Cell switching method and communication equipment

Abstract

According to the cell switching method and the communication device, when it is judged that the signal quality of the service cell is poor and the signal quality of the target cell tends to become good, the terminal device can initiate the switching request to the network device in advance, so that the service experience of a user can be guaranteed as much as possible, and the user experience is improved. And the service of the user is prevented from being influenced by switching to the greatest extent.

Description

Technical Field

[0001] The present application relates to the field of communications, and more specifically, to a cell switching method and a communication device. Background Art

[0002] At present, the terminal device can measure the signal quality of the reference signal receiving power (RSRP) of the target cell and the signal quality of the RSRP of the current serving cell. When the difference between the signal quality of the RSRP of the target cell and the signal quality of the RSRP of the current serving cell is greater than a certain threshold, the network device will trigger the terminal device to switch to the target cell. According to the existing scheme, as long as the difference between the signal quality of the RSRP of the target cell and the signal quality of the RSRP of the current serving cell does not meet a certain threshold, the terminal device cannot trigger the switch. This scheme is mainly considered to ensure the user's service experience after the terminal device is switched, but it ignores the poor signal quality that the terminal device needs to suffer in the current serving cell before the switch. In other words, the existing scheme ignores the problem of poor user service experience in the period before the switch. Summary of the invention

[0003] The present application provides a cell switching method, which can ensure the service experience of users as much as possible and prevent the services of users from being affected by the switching to the greatest extent.

[0004] In a first aspect, a cell switching method is provided, which may be executed by a terminal device, or may also be executed by a component (such as a chip or a circuit) of the terminal device, without limitation.

[0005] The method includes: determining that the signal quality of a service cell is greater than a first threshold and less than or equal to a fourth threshold, wherein the fourth threshold is used to determine whether the signal quality of the service cell has deteriorated, and; determining that the signal quality of a target cell is greater than or equal to a second threshold, wherein the second threshold is used to determine whether the signal quality of the target cell has improved, and / or determining that the absolute value of the difference between the signal strength of the service cell and the signal strength of the target cell is less than or equal to a third threshold, wherein the third threshold is greater than or equal to 0; sending a first message to a network device, the first message being used to request triggering a switch to the target cell; and receiving a second message from the network device, the second message being used to instruct a terminal device to switch to the target cell.

[0006] Exemplarily, the first message may be a measurement report, and the measurement report carries the measurement result.

[0007] For example, in a possible implementation, the signal quality of the serving cell may be the RSRP of the serving cell. For example, the signal quality of the target cell may be the RSRP of the target cell.

[0008] In the present application, "the fourth threshold is used to determine whether the signal quality of the serving cell has deteriorated" can be understood as, when the signal quality of the serving cell is less than or equal to the fourth threshold, it means that the signal quality of the serving cell has deteriorated, and when the signal quality of the serving cell is greater than the fourth threshold, it means that the signal quality of the current serving cell is OK. Similarly, "the second threshold is used to determine whether the signal quality of the target cell has improved", that is, when the signal quality of the target cell is greater than or equal to the second threshold, it means that the signal quality of the target cell is gradually improving. This is because, in a high-speed scenario, if the serving cell is determined to be less than the fourth threshold at the current moment and the target cell is greater than the second threshold, due to the high-speed scenario, the moving speed of the terminal device is too fast, it can be predicted that the quality of the serving cell will be worse at the next moment, and the quality of the target cell will be very good, so the terminal device triggers early switching, which can just make up for the problem that the measured parameters determined in the high-speed scenario do not match the current actual position of the terminal. In contrast, according to the existing scheme, the switching process will be triggered only when the signal quality of the target cell is greater than the signal quality of the serving cell and reaches a certain threshold. In the high-speed scenario, according to this scheme, the switching time of the terminal device will be late, so that the user's service experience cannot be guaranteed.

[0009] In the present application, "the absolute value of the difference between the signal strength of the serving cell and the signal strength of the target cell is less than or equal to the third threshold" can predict that the signal strength between the target cell and the serving cell is not much different, or it can also reflect that the signal quality of the target cell has a trend of improving.

[0010] For example, the second threshold is less than or equal to the fourth threshold.

[0011] Specifically, the above technical solution has the following three implementation methods:

[0012] Method A: When the terminal device determines that the signal quality of the service cell is greater than the first threshold and less than or equal to the fourth threshold, and the terminal device determines that the signal quality of the target cell is greater than or equal to the second threshold, a first message is sent to the network device.

[0013] Method B: When the terminal device determines that the signal quality of the service cell is greater than the first threshold and less than or equal to the fourth threshold, and the terminal device determines that the absolute value between the signal strength of the service cell and the signal strength of the target cell is less than or equal to the third threshold, a first message is sent to the network device.

[0014] Method C: When the terminal device determines that the signal quality of the service cell is greater than the first threshold and less than or equal to the fourth threshold, and the terminal device determines that the signal quality of the target cell is greater than or equal to the second threshold, and the terminal device determines that the absolute value between the signal strength of the service cell and the signal strength of the target cell is less than or equal to the third threshold, a first message is sent to the network device.

[0015] Based on the above technical solution, this application proposes that when it is determined that the signal quality of the service cell is poor, and the signal quality of the target cell tends to improve, the terminal device can initiate a switching request to the network device, thereby ensuring the user's service experience as much as possible and minimizing the impact of the switching on the user's service.

[0016] In combination with the first aspect, in a possible implementation, the signal quality of the serving cell may be a signal-to-noise ratio (SNR) of a demodulation reference signal (DMRS) of a physical downlink shared channel (PDSCH) of the serving cell. For another example, the signal quality of the serving cell may be a PDSCH DMRS SINR of the serving cell.

[0017] It should be understood that, under normal circumstances, by measuring the RSRP of the serving cell, only the signal quality of the serving cell can be roughly determined, but the signal quality actually received by each terminal device in the serving cell cannot be accurately determined. This is because RSRP is equivalent to the wide beam sent by the cell, but the signals actually received by each terminal device in the cell are not exactly the same. Therefore, the present application proposes that by measuring the PDSCH DMRS SNR, the signal quality actually received by each terminal device in the current serving cell can be accurately determined, and the current signal reception quality of each terminal device can be more accurately determined, and the terminal device can be assisted to determine whether it is necessary to request a switch to the target cell from the network device. In addition, considering that if there are some interference signals near or around the terminal device, the signal reception quality of the terminal device in the serving cell will also be poor, therefore, the present application proposes to determine the actual signal reception quality of the terminal device more accurately by judging the "signal-to-noise ratio". It can also be understood that in the present application, by introducing the PDSCH DMRS SNR, compared with the existing solution of directly determining the RSRP of the serving cell, the actual signal reception quality of each terminal device in the serving cell can be more accurately known, thereby assisting the terminal device in determining whether it is necessary to apply to the network device to switch to the target cell.

[0018] In combination with the first aspect, in a possible implementation method, the measurement result of the PDSCH DMRS SNR of the serving cell and the timestamp of measuring the PDSCH DMRS SNR are determined; the signal quality of the serving cell is determined to be greater than a first threshold and less than or equal to a fourth threshold, including: determining that the timestamp is valid and the PDSCH DMRS SNR of the serving cell is greater than the first threshold and less than or equal to the fourth threshold.

[0019] In this application, it is proposed that the PDSCH DMRS SNR of the serving cell can be determined. However, since the terminal device does not transmit data services in real time, each time the PDSCH DMRS SNR of the data channel is measured, a corresponding timestamp needs to be carried to help the terminal device determine whether the measured value is the most recent measurement value. If it is a measurement value of the terminal device a long time ago, the measurement result has no reference value. Therefore, this application proposes that the timestamp of the measured PDSCH DMRS SNR can be used to determine whether the measured PDSCH DMRS SNR is the most recent measurement value and whether it has reference value.

[0020] In combination with the first aspect, in a possible implementation, the signal quality of the target cell may be a signal to interference plus noise ratio (SINR) of a synchronization signal block (synchronization signal and PBCH block, SSB) of the target cell. For another example, the signal quality of the target cell may be an SSB SNR of the target cell.

[0021] It should be noted that the PDSCH DMRS SNR (or the PDSCH DMRS SINR of the target cell) of the target cell cannot be known before switching (because data services have not been transmitted on the target cell). Therefore, the present application proposes that the SSB SINR of the target cell can be determined to try to know the degree of signal interference of the target cell, thereby assisting the terminal device to more accurately judge the signal quality of the target cell.

[0022] With reference to the first aspect, in a possible implementation manner, the first message is a measurement report MeasurementReport message.

[0023] In combination with the first aspect, in a possible implementation method, the second message is a radio resource control resource reconfiguration RRCRecfguration message, and the resource reconfiguration message is used to configure one or more of the following contents for the terminal device: configuration of the radio bearer of the terminal device in the target cell, configuration of the terminal device measurement, configuration of the target cell or target cell group.

[0024] In a second aspect, a cell switching method is provided, which may be executed by a terminal device, or may also be executed by a component of the terminal device (eg, a chip or a circuit), without limitation.

[0025] The method includes: determining that the signal quality of a service cell is less than or equal to a first threshold, wherein the first threshold is less than a fourth threshold, and the fourth threshold is used to determine whether the signal quality of the service cell has deteriorated, and; determining that the signal quality of a target cell is greater than or equal to a fifth threshold, wherein the fifth threshold is used to determine whether the signal quality of the target cell has improved, and / or determining that the absolute value of the difference between the signal strength of the service cell and the signal strength of the target cell is less than or equal to a sixth threshold, and the sixth threshold is greater than or equal to 0; sending a first message to a network device, the first message being used to request triggering switching to the target cell; and receiving a second message from the network device, the second message being used to instruct a terminal device to switch to the target cell.

[0026] In this application, when the signal quality of the serving cell is less than or equal to the first threshold, it means that the signal of the serving cell has become very poor. Therefore, in this technical solution, the fifth threshold is less than the second threshold, and the sixth threshold is greater than the third threshold. It can also be understood that the signal quality of the serving cell is too poor, and the latter two conditions are more relaxed than the solution provided in the first aspect, and the terminal device can easily trigger early switching. In comparison, in the first aspect, the quality of the serving cell is not too bad, so the latter two conditions are more stringent, and the terminal device is not easy to trigger early switching.

[0027] Exemplarily, the fifth threshold is smaller than the fourth threshold.

[0028] Specifically, the above technical solution has the following three implementation methods:

[0029] Method A: When the terminal device determines that the signal quality of the serving cell is less than or equal to the first threshold, and the terminal device determines that the signal quality of the target cell is greater than or equal to the fifth threshold, a first message is sent to the network device.

[0030] Method B: When the terminal device determines that the signal quality of the service cell is less than or equal to the first threshold, and the terminal device determines that the absolute value between the signal strength of the service cell and the signal strength of the target cell is less than or equal to the sixth threshold, a first message is sent to the network device.

[0031] Method C: When the terminal device determines that the signal quality of the service cell is less than or equal to the first threshold, and the terminal device determines that the signal quality of the target cell is greater than or equal to the fifth threshold, and the terminal device determines that the absolute value between the signal strength of the service cell and the signal strength of the target cell is less than or equal to the sixth threshold, a first message is sent to the network device.

[0032] Based on the above technical solution, this application proposes that when it is determined that the signal quality of the service cell is poor, and the signal quality of the target cell tends to improve, the terminal device can initiate a switching request to the network device, thereby ensuring the user's service experience as much as possible and minimizing the impact of the switching on the user's service.

[0033] In combination with the second aspect, in a possible implementation method, it is determined that the signal quality of the service cell is less than or equal to a first threshold, wherein the first threshold is less than a fourth threshold, and the fourth threshold is used to determine whether the signal quality of the service cell has deteriorated, and; it is determined that the signal quality of the target cell is greater than or equal to a fifth threshold, wherein the fifth threshold is less than the fourth threshold, and / or it is determined that the absolute value of the difference between the signal strength of the service cell and the signal strength of the target cell is less than or equal to a sixth threshold, and the sixth threshold is greater than or equal to 0; a first message is sent to a network device, and the first message is used to request to trigger switching to the target cell; a second message from the network device is received, and the second message is used to instruct the terminal device to switch to the target cell.

[0034] In conjunction with the second aspect, in a possible implementation, the signal quality of the serving cell includes a demodulation reference signal noise ratio (PDSCH DMRS SNR) of a physical downlink shared channel of the serving cell. For another example, the signal quality of the serving cell includes a PDSCH DMRS SINR of the serving cell.

[0035] In combination with the second aspect, in a possible implementation, the method also includes: determining the measurement result of the PDSCH DMRS SNR of the serving cell and the timestamp of measuring the PDSCH DMRS SNR; determining that the signal quality of the serving cell is less than or equal to a first threshold, including: determining that the timestamp is valid and the PDSCH DMRS SNR of the serving cell is less than or equal to the first threshold.

[0036] In conjunction with the second aspect, in a possible implementation, the signal quality of the target cell includes a signal to interference plus noise ratio SSB SINR of a synchronization signal block of the target cell. For another example, the signal quality of the target cell includes an SSB SNR of the target cell.

[0037] In combination with the second aspect, in a possible implementation manner, the first message is a measurement report MeasurementReport message.

[0038] In combination with the second aspect, in a possible implementation method, the second message is a radio resource control resource reconfiguration RRCRecfguration message, and the resource reconfiguration message is used to configure one or more of the following contents for the terminal device: the radio bearer configuration of the terminal device in the target cell, the measurement configuration of the terminal device, and the configuration of the target cell or the target cell group.

[0039] In a third aspect, the present application proposes a communication device, which is used to execute the method of the first aspect or the second aspect. Specifically, the device may include a unit and / or module, such as a transceiver unit and / or a processing unit, for executing the cell switching method proposed in the present application.

[0040] In a fourth aspect, a communication device is provided, the device comprising: at least one processor, configured to execute a computer program or instruction stored in a memory to perform the method of the first aspect or the second aspect. Optionally, the device further comprises a memory, configured to store a computer program or instruction. Optionally, the device further comprises a communication interface, and the processor reads the computer program or instruction stored in the memory through the communication interface.

[0041] In one implementation, the device is a functional communication device for implementing the cell switching method provided in the present application in a chip.

[0042] In another implementation, the device is a functional chip, chip system or circuit for implementing the cell switching method provided in the present application in a chip.

[0043] In a fifth aspect, the present application provides a processor, comprising: an input circuit, an output circuit, and a processing circuit. The processing circuit is used to receive a signal through the input circuit and transmit a signal through the output circuit, so that the processor executes the method of the first aspect or the second aspect.

[0044] In the specific implementation process, the processor can be one or more chips, the input circuit can be an input pin, the output circuit can be an output pin, and the processing circuit can be a transistor, a gate circuit, a trigger, and various logic circuits. The input signal received by the input circuit can be received and input by, for example, but not limited to, a transceiver, and the signal output by the output circuit can be, for example, but not limited to, output to a transmitter and transmitted by the transmitter, and the input circuit and the output circuit can be the same circuit, which is used as an input circuit and an output circuit at different times. The embodiments of the present application do not limit the specific implementation methods of the processor and various circuits.

[0045] For the operations such as sending and acquiring / receiving involved in the processor, unless otherwise specified, or unless they conflict with their actual function or internal logic in the relevant description, they can be understood as operations such as processor output, reception, input, etc., or as sending and receiving operations performed by the radio frequency circuit and antenna, and this application does not limit this.

[0046] In a sixth aspect, a processing device is provided, comprising a processor and a memory. The processor is used to read instructions stored in the memory, and can receive signals through a transceiver and transmit signals through a transmitter to execute the method of the first aspect or the second aspect.

[0047] Optionally, the number of the processors is one or more, and the number of the memories is one or more.

[0048] Optionally, the memory may be integrated with the processor, or the memory may be provided separately from the processor.

[0049] In the specific implementation process, the memory can be a non-transitory memory, such as a read-only memory (ROM), which can be integrated with the processor on the same chip or can be set on different chips respectively. The embodiments of the present application do not limit the type of memory and the setting method of the memory and the processor.

[0050] It should be understood that the related data interaction process, such as sending indication information, can be a process of outputting indication information from the processor, and receiving capability information can be a process of receiving input capability information by the processor. Specifically, the data output by the processor can be output to the transmitter, and the input data received by the processor can come from the transceiver. Among them, the transmitter and the transceiver can be collectively referred to as a transceiver.

[0051] The processing device in the sixth aspect may be one or more chips. The processor in the processing device may be implemented by hardware or by software. When implemented by hardware, the processor may be a logic circuit, an integrated circuit, etc.; when implemented by software, the processor may be a general-purpose processor implemented by reading software code stored in a memory, which may be integrated in the processor or located outside the processor and exist independently.

[0052] In a seventh aspect, a computer-readable storage medium is provided, which stores a program code for execution by a device, wherein the program code includes a method for executing the first aspect or the second aspect.

[0053] In an eighth aspect, a computer program product comprising instructions is provided, which, when executed on a computer, enables the computer to execute the method of the first aspect or the second aspect.

[0054] In a ninth aspect, a chip system is provided, comprising a processor for calling and running a computer program from a memory, so that a device equipped with the chip system executes the method of the first or second aspect above.

[0055] In a tenth aspect, a communication system is provided, the communication system comprising a terminal device and a network device. The terminal device is used to execute any possible implementation method in the first aspect, or. The terminal device is used to execute any possible implementation method in the second aspect, BRIEF DESCRIPTION OF THE DRAWINGS

[0056] Figure 1 This is a schematic diagram of a scenario to which this application is applicable.

[0057] Figure 2 It is a schematic flow chart of a cell switching method 200 provided in the present application.

[0058] Figure 3 It is another schematic flowchart of a cell switching method provided by the present application.

[0059] Figure 4 These are the simulation results provided by this application and the simulation results of the existing solutions.

[0060] Figure 5 This is another simulation result provided by this application and a simulation result of the existing solution.

[0061] Figure 6 It is a schematic block diagram of the communication device 100 provided in this application.

[0062] Figure 7 It is a schematic block diagram of the communication device 200 provided in this application. DETAILED DESCRIPTION

[0063] The technical solution in this application will be described below in conjunction with the accompanying drawings.

[0064] The wireless communication systems to which the embodiments of the present application can be applied include, but are not limited to: global system of mobile communication (GSM) system, long term evolution (LTE) frequency division duplex (FDD) system, LTE time division duplex (TDD), LTE system, advanced long term evolution (LTE-Advanced, LTE-A) system, next generation communication system (for example, 6G communication system), a fusion system of multiple access systems, or an evolution system.

[0065] The technical solution provided in the present application can also be applied to machine type communication (MTC), long term evolution-machine (LTE-M), device to device (D2D) network, machine to machine (M2M) network, Internet of things (IoT) network or other networks. Among them, IoT network can include vehicle networking, for example. Among them, the communication mode in the vehicle networking 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 (V2P) communication or vehicle to network (V2N) communication, etc.

[0066] The terminal device in this application may also be referred to as a terminal, user equipment (UE), mobile station, mobile terminal, etc. The terminal can be widely used in various scenarios, for example, device-to-device (D2D), vehicle to everything (V2X) communication, machine-type communication (MTC), Internet of Things (IOT), virtual reality, augmented reality, industrial control, automatic driving, telemedicine, smart grid, smart furniture, smart office, smart wear, smart transportation, smart city, etc. The terminal can be a mobile phone, a tablet computer, a computer with wireless transceiver function, a wearable device, a vehicle, a drone, a helicopter, an airplane, a ship, a robot, a mechanical arm, a smart home device, etc. The embodiments of this application do not limit the specific technology and specific device form adopted by the terminal.

[0067] The network device in the present application can be a wireless access network device, for example, a base station, an evolved NodeB (eNodeB), a transmission reception point (TRP), a next generation base station (next generationNodeB, gNB) in a fifth generation (5G) mobile communication system, a next generation base station in a sixth generation (6G) mobile communication system, a base station in a future mobile communication system, or an access node in a WiFi system, etc.; it can also be a module or unit that completes part of the functions of a base station, for example, it can be a centralized unit (central unit, CU) or a distributed unit (distributed unit, DU). The CU here completes the functions of the radio resource control protocol and the packet data convergence layer protocol (PDCP) of the base station, and can also complete the function of the service data adaptation protocol (SDAP); the DU completes the functions of the radio link control layer and the medium access control (MAC) layer of the base station, and can also complete the functions of part of the physical layer or all of the physical layer. For the specific description of the above-mentioned various protocol layers, please refer to the relevant technical specifications of the third generation partnership project (3GPP). The wireless access network device can be a macro base station, a micro base station or an indoor station, a relay node or a donor node, etc. The embodiments of the present application do not limit the specific technology and specific device form adopted by the wireless access network device. For the convenience of description, the following description takes the base station as an example of the wireless access network device.

[0068] For example, base stations and terminals, base stations and base stations, and terminals and terminals can communicate through authorized spectrum, unauthorized spectrum, or both; can communicate through spectrum below 6 gigahertz (GHz), spectrum above 6 GHz, or spectrum below 6 GHz and spectrum above 6 GHz at the same time. The embodiments of the present application do not limit the spectrum resources used for wireless communication.

[0069] At present, the terminal device can measure the signal quality of the reference signal receiving power (RSRP) of the target cell and the signal quality of the RSRP of the current serving cell. When the difference between the signal quality of the RSRP of the target cell and the signal quality of the RSRP of the current serving cell is greater than a certain threshold, the network device will trigger the terminal device to switch to the target cell. According to the existing scheme, as long as the difference between the signal quality of the RSRP of the target cell and the signal quality of the RSRP of the current serving cell does not meet a certain threshold, the terminal device cannot trigger the switch. This scheme is mainly considered to ensure the user's service experience after the terminal device is switched, but it ignores the poor signal quality that the terminal device needs to suffer in the current serving cell before the switch. In other words, the existing scheme ignores the problem of poor user service experience in the period before the switch.

[0070] Figure 1 A scenario to which the present application is applicable is shown. Assuming that in a high-speed mobile scenario (for example, a high-speed rail scenario), the user's moving speed is very fast. According to the existing scheme, for example, when the switching condition mentioned above is met, the signal quality of the service cell may be so poor that even if the measurement report of the service cell is sent to the network device, the network device cannot receive it, resulting in a switching failure. For another example, the data signal quality of the current service cell is actually very poor, but the RSRP signal quality of the service cell is not bad enough to meet the condition, resulting in the data transmission rate of the current service cell dropping to the bottom and the user experience being extremely poor.

[0071] In view of this, the present application proposes a cell switching method, which proposes that when it is determined that the signal quality of the serving cell is poor, and the signal quality of the target cell tends to improve, the terminal device can initiate a switching request to the network device, thereby ensuring the user's service experience as much as possible and minimizing the impact of the switching on the user's service.

[0072] Figure 2 is a schematic flow chart of a cell switching method 200 provided in the present application, the method comprising:

[0073] Method 1

[0074] 210. The terminal device determines that the signal quality of the serving cell is greater than the first threshold and less than or equal to the fourth threshold, and the signal quality of the target cell is greater than or equal to the second threshold, and / or the absolute value of the difference between the signal quality of the serving cell and the signal quality of the target cell is less than or equal to the third threshold, and sends a first message to the network device, where the first message is used to request triggering switching to the target cell.

[0075] Correspondingly, the network device receives the first message from the terminal device.

[0076] In the present application, the fourth threshold is used to determine whether the signal quality of the service cell has deteriorated. It can also be understood that when the signal quality of the service cell is less than or equal to the fourth threshold, it means that the signal quality of the service cell has deteriorated, and when the signal quality of the service cell is greater than the fourth threshold, it means that the signal quality of the current service cell is OK. Similarly, the second threshold is used to determine whether the signal quality of the target cell has improved. It can also be understood that when the signal quality of the target cell is greater than or equal to the second threshold, it means that the signal quality of the target cell is gradually improving.

[0077] This is because, in a high-speed scenario, if the current judgment of the serving cell is less than the fourth threshold and the target cell is greater than the second threshold, since the terminal device moves too fast in the high-speed scenario, it can be predicted that the quality of the serving cell will be worse at the next moment and the quality of the target cell will be very good. Therefore, the terminal device triggers early switching to make up for the problem that the measured parameters and the current actual location of the terminal do not match each other in the high-speed scenario. In contrast, according to the existing solution, the switching process is triggered only when the signal quality of the target cell is greater than the signal quality of the serving cell and reaches a certain threshold. In the high-speed scenario, the switching time of the terminal device will be late, making the user's service experience unable to be guaranteed.

[0078] In the present application, "the absolute value of the difference between the signal strength of the serving cell and the signal strength of the target cell is less than or equal to the third threshold" can predict that the signal strength between the target cell and the serving cell is not much different, or it can also reflect that the signal quality of the target cell has a trend of improving.

[0079] Exemplarily, the second threshold is smaller than the fourth threshold.

[0080] Method 2

[0081] 210. The terminal device determines that the signal quality of the serving cell is less than or equal to the first threshold, and the signal quality of the target cell is greater than or equal to the fifth threshold, and / or the absolute value of the difference between the signal quality of the serving cell and the signal quality of the target cell is less than or equal to the sixth threshold, and sends a first message to the network device, where the first message is used to request triggering switching to the target cell.

[0082] In the present application, the first threshold is less than the fourth threshold, and the fourth threshold is used to determine whether the signal quality of the serving cell has deteriorated. The fifth threshold is used to determine whether the signal quality of the target cell has improved. Exemplarily, the fifth threshold is less than the fourth threshold.

[0083] In this application, when the signal quality of the serving cell is less than or equal to the first threshold, it means that the signal of the serving cell has become very poor, so in mode 2, the fifth threshold is less than the second threshold in mode 1, and the sixth threshold is greater than the third threshold in mode 2. It can also be understood that the signal quality of the serving cell is too poor, so the latter two conditions are looser than the solution provided in mode 1, and the terminal device can easily trigger early switching. In comparison, in mode 1, the quality of the serving cell is not too bad, so the latter two conditions are stricter, and the terminal device is not easy to trigger early switching.

[0084] Exemplarily, the first message may be a measurement report, and the measurement report carries the measurement result.

[0085] For example, in a possible implementation, the signal quality of the serving cell may be the RSRP of the serving cell.

[0086] For example, in another possible implementation, the signal quality of the serving cell may be a signal-to-noise ratio (SNR) of a demodulation reference signal (DMRS) of a physical downlink shared channel (PDSCH) of the serving cell. For example, in a possible implementation, the signal quality of the serving cell may be a PDSCH DMRS SNR of the serving cell. In the present application, the PDSCH DMRS SNR is mainly used as an example for illustration.

[0087] It should be understood that, under normal circumstances, by measuring the RSRP of the service cell, only the signal quality of the service cell can be roughly determined, but the signal quality actually received by each terminal device in the service cell cannot be accurately determined. This is because RSRP is equivalent to the wide beam sent by the cell, but the signals actually received by each terminal device in the cell are not exactly the same. Therefore, the present application proposes that by measuring the PDSCH DMRS SNR, the signal quality actually received by each terminal device in the current service cell can be accurately determined, and the current signal reception quality of each terminal device can be more accurately determined, assisting the terminal device in determining whether it is necessary to request the network device to switch to the target cell. In addition, considering that if there are some interference signals near or around the terminal device, the signal reception quality of the terminal device in the service cell will also be poor, therefore, the present application proposes that by judging the "signal-to-noise ratio", the actual current signal reception quality of the terminal device can be more accurately determined. It can also be understood that in the present application, by introducing PDSCH DMRS SNR (or, PDSCH DMRSSINR) compared with directly determining the RSRP of the serving cell in the existing scheme, the actual signal reception quality of each terminal device in the serving cell can be more accurately known, thereby assisting the terminal device in determining whether it needs to apply to the network device to switch to the target cell.

[0088] For example, in a possible implementation manner, the signal quality of the target cell may be the RSRP of the target cell.

[0089] For example, in another possible implementation, the signal quality of the target cell may be a signal to interference plus noise ratio (SINR) of a synchronization signal block (synchronization signal and PBCH block, SSB) of the target cell. For another example, the signal quality of the target cell may be an SSB SNR of the target cell. In this application, SSB SINR is mainly used as an example for illustration.

[0090] It should be noted that the PDSCH DMRS SNR of the target cell cannot be known before switching (because data services have not been transmitted on the target cell). Therefore, the present application proposes that the SSB SINR of the target cell can be determined to try to know the degree of signal interference in the target cell, thereby assisting the terminal device to more accurately judge the signal quality of the target cell.

[0091] The solution provided in the present application can be divided into the following three cases. The following takes the signal quality of the serving cell as PDSCH DMRS SNR and the signal quality of the target cell as SSB SINR as an example to specifically illustrate the solution provided in the present application.

[0092] Case 1:

[0093] In this application, if the terminal device determines that the PDSCH DMRS SNR of the serving cell is ≥ X dB, the handover can be performed according to the existing scheme. In other words, if the terminal device determines that the PDSCH DMRS SNR of the serving cell is ≥ X dB, it means that the signal quality of the serving cell is good, and the terminal device does not need to switch to the target cell.

[0094] In this application, the value of X can be flexibly designed by those skilled in the art according to actual conditions. For example, it is assumed that the value of X is 6dB; for example, it is assumed that the value of X is 3dB.

[0095] Case 2:

[0096] In the present application, if the terminal device determines that Z dB (i.e., the first threshold) ≤ PDSCH DMRS SNR of the serving cell ≤ YdB (i.e., the fourth threshold), and the SSB SINR of the target cell ≥ P dB (i.e., the second threshold), and / or, | RSRP of the target cell - RSRP of the serving cell | ≤ Q dB (i.e., the third threshold), the terminal device can directly send a first message to the network device to request to trigger switching to the target cell. This implementation method can also be understood as that the terminal device can trigger switching to the target cell in advance. In other words, the present application proposes that the terminal device can slightly promote switching in this implementation method.

[0097] In the present application, the values ​​of Z, Y, P, and Q can be flexibly designed by those skilled in the art according to actual conditions. For example, in case 2, it is assumed that the value of Z is 0dB, the value of Y is 6dB, the value of P is 3dB, and the value of Q is 3dB. For example, in case 2, it is assumed that the value of Z is -2dB, the value of Y is 4dB, the value of P is 3dB, and the value of Q is 2dB.

[0098] Case 3:

[0099] In the present application, if the terminal device determines that the PDSCH DMRS SNR of the serving cell is ≤Z dB (ie, the first threshold) and the SSB SINR of the target cell is ≥K dB (ie, the fifth threshold), and / or, | RSRP of the target cell - RSRP of the serving cell | ≤L dB (ie, the sixth threshold), the terminal device can directly send a first message to the network device to request a trigger to switch to the target cell. This implementation can also be understood as that the terminal device can trigger switching to the target cell in advance. In other words, the present application proposes that the terminal device can promote switching in this implementation.

[0100] It should be understood that the difference between "slightly promoting switching" and "promoting switching" mentioned in the present application is: depending on the range to which the PDSCH DMRS SNR of the currently measured service cell belongs, the threshold corresponding to the SSB SINR of the target cell, and / or the threshold corresponding to |RSRP of the target cell - RSRP of the service cell| are different. Specifically, as mentioned above, in case two, the signal quality of the service cell is not very bad, so the following two judgment conditions are more stringent, and it is not easy for the terminal device to trigger switching in advance, so it can be understood as slightly promoting switching; in case three, the signal quality of the service cell is too poor, so the following two judgment conditions are relatively loose, and the terminal device is more likely to trigger switching in advance, so it can be called promoting switching. Therefore, in the present application, the fifth threshold is less than the second threshold, and the sixth threshold is greater than the third threshold.

[0101] Exemplarily, in case 3, the value of K is 2 dB, and the value of L is 5 dB. Exemplarily, the value of K is 1 dB, and the value of L is 4 dB.

[0102] In the present application, through different judgment conditions and different thresholds corresponding to different judgment conditions, the terminal device can determine whether it is necessary to request the network device to trigger switching to the target cell. Specifically, by determining that the signal quality of the service cell is indeed poor (that is, the signal quality of the service cell is less than or equal to the first threshold), and the signal quality of the target cell does have a trend of improving (the signal quality of the target cell is greater than or equal to the second threshold, and / or the absolute value of the difference between the signal quality of the service cell and the signal quality of the target cell is less than or equal to the third threshold), the terminal device can request the network to trigger the cell switching process of the terminal device.

[0103] For example, Figure 3As shown, the demodulation module of the terminal device can calculate the PDSCH DMRS SNR of the service cell received by the antenna of the terminal device to generate a measurement result, and determine the timestamp corresponding to the measured PDSCH DMRS SNR. The measurement result and its corresponding timestamp are sent to the measurement module of the terminal device. After the measurement module receives the timestamp corresponding to the PDSCH DMRS SNR, it first calculates the timestamp within the cell switching time, and then determines whether the timestamp calculation value is valid. If the timestamp calculation value is within the aging time, it is determined that the PDSCH DMRS SNR measurement result is valid. At this time, the measurement module can send the PDSCH DMRS SNR measurement result to the radio resource control (RRC) module. If the measurement module determines that the timestamp calculation value exceeds the aging time, it means that the measurement result is a measurement value from a long time ago and cannot be used to determine the signal quality of the current data channel of the terminal device. It is invalid, and the PDSCH DMRS SNR measurement result will not be sent to the RRC module.

[0104] If the RRC module receives the PDSCH DMRS SNR measurement result, the terminal status judgment module can judge whether the terminal device needs to switch in advance according to the above three situations (it should be noted that the RSRP of the target cell and the RSRP of the serving cell are generally measured and reported to the RRC module by the terminal device in real time). For example, if the RRC module determines that the PDSCH DMRS SNR of the serving cell is ≥X dB, it emphasizes that there is no need to initiate a switching request in advance, and the switching can be performed according to the existing process. For another example, if the RRC module determines that Z dB (i.e., the first threshold) ≤ PDSCH DMRS SNR of the serving cell ≤Y dB (i.e., the fourth threshold), and the SSB SINR of the target cell ≥P dB (i.e., the second threshold), and | RSRP of the target cell - RSRP of the serving cell | ≤Q dB (i.e., the third threshold), the RRC module determines that the early triggering of the switching can be slightly promoted, and the terminal device can send a first message to the network device. For another example, if the RRC module determines that the PDSCH DMRS SNR of the serving cell is ≤Z dB (i.e., the first threshold) and the SSB SINR of the target cell is ≥P dB (i.e., the fifth threshold), and |RSRP of the target cell – RSRP of the serving cell| ≤Q dB (i.e., the sixth threshold), the RR module determines to promote early triggering of switching, and the terminal device can send a first message to the network device.

[0105] Exemplarily, the solution provided in the present application can be applied to high-speed mobile scenarios. On the one hand, considering that high-speed rail users reside in the new radio (NR) mode, when cell switching is performed based on SSB, the PDSCH DMRS SNR of the terminal equipment of low-speed users (in ordinary scenarios) will be reduced after switching compared with before switching. In high-speed scenarios, the PDSCH DMRS SNR of the terminal equipment will also be reduced after switching compared with before switching, but the probability of reduction in high-speed scenarios is higher than that in low-speed scenarios. For example, it may be reduced by 3% in low-speed scenarios and by 10% in high-speed scenarios. This is because, in high-speed mobile scenarios, the terminal device moves too fast, and the reported measurement results do not match the real-time position of the terminal device, resulting in the reported measurement results being inconsistent with the current actual position of the terminal device, and being unable to reflect the actual signal quality of the terminal device at the current position (including, the service cell and the target cell), which will lead to switching failures or rate drops, which will have a serious impact on the user experience. On the other hand, the present application takes into account that according to the existing scheme, the switching threshold is single. Due to some obstacles, the existing switching conditions are met at a certain moment, but at another moment when the obstacle is far away, the existing switching conditions may not be met. This may cause a ping-pong switching situation when the neighboring cell signal is close to the service cell, which may cause the user's network rate to fluctuate and the user experience will decrease.

[0106] However, according to the solution provided in the present application, the terminal device can request the network device to trigger switching to the target cell in advance based on the current judgment result, so that the terminal device can switch to the target cell in time without continuing to suffer from poor signal quality in the serving cell, thereby ensuring the user's service experience.

[0107] Specifically, the applicant conducted simulations according to the solution provided in this application. Figure 4 (a) shows that according to the existing scheme, when the PDSCH DMRS SNR of the serving cell is less than 10dB, a handover is initiated. After the handover, the PDSCH DMRS SNR in the target cell is reduced by about 18.18% compared with the PDSCH DMRS SNR in the original serving cell (the principle is: the proportion of samples with a vertical axis less than "0dB" in all samples is counted). Figure 4 (b) shows that according to the solution provided by the present application, when the PDSCH DMRS SNR of the serving cell is less than 10dB, a handover is initiated. After the handover, the PDSCH DMRS SNR in the target cell is reduced by about 11.78% compared with the PDSCH DMRS SNR in the original serving cell. Figure 4 In (b), the samples with the vertical axis less than "0dB" are Figure 4 It is sparser than (a).

[0108] Figure 5 (a) shows that according to the existing solution, when the PDSCH DMRS SNR of the serving cell is less than 6 dB, a handover is initiated, and after the handover, the PDSCH DMRS SNR in the target cell decreases by about 4.76% compared with the PDSCH DMRS SNR in the original serving cell. Figure 5 (b) shows that according to the solution provided by the present application, when the PDSCH DMRS SNR of the serving cell is less than 6dB, a handover is initiated. After the handover, the PDSCH DMRS SNR in the target cell is reduced by about 2% compared with the PDSCH DMRS SNR in the original serving cell. It can be seen intuitively that Figure 5 In (b), there are only two samples whose vertical axis is less than "0dB". Figure 5 In (a), there are six samples whose vertical axis is less than "0dB".

[0109] Exemplarily, the solution provided by the present application can also be applied to non-high-speed mobile scenarios, such as NR weak signals, or scenarios where the signal is interfered. For example, when the switching conditions mentioned above are met, the signal quality of the serving cell may be so poor that even if the measurement report of the serving cell is sent to the network device, the network device cannot receive it, resulting in a switching failure; for another example, the data signal quality of the current serving cell is actually very poor, but the RSRP signal quality of the serving cell is not bad enough to meet the conditions, resulting in the data transmission rate of the current serving cell dropping to the bottom, and the user experience is extremely poor.

[0110] However, according to the solution provided in the present application, in the NR switching scenario, the terminal device can promote the triggering of cell switching in advance, optimize the switching success rate, and ensure stable service performance and user service experience by evaluating the PDSCH DMRS SNR measurement value of the current service cell, the SSB SINR of the target service cell, and the RSRP measurement value of the current service cell and the target service cell.

[0111] 220. The network device sends a second message to the terminal device, where the second message is used to indicate that the terminal device is allowed to switch to the target cell.

[0112] For example, the network device receives a first message and sends a second message to the terminal device, where the second message carries configuration information of the target cell.

[0113] Exemplarily, the second message may be a radio resource control resource reconfiguration "RRCRecfguration" message, which is used to configure resources on the target cell for the terminal device. Subsequently, the terminal device sends a third message to the network device, which indicates that the terminal device has completed resource configuration.

[0114] In the present application, the purpose of resource reconfiguration is to reconfigure the resources of a terminal device that has established an RRC connection, for example, including the establishment / modification / release of a radio bearer (RB), synchronization of executing reconfiguration, establishment / modification / release of measurements, establishment / modification / release of a secondary cell (SCell) and a cell group, and so on.

[0115] For example, the terminal device may send an "RRCRecfgurationComplete" message to the target cell, which is used to indicate that the terminal device has completed the resource configuration process. At this point, the terminal device may initiate a service normally on the target cell.

[0116] It can be understood that the term "and / or" in this article is only a description of the association relationship of the associated objects, indicating that there can be three relationships. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship.

[0117] Those skilled in the art should be aware that, in combination with the units and algorithm steps of each example described in the embodiments disclosed herein, the present application can be implemented in the form of hardware or a combination of hardware and computer software. Whether a function is performed in the form of hardware or computer software driving hardware depends on the specific application and design constraints of the technical solution. Professional and technical personnel can use different methods to implement the described functions for each specific application, but such implementation should not be considered to be beyond the scope of this application.

[0118] The embodiment of the present application can divide the functional modules of the communication device according to the above method example. For example, each functional module can be divided corresponding to each function, or two or more functions can be integrated into one processing module. The above integrated module can be implemented in the form of hardware or in the form of software functional modules. It should be noted that the division of modules in the embodiment of the present application is schematic and is only a logical function division. There may be other division methods in actual implementation. The following is an example of dividing each functional module corresponding to each function.

[0119] Figure 6 is a schematic block diagram of a communication device 100 provided in an embodiment of the present application. Figure 6 As shown, the communication device 100 may include: a processing unit 110 and a transceiver unit 120 .

[0120] The above-mentioned units are respectively used to execute the steps in the above-mentioned cell switching method 200, which will not be described in detail here.

[0121] It should also be understood that the communication device 100 herein is embodied in the form of functional units. The term "unit" herein may refer to an application specific integrated circuit (ASIC), an electronic circuit, a processor (e.g., a shared processor, a dedicated processor, or a group processor, etc.) and a memory for executing one or more software or firmware programs, a combined logic circuit, and / or other suitable components that support the described functionality.

[0122] The communication device 100 of each of the above schemes has the function of implementing the corresponding steps of the above method 200. The function can be implemented by hardware, or by hardware executing corresponding software. The hardware or software includes one or more modules corresponding to the above functions; for example, the determination unit can be replaced by a processor to respectively perform the transceiver operations and related processing operations in each method embodiment. In addition, the determination unit can be a processing circuit.

[0123] It should be pointed out that Figure 6 The communication device in the embodiment may be the communication device in the aforementioned method, or may be a chip or chip system of the communication device, such as a system on chip (SoC). The processing unit is a processor or microprocessor or integrated circuit integrated on the chip. This is not limited here.

[0124] Figure 7 1 is a schematic block diagram of another communication device 200 provided in an embodiment of the present application. As shown in the figure, the device 200 includes: at least one processor 210. The processor 210 is coupled to the memory and is used to execute instructions stored in the memory to send signals and / or receive signals. Optionally, the device 200 also includes a memory 230 for storing instructions. Optionally, the device 200 also includes a transceiver 220, and the processor 210 controls the transceiver 220 to send signals and / or receive signals.

[0125] It should be understood that the processor 210 and the memory 230 can be combined into one processing device, and the processor 210 is used to execute the program code stored in the memory 230 to implement the above functions. In specific implementation, the memory 230 can also be integrated into the processor 210, or independent of the processor 210.

[0126] It should also be understood that the transceiver 220 may include a transceiver (or receiver) and a transmitter (or transmitter). The transceiver may further include an antenna, and the number of antennas may be one or more. The transceiver 220 may also be a communication interface or an interface circuit.

[0127] Specifically, the processor 210 in the device 200 may correspond to the processing unit 110 in the communication device 100. The transceiver 220 in the device 200 may correspond to the sending unit 120 in the communication device 100.

[0128] As a solution, the communication device 200 is used to implement each step in the above method 200 embodiment.

[0129] For example, the processor 210 is used to execute the computer program or instructions stored in the memory 230 to implement each step in the above method 200.

[0130] According to the method provided in the embodiment of the present application, the present application also provides a computer program product, on which a computer program code is stored. When the computer program code is run on a computer, the computer executes each step in the embodiment of method 200.

[0131] According to the method provided in the embodiment of the present application, the present application also provides a computer-readable medium, which stores a program code. When the program code is executed on a computer, the computer executes each step in the above method 200.

[0132] The explanation of the relevant contents and beneficial effects of any of the above-mentioned devices can be referred to the corresponding method embodiments provided above, which will not be repeated here.

[0133] It should be understood that the specific process of each transceiver and processor executing the above corresponding steps has been described in detail in the above method embodiment, and for the sake of brevity, it will not be repeated here.

[0134] In the implementation process, each step of the above method can be completed by an integrated logic circuit of hardware in a processor or an instruction in the form of software. The steps of the method disclosed in conjunction with the embodiment of the present application can be directly embodied as a hardware processor for execution, or a combination of hardware and software modules in a processor for execution. The software module can be located in a storage medium mature in the art such as a random access memory, a flash memory, a read-only memory, a programmable read-only memory or an electrically erasable programmable memory, a register, etc. The storage medium is located in a memory, and the processor reads the information in the memory and completes the steps of the above method in conjunction with its hardware. To avoid repetition, it is not described in detail here.

[0135] It should be noted that the processor in the embodiment of the present application can be an integrated circuit chip with signal processing capabilities. In the implementation process, each step of the above method embodiment can be completed by the hardware integrated logic circuit or software instructions in the processor. The above processor can be a general processor, a digital signal processor (digitalsignal processor, DSP), an application-specific integrated circuit (application-specific integrated circuit, ASIC), a field-programmable gate array (field-programmable gate array, FPGA) or other programmable logic devices, discrete gates or transistor logic devices, discrete hardware components. The methods, steps and logic block diagrams disclosed in the embodiments of the present application can be implemented or executed. The general processor can be a microprocessor or the processor can also be any conventional processor, etc. The steps of the method disclosed in the embodiment of the present application can be directly embodied as a hardware decoding processor to perform, or the hardware and software modules in the decoding processor can be combined and performed. The software module can be located in a mature storage medium in the field such as a random access memory, a flash memory, a read-only memory, a programmable read-only memory or an electrically erasable programmable memory, a register, etc. The storage medium is located in the memory, and the processor reads the information in the memory and completes the steps of the above method in combination with its hardware.

[0136] In the above embodiments, it can be implemented in whole or in part by software, hardware, firmware or any combination thereof. When implemented using software, it can be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer instructions. When the computer instructions are loaded and executed on a computer, the process or function described in the embodiment of the present application is generated in whole or in part. The computer may be a general-purpose computer, a special-purpose computer, a computer network, or other programmable device. The computer instructions may be stored in a computer-readable storage medium, or transmitted from one computer-readable storage medium to another computer-readable storage medium, for example, the computer instructions may be transmitted from a website site, computer, server or data center by wired (e.g., coaxial cable, optical fiber, digital subscriber line (digital subscriber line, DSL)) or wireless (e.g., infrared, wireless, microwave, etc.) mode to another website site, computer, server or data center. The computer-readable storage medium may be any available medium that a computer can access or a data storage device such as a server or data center that includes one or more available media integrated. The available medium may be a magnetic medium (eg, a floppy disk, a hard disk, a magnetic tape), an optical medium (eg, a high-density digital video disc (DVD)), or a semiconductor medium (eg, a solid state disc (SSD)).

[0137] In the above-mentioned various device embodiments, the corresponding modules or units perform the corresponding steps. For example, the transceiver unit (transceiver) performs the steps of receiving or sending in the method embodiment, and other steps except sending and receiving can be performed by the processing unit (processor). The functions of the specific units can refer to the corresponding method embodiments. Among them, there can be one or more processors.

[0138] The terms "component", "module", "system", etc. used in this specification are used to represent computer-related entities, hardware, firmware, a combination of hardware and software, software, or software in execution. For example, a component can be, but is not limited to, a process running on a processor, a processor, an object, an executable file, an execution thread, a program and / or a computer. By way of illustration, both applications running on a communication device and a communication device can be components. One or more components can reside in a process and / or an execution thread, and a component can be located on a computer and / or distributed between two or more computers. In addition, these components can be executed from various computer-readable media having various data structures stored thereon. Components can, for example, communicate through local and / or remote processes according to signals having one or more data packets (e.g., data from two components interacting with another component between a local system, a distributed system and / or a network, such as the Internet interacting with other systems through signals).

[0139] Those of ordinary skill in the art will appreciate that the units and algorithm steps of each example described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. Professional and technical personnel can use different methods to implement the described functions for each specific application, but such implementation should not be considered to be beyond the scope of this application.

[0140] Those skilled in the art can clearly understand that, for the convenience and brevity of description, the specific working processes of the systems, devices and units described above can refer to the corresponding processes in the aforementioned method embodiments and will not be repeated here.

[0141] In the several embodiments provided in the present application, it should be understood that the disclosed systems, devices and methods can be implemented in other ways. For example, the device embodiments described above are only schematic. For example, the division of the units is only a logical function division. There may be other division methods in actual implementation, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, indirect coupling or communication connection of devices or units, which can be electrical, mechanical or other forms.

[0142] The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0143] In addition, each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit.

[0144] If the functions are implemented in the form of software functional units and sold or used as independent products, they can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present application can be essentially or partly embodied in the form of a software product that contributes to the prior art. The computer software product is stored in a storage medium and includes several instructions for a computer device (which can be a personal computer, a server, or a network device, etc.) to perform all or part of the steps of the methods described in the various embodiments of the present application. The aforementioned storage media include: various media that can store program codes, such as USB flash drives, mobile hard disks, read-only memories (ROM), random access memories (RAM), magnetic disks or optical disks.

[0145] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art who is familiar with the present technical field can easily think of changes or substitutions within the technical scope disclosed in the present application, which should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

Claims

1. A cell switching method, characterized in that: include: determining that the signal quality of the serving cell is greater than a first threshold and less than or equal to a fourth threshold, wherein the fourth threshold is used to determine whether the signal quality of the serving cell deteriorates, and; Determining that the signal quality of the target cell is greater than or equal to a second threshold, wherein the second threshold is used to determine whether the signal quality of the target cell has improved, and / or determining that the absolute value of the difference between the signal strength of the serving cell and the signal strength of the target cell is less than or equal to a third threshold, wherein the third threshold is greater than or equal to 0; Sending a first message to a network device, where the first message is used to request triggering handover to the target cell; A second message is received from the network device, where the second message is used to instruct the terminal device to switch to the target cell.

2. The method according to claim 1, characterized in that The signal quality of the serving cell includes a demodulation reference signal noise ratio (PDSCH DMRS SNR) of a physical downlink shared channel of the serving cell.

3. The method according to claim 2, characterized in that The method further comprises: Determine a measurement result of a PDSCH DMRS SNR of the serving cell and a timestamp for measuring the PDSCH DMRS SNR; The determining that the signal quality of the serving cell is greater than the first threshold and less than or equal to the fourth threshold includes: It is determined that the timestamp is valid, and that the PDSCH DMRS SNR of the serving cell is greater than a first threshold and less than or equal to a fourth threshold.

4. The method according to any one of claims 1 to 3, characterized in that The signal quality of the target cell includes a signal to interference plus noise ratio (SSB SINR) of a synchronization signal block of the target cell.

5. The method according to any one of claims 1 to 4, characterized in that The first message is a measurement report MeasurementReport message.

6. The method according to any one of claims 1 to 5, characterized in that The second message is a radio resource control resource reconfiguration RRCRecfguration message, and the resource reconfiguration message is used to configure one or more of the following contents for the terminal device: the configuration of the radio bearer of the terminal device in the target cell, the configuration of the terminal device measurement, and the configuration of the target cell or the target cell group.

7. A cell switching method, characterized in that: include: determining that the signal quality of the serving cell is less than or equal to a first threshold, wherein the first threshold is less than a fourth threshold, and the fourth threshold is used to determine whether the signal quality of the serving cell deteriorates, and; Determine that the signal quality of the target cell is greater than or equal to a fifth threshold, wherein the fifth threshold is used to determine whether the signal quality of the target cell improves, and / or determine that the absolute value of the difference between the signal strength of the serving cell and the signal strength of the target cell is less than or equal to a sixth threshold, and the sixth threshold is greater than or equal to 0; Sending a first message to a network device, where the first message is used to request triggering handover to the target cell; A second message is received from the network device, where the second message is used to instruct the terminal device to switch to the target cell.

8. The method according to claim 7, characterized in that The signal quality of the serving cell includes a demodulation reference signal noise ratio (PDSCH DMRS SNR) of a physical downlink shared channel of the serving cell.

9. The method according to claim 8, characterized in that The method further comprises: Determine a measurement result of a PDSCH DMRS SNR of the serving cell and a timestamp for measuring the PDSCH DMRS SNR; The determining that the signal quality of the serving cell is less than or equal to a first threshold comprises: It is determined that the timestamp is valid and that the PDSCH DMRS SNR of the serving cell is less than or equal to the first threshold.

10. The method according to any one of claims 7 to 9, characterized in that The signal quality of the target cell includes a signal to interference plus noise ratio (SSB SINR) of a synchronization signal block of the target cell.

11. The method according to any one of claims 7 to 10, characterized in that The first message is a measurement report MeasurementReport message.

12. The method according to any one of claims 7 to 11, characterized in that The second message is a radio resource control resource reconfiguration RRCRecfguration message, and the resource reconfiguration message is used to configure one or more of the following contents for the terminal device: the radio bearer configuration of the terminal device in the target cell, the measurement configuration of the terminal device, and the configuration of the target cell or the target cell group.

13. A communication device, characterized in that: include: Processing unit, transceiver unit, wherein, The processing unit is used to determine that the signal quality of the serving cell is greater than a first threshold and less than or equal to a fourth threshold, wherein the fourth threshold is used to determine whether the signal quality of the serving cell deteriorates, and; The processing unit is used to determine that the signal quality of the target cell is greater than or equal to a second threshold, wherein the second threshold is used to determine whether the signal quality of the target cell has improved, and / or determine that the absolute value of the difference between the signal strength of the serving cell and the signal strength of the target cell is less than or equal to a third threshold, wherein the third threshold is greater than or equal to 0; The transceiver unit is used to send a first message to the network device, where the first message is used to request triggering handover to the target cell; The processing unit is used to receive a second message from the network device, where the second message is used to instruct the communication device to switch to the target cell.

14. The communication device according to claim 13, characterized in that The signal quality of the serving cell includes a demodulation reference signal noise ratio (PDSCH DMRS SNR) of a physical downlink shared channel of the serving cell.

15. The communication device according to claim 14, characterized in that The processing unit is used to determine a measurement result of a PDSCH DMRS SNR of the serving cell and a timestamp of measuring the PDSCH DMRS SNR; The processing unit is used to determine that the signal quality of the serving cell is greater than a first threshold and less than or equal to a fourth threshold, including: The processing unit is used to determine that the timestamp is valid, and the PDSCH DMRS SNR of the serving cell is greater than a first threshold and less than or equal to a fourth threshold.

16. The communication device according to any one of claims 13 to 15, characterized in that: The signal quality of the target cell includes a signal to interference plus noise ratio (SSB SINR) of a synchronization signal block of the target cell.

17. The communication device according to any one of claims 13 to 16, characterized in that: The first message is a measurement report MeasurementReport message.

18. The communication device according to any one of claims 13 to 17, characterized in that: The second message is a radio resource control resource reconfiguration RRCRecfguration message, and the resource reconfiguration message is used to configure one or more of the following contents for the terminal device: the configuration of the radio bearer of the terminal device in the target cell, the configuration of the terminal device measurement, and the configuration of the target cell or the target cell group.

19. A communication device, characterized in that: include: Processing unit, transceiver unit, wherein, The processing unit is used to determine whether the signal quality of the serving cell is less than or equal to a first threshold, wherein the first threshold is less than a fourth threshold, and the fourth threshold is used to determine whether the signal quality of the serving cell deteriorates, and; The processing unit is used to determine that the signal quality of the target cell is greater than or equal to a fifth threshold, wherein the fifth threshold is used to determine whether the signal quality of the target cell has improved, and / or determine that the absolute value of the difference between the signal strength of the serving cell and the signal strength of the target cell is less than or equal to a sixth threshold, and the sixth threshold is greater than or equal to 0; The transceiver unit is used to send a first message to the network device, where the first message is used to request triggering handover to the target cell; The transceiver unit is used to receive a second message from the network device, where the second message is used to instruct the terminal device to switch to the target cell.

20. The communication device according to claim 19, characterized in that The signal quality of the serving cell includes a demodulation reference signal noise ratio (PDSCH DMRS SNR) of a physical downlink shared channel of the serving cell.

21. The communication device according to claim 20, characterized in that The processing unit is used to determine a measurement result of a PDSCH DMRS SNR of the serving cell and a timestamp of measuring the PDSCH DMRS SNR; The processing unit is used to determine that the signal quality of the serving cell is less than or equal to a first threshold, including: The processing unit is used to determine that the timestamp is valid and that the PDSCH DMRS SNR of the serving cell is less than or equal to a first threshold.

22. The communication device according to any one of claims 19 to 21, characterized in that: The signal quality of the target cell includes a signal to interference plus noise ratio (SSB SINR) of a synchronization signal block of the target cell.

23. The communication device according to any one of claims 19 to 22, characterized in that: The first message is a measurement report MeasurementReport message.

24. The communication device according to any one of claims 19 to 23, characterized in that: The second message is a radio resource control resource reconfiguration RRCRecfguration message, and the resource reconfiguration message is used to configure one or more of the following contents for the terminal device: the configuration of the radio bearer of the terminal device in the target cell, the configuration of the terminal device measurement, and the configuration of the target cell or the target cell group.

25. A communication device, characterized in that: The invention comprises a processor and an interface circuit, wherein the interface circuit is used to receive a signal from other communication devices outside the communication device and transmit it to the processor or send the signal from the processor to other communication devices outside the communication device, and the processor is used to implement the method as described in any one of claims 1 to 6 through a logic circuit or by executing code instructions, or the processor is used to implement the method as described in any one of claims 7 to 12 through a logic circuit or by executing code instructions.

26. A communication device, characterized in that: include: A processor, the processor is coupled to a memory, the memory is used to store instructions, when the instructions are executed by the processor, the communication device executes the method as described in any one of claims 1 to 6, or the communication device executes the method as described in any one of claims 7 to 12.

27. A computer-readable storage medium, characterized in that: The storage medium stores instructions, and when the instructions are executed by the communication device, the method according to any one of claims 1 to 6 is implemented, or the method according to any one of claims 7 to 12 is implemented.

28. A computer program product, characterized in that When the method is executed on a computer, the computer is enabled to execute the method according to any one of claims 1 to 6, or to implement the method according to any one of claims 7 to 12.

29. A communication system, characterized in that: The method comprises at least one communication device and a network device for executing the method according to any one of claims 1 to 6, or comprises at least one communication device and a network device for executing the method according to any one of claims 7 to 12.

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