WO2022057475A1

WO2022057475A1 - Near field communication control method, electronic device, and storage medium

Info

Publication number: WO2022057475A1
Application number: PCT/CN2021/110017
Authority: WO
Inventors: 陈华星
Original assignee: Oppo广东移动通信有限公司
Priority date: 2020-09-17
Filing date: 2021-08-02
Publication date: 2022-03-24
Also published as: CN114202333A

Abstract

A near field communication control method. The method is applied to a first device. The method comprises: upon receipt of a first event generated by an NFC module, disabling a card emulation function of the NFC module, wherein the first event is used to indicate that a radio frequency connection between the NFC module and a second device is cut off; obtaining displacement data of a first device; and when the displacement data satisfies a displacement condition, enabling the card emulation function of the NFC module.

Description

Control method, electronic device and storage medium for near field communication

technical field

The present application relates to the field of communication technologies, and in particular, to a control method for near field communication, an electronic device and a storage medium.

Background technique

Near Field Communication (NFC) is an emerging technology. Devices using NFC technology (such as mobile phones, smart wearable devices, etc.) can exchange data when they are close to each other. At present, many electronic devices such as mobile phones and wearable devices have NFC functions. One of the main applications of these electronic devices with NFC functions in the market is to use NFC to simulate the function of various cards (such as bus cards, bank cards) for numerical resource transfer. . The current NFC technology may have inaccurate transfer of numerical resources.

SUMMARY OF THE INVENTION

The embodiments of the present application disclose a control method, electronic device and storage medium for near field communication, which can accurately use the NFC module to transfer numerical resources and meet the actual needs of users.

An embodiment of the present application discloses a control method for near field communication, which is applied to a first device, and the method includes:

If the first event generated by the near field communication NFC module is received, the card emulation function of the NFC module is turned off, and the first event is used to represent that the NFC module disconnects the radio frequency connection from the second device;

obtaining displacement data of the first device;

When the displacement data satisfies the displacement condition, the card emulation function of the NFC module is enabled.

The embodiment of the present application discloses an electronic device, including a processor and an NFC module, wherein the processor is electrically connected to the NFC module;

The processor is configured to control the NFC module to turn off the card emulation function if a first event generated by the NFC module is received, and the first event is used to represent that the NFC module disconnects the radio frequency from the second device connect;

The processor is further configured to acquire displacement data of the first device, and control the NFC module to enable the card emulation function when the displacement data satisfies the displacement condition.

The embodiment of the present application discloses an electronic device, including a memory and a processor, wherein a computer program is stored in the memory, and when the computer program is executed by the processor, the processor is caused to perform the following steps:

obtaining displacement data of the first device;

The embodiment of the present application discloses a computer-readable storage medium on which a computer program is stored. When the computer program is executed by a processor, the processor is caused to perform the following steps:

obtaining displacement data of the first device;

The details of one or more embodiments of the application are set forth in the accompanying drawings and the description below. Other features and benefits of the present application will emerge from the description, drawings, and claims.

Description of drawings

In order to illustrate the technical solutions in the embodiments of the present application more clearly, the following briefly introduces the drawings required in the embodiments. Obviously, the drawings in the following description are only some embodiments of the present application. For those of ordinary skill in the art, other drawings can also be obtained from these drawings without any creative effort.

1 is an application scenario diagram of a control method for near field communication in one embodiment;

2 is a structural block diagram of an electronic device in one embodiment;

3 is a flowchart of a control method for near field communication in one embodiment;

4 is a structural block diagram of an electronic device in another embodiment;

5 is a structural block diagram of an electronic device in another embodiment;

6 is a flowchart of a control method for near field communication in another embodiment;

7 is a flowchart of a control method for near field communication in another embodiment;

8 is a block diagram of a control device for near field communication in one embodiment;

FIG. 9 is a structural block diagram of an electronic device in another embodiment.

detailed description

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, but not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present application.

It should be noted that the terms "comprising" and "having" in the embodiments of the present application and the accompanying drawings and any modifications thereof are intended to cover non-exclusive inclusion. For example, a process, method, system, product or device comprising a series of steps or units is not limited to the listed steps or units, but optionally also includes unlisted steps or units, or optionally also includes For other steps or units inherent to these processes, methods, products or devices.

It will be understood that the terms "first", "second", etc. used in this application may be used herein to describe various elements, but these elements are not limited by these terms. These terms are only used to distinguish a first element from another element. For example, a first event could be termed a second event, and, similarly, a second event could be termed a first event, without departing from the scope of this application. Both the first event and the second event are events, but they are not the same event.

The NFC technology standard is a short-range (within 10cm) wireless communication technology initiated by Philips (later independent NXP) and jointly promoted by well-known manufacturers such as Nokia and Sony. The working frequency of NFC is usually 13.56MHz. NFC technology can mainly include three different modes: 1. Card simulation mode, which can use electronic devices that support NFC technology as various cards (such as bank cards, bus cards, access control cards, etc.) ), and perform corresponding processing (such as electronic transfer, door opening, etc.) in other NFC radio frequency devices; 2. Card reader mode, through the electronic device that supports NFC technology, it can be used from other tags, stickers, business cards and other media with NFC chips. 3. Point-to-point mode, which can be used for data exchange between different NFC devices, such as exchanging pictures and other data.

When a user uses the card simulation function of the NFC technology of an electronic device, such as taking a bus, subway or other means of transportation, there may be situations where the user swipes the card of the electronic device once but transfers numerical resources (such as deductions) multiple times. The main reason is that when the user puts the electronic device on the NFC card reader to operate, the electronic device may be disconnected from the NFC card reader due to the unstable contactless radio frequency connection and then quickly reconnected. After the NFC connection between the electronic device and the NFC card reader is re-established, a new numerical resource transfer operation will be regenerated, resulting in a situation where the user swipes the card on the electronic device on the NFC card reader once, but multiple numerical resource transfers occur. .

In the related art, it is possible to temporarily turn off the NFC function of the electronic device to avoid repeated transfer of numerical resources, that is, to wait for a period of time before turning on the NFC function. However, when a user wants to transfer numerical resources multiple times (for example, he wants to swipe a card for multiple different people to take a bus), the interval time of the numerical resource transfer operation is limited, which may make the user mistakenly think that the NFC function of the electronic device is abnormal and cannot be fit the actual needs of users.

Embodiments of the present application provide a control method, device, electronic device, and storage medium for near field communication, which can prevent the NFC module from performing multiple numerical resource transfer operations under abnormal conditions, and do not affect the next normal numerical resource transfer. Operation, can accurately use the NFC module to transfer numerical resources, in line with the actual needs of users.

FIG. 1 is an application scenario diagram of a method for controlling near field communication in one embodiment. As shown in FIG. 1 , the electronic device 10 supports the NFC technology, and the electronic device 10 can establish an NFC communication connection with the target device 20 . The electronic device 10 may include, but is not limited to, various electronic devices such as mobile phones, smart wearable devices, and tablet computers. The target device 20 can be an NFC radio frequency device, which has an NFC card reading function, and can read and write information from other media such as tags, stickers, business cards, etc. with NFC chips.

When the NFC module of the electronic device 10 is in the card emulation mode, if the electronic device 10 receives the first event generated by the NFC module, the card emulation function of the NFC module is turned off, wherein the first event is used to characterize the NFC of the electronic device 10 The module disconnects the radio frequency connection from the target device 20 . The electronic device 10 can acquire displacement data, and when the displacement data satisfies the displacement condition, restart the card emulation function of the NFC module.

FIG. 2 is a structural block diagram of an electronic device in one embodiment. As shown in FIG. 2 , in one embodiment, the electronic device 10 may include a power management module (Power Management Unit, PMU) 110 , a processor 120 , an NFC module 130 and an NFC antenna 140 , wherein the PMU 110 may be connected to the processor 120 respectively. It is electrically connected to the NFC module 130 for providing power to the processor 120 and the NFC module 130. The NFC module 130 can be electrically connected to the processor 120 and the NFC antenna 140 respectively, and the NFC antenna 140 can be used to receive the signal sent by the target device and send it to the The target device 20 sends a signal to be transmitted by the NFC module 130 and the like, and the processor 120 can be used to control the NFC module 130 and invoke the functions of the NFC module 130 to perform corresponding operations. Optionally, the processor 120 may include an application processor (Application Processor, AP), a central processing unit (central processing unit, CPU), etc., which are not limited herein. The NFC module 130 may include at least an NFC chip and the like.

In the embodiment of the present application, when the NFC module 130 is in the card emulation mode, if it is detected that the NFC module 130 is disconnected from the NFC communication connection with the target device, the processor 120 may control the NFC module to turn off the card emulation function. The processor 120 can acquire the displacement data of the electronic device 20, and when the displacement data satisfies the displacement condition, can control the NFC module 130 to restart the card emulation function.

It should be noted that the electronic device 10 may include more or less components as shown in FIG. 2 . For example, the electronic device 10 may further include a display module, which is electrically connected to the processor 120 and may be used in the display electronic device 10 The interface of the application and the like are not limited here.

As shown in FIG. 3 , in one embodiment, a method for controlling near field communication is provided, which can be applied to a first device (ie, the electronic device supporting the NFC technology in the above), and the method may include the following steps:

Step 310 , if the first event generated by the near field communication NFC module is received, the card emulation function of the NFC module is turned off, and the first event is used to represent that the NFC module is disconnected from the radio frequency connection with the second device.

The first device may refer to an electronic device that supports NFC technology. In this embodiment of the present application, the first device specifically refers to an electronic device that uses the card emulation function of the NFC module; the second device may refer to a target device. In the embodiments of the present application, the second device may specifically refer to a device having the function of an NFC card reader.

In some embodiments, the user can select a card in an application program running on the first device, and after acquiring the card selected by the user, the first device can call a function function of the NFC module, and pass the function to the NFC module through the function function parameter to control the NFC module to enter card emulation mode. Optionally, the function parameter can be used to configure the mode of the NFC module. Optionally, the functional parameters may include a communication mode, a working mode, etc., but are not limited thereto. Among them, the communication mode can include active communication and passive communication. Active communication means that the NFC module actively turns on the radio frequency field and discovers the surrounding NFC devices. Passive module means that the NFC module does not open the radio frequency field, but sends the signal from other devices. Passive response in RF fields. The working modes may include Poll (discovery mode), Listen (listen mode). As a specific implementation manner, when an application program supporting NFC technology is started, the first device can perform mode configuration on the NFC module according to the started application program. Run the card reader application, configure the NFC module as card reader mode, etc.

The NFC chip in the second device may be in active mode, continuously discovering devices entering its NFC radio frequency field, and sending a Poll command to the discovered devices. When the NFC module of the first device is configured in a card emulation mode, it can be in a passive communication mode, capable of passively responding after entering the radio frequency field of the second device. The NFC module of the first device is configured as Listen, the NFC module will wait to receive the Poll command sent by the second device, and after receiving the command sent by the second device, the second device can establish an NFC communication connection.

After the NFC module of the first device establishes an NFC communication connection with the second device, the first device can perform a value resource transfer operation through the second device. The first device may acquire numerical resource transfer information, which may include user identity credential information, transferred values, etc., wherein the identity credential information may be used to prove the user's identity, such as digital signature, fingerprint information, and the like. The first device can send the numerical resource transfer information to the second device through an NFC signal. After reading the numerical resource transfer information, the second device can upload the numerical resource transfer information to the corresponding server, and complete the numerical resource transfer in the server. operate.

In some embodiments, if the first device does not disconnect the NFC communication connection with the second device after completing the value resource transfer operation, the NFC module can keep the current state and no longer perform the value transfer operation. The value transfer operation will only be performed again when the NFC module of the device is reconnected to the second device.

If the first device receives the first event after completing the numerical resource transfer operation, it can control the NFC module to turn off the card emulation function, and the first event can be used to indicate that the NFC module disconnects the radio frequency connection from the second device. Due to the diversity of NFC card readers and the non-standardization of some NFC card readers, the phenomenon of unstable radio frequency connection coupling between the NFC card reader and the first device may occur. In some embodiments, the NFC module may detect the field strength of the NFC radio frequency field of the second device in real time, and the field strength may refer to the strength of the NFC radio frequency magnetic field emitted by the second device. The NFC module can compare the detected field strength with a preset field strength threshold, and if the detected field strength is less than the preset field strength threshold, trigger a Field on event (that is, the above-mentioned first event). The NFC module judges whether it is stably connected to the second device by detecting the field strength of the NFC radio frequency field, and can accurately detect the unstable phenomenon.

After receiving the Field on event generated by the NFC module, the processor can send a close command (such as the RF_DISCOVER_CMD command) to the NFC module, and the close command can carry the first functional parameter of the card emulation function of the NFC module, and the first functional parameter can be At least the shutdown parameter is included. After receiving the shutdown command, the NFC module can disable the card emulation function according to the first function parameter carried by the shutdown command. The NFC module can return a response command (such as the RF_DISCOVER_RSP command) to the processor, and the processor can learn that the NFC module has disabled the card emulation function according to the response command.

Step 320: Acquire displacement data of the first device.

After the NFC module turns off the card emulation function, the first device can detect whether it is away from the second device. The displacement data of the first device can be acquired, and whether the first device is far away from the second device can be determined according to the displacement data. The displacement data may be the data moved by the electronic device when the card emulation function is turned off relative to NFC, or the data moved by the electronic device when the electronic device performs a transaction relative to NFC, etc., which is not limited herein.

In some embodiments, the processor of the first device may calculate the displacement data according to the position data collected by the acceleration sensor. Optionally, the displacement data may be data moved when the first device performs a transaction with respect to the NFC module, and the like. When the NFC module is activated by the NFC radio frequency field of the second device, the current location information of the first device can be acquired as initial location information.

As a specific implementation manner, after the NFC module of the first device is turned on, it can detect the field strength of the nearby NFC radio frequency field, and when it is detected that the field strength of the nearby NFC radio frequency field is greater than the preset field strength threshold, it indicates that the first device When the device enters the NFC radio frequency field of the second device, the NFC module can trigger and generate a second event (ie, Field on event), and the second event can be used to indicate that the NFC module detects the NFC radio frequency field of the second device. After discovering the first device entering its NFC radio frequency field, the second device may send an activation command (eg RF_INTF_ACTIVATED_NTF command) to the NFC module of the first device to activate the NFC module of the first device. It should be noted that the activation process of the NFC module can be understood as negotiating communication parameters (such as communication mode, transmission rate, etc.). After receiving the activation command sent by the second device, the NFC module of the first device may return a response command to the second device, so as to complete the establishment of an NFC communication connection with the second device. After the NFC module of the first device is activated, data transmission can be performed with the second device.

The first device may acquire real-time location information of the first device after turning off the card emulation function of the NFC module, and calculate displacement data of the real-time location information relative to the initial location information. The processor of the first device may acquire the current location information of the first device from the acceleration sensor as the initial location information when the NFC module receives the activation command. After receiving the first event, the processor sends a close command to the NFC module to control the NFC module to close the card simulation function, and can send a query displacement command to the acceleration sensor after receiving the response command from the NFC module to obtain the latest position of the first device. information. Optionally, the processor may acquire the latest position information of the first device from the acceleration sensor in real time, and the processor may subtract the initial position information from the latest position information of the first device acquired in real time to obtain the displacement of the real-time position information relative to the initial position information. data. In other embodiments, the processor may also acquire the latest location information of the first device from the acceleration sensor at certain time intervals, for example, every 1 second, 2 seconds, etc., which is not limited herein.

In the embodiment of the present application, the initial location information of the first device is acquired when the NFC module is activated, rather than the initial location information of the first device when the second event is received, because the NFC module is activated from the first device The distance between the two devices is relatively short, and the numerical resource transfer operation can be performed normally. However, when the second event is received, it may be far away from the second device, and the initial position information obtained at this time is not accurate enough. Acquiring the initial location information of the first device when the NFC module is activated can improve the accuracy of acquiring location data.

FIG. 4 is a structural block diagram of an electronic device in another embodiment. As shown in FIG. 4 , in one embodiment, the electronic device 10 (ie, the above-mentioned first device) may include a PMU 110 , a processor 120 , an NFC module 130 , an NFC antenna 140 and an acceleration sensor 150 . The PMU 110 may be electrically connected to the processor 120 , the NFC module 130 and the acceleration sensor 150 , respectively, for providing power to the processor 120 , the NFC module 130 and the acceleration sensor 150 . The NFC antenna 140 can be electrically connected to the NFC module 140, and is used for receiving a signal sent by the second device, and sending a signal to be transmitted by the NFC module to the second device, and the like.

The processor 120 may be electrically connected to the NFC module 130 and the acceleration sensor 150, respectively. Optionally, the processor 120 and the NFC module 130 may be connected through I2C (Inter-Integrated Circuit, two-wire serial bus) or SPI (Serial Peripheral Interface, serial peripheral interface), and the processor 120 may communicate with the NFC module 130 The enable signal (VEN) is transmitted to control the NFC module 130 , and the NFC module 130 can transmit an interrupt signal (INT) to the processor 120 . The processor 120 may be connected to the acceleration sensor 150 through I2C, the processor 120 may transmit an enable signal (VEN) to the acceleration sensor 150 to control the acceleration sensor 150 , and the acceleration sensor 150 may also transmit an interrupt signal to the processor 120 . The acceleration sensor 150 can be used to collect data such as the moving direction and offset of the electronic device.

After the NFC module 130 receives the activation command sent by the second device, the processor 120 can obtain the current position information from the acceleration sensor 150 as the initial position information (X0, Y0, Z0), and control the NFC module 130 to transmit the corresponding information to the second device. data to perform value resource transfer operations. When the NFC module 130 triggers the generation of the first event, the processor 120 receives the first event generated by the NFC module 130, obtains the real-time position information (X1, Y1, Z1) of the electronic device from the acceleration sensor 150, and calculates the real-time position information The displacement data of (X1, Y1, Z1) relative to the initial position information (X0, Y0, Z0), so that the electronic device 10 can be determined to be far away from the second device according to the displacement data.

FIG. 5 is a structural block diagram of an electronic device in another embodiment. As shown in FIG. 5 , compared to FIG. 4 , the electronic device (ie, the above-mentioned first device) not only includes the PMU 110 , the processor 120 , the NFC module 130 , the NFC antenna 140 , and the acceleration sensor 150 , but also includes a coprocessor 160 . PMU 110 may be electrically connected to coprocessor 160 to provide power to coprocessor 160 . The coprocessor 160 may be electrically connected to the processor 120 and the acceleration sensor 150, respectively, for processing the position information of the acceleration sensor 150 to obtain displacement data. Optionally, the coprocessor 160 and the acceleration sensor 150 can be connected through I2C, and the processor 120 can be connected through I2C or SPI. After the NFC module 130 receives the activation command sent by the second device, the processor 120 may send a position acquisition command to the coprocessor 160, and the coprocessor 160 may acquire the current position information from the acceleration sensor 150 as the initial position information according to the acquisition command (X0, Y0, Z0). When the processor 120 receives the first event generated by the NFC module 130, it can send a displacement acquisition command to the coprocessor 160, and the coprocessor 160 can acquire the real-time position information of the electronic device from the acceleration sensor 150 according to the displacement acquisition command (X1 , Y1, Z1), and calculate the displacement data of the real-time position information (X1, Y1, Z1) relative to the initial position information (X0, Y0, Z0). The coprocessor 160 may send the calculated displacement data to the processor 120, and the processor 120 then determines whether the electronic device is far away from the second device according to the displacement data. By adding a co-processor 160 to the processor 120 and the acceleration sensor 150 to process the data of the acceleration sensor 150, the data processing pressure of the processor 120 can be relieved, and the processing efficiency can be improved.

It should be noted that the above-mentioned processor and co-processor can also directly obtain the raw data (moving direction, offset, etc.) collected by the acceleration sensor, and process the raw data to obtain the position information of the first device. In addition to the acceleration sensor, the position information of the first device may also be acquired through other sensors, such as an inertial measurement unit (Inertial Measurement Unit, IMU), etc., but not limited to this.

In some embodiments, the location information of the first device when the NFC module disables the card emulation function can also be used as the initial location information, and the method of acquiring the displacement data can be the same as that described in the above-mentioned embodiments, which will not be repeated here. .

Step 330, when the displacement data satisfies the displacement condition, enable the card simulation function of the NFC module.

As another implementation manner, the displacement data may include a displacement distance and a displacement direction, the displacement distance may be a difference between the real-time location information of the first device and the initial location information, and the displacement direction refers to the distance from the initial location information Directions to this real-time location information. In some embodiments, the displacement condition may include that the displacement distance is greater than the distance threshold, and the displacement direction is a direction away from the second device, that is, the real-time location information of the first device is moving away from the initial location information relative to the initial location information. direction of the second device. When the displacement distance is greater than the distance threshold, and the displacement direction is in the direction away from the second device, it means that the first device has moved in the direction away from the second device by a relatively large amount, which is in line with the user after completing the transfer of the card's numerical resources. The actual action can be used to restart the card emulation function of the NFC module.

Optionally, during the movement of the first device, the displacement direction of the first device may be a direction in which the first device approaches the second device first and then moves away from the second device relative to the second device. If the obtained displacement direction is the direction of approaching and then moving away from the second device, if the displacement distance is greater than the distance threshold, it can be determined whether the distance difference between the displacement distance and the distance threshold exceeds the set range. If the range is set, it means that the range of movement of the first device is relatively large, then it can be determined that the displacement data satisfies the displacement condition, and the card emulation function of the NFC module is re-enabled. If the difference between the displacement distance and the distance threshold is within the set range, it means that the first device is far away from the second device after receiving the second device. In order to prevent misjudgment, the numerical resource transfer operation is repeated. , it can be determined that the displacement data does not meet the displacement conditions, and the card emulation function of the NFC module is not enabled for the time being.

Optionally, the above-mentioned distance threshold may be a preset fixed value, such as 10 cm, 15 cm, 18 cm, 20 cm, etc., which is not limited herein. In some embodiments, the distance threshold may also be determined according to the distance between the first device and the second device during the numerical resource transfer operation, if the distance between the first device and the second device during the numerical resource transfer operation is If the distance is smaller, the first device needs to move a larger distance to be far away from the second device, and the corresponding distance threshold may be larger. If the distance between the first device and the second device is large when the numerical resource transfer operation is performed, and the first device needs to move a small distance to be far away from the second device, the corresponding distance threshold may be small.

Further, when the NFC module is activated by the NFC radio frequency field of the second device, the field strength of the NFC radio frequency field detected by the NFC module can be obtained, and the distance threshold can be determined according to the field strength, and the distance threshold can be positively correlated with the field strength. The larger the field strength of the NFC radio frequency field detected by the NFC module, the closer the distance between the first device and the second device, and the larger the distance threshold can be. The smaller the field strength of the NFC radio frequency field detected by the NFC module, the farther the distance between the first device and the second device is, and the smaller the distance threshold can be. By estimating the distance between the first device and the second device according to the field strength of the NFC radio frequency field detected when the NFC module is activated, thereby determining the distance threshold, it is possible to more accurately detect whether the first device is far from the second device.

In one embodiment, after the card emulation function of the NFC module is turned off, if the displacement data of the first device is not obtained within a certain period of time, the card emulation function of the NFC module can be turned on. After the processor of the first device controls the NFC module to turn off the card emulation function, if the real-time location information of the first device is not obtained from the acceleration sensor within a certain period of time, it may be determined that the acceleration sensor is abnormal. At this time, in order to prevent the card emulation function of the NFC module from being turned off after being turned off due to the failure of the acceleration sensor, the card emulation function of the NFC module can be directly turned on again, and the error information of the acceleration sensor can be reported. After receiving the reported error information, the main processor of the first device may perform operations such as resetting the acceleration sensor, so as to solve the abnormal condition of the acceleration sensor. By delaying the opening of the card emulation function of the NFC module, the situation that the card emulation function of the NFC module cannot be turned on after being turned off due to an error in the acceleration sensor can be avoided.

In the embodiment of the present application, the card emulation function of the NFC module is directly turned off when the radio frequency connection between the NFC module and the second device is disconnected, which can prevent the NFC module from performing multiple numerical resource transfer operations under abnormal conditions. The displacement data of a device can accurately detect whether the first device is far away from the second device, so that after the first device is far away from the second device, the card emulation function of the NFC module can be restarted without affecting the next normal value resource transfer operation, and the NFC can be used accurately. The module transfers numerical resources to meet the actual needs of users.

As shown in FIG. 6 , in one embodiment, another method for controlling near field communication is provided, which can be applied to the above-mentioned first device, and the method may include the following steps:

Step 602 , if the first event generated by the near field communication NFC module is received, the card emulation function of the NFC module is turned off, and the first event is used to represent that the NFC module disconnects the radio frequency connection from the second device.

For the description of step 602, reference may be made to the related description of step 310 in the foregoing embodiment, and details are not repeated here.

In some embodiments, before step 602, the method further includes: acquiring the card type selected by the application program, and if the card type is a resource transfer type, step 602 is performed.

The user can select a card that needs to perform a corresponding function in an application program running on the first device, and the processor of the first device can acquire the card type to which the selected card in the application program belongs. Optionally, the card type may include a resource transfer type and an authority verification type, where the resource transfer type refers to a card that can transfer numerical resources, such as a bank card, wallet card, payment card, discount card, etc., and the authority verification type refers to the card. It is a card that can be used for authorization confirmation, such as access control card, digital car key, ID card, etc. Since the authorization verification type card does not have the scenario of repeating the numerical resource transfer operation, if the card type to which the selected card belongs is the authorization verification type, the card emulation function of the NFC module may not be turned off when the first event is received. Unnecessary data processing processes (such as obtaining displacement data, etc.) can be avoided, the data processing pressure of the processor can be reduced, and the power consumption of the first device can be reduced.

If the card type to which the selected card belongs is a resource transfer type, in order to avoid repeated numerical resource transfer operations, the card emulation function of the NFC module can be turned off when the first event is received.

In some embodiments, when the NFC module of the first device is in a card emulation mode, the first device can perform a value resource transfer operation through the second device. If the processor of the first device receives the first event, it can determine whether the numerical resource transfer operation is completed. If the numerical resource transfer operation is not completed, for example, the NFC module has not successfully sent the numerical resource transfer information to the second device. If the second device disconnects the communication connection, the card emulation function of the NFC module may not be turned off, and after the NFC module and the second device re-establish the NFC communication connection, the numerical resource transfer operation is performed again. It can ensure the normal operation of the transfer operation of the numerical resource.

Step 604, when it is detected that the first device leaves the NFC radio frequency field range of the second device, enable the card emulation function of the NFC module.

As an implementation manner, when the NFC module disables the card emulation function, it may only disable the function of the NFC module sending data to other NFC card readers, and other NFC card readers can still discover the first device. At this time, the NFC module is equivalent to returning to the initialization state and is in the Listen listening mode. If the NFC module receives the Poll discovery command sent by the second device, it can be determined that the first device is still within the NFC radio frequency field of the second device. If the NFC module has not received the Poll discovery command sent by the second device for a period of time, Then, it can be determined that the first device leaves the range of the NFC radio frequency field of the second device, wherein the period of time can be set according to actual requirements, for example, 3 seconds, 10 seconds, and the like.

In some embodiments, when the card emulation function of the NFC module is turned off, the first device can detect whether the first device moves through the acceleration sensor, and if the first device moves, it can further determine whether to leave the NFC radio of the second device. field range. Optionally, the first device can turn on the camera, and use the camera to capture an image of the surrounding environment, and can perform object recognition on the image of the surrounding environment, and determine according to the characteristics of the second device (such as NFC identification, card swiping image, etc.) The image position in the surrounding environment image, and the distance between the first device and the second device is determined according to the image position. If it is detected that the distance between the first device and the second device is greater than a certain threshold according to the surrounding environment image captured by the camera, it can be determined that the first device leaves the NFC radio frequency field range of the second device, and the threshold can be determined according to the NFC radio frequency of the second device. The range of the radio frequency field can be set, for example, it can be uniformly set to 15 cm, or it can be adjusted when the radiation energy of the NFC coil of the second device is strong, such as set to 20 cm, etc., which is not limited here.

As a specific implementation manner, when the first device detects that it leaves the NFC radio frequency field range of the second device, the processor can re-send an opening command (such as the RF_DISCOVER_CMD command) to the NFC module, and the opening command can carry the card simulation of the NFC module. The second function parameter of the function, the second function parameter may include at least the opening parameter. After receiving the opening command, the NFC module can enable the card emulation function according to the second function parameter carried by the command, and establishes the card simulation function with the NFC card reader. After the NFC communication is connected, the numerical resource transfer operation can be performed again.

In the embodiment of the present application, when the near field communication NFC module of the first device is in the card emulation mode, if the first event representing the disconnection of the radio frequency connection between the NFC module and the second device is received, the card emulation function of the NFC module is turned off , and when it is detected that the first device leaves the NFC radio frequency field of the second device, the card emulation function of the NFC module is turned on, and the card emulation function of the NFC module is directly turned off when the NFC module is disconnected from the radio frequency connection of the second device, which can avoid The NFC module performs multiple numerical resource transfer operations under abnormal conditions, and after detecting that the first device is far away from the second device, restarting the card simulation function of the NFC module does not affect the next normal numerical resource transfer operation. Use the NFC module to transfer numerical resources to meet the actual needs of users.

As shown in FIG. 7 , in one embodiment, another method for controlling near field communication is provided, which can be applied to the above-mentioned electronic device, and the method may include the following steps:

Step 702, classify the cards in the application.

Step 704, determine whether the resource transfer type is selected, if yes, go to step 708, if not, go to step 706.

In step 706, the authority confirmation is performed normally.

In step 708, a Field on event is received, and a signal is transmitted with the target device until an activation command is received.

Step 710 , query the acceleration sensor for the position coordinates of the electronic device at this time, and mark it as the initial position point.

In step 712, the transfer operation of the numerical resource is completed, and the NFC communication connection is maintained.

Step 714, determine whether a Field off event is received, if yes, go to step 716, if not, go to step 712.

Step 716: Send a shutdown command to the NFC chip to disable the card emulation function.

Step 718 , query the acceleration sensor for the real-time position coordinates of the electronic device, and calculate the displacement relative to the initial position point.

Step 720, determine whether the displacement is greater than the distance threshold, if yes, go to step 722, if not, go to step 718.

Step 722: Send an opening command to the NFC chip to enable the card emulation function.

For the description of steps 702 to 722, reference may be made to the relevant descriptions in the foregoing embodiments, and details are not repeated here.

As shown in FIG. 8 , in one embodiment, a control apparatus 800 for near field communication is provided, which can be applied to the above-mentioned first device. The control apparatus 800 for near field communication may include a closing module 810 and a displacement acquiring module 820 and the opening module 830.

The closing module 810 is configured to close the card emulation function of the NFC module if a first event generated by the NFC module is received, and the first event is used to represent the disconnection of the radio frequency connection between the NFC module and the second device.

In one embodiment, the closing module 810 is further configured to obtain the card type selected by the application. If the card type is the resource transfer type, the card emulation function of the NFC module is turned off when the first event generated by the NFC module is received.

The displacement acquiring module 820 is configured to acquire displacement data of the first device.

In one embodiment, the displacement acquiring module 820 is further configured to acquire the current location information of the first device as the initial location information when the NFC module is activated by the NFC radio frequency field of the second device, and close the NFC module through the closing module 810 After the card simulation function of the first device is performed, the real-time position information of the first device is obtained, and the displacement data of the real-time position information relative to the initial position information is calculated.

The enabling module 830 is used for enabling the card emulation function of the NFC module when the displacement data satisfies the displacement condition.

In one embodiment, the displacement data includes displacement distance and displacement direction. The enabling module 830 is further configured to enable the card emulation function of the NFC module when the displacement distance is greater than the distance threshold and the displacement direction is a direction away from the second device.

In one embodiment, the above-mentioned control device 800 for near field communication further includes a field intensity detection module and a threshold determination module.

The field strength detection module is configured to acquire the field strength of the NFC radio frequency field detected by the NFC module when the NFC module is activated by the NFC radio frequency field of the second device.

The threshold value determination module is used to determine the distance threshold value according to the field strength, and the distance threshold value has a positive correlation with the field strength.

In one embodiment, the enabling module 830 is further configured to enable the card emulation function of the NFC module if the displacement acquiring module does not acquire displacement data of the first device within a certain period of time.

In one embodiment, the control device 800 for the above-mentioned near field communication, in addition to the closing module 810 , the displacement obtaining module 820 , the opening module 830 , the field strength detection module and the threshold determination module, also includes a type obtaining module.

The type obtaining module is used to obtain the card type selected by the application.

The closing module 810 is further configured to close the card emulation function of the NFC module if the first event generated by the near field communication NFC module is received when the card type is the resource transfer type.

The enabling module 830 is further configured to enable the card emulation function of the NFC module when it is detected that the first device leaves the NFC radio frequency field range of the second device.

FIG. 9 is a structural block diagram of an electronic device in another embodiment. As shown in FIG. 9 , the electronic device may include: a radio frequency module 910, a memory 920, an input unit 930, a display unit 940, a sensor 950, an audio circuit 960, a WiFi (Wireless Fidelity, wireless fidelity) module 970, a processor 980, and Power supply 990 and other components. Those skilled in the art can understand that the structure of the electronic device shown in FIG. 9 does not constitute a limitation on the electronic device, and the electronic device may include more or less components than the one shown, or combine some components, or different components layout.

The radio frequency module 910 can be used for receiving and sending signals during sending and receiving of information or during a call. In particular, after receiving the downlink information of the base station, the processor 980 processes it; in addition, it sends the designed uplink data to the base station. Generally, the radio frequency module 910 includes, but is not limited to, an antenna, at least one amplifier, a transceiver, a coupler, a low noise amplifier (LNA), a duplexer, and the like. In addition, the radio frequency module 910 can also communicate with the network and other devices through wireless communication. The above-mentioned wireless communication can use any communication standard or protocol, including but not limited to the global system of mobile communication (global system of mobile communication, GSM), general packet radio service (general packet radio service, GPRS), code division multiple access (code division multiple access) multiple access, CDMA), wideband code division multiple access (wideband code division multiple access, WCDMA), long-term evolution, e-mail, short message service (short messaging service, SMS) and so on.

The memory 920 may be used to store software programs and modules, and the processor 980 executes various functional applications and data processing of the electronic device by running the software programs and modules stored in the memory 920 . The memory 920 may mainly include a stored program area and a stored data area, wherein the stored program area may store an operating system, an application program required for at least one function (such as a sound playback function, an image playback function, etc.), etc.; Data created by the use of electronic equipment (such as audio data, phone book, etc.), etc. Additionally, memory 920 may include high-speed random access memory, and may also include non-volatile memory, such as at least one magnetic disk storage device, flash memory device, or other volatile solid state storage device.

The input unit 930 may be used to receive input numerical or character information, and generate key signal input related to user settings and function control of the electronic device. Specifically, the input unit 930 may include a touch panel 932 and other input devices 934 . Touch panel 932, also referred to as a touch screen, collects touch operations by a user on or near it (such as a user's finger, stylus, etc., any suitable object or accessory on or near touch panel 932). operation), and drive the corresponding connection device according to the preset program. Optionally, the touch panel 932 may include two parts, a touch detection device and a touch controller. Among them, the touch detection device detects the user's touch orientation, detects the signal brought by the touch operation, and transmits the signal to the touch controller; the touch controller receives the touch information from the touch detection device, converts it into contact coordinates, and then sends it to the touch controller. To the processor 980, and can receive the command sent by the processor 980 and execute it. In addition, the touch panel 932 can be implemented in various types such as resistive, capacitive, infrared, and surface acoustic waves. In addition to the touch panel 932 , the input unit 930 may also include other input devices 934 . Specifically, other input devices 934 may include, but are not limited to, one or more of physical keyboards, function keys (such as volume control keys, switch keys, etc.), trackballs, mice, joysticks, and the like.

The display unit 940 may be used to display information input by the user or information provided to the user and various menus of the electronic device. The display unit 940 may include a display panel 942. Optionally, the display panel 942 may be configured in the form of a liquid crystal display (LCD), an organic light-emitting diode (OLED), or the like. Further, the touch panel 932 can cover the display panel 942, and when the touch panel 932 detects a touch operation on or near it, it transmits it to the processor 980 to determine the type of the touch event, and then the processor 980 determines the type of the touch event according to the touch event. Type provides corresponding visual output on display panel 942 . Although in FIG. 9, the touch panel 932 and the display panel 942 are used as two independent components to realize the input and input functions of the electronic device, in some embodiments, the touch panel 932 and the display panel 942 may be integrated And realize the input and output functions of electronic equipment.

The electronic device may also include at least one sensor 950, such as light sensors, motion sensors, and other sensors. Specifically, the light sensor may include an ambient light sensor and a proximity sensor, wherein the ambient light sensor may adjust the brightness of the display panel 942 according to the brightness of the ambient light, and the proximity sensor may turn off the display panel 942 and the display panel 942 when the electronic device is moved to the ear. / or backlight. As a type of motion sensor, the accelerometer sensor can detect the magnitude of acceleration in all directions (generally three axes), and can detect the magnitude and direction of gravity when stationary, and can be used for applications that recognize the posture of electronic devices (such as horizontal and vertical screen switching, related games, magnetometer attitude calibration), vibration recognition related functions (such as pedometer, tapping), etc.; as for other sensors such as gyroscopes, barometers, hygrometers, thermometers, infrared sensors, etc. that can be configured on electronic devices, here No longer.

Audio circuitry 960, speakers 962, and microphones 964 may provide an audio interface between the user and the electronic device. The audio circuit 960 can convert the received audio data into an electrical signal, and transmit it to the speaker 962, and the speaker 962 converts it into a sound signal for output; on the other hand, the microphone 964 converts the collected sound signal into an electrical signal, which is converted by the audio circuit 960 After receiving, it is converted into audio data, and then the audio data is output to the processor 980 for processing, and then sent to, for example, another electronic device through the radio frequency module 910, or the audio data is output to the memory 920 for further processing.

WiFi is a short-distance wireless transmission technology, and the electronic device can help users to send and receive emails, browse web pages, and access streaming media through the WiFi module 970, which provides users with wireless broadband Internet access.

The processor 980 is the control center of the electronic device, using various interfaces and lines to connect various parts of the entire electronic device, by running or executing the software programs and/or modules stored in the memory 920, and calling the data stored in the memory 920. , perform various functions of electronic equipment and process data, so as to monitor electronic equipment as a whole. Optionally, the processor 980 may include one or more processing units; preferably, the processor 980 may integrate an application processor and a modem processor, wherein the application processor mainly processes the operating system, user interface, and application programs, etc. , the modem processor mainly deals with wireless communication. It can be understood that, the above-mentioned modulation and demodulation processor may not be integrated into the processor 980. In one embodiment, the computer program stored in the memory 920, when executed by the processor 980, causes the processor 980 to implement the methods described in the above embodiments.

The electronic device also includes a power supply 990 (such as a battery) for supplying power to various components. Preferably, the power supply can be logically connected to the processor 980 through a power management system, so as to manage charging, discharging, and power consumption management functions through the power management system. Although not shown, the electronic device may further include a camera, a Bluetooth module, and the like, which will not be repeated here.

The embodiments of the present application disclose a computer-readable storage medium, which stores a computer program, wherein, when the computer program is executed by a processor, the methods described in the foregoing embodiments are implemented.

The embodiments of the present application disclose a computer program product, the computer program product includes a non-transitory computer-readable storage medium storing a computer program, and the computer program can be executed by a processor to implement the methods described in the foregoing embodiments.

Those of ordinary skill in the art can understand that all or part of the processes in the methods of the above embodiments can be implemented by instructing relevant hardware through a computer program, and the program can be stored in a non-volatile computer-readable storage medium , when the program is executed, it may include the flow of the above-mentioned method embodiments. Wherein, the storage medium may be a magnetic disk, an optical disk, a read-only memory (Read-Only Memory, ROM), and the like.

Any reference to a memory, storage, database or other medium as used herein may include non-volatile and/or volatile memory. Suitable nonvolatile memory may include read only memory (ROM), programmable ROM (PROM), electrically programmable ROM (EPROM), electrically erasable programmable ROM (EEPROM), or flash memory. Volatile memory may include random access memory (RAM), which acts as external cache memory. By way of illustration and not limitation, RAM is available in various forms such as static RAM (SRAM), dynamic RAM (DRAM), synchronous DRAM (SDRAM), double data rate SDRAM (DDR SDRAM), enhanced SDRAM (ESDRAM), synchronous Link (Synchlink) DRAM (SLDRAM), Memory Bus (Rambus) Direct RAM (RDRAM), Direct Memory Bus Dynamic RAM (DRDRAM), and Memory Bus Dynamic RAM (RDRAM).

It is to be understood that reference throughout the specification to "one embodiment" or "an embodiment" means that a particular feature, structure or characteristic associated with the embodiment is included in at least one embodiment of the present application. Thus, appearances of "in one embodiment" or "in an embodiment" in various places throughout this specification are not necessarily necessarily referring to the same embodiment. Furthermore, the specific features, structures or characteristics may be combined in any suitable manner in one or more embodiments. Those skilled in the art should also know that the embodiments described in the specification are all optional embodiments, and the actions and modules involved are not necessarily required by the present application.

In the various embodiments of the present application, it should be understood that the size of the sequence numbers of the above-mentioned processes does not imply an inevitable sequence of execution, and the execution sequence of each process should be determined by its functions and internal logic, and should not be implemented in the present application. The implementation of the examples constitutes no limitation.

The units described above as separate components may or may not be physically separated, and components displayed as units may or may not be object units, and may be located in one place or distributed to multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution in this embodiment.

In addition, each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist physically alone, or two or more units may be integrated into one unit. The above-mentioned integrated units may be implemented in the form of hardware, or may be implemented in the form of software functional units.

The above-mentioned integrated units, if implemented in the form of software functional units and sold or used as stand-alone products, may be stored in a computer-accessible memory. Based on this understanding, the technical solution of the present application, or the part that contributes to the prior art, or the whole or part of the technical solution, can be embodied in the form of a software product, and the computer software product is stored in a memory , including several requests to cause a computer device (which may be a personal computer, a server, or a network device, etc., specifically a processor in the computer device) to execute some or all of the steps of the above methods in the various embodiments of the present application.

The control method, device, electronic device, and storage medium for near field communication disclosed in the embodiments of the present application have been described in detail above. The principles and implementations of the present application are described with specific examples. The descriptions are only used to aid in understanding the methodology of the present application and its core ideas. At the same time, for those skilled in the art, according to the idea of the present application, there will be changes in the specific embodiments and application scope. To sum up, the content of this specification should not be construed as a limitation to the present application.

Claims

A control method for near field communication, characterized by being applied to a first device, the method comprising:

If the first event generated by the near field communication NFC module is received, the card emulation function of the NFC module is turned off, and the first event is used to represent that the NFC module disconnects the radio frequency connection from the second device;

obtaining displacement data of the first device;

When the displacement data satisfies the displacement condition, the card emulation function of the NFC module is enabled.
The method according to claim 1, characterized in that, before disabling the card emulation function of the NFC module if the first event generated by the near field communication NFC module is received, the method further comprises:

When the NFC module is activated by the NFC radio frequency field of the second device, obtain the current location information of the first device as the initial location information;

The acquiring displacement data of the first device includes:

Acquire real-time position information of the first device, and calculate displacement data of the real-time position information relative to the initial position information.
The method according to claim 2, wherein the displacement data includes a displacement distance and a displacement direction; and when the displacement data meets a displacement condition, enabling a card emulation function of the NFC module, comprising:

When the displacement distance is greater than the distance threshold and the displacement direction is a direction away from the second device, the card emulation function of the NFC module is enabled.
The method according to claim 3, characterized in that, before disabling the card emulation function of the NFC module if the first event generated by the near field communication NFC module is received, the method further comprises:

When the NFC module is activated by the NFC radio frequency field of the second device, acquiring the field strength of the NFC radio frequency field detected by the NFC module;

A distance threshold is determined according to the field strength, and the distance threshold has a positive correlation with the field strength.
The method according to claim 1, wherein after disabling the card emulation function of the NFC module, the method further comprises:

If the displacement data of the first device is not obtained within a certain period of time, the card emulation function of the NFC module is enabled.
The method according to claim 1, characterized in that, before disabling the card emulation function of the NFC module if the first event generated by the near field communication NFC module is received, the method further comprises:

Get the card type selected by the application;

If the card type is the resource transfer type, executing the step of turning off the card emulation function of the NFC module if the first event generated by the near field communication NFC module is received.
The method according to claim 1, wherein after disabling the card emulation function of the NFC module, the method further comprises:

When it is detected that the first device leaves the NFC radio frequency field range of the second device, the card emulation function of the NFC module is enabled.
An electronic device, comprising a processor and an NFC module, wherein the processor is electrically connected to the NFC module;

The processor is configured to control the NFC module to turn off the card emulation function if a first event generated by the NFC module is received, and the first event is used to represent that the NFC module disconnects the radio frequency from the second device connect;

The processor is further configured to acquire displacement data of the first device, and control the NFC module to enable the card emulation function when the displacement data satisfies the displacement condition.
An electronic device, characterized by comprising a memory and a processor, wherein a computer program is stored in the memory, and when the computer program is executed by the processor, the processor is caused to perform the following steps:

If the first event generated by the near field communication NFC module is received, the card emulation function of the NFC module is turned off, and the first event is used to represent that the NFC module disconnects the radio frequency connection from the second device;

obtaining displacement data of the first device;

When the displacement data satisfies the displacement condition, the card emulation function of the NFC module is enabled.
The electronic device according to claim 9, characterized in that, when the computer program is executed by the processor, the processor causes the processor to execute the process if the first event generated by the near field communication (NFC) module is received. Before the step of turning off the card emulation function of the NFC module, the step is also performed: when the NFC module is activated by the NFC radio frequency field of the second device, acquiring the current location information of the first device as the initial location information;

The acquiring displacement data of the first device includes:

Acquire real-time position information of the first device, and calculate displacement data of the real-time position information relative to the initial position information.
The electronic device according to claim 10, wherein the displacement data includes a displacement distance and a displacement direction; when the displacement data satisfies a displacement condition, enabling a card simulation function of the NFC module, comprising:

When the displacement distance is greater than the distance threshold and the displacement direction is a direction away from the second device, the card emulation function of the NFC module is enabled.
The electronic device according to claim 11, characterized in that, when the computer program is executed by the processor, the processor causes the processor to execute the process if the first event generated by the near field communication (NFC) module is received. Before the step of disabling the card emulation function of the NFC module, the following steps are also performed:

When the NFC module is activated by the NFC radio frequency field of the second device, acquiring the field strength of the NFC radio frequency field detected by the NFC module;

A distance threshold is determined according to the field strength, and the distance threshold has a positive correlation with the field strength.
The electronic device according to claim 9, wherein when the computer program is executed by the processor, the processor further executes the step of disabling the card emulation function of the NFC module after executing the step of turning off the card emulation function of the NFC module. Follow the steps below:

If the displacement data of the first device is not obtained within a certain period of time, the card emulation function of the NFC module is enabled.
The electronic device according to claim 9, characterized in that, when the computer program is executed by the processor, the processor causes the processor to execute the process if the first event generated by the near field communication (NFC) module is received. Before the step of disabling the card emulation function of the NFC module, the following steps are also performed:

Get the card type selected by the application;

If the card type is the resource transfer type, executing the step of turning off the card emulation function of the NFC module if the first event generated by the near field communication NFC module is received.
The electronic device according to claim 9, wherein when the computer program is executed by the processor, the processor further executes the following steps after executing the step of turning off the card emulation function of the NFC module :

When it is detected that the first device leaves the NFC radio frequency field range of the second device, the card emulation function of the NFC module is enabled.
A computer-readable storage medium on which a computer program is stored, characterized in that, when the computer program is executed by a processor, the processor is caused to perform the following steps:

If the first event generated by the near field communication NFC module is received, the card emulation function of the NFC module is turned off, and the first event is used to represent that the NFC module disconnects the radio frequency connection from the second device;

obtaining displacement data of the first device;

When the displacement data satisfies the displacement condition, the card emulation function of the NFC module is enabled.
The computer-readable storage medium according to claim 16, wherein when the computer program is executed by the processor, the processor causes the processor to execute the first output generated by the NFC module if the near field communication is received. event, before the step of turning off the card emulation function of the NFC module, the step is also performed: when the NFC module is activated by the NFC radio frequency field of the second device, acquiring the current location information of the first device as the initial location information;

The acquiring displacement data of the first device includes:

Acquire real-time position information of the first device, and calculate displacement data of the real-time position information relative to the initial position information.
The computer-readable storage medium according to claim 17, wherein the displacement data includes a displacement distance and a displacement direction; when the displacement data meets a displacement condition, the card simulation function of the NFC module is enabled, include:

When the displacement distance is greater than the distance threshold and the displacement direction is a direction away from the second device, the card emulation function of the NFC module is enabled.
The computer-readable storage medium according to claim 18, wherein when the computer program is executed by the processor, the processor causes the processor to execute the first output generated by the NFC module if the near field communication is received. event, before the step of turning off the card emulation function of the NFC module, the following steps are also performed:

When the NFC module is activated by the NFC radio frequency field of the second device, acquiring the field strength of the NFC radio frequency field detected by the NFC module;

A distance threshold is determined according to the field strength, and the distance threshold has a positive correlation with the field strength.
17. The computer-readable storage medium of claim 16, wherein the computer program, when executed by the processor, causes the processor to perform the step of turning off the card emulation function of the NFC module after the processor is executed. , and also perform the following steps:

If the displacement data of the first device is not obtained within a certain period of time, the card emulation function of the NFC module is enabled.
The computer-readable storage medium according to claim 16, wherein when the computer program is executed by the processor, the processor causes the processor to execute the first output generated by the NFC module if the near field communication is received. event, before the step of turning off the card emulation function of the NFC module, the following steps are also performed:

Get the card type selected by the application;

If the card type is the resource transfer type, executing the step of turning off the card emulation function of the NFC module if the first event generated by the near field communication NFC module is received.
The computer-readable storage medium according to claim 16, wherein when the computer program is executed by the processor, after the processor performs the step of turning off the card emulation function of the NFC module, the processor further Perform the following steps:

When it is detected that the first device leaves the NFC radio frequency field range of the second device, the card emulation function of the NFC module is enabled.