Cell handover method and apparatus, device, and storage medium

Abstract

The present application relates to the field of communications, and discloses a cell handover method and apparatus, a device, and a storage medium. The method is executed by a terminal device. The method comprises: when the terminal device and a first cell satisfy a first condition, sending first information to a network device, and / or executing a handover from a serving cell to the first cell. Because the relationship between a UE and a source cell does not need to be considered, the UE can hand over to a target cell more quickly, so that the UE utilizes the advantages of the target cell on a transmission bandwidth, cell capacity and transmission delay as soon as possible, so as to improve the transmission quality.

Description

Cell switching method, device, equipment and storage medium Technical Field

[0001] The present application relates to the field of communications, and in particular to a cell switching method, apparatus, device, and storage medium. Background Art

[0002] The cell switching process in the related art easily causes the terminal device to switch from the source cell to the target cell too late, which is not conducive to the transmission quality of the terminal device.

[0003] Summary of the Invention

[0004] The present application provides a cell handover method, apparatus, device, and storage medium. The technical solution at least includes:

[0005] According to one aspect of an embodiment of the present application, a cell handover method is provided, the method being performed by a terminal device, the method comprising:

[0006] When the terminal device and the first cell meet the first condition, first information is sent to the network device, and / or switching is performed from the serving cell to the first cell.

[0007] According to another aspect of an embodiment of the present application, a cell handover method is provided, the method being performed by a network device, the method comprising:

[0008] A first condition is configured for a terminal device; wherein the first condition is used to evaluate the terminal device and the first cell.

[0009] According to another aspect of an embodiment of the present application, a cell switching device is provided, the device comprising:

[0010] a sending module, configured to send first information to a network device when the apparatus and the first cell meet a first condition; and / or,

[0011] A processing module is used to perform switching from a serving cell to the first cell when the device and the first cell meet the first condition.

[0012] According to another aspect of an embodiment of the present application, a cell switching device is provided, the device comprising:

[0013] A sending module is used to configure a first condition to a terminal device; wherein the first condition is used to evaluate the terminal device and the first cell.

[0014] According to one aspect of an embodiment of the present application, a communication device is provided, the communication device including:

[0015] processor;

[0016] a receiver and / or transmitter connected to the processor;

[0017] a memory for storing executable instructions for the processor;

[0018] The communication device is used to implement the cell switching method as described above.

[0019] According to one aspect of the present application, a computer-readable storage medium is provided, in which executable instructions are stored. The executable instructions are loaded and executed by the processor to implement the cell switching method as described in the above aspect.

[0020] According to one aspect of the present application, a computer program product is provided, which includes computer instructions, the computer instructions are stored in a computer-readable storage medium, a processor of a computer device reads the computer instructions from the computer-readable storage medium, and the processor executes the computer instructions, so that the computer device executes to implement the cell switching method as described in the above aspect.

[0021] According to one aspect of the present application, a chip is provided, which includes a programmable logic circuit and / or program instructions, and when the chip is running, is used to implement the cell switching method as described in the above aspect.

[0022] According to one aspect of the present application, a computer program is provided, which includes computer instructions. A processor of a computer device executes the computer instructions, so that the computer device executes the cell switching method as described in the above aspect.

[0023] The technical solutions provided by the embodiments of the present application may have the following beneficial effects:

[0024] When the terminal device meets the first condition with the first cell, the terminal device can perform operations related to cell switching without waiting for the preset conditions between the UE and the serving cell to be met, so that the terminal device can switch to the first cell faster and utilize the advantages of the first cell in transmission bandwidth, cell capacity, transmission delay, etc. as soon as possible to improve transmission quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0026] FIG1 shows a schematic diagram of a wireless communication system provided by an exemplary embodiment of the present application;

[0027] FIG2 shows a schematic flow chart of a cell switching method provided by an exemplary embodiment of the present application;

[0028] FIG3 shows a schematic flow chart of a cell switching method provided by an exemplary embodiment of the present application;

[0029] FIG4 shows a schematic flow chart of a cell switching method provided by an exemplary embodiment of the present application;

[0030] FIG5 shows a schematic flow chart of a cell switching method provided by an exemplary embodiment of the present application;

[0031] FIG6 shows a schematic flow chart of a cell switching method provided by an exemplary embodiment of the present application;

[0032] FIG7 shows a schematic flow chart of a cell switching method provided by an exemplary embodiment of the present application;

[0033] FIG8 shows a schematic flow chart of a cell switching method provided by an exemplary embodiment of the present application;

[0034] FIG9 shows a schematic flow chart of a cell switching method provided by an exemplary embodiment of the present application;

[0035] FIG10 is a schematic diagram showing a flow chart of a cell switching method provided by an exemplary embodiment of the present application;

[0036] FIG11 is a schematic diagram showing a flow chart of a cell switching method provided by an exemplary embodiment of the present application;

[0037] FIG12 is a schematic diagram showing a flow chart of a cell switching method provided by an exemplary embodiment of the present application;

[0038] FIG13 shows a structural block diagram of a cell switching device provided by an exemplary embodiment of the present application;

[0039] FIG14 shows a structural block diagram of a cell switching device provided by an exemplary embodiment of the present application;

[0040] FIG15 shows a schematic structural diagram of a communication device provided by an exemplary embodiment of the present application. DETAILED DESCRIPTION

[0041] To make the objectives, technical solutions, and advantages of the present application more clear, the embodiments of the present application will be further described in detail below with reference to the accompanying drawings. Exemplary embodiments will be described in detail herein, with examples shown in the accompanying drawings. When the following description refers to the drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present application. Instead, they are merely examples of devices and methods consistent with certain aspects of the present application, as detailed in the appended claims.

[0042] The terms used in this application are for the purpose of describing specific embodiments only and are not intended to limit this application. As used in this application and the appended claims, the singular forms "a," "an," "the," and "the" are intended to include the plural forms, unless the context clearly indicates otherwise. It should also be understood that the term "and / or" as used herein refers to and encompasses any and all possible combinations of one or more of the associated listed items.

[0043] It should be understood that although the terms first, second, third, etc. may be used in this application to describe various information, such information should not be limited to these terms. These terms are only used to distinguish information of the same type from each other. For example, without departing from the scope of this application, first information may also be referred to as second information, and similarly, second information may also be referred to as first information. Depending on the context, the word "if" as used herein may be interpreted as "at the time of" or "when" or "in response to determining".

[0044] First, the communication technology involved in the embodiments of this application is introduced:

[0045] Non-Terrestrial Network (NTN):

[0046] NTN generally uses satellite communications to provide communications services to terrestrial users. Compared to terrestrial cellular networks, satellite communications offer many unique advantages. First, satellite communications are not restricted by user location. For example, conventional terrestrial communications cannot cover areas such as oceans, high mountains, and deserts where communications equipment cannot be deployed or where there is a sparse population. However, satellite communications, because a single satellite can cover a large area and orbits the Earth, theoretically every corner of the globe can be covered. Second, satellite communications have significant social value. Satellite communications can provide low-cost coverage in remote mountainous areas and poor, underdeveloped countries and regions, enabling people in these areas to enjoy advanced voice communications and mobile internet technologies, helping to narrow the digital divide with developed regions and promoting their development. Third, satellite communications offer long range, and increasing communication distance does not significantly increase communication costs. Finally, satellite communications are highly stable and unaffected by natural disasters.

[0047] Communication satellites are categorized by their orbital altitude into Low-Earth Orbit (LEO), Medium-Earth Orbit (MEO), Geostationary Earth Orbit (GEO), and High Elliptical Orbit (HEO). This article focuses on LEO and GEO.

[0048] 1. LEO: Low Earth Orbit (LEO) satellites have an altitude range of 500 km to 1500 km, with an orbital period of approximately 1.5 to 2 hours. Signal propagation delay for single-hop communication between users is typically less than 20 ms. The maximum satellite visibility time is 20 minutes. Signal propagation distances are short, link loss is minimal, and the transmit power requirements for user terminal devices are low.

[0049] 2. GEO: Geosynchronous Earth Orbit (GEO): Satellites orbit at an altitude of 35,786 km and revolve around the Earth every 24 hours. The signal propagation delay for single-hop communication between users is typically 250 milliseconds.

[0050] In order to ensure satellite coverage and improve the system capacity of the entire satellite communication system, satellites use multiple beams to cover the ground. A satellite can form dozens or even hundreds of beams to cover the ground; a satellite beam can cover a ground area with a diameter of tens to hundreds of kilometers.

[0051] Measurement:

[0052] Measurement primarily refers to the mobility measurement of a connected user equipment (UE). After the network device issues a measurement configuration to the UE, the UE detects the signal quality status of neighboring cells based on the measurement object, reporting configuration, and other parameters indicated in the measurement configuration. The UE then feeds back the measurement reporting information to the network device for use in cell handovers or to improve the neighbor cell relationship list.

[0053] 1. Measurement configuration

[0054] Typically, a network device sends measurement configuration information to a connected UE via Radio Resource Control (RRC) signaling. The UE performs measurements based on the measurement configuration information (including one or more of intra-frequency, inter-frequency, and inter-technology measurements) and then reports the measurement results to the network device.

[0055] Intra-frequency measurement means that the frequency of the neighboring cell measured by the UE is the same as the frequency of the UE's serving cell, and inter-frequency measurement means that the frequency of the neighboring cell measured by the UE is different from the frequency of the UE's serving cell.

[0056] Inter-technology measurement, or inter-system measurement, means that the communication system of the neighboring cell measured by the UE is different from the communication system of the serving cell of the UE. For example, the serving cell belongs to the Long Term Evolution (LTE) system, and the neighboring cell belongs to the New Radio (NR) system. For another example, the serving cell belongs to the Beyond Fifth Generation (B5G) mobile communication system, and the neighboring cell belongs to the 5G system. It should be understood that the examples here are only for schematically illustrating the meaning of inter-technology measurement, and do not mean to limit the communication systems of the serving cell and the neighboring cell.

[0057] The network device may use RRC connection reconfiguration to perform measurement configuration, which may include one or more of the following information:

[0058] 1) Measurement Object

[0059] For both intra-frequency and inter-frequency measurements, each measurement object indicates the time-frequency position and reference signal (RS) subcarrier spacing to be measured. For the cell associated with that measurement object, the network device may configure one or more of the following: a cell offset list, a blacklist of cells, and a whitelist of cells.

[0060] For cross-technology measurements, each measurement object corresponds to a single Evolved Universal Terrestrial Radio Access (E-UTRA) frequency. For cells associated with that E-UTRA frequency, the network device may configure one or more of the following: a cell offset list, a blacklist of cells, and a whitelist of cells.

[0061] During the event evaluation and measurement reporting process, the UE does not perform any operations on cells in the blacklist. The UE performs event evaluation and measurement reporting on cells in the whitelist.

[0062] 2) Reporting Configuration

[0063] Each measurement object corresponds to one or more reporting configurations. A reporting configuration includes one or more of the following: reporting criteria, RS type, and reporting format.

[0064] The reporting criterion, that is, the triggering condition for the UE to perform measurement reporting, may be periodically triggered reporting or event-triggered reporting.

[0065] The RS type refers to the type of RS used by the UE for beam and cell measurement, such as the Synchronization Signal and PBCH Block (SS / PBCH Block, SSB), Channel State Information Reference Signal (CSI-RS), etc.

[0066] The reporting format includes the UE's measurement reporting quantity for each cell and each beam, and also includes other relevant information, such as the maximum number of cells reported by the UE and the maximum number of beams reported for each cell. The measurement reporting quantity may be at least one of Reference Signal Received Power (RSRP), Received Signal Strength Indicator (RSSI), Reference Signal Received Quality (RSRQ), Signal to Interference Noise Ratio (SINR), etc.

[0067] Measurement events generally include one or more of the following:

[0068] A1 event: the signal quality of the serving cell is higher than a threshold;

[0069] A2 event: the signal quality of the serving cell is lower than a threshold;

[0070] Event A3: The signal quality of the neighboring cell exceeds a threshold compared to the signal quality of the special cell (SpCell), where the SpCell includes the primary cell (PCell) and the primary secondary cell (PSCell).

[0071] A4 event: the signal quality of the neighboring cell exceeds a threshold;

[0072] A5 event: The signal quality of the SpCell is lower than a threshold 1, and the signal quality of the neighboring cell is higher than a threshold 2;

[0073] A6 event: The signal quality of the neighboring cell is higher than the signal quality of the secondary cell (SCell) by a threshold;

[0074] B1 event: The signal quality of a cross-technology neighboring cell exceeds a threshold, where a cross-technology neighboring cell refers to a neighboring cell that belongs to a different communication system than the serving cell.

[0075] Event B2: The signal quality of the PCell falls below a threshold of 3, and the signal quality of the neighboring cell with a different technology exceeds a threshold of 4.

[0076] D1 event: The distance between the UE and reference point 1 is higher than threshold 5, and the distance between the UE and reference point 2 is lower than threshold 6.

[0077] 3) Measurement Identity

[0078] A measurement identifier corresponds to a measurement object and a reporting configuration. By associating the measurement identifier with the measurement object and reporting configuration, the corresponding relationship between the measurement object and the reporting configuration can be implicitly reflected. For example, a measurement object can correspond to multiple reporting configurations at the same time, and / or a reporting configuration can correspond to multiple measurement objects at the same time.

[0079] 4) Measurement Gap

[0080] A measurement gap is a period during which the UE does not need to transmit or receive signals to or from the serving cell. The measurement gap may reflect the period during which the UE performs measurements.

[0081] 2. Measurement reporting

[0082] The UE performs measurements according to the measurement configuration sent by the network device and evaluates the measurement report based on the measurement results. If the reporting conditions are met, the UE will fill in the measurement report and include the measurement results in the measurement report and send it to the network device.

[0083] Measurement reporting can be divided into at least three categories:

[0084] 1) Event triggering

[0085] When the entry conditions of the measurement event configured by the network device are met and persist for a period of time, the sending of the measurement report is triggered. The measurement process ends after the measurement report is sent once. The reporting configuration of the measurement report corresponding to the event triggering includes at least one of the following:

[0086] Trigger type measurement events and their threshold parameters. Measurement events include one or more of A1 events, A2 events, A3 events, A4 events, A5 events, A6 events, B1 events, and B2 events.

[0087] The number of measurement reports to be submitted is set to 1.

[0088] The configured reporting interval is invalid, that is, the UE ignores the configured reporting interval regardless of its value.

[0089] 2) Periodic reporting

[0090] After the network device performs measurement configuration, the UE measures the corresponding frequency points according to the information included in the measurement configuration and sends a measurement report according to the reporting period and reporting interval.

[0091] 3) Periodic reporting triggered by events

[0092] When the entry conditions of the measurement event configured by the network device are met and persist for a period of time, the reporting of the measurement report is triggered. After the report is triggered, the timer between multiple measurements and the counter for the number of measurements will be started until the number of reports reaches the requirements configured by the network device, and the current measurement process ends. The reporting configuration of the measurement report corresponding to the periodic reporting triggered by the event includes at least one of the following:

[0093] Trigger type measurement events and their threshold parameters. Measurement events include one or more of A1, A2, A3, A4, and A5 events.

[0094] The number of measurement report reports, which can be greater than 1;

[0095] The configured reporting interval is effective. Set the reporting cycle timer according to the configured reporting interval parameters.

[0096] 3. Conditional Handover (CHO)

[0097] CHO means that the UE (autonomously) performs a handover when one or more handover execution conditions are met. The UE begins evaluating the execution conditions after receiving the CHO configuration and stops evaluating the execution conditions after performing a handover (including legacy handover or CHO). CHO is performed based on the CHO configuration information. CHO is applied according to the following principles:

[0098] The candidate cell and / or potential target cell provide CHO configuration for the UE;

[0099] The source cell provides the UE with CHO execution conditions;

[0100] A CHO execution condition may contain one or two trigger conditions.

[0101] When performing a cell handover based on the above measurement configuration, the terminal device needs to consider both the distance or signal quality between itself and the source cell, as well as the distance or signal quality between itself and the candidate cells. Therefore, the terminal device must wait until the preset conditions between itself and the source cell and between itself and the candidate cells are met before performing handover-related operations.

[0102] Taking the cell switching scenario related to NTN cells as an example, if cell switching is performed based on the above measurement configuration, the terminal device will switch to the target cell too late, causing the terminal device to stay in an inappropriate service cell for too long, which is not conducive to the transmission quality of the terminal device.

[0103] For example, in a cell handover scenario involving an NTN cell, event handover can be performed using measurement reporting based on event D1 (event D1), or CHO can be performed using measurement reporting based on conditional event D1 (condEventD1). Event D1 and conditional event D1 require the UE to evaluate the distance between itself and the serving cell (NTN cell), as well as the distance between itself and the neighboring cell. An NTN cell refers to a cell in an NTN system, and a TN cell refers to a cell in a TN system.

[0104] Taking conditional event D1 as an example, CHO is executed only when the distance between the UE and the neighboring cell is less than threshold 7 and the distance between the UE and the NTN cell is greater than threshold 8. In other words, when the distance between the UE and the neighboring cell is less than threshold 7, CHO is triggered only when the UE is sufficiently far away from the reference point of the NTN cell (i.e., the distance between the UE and the NTN cell is greater than threshold 8). If the neighboring cells include NTN cells or TN cells with better signal quality, then the UE should actually switch to other cells as soon as possible, rather than having to wait until the distance between the UE and the NTN cell meets the conditions before performing cell switching. In particular, in scenarios where the TN cell is within the coverage area of ​​the NTN cell, event D1 and conditional event D1 are more likely to cause the UE to switch to the TN cell too late.

[0105] Therefore, the design that the UE can only switch from the source cell to the target cell when the distance between the UE and the source cell and the distance between the UE and the neighboring cell meet the requirements may easily cause the UE to switch to the target cell too late, which will have an adverse impact on the transmission quality of the UE.

[0106] Based on the above problems, the present application provides a cell switching method, apparatus, device and storage medium to support UE to perform cell switching as early as possible and improve the transmission quality of UE.

[0107] In the embodiment of the present application, the source cell is also referred to as the serving cell. The candidate cells include neighboring cells, and the candidate cells can also be referred to as potential target cells.

[0108] Figure 1 shows a schematic diagram of a wireless communication system provided by an exemplary embodiment of the present application. The wireless communication system includes a network device 110 and a terminal device 120, which is not limited in the present application.

[0109] The network device 110 in the present application provides wireless communication functions, and the network device 110 includes but is not limited to: Evolved Node B (eNB), Radio Network Controller (RNC), Node B (NB), Base Station Controller (BSC), Base Transceiver Station (BTS), Home Base Station (e.g., Home Evolved Node B, or Home Node B, HNB), Baseband Unit (BBU), Access Point (AP) in Wireless Fidelity (Wi-Fi) system, Wireless Relay Node, Wireless Backhaul Node, Transmission Point (TP) or Transmission and Reception Point (TRP), etc., and can also be the Next Generation Node B (NGNB) in the 5th Generation (5G) mobile communication system. The invention relates to a base station (gNB) or a transmission point (TRP or TP), or one or a group of antenna panels (including multiple antenna panels) of a base station in a 5G system, or a network node constituting a gNB or a transmission point, such as a baseband unit (BBU) or a distributed unit (DU), or a base station in a Beyond Fifth Generation (B5G) mobile communication system or a sixth generation (6G) mobile communication system, or a core network (CN), fronthaul, backhaul, radio access network (RAN), network slice, or a reader / writer in a radio frequency identification (RFID) system.

[0110] The terminal device 120 in this application is also called user equipment (UE), access terminal, user unit, user station, mobile station, mobile station, remote station, remote terminal, mobile device, user terminal, terminal, wireless communication device, user agent, and user device. The terminals include, but are not limited to, handheld devices, wearable devices, vehicle-mounted devices, and Internet of Things devices, such as electronic tags, controllers, mobile phones, tablet computers, e-book readers, laptop computers, desktop computers, televisions, game consoles, mobile Internet devices (MIDs), augmented reality (AR) terminals, virtual reality (VR) terminals, and mixed reality (MR) terminals, wearable devices, handles, wireless terminals in industrial control, wireless terminals in self-driving, wireless terminals in remote medical care, wireless terminals in smart grids, wireless terminals in transportation safety, wireless terminals in smart cities, wireless terminals in smart homes, wireless terminals in remote medical surgery, cellular phones, cordless phones, session initiation protocol (SIP) phones, wireless local loops (WLANs), and wireless terminals in industrial control. Loop (WLL) stations, personal digital assistants (PDA), TV set-top boxes (STB), customer premises equipment (CPE), etc.

[0111] The network device 110 and the terminal device 120 communicate with each other via some air interface technology, such as a Uu interface.

[0112] Exemplarily, there are two communication scenarios between the network device 110 and the terminal device 120: an uplink communication scenario and a downlink communication scenario. Uplink communication refers to sending signals to the network device 110; downlink communication refers to sending signals to the terminal device 120.

[0113] The technical solutions provided in the embodiments of the present application can be applied to various communication systems, such as: Global System of Mobile communication (GSM) system, Code Division Multiple Access (CDMA) system, Wideband Code Division Multiple Access (WCDMA) system, General Packet Radio Service (GPRS), Long Term Evolution (LTE) system, LTE Frequency Division Duplex (FDD) system, LTE Time Division Duplex (TDD) system, Advanced Long Term Evolution (LTE-A) system, Universal Mobile Telecommunication System (UMTS), Worldwide Interoperability for Microwave Access (WiMAX) communication system, 5G mobile communication system, New Radio (NR) system, NR system evolution system, LTE on unlicensed spectrum (LTE-U) system, NR on unlicensed spectrum (NR-based access to unlicensed spectrum) system. Unlicensed spectrum, NR-U) system, terrestrial communication network (Terrestrial Networks, TN) system, non-terrestrial communication network (Non-Terrestrial Networks, NTN) system, wireless local area network (Wireless Local Area Networks, WLAN), wireless fidelity (Wireless Fidelity, Wi-Fi), cellular Internet of Things system, cellular passive Internet of Things system, can also be applied to the subsequent evolution system of the 5G NR system, and can also be applied to B5G, 6G and subsequent evolution systems. In some embodiments of the present application, "NR" may also be referred to as a 5G NR system or a 5G system. Among them, the 5G mobile communication system may include non-standalone networking (NSA) and / or standalone networking (SA).

[0114] The technical solutions provided in the embodiments of the present application can also be applied to machine type communication (MTC), long term evolution technology for machine-to-machine communication (LTE-M), device-to-device (D2D) network, machine-to-machine (M2M) network, Internet of Things (IoT) network or other networks. Among them, the IoT network can include, for example, the Internet of Vehicles. Among them, the communication mode in the Internet of Vehicles system is collectively referred to as vehicle to other devices (Vehicle to X, V2X, X can represent anything), for example, the V2X can include: vehicle to vehicle (V2V) communication, vehicle to infrastructure (V2I) communication, vehicle to pedestrian communication (V2P) or vehicle to network (V2N) communication, etc.

[0115] The wireless communication system provided in this embodiment can be applied to, but is not limited to, at least one of the following communication scenarios: an uplink communication scenario, a downlink communication scenario, and a sidelink communication scenario.

[0116] FIG2 shows a schematic flow chart of a cell handover method provided by an exemplary embodiment of the present application. The method is executed by a terminal device and includes:

[0117] Step 220: When the terminal device and the first cell meet the first condition, send first information to the network device, and / or perform switching from the serving cell to the first cell.

[0118] The first condition is configured by the network device or agreed upon by the communication protocol.

[0119] In some embodiments, the first condition is related to a neighboring cell or a candidate cell of the terminal device, and it can also be understood that the first condition is used to evaluate a measurement reporting condition associated with the terminal device and a neighboring cell or a handover condition associated with the terminal device and a candidate cell. The neighboring cell or candidate cell of the terminal device includes the first cell.

[0120] In some embodiments, the first cell may be referred to as a target cell, and the serving cell may be referred to as a source cell.

[0121] In some embodiments, the first condition includes at least one of the following: the distance between the terminal device and the first cell is less than a first threshold; the distance between the terminal device and the first cell is equal to the first threshold; the terminal device enters the coverage range of the first cell.

[0122] In some embodiments, the first condition includes: the distance between the terminal device and the first cell is less than a first threshold, and / or the terminal device enters the coverage range of the first cell.

[0123] In some embodiments, the first condition includes: the distance between the terminal device and the first cell is equal to a first threshold, and / or the terminal device enters the coverage range of the first cell.

[0124] In some embodiments, the network device includes a network device corresponding to a serving cell of the terminal device. Optionally, the network device includes one or more of a satellite, an access network device, and an NTN gateway.

[0125] To sum up, the method provided in the embodiment of the present application is that the terminal device can perform operations related to cell switching when the first condition is met with the first cell, without waiting for the preset conditions between the UE and the serving cell to be met, so that the terminal device can switch to the first cell faster and utilize the advantages of the first cell in transmission bandwidth, cell capacity, transmission delay, etc. as soon as possible to improve transmission quality.

[0126] In some embodiments, the first condition includes that the distance between the terminal device and the first cell is less than or equal to a first threshold, and step 220 can be implemented as step 320. Optionally, the cell switching method may further include step 340 and / or step 360, as shown in Figure 3. Figure 3 shows a flow chart of a cell switching method provided by an exemplary embodiment of the present application, which is executed by a terminal device and includes at least some of the following steps:

[0127] Step 320: When the distance between the terminal device and the first cell is less than or equal to the first threshold, send a measurement report to the network device;

[0128] The measurement report is used to indicate that the distance between the terminal device and the first cell is less than or equal to a first threshold. The first information includes the measurement report.

[0129] In some embodiments, the measurement report further includes measurement results of the serving cell and / or measurement results of the first cell.

[0130] Optionally, the first threshold is configured by the network device, or agreed upon by the communication protocol, or determined by the terminal device based on the configuration of the network device, or determined by the terminal device based on the communication protocol.

[0131] In some embodiments, the terminal device receives a measurement configuration sent by the network device before executing step 320. The measurement configuration includes at least one of the measurement object, reporting configuration, measurement identifier, and measurement interval mentioned above.

[0132] In some embodiments, the terminal device evaluates whether the terminal device and the first cell meet the first condition based on the measurement configuration sent by the network device.

[0133] In some embodiments, if the first condition is continuously met, the terminal device sends a measurement report to the network device. That is, if the distance between the terminal device and the first cell remains less than or equal to the first threshold within the first time period, the terminal device sends the measurement report to the network device. Optionally, the first time period is determined based on a measurement configuration.

[0134] In some embodiments, when the distance between the terminal device and the first cell is less than or equal to a first threshold, the terminal device adds a first measurement report entry to the measurement report list variable.

[0135] In some embodiments, the first measurement report entry is associated with a situation where the distance between the terminal device and the first cell is less than or equal to a first threshold.

[0136] In some embodiments, the first measurement report entry is associated with a measurement report indicating that the distance between the terminal device and the first cell is less than or equal to a first threshold.

[0137] Step 340: Receive second indication information sent by the network device;

[0138] The second indication information is used to instruct the terminal device to switch from the serving cell to the first cell.

[0139] In some embodiments, the second indication information is determined by the network device based at least on a measurement report sent by the terminal device.

[0140] Step 360: Switch from the serving cell to the first cell based on the second indication information.

[0141] In some embodiments, the first condition is a trigger event, and the trigger event is used to trigger the terminal device to send a measurement report to the network device. It can also be understood that the terminal device sends the measurement report to the network device based on an event of event trigger type.

[0142] In some embodiments, the handover from the serving cell to the first cell is an event-triggered cell handover.

[0143] In some embodiments, when the terminal device and the first cell meet a second condition, the terminal device performs the first step. Optionally, the second condition is a trigger event.

[0144] In some embodiments, the first step includes at least one of the following:

[0145] Delete the first measurement report entry in the measurement report list variable;

[0146] not sending the first information to the network device;

[0147] Not performing handover from the serving cell to the first cell;

[0148] Sending second information to the network device, where the second information is used to indicate that the terminal device meets the second condition;

[0149] Sending second information to the network device, where the second information is used to indicate that the terminal device does not meet the first condition.

[0150] In some embodiments, when the terminal device and the first cell meet the second condition, the terminal device considers that itself and the first cell do not meet the first condition and deletes the first measurement report entry from the measurement report list.

[0151] In some embodiments, the network device further sends a leaving reporting configuration (such as reportOnLeave) to the terminal device. If the value of the leaving reporting configuration is a first value (such as a value of "1" or "0" or "True"), then when the terminal device and the first cell meet the second condition, the terminal device sends a second message. The second information is used to indicate that the terminal device meets the second condition and / or the terminal device does not meet the first condition.

[0152] In some embodiments, the second condition includes a distance between the terminal device and the first cell being greater than or equal to a second threshold. Optionally, the second threshold is configured by the network device, or agreed upon by the communication protocol, or determined by the terminal device based on the configuration of the network device, or determined by the terminal device based on the communication protocol.

[0153] In some embodiments, if the second condition is continuously met, the terminal device performs the first step. That is, if the distance between the terminal device and the first cell is greater than or equal to the second threshold within the second time period, the terminal device performs the first step. Optionally, the second time period is determined based on the measurement configuration. Optionally, the second time period is the same as or different from the first time period.

[0154] In some embodiments, the first condition and the second condition both belong to triggering events. Optionally, the first condition is an entry condition of the triggering event, and the second condition is an exit condition of the triggering event.

[0155] In some embodiments, the trigger event is configured by the network device or agreed upon by the communication protocol.

[0156] In some embodiments, the configuration information of the triggering event includes at least one of the following:

[0157] Reference location;

[0158] The first parameter value;

[0159] • Third threshold.

[0160] In some embodiments, the first threshold is the third threshold, or the first threshold is the difference between the third threshold and the first parameter value.

[0161] In some embodiments, the second threshold is the third threshold, or the second threshold is the sum of the third threshold and the first parameter value.

[0162] In some embodiments, the distance between the terminal device and the first cell is represented by the distance between the terminal device and a reference position. Optionally, the reference position is located at the center of the first cell, or the reference position is the location of the network device corresponding to the first cell.

[0163] In some embodiments, the reference location is indicated by referenceLocation in the reporting configuration.

[0164] In some embodiments, the first parameter value is indicated by hysteresisLocation in the reporting configuration.

[0165] In some embodiments, the third threshold is indicated by distanceThreshFromReference in the reporting configuration.

[0166] Exemplarily, the reporting configuration is reportConfigNR. In some embodiments, the serving cell and the first cell have the same frequency, or the serving cell and the first cell have different frequencies.

[0167] In some embodiments, the serving cell and the first cell belong to the same communication system, or the serving cell and the first cell belong to different communication systems.

[0168] In some embodiments, the serving cell belongs to a TN system, that is, the serving cell is a TN cell. The first cell may belong to an NTN system or a TN system, that is, the first cell may be an NTN cell or a TN cell.

[0169] In some embodiments, the serving cell belongs to the NTN system, that is, the serving cell is an NTN cell. The first cell may belong to the NTN system or the TN system, that is, the first cell may be an NTN cell or a TN cell.

[0170] In the scenario where the serving cell is an NTN cell and the first cell is a TN cell, compared with the NTN cell, the TN cell has obvious advantages in transmission bandwidth, cell capacity, transmission delay, etc., allowing the terminal device to obtain the improved transmission quality brought by the TN cell as early as possible, which is very beneficial to the communication services of the terminal device.

[0171] In summary, the method provided in the embodiment of the present application is that the terminal device can perform operations related to cell switching when the first condition is satisfied with the first cell, without waiting for the preset conditions to be satisfied between the UE and the serving cell, so that the terminal device can switch to the first cell faster, and take advantage of the first cell's advantages in transmission bandwidth, cell capacity, transmission delay, etc. as early as possible to improve transmission quality. In addition, the first condition is a triggering event, and the switch from the serving cell to the first cell can be considered as an event-triggered cell switch. When the UE is close enough to the first cell, the reporting of the measurement report can be triggered, so that the network device can send the cell switching instruction in time, thereby enabling the UE to switch from the serving cell to the first cell as soon as possible. Therefore, the method provided in the embodiment of the present application not only ensures that the terminal device switches to the first cell as soon as possible, but also ensures the accuracy and rationality of the cell switching by reporting the measurement report.

[0172] In addition, a design is provided to prevent the terminal device from triggering cell switching when the second condition is met, thereby preventing the terminal device from mistakenly switching to an inappropriate candidate cell. By limiting the cell switching conditions of the terminal device, the transmission quality of the terminal device is guaranteed.

[0173] In some embodiments, the first condition includes that the distance between the terminal device and the first cell is less than or equal to a first threshold, and step 220 can be implemented as step 420, as shown in Figure 4. Figure 4 shows a flow chart of a cell handover method provided by an exemplary embodiment of the present application, the method being performed by the terminal device, and the method comprising at least some of the following steps:

[0174] Step 420: When the distance between the terminal device and the first cell is less than or equal to a first threshold, perform CHO from the serving cell to the first cell.

[0175] Optionally, the first threshold is configured by the network device, or agreed upon by the communication protocol, or determined by the terminal device based on the configuration of the network device, or determined by the terminal device based on the communication protocol.

[0176] In some embodiments, if a first condition is continuously met, the terminal device performs a CHO from the serving cell to the first cell. That is, if the distance between the terminal device and the first cell remains less than or equal to a first threshold within a first time period, the terminal device performs a CHO from the serving cell to the first cell. Optionally, the first time period is determined based on a measurement configuration.

[0177] In some embodiments, when the distance between the terminal device and the first cell is less than or equal to a first threshold and a second conditional event is satisfied, CHO is performed from the serving cell to the first cell.

[0178] The second conditional event includes a CHO execution condition corresponding to the first cell except for the first conditional event. Optionally, the second conditional event is configured by a network device or agreed upon by a communication protocol.

[0179] In some embodiments, if the first condition is continuously satisfied and the second condition event is satisfied, the terminal device performs CHO from the serving cell to the first cell. That is, if within the first time period, the distance between the terminal device and the first cell remains less than or equal to the first threshold, and the second condition event is continuously satisfied, the terminal device performs CHO from the serving cell to the first cell. Optionally, the first time period is determined based on the measurement configuration.

[0180] In some embodiments, the first condition belongs to a first condition event, that is, the first condition belongs to a CHO execution condition, and switching from the serving cell to the first cell is CHO.

[0181] It should be noted that, in the embodiment of the present application, the conditional event includes an event for evaluating the CHO execution condition. Alternatively, the conditional event includes an event for evaluating whether to execute the CHO.

[0182] In some embodiments, when the terminal device and the first cell meet the second condition, CHO from the serving cell to the first cell is not performed. Optionally, the second condition is an event of the first condition.

[0183] In some embodiments, the second condition includes a distance between the terminal device and the first cell being greater than or equal to a second threshold. Optionally, the second threshold is configured by the network device, or agreed upon by the communication protocol, or determined by the terminal device based on the configuration of the network device, or determined by the terminal device based on the communication protocol.

[0184] In some embodiments, if the second condition is continuously met, the terminal device does not perform a CHO from the serving cell to the first cell. That is, if the distance between the terminal device and the first cell is greater than or equal to a second threshold within a second time period, the terminal device does not perform a CHO from the serving cell to the first cell. Optionally, the second time period is determined based on a measurement configuration. Optionally, the second time period is the same as or different from the first time period.

[0185] In some embodiments, the first condition and the second condition both belong to a first condition event. Optionally, the first condition is an entry condition of the first condition event, and the second condition is an exit condition of the first condition event.

[0186] In some embodiments, the first conditional event is configured by the network device or agreed upon by a communication protocol.

[0187] In some embodiments, the configuration information of the first conditional event includes at least one of the following:

[0188] Reference location;

[0189] The first parameter value;

[0190] • Third threshold.

[0191] In some embodiments, the first threshold is the third threshold, or the first threshold is the difference between the third threshold and the first parameter value.

[0192] In some embodiments, the second threshold is the third threshold, or the second threshold is the sum of the third threshold and the first parameter value.

[0193] In some embodiments, the distance between the terminal device and the first cell is represented by the distance between the terminal device and a reference position. Optionally, the reference position is located at the center of the first cell, or the reference position is the location of the network device corresponding to the first cell.

[0194] In some embodiments, before executing step 420, the terminal device receives a CHO configuration and / or CHO execution condition sent by a network device. The first condition is a CHO execution condition. Optionally, the network device sending the CHO configuration is the serving cell and / or candidate cell and / or neighboring cell of the terminal device. Optionally, the network device sending the CHO execution condition is the serving cell and / or candidate cell and / or neighboring cell of the terminal device.

[0195] In some embodiments, after receiving the CHO configuration, the terminal device starts to evaluate the execution conditions of the CHO, that is, starts to evaluate whether the terminal device and the first cell meet the first condition.

[0196] In some embodiments, after receiving the CHO configuration, the terminal device starts to evaluate the execution conditions of the CHO, that is, starts to evaluate whether the terminal device and the first cell meet the first condition, and evaluates whether the second condition event is met.

[0197] In some embodiments, the serving cell and the first cell have the same frequency, or the serving cell and the first cell have different frequencies.

[0198] In some embodiments, the serving cell and the first cell belong to the same communication system, or the serving cell and the first cell belong to different communication systems.

[0199] In some embodiments, the serving cell belongs to a TN system, that is, the serving cell is a TN cell. The first cell may belong to an NTN system or a TN system, that is, the first cell may be an NTN cell or a TN cell.

[0200] In some embodiments, the serving cell belongs to the NTN system, that is, the serving cell is an NTN cell. The first cell may belong to the NTN system or the TN system, that is, the first cell may be an NTN cell or a TN cell.

[0201] In the scenario where the serving cell is an NTN cell and the first cell is a TN cell, compared with the NTN cell, the TN cell has obvious advantages in transmission bandwidth, cell capacity, transmission delay, etc., allowing the terminal device to obtain the improved transmission quality brought by the TN cell as early as possible, which is very beneficial to the communication services of the terminal device.

[0202] In summary, the method provided in the embodiment of the present application is that when the terminal device satisfies the first condition with the first cell, the terminal device can perform operations related to cell switching without waiting for the preset conditions to be met between the UE and the serving cell, so that the terminal device can switch to the first cell faster, and utilize the advantages of the first cell in terms of transmission bandwidth, cell capacity, transmission delay, etc. as early as possible to improve the transmission quality. In addition, the first condition belongs to the first condition event, and the switch from the serving cell to the first cell can be considered as a CHO type cell switch. When the UE is close enough to the first cell, the CHO from the serving cell to the first cell can be performed. Therefore, the method provided in the embodiment of the present application not only ensures that the terminal device switches to the first cell as soon as possible, but also improves the simplicity of cell switching and reduces the transmission resource consumption required for indication information and measurement reports. The introduction of the second condition event further ensures the accuracy and rationality of cell switching on the basis of the first condition event.

[0203] In addition, a design is provided to prevent the terminal device from triggering cell switching when the second condition is met, thereby preventing the terminal device from mistakenly switching to an inappropriate candidate cell. By limiting the cell switching conditions of the terminal device, the transmission quality of the terminal device is guaranteed.

[0204] In some embodiments, the first condition includes the terminal device entering the coverage of the first cell, and step 220 can be implemented as step 520. Optionally, the cell switching method may further include step 540 and / or step 560, as shown in Figure 5. Figure 5 shows a flow chart of a cell switching method provided by an exemplary embodiment of the present application, which is executed by a terminal device and includes at least some of the following steps:

[0205] Step 520: When the terminal device enters the coverage of the first cell, send first indication information to the network device;

[0206] The first indication information is used to instruct the terminal device to enter the coverage of the first cell. The first information includes the first indication information.

[0207] In some embodiments, the first indication information is sent via RRC signaling or Media Access Control (MAC) signaling.

[0208] In some embodiments, the first indication information includes a measurement report, or the first indication information includes a proximity indication (Proximit Indication).

[0209] In some embodiments, the terminal device's entry into the coverage of the first cell is determined based on the second information, that is, whether the first condition is met is evaluated by the terminal device based on the second information sent by the network device.

[0210] In some embodiments, the second information is configured by a network device or agreed upon by a communication protocol.

[0211] In some embodiments, the second information includes at least one of the following:

[0212] a measurement result of at least one candidate cell, where the measurement result of the at least one candidate cell is associated with the coverage of the first cell;

[0213] a measurement result of at least one beam, where the measurement result of the at least one beam is associated with the coverage of the first cell;

[0214] Non-cellular wireless information;

[0215] TN cell location information.

[0216] The measurement result of at least one candidate cell is associated with the coverage of the first cell, which can also be understood as determining whether the terminal device has entered the coverage of the first cell based on the measurement result of the at least one candidate cell. The measurement result of at least one beam is associated with the coverage of the first cell, which can also be understood as determining whether the terminal device has entered the coverage of the first cell based on the measurement result of the at least one beam.

[0217] In the present application, the measurement result may be represented by at least one of the following: a reference signal received power (RSRP) value, a reference signal strength indicator (RSSI) value, a reference signal received quality (RSRQ) value, a signal to interference plus noise ratio (SINR) value, a cross link interference (CLI) value, and a channel state information (CSI) value.

[0218] Non-cellular wireless information refers to information carried or indicated by non-cellular wireless signals. Non-cellular wireless signals include at least one of the following: WLAN signals, Wi-Fi signals, Bluetooth signals, and radar signals.

[0219] In some embodiments, the non-cellular wireless information includes at least one of the following information: information carried by WLAN signals; information indicated by WLAN signals; information carried by Wi-Fi signals; information indicated by Wi-Fi signals; information carried by Bluetooth signals; information indicated by Bluetooth signals; information carried by radar signals; information indicated by radar signals.

[0220] In some embodiments, when the terminal device receives or detects non-cellular wireless information, it determines that it has entered the coverage of the first cell. Alternatively, the terminal device determines that it has entered the coverage of the first cell based on the detection result of the non-cellular wireless information.

[0221] The location information of the first cell is used to indicate the coverage of the first cell, the absolute geographic location of the network equipment of the first cell, and the relative geographic location of the network equipment of the first cell. Optionally, the location information of the first cell uses a circle, a square, a hexagon, or a polygon to describe the coverage of the first cell, and uses longitude and latitude or coordinates to describe the center of the first cell. Optionally, the location information of the first cell uses a circle, a square, a hexagon, or a polygon to describe the coverage of the first cell, and uses longitude and latitude or coordinates to describe the location of the network equipment corresponding to the first cell.

[0222] In some embodiments, the terminal device determines whether it has entered the coverage of the first cell based on the location information of the first cell. Optionally, the terminal device determines whether it has entered the coverage of the first cell based on the location information of the first cell and its own location information.

[0223] In some embodiments, the terminal device receives second information sent by the network device before executing step 520. Optionally, the second information is sent via RRC dedicated signaling. Optionally, the network device sending the second information is a serving cell, a candidate cell, or a neighboring cell of the terminal device.

[0224] In some embodiments, if the first condition is continuously met, the terminal device sends first indication information to the network device. That is, if the terminal device remains within the coverage of the first cell during the first time period, or if the terminal device remains within the coverage of the first cell throughout the first time period, the terminal device sends the first indication information to the network device. Optionally, the first time period is determined based on a measurement configuration.

[0225] Step 540: Receive second indication information sent by the network device;

[0226] The second indication information is used to instruct the terminal device to switch from the serving cell to the first cell.

[0227] In some embodiments, the second indication information is determined by the network device based at least on the first indication information.

[0228] Step 560: Switch from the serving cell to the first cell based on the second indication information.

[0229] In some embodiments, the first condition is a trigger event, and the trigger event is used to trigger the terminal device to send the second indication information to the network device. It can also be understood that the terminal device sends the second indication information to the network device based on an event of event trigger type.

[0230] In some embodiments, the handover from the serving cell to the first cell is an event-triggered cell handover.

[0231] In some embodiments, when the terminal device and the first cell meet a second condition, the terminal device performs the second step. Optionally, the second condition is a trigger event.

[0232] In some embodiments, the second step includes at least one of the following:

[0233] not sending the first information to the network device;

[0234] Not performing handover from the serving cell to the first cell;

[0235] Sending second information to the network device, where the second information is used to indicate that the terminal device meets the second condition;

[0236] Sending second information to the network device, where the second information is used to indicate that the terminal device does not meet the first condition.

[0237] In some embodiments, the second condition includes that the terminal device does not enter the coverage of the first cell, or includes that the terminal device does not remain in the coverage of the first cell within the second time period.

[0238] In some embodiments, whether the terminal device has not entered the coverage of the first cell is determined based on the second information, that is, whether the first condition is met is evaluated by the terminal device based on the second information sent by the network device.

[0239] In some embodiments, the first condition and the second condition both belong to triggering events. Optionally, the first condition is an entry condition of the triggering event, and the second condition is an exit condition of the triggering event.

[0240] In some embodiments, the serving cell and the first cell have the same frequency, or the serving cell and the first cell have different frequencies.

[0241] In some embodiments, the serving cell and the first cell belong to the same communication system, or the serving cell and the first cell belong to different communication systems.

[0242] In some embodiments, the serving cell belongs to a TN system, that is, the serving cell is a TN cell. The first cell may belong to an NTN system or a TN system, that is, the first cell may be an NTN cell or a TN cell.

[0243] In some embodiments, the serving cell belongs to the NTN system, that is, the serving cell is an NTN cell. The first cell may belong to the NTN system or the TN system, that is, the first cell may be an NTN cell or a TN cell.

[0244] In the scenario where the serving cell is an NTN cell and the first cell is a TN cell, compared with the NTN cell, the TN cell has obvious advantages in transmission bandwidth, cell capacity, transmission delay, etc., allowing the terminal device to obtain the improved transmission quality brought by the TN cell as early as possible, which is very beneficial to the communication services of the terminal device.

[0245] In summary, the method provided by the embodiment of the present application is that when the terminal device satisfies the first condition with the first cell, the terminal device can perform operations related to cell switching without waiting for the preset conditions to be met between the UE and the serving cell, so that the terminal device can switch to the first cell faster and utilize the advantages of the first cell in terms of transmission bandwidth, cell capacity, transmission delay, etc. as early as possible to improve the transmission quality. In addition, the first condition is a triggering event, and the switch from the serving cell to the first cell can be considered as an event-triggered cell switch. When the UE determines that it has entered the coverage of the first cell based on the first information, the reporting of the first indication information can be triggered, so that the network device can send the cell switching indication in time, thereby enabling the UE to switch from the serving cell to the first cell as soon as possible. Therefore, the method provided by the embodiment of the present application not only ensures that the terminal device switches to the first cell as soon as possible, but also ensures the accuracy and rationality of the cell switching by reporting the first indication information.

[0246] In some embodiments, the first condition includes the terminal device entering the coverage of the first cell, and step 220 can be implemented as step 620, as shown in Figure 6. Figure 6 shows a flow chart of a cell handover method provided by an exemplary embodiment of the present application, which is performed by the terminal device and includes at least some of the following steps:

[0247] Step 620: When the terminal device enters the coverage of the first cell, perform CHO from the serving cell to the first cell.

[0248] In some embodiments, the terminal device's entry into the coverage of the first cell is determined based on the second information, that is, whether the first condition is met is evaluated by the terminal device based on the second information sent by the network device.

[0249] For the relevant content of the second information, please refer to step 520 and will not be repeated here.

[0250] In some embodiments, the terminal device receives second information sent by the network device before executing step 620. Optionally, the second information is sent via RRC dedicated signaling. Optionally, the network device sending the second information is a serving cell or a candidate cell of the terminal device.

[0251] In some embodiments, the first condition belongs to a CHO execution condition, and switching from the serving cell to the first cell is CHO.

[0252] In some embodiments, when the terminal device and the first cell meet the second condition, CHO from the serving cell to the first cell is not performed. Optionally, the second condition is an event of the first condition.

[0253] In some embodiments, the second condition includes that the terminal device does not enter the coverage of the first cell.

[0254] In some embodiments, the first condition and the second condition both belong to a first condition event. Optionally, the first condition is an entry condition of the first condition event, and the second condition is an exit condition of the first condition event.

[0255] In some embodiments, the first conditional event is configured by the network device or agreed upon by a communication protocol.

[0256] It should be noted that, in the embodiment of the present application, a conditional event refers to an event used to evaluate a CHO execution condition, or a conditional event refers to an event used to evaluate whether to execute a CHO.

[0257] In some embodiments, before executing step 620, the terminal device receives a CHO configuration and / or a CHO execution condition sent by a network device. Optionally, the second information relates to the CHO configuration, and / or the first condition relates to the CHO execution condition. Optionally, the network device sending the CHO configuration is the serving cell, candidate cell, and / or neighboring cell of the terminal device. Optionally, the network device sending the CHO execution condition is the serving cell, candidate cell, and / or neighboring cell of the terminal device.

[0258] In some embodiments, after receiving the CHO configuration, the terminal device starts to evaluate the execution conditions of the CHO, that is, starts to evaluate whether the terminal device and the first cell meet the first condition.

[0259] In some embodiments, after receiving the CHO configuration, the terminal device starts to evaluate the execution conditions of the CHO, that is, starts to evaluate whether the terminal device and the first cell meet the first condition, and evaluates whether the second condition event is met.

[0260] In some embodiments, if the first condition is continuously met, the terminal device performs a CHO from the serving cell to the first cell. That is, if the terminal device remains within the coverage of the first cell during a first time period, the terminal device performs a CHO from the serving cell to the first cell. Optionally, the first time period is determined based on a measurement configuration.

[0261] In some embodiments, if the second condition is continuously met, the terminal device does not perform a CHO from the serving cell to the first cell. That is, if the terminal device does not remain within the coverage of the first cell during the second time period, or if the terminal device leaves the coverage of the first cell during the second time period, the terminal device does not perform a CHO from the serving cell to the first cell. Optionally, the second time period is determined based on a measurement configuration. Optionally, the second time period is the same as or different from the first time period.

[0262] In some embodiments, the serving cell and the first cell have the same frequency, or the serving cell and the first cell have different frequencies.

[0263] In some embodiments, the serving cell and the first cell belong to the same communication system, or the serving cell and the first cell belong to different communication systems.

[0264] In some embodiments, the serving cell belongs to a TN system, that is, the serving cell is a TN cell. The first cell may belong to an NTN system or a TN system, that is, the first cell may be an NTN cell or a TN cell.

[0265] In some embodiments, the serving cell belongs to the NTN system, that is, the serving cell is an NTN cell. The first cell may belong to the NTN system or the TN system, that is, the first cell may be an NTN cell or a TN cell.

[0266] In the scenario where the serving cell is an NTN cell and the first cell is a TN cell, compared with the NTN cell, the TN cell has obvious advantages in transmission bandwidth, cell capacity, transmission delay, etc., allowing the terminal device to obtain the improved transmission quality brought by the TN cell as early as possible, which is very beneficial to the communication services of the terminal device.

[0267] In summary, the method provided in the embodiment of the present application is that the terminal device can perform operations related to cell switching when the first condition is satisfied with the first cell, without waiting for the preset conditions to be satisfied between the UE and the serving cell, so that the terminal device can switch to the first cell more quickly, and utilize the advantages of the first cell in terms of transmission bandwidth, cell capacity, transmission delay, etc. as early as possible to improve the transmission quality. In addition, the switching from the serving cell to the first cell can be considered as a CHO type of cell switching. When the UE determines that it has entered the coverage of the first cell based on the first information, the CHO from the serving cell to the first cell can be executed. Therefore, the method provided in the embodiment of the present application not only ensures that the terminal device switches to the first cell as soon as possible, but also improves the simplicity of cell switching and reduces the transmission resource consumption required for indication information and measurement reports.

[0268] In addition, a design is provided to prevent the terminal device from triggering cell switching when the second condition is met, thereby preventing the terminal device from mistakenly switching to an inappropriate candidate cell. By limiting the cell switching conditions of the terminal device, the transmission quality of the terminal device is guaranteed.

[0269] FIG7 shows a flow chart of a cell handover method provided by an exemplary embodiment of the present application. The method is executed by a network device and includes at least some of the following steps:

[0270] Step 720: Configure the first condition to the terminal device.

[0271] In some embodiments, the first condition is used by the terminal device to perform evaluation related to cell switching, including one or more of evaluation of measurement configuration, evaluation of measurement reporting, evaluation of switching conditions, etc.

[0272] In some embodiments, the first condition is used by the terminal device to evaluate candidate cells or neighboring cells, where the candidate cells or neighboring cells include the first cell.

[0273] In some embodiments, the first condition is related to a neighboring cell or a candidate cell of the terminal device, and it can also be understood that the first condition is used to evaluate a measurement reporting condition associated with the terminal device and a neighboring cell, or a handover condition associated with the terminal device and a candidate cell. The neighboring cell or candidate cell of the terminal device includes the first cell.

[0274] In some embodiments, the first condition includes one or more of the following conditions: the distance between the terminal device and the first cell is less than a first threshold; the distance between the terminal device and the first cell is equal to the first threshold; the terminal device enters the coverage range of the first cell.

[0275] In some embodiments, the first cell may be referred to as a target cell, and the serving cell may be referred to as a source cell.

[0276] In some embodiments, the first condition includes: the distance between the terminal device and the first cell is less than a first threshold, and / or the terminal device enters the coverage range of the first cell.

[0277] In some embodiments, the first condition includes: the distance between the terminal device and the first cell is equal to a first threshold, and / or the terminal device enters the coverage range of the first cell.

[0278] In some embodiments, the network device includes a network device corresponding to a serving cell of the terminal device. Optionally, the network device includes one or more of a satellite, an access network device, and an NTN gateway.

[0279] In summary, in the method provided in the embodiment of the present application, the first condition can be used to evaluate the terminal device and the first cell. This allows the terminal device to perform operations related to cell switching when the first condition is satisfied between the terminal device and the first cell, without having to wait for the preset condition between the terminal device and the serving cell to be satisfied. This allows the terminal device to switch to the first cell more quickly, and to utilize the advantages of the first cell in terms of transmission bandwidth, cell capacity, transmission delay, etc. as soon as possible to improve transmission quality.

[0280] In some embodiments, step 720 may be implemented as step 820. Optionally, the cell handover method may further include step 840 and / or step 860, as shown in FIG8 . FIG8 shows a flow chart of a cell handover method provided by an exemplary embodiment of the present application, the method being executed by a network device and including at least some of the following steps:

[0281] Step 820: Configuring the first condition for the terminal device;

[0282] In some embodiments, the first condition includes a distance between the terminal device and the first cell being less than or equal to a first threshold. Optionally, the first threshold is configured by the network device, or agreed upon by a communication protocol, or determined by the terminal device based on a configuration of the network device, or determined by the terminal device based on a communication protocol.

[0283] In some embodiments, the network device sends a measurement configuration to the terminal device, wherein the measurement configuration includes at least one of the measurement object, reporting configuration, measurement identifier, and measurement interval mentioned above.

[0284] In some embodiments, the first condition pertains to a triggering event.

[0285] In some embodiments, when the terminal device and the first cell meet the first condition, a measurement report is sent to the network device.

[0286] In some embodiments, when the terminal device and the first cell meet a first condition within a first time period, a measurement report is sent to the network device.

[0287] In some embodiments, the trigger event is configured by the network device or agreed upon by the communication protocol.

[0288] For details about the triggering event, please refer to step 320 and will not be described in detail here.

[0289] In some embodiments, the first condition belongs to a first condition event, that is, the first condition belongs to a CHO execution condition, and switching from the serving cell to the first cell is CHO.

[0290] In some embodiments, the first conditional event is configured by the network device or agreed upon by a communication protocol.

[0291] For the relevant content of the first conditional event, please refer to the embodiment shown in FIG4 , which will not be described in detail here.

[0292] In some embodiments, when the terminal device and the first cell meet a first condition, switching from the serving cell to the first cell is performed.

[0293] In some embodiments, when the terminal device and the first cell meet a first condition within a first time period, switching from the serving cell to the first cell is performed.

[0294] In some embodiments, the handover from the serving cell to the first cell is an event-triggered cell handover, or the handover from the serving cell to the first cell is a CHO.

[0295] In some embodiments, the network device further configures a second condition for the terminal device.

[0296] In some embodiments, the second condition is used by the terminal device to perform evaluation related to cell switching, including one or more of evaluation of measurement configuration, evaluation of measurement reporting, evaluation of switching conditions, etc.

[0297] In some embodiments, the second condition is used by the terminal device to evaluate candidate cells or neighboring cells, where the candidate cells or neighboring cells include the first cell.

[0298] In some embodiments, the second condition is related to a neighboring cell or a candidate cell of the terminal device, and it can also be understood that the second condition is used to evaluate a handover condition between the terminal device and the neighboring cell or the candidate cell. The neighboring cell or the candidate cell of the terminal device includes the first cell.

[0299] In some embodiments, the second condition includes a distance between the terminal device and the first cell being greater than or equal to a second threshold. Optionally, the second threshold is configured by the network device, or agreed upon by the communication protocol, or determined by the terminal device based on the configuration of the network device, or determined by the terminal device based on the communication protocol.

[0300] In some embodiments, the second condition pertains to a triggering event or a first conditional event.

[0301] In some embodiments, the first condition and the second condition both belong to triggering events. Optionally, the first condition is an entry condition of the triggering event, and the second condition is an exit condition of the triggering event.

[0302] In some embodiments, when the terminal device and the first cell meet the second condition, the terminal device performs the first step or the second step. For details about the first step, refer to step 360, and for details about the second step, refer to step 560, which will not be repeated here.

[0303] In some embodiments, when the terminal device and the first cell meet the second condition within the second time period, no measurement report is sent to the network device.

[0304] In some embodiments, the first condition and the second condition both belong to a first condition event. Optionally, the first condition is an entry condition of the first condition event, and the second condition is an exit condition of the first condition event.

[0305] In some embodiments, when the terminal device and the first cell meet the second condition, switching from the serving cell to the first cell is not performed.

[0306] In some embodiments, when the terminal device and the first cell meet the second condition within the second time period, switching from the serving cell to the first cell is not performed.

[0307] In some embodiments, the second condition includes a distance between the terminal device and the first cell being greater than or equal to a second threshold. Optionally, the second threshold is configured by the network device, or agreed upon by the communication protocol, or determined by the terminal device based on the configuration of the network device, or determined by the terminal device based on the communication protocol.

[0308] In some embodiments, the network device further configures a second conditional event for the terminal device. The second conditional event includes a CHO execution condition corresponding to the first cell except for the first conditional event.

[0309] In some embodiments, the network device sends a CHO configuration and / or a CHO execution condition to the terminal device. The first condition belongs to the CHO execution condition.

[0310] In some embodiments, the network device further configures the terminal device with second information. For details about the second information, please refer to step 520 and will not be described in detail here.

[0311] Step 840: Receive first information sent by the terminal device;

[0312] In some embodiments, the first information includes a measurement report, where the measurement report is used to indicate that the distance between the terminal device and the first cell is less than or equal to a first threshold.

[0313] In some embodiments, the measurement report further includes measurement results of the serving cell and / or measurement results of the first cell.

[0314] Optionally, the first threshold is configured by the network device, or agreed upon by the communication protocol, or determined by the terminal device based on the configuration of the network device, or determined by the terminal device based on the communication protocol.

[0315] In some embodiments, the first information includes first indication information, and the first indication information is used to indicate that the terminal device enters the coverage of the first cell.

[0316] Step 860: Send second indication information to the terminal device, where the second indication information is used to instruct the terminal device to switch from the serving cell to the first cell.

[0317] In some embodiments, the second indication information is determined by the network device based at least on a measurement report.

[0318] In some embodiments, the second indication information is determined by the network device based at least on the first indication information.

[0319] In some embodiments, the serving cell and the first cell have the same frequency, or the serving cell and the first cell have different frequencies.

[0320] In some embodiments, the serving cell and the first cell belong to the same communication system, or the serving cell and the first cell belong to different communication systems.

[0321] In some embodiments, the serving cell belongs to a TN system, that is, the serving cell is a TN cell. The first cell may belong to an NTN system or a TN system, that is, the first cell may be an NTN cell or a TN cell.

[0322] In some embodiments, the serving cell belongs to the NTN system, that is, the serving cell is an NTN cell. The first cell may belong to the NTN system or the TN system, that is, the first cell may be an NTN cell or a TN cell.

[0323] In the scenario where the serving cell is an NTN cell and the first cell is a TN cell, compared with the NTN cell, the TN cell has obvious advantages in transmission bandwidth, cell capacity, transmission delay, etc., allowing the terminal device to obtain the improved transmission quality brought by the TN cell as early as possible, which is very beneficial to the communication services of the terminal device.

[0324] In summary, the method provided in the embodiment of the present application, the first condition can be used to evaluate the terminal device and the first cell. When the terminal device satisfies the first condition with the first cell, it can perform operations related to cell switching without waiting for the preset conditions to be met between the UE and the serving cell, so that the terminal device can switch to the first cell faster and utilize the advantages of the first cell in terms of transmission bandwidth, cell capacity, transmission delay, etc. as early as possible to improve the transmission quality. In addition, the design of the first information and the second indication information is also provided. If the first information and the second indication information are transmitted, the accuracy and rationality of the cell switching can be guaranteed. If the first information and the second indication information are not transmitted, the simplicity of the cell switching can be improved, and the transmission resource consumption required for the indication information and the measurement report can be reduced.

[0325] In addition, a second condition is designed to prevent the terminal device from mistakenly switching to an inappropriate candidate cell. By limiting the cell switching conditions of the terminal device, the transmission quality of the terminal device is guaranteed.

[0326] Regarding the triggering event described in FIG. 3 or FIG. 5 or FIG. 8, a design of the triggering event is provided herein by way of example. Optionally, name the triggering event described in FIG. 3 or FIG. 5 or FIG. 8 as Event D2, or other names used to represent the triggering event, such as Event D3, Event D4, and so on.

[0327] Triggering event (Event D2): The distance from the terminal device to the reference position is less than a threshold.

[0328] The first condition of the triggering event (Event D2) (i.e., the entry condition of the triggering event): Ml + Hys < Thresh. Here, Ml represents the distance between the terminal device and the reference position described above, that is, the distance between the terminal device and the TN cell; Hys represents the first parameter, and the value of the first parameter described above is the value of Hys. The first parameter is also referred to as the hysteresis parameter; Thresh represents the third threshold described above.

[0329] The second condition of the triggering event (Event D2) (i.e., the departure condition of the triggering event): Ml - Hys > Thresh.

[0330] It should be noted that the first condition of the triggering event (Event D2) can also be Ml < Thresh, and the second condition can also be Ml > Thresh. In this application, the first condition is Ml + Hys < Thresh and the second condition is Ml - Hys > Thresh for illustrative purposes.

[0331] Exemplarily, the EventTriggerConfig in ReportConfigNR is extended as follows:

[0332] Next, a cell handover method based on the triggering event (Event D2) is introduced. As shown in FIG. 9, this method is executed by the terminal device and the network device, and this method includes at least some of the following steps:

[0333] Step 901: The network device sends a measurement configuration to the terminal device, which includes the triggering event;

[0334] In the embodiments of this application, take the service cell of the terminal device including the NTN cell and the first cell including the TN cell as an example.

[0335] In some embodiments, the measurement configuration is carried in the RRC reconfiguration information.

[0336] In some embodiments, the measurement configuration includes at least one of the measurement object, reporting configuration, measurement identifier, and measurement interval described above. Among them, a trigger event (Event D2) is configured. Optionally, other measurement events are also included in the measurement configuration. The configuration of Event D2 may include at least one of the following: reference location; first parameter value; third threshold.

[0337] Exemplarily, the reference location is indicated by referenceLocation in reportConfigNR. The reference location may represent, for example, the center position of the TN cell or the location where the network device of the TN cell is located.

[0338] Exemplarily, the first parameter value is indicated by hysteresisLocation in reportConfigNR. The first parameter value is the value of the first parameter. Optionally, the first parameter is also referred to as the hysteresis parameter Hys.

[0339] Exemplarily, the third threshold is indicated by distanceThreshFromReference in reportConfigNR. Optionally, the third threshold is represented by Thresh.

[0340] Step 902: When the first condition is satisfied, the terminal device sends a measurement report to the network device;

[0341] Exemplarily, the first condition includes the entry condition of the trigger event (Event D2), that is, the sum of the distance between the terminal device and the reference location and the first parameter value is less than the third threshold, that is, Ml + Hys < Thresh. It should be understood that the first condition can also be deformed based on mathematical principles: the distance between the terminal device and the reference location is less than the difference between the third threshold and the first parameter value, that is, Ml < Thresh - Hys.

[0342] In some embodiments, when the first condition is continuously satisfied, the terminal device sends a measurement report to the network device. That is to say, the terminal device reports a measurement report to the network device after satisfying the entry condition of the trigger event (Event D2) and lasting for the first time period. Optionally, the first time period is determined based on the measurement configuration. Optionally, the first time period is referred to as timeToTrigger.

[0343] In some embodiments, whether the first condition is satisfied is judged by the terminal device according to its own location information. The location information of the terminal device includes the absolute location information and / or relative location information of the terminal device.

[0344] The measurement report is used to indicate that the terminal device satisfies the first condition, that is, the measurement report is used to indicate that the sum of the distance between the terminal device and the reference position and the first parameter value is less than a third threshold. Optionally, the measurement report also includes the measurement results of the serving cell of the terminal device, and / or the measurement results of the candidate cell, and / or the measurement results of the neighboring cell of the terminal device.

[0345] Step 903: The network device sends second indication information to the terminal device;

[0346] The second indication information is used to instruct the terminal device to switch from the serving cell to the first cell, such as switching from the NTN cell to the TN cell.

[0347] The network device determines the target cell based on the received measurement report. Alternatively, the network device determines the target cell based on the location information of the terminal device and the measurement report.

[0348] In some embodiments, after receiving the measurement report, the network device combines the location-related report (at least one of the terminal device's location information, the serving cell's location information, the neighboring cell's location information, the candidate cell's location information, etc.) and the signal quality-related report (at least one of the serving cell's measurement results, the neighboring cell's measurement results, the candidate cell's measurement results, etc.), and determines whether the terminal device should perform the switching process from the NTN cell to the TN cell, and sends a second indication message to the terminal device after negotiation with the network device.

[0349] Exemplarily, the measurement report reported by the terminal device includes measurement results of NTN cell 1 (source cell or serving cell), NTN cell 2, TN cell 1, and TN cell 2. Among them, the measurement result of TN cell 1 is the best, and / or the distance between the terminal device and TN cell 1 is the shortest, and / or the terminal device enters the coverage area of ​​TN cell 1, then the network device determines that the target cell is TN cell 1. The first indication information sent by the network device is used to instruct the terminal device to switch from NTN cell 1 to TN cell 1.

[0350] Step 904: The terminal device performs cell switching based on the second indication information.

[0351] In some embodiments, the terminal device switches from the serving cell to the first cell based on the second indication information, such as switching from the NTN cell to the TN cell.

[0352] It should be understood that the design of the triggering event (Event D2) is equally applicable to cell handover scenarios other than the handover from an NTN cell to a TN cell. That is to say, in the scenario of cell handover based on the triggering event (Event D2), the source cell is not necessarily an NTN cell, and the target cell is not necessarily a TN cell. Regardless of the types of communication networks to which the source cell and the target cell belong, the design of the triggering event (Event D2) can enable the UE to switch to a target cell that meets the requirements and has guaranteed transmission quality as soon as possible.

[0353] In summary, for the method provided in the embodiments of this application, when the terminal device meets the first condition with the first cell, it can perform operations related to cell handover without waiting for the UE and the serving cell to meet the preset conditions, enabling the terminal device to switch to the first cell faster and utilize the advantages of the first cell in terms of transmission bandwidth, cell capacity, transmission delay, etc. to improve the transmission quality as early as possible. Moreover, the first condition belongs to a triggering event, and the handover from the serving cell to the first cell can be considered as a cell handover of the event-triggered type. When the UE is close enough to the first cell, the reporting of the measurement report can be triggered, facilitating the network device to timely issue an instruction for cell handover, thereby enabling the UE to switch from the serving cell to the first cell as soon as possible. Therefore, the method provided in the embodiments of this application not only ensures that the terminal device switches to the first cell as soon as possible but also can ensure the accuracy and rationality of cell handover by reporting the measurement report.

[0354] Regarding the first conditional event described in FIG. 4 or FIG. 6 or FIG. 8, an exemplary design of the first conditional event is provided here. Optionally, name the first conditional event described in FIG. 4 or FIG. 6 or FIG. 8 as CondEvent D2, or other names used to represent conditional events, such as CondEvent D3, CondEvent D4, etc.

[0355] First conditional event (CondEvent D2): The distance from the UE to the reference position of the Conditional Reconfiguration Candidate cell is less than a threshold.

[0356] The first condition of the first conditional event (CondEvent D2) (i.e., the entry condition of the first conditional event): Ml + Hys < Thresh. Here, Ml represents the distance between the terminal device and the reference position described above, that is, the distance between the terminal device and the TN cell; Hys represents the first parameter, and the value of the first parameter described above is the value of Hys. The first parameter is also called the hysteresis parameter; Thresh represents the third threshold described above.

[0357] The second condition of the first conditional event (CondEvent D2) (i.e., the departure condition for the triggering event): Ml - Hys > Thresh.

[0358] It should be noted that the first condition of the first conditional event (CondEvent D2) can also be Ml < Thresh, and the second condition can also be Ml > Thresh. In this application, an example is given with the first condition being Ml + Hys < Thresh and the second condition being Ml - Hys > Thresh.

[0359] Exemplarily, the CondTriggerConfig in ReportConfigNR is extended as follows:

[0360] Next, a cell switching method based on the first conditional event (CondEvent D2) is introduced. As shown in Figure 10, this method is executed by the terminal device and the network device, and this method includes at least some of the following steps:

[0361] Step 1001: The network device sends a measurement configuration to the terminal device, which includes the first conditional event;

[0362] In the embodiments of this application, an example is given where the serving cell of the terminal device includes an NTN cell and the first cell includes a TN cell.

[0363] In some embodiments, the measurement configuration is carried in the RRC reconfiguration information.

[0364] In some embodiments, the measurement configuration includes at least one of the measurement object, reporting configuration, measurement identifier, and measurement interval described above. Among them, the first conditional event (CondEvent D2) is configured. Optionally, other measurement events are also included in the measurement configuration. The configuration of the first conditional event (CondEvent D2) may include at least one of the following: reference location; first parameter value; third threshold.

[0365] Exemplarily, the reference location is indicated by referenceLocation in reportConfigNR. The reference location, for example, represents the center location of the CHO candidate TN cell or the location of the network device of the CHO candidate TN cell.

[0366] Exemplarily, the first parameter value is indicated by hysteresisLocation in reportConfigNR. The first parameter value is the value of the first parameter. Optionally, the first parameter is also called the hysteresis parameter Hys.

[0367] Exemplarily, the third threshold is indicated by distanceThreshFromReference in reportConfigNR. Optionally, the third threshold is represented by Thresh.

[0368] Step 1002: When the first condition is met, the terminal device performs CHO.

[0369] In some embodiments, when the sum of the distance between the terminal device and the reference position and the first parameter value is less than the third threshold, the terminal device performs CHO from the serving cell to the first cell, such as CHO from an NTN cell to a TN cell.

[0370] Exemplarily, the first condition includes the entry condition of the first conditional event (CondEvent D2), that is, the sum of the distance between the terminal device and the reference position and the first parameter value is less than the third threshold, that is, Ml + Hys < Thresh. It should be understood that the first condition can also be transformed based on mathematical principles into: the distance between the terminal device and the reference position is less than the difference between the third threshold and the first parameter value, that is, Ml < Thresh - Hys.

[0371] In some embodiments, when the first condition is continuously met, the terminal device performs CHO from an NTN cell to a TN cell. That is, the terminal device performs CHO from an NTN cell to a TN cell after meeting the entry condition of the first conditional event (CondEvent D2) and lasting for the second time period. Optionally, the second time period is determined based on the measurement configuration. Optionally, the second time period is called timeToTrigger.

[0372] In some embodiments, whether the first condition is met is judged by the terminal device according to its own location information. The location information of the terminal device includes the absolute location information and / or relative location information of the terminal device.

[0373] Exemplarily, the terminal device measures NTN cell 1 (source cell or serving cell), NTN cell 2, TN cell 1, and TN cell 2 according to the measurement configuration. Among them, if the measurement result of TN cell 1 is the best, and / or the distance between the terminal device and TN cell 1 is the closest, and / or the terminal device enters the coverage area of TN cell 1, then the terminal device determines the target cell as TN cell 1 and performs CHO from the NTN cell to TN cell 1.

[0374] In some embodiments, when the first condition is satisfied and the entry conditions of the second conditional event are satisfied, the terminal device performs a CHO from the NTN cell to the TN cell. The second conditional event includes the CHO execution conditions corresponding to the TN cell in addition to the first conditional event. Exemplarily, the second conditional event includes at least one of CondEvent A3, CondEvent A4, and CondEvent A5. The second conditional event is determined by the network device configuration or the communication protocol.

[0375] In some embodiments, when the first condition is continuously satisfied and an entry condition of a second conditional event is satisfied, the terminal device performs CHO from the NTN cell to the TN cell.

[0376] It should be understood that the design of the first conditional event (CondEvent D2) is also applicable to cell handover scenarios other than NTN cell to TN cell handover. That is, the source cell for a cell handover based on the first conditional event (CondEvent D2) is not necessarily an NTN cell, and the target cell is not necessarily a TN cell. Regardless of the communication network to which the source and target cells belong, the design of the first conditional event (CondEvent D2) ensures that the UE is quickly handed over to a target cell that meets the requirements and has guaranteed transmission quality.

[0377] In summary, the method provided in the embodiment of the present application is that the terminal device can perform operations related to cell switching when the first condition is satisfied with the first cell, without waiting for the preset conditions to be satisfied between the UE and the serving cell, so that the terminal device can switch to the first cell more quickly, and utilize the advantages of the first cell in terms of transmission bandwidth, cell capacity, transmission delay, etc. as early as possible to improve the transmission quality. In addition, the switching from the serving cell to the first cell can be considered as a CHO type of cell switching. When the UE determines that it has entered the coverage of the first cell based on the first information, the CHO from the serving cell to the first cell can be executed. Therefore, the method provided in the embodiment of the present application not only ensures that the terminal device switches to the first cell as soon as possible, but also improves the simplicity of cell switching and reduces the transmission resource consumption required for indication information and measurement reports.

[0378] FIG11 is a flow chart of a cell handover method provided by an exemplary embodiment of the present application. The method is performed by a terminal device and a network device, and includes at least some of the following steps:

[0379] Step 1101: The network device configures second information to the terminal device;

[0380] The second information is used by the terminal device to evaluate whether it satisfies the first condition. For example, the second information is used by the terminal device to evaluate whether it enters the coverage of the first cell.

[0381] For the relevant content of the second information, please refer to step 520 and will not be repeated here.

[0382] Optionally, the second information is called fingerprint information or auxiliary information.

[0383] Optionally, the second information is sent via RRC dedicated signaling.

[0384] Step 1102: When the terminal device detects the second information, it sends the first indication information to the network device;

[0385] For the relevant content of the first indication information, please refer to step 520 and will not be repeated here.

[0386] Step 1103: The network device sends second indication information to the terminal device;

[0387] The network device sends the second indication information based on the received first indication information. Alternatively, the network device sends the second indication information based on the location information of the terminal device and the first indication information.

[0388] In some embodiments, the first indication information is sent via RRC signaling or MAC signaling.

[0389] Step 1104: The terminal device performs cell switching based on the second indication information.

[0390] In some embodiments, the terminal device switches from the serving cell to the first cell based on the second indication information, such as switching from the NTN cell to the TN cell.

[0391] It should be understood that the design of the second information is also applicable to cell handover scenarios other than NTN cell handover. That is, in cell handover scenarios based on the second information, the source cell is not necessarily an NTN cell, and the target cell is not necessarily a TN cell. Regardless of the communication networks to which the source and target cells belong, the design of the second information can enable the UE to quickly handover to a target cell that meets the requirements and provides guaranteed transmission quality.

[0392] In summary, the method provided in the embodiment of the present application uses a first condition determined based on the second information to evaluate the terminal device and the first cell, without considering the distance between the UE and the serving cell. The terminal device can switch to the first cell more quickly, allowing the terminal device to utilize the advantages of the first cell in transmission bandwidth, cell capacity, and transmission delay as early as possible, thereby improving transmission quality. Furthermore, the introduction of the first indication information not only ensures that the terminal device switches to the first cell as quickly as possible, but also ensures the accuracy and rationality of the cell switching by reporting the first indication information.

[0393] FIG12 is a schematic flow chart of a cell handover method provided by an exemplary embodiment of the present application. The method is performed by a terminal device and a network device, and includes at least some of the following steps:

[0394] Step 1201: The network device configures second information to the terminal device;

[0395] The second information is used by the terminal device to evaluate whether it satisfies the first condition. For example, the second information is used by the terminal device to evaluate whether it enters the coverage of the first cell.

[0396] For the relevant content of the second information, please refer to step 520 and will not be repeated here.

[0397] Optionally, the second information is called fingerprint information or auxiliary information.

[0398] Optionally, the second information is sent via RRC dedicated signaling.

[0399] Step 1202: When the terminal device detects the first information, it performs CHO from the NTN cell to the TN cell.

[0400] In some embodiments, upon detecting the first information, the terminal device performs CHO from the serving cell to the first cell, such as CHO from the NTN cell to the TN cell.

[0401] It should be understood that the design of the second information is also applicable to cell handover scenarios other than NTN cell handover. That is, in cell handover scenarios based on the second information, the source cell is not necessarily an NTN cell, and the target cell is not necessarily a TN cell. Regardless of the communication networks to which the source and target cells belong, the design of the second information can enable the UE to quickly handover to a target cell that meets the requirements and provides guaranteed transmission quality.

[0402] In summary, the method provided in the embodiments of the present application uses a first condition determined based on second information to evaluate the terminal device and the first cell, without considering the distance between the UE and the serving cell. This allows the terminal device to switch to the first cell more quickly, allowing the terminal device to utilize the advantages of the first cell in transmission bandwidth, cell capacity, and transmission latency as early as possible, thereby improving transmission quality. Furthermore, the method improves the simplicity of cell switching and reduces the transmission resource consumption required for indication information and measurement reports.

[0403] FIG13 shows a block diagram of a cell handover apparatus provided by an exemplary embodiment of the present application. The apparatus may be implemented as the apparatus shown in FIG2 , FIG3 , FIG4 , FIG5 , FIG6 , FIG9 , FIG10 , FIG11 , or FIG12 , or as a portion of the apparatus shown in FIG2 , FIG3 , FIG4 , FIG5 , FIG6 , FIG9 , FIG10 , FIG11 , or FIG12 . The apparatus includes a processing module 1310 and / or a sending module 1330. Optionally, the apparatus also includes a receiving module 1350.

[0404] The sending module 1330 is configured to send first information to the network device when the apparatus and the first cell meet a first condition; and / or,

[0405] The processing module 1310 is configured to perform a handover from a serving cell to the first cell when the device and the first cell satisfy the first condition.

[0406] In some embodiments, the first condition includes at least one of the following: the distance between the device and the first cell is less than a first threshold; the distance between the device and the first cell is equal to the first threshold; the device enters the coverage of the first cell.

[0407] In some embodiments, the first condition is a triggering event.

[0408] In some embodiments, the first information comprises a measurement report.

[0409] In some embodiments, the sending module 1330 is further used to: when the distance between the device and the first cell is less than the first threshold, send the measurement report to the network device, and the measurement report is used to indicate that the distance between the device and the first cell is less than the first threshold.

[0410] In some embodiments, the sending module 1330 is further used to: send the measurement report to the network device when the distance between the terminal device and the first cell is less than or equal to the first threshold within a first time period.

[0411] In some embodiments, the processing module 1310 is further configured to add a first measurement report entry to the measurement report list variable.

[0412] In some embodiments, the measurement report further includes a measurement result of the serving cell and / or a measurement result of the first cell.

[0413] In some embodiments, the first condition pertains to a first conditional event;

[0414] In some embodiments, the processing module 1310 is further configured to: perform a conditional handover (CHO) from the serving cell to the first cell when the distance between the apparatus and the first cell is less than or equal to the first threshold; or

[0415] When the distance between the device and the first cell is less than or equal to the first threshold and a second conditional event is satisfied, performing CHO from the serving cell to the first cell;

[0416] The second conditional event includes a CHO execution condition corresponding to the first cell except for the first conditional event.

[0417] In some embodiments, the processing module 1310 is further used to: when the distance between the terminal device and the first cell is less than or equal to the first threshold within a first time period, and when a second conditional event is met within the first time period, perform CHO from the serving cell to the first cell.

[0418] In some embodiments, the sending module 1330 is further configured to not send the first information to the network device if the apparatus and the first cell meet a second condition;

[0419] And / or, the processing module 1310 is further configured to not perform handover from the serving cell to the first cell when the device and the first cell satisfy the second condition.

[0420] In some embodiments, the processing module 1310 and / or the sending module 1330 is further configured to execute the first step when the terminal device and the first cell satisfy a second condition.

[0421] In some embodiments, the first step includes at least one of the following:

[0422] Delete the first measurement report entry in the measurement report list variable;

[0423] not sending the first information to the network device;

[0424] not performing handover from the serving cell to the first cell;

[0425] Sending second information to the network device, where the second information is used to indicate that the terminal device meets the second condition;

[0426] The second information is sent to the network device, where the second information is used to indicate that the terminal device does not meet the first condition.

[0427] In some embodiments, the processing module 1310 and / or the sending module 1330 is further configured to execute the first step when the terminal device and the first cell satisfy a second condition within a second time period.

[0428] In some embodiments, the second condition includes at least one of the following: the distance between the device and the first cell is greater than or equal to a second threshold; the device does not enter the coverage of the first cell.

[0429] In some embodiments, the second condition includes a distance between the apparatus and the first cell being greater than or equal to a second threshold.

[0430] In some embodiments, the second condition is a trigger event, or the second condition is a first condition event.

[0431] In some embodiments, the configuration information of the trigger event includes at least one of the following: a reference position; a first parameter value; a third threshold;

[0432] The first threshold is the third threshold, or the first threshold is the difference between the third threshold and the first parameter value; the second threshold is the third threshold, or the second threshold is the sum of the third threshold and the first parameter value.

[0433] In some embodiments, the configuration information of the first conditional event includes at least one of the following: a reference position; a first parameter value; a third threshold value; wherein the first threshold value is the third threshold value, or the first threshold value is the difference between the third threshold value and the first parameter value;

[0434] The second threshold is the third threshold, or the second threshold is the sum of the third threshold and the first parameter value.

[0435] In some embodiments, the distance between the apparatus and the first cell is the distance between the apparatus and the first reference location.

[0436] In some embodiments, the trigger event is configured by the network device, or agreed upon by a communication protocol.

[0437] In some embodiments, the first conditional event is configured by the network device, or agreed upon by a communication protocol.

[0438] In some embodiments, the apparatus entering coverage of the first cell is determined based on second information.

[0439] In some embodiments, the second information includes at least one of the following: measurement results of at least one candidate cell, the measurement results of the at least one candidate cell are associated with the coverage range of the first cell; measurement results of at least one beam, the measurement results of the at least one beam are associated with the coverage range of the first cell; non-cellular wireless information; location information of the first cell.

[0440] In some embodiments, the non-cellular wireless information includes at least one of the following information: information carried by WLAN signals; information indicated by WLAN signals; information carried by Wi-Fi signals; information indicated by Wi-Fi signals; information carried by Bluetooth signals; information indicated by Bluetooth signals; information carried by radar signals; information indicated by radar signals.

[0441] In some embodiments, the second information is configured by the network device or agreed upon by a communication protocol.

[0442] In some embodiments, the first condition includes the apparatus entering coverage of the first cell.

[0443] In some embodiments, the first information includes first indication information.

[0444] In some embodiments, the sending module 1330 is further used to: when the apparatus enters the coverage of the first cell, send first indication information to the network device, wherein the first indication information is used to indicate that the apparatus enters the coverage of the first cell.

[0445] In some embodiments, the sending module 1330 is further configured to: when the apparatus remains within the coverage of the first cell within a first time period, send first indication information to the network device.

[0446] In some embodiments, the processing module 1310 is further configured to: when the apparatus enters coverage of the first cell, perform CHO from the serving cell to the first cell; or

[0447] When the device enters the coverage of the first cell and a second conditional event is satisfied, performing a CHO from the serving cell to the first cell;

[0448] The second conditional event includes a CHO execution condition corresponding to the first cell except for the first conditional event.

[0449] In some embodiments, the processing module 1310 is further configured to: when the apparatus remains within the coverage of the first cell within a first time period, perform CHO from the serving cell to the first cell.

[0450] In some embodiments, the processing module 1310 is further configured to: ensure that the device remains within the coverage of the first cell within a first time period, and, if a second condition event is met within the first time period, execute CHO from the serving cell to the first cell.

[0451] In some embodiments, the first cell comprises an NTN cell or a TN cell.

[0452] To sum up, the device provided in the embodiment of the present application supports the use of a first condition to evaluate the device and the first cell. When the device and the first cell meet the first condition, operations related to cell switching can be performed without waiting for the UE and the serving cell to meet the preset conditions, so that the device can switch to the first cell faster and utilize the advantages of the first cell in transmission bandwidth, cell capacity, transmission delay, etc. as soon as possible to improve transmission quality.

[0453] FIG14 shows a block diagram of a cell handover apparatus according to an exemplary embodiment of the present application. The apparatus may be implemented as the apparatus shown in FIG7 , FIG8 , FIG9 , FIG10 , FIG11 , or FIG12 , or may be implemented as a portion of the apparatus shown in FIG7 , FIG8 , FIG9 , FIG10 , FIG11 , or FIG12 . The apparatus includes a sending module 1410 and optionally a receiving module 1430.

[0454] The sending module 1410 is used to configure a first condition for the terminal device; wherein the first condition is used to evaluate the terminal device and the first cell.

[0455] In some embodiments, the first condition includes at least one of the following: the distance between the terminal device and the first cell is less than a first threshold; the distance between the terminal device and the first cell is equal to the first threshold; the terminal device enters the coverage range of the first cell.

[0456] In some embodiments, the apparatus further includes a receiving module 1430 for receiving first information sent by the terminal device.

[0457] In some embodiments, the first condition is a triggering event.

[0458] In some embodiments, the receiving module 1430 is further used to receive a measurement report sent by the terminal device, where the measurement report is used to indicate that the distance between the terminal device and the first cell is less than the first threshold.

[0459] In some embodiments, the first condition pertains to a first conditional event.

[0460] In some embodiments, the sending module 1410 is further configured to configure a second conditional event for the terminal device, where the second conditional event includes a CHO execution condition corresponding to the first cell except for the first conditional event.

[0461] In some embodiments, the sending module 1410 is further configured to configure a second condition for the terminal device.

[0462] In some embodiments, the second condition includes at least one of the following: the distance between the terminal device and the first cell is greater than or equal to a second threshold; the terminal device does not enter the coverage of the first cell.

[0463] In some embodiments, the second condition includes that the distance between the terminal device and the first cell is greater than or equal to a second threshold.

[0464] In some embodiments, the second condition is a trigger event, or the second condition is a first condition event.

[0465] In some embodiments, the configuration information of the trigger event includes at least one of the following: a reference position; a first parameter value; a third threshold;

[0466] The first threshold is the third threshold, or the first threshold is the difference between the third threshold and the first parameter value; the second threshold is the third threshold, or the second threshold is the sum of the third threshold and the first parameter value.

[0467] In some embodiments, the configuration information of the first conditional event includes at least one of the following: a reference position; a first parameter value; a third threshold; wherein the first threshold is the third threshold, or the first threshold is the difference between the third threshold and the first parameter value; the second threshold is the third threshold, or the second threshold is the sum of the third threshold and the first parameter value.

[0468] In some embodiments, the distance between the terminal device and the first cell is the distance between the terminal device and the reference position.

[0469] In some embodiments, the coverage range of the first cell entered by the terminal device is determined based on second information.

[0470] In some embodiments, the second information includes at least one of the following: measurement results of at least one candidate cell, the measurement results of the at least one candidate cell are associated with the coverage range of the first cell; measurement results of at least one beam, the measurement results of the at least one beam are associated with the coverage range of the first cell; non-cellular wireless information; location information of the first cell.

[0471] In some embodiments, the non-cellular wireless information includes at least one of the following information: information carried by WLAN signals; information indicated by WLAN signals; information carried by Wi-Fi signals; information indicated by Wi-Fi signals; information carried by Bluetooth signals; information indicated by Bluetooth signals; information carried by radar signals; information indicated by radar signals.

[0472] In some embodiments, the sending module 1410 is further configured to configure the second information to the terminal device.

[0473] In some embodiments, the receiving module 1430 is further used to receive first indication information sent by the terminal device, where the first indication information is used to indicate that the terminal device enters the coverage of the first cell.

[0474] In some embodiments, the sending module 1410 is further used to send second indication information to the terminal device, where the second indication information is used to instruct the terminal device to switch from the serving cell to the first cell.

[0475] In some embodiments, the first cell comprises an NTN cell or a TN cell.

[0476] In summary, in the apparatus provided in the embodiments of the present application, the first condition can be used to evaluate the terminal device and the first cell. This allows the terminal device to perform operations related to cell switching when the first condition is satisfied between the terminal device and the first cell, without having to wait for the preset condition between the terminal device and the serving cell to be satisfied. This allows the terminal device to switch to the first cell more quickly, and to utilize the advantages of the first cell in terms of transmission bandwidth, cell capacity, transmission delay, etc. as soon as possible to improve transmission quality.

[0477] Figure 15 shows a schematic structural diagram of a communication device 1500 provided by an exemplary embodiment of the present application, including a processor 1501, a receiver 1502, a transmitter 1503, a memory 1504, and a bus 1505. The communication device 1500 may be used to execute at least some of the steps executed by the terminal device shown in Figure 2, Figure 3, Figure 4, Figure 5, Figure 6, Figure 9, Figure 10, Figure 11, or Figure 12, or may be used to execute at least some of the steps executed by the network device shown in Figure 7, Figure 8, Figure 9, Figure 10, Figure 11, or Figure 12.

[0478] The processor 1501 includes one or more processing cores, and the processor 1501 executes various functional applications and information processing by running software programs and modules. In some embodiments, the processor 1501 can be used to implement the functions and steps of the processing module 1310 described above.

[0479] Receiver 1502 and transmitter 1503 may be implemented as a communication component, which may be a communication chip and referred to as a transceiver. In some embodiments, receiver 1502 may be used to implement the functions and steps of receiving module 1350 and / or receiving module 1430 described above, and transmitter 1503 may be used to implement the functions and steps of transmitting module 1330 and / or transmitting module 1410 described above.

[0480] The memory 1504 is connected to the processor 1501 via a bus 1505 .

[0481] The memory 1504 may be used to store at least one instruction, and the processor 1501 may be used to execute the at least one instruction to implement each step in the above method embodiment.

[0482] In addition, the memory 1504 can be implemented by any type of volatile or non-volatile storage device or a combination thereof. Volatile or non-volatile storage devices include but are not limited to: magnetic disks or optical disks, electrically erasable programmable read-only memory (EEPROM), erasable programmable read-only memory (EPROM), static random access memory (SRAM), read-only memory (ROM), magnetic memory, flash memory, and programmable read-only memory (PROM).

[0483] In some embodiments, the receiver 1502 receives signals / data independently, or the processor 1501 controls the receiver 1502 to receive signals / data, or the processor 1501 requests the receiver 1502 to receive signals / data, or the processor 1501 cooperates with the receiver 1502 to receive signals / data.

[0484] In some embodiments, the transmitter 1503 independently sends signals / data, or the processor 1501 controls the transmitter 1503 to send signals / data, or the processor 1501 requests the transmitter 1503 to send signals / data, or the processor 1501 cooperates with the transmitter 1503 to send signals / data.

[0485] In an exemplary embodiment of the present application, a computer-readable storage medium is further provided, in which at least one program is stored. The at least one program is loaded and executed by the processor to implement the cell switching method provided by the above-mentioned various method embodiments.

[0486] In an exemplary embodiment of the present application, a chip is further provided, which includes a programmable logic circuit and / or program instructions. When the chip runs on a communication device, it is used to implement the cell switching method provided by the above-mentioned various method embodiments.

[0487] In an exemplary embodiment of the present application, a computer program product is further provided. When the computer program product is executed on a processor of a computer device, the computer device is enabled to execute the above-mentioned cell switching method.

[0488] In an exemplary embodiment of the present application, a computer program is further provided. The computer program includes computer instructions. A processor of a computer device executes the computer instructions, so that the computer device executes the above-mentioned cell switching method.

[0489] Those skilled in the art will understand that all or part of the steps to implement the above embodiments may be accomplished by hardware, or may be accomplished by a program instructing the relevant hardware, and the program may be stored in a computer-readable storage medium, and the above-mentioned storage medium may be a read-only memory, a disk, or an optical disk, etc.

[0490] The above are only optional embodiments of the present application and are not intended to limit the present application. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present application should be included in the scope of protection of the present application.

Claims

1. A cell switching method, characterized in that: The method is performed by a terminal device, and the method includes: When the terminal device and the first cell satisfy the first condition, first information is sent to the network device, and / or switching is performed from the serving cell to the first cell.

2. The method according to claim 1, characterized in that The first condition includes at least one of the following: The distance between the terminal device and the first cell is less than a first threshold; The distance between the terminal device and the first cell is equal to the first threshold; The terminal device enters the coverage of the first cell.

3. The method according to claim 2, characterized in that The first condition includes that the distance between the terminal device and the first cell is less than or equal to the first threshold, and the first information includes a measurement report; The sending a measurement report to a network device when the terminal device and the first cell meet a first condition includes: In a case where the distance between the terminal device and the first cell is less than or equal to the first threshold, the measurement report is sent to the network device, where the measurement report is used to indicate that the distance between the terminal device and the first cell is less than or equal to the first threshold.

4. The method according to claim 2, characterized in that: The first condition includes that the distance between the terminal device and the first cell is less than or equal to the first threshold, and the first information includes a measurement report; The sending a measurement report to a network device when the terminal device and the first cell meet a first condition includes: When the distance between the terminal device and the first cell is less than or equal to the first threshold within a first time period, the measurement report is sent to the network device.

5. The method according to claim 3 or 4, characterized in that: The method further comprises: Add the first measurement report entry to the measurement report list variable.

6. The method according to any one of claims 3 to 5, characterized in that: The measurement report also includes a measurement result of the serving cell and / or a measurement result of the first cell.

7. The method according to claim 2, characterized in that The first condition includes that the distance between the terminal device and the first cell is less than or equal to the first threshold; The performing the handover from the serving cell to the first cell when the terminal device and the first cell meet the first condition includes: When the distance between the terminal device and the first cell is less than the first threshold, performing a conditional handover CHO from the serving cell to the first cell; or, When the distance between the terminal device and the first cell is equal to the first threshold, a CHO from the serving cell to the first cell is performed.

8. The method according to claim 2, characterized in that: The first condition includes that the distance between the terminal device and the first cell is less than or equal to the first threshold: The performing the handover from the serving cell to the first cell when the terminal device and the first cell meet the first condition includes: When the distance between the terminal device and the first cell is less than or equal to the first threshold within a first time period, a conditional handover CHO from the serving cell to the first cell is performed.

9. The method according to any one of claims 1 to 8, characterized in that: The method further comprises: When the terminal device and the first cell meet a second condition, executing the first step; The first step includes at least one of the following: Deleting the first measurement report entry in the measurement report list variable; not sending the first information to the network device; not performing handover from the serving cell to the first cell; Sending second information to the network device, where the second information is used to indicate that the terminal device meets the second condition; The second information is sent to the network device, where the second information is used to indicate that the terminal device does not meet the first condition.

10. The method according to claim 9, characterized in that When the terminal device and the first cell meet the second condition, performing the first step includes: When the terminal device and the first cell satisfy the second condition within a second time period, the first step is performed.

11. The method according to claim 9 or 10, characterized in that: The second condition includes at least one of the following: The distance between the terminal device and the first cell is greater than a second threshold; The distance between the terminal device and the first cell is equal to the second threshold; The terminal device does not enter the coverage of the first cell; The terminal device does not enter the coverage of the first cell within a second time period.

12. The method according to any one of claims 1 to 11, characterized in that: The first condition is a trigger event or a first condition event.

13. The method according to any one of claims 9 to 11, characterized in that: The second condition belongs to a triggering event or a first condition event.

14. The method according to claim 12 or 13, characterized in that The configuration information of the triggering event includes at least one of the following: Reference location; The first parameter value; The third threshold; Wherein, the first threshold is the third threshold, or the first threshold is the difference between the third threshold and the first parameter value; The second threshold is the third threshold, or the second threshold is the sum of the third threshold and the first parameter value.

15. The method according to claim 12 or 13, characterized in that The configuration information of the first condition event includes at least one of the following: Reference location; The first parameter value; The third threshold; Wherein, the first threshold is the third threshold, or the first threshold is the difference between the third threshold and the first parameter value; The second threshold is the third threshold, or the second threshold is the sum of the third threshold and the first parameter value.

16. The method according to claim 14 or 15, characterized in that The distance between the terminal device and the first cell is the distance between the terminal device and the reference position.

17. The method according to any one of claims 12 to 16, characterized in that: The trigger event is configured by the network device or agreed upon by a communication protocol.

18. The method according to any one of claims 12 to 16, characterized in that: The first condition event is configured by the network device or agreed upon by a communication protocol.

19. The method according to claim 2 or 11, characterized in that: The terminal device entering the coverage of the first cell is determined based on second information, where the second information includes at least one of the following: a measurement result of at least one candidate cell, where the measurement result of the at least one candidate cell is associated with the coverage of the first cell; a measurement result of at least one beam, where the measurement result of the at least one beam is associated with the coverage of the first cell; non-cellular wireless information; The location information of the first cell.

20. The method according to claim 19, characterized in that The non-cellular wireless information includes at least one of the following information: Information carried by wireless local area network (WLAN) signals; Information indicated by WLAN signals; Information carried by Wi-Fi signals; Information indicated by Wi-Fi signal; Information carried by Bluetooth signals; Information indicated by Bluetooth signals; Information carried by radar signals; Information indicated by radar signals.

21. The method according to claim 19 or 20, characterized in that The second information is configured by the network device or agreed upon by a communication protocol.

22. The method according to any one of claims 19 to 21, characterized in that: The first condition includes that the terminal device enters the coverage of the first cell, and the first information includes first indication information; The sending first information to the network device when the terminal device and the first cell meet the first condition includes: In the case where the terminal device enters the coverage of the first cell, first indication information is sent to the network device, where the first indication information is used to indicate that the terminal device enters the coverage of the first cell.

23. The method according to claim 22, characterized in that When the terminal device enters the coverage of the first cell, sending first indication information to the network device includes: When the terminal device is within the coverage of the first cell within a first time period, the first indication information is sent to the network device.

24. The method according to any one of claims 19 to 21, characterized in that: The first condition includes that the terminal device enters the coverage of the first cell; The performing the handover from the serving cell to the first cell when the terminal device and the first cell meet the first condition includes: When the terminal device enters the coverage of the first cell, a conditional handover (CHO) from the serving cell to the first cell is performed.

25. The method according to claim 24, characterized in that The performing CHO from the serving cell to the first cell when the terminal device enters the coverage of the first cell includes: When the terminal device is within the coverage of the first cell during a first time period, a CHO from the serving cell to the first cell is performed.

26. The method according to any one of claims 1 to 25, characterized in that: The first cell includes a non-terrestrial communication network NTN cell or a terrestrial communication network TN cell.

27. A cell switching method, characterized in that: The method is performed by a network device, and the method includes: Configuring the first condition for the terminal device; The first condition is used to evaluate the terminal device and the first cell.

28. The method according to claim 27, characterized in that The first condition includes at least one of the following: The distance between the terminal device and the first cell is less than a first threshold; The distance between the terminal device and the first cell is equal to the first threshold; The terminal device enters the coverage of the first cell.

29. The method according to claim 28, characterized in that The method further comprises: Receive first information sent by the terminal device.

30. The method according to claim 29, characterized in that The receiving the first information sent by the terminal device includes: Receive a measurement report sent by the terminal device, where the measurement report is used to indicate that the distance between the terminal device and the first cell is less than or equal to the first threshold.

31. The method according to any one of claims 27 to 30, characterized in that: The method further comprises: configuring a second condition for the terminal device; The second condition is used to evaluate the terminal device and the first cell.

32. The method according to claim 31, characterized in that The second condition includes at least one of the following: The distance between the terminal device and the first cell is greater than a second threshold; The distance between the terminal device and the first cell is equal to the second threshold; The terminal device does not enter the coverage of the first cell; The terminal device does not enter the coverage of the first cell within a second time period.

33. The method according to any one of claims 27 to 32, characterized in that: The first condition is a trigger event or a first condition event.

34. The method according to claim 31 or 32, characterized in that The second condition belongs to a triggering event or a first condition event.

35. The method according to claim 33 or 34, characterized in that The configuration information of the triggering event includes at least one of the following: Reference location; The first parameter value; The third threshold; Wherein, the first threshold is the third threshold, or the first threshold is the difference between the third threshold and the first parameter value; The second threshold is the third threshold, or the second threshold is the sum of the third threshold and the first parameter value.

36. The method according to claim 33 or 34, characterized in that The configuration information of the first condition event includes at least one of the following: Reference location; The first parameter value; The third threshold; Wherein, the first threshold is the third threshold, or the first threshold is the difference between the third threshold and the first parameter value; The second threshold is the third threshold, or the second threshold is the sum of the third threshold and the first parameter value.

37. The method according to claim 35 or 36, characterized in that The distance between the terminal device and the first cell is the distance between the terminal device and the reference position.

38. The method according to claim 28 or 32, characterized in that The terminal device entering the coverage of the first cell is determined based on second information, where the second information includes at least one of the following: a measurement result of at least one candidate cell, where the measurement result of the at least one candidate cell is associated with the coverage of the first cell; a measurement result of at least one beam, where the measurement result of the at least one beam is associated with the coverage of the first cell; non-cellular wireless information; The location information of the first cell.

39. The method according to claim 38, characterized in that The non-cellular wireless information includes at least one of the following information: Information carried by wireless local area network (WLAN) signals; Information indicated by WLAN signals; Information carried by Wi-Fi signals; Information indicated by Wi-Fi signal; Information carried by Bluetooth signals; Information indicated by Bluetooth signals; Information carried by radar signals; Information indicated by radar signals.

40. The method according to claim 38 or 39, characterized in that The method further comprises: The second information is configured for the terminal device.

41. The method according to claim 29, characterized in that The receiving the first information sent by the terminal device includes: Receive first indication information sent by the terminal device, where the first indication information is used to indicate that the terminal device enters the coverage of the first cell.

42. The method according to claim 30 or 41, characterized in that The method further comprises: Send second indication information to the terminal device, where the second indication information is used to instruct the terminal device to switch from the serving cell to the first cell.

43. The method according to any one of claims 27 to 42, characterized in that The first cell includes an NTN cell or a terrestrial communication network TN cell.

44. A cell switching device, characterized in that: The device comprises: a sending module, configured to send first information to a network device when the device and the first cell meet a first condition; and / or, A processing module is used to perform switching from a serving cell to the first cell when the device and the first cell meet the first condition.

45. A cell switching device, characterized in that: The device comprises: A sending module, used for configuring the first condition to the terminal device; The first condition is used to evaluate the terminal device and the first cell.

46. ​​A communication device, characterized in that: The communication device comprises: processor; a receiver and / or transmitter connected to the processor; a memory for storing executable instructions for the processor; The communication device is used to implement the cell switching method as described in any one of claims 1 to 26, or any one of claims 27 to 43.

47. A computer-readable storage medium, characterized in that The readable storage medium stores executable instructions, and the executable instructions are loaded and executed by the processor to implement the cell switching method as described in any one of claims 1 to 26, or any one of claims 27 to 43.

48. A chip, characterized in that: The chip includes a programmable logic circuit or a program, and the chip is used to implement the cell switching method as described in any one of claims 1 to 26, or any one of claims 27 to 43.

49. A computer program product, characterized in that The computer program product includes computer instructions, which are stored in a computer-readable storage medium. A processor of a computer device reads the computer instructions from the computer-readable storage medium, and the processor executes the computer instructions, so that the computer device executes the cell switching method as described in any one of claims 1 to 26, or any one of claims 27 to 43.

50. A computer program, characterized in that The computer program includes computer instructions, and a processor of a computer device executes the computer instructions, so that the computer device executes the cell switching method according to any one of claims 1 to 26, or any one of claims 27 to 43.

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