候选小区索引值参数(例如：candidateCellIndex)。终端设备根据候选小区索引值字段的取值从选择或确定的待添加和修改的L1/L2 候选信息元素中配置的所有候选小区中选择或确定一个候选小区，即：候选小区索引值字段的取值与该候选小区对应的特殊小区配置信息元素或辅小区配置信息元素包含的候选小区索引值参数(例如：candidateCellIndex)的取值相同，和/或，确定候选小区的小区索引值(例如：服务小区索引值(例如：servCellIndex)或辅小区索引值(例如：sCellIndex)或物理小区标识(例如：PCI))。因此，终端设备根据L1/L2候选索引值和/或候选小区索引值得到候选小区，该候选小区也称为目标小区，并向该目标小区发送小区切换确认消息。
可选地，在小区切换命令中增加一个L1/L2候选索引值字段，该L1/L2候选索引值字段用于指示一个待添加和修改的L1/L2候选信息元素(例如：Candidates-L1L2-ToAddMod-r18)的L1/L2候选索引值参数(例如：candidates-L1L2-Id-r18)。终端设备根据该L1/L2候选索引值字段的取值从待添加和修改的L1/L2候选列表信息元素(例如：Candidates-L1L2-ToAddModList-r18)中选择或确定一个待添加和修改的L1/L2候选信息元素，即：L1/L2候选索引值字段的取值与该选择或确定的待添加和修改的L1/L2候选信息元素的L1/L2候选索引值参数(例如：candidates-L1L2-Id-r18)的取值相同，并根据该待添加和修改的L1/L2候选信息元素得到对应的小区组配置信息元素。在小区切换命令中增加一个候选小区索引值字段，该候选小区索引值字段用于指示一个候选小区的候选小区索引值，即：该候选小区索引值对应于候选小区索引值列表(例如：candidateCellIndexList)的一个取值。基于小区索引值列表和候选小区索引值列表选取或确定候选小区的候选小区索引值与小区索引值的对应关系。根据候选小区索引值字段的取值以及候选小区的候选小区索引值与小区索引值的对应关系得到该候选小区的小区索引值。因此，终端设备根据L1/L2候选索引值和/或候选小区索引值以及小区索引值列表和候选小区索引值列表得到候选小区，该候选小区也称为目标小区，并向该目标小区发送小区切换确认消息。
本实施例通过上述方案，具体通过根据源小区判定字段的取值、L1/L2候选索引值及候选小区索引值中的至少一项，向对应小区进行物理随机接入信道传输；根据源小区判定字段的取值、L1/L2候选索引值、候选小区索引值、候选小区索引值列表以及小区索引值列表中的至少一项，向对应小区进行物理随机接入信道传输。通过在下行控制信息中增加候选小区标识，终端设备能识别向源小区或某一个候选小区进行PRACH传输。
第四实施例
在本申请上述实施例的基础上，本实施例公开了S22步骤。参照图8，图8为根据第四实施例示出的小区切换方法的流程示意图，示出了基于所述随机接入响应和/或小区切换命令选取或确定上行资源指示信息的具体步骤可以为以下至少一项：
S221：根据所述随机接入响应和/或小区切换命令选取或确定上行资源指示信息；
S222：根据指示信息字段或参数的取值从随机接入响应和/或小区切换命令中选取或确定上行资源指示信息。
本申请实施例中，终端设备通过PDCCH order触发终端设备向目标小区进行PRACH传输，响应于该PRACH传输，目标小区生成随机接入响应。为了给终端设备提供资源用于传输确认消息，根据所述随机接入响应和/或小区切换命令选取或确定上行资源指示信息；和/或，根据指示信息字段或参数的取值从随机接入响应和/或小区切换命令中选取或确定上行资源指示信息。
可选地，直接通过随机接入响应中上行授权信息提供：目标小区将该随机接入响应传输给源小区，源小区直接将该随机接入响应传输给终端设备，终端设备通过上行授权信息指示的上行资源使用物理上行共享信道向目标小区发送确认消息，可选地，上行授权信息包含物理上行共享信道频域资源分配、频域跳频标志、物理上行共享信道时域资源分配、物理上行共享信道发射功率命令(TPC,Transmit Power Command)、调制编码方式(MCS,Modulation and Coding Scheme)和信道状态信息请求等至少一个指示信息。
可选地，通过小区切换命令提供：目标小区将该随机接入响应传输给源小区，源小区将随机接入响应中的上行授权信息通过小区切换命令传输给终端设备，终端设备通过小区切换命令指示的上行资源使用物理上行共享信道向目标小区发送确认消息，和/或，小区切换命令还可以包含传输配置指示(TCI,Transmission Configuration Indication)状态。小区切换命令包含以下至少一项上行资源：物理上行共享信道频域资源分配、频域跳频标志、物理上行共享信道时域资源分配、物理上行共享信道发射功率命令、调制编码方式、信道状态信息请求和传输配置指示状态，可选地，上述资源的比特数分别是14比特、1比特、4比特、3比特、4比特、1比特和7比特。可选地，传输配置指示状态类型是下行/上行联合TCI模式，即：RRC参数unifiedTCI-StateType配置为joint。
可选地，通过网络设备可以对终端设备进行指示，可选地，传输确认消息的上行资源通过以下方式中的至少一种获得：
(1)直接通过随机接入响应中上行授权信息提供；
(2)通过小区切换命令提供。
可选地，通过物理下行控制信道命令(例如：DCI 1_0)和/或RRC参数指示，例如：在下行控制信息(例如：DCI格式1_0)中增加一个指示信息字段，或使用下行控制信息(例如：DCI格式1_0)中的保留比特作为指示信息字段，可选地，这两种方法得到的指示信息字段的位宽都是1比特，该指示信息字段用于指示终端设备，传输确认消息的上行资源通过随机接入响应中上行授权信息提供或者小区切换命令提供。
可选地，如果该字段取值为1表示通过随机接入响应中上行授权信息提供，和/或，如果该字段取值为0表示通过小区切换命令提供，反之亦然。终端设备根据指示信息字段的取值从随机接入响应和/ 或小区切换命令中选取或确定上行资源指示信息用于传输确认消息。
可选地，在RRC中增加一个指示信息参数，如果该参数使能或取值为1，表示通过随机接入响应中上行授权信息提供，和/或，如果该参数不使能或取值为0，表示通过小区切换命令提供，反之亦然。终端设备根据指示信息参数的取值从随机接入响应和/或小区切换命令中选取或确定上行资源指示信息用于传输确认消息。
本实施例通过上述方案，具体通过根据所述随机接入响应和/或小区切换命令选取或确定上行资源指示信息；根据指示信息字段或参数的取值从随机接入响应和/或小区切换命令中选取或确定上行资源指示信息。终端设备通过上述两种方式得到的上行资源使用物理上行共享信道向目标小区发送确认消息，目标小区的标识可以与PDCCH order和/或小区切换命令指示的目标小区相同。
第五实施例
在本申请上述实施例的基础上，本实施例公开了S23步骤。参照图9，图9为根据第五实施例示出的小区切换方法的流程示意图，示出了根据下行控制信息和/或小区切换命令选取或确定目标小区的具体步骤可以为以下至少一项：
S231：根据下行控制信息中的L1/L2候选索引值、候选小区索引值以及小区组配置信息元素中候选小区索引值列表、小区索引值列表中的至少一项，得到目标小区；
S232：根据小区切换命令中的L1/L2候选索引值、候选小区索引值以及小区组配置信息元素中候选小区索引值列表、小区索引值列表中的至少一项，得到目标小区。
本申请实施例中，根据下行控制信息和/或小区切换命令中的L1/L2候选索引值、候选小区索引值以及小区组配置信息元素中候选小区索引值列表以及小区索引值列表中的至少一项确定终端设备发送确认消息的目标小区。
可选地，根据在待添加和修改的L1/L2候选列表信息元素配置的所有候选小区中定义候选小区索引值标识，包括：根据PDCCH order和/或小区切换命令中候选小区索引值字段的取值从待添加和修改的L1/L2候选列表信息元素中配置的所有候选小区中选择或确定一个候选小区，即：候选小区索引值字段的取值与该候选小区对应的特殊小区配置信息元素或辅小区配置信息元素包含的候选小区索引值参数(例如：candidateCellIndex)的取值相同，该候选小区也称为目标小区，和/或，确定目标小区的小区索引值(例如：服务小区索引值(例如：servCellIndex)或辅小区索引值(例如：sCellIndex)或物理小区标识(例如：PCI))，终端设备根据上行资源向该目标小区发送确认消息。
可选地，根据在待添加和修改的L1/L2候选信息元素配置的所有候选小区中定义候选小区索引值标识，包括：根据PDCCH order和/或小区切换命令中L1/L2候选索引值字段的取值从待添加和修改的L1/L2候选列表信息元素中选择或确定一个待添加和修改的L1/L2候选信息元素，即：L1/L2候选索引值字段的取值与该待添加和修改的L1/L2候选信息元素的L1/L2候选索引值参数(例如：candidates-L1L2-Id-r18)的取值相同，并根据该待添加和修改的L1/L2候选信息元素得到对应的小区组配置信息元素。和/或，根据PDCCH order和/或小区切换命令中候选小区索引值字段的取值从选择或确定的待添加和修改的L1/L2候选信息元素中配置的所有候选小区中选择或确定一个候选小区，即：候选小区索引值字段的取值与该候选小区对应的特殊小区配置信息元素或辅小区配置信息元素包含的候选小区索引值参数(例如：candidateCellIndex)的取值相同，该候选小区也称为目标小区，和/或，确定目标小区的小区索引值(例如：服务小区索引值(例如：servCellIndex)或辅小区索引值(例如：sCellIndex)或物理小区标识(例如：PCI))，终端设备根据上行资源向该目标小区发送确认消息。
可选地，根据小区组配置信息元素中增加的小区索引值列表参数和候选小区索引值列表参数标识，包括：根据PDCCH order和/或小区切换命令中L1/L2候选索引值字段的取值从待添加和修改的L1/L2候选列表信息元素中选择或确定一个待添加和修改的L1/L2候选信息元素，即：L1/L2候选索引值字段的取值与该选择或确定的待添加和修改的L1/L2候选信息元素的L1/L2候选索引值参数(例如：candidates-L1L2-Id-r18)的取值相同，并根据该待添加和修改的L1/L2候选信息元素得到对应的小区组配置信息元素。和/或，基于小区索引值列表和候选小区索引值列表选取或确定候选小区的候选小区索引值与小区索引值的对应关系，根据PDCCH order和/或小区切换命令中候选小区索引值字段的取值以及候选小区的候选小区索引值与小区索引值的对应关系得到该候选小区的小区索引值(例如：服务小区索引值(例如：servCellIndex)或辅小区索引值(例如：sCellIndex)或物理小区标识(例如：PCI))，该候选小区也称为目标小区，并根据上行资源向该目标小区发送确认消息。
本实施例通过上述方案，具体通过根据下行控制信息中的L1/L2候选索引值、候选小区索引值以及小区组配置信息元素中候选小区索引值列表、小区索引值列表中的至少一项，得到目标小区；根据小区切换命令中的L1/L2候选索引值、候选小区索引值以及小区组配置信息元素中候选小区索引值列表、小区索引值列表中的至少一项，得到目标小区。根据下行控制信息和/或小区切换命令中的L1/L2候选索引值、候选小区索引值以及小区组配置信息元素中候选小区索引值列表、小区索引值列表中的至少一项确定终端设备发送确认消息的目标小区。
第六实施例
在本申请上述实施例的基础上，本实施例进一步公开了前述实施例中的小区切换方法。
在本申请实施例中，确认消息是通过物理上行共享信道传输的介质访问控制层控制单元(MAC CE,Media Access Control Control Element)，可选地，包含小区无线网络临时标识(C-RNTI,Cell Radio Network Temporary Identifier)和目标小区标识。
可选地，所述确认消息包括L1/L2候选索引值和/或候选小区索引值。
可选地，根据在待添加和修改的L1/L2候选列表信息元素配置的所有候选小区中定义候选小区索引值标识，包括：在MAC CE中增加增加一个候选小区索引值字段，该候选小区索引值字段用于指示一个候选小区的候选小区索引值参数(例如：candidateCellIndex)。终端设备根据候选小区索引值字段的取值从待添加和修改的L1/L2候选列表信息元素中配置的所有候选小区中选择或确定一个候选小区，即：候选小区索引值字段的取值与该候选小区对应的特殊小区配置信息元素或辅小区配置信息元素包含的候选小区索引值参数(例如：candidateCellIndex)的取值相同，该候选小区也称为目标小区，网络设备根据候选小区索引值可以得到目标小区的小区索引值(例如：服务小区索引值(例如：servCellIndex)或辅小区索引值(例如：sCellIndex)或物理小区标识(例如：PCI))，得到终端设备发送确认消息的目标小区，即：进行小区切换的目标小区。
可选地，根据在待添加和修改的L1/L2候选信息元素配置的所有候选小区中定义候选小区索引值标识，包括：在MAC CE中增加一个L1/L2候选索引值字段，该L1/L2候选索引值字段用于指示一个待添加和修改的L1/L2候选信息元素的L1/L2候选索引值参数(例如：candidates-L1L2-Id-r18)。网络设备根据该L1/L2候选索引值字段的取值从待添加和修改的L1/L2候选列表信息元素中选择或确定一个待添加和修改的L1/L2候选信息元素，即：L1/L2候选索引值字段的取值与该待添加和修改的L1/L2候选信息元素的L1/L2候选索引值参数(例如：candidates-L1L2-Id-r18)的取值相同，并根据该待添加和修改的L1/L2候选信息元素得到对应的小区组配置信息元素。和/或，在MAC CE中增加一个候选小区索引值字段，该候选小区索引值字段用于指示一个候选小区的候选小区索引值参数(例如：candidateCellIndex)。网络设备根据候选小区索引值字段的取值从选择或确定的待添加和修改的L1/L2候选信息元素中配置的所有候选小区中选择或确定一个候选小区，即：候选小区索引值字段的取值与该候选小区对应的特殊小区配置信息元素或辅小区配置信息元素包含的候选小区索引值参数(例如：candidateCellIndex)的取值相同，该候选小区也称为目标小区，网络设备根据候选小区索引值可以得到目标小区的小区索引值(例如：服务小区索引值(例如：servCellIndex)或辅小区索引值(例如：sCellIndex)或物理小区标识(例如：PCI))，得到终端设备发送确认消息的目标小区，即：进行小区切换的目标小区。
可选地，根据小区组配置信息元素中增加的小区索引值列表参数和候选小区索引值列表参数标识，包括：在MAC CE中增加一个L1/L2候选索引值字段，该L1/L2候选索引值字段用于指示一个待添加和修改的L1/L2候选信息元素的L1/L2候选索引值参数(例如：candidates-L1L2-Id-r18)。网络设备根据该L1/L2候选索引值字段的取值从待添加和修改的L1/L2候选列表信息元素中选择或确定一个待添加和修改的L1/L2候选信息元素，即：L1/L2候选索引值字段的取值与该选择或确定的待添加和修改的L1/L2候选信息元素的L1/L2候选索引值参数(例如：candidates-L1L2-Id-r18)的取值相同，并根据该待添加和修改的L1/L2候选信息元素得到对应的小区组配置信息元素。和/或，在MAC CE中增加一个候选小区索引值字段，该候选小区索引值字段用于指示一个候选小区的候选小区索引值，即：该候选小区索引值对应于候选小区索引值列表(例如：candidateCellIndexList)的一个取值。基于小区索引值列表和候选小区索引值列表选取或确定候选小区的候选小区索引值与小区索引值的对应关系。根据候选小区索引值字段的取值以及候选小区的候选小区索引值与小区索引值的对应关系得到该候选小区的小区索引值(例如：服务小区索引值(例如：servCellIndex)或辅小区索引值(例如：sCellIndex)或物理小区标识(例如：PCI))，该候选小区也称为目标小区，网络设备得到终端设备发送确认消息的目标小区，即：进行小区切换的目标小区。
本实施例通过上述方案，具体通过在确认消息中增加字段表示一个L1/L2候选索引值和/或候选小区索引值，以供网络设备从确认消息中获取终端设备进行小区切换的目标小区。
第七实施例
参照图10，图10为根据第七实施例示出的小区切换方法的流程示意图，小区切换方法可应用于网络设备(如：基站)，包括以下步骤：
S1：发送下行信息，以使终端设备基于下行信息进行小区切换。
可选地，下行信息包括以下至少一项：无线资源控制信令、下行控制信息、随机接入响应和/或小区切换命令。
可选地，所述无线资源控制信令包括候选小区配置和/或指示信息参数。
可选地，所述候选小区配置包括候选小区索引值、L1/L2候选索引值、候选小区索引值列表及小区索引值列表中的至少一项。
可选地，网络设备还用于接收物理随机接入信道和/或确认消息。
可选地，发送无线资源控制信令的步骤之前，还包括以下至少一项：在特殊小区配置信息元素和/或辅小区配置信息元素中增加候选小区索引值参数、在小区组配置信息元素中配置小区索引值列表参数和/或候选小区索引值列表参数、在无线资源控制信令中增加指示信息参数。
可选地，发送下行控制信息的步骤之前，还包括：在下行控制信息中增加源小区判定字段、指示信息字段、L1/L2候选索引值字段、候选小区索引值字段中的至少一项。
可选地，在发送的无线资源控制信令中增加候选小区索引值参数，包括在待添加和修改的L1/L2候选列表信息元素配置的所有候选小区中定义候选小区索引值、在待添加和修改的L1/L2候选信息元素配置的所有候选小区中定义候选小区索引值和/或在小区组配置信息元素中增加小区索引值列表参数和候选小区索引值列表参数中的至少一项。
可选地，在特殊小区配置(例如：SpCellConfig)信息元素中增加候选小区索引值参数(例如： candidateCellIndex)用于在层1/层2(例如：L1/L2)信息传输中标识该特殊小区，和/或，如果小区组配置信息元素(例如：CellGroupConfig)配置了辅小区配置(例如：SCellConfig)信息元素，则在辅小区配置信息元素中增加候选小区索引值参数(例如：candidateCellIndex)用于在L1/L2信息传输中标识该辅小区。
可选地，在待添加和修改的L1/L2候选列表信息元素配置的所有候选小区中定义候选小区索引值，表示候选小区索引值参数(例如：candidateCellIndex)在待添加和修改的L1/L2候选列表信息元素配置的所有候选小区中统一编号。待添加和修改的L1/L2候选列表信息元素配置的所有候选小区是指待添加和修改的L1/L2候选列表信息元素配置的所有待添加和修改的L1/L2候选信息元素配置的候选小区，即：所有待添加和修改的L1/L2候选信息元素包含的L1/L2候选小区配置参数对应的小区组配置信息元素配置的候选小区。可选地，参数maxNrofCandidateCells是待添加和修改的L1/L2候选列表信息元素配置的最大候选小区个数。
可选地，在特殊小区配置信息元素中增加候选小区索引值参数(例如：candidateCellIndex)用于在L1/L2信息传输中标识该特殊小区，和/或，如果小区组配置信息元素配置了辅小区配置信息元素，则在辅小区配置信息元素中增加候选小区索引值参数用于在L1/L2信息传输中标识该辅小区。
可选地，在待添加和修改的L1/L2候选信息元素配置的所有候选小区中定义候选小区索引值，表示候选小区索引值参数(例如：candidateCellIndex)在当前待添加和修改的L1/L2候选信息元素配置的所有的候选小区中编号。待添加和修改的L1/L2候选信息元素配置的所有的候选小区是指待添加和修改的L1/L2候选信息元素包含的L1/L2候选小区配置参数对应的小区组配置信息元素配置的所有候选小区。
可选地，使用L1/L2候选索引值参数(例如：candidates-L1L2-Id-r18)和/或候选小区索引值参数就能唯一地标识当前待添加和修改的L1/L2候选信息元素中配置的一个候选小区。
可选地，候选小区索引值参数(例如：CandidateCellIndex)的取值从0到(maxNrofCandidateCellsPerCellConfig-1)，可选地，参数maxNrofCandidateCellsPerCellConfig是待添加和修改的L1/L2候选信息元素中配置的最大候选小区数。
可选地，候选小区索引值参数(例如：CandidateCellIndex)的取值从1到maxNrofCandidateCellsPerCellConfig。
可选地，小区组配置信息元素(例如：CellGroupConfig)中可以包括特殊小区和辅小区，可选地，当配置载波聚合和/或双链接场景时，该小区组配置信息元素包含一个或多个辅小区。如果在小区组配置信息元素中增加小区索引值列表参数(例如：cellIndexList)和候选小区索引值列表参数(例如：candidateCellIndexList)，则可以通过候选小区索引值列表与小区索引值列表(例如：cellIndexList)得到候选小区的候选小区索引值与小区索引值的对应关系，从而根据候选小区的候选小区索引值得到候选小区的小区索引值。可选地，小区索引值列表中每个元素是小区索引值，如果是特殊小区，这个小区索引值是特殊小区的服务小区索引值(例如：servCellIndex)或物理小区标识(例如：PCI)；如果是辅小区，这个小区索引值是辅小区的辅小区索引值(例如：sCellIndex)或物理小区标识(例如：PCI)。候选小区索引值列表中每个元素是小区组配置信息元素包含的候选小区对应的候选小区索引值，即：每个候选小区配置一个候选小区索引值，用于在L1/L2信息传输中标识该候选小区。从而，可以使用L1/L2候选索引值参数(例如：candidates-L1L2-Id-r18)、候选小区索引值、候选小区索引值列表以及小区索引值列表等至少一项就能唯一地标识当前待添加和修改的L1/L2候选信息元素中配置的一个候选小区。
可选地，对于候选小区索引值列表与小区索引值列表的对应关系，这两个列表中元素个数相同，并且按照列表中元素顺序，两个列表中元素有一一对应关系。基于小区索引值列表和候选小区索引值列表选取或确定候选小区的候选小区索引值与小区索引值的对应关系。例如：候选小区索引值列表中第一个候选小区索引值对应于小区索引值列表中第一个小区索引值，候选小区索引值列表中第二个候选小区索引值对应于小区索引值列表中第二个小区索引值，以此类推。可选地，如果小区组配置信息元素只包含一个小区，候选小区索引值列表与小区索引值列表的第一个元素对应于该小区，根据候选小区索引值列表中第一个候选小区索引值从小区索引值列表中得到该小区索引值；如果小区组配置信息元素包含多个小区，候选小区索引值列表与小区索引值列表的第一个元素对应于特殊小区，根据候选小区索引值列表中第一个候选小区索引值从小区索引值列表中得到特殊小区的小区索引值(例如：servCellIndex或PCI)，候选小区索引值列表与小区索引值列表的从第二个元素开始对应于辅小区，根据类似的对应关系得到辅小区的的小区索引值(例如：sCellIndex或PCI)。
本实施例通过上述方案，具体通过发送下行信息，以使终端基于下行信息进行小区切换，在特殊小区配置信息元素和/或辅小区配置信息元素中增加候选小区索引值参数、配置小区索引值列表参数和/或候选小区索引值列表参数、在无线资源控制信令中增加指示信息参数；在下行控制信息中增加源小区判定字段、指示信息字段、L1/L2候选索引值字段、候选小区索引值字段中的至少一项，在无线资源控制信令、下行控制信息、随机接入响应和/或小区切换命令中增加候选小区标识，用于L1和/或L2信令传输，使终端设备能识别进行小区切换的候选小区。
第八实施例
参照图11，图11为根据第八实施例示出的小区切换方法的流程示意图，在本申请上述实施例的基础上，本实施例进一步公开了前述实施例中的小区切换方法。
在本申请实施例中，网络设备(如：基站)发送下行信息至终端设备(如：手机)，以使终端设备(如：手机)基于下行信息进行小区切换。
可选地，网络设备(如：基站)发送的下行信息包括无线资源控制信令、下行控制信息、随机接入 响应和/或小区切换命令中的至少一项。
可选地，所述无线资源控制信令包括候选小区配置和/或指示信息参数；
可选地，所述候选小区配置包括候选小区索引值、L1/L2候选索引值、候选小区索引值列表及小区索引值列表中的至少一项。
可选地，源小区将候选小区配置消息和/或PDCCH order发送至终端设备，触发终端设备向目标小区进行PRACH传输，响应于该PRACH传输，目标小区生成随机接入响应。
可选地，如图11所示，目标小区将该随机接入响应传输给源小区，源小区直接将该随机接入响应传输给终端设备，终端设备通过上行授权信息指示的上行资源使用物理上行共享信道向目标小区发送确认消息，可选地，上行授权信息包含物理上行共享信道频域资源分配、频域跳频标志、物理上行共享信道时域资源分配、物理上行共享信道信道发射功率命令、调制编码方式和信道状态信息请求等至少一个指示信息。
可选地，参照图12，图12为根据第八实施例示出的小区切换方法的另一流程示意图，如图12所示，目标小区将该随机接入响应传输给源小区，源小区将随机接入响应中的上行授权信息通过小区切换命令传输给终端设备，终端设备通过小区切换命令指示的上行资源使用物理上行共享信道向目标小区发送确认消息，和/或，小区切换命令还可以包含传输配置指示(TCI,Transmission Configuration Indication)状态。小区切换命令包含以下至少一项上行资源：物理上行共享信道频域资源分配、频域调频标志、物理上行共享信道时域资源分配、物理上行共享信道发射功率命令、调制编码方式、信道状态信息请求和传输配置指示状态，可选地，上述资源的比特数分别是14比特、1比特、4比特、3比特、4比特、1比特和7比特。可选地，传输配置指示状态类型是下行/上行联合TCI模式，即：RRC参数unifiedTCI-StateType配置为joint。
可选地，终端设备通过上述两种方式得到的上行资源使用物理上行共享信道向目标小区发送确认消息，目标小区的标识可以与PDCCH order和/或小区切换命令指示的候选小区相同。
可选地，网络设备可以指示终端设备，传输确认消息的上行资源可以通过以下方式中至少一种获得：(1)直接通过随机接入响应中上行授权信息提供，(2)通过小区切换命令提供。
可选地，通过物理下行控制信道命令(例如：DCI 1_0)和/或RRC参数指示，例如：在下行控制信息(例如：DCI格式1_0)中增加一个指示信息字段，或使用下行控制信息(例如：DCI格式1_0)中的保留比特作为指示信息字段，可选地，这两种方法得到的指示信息字段的位宽都是1比特，该指示信息字段用于指示终端设备，传输确认消息的上行资源通过随机接入响应中上行授权信息提供或者小区切换命令提供。
可选地，如果该字段取值为1表示通过随机接入响应中上行授权信息提供，如果该字段取值为0表示通过小区切换命令提供，反之亦然。终端设备根据指示信息字段的取值从随机接入响应和/或小区切换命令中选取或确定上行资源指示信息用于传输确认消息。
可选地，在RRC中增加一个指示信息参数，如果该参数使能或取值为1，表示通过随机接入响应中上行授权信息提供，和/或，如果该参数不使能或取值为0，表示通过小区切换命令提供，反之亦然。终端设备根据指示信息参数的取值从随机接入响应和/或小区切换命令中选取或确定上行资源指示信息用于传输确认消息。
本实施例通过上述方案，具体通过网络设备发送下行信息至终端设备，以使终端设备基于下行信息进行小区切换，在无线资源控制信令、下行控制信息、随机接入响应和/或小区切换命令中增加候选小区标识，用于L1和/或L2信令传输，使终端设备能识别进行小区切换的目标小区，确定或生成确认消息，网络设备从确认消息中获取终端设备进行小区切换的目标小区。
请参见图13，图13为本申请实施例提供的小区切换装置的结构示意图一，该装置可搭载在或就是通信设备，该通信设备具体可以是终端设备或网络设备。图13所示的小区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13所示，该小区切换装置110包括：
切换模块111，用于基于无线资源控制信令、下行控制信息、随机接入响应及小区切换命令中的至少一项进行小区切换。
可选地，所述装置还包括以下至少一项：
所述无线资源控制信令包括候选小区配置和/或指示信息参数；
所述下行控制信息包括源小区判定字段、指示信息字段、层1/层2候选索引值、候选小区索引值中的至少一项。
可选地，所述候选小区配置包括候选小区索引值、层1/层2候选索引值、候选小区索引值列表及小区索引值列表中的至少一项。
可选地，所述装置还包括以下至少一项：
基于下行控制信息传输物理随机接入信道，接收随机接入响应和/或小区切换命令；
基于所述随机接入响应和/或小区切换命令选取或确定上行资源指示信息；
根据下行控制信息和/或小区切换命令选取或确定目标小区；
确定或生成确认消息，并基于上行资源指示信息将确认消息发送至目标小区。
可选地，所述装置还包括以下至少一项：基于无线资源控制信令从特殊小区配置信息元素和/或辅小区配置信息元素中选取或确定候选小区的候选小区索引值；
基于小区索引值列表和候选小区索引值列表选取或确定候选小区的候选小区索引值与小区索引值的对应关系。
可选地，所述基于下行控制信息传输物理随机接入信道，包括以下至少一项：
根据源小区判定字段的取值、层1/层2候选索引值及候选小区索引值中的至少一项，向对应小区进行物理随机接入信道传输；
根据源小区判定字段的取值、层1/层2候选索引值、候选小区索引值、候选小区索引值列表以及小区索引值列表中的至少一项，向对应小区进行物理随机接入信道传输。
可选地，所述装置还包括以下至少一项：
根据所述随机接入响应和/或小区切换命令选取或确定上行资源指示信息；
根据指示信息字段或参数的取值从随机接入响应和/或小区切换命令中选取或确定上行资源指示信息。
可选地，所述装置还包括以下至少一项：
根据下行控制信息中的层1/层2候选索引值、候选小区索引值以及小区组配置信息元素中候选小区索引值列表、小区索引值列表中的至少一项，得到目标小区；
根据小区切换命令中的层1/层2候选索引值、候选小区索引值以及小区组配置信息元素中候选小区索引值列表、小区索引值列表中的至少一项，得到目标小区。
可选地，所述确认消息包括层1/层2候选索引值和/或候选小区索引值。
本申请实施例提供的小区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14，图14为本申请实施例提供的小区切换装置的结构示意图二，如图14所示，该小区切换装置120包括：
发送模块121，用于发送下行信息，以使终端基于下行信息进行小区切换。
可选地，所述方法还包括以下至少一项：下行信息包括以下至少一项：无线资源控制信令、下行控制信息、随机接入响应和/或小区切换命令；
接收物理随机接入信道和/或确认消息。
可选地，所述装置还包括以下至少一项：
发送无线资源控制信令的步骤之前，还包括以下至少一项：在特殊小区配置信息元素和/或辅小区配置信息元素中增加候选小区索引值参数、在小区组配置信息元素中配置小区索引值列表参数和/或候选小区索引值列表参数、在无线资源控制信令中增加指示信息参数；
可选地，所述装置还包括：发送下行控制信息的步骤之前，还包括：在下行控制信息中增加源小区判定字段、指示信息字段、层1/层2候选索引值字段、候选小区索引值字段中的至少一项。
本申请实施例提供的小区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15，图15为本申请实施例提供的通信设备的结构示意图。如图15所示，本实施例所述的通信设备140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140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140可以包括一个或多个处理器141，该处理器141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141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141也可以存有指令143或者数据(例如中间数据)。可选地，指令143可以被处理器141运行，使得通信设备140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140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140中可以包括一个或多个存储器142，其上可以存有指令144，该指令可在处理器141上被运行，使得通信设备140执行上述方法实施例中描述的方法。
可选地，存储器142中也可以是存储有数据。处理器141和存储器142可以单独设置，也可以集成在一起。
可选地，通信设备140还可以包括收发器145和/或天线146。处理器141可以称为处理单元，对通信设备140(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145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140的收发功能。
可选地，若该通信设备140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145接收下行信息；以及，由处理器141基于下行信息进行小区切换。
可选地，处理器141和收发器145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140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145，发送下行信息，以使终端基于下行信息进行小区切换。
可选地，处理器141和收发器145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141和收发器145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141和收发器145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15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，存储器上存储有小区切换程序，小区切换程序被处理器执行时实现上述任一实施例中的小区切换方法的步骤。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，存储介质上存储有小区切换程序，小区切换程序被处理器执行时实现上述任一实施例中的小区切换方法的步骤。
在本申请实施例提供的通信设备和存储介质的实施例中，可以包含任一上述小区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 (12)

  1. 一种小区切换方法，其中，包括步骤：
    S2：基于无线资源控制信令、下行控制信息、随机接入响应及小区切换命令中的至少一项进行小区切换。
  2. 如权利要求1所述的方法，其中，包括以下至少一项：
    所述无线资源控制信令包括候选小区配置和/或指示信息参数；
    所述下行控制信息包括源小区判定字段、指示信息字段、层1/层2候选索引值、候选小区索引值中的至少一项。
  3. 如权利要求2所述的方法，其中，所述候选小区配置包括候选小区索引值、层1/层2候选索引值、候选小区索引值列表及小区索引值列表中的至少一项。
  4. 如权利要求1所述的方法，其中，步骤S2包括步骤：
    S21：基于下行控制信息传输物理随机接入信道，接收随机接入响应和/或小区切换命令；
    S22：基于所述随机接入响应和/或小区切换命令选取或确定上行资源指示信息；
    S23：根据下行控制信息和/或小区切换命令选取或确定目标小区；
    S24：确定或生成确认消息，并基于上行资源指示信息将确认消息发送至目标小区。
  5. 如权利要求4所述的方法，其中，步骤S2还包括以下至少一项：
    基于无线资源控制信令从特殊小区配置信息元素和/或辅小区配置信息元素中选取或确定候选小区的候选小区索引值；
    基于小区索引值列表和候选小区索引值列表选取或确定候选小区的候选小区索引值与小区索引值的对应关系。
  6. 如权利要求4所述的方法，其中，所述确认消息包括层1/层2候选索引值和/或候选小区索引值；和/或，所述基于下行控制信息传输物理随机接入信道，包括以下至少一项：
    根据源小区判定字段的取值、层1/层2候选索引值及候选小区索引值中的至少一项，向对应小区进行物理随机接入信道传输；
    根据源小区判定字段的取值、层1/层2候选索引值、候选小区索引值、候选小区索引值列表以及小区索引值列表中的至少一项，向对应小区进行物理随机接入信道传输。
  7. 如权利要求4所述的方法，其中，所述S22步骤，包括以下至少一项：
    根据所述随机接入响应和/或小区切换命令选取或确定上行资源指示信息；
    根据指示信息字段或参数的取值从随机接入响应和/或小区切换命令中选取或确定上行资源指示信息。
  8. 如权利要求4所述的方法，其中，所述S23步骤，包括以下至少一项：
    根据下行控制信息中的层1/层2候选索引值、候选小区索引值以及小区组配置信息元素中候选小区索引值列表、小区索引值列表中的至少一项，得到目标小区；
    根据小区切换命令中的层1/层2候选索引值、候选小区索引值以及小区组配置信息元素中候选小区索引值列表、小区索引值列表中的至少一项，得到目标小区。
  9. 一种小区切换方法，其中，包括步骤：
    S1：发送下行信息，以使终端设备基于下行信息进行小区切换。
  10. 如权利要求9所述的方法，其中，还包括以下至少一项：
    下行信息包括以下至少一项：无线资源控制信令、下行控制信息、随机接入响应和/或小区切换命令；
    发送下行控制信息的步骤之前，还包括：在下行控制信息中增加源小区判定字段、指示信息字段、层1/层2候选索引值字段、候选小区索引值字段中的至少一项；
    发送无线资源控制信令的步骤之前，还包括以下至少一项：在特殊小区配置信息元素和/或辅小区配置信息元素中增加候选小区索引值参数、在小区组配置信息元素中配置小区索引值列表参数和/或候选小区索引值列表参数、在无线资源控制信令中增加指示信息参数；
    接收物理随机接入信道和/或确认消息。
  11. 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小区切换程序，所述小区切换程序被所述处理器执行时实现如权利要求1或9所述的小区切换方法的步骤。
  12. 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9所述的小区切换方法的步骤。
PCT/CN2023/076233 2023-02-15 2023-02-15 小区切换方法、通信设备及存储介质 WO2024168601A1 (zh)

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