CN116709443A - Network selection method, device and storage medium - Google Patents

Abstract

Embodiments of the present application provide a network selection method, device, and storage medium. The method includes: a terminal device resides in a first cell; the terminal device acquires information on N cells; the terminal device obtains M cell combinations among the N cells based on the frequency band combination capability information of the terminal device; the terminal device obtains M cell combinations based on the M cell combinations According to the information of each cell in the M cell combinations, the target cell combination whose combined network rate value meets the preset conditions is obtained; when the target cell combination includes the second cell and the third cell, the terminal device switches from the first cell to the second cell. Cell: when the bandwidth of the terminal device in the second cell does not meet the service requirements, add a third cell for the terminal device. In this way, after the terminal device accesses the second cell and the third cell, the target cell combination can provide the terminal device with a higher combined network rate value, so as to increase the data transmission rate of the terminal device.

Description

Network selection method, device and storage medium

technical field

The present application relates to the technical field of terminals, in particular to a network selection method, device and storage medium.

Background technique

With the development of mobile communication technology, mobile communication networks are widely used in the field of communication. The terminal equipment can support different network standards of the communication network. The network standards include but are not limited to GSM (global system for mobile communication, global system for mobile communication, 2G), TD-SCDMA (time division-synchronous code division multiple access, time division-synchronous code division multiple access) address, 3G), LTE (long term evolution, long-term evolution, 4G) and NR (new radio, new wireless, 5G), etc.

The number of mobile terminal users continues to increase, and the service requirements of the terminal users also increase accordingly. Carrier aggregation (carrier aggregation, CA) and dual connectivity (evolved nodeB dual connectivity, ENDC) technologies can increase the transmission bandwidth of the mobile network to a certain extent, and increase the network transmission rate and network capacity. Among them, CA technology can aggregate multiple continuous or discontinuous Component Carriers (CCs) to obtain greater transmission bandwidth; ENDC technology can support terminal devices to access 4G networks and 5G networks at the same time to increase network speed.

In a possible implementation, the terminal device can preferentially camp on the primary cell with the best signal strength during the network activation process, and add secondary cells to form a CA combination or ENDC combination to increase the data transmission rate of the mobile phone. In some cases, after the terminal device camps on the main cell with the best signal strength, the data transmission rate of the terminal device may not be high, which affects the operation of services in the terminal device.

Contents of the invention

Embodiments of the present application provide a network selection method, device, and storage medium, which are applied in the field of terminal technology. By calculating the combined network rate values of multiple cell combinations, the target cell combination with the largest combined network rate value is obtained, and the terminal device resides in On the cells of the target cell combination, a higher network rate can be obtained.

In a first aspect, the embodiment of the present application proposes a network selection method. The method includes: a terminal device resides in a first cell; the terminal device acquires information on N cells; the terminal device obtains M cell combinations among the N cells based on the frequency band combination capability information of the terminal device; the terminal device obtains M cell combinations based on the M cell combinations According to the information of each cell in the M cell combinations, the target cell combination whose combined network rate value meets the preset conditions is obtained; when the target cell combination includes the second cell and the third cell, the terminal device switches from the first cell to the second cell. Cell: when the bandwidth of the terminal device in the second cell does not meet the service requirements, add a third cell for the terminal device. In this way, after the terminal device accesses the second cell and the third cell, the target cell combination can provide the terminal device with a higher combined network rate value, so as to increase the data transmission rate of the terminal device.

In a possible implementation, the cell network rate value of any cell is obtained by the terminal device by querying the preset correspondence table based on one or more of the following related information of any cell: cell frequency band, modulation order Number of carriers, number of carriers, multiple-input multiple-output MIMO parameters, link direction, subcarrier spacing, bandwidth of a single carrier component CC or the number of carrier component CCs. In this way, the terminal device can accurately obtain the cell network rate value of any cell based on the table lookup.

In a possible implementation, based on the information of each cell in the M cell combinations, the terminal device obtains a target cell combination in which the combined network rate value of the M cell combinations satisfies a preset condition, including: the terminal device screens out the M cell combinations The cell combination whose cell signal strength is lower than the first threshold value in the cell combination obtains L cell combinations; the terminal device calculates the cell combination based on the cell signal strength of each cell in any cell combination and the cell network rate value of each cell The combined network rate value; the terminal device traverses the L cell combinations, and calculates the combined network rate values of the L cell combinations; the terminal device screens the combined network rate values of the L cell combinations to obtain a target cell combination that meets the preset conditions. In this way, the terminal device can obtain a combined network rate value based on the cell network rate values of multiple cells, and obtain a target cell combination satisfying a preset condition, thereby improving the accuracy of the calculation result.

In a possible implementation, the combined network rate value of any combination of cells satisfies the following conditions: Among them, R is the combined network rate value of the cell combination; n is the number of cells in the cell combination, P _i is the signal strength percentage of the i-th cell; R _i is the cell network rate value of the i-th cell. In this way, the terminal equipment can obtain the combined network rate value that the cell combination can provide under the current channel quality.

In a possible implementation manner, the target cell combination that satisfies the preset condition includes a cell combination corresponding to a maximum combined network rate value among the L cell combinations. In this way, the combined network rate value provided by the target cell combination for the terminal device can be increased.

In a possible implementation, before the terminal device camps on the first cell, the method further includes: the terminal device detects a network state change event; the network state change event includes at least one of the following: Airplane mode event or card insertion event. In this way, the terminal device recognizes different scenarios. When the network status changes, the terminal device uses the cells in the target cell combination as the primary cell and the secondary cell, and enters the network rate after the network is increased.

In a second aspect, the embodiment of the present application proposes a network selection method. The method includes: the base station instructs the terminal equipment to reside in the first cell; the base station acquires information on N cells; the base station sends the first signaling for querying frequency band combination capability information to the terminal equipment; the base station bases the frequency band combination capability on the basis of the terminal equipment The information is obtained from the N cells in M cell combinations; based on the information of each cell in the M cell combinations, the base station obtains the target cell combination in which the combined network rate value of the M cell combinations meets the preset conditions; when the target cell combination includes the first In the case of the second cell and the third cell, the base station instructs the terminal device to switch from the first cell to the second cell; when the bandwidth in the second cell does not meet the service requirements, the base station adds the third cell for the terminal device. In this way, after the terminal device accesses the second cell and the third cell, the target cell combination can provide the terminal device with a higher combined network rate value, so as to increase the data transmission rate of the terminal device. At the same time, the base station can provide greater computing power, thereby improving the efficiency of network presence.

In a possible implementation, the cell network rate value of any cell is obtained by the base station based on the following one or more related information of any cell by querying the preset correspondence table: cell frequency band, modulation order , number of carriers, multiple-input multiple-output MIMO parameters, link direction, subcarrier spacing, bandwidth of a single carrier component CC or the number of carrier component CCs. In this way, the cell network rate value of any cell can be accurately obtained based on the table lookup.

In a possible implementation, based on the information of each cell in the M cell combinations, the base station obtains a target cell combination in which the combined network rate value of the M cell combinations satisfies a preset condition, including: the base station screens out the M cell combinations The combination of cells whose signal strength is lower than the first threshold value is used to obtain L cell combinations; the base station calculates the combined network of the cell combination based on the cell signal strength of each cell in any cell combination and the cell network rate value of each cell Rate value; the base station traverses the L cell combinations, and calculates the combined network rate values of the L cell combinations; the base station screens the combined network rate values of the L cell combinations to obtain a target cell combination that meets the preset conditions. In this way, the base station can obtain a combined network rate value based on the cell network rate values of multiple cells, and obtain a target cell combination satisfying a preset condition, thereby improving the accuracy of the calculation result.

In a possible implementation, the combined network rate value in any combination of cells satisfies the following conditions: Among them, R is the combined network rate value of the cell combination; n is the number of cells in the cell combination, P _i is the signal strength percentage of the i-th cell; R _i is the cell network rate value of the i-th cell. In this way, the base station calculates the combined network rate value that the cell combination can provide under the current channel quality.

In a possible implementation manner, the target cell combination that satisfies the preset condition includes a cell combination corresponding to a maximum combined network rate value among the L cell combinations. In this way, the combined network rate value provided by the target cell combination for the terminal device can be increased.

In a possible implementation, before the base station instructs the terminal device to camp in the first cell, the method further includes: the base station receives a network state change event reported by the terminal device; the network state change event includes at least one of the following: the terminal Device power-on event, flight mode off event or card insertion event. In this way, the base station can identify different scenarios. When the network status changes, the base station instructs the terminal device to access the second cell and the third cell in the target cell combination, and enter the network rate after the network is increased.

In a third aspect, an embodiment of the present application provides a terminal device, which may also be referred to as a terminal (terminal), user equipment (user equipment, UE), mobile station (mobile station, MS), mobile terminal (mobile terminal, MT) )wait. The terminal device can be a mobile phone, a smart TV, a wearable device, a tablet computer (Pad), a computer with a wireless transceiver function, a virtual reality (virtual reality, VR) terminal device, an augmented reality (augmented reality, AR) terminal Equipment, wireless terminals in industrial control, wireless terminals in self-driving, wireless terminals in remote medical surgery, wireless terminals in smart grid, transportation Wireless terminals in transportation safety, wireless terminals in smart city, wireless terminals in smart home, etc.

The terminal device includes: a processor and a memory; the memory stores computer-executable instructions; the processor executes the computer-executable instructions stored in the memory, so that the terminal device executes the method according to the first aspect or the second aspect.

In a fourth aspect, the embodiment of the present application provides a computer-readable storage medium, where a computer program is stored in the computer-readable storage medium. When the computer program is executed by the processor, the method of the first aspect or the second aspect is realized.

In a fifth aspect, an embodiment of the present application provides a computer program product, the computer program product includes a computer program, and when the computer program is executed, the computer is made to perform the method of the first aspect or the second aspect.

In a sixth aspect, an embodiment of the present application provides a chip, the chip includes a processor, and the processor is used to call a computer program in a memory to execute the method according to the first aspect or the second aspect.

It should be understood that the third aspect to the sixth aspect of the present application correspond to the technical solutions of the first aspect or the second aspect of the present application, and the beneficial effects obtained in each aspect and the corresponding feasible implementation modes are similar, and will not be repeated here. .

Description of drawings

Fig. 1 is a schematic flow chart of a network selection method in a possible implementation;

FIG. 2 is a schematic diagram of a communication system provided by an embodiment of the present application;

FIG. 3 is a schematic structural diagram of a terminal device provided in an embodiment of the present application;

FIG. 4 is a schematic flow diagram of a network selection method provided in an embodiment of the present application;

FIG. 5 is a schematic flowchart of a network selection method provided in an embodiment of the present application;

FIG. 6 is a schematic flowchart of a network selection method provided in an embodiment of the present application;

FIG. 7 is a schematic flowchart of a network selection method provided in an embodiment of the present application;

FIG. 8 is a schematic structural diagram of a network selection device provided in an embodiment of the present application.

Detailed ways

In order to clearly describe the technical solutions of the embodiments of the present application, in the embodiments of the present application, words such as "exemplary" or "for example" are used as examples, illustrations or illustrations. Any embodiment or design described herein as "exemplary" or "for example" is not to be construed as preferred or advantageous over other embodiments or designs. Rather, the use of words such as "exemplary" or "such as" is intended to present related concepts in a concrete manner.

In the embodiments of the present application, "at least one" means one or more, and "multiple" means two or more. "And/or" describes the association relationship of associated objects, indicating that there may be three types of relationships, for example, A and/or B, which can mean: A exists alone, A and B exist at the same time, and B exists alone, where A, B can be singular or plural. The character "/" generally indicates that the contextual objects are an "or" relationship. "At least one of the following" or similar expressions refer to any combination of these items, including any combination of single or plural items. For example, at least one item (piece) of a, b, or c can represent: a, b, c, a-b, a-c, b-c, or a-b-c, where a, b, c can be single or multiple .

It should be noted that "at the time" in the embodiments of the present application may refer to the instant when a certain situation occurs, or within a period of time after a certain situation occurs, and this embodiment of the present application does not make specific limited. In addition, the display interface provided in the embodiment of the present application is only an example, and the display interface may include more or less content.

With the development of mobile communication technology, mobile communication networks are widely used in the field of communication. The terminal equipment can support different network standards of the communication network, and the network standards include but not limited to GSM, TD-SCDMA, LTE and NR.

The number of mobile terminal users continues to increase, and the service requirements of the terminal users also increase accordingly. CA technology and ENDC technology can increase the transmission bandwidth of the mobile network to a certain extent, improve the network transmission rate and network capacity. CA technology can aggregate multiple contiguous or discontinuous Component Carriers (CCs) to obtain greater transmission bandwidth; ENDC technology can support terminal devices to access 4G networks and 5G networks at the same time to increase network speed.

In a possible implementation, the process of activating a terminal device on the network can be shown in Figure 1. The terminal device can camp on a primary cell with high signal strength, and add a secondary cell to form a combination of CA and ENDC. Possible implementations can include the following The above steps:

S101. The terminal device detects a network state change event.

The network status change event is used to instruct the terminal equipment to perform cell search. For example, the network state change event may include a power-on event, an airplane mode off event, a card insertion event, and the like. After the terminal device detects a network state change event, it can perform cell search. The foregoing is only an example of a network state change event, and does not constitute a limitation on the event used to trigger the cell search. In the embodiment of the present application, other events may also be used to trigger the terminal to perform the cell search.

S102. The terminal device searches for a cell according to the channel quality, and camps on the primary cell.

After detecting a network state change event, the terminal device can perform a cell search process and a cell selection process. Among them, during the cell search process, the cell search can be performed according to the historical cell information of the terminal device before the network status change event. Perform full-band frequency scanning to obtain cell-related information, such as PIC (physical cell identities), SIB (system information, master information block) and MIB (system information, system information blocks), etc.

During the cell selection process, the terminal device may measure signal parameters of the cell, such as RSRP (reference signal receiving power) and/or RSRQ (reference signal receiving quality) and the like. When the signal parameters of the cell meet the camping conditions, the terminal device camps on the cell. When the terminal device selects the primary cell, the priority of the cell with high channel quality is higher than that of the cell with low channel quality. The cell may be the cell with the highest signal strength among the cells searched by the terminal device.

S103. The terminal device reports the UE capability based on the UE capability query message of the base station.

When the service load of the terminal device is heavy, the bandwidth of a single cell where it resides may not be sufficient to support the terminal device to perform network services. The base station can add secondary cells to the terminal equipment to form a CA combination or an ENDC combination to increase network bandwidth. The base station may deliver a UE capability enqiry (UE capability enqiry, also called UE capability enqiry) message to the terminal device. The capability of the terminal device is pre-configured on the terminal device. In response to the terminal device capability query message, the terminal device can query its configured capabilities and report a terminal device capability information (UE capability information, also called UE capability message) to the base station. The terminal device capability message may include: network frequency band information supported by the terminal device, for example, a frequency band combination supporting CA combination and a frequency band combination supporting ENDC combination.

S104. The terminal device receives the indication of adding the secondary cell from the base station.

Before the base station instructs the terminal device to access the secondary cell, the base station will send a secondary cell measurement message. The terminal device measures the signal parameters of the secondary cell according to the secondary cell measurement message, and sends the secondary cell measurement report to the base station. The base station sends a secondary cell addition indication to the terminal device according to the secondary cell measurement report indication, wherein the secondary cell addition indication includes the cell ID and frequency point information of the secondary cell.

The terminal device performs the addition operation of the secondary cell according to the instruction of adding the secondary cell, so that the terminal device can add the secondary cell when it resides in the primary cell, so that the base station of the primary cell and the base station of the secondary cell can provide network services for the terminal device at the same time the goal of.

In a possible implementation, after the terminal device camps on the primary cell with the best signal strength, and the cell with good signal strength forms a combination of CA and ENDC with the secondary cell, the data transmission rate of the terminal device may still be low. This is because, in a possible implementation, the terminal device executes step S102 to camp on the network based on the signal strength, and obtains the cell with the highest signal strength as the primary cell. The terminal device executes step S104 to add the secondary cell based on the addition instruction issued by the base station. However, when the CA combination and/or ENDC combination of the primary cell and the secondary cell with high signal strength is formed, the combination may not be a combination with a high network rate. When the combined network rate of the cell combination is low, data transmission of terminal equipment may occur. If the rate is not high, it will affect the operation of services in the terminal equipment.

In view of this, the embodiment of the present application provides a network selection method, by calculating the combined network rate value of the primary cell and the secondary cell under the CA combination and/or ENDC combination, to obtain a cell combination with a high combined network rate value; the terminal device Camp on the primary cell in the cell combination with a high combined network rate value, and add other cells in the cell combination as secondary cells. In this way, since the combined network rate value of the combined cell is high, when the terminal device accesses the primary cell and the secondary cell of the combined cell, the network rate that the combined cell can provide is increased, thereby increasing the data transmission rate of the terminal device.

Before describing the technical solution of the embodiment of the present application, firstly, the communication system in the embodiment of the present application will be described with reference to FIG. 2 . Fig. 2 shows a schematic diagram of a communication system to which the embodiment of the present application is applicable. as shown in picture 2:

The communication system may include multiple network devices and terminal devices. A network device may also be called an access network device, and is an entity on the network side for transmitting or receiving signals. Exemplarily, the network device may be an LTE base station, such as an evolved base station (evolutional NodeB, eNB or e-NodeB), and may also be an NR base station, such as a new radio controller (newradio controller, NRcontroller) or gNB. Alternatively, the network device may also be a centralized unit (centralized unit), remote radio module, micro base station, relay (relay), distributed unit (distributed unit), reception point (transmission reception point, TRP) or transmission point (transmission point, TP) or any other wireless access device, etc., which are not limited in this embodiment of the present application.

A terminal device may also be called a terminal (terminal), a user equipment (user equipment, UE), a mobile station (mobile station, MS), a mobile terminal (mobile terminal, MT) and so on. The terminal device can be mobile phone, smart TV, wearable device, tablet computer (Pad), computer with wireless transceiver function, virtual reality (virtual reality, VR) terminal device, augmented reality (augmented reality, AR) terminal device , wireless terminals in industrial control, wireless terminals in self-driving, wireless terminals in remote medical surgery, wireless terminals in smart grid, transportation safety Wireless terminals in (transportation safety), wireless terminals in smart cities, wireless terminals in smart homes, etc.

It can be understood that the base station can manage multiple cells. In this embodiment of the present application, a circle is used to represent a range of a cell for an example, and this example does not constitute a limitation on a specific type of cell area.

It should be noted that, in the embodiment of the present application, the network device may be a base station as an example, wherein the number of base stations and terminal devices may be one or more, and the number of base stations and terminals in the communication system shown in FIG. 2 is only an example of adaptability , which is not limited in this application.

The above communication system may be used to support a fourth generation (fourth generation, 4G) access technology, such as a long term evolution (long term evolution, LTE) access technology; or, the communication system may also support a fifth generation (fifth generation, 5G) Access technology, such as new radio (new radio, NR) access technology; or, the communication system can also be used to support third generation (third generation, 3G) access technology, such as universal mobile telecommunications system (universal mobile telecommunications system, UMTS) access technology; or the communication system can also be used to support the second generation (second generation, 2G) access technology, such as the global system for mobile communications (global system for mobile communications, GSM) access technology; or, the communication system can also It is used in a communication system supporting multiple wireless technologies, such as LTE technology and NR technology. In addition, the communication system can also be applied to Narrow Band-Internet of Things (NB-IoT), Enhanced Data rate for GSM Evolution (EDGE), and Wideband Code Division Multiple Access (CDMA) systems ( Wideband Code Division Multiple Access, WCDMA), Code Division Multiple Access 2000 system (Code Division Multiple Access, CDMA2000), Time Division Synchronization Code Division Multiple Access system (Time Division-Synchronization Code Division Multiple Access, TD-SCDMA), Long Term Evolution system (Long Term Evolution, LTE ) and future-oriented communication technologies.

The base station in Figure 2 can be used to support terminal access, for example, it can be a base transceiver station (base transceiver station, BTS) and a base station controller (base station controller, BSC) in a 2G access technology communication system, a 3G access technology Node B (node B) and radio network controller (radionetwork controller, RNC) in the communication system, evolved base station (evolved nodeB, eNB) in the 4G access technology communication system, next-generation base station (eNB) in the 5G access technology communication system A base station (next generation nodeB, gNB), a transmission reception point (transmission reception point, TRP), a relay node (relay node), an access point (access point, AP) and so on. For convenience of description, in all embodiments of the present application, devices that provide wireless communication functions for terminals are collectively referred to as network devices or base stations.

In order to better understand the embodiment of the present application, the following introduces the structure of the terminal device in the embodiment of the present application:

FIG. 3 shows a schematic structural diagram of the terminal device 100 . The terminal device 100 may include a processor 110, an external memory interface 120, an internal memory 121, a universal serial bus (universal serial bus, USB) interface 130, a charging management module 140, a power management module 141, a battery 142, an antenna 1, and an antenna 2 , mobile communication module 150, wireless communication module 160, audio module 170, speaker 170A, receiver 170B, microphone 170C, earphone jack 170D, sensor module 180, button 190, motor 191, indicator 192, camera 193, display screen 194, and A subscriber identification module (subscriber identification module, SIM) card interface 195 and the like. The sensor module 180 may include a pressure sensor 180A, a gyroscope sensor 180B, an air pressure sensor 180C, a magnetic sensor 180D, an acceleration sensor 180E, a distance sensor 180F, a proximity light sensor 180G, a fingerprint sensor 180H, a temperature sensor 180J, a touch sensor 180K, an ambient light sensor 180L, bone conduction sensor 180M, etc.

It can be understood that, the structure shown in the embodiment of the present application does not constitute a specific limitation on the terminal device 100 . In other embodiments of the present application, the terminal device 100 may include more or fewer components than shown in the figure, or combine certain components, or separate certain components, or arrange different components. The illustrated components can be realized in hardware, software or a combination of software and hardware.

The processor 110 may include one or more processing units, for example: the processor 110 may include an application processor (application processor, AP), a modem processor, a graphics processing unit (graphics processing unit, GPU), an image signal processor ( image signal processor (ISP), controller, video codec, digital signal processor (digital signal processor, DSP), baseband processor, and/or neural network processor (neural-network processing unit, NPU), etc. Wherein, different processing units may be independent devices, or may be integrated in one or more processors.

The controller can generate an operation control signal according to the instruction opcode and timing signal, and complete the control of fetching and executing the instruction.

A memory may also be provided in the processor 110 for storing instructions and data. In some embodiments, the memory in processor 110 is a cache memory. The memory may hold instructions or data that the processor 110 has just used or recycled. If the processor 110 needs to use the instruction or data again, it can be recalled from the memory. Repeated access is avoided, and the waiting time of the processor 110 is reduced, thereby improving the efficiency of the system.

In some embodiments, processor 110 may include one or more interfaces. The interface may include an integrated circuit (inter-integrated circuit, I2C) interface, an integrated circuit built-in audio (inter-integrated circuitsound, I2S) interface, a pulse code modulation (pulse code modulation, PCM) interface, a universal asynchronous receiver/transmitter (universal asynchronous receiver/ transmitter, UART) interface, mobile industry processor interface (mobile industry processor interface, MIPI), general-purpose input/output (general-purpose input/output, GPIO) interface, subscriber identity module (subscriber identity module, SIM) interface, and/or general-purpose A serial bus (universal serial bus, USB) interface, etc.

It can be understood that the interface connection relationship between the modules shown in the embodiment of the present application is a schematic description, and does not constitute a structural limitation of the terminal device 100 . In other embodiments of the present application, the terminal device 100 may also adopt different interface connection modes in the foregoing embodiments, or a combination of multiple interface connection modes.

The charging management module 140 is configured to receive a charging input from a charger. Wherein, the charger may be a wireless charger or a wired charger. In some wired charging embodiments, the charging management module 140 can receive charging input from the wired charger through the USB interface 130 . In some wireless charging embodiments, the charging management module 140 may receive wireless charging input through the wireless charging coil of the terminal device 100 . While the charging management module 140 is charging the battery 142 , it can also supply power to the terminal device through the power management module 141 .

The power management module 141 is used for connecting the battery 142 , the charging management module 140 and the processor 110 . The power management module 141 receives the input from the battery 142 and/or the charging management module 140 to provide power for the processor 110 , the internal memory 121 , the display screen 194 , the camera 193 , and the wireless communication module 160 . The power management module 141 can also be used to monitor parameters such as battery capacity, battery cycle times, and battery health status (leakage, impedance). In some other embodiments, the power management module 141 may also be disposed in the processor 110 . In some other embodiments, the power management module 141 and the charging management module 140 may also be set in the same device.

The wireless communication function of the terminal device 100 may be implemented by the antenna 1, the antenna 2, the mobile communication module 150, the wireless communication module 160, a modem processor, a baseband processor, and the like.

The terminal device 100 implements a display function through a GPU, a display screen 194, an application processor, and the like. The GPU is a microprocessor for image processing, and is connected to the display screen 194 and the application processor. GPUs are used to perform mathematical and geometric calculations for graphics rendering. Processor 110 may include one or more GPUs that execute program instructions to generate or change display information.

The display screen 194 is used to display images, videos and the like. The display screen 194 includes a display panel. The display panel may be a liquid crystal display (LCD), an organic light-emitting diode (OLED), an active-matrix organic light-emitting diode or an active-matrix organic light-emitting diode (active-matrix organic light emitting diode). AMOLED), flexible light-emitting diode (flex light-emitting diode, FLED), Miniled, MicroLed, Micro-oLed, quantum dot light-emitting diodes (quantum dotlight emitting diodes, QLED), etc. In some embodiments, the terminal device 100 may include 1 or N display screens 194, where N is a positive integer greater than 1.

The terminal device 100 can realize the shooting function through the ISP, the camera 193 , the video codec, the GPU, the display screen 194 and the application processor.

The terminal device 100 may implement an audio function through an audio module 170, a speaker 170A, a receiver 170B, a microphone 170C, an earphone interface 170D, and an application processor. Such as music playback, recording, etc.

The audio module 170 is used to convert digital audio information into analog audio signal output, and is also used to convert analog audio input into digital audio signal. The audio module 170 may also be used to encode and decode audio signals. In some embodiments, the audio module 170 may be set in the processor 110 , or some functional modules of the audio module 170 may be set in the processor 110 .

The SIM card interface 195 is used for connecting a SIM card. The SIM card can be connected and separated from the terminal device 100 by inserting it into the SIM card interface 195 or pulling it out from the SIM card interface 195 . The terminal device 100 may support 1 or N SIM card interfaces, where N is a positive integer greater than 1. SIM card interface 195 can support Nano SIM card, Micro SIM card, SIM card and so on. Multiple cards can be inserted into the same SIM card interface 195 at the same time. The types of multiple cards may be the same or different. The SIM card interface 195 is also compatible with different types of SIM cards. The SIM card interface 195 is also compatible with external memory cards. The terminal device 100 interacts with the network through the SIM card to implement functions such as calling and data communication. In some embodiments, the terminal device 100 adopts an eSIM, that is, an embedded SIM card. The eSIM card can be embedded in the terminal device 100 and cannot be separated from the terminal device 100 .

The network selection method provided by the embodiment of the present application will be described in detail below with reference to the accompanying drawings. It should be noted that "at the time" in the embodiments of the present application may refer to the instant when a certain situation occurs, or within a period of time after a certain situation occurs, and this embodiment of the present application does not make specific limited.

Exemplarily, the terminal device executes the network selection method of the embodiment of the present application in conjunction with FIG. 4 below. FIG. 4 shows a schematic flow diagram of a network selection method provided by the embodiment of the present application, as shown in FIG. 4:

S401. The terminal device resides in the first cell.

The first cell may be a cell with the highest signal strength where the terminal device can camp. After the terminal device detects a network state change event, it can perform a network camping process of cell search and cell selection. For the cell search process and the cell selection process, reference may be made to the relevant description of step S102, which will not be repeated in this embodiment of the present application. After performing cell search and cell selection, the terminal device can obtain the first cell with the highest signal strength according to the channel quality of the cell, and the terminal device camps in the first cell.

The network status change event is used to instruct the terminal equipment to perform cell search. The network state change event includes at least one of the following: a terminal device power-on event, an airplane mode off event, or a card insertion event. Understandably so. When performing operations such as powering on, turning off the airplane mode, or inserting a card, the network status of the terminal device will change, and the terminal device needs to be re-resident on the network.

S402. The terminal device obtains information of N cells, and the information of any cell includes: cell signal strength, cell frequency band, and cell network rate value, where N is a natural number.

When the terminal device performs cell search and cell selection, it can obtain the information of N cells. The N cells may be understood as all or part of the cells that the terminal device can search for under the coverage of the base station, where the N cells may include the first cell where the terminal device resides and the neighboring cells of the first cell. The information of the cell may include: the signal strength of the cell, the frequency band of the cell, and the network speed value of the cell.

The signal strength of the cell can be used to characterize the channel quality of the cell, and the terminal device can measure the signal strength of N cells; the frequency band of the cell can be the frequency band supported by the terminal device corresponding to the frequency point of the cell, and the terminal device can obtain N from the base station. The cell frequency band of the cell; the cell network rate value is the maximum theoretical rate value that the cell can achieve in the frequency band, and the cell network rate value of any cell is based on the following one or more relevant information of any cell. Query the set correspondence table: cell frequency band, modulation order, number of carriers, multiple-input multiple-output MIMO parameters, link direction, subcarrier spacing, bandwidth of single carrier component CC or number of carrier component CCs, etc. The correspondence table can be stored in the terminal equipment, and the terminal equipment can look up the table based on relevant information to obtain the cell network rate value; the correspondence table can also be stored in the base station, and the terminal equipment obtains the cell network rate value delivered by the base station. No limit.

Exemplarily, the terminal device can support different networking modes, such as CA combination and ENDC combination. Wherein, during the networking process, two base stations can serve the same terminal device at the same time. For the terminal equipment, one of the base stations is the primary base station, and the serving cell provided by the primary base station is the primary cell (PCell); the other base station is the secondary base station, and the serving cell provided by the secondary base station is the secondary cell (SCell). In the CA networking mode, both the primary cell and the secondary cell accessed by the terminal device are LTE cells, and the LTE cell is a wireless area controlled by an LTE base station. In the ENDC networking mode, the primary cell accessed by the terminal device is an LTE cell, the secondary cell is an NR cell, and the NR cell is a wireless area controlled by an NR base station. Since there are differences in network standards applicable to the LTE cell and the NR cell, the LTE cell and the NR cell are distinguished in the preset correspondence table.

For example, the corresponding relationship table of the cell network rate value of the LTE cell may be as shown in Table 1:

Table 1 Correspondence table of cell network rate values of LTE cells

It can be understood that the terminal device can perform a frequency scanning process when camping on the network. After the frequency scanning is completed, the terminal device can send to the base station to obtain the cell corresponding to each frequency point and the parameter information related to the cell, and the base station sends the information to To the terminal equipment, in this way, the terminal equipment can obtain the information of the cell.

Exemplarily, taking an LTE cell as an example, the relevant information of the LTE cell that the terminal device can obtain includes at least one of the following: modulation order, number of carriers, MIMO (multiple input multiple output) and time slot Proportion. Among them, the modulation order can be used to represent the amount of information represented by a symbol. The higher the modulation order, the more information a single symbol represents, and the faster the network rate can be provided; the carrier number is used to represent the The number of resident carriers; MIMO is used to represent the number of transmission paths on a single carrier, which can be determined by the number of antennas of the terminal device and the base station. The larger the MIMO, the stronger the transmission capability of the single carrier; the time slot ratio is used to represent the uplink The ratio to the frequency bandwidth occupied by the downlink, for the frequency-division duplex (FDD) frequency band, the uplink and downlink respectively occupy the frequency bandwidth, and they do not affect each other, so they are all 1. For the time-division duplex (TDD) ) frequency band, since the uplink and downlink share a frequency bandwidth, it is necessary to allocate the time for uplink and downlink. The terminal device obtains the cell network rate value corresponding to the LTE cell by looking up the table according to the above relevant information. For example: in the relevant information of an LTE cell, when the modulation order is 256QAM, the number of carriers is 1, the MIMO value is 2, and the time slot ratio is 1, the terminal device can obtain the cell network rate value of the LTE cell as 201.6Mbps.

It should be noted that related information such as the number of RB (resource block, resource block), the number of subcarriers, the number of time slots (slots), the number of symbols (symbols), and non-data RE (resource unit, resource element) discounts can be fixed values or There is a corresponding relationship with other relevant information. Among them, the number of sub-carriers can be understood as the number of sub-bands obtained by dividing the frequency band of a frequency band; the interval between sub-carriers is related to the length of symbols, and the length of symbols is the basic unit of data transmission, and the number of symbols can be obtained according to the number of sub-carriers; time slot It is used to transmit multiple symbols; the number of RBs is used to represent the amount of data transmitted by all subcarriers in a time slot; the non-data RE discount is used to represent the discount value of the amount of data transmitted by a single subcarrier in a single time slot. For example, for a frequency bandwidth of 20 MHz, the number of RBs is 100, the number of subcarriers is 12, the number of slots is 2, the number of symbols is 7, and the non-data RE discount is 0.75. Therefore, the terminal device can determine the cell network rate value of the LTE cell according to parameters such as modulation order, number of carriers, MIMO, and time slot ratio.

For another example, the corresponding relationship table of the cell network rate value of the NR cell may be as shown in Table 2:

Table 2 Correspondence table of cell network rate values of NR cells

It can be understood that the terminal device can obtain the relevant information of the NR cell: frequency band (including FR1 and FR2, FR1 can represent the low frequency band, FR2 can represent the millimeter wave high frequency band), uplink/downlink direction (UL (up load) / DL (down load)), modulation order, subcarrier spacing μ, single CC (carrier unit, component carrier) bandwidth BW(j), CC number j, subframe ratio and MIMO value. The terminal device obtains the cell network rate value corresponding to the NR cell by looking up the table according to the above relevant information. For example: in the relevant information of the NR cell, the frequency band is FR1, the direction is DL, the modulation order is 256QAM, the subcarrier spacing is 30KHz, the single CC bandwidth is 100, the number of CCs is 1, the subframe ratio is 0.7429, and the MIMO value is 4. The cell network speed value of the NR cell obtained by looking up the table is 1739.057132 Mbps.

It should be noted that the reduction factor f ^(j) (the reduction factor provided by scalingFactor, the value range can include 1, 0.8, 0.75 and 0.4), the target code rate R _max (the maximum target code rate of PDSCH MCS is 948÷1024≈ 0.9257813), spectrum overhead OH ^(j) , (the maximum number of RB allocations in the bandwidth BW(j) corresponding to the subcarrier spacing μ), OFDM (orthogonal frequency division multiplexing) number of symbols and duration Relevant information such as (average OFDM symbol duration in a subframe with subcarrier spacing μ) can be a fixed value or have a corresponding relationship with other relevant information, for example, for an NR cell with frequency band FR1 and direction DL, its reduction factor f ^(j) is 1, _Rmax is 12, OH ^(j) is 0.14, /> is 273, the number of OFDM symbols is 28, /> is 4×10 ^-5 . Therefore, the terminal device can determine the cell network rate value of the NR cell according to parameters such as frequency band, direction, modulation order, subcarrier spacing, single CC bandwidth, CC number, and subframe ratio.

Table 1 and Table 2 only exemplarily show the corresponding relationship between the network rate values of some cells in the embodiment of the present application, and the corresponding relationship table can be modified according to the actual situation. The embodiment of the present application does not limit this. In a possible implementation manner, the N cells may be historical cell information searched by the terminal device when executing step S401, and the terminal device obtains the cell signal strength, cell frequency band, and cell network rate from the historical cell information. In this way, the network searching process of the terminal equipment can be reduced, and the network resident efficiency of the network selection method can be improved. In another possible implementation manner, the N cells may also be cell information acquired by the terminal device in real time. The embodiment of the present application does not limit this.

S403. The terminal device obtains M cell combinations in N cells based on the frequency band combination capability information of the terminal device, wherein the frequency band combination capability information includes multiple groups of frequency band combinations, and the cell frequency bands in any cell combination and the frequency bands in the multiple groups of frequency band combinations A combination of frequency bands is consistent; M is a natural number.

The frequency band combination capability is used to indicate the combined frequency bands that the terminal device can support, and the terminal device can obtain UE capability information (UE capability information), where the UE capability message can include the band combination (bandcombination) capability, and the terminal device can combine according to the frequency band The network standard of the medium carrier defines the frequency band combination as CA frequency band combination, ENDC frequency band combination and other types.

The frequency band combination capability includes one or more frequency band combinations, each frequency band combination may include one or more carriers, and each carrier may correspond to one or more bandwidths. After obtaining the information of the N cells, the terminal device matches the information of the cells with the frequency band combination capability, so that the N cells form an M cell combination, thereby increasing the bandwidth.

For example, taking the ENDC frequency band combination as an example, the frequency band combination supported by the frequency band combination capability of the terminal device may include: BC_3A+n41A, which can be understood as a frequency band combination composed of LTE Band 3 and NR Band 41. The cell information may include: the frequency band corresponding to the frequency point of Cell A is LTE Band 1; the frequency band corresponding to the frequency point of Cell B is LTE Band 3; the frequency band corresponding to the frequency band of Cell C is LTE Band 3; The frequency band is NR Band 41; the corresponding frequency band of Cell E is NR Band 78. Then, the cell combination that can form BC_3A+n41A among the N cells can include: Cell B+Cell D and Cell C+Cell D.

S404. Based on the information of each cell in the M cell combinations, the terminal device obtains a target cell combination in which the combined network rate value of the M cell combinations satisfies a preset condition.

The combined network rate value is the network rate value that the combined network rate can provide for terminal devices in the current environment after the cell is networked.

The terminal device can obtain the combined network rate value of any cell combination according to the cell network rate value and signal strength of each cell in any cell combination. After traversing the M cell combinations, the terminal device obtains M combined network rate values. The terminal device sorts these combined network rate values in ascending order or descending order, and obtains target cell combinations that meet the preset conditions. Wherein, the target cell combination of the preset condition may be the cell combination corresponding to the maximum combined network rate value among the M cell combinations.

The embodiment of the present application will describe in detail the method of obtaining the combined network rate value of any cell combination according to the cell network rate value and signal strength of each cell in any cell combination, and will not be repeated here.

S405. When the target cell combination includes the second cell and the third cell, the terminal device switches from the first cell to the second cell.

The target cell combination includes the second cell and the third cell, wherein the first cell and the second cell are not the same cell. The terminal device may stop camping on the first cell and handover from the first cell to the second cell.

It can be understood that the target cell combination may include one or more cells. In this embodiment of the application, the cell combination of the second cell and the third cell is taken as the target cell combination as an example. Quantity is limited.

The procedure for the terminal device to switch from the first cell to the second cell may be as follows: the terminal device sends a cell reselection request to the base station of the first cell; the base station of the first cell instructs the terminal device to reselect to the second cell; The base station of the cell establishes a connection, and the terminal equipment camps on the second cell.

S406. When the bandwidth of the terminal device in the second cell does not meet service requirements, add a third cell for the terminal device.

It can be understood that, when the traffic volume or load of the terminal device is higher than a preset threshold, the base station may add a secondary cell for the terminal device. The preset threshold may be related to configuration parameters of the terminal device itself. However, when the traffic volume or load of the terminal device is not higher than the preset threshold, the base station may instruct the terminal device to release the secondary cell when the terminal device is added with the secondary cell.

In some embodiments, the terminal device resides in the second cell, and when the bandwidth of the second cell does not meet the service requirements, the base station of the second cell can add a secondary cell for the terminal device, so that the base station of the primary cell and the base station of the secondary cell can be combined Provide greater transmission network speed for terminal equipment. Wherein, the secondary cell may be the third cell.

Optionally, the process of adding the third cell to the terminal equipment by the base station of the second cell may be as shown in steps S501-S505 in FIG. 5:

S501. The terminal device resides in the second cell.

The terminal device can obtain the target cell combination according to steps S401-S405, and camp on the primary cell (second cell) of the target cell combination.

S502. The terminal device receives an indication of adding the third cell sent by the base station of the second cell.

The indication of adding the third cell may be a radio resource control (radio resource control, RRC) reconfiguration message, where the RRC reconfiguration message may include information of the secondary cell to be added, and the secondary cell to be added may be the third cell.

When the terminal device camps on the second cell, and the bandwidth provided by the base station of the second cell does not meet the service requirements, the base station of the second cell sends a third cell addition instruction to the terminal device; the third cell addition instruction is used to instruct the terminal The device adds a third cell.

S503. The terminal device performs an operation of adding the third cell according to the indication of adding the third cell.

The terminal device adds the third cell according to the RRC reconfiguration message. After the terminal device camps on the second cell of the target cell combination and adds the third cell, the base station can provide the terminal device with a higher combined network rate value.

Exemplarily, after the terminal device adds the second cell as the primary cell and the third cell as the secondary cell, the base station of the second cell and the base station of the third cell can simultaneously provide services for the terminal device. For example: the second cell is an LTE cell, and the third cell is an NR cell. In a possible implementation, the data information is uplink data, and the terminal device can send the data information to the base station, and the data information can be grouped into LTE and NR two-way data after passing through the packet data convergence protocol (PDCP) layer information. Subsequently, the LTE data information is sent to the base station of the LTE cell through the evolved UMTS terrestrial radio access media access control layer (universal terrestrial radio access media access control, E-UTRAMAC); the NR data information is sent to the base station of the NR cell through the NR MAC layer . In another possible implementation, the data information is downlink data, the base station can send the data information to the terminal device, and the terminal device can receive the two channels of data information of LTE and NR at the same time, the sending method is similar to the uplink data, which is not done here repeat. In this way, the terminal device can receive data information sent by the base station of the second cell and the base station of the third cell at the same time, and the terminal device can also send data information to the base station of the second cell and the base station of the third cell respectively, thereby improving the security of the terminal device. network speed.

It can be understood that, when the first cell and the second cell are not the same cell, the terminal device may perform steps S401-S406. The terminal device switches the cell in which it resides from the first cell to the second cell, and adds a third cell for the terminal device. When the first cell and the second cell are the same cell, the terminal device can execute S401-S404 to obtain the target cell combination including the first cell and the third cell. At this time, the terminal device does not perform the cell reselection process, and the first cell The base station may add a third cell for the terminal device. In this way, multiple cells with the highest combined network rate values can simultaneously provide network services for the terminal device, so as to increase the data transmission rate of the terminal device.

In the network selection method provided by the embodiment of the present application, the terminal device resides in the first cell; the terminal device obtains the information of N cells; the terminal device obtains M cells among the N cells based on the frequency band combination capability information of the terminal device Combination; based on the information of each cell in the M cell combinations, the terminal device obtains a target cell combination in which the combined network rate value of the M cell combinations meets the preset conditions; when the target cell combination includes the second cell and the third cell, the terminal The device switches from the first cell to the second cell; when the bandwidth of the terminal device in the second cell does not meet the service requirements, a third cell is added for the terminal device. In this way, the second cell and the third cell can form a target cell combination with the highest combined network rate value. After the terminal device accesses the second cell and the third cell, the target cell combination can provide the terminal device with a higher combined network rate value , to increase the data transmission rate of the terminal device.

Step S404 is further described below in conjunction with FIG. 6, wherein, based on the information of each cell in the M cell combinations, the terminal device obtains a target cell combination in which the combined network rate value of the M cell combinations satisfies a preset condition, including:

S601. The terminal device screens out cell combinations whose cell signal strength is lower than a first threshold value among the M cell combinations, to obtain L cell combinations.

The cell information also includes a first threshold value, where the first threshold value is a signal strength threshold value, which is used to instruct the terminal device to perform cell reselection when the signal strength meets the threshold condition. The terminal device may measure the cell signal strength of each cell in the M cell combinations, and filter the measured cell signal strength. When the signal strength of each cell in the cell combination is greater than or equal to the first threshold value, the terminal device retains the cell combination; when the signal strength of any cell in the cell combination is lower than the first threshold value, the terminal device screens out the cell combination. The cell mix. The terminal device obtains L cell combinations in which the signal strength of each cell satisfies the first threshold.

It can be understood that, in order to improve the computing efficiency of the terminal device, the terminal device may screen out the acquired N cells when performing step S402 to obtain cells whose signal strength is not lower than the first threshold value, and then the terminal device may Step S403 is executed to perform cell combination on the cells satisfying the first threshold. In this way, the calculation of invalid cells can be reduced, and the networking efficiency of the network selection method can be improved. This embodiment of the present application will not describe it in detail.

S602. The terminal device calculates a combined network rate value of the cell combination based on the cell signal strength of each cell in any cell combination and the cell network rate value of each cell.

The combined network rate value may be the sum of the network rate values of the cells in the cell combination under the current channel quality. It can be understood that the combined network rate value may represent the network rate that can be provided to the terminal device under the current environment after multiple cells are networked.

Exemplarily, the combined network rate value of any combination of cells satisfies the following formula:

Among them, R is the combined network rate value of the cell combination; n is the number of cells in the cell combination, P _i is the signal strength percentage of the i-th cell; R _i is the cell network rate value of the i-th cell.

P _i is a percentage obtained according to the signal strength of the cell, and is used to give the frequency band information a percentage of the network rate value of the cell according to the frequency band information of the cell. It can be understood that R _i can be understood as the maximum cell network rate value that the i-th cell can reach; P _i ×R _i can be understood as the cell network rate value of the i-th cell under the current channel quality, where Pi Customizable settings.

In a possible implementation manner, this embodiment of the present application provides a manner of setting _Pi .

Exemplarily, the terminal device can set the first threshold value Thresh as a standard value, and set the first threshold value as K% (K is a fixed value, and 0≤K<100); set the signal corresponding to every increase of 1% Strength change amount ΔS; calculate the signal strength percentage P _i of the cell according to the difference between the signal strength S of the cell and the first threshold value. Wherein, P _i =((S-Thresh)/ΔS+K)%.

Wherein, K and ΔS can be customized, which is not limited in this embodiment of the present application.

In some embodiments, the P _i obtained by the terminal device may exceed 1, which indicates that the current channel quality is relatively high, and the terminal device determines that the influence of the current channel quality on the network rate value of the cell is low. At this time, the terminal device sets the P _i to is 100%.

The embodiment of the present application exemplarily provides a method for setting P _i , which will not limit the network selection method provided in the embodiment of the present application. In the embodiment of the present application, other methods can also be used to set the channel quality and cell network rate Value correspondence, for example, the terminal device can set the signal strength of the lowest cell among the N cells as the standard value, or set the signal strength of the highest cell among the N cells as the standard value, or set the signal strength of the cell among the N cells as the standard value. The average value of the signal strength is set as a standard value, etc., which is not limited in this embodiment of the present application.

After obtaining P _i , the terminal device can calculate the product of P _i and R _i to obtain the cell network rate value of the cell under the current channel quality.

The terminal device traverses each cell in the cell combination to obtain the cell network rate values of multiple cells under the current channel quality; the terminal device sums the network rate values of each cell under the current channel quality to obtain the combined network of the cell combination rate value.

The above formula will be described below by taking the cell combination including the second cell and the third cell as an example.

Exemplarily, the number of cells in the cell combination is 2, the percentage of the signal strength of the second cell is P ₂ , the cell network speed value that can be achieved by the frequency band of the second cell is S ₂ ; the percentage of the signal strength of the third cell is P ₃ , the cell network rate value that can be achieved by the frequency band of the second cell is S ₃ , and the combined network rate value that can be achieved by the combination of cells under the current channel quality is R=P ₂ ×S ₂ +P ₃ ×S ₃ .

S603. The terminal device traverses the L cell combinations, and calculates combined network rate values of the L cell combinations.

The terminal device executes steps S601-S602 to traverse and calculate any cell combination in the L cell combinations to obtain a set of combined network rate values of the L cell combinations.

S604. The terminal device screens the combined network rate values of the L cell combinations to obtain a target cell combination that satisfies a preset condition.

The terminal device can sort the combined network rate values of the L cell combinations to obtain a target cell combination that satisfies a preset condition. Wherein, the target cell combination satisfying the preset condition includes the cell combination corresponding to the maximum combined network rate value among the L cell combinations.

Exemplarily, the terminal device may arrange the combined network rate values of the L cell combinations in ascending/descending order, so as to obtain the cell combination with the largest combined network rate value, and set the cell combination as the target cell combination.

It can be understood that, in this embodiment of the present application, the terminal device may be used to execute steps S601-S604 to calculate the target cell combination. In order to improve computing efficiency, in the embodiment of the present application, a base station with a larger computing power may also be used to perform the computing process of steps S601-604, which is not limited in the embodiment of the present application.

In the network selection method provided by the embodiment of the present application, the terminal equipment screens out the cell combinations whose cell signal strength is lower than the first threshold value in the M cell combinations to obtain L cell combinations; the terminal device is based on any cell combination The cell signal strength of each cell and the cell network rate value of each cell are calculated to obtain the combined network rate value of the cell combination; the terminal device traverses L cell combinations and calculates the combined network rate value of the L cell combination; A target cell combination that satisfies a preset condition is obtained from the combined network rate values of the cell combination. In this way, the terminal device can calculate the target cell combination that meets the preset conditions in the cell combination, so that the cells in the target cell combination can provide high network rate services for the terminal device after networking, and improve the ability of the terminal device to run network services .

The above embodiments describe the execution of the network selection method provided by the embodiments of the present application by the terminal device with reference to FIGS. 4-6 . In practical applications, terminal devices have limited computing power. On this basis, the embodiment of the present application also provides a network selection method based on base station execution. As shown in Figure 7:

S701. The base station instructs the terminal device to camp on the first cell.

After receiving the network status change event reported by the terminal device, the base station may instruct the terminal device to perform a network camping process of cell search and cell selection. For the cell search process and the cell selection process, reference may be made to the relevant description of step S102, which will not be repeated in this embodiment of the present application. The base station may receive the first cell measurement report reported by the terminal device, and instruct the terminal device to camp on the first cell.

Wherein, the network state change event includes at least one of the following: terminal device power-on event, flight mode off event or card insertion event

S702. The base station acquires information of N cells, and the information of any cell includes: cell signal strength, cell frequency band, and cell network rate value.

The base station of the first cell can perform signaling interaction with other base stations to obtain information such as physical cell ID, SIB, MIB, etc., and the above information can carry the frequency band of the cell. The base station of the first cell sends the above information to the terminal device, and the terminal device can measure the signal strengths of the N cells, and report the measurement report including the signal strengths of the N cells to the base station of the first cell.

The base station of the first cell can query the preset correspondence table according to the frequency band of the cell and related information to obtain the network rate value of the cell. For the table lookup process, refer to the related expressions in Table 1 and Table 2, which will not be repeated here.

S703. The base station sends first signaling for querying frequency band combination capability information to the terminal device.

The first signaling is used to instruct the terminal equipment to query the frequency band combination capability information, and the first signaling may be a terminal equipment capability inquiry (UE capability enqiry) message. The base station of the first cell sends the first signaling to the terminal device; the terminal device reports the capability information of the terminal device to the base station of the first cell after querying its own configured capability, wherein the capability information of the terminal device includes frequency band combination capability information.

S704. The base station obtains M cell combinations in the N cells based on the frequency band combination capability information of the terminal equipment, wherein the frequency band combination capability information includes multiple groups of frequency band combinations, and one of the cell frequency bands in any cell combination and the multiple groups of frequency band combinations The combination of frequency bands is consistent; both N and M are natural numbers.

The principle that the base station obtains M cell combinations in N cells based on the frequency band combination capability information of the terminal device is similar to the principle that the terminal device obtains M cell combinations in N cells based on the frequency band combination capability information, and can refer to step S403 Relevant descriptions are not repeated in this embodiment of the present application.

S705. Based on the information of each cell in the M cell combinations, the base station obtains a target cell combination in which the combined network rate value of the M cell combinations satisfies a preset condition.

The base station of the first cell can obtain the combined network rate value of any cell combination according to the cell network rate value and signal strength of each cell in any cell combination. After traversing the M cell combinations, the base station of the first cell obtains M combined network rate values. The base station of the first cell sorts these combined network rate values in ascending order or descending order, and obtains a combination of target cells satisfying preset conditions. Wherein, the target cell combination of the preset condition may be the cell combination corresponding to the maximum combined network rate value among the M cell combinations.

The following embodiments of the present application describe in detail the method of obtaining the combined network rate value of any cell combination according to the cell network rate value and signal strength of each cell in any cell combination in conjunction with steps S801-S804.

Exemplarily, based on the information of each cell in the M cell combinations, the base station obtains a target cell combination in which the combined network rate value of the M cell combinations satisfies a preset condition, including:

S801. The base station screens out cell combinations whose cell signal strength is lower than a first threshold value among the M cell combinations, to obtain L cell combinations.

The cell information also includes a first threshold value, where the first threshold value is a signal strength threshold value, which is used to instruct the terminal device to perform cell reselection when the signal strength meets the threshold condition. The base station receives the cell signal strength of each cell in the M cell combinations reported by the terminal device, and screens the cell signal strength. When the signal strength of each cell in the cell combination is greater than or equal to the first threshold value, the cell combination is retained; when the signal strength of any cell in the cell combination is lower than the first threshold value, the cell combination is screened out. The base station obtains L combinations of cells sent by the terminal device, in which the signal strength of each cell satisfies the cell reselection threshold.

S802. The base station calculates a combined network rate value of the cell combination based on the cell signal strength of each cell in any cell combination and the cell network rate value of each cell.

For the calculation process of the base station calculating the combined network rate value of the cell combination, reference may be made to the relevant description in step S602, which will not be repeated in this embodiment of the present application.

S803. The base station traverses the L cell combinations, and calculates combined network rate values of the L cell combinations.

The base station executes steps S801-S802 to traverse and calculate any cell combination in the L cell combinations to obtain a set of combined network rate values of the L cell combinations.

S804. The base station screens the combined network rate values of the L cell combinations to obtain a target cell combination that satisfies a preset condition.

The base station can sort the combined network rate values of the L cell combinations to obtain target cell combinations that meet preset conditions. Wherein, the target cell combination satisfying the preset condition includes the cell combination corresponding to the maximum combined network rate value among the L cell combinations.

The base station of the first cell may perform steps S801-S804 to obtain the target cell combination.

It can be understood that the principles of steps S801-S804 are similar to those of steps S601-S604, which will not be further described in this embodiment of the present application.

S706. When the target cell combination includes the second cell and the third cell, the base station instructs the terminal device to switch from the first cell to the second cell.

The target cell combination includes the second cell and the third cell, wherein the first cell and the second cell are not the same cell. The base station of the first cell may instruct the terminal device to stop camping on the first cell and to handover from the first cell to the second cell. The terminal device may camp on the base station of the second cell.

It can be understood that the target cell combination may include one or more cells. In this embodiment of the application, the cell combination of the second cell and the third cell is taken as the target cell combination as an example. Quantity is limited.

S707. When the bandwidth in the second cell does not meet the service requirement, the base station adds a third cell for the terminal device.

In some embodiments, the terminal device resides in the second cell, and when the bandwidth of the second cell does not meet service requirements, the base station of the second cell can add a secondary cell for the terminal device to provide the terminal device with a greater transmission network rate. Wherein, the secondary cell may be the third cell.

For the process of adding the third cell to the terminal device by the base station of the second cell, reference may be made to the related descriptions of steps S501-S505, which will not be repeated here.

It should be noted that, in steps S701-S707, the base station may be understood as the base station corresponding to the cell where the terminal device currently resides. For example: when the terminal device camps on the first cell, the base station may correspond to the base station of the first cell; when the terminal device camps on the second cell, the base station may correspond to the base station of the second cell. The base station does not specifically refer to the base station of the first cell, the base station of the second cell, or other base stations, which is not limited in this embodiment of the present application.

In the network selection method provided by the embodiment of the present application, the base station instructs the terminal device to reside in the first cell; the base station obtains information on N cells; the base station sends the first signaling for querying the frequency band combination capability information to the terminal device; the base station based on The frequency band combination capability information from the terminal equipment obtains M cell combinations in N cells; the base station obtains the target cell combination in which the combined network rate value of the M cell combinations meets the preset conditions based on the information of each cell in the M cell combinations ; When the target cell combination includes the second cell and the third cell, the base station instructs the terminal device to switch from the first cell to the second cell; when the bandwidth in the second cell does not meet the service requirements, the base station adds a third cell for the terminal device . In this way, the second cell and the third cell can form a target cell combination with the highest combined network rate value. After the base station instructs the terminal device to access the second cell and the third cell, the target cell combination can provide the terminal device with a higher combined network rate. rate to increase the data transmission rate of the terminal device.

The network selection method in the embodiment of the present application has been described above, and the device for performing the above network selection method provided in the embodiment of the present application will be described below. Those skilled in the art can understand that the method and the device can be combined and referred to each other, and the related device provided in the embodiment of the present application can execute the steps in the above network selection method.

As shown in Figure 8, Figure 8 is a schematic structural diagram of a network selection device provided by the embodiment of the present application. The network selection device may be the terminal device in the embodiment of the present application, or it may be a chip or a chip system in the terminal device .

As shown in FIG. 8 , the network selection device 800 may be used in a communication device, a circuit, a hardware component or a chip, and the network selection device includes: a display unit 801 and a processing unit 802 . Wherein, the display unit 801 is used to support the steps of display performed by the network selection device 800 ; the processing unit 802 is used to support the steps of information processing performed by the network selection device 800 .

In a possible implementation manner, the network selection device 800 may also include a communication unit 803 . Specifically, the communication unit is used to support the network selection device 800 to perform the steps of sending data and receiving data. Wherein, the communication unit 803 may be an input or output interface, a pin or a circuit, and the like.

In a possible embodiment, the device for network selection may further include: a storage unit 804 . The processing unit 802 and the storage unit 804 are connected by wires. The storage unit 804 may include one or more memories, and the memories may be devices used to store programs or data in one or more devices and circuits. The storage unit 804 may exist independently, and is connected to the processing unit 802 of the network selection device through a communication line. The storage unit 804 may also be integrated with the processing unit 802 .

The storage unit 804 may store computer-executable instructions of the methods in the terminal device, so as to enable the processing unit 802 to execute the methods in the foregoing embodiments. The storage unit 804 may be a register, a cache, or a RAM, and the storage unit 804 may be integrated with the processing unit 802 . The storage unit 804 may be a read-only memory (read-only memory, ROM) or other types of static storage devices that can store static information and instructions, and the storage unit 804 may be independent from the processing unit 802 .

The network selection method provided in the embodiment of the present application may be applied to an electronic device with a communication function. The electronic device includes a terminal device, and the specific device form of the terminal device can refer to the relevant description above, and will not be repeated here.

An embodiment of the present application provides a terminal device, which includes: a processor and a memory; the memory stores computer-executable instructions; the processor executes the computer-executable instructions stored in the memory, so that the terminal device executes the above method.

An embodiment of the present application provides a chip. The chip includes a processor, and the processor is used to call the computer program in the memory to execute the technical solutions in the above embodiments. Its implementation principle and technical effect are similar to those of the above-mentioned related embodiments, and will not be repeated here.

The embodiment of the present application also provides a computer-readable storage medium. A computer readable storage medium stores a computer program. The above method is realized when the computer program is executed by the processor. The methods described in the foregoing embodiments may be fully or partially implemented by software, hardware, firmware or any combination thereof. If implemented in software, the functions may be stored on or transmitted over as one or more instructions or code on a computer-readable medium. Computer-readable media may include computer storage media and communication media, and may include any medium that can transfer a computer program from one place to another. A storage media may be any target media that can be accessed by a computer.

In a possible implementation, the computer-readable medium may include RAM, ROM, compact disc read-only memory (CD-ROM) or other optical disc storage, magnetic disk storage or other magnetic storage devices, or target-carried Any other medium or store the required program code in the form of instructions or data structures and be accessible by the computer. Also, any connection is properly termed a computer-readable medium. For example, if the software is transmitted from a website, server, or other remote source using coaxial cable, fiber optic cable, twisted pair, Digital Subscriber Line (DSL), or wireless technologies such as infrared, radio, and microwave, then coaxial Cable, fiber optic cable, twisted pair, DSL, or wireless technologies such as infrared, radio, and microwave are included in the definition of medium. Disk and disc, as used herein, includes compact disc, laser disc, optical disc, Digital Versatile Disc (DVD), floppy disk and blu-ray disc where disks usually reproduce data magnetically, while discs reproduce data optically with lasers. Combinations of the above should also be included within the scope of computer-readable media.

An embodiment of the present application provides a computer program product, the computer program product includes a computer program, and when the computer program is run, the computer is made to execute the foregoing method.

Embodiments of the present application are described with reference to flowcharts and/or block diagrams of methods, devices (systems), and computer program products according to the embodiments of the present application. It should be understood that each procedure and/or block in the flowchart and/or block diagram, and a combination of procedures and/or blocks in the flowchart and/or block diagram can be realized by computer program instructions. These computer program instructions can be provided to a general purpose computer, special purpose computer, embedded processing machine, or processing unit of other programmable devices to produce a machine such that the instructions executed by the processing unit of the computer or other programmable data processing device produce Means for specifying functions in one or more steps of a flowchart and/or one or more blocks of a block diagram.

The above specific implementation manners have further described the purpose, technical solutions and beneficial effects of the present invention in detail. It should be understood that the above are only specific implementation modes of the present invention, and are not used to limit the protection scope of the present invention. On the basis of the technical solution of the present invention, any modification, equivalent replacement, improvement, etc. should be included in the protection scope of the present invention.

Claims (15)

1. A network selection method, characterized in that the method comprises: The terminal equipment resides in the first cell; The terminal device acquires information of N cells, and the information of any one of the cells includes: cell signal strength, cell frequency band, and cell network rate value; The terminal device obtains M cell combinations among the N cells based on the frequency band combination capability information of the terminal device, wherein the frequency band combination capability information includes multiple groups of frequency band combinations, and any cell in the cell combination The frequency band is consistent with one of the frequency band combinations in the multiple groups of frequency band combinations; N and M are both natural numbers; The terminal device obtains, based on the information of each cell in the M cell combinations, a target cell combination in which the combined network rate value of the M cell combinations satisfies a preset condition; When the target cell combination includes a second cell and a third cell, the terminal device is handed over from the first cell to the second cell; When the bandwidth of the terminal device in the second cell does not meet service requirements, add the third cell for the terminal device. 2. The method of claim 1, wherein, The cell network rate value of any cell is obtained by the terminal device from the preset correspondence table based on one or more of the following related information of any cell: cell frequency band, modulation order, carrier number, multiple-input multiple-output MIMO parameters, link direction, subcarrier spacing, bandwidth of a single carrier component CC or the number of carrier component CCs. 3. The method according to claim 1 or 2, wherein, based on the information of each cell in the M cell combinations, the terminal device obtains that the combined network rate value in the M cell combinations satisfies the preset Target cell combinations of conditions, including: The terminal device screens out cell combinations whose cell signal strength is lower than a first threshold value among the M cell combinations to obtain L cell combinations; The terminal device calculates the combined network rate value of the cell combination based on the cell signal strength of each cell in any cell combination and the cell network rate value of each cell; The terminal device traverses the L cell combinations, and calculates combined network rate values of the L cell combinations; The terminal device screens the combined network rate values of the L cell combinations to obtain a target cell combination that satisfies a preset condition. 4. The method according to claim 3, wherein the combined network rate value of any cell combination meets the following conditions: Wherein, R is the combined network rate value of the cell combination; n is the number of cells in the cell combination, P _i is the signal strength percentage of the i-th cell; R _i is the cell network rate value of the i-th cell. 5. The method according to any one of claims 1-4, wherein the target cell combination meeting the preset condition includes the cell combination corresponding to the maximum combined network rate value among the L cell combinations. 6. The method according to claim 1, wherein before the terminal equipment camps on the first cell, the method further comprises: The terminal device detects a network state change event; the network state change event includes at least one of the following: a terminal device power-on event, an airplane mode off event, or a card insertion event. 7. A network selection method, characterized in that the method comprises: The base station instructs the terminal device to camp on the first cell; The base station obtains the information of N cells, and the information of any one of the cells includes: cell signal strength, cell frequency band and cell network rate value; sending, by the base station, first signaling for querying frequency band combination capability information to the terminal device; The base station obtains M cell combinations among the N cells based on the frequency band combination capability information from the terminal device, wherein the frequency band combination capability information includes multiple groups of frequency band combinations, and any cell in the cell combination The frequency band is consistent with one of the frequency band combinations in the multiple groups of frequency band combinations; N and M are both natural numbers; The base station obtains, based on the information of each cell in the M cell combinations, a target cell combination in which the combined network rate value of the M cell combinations satisfies a preset condition; When the target cell combination includes a second cell and a third cell, the base station instructs the terminal device to switch from the first cell to the second cell; When the bandwidth in the second cell does not meet the service requirement, the base station adds the third cell for the terminal device. 8. The method according to claim 7, wherein the cell network rate value of any one cell is a preset correspondence between the base station based on the following one or more related information of any one cell Query in the table to get: Cell frequency band, modulation order, number of carriers, multiple-input multiple-output MIMO parameters, link direction, subcarrier spacing, bandwidth of a single carrier component CC or the number of carrier component CCs. 9. The method according to claim 7 or 8, wherein, based on the information of each cell in the M cell combinations, the base station obtains that the combined network rate value in the M cell combinations meets a preset condition The combination of target communities, including: The base station screens out the cell combinations whose cell signal strength is lower than the first threshold value among the M cell combinations to obtain L cell combinations; The base station calculates the combined network rate value of the cell combination based on the cell signal strength of each cell in any cell combination and the cell network rate value of each cell; The base station traverses the L cell combinations, and calculates combined network rate values of the L cell combinations; The base station screens the combined network rate values of the L cell combinations to obtain a target cell combination that satisfies a preset condition. 10. The method according to claim 9, wherein the combined network rate value in any combination of cells satisfies the following conditions: Wherein, R is the combined network rate value of the cell combination; n is the number of cells in the cell combination, P _i is the signal strength percentage of the i-th cell; R _i is the cell network rate value of the i-th cell. 11. The method according to any one of claims 7-10, wherein the target cell combination meeting the preset condition includes a cell combination corresponding to a maximum combined network rate value among the L cell combinations. 12. The method according to claim 7, wherein before the base station instructs the terminal equipment to camp on the first cell, the method further comprises: The base station receives the network state change event reported by the terminal device; the network state change event includes at least one of the following: terminal device power-on event, flight mode off event, or card insertion event. 13. A terminal device, comprising: a processor and a memory; the memory stores computer-executable instructions; The processor executes the computer-executed instructions stored in the memory, so that the terminal device executes the method according to any one of claims 1-12. 14. A computer-readable storage medium storing a computer program, wherein the computer program implements the method according to any one of claims 1-12 when executed by a processor. 15. A computer program product, characterized by comprising a computer program, when the computer program is executed, the computer is made to execute the method according to any one of claims 1-12.