Near field communication method and device

Abstract

One or more embodiments of the present description provide a near field communication method and device. The near field communication device can detect detection signals emitted by a card reader device in a low-power card detection mode; and when it is detected that the transmission state of a first detection signal satisfies a condition for signal interference and superposition, the near field communication device emits a disturbance signal, so that the disturbance signal can interfere and superimpose with the first detection signal, causing the card reader device to exit the low-power card detection mode.

Description

Near field communication method and device

[0001] This application claims priority to the Chinese Patent Application No. 202411107032.1 filed on August 13, 2024, and entitled "Near field communication method and device", the content of which is incorporated herein by reference in its entirety. TECHNICAL FIELD

[0002] One or more embodiments of the present specification relate to the technical field of near field communication, and in particular to a near field communication method and device. BACKGROUND

[0003] Near field communication (NFC) is a short-range wireless communication technology that enables non-contact data transmission between two devices within a short distance, providing a safe and fast communication method for electronic devices.

[0004] In an NFC application scenario in which a terminal device such as a mobile phone is used as a card reader, the mobile phone can read the tag information of an NFC tag. If repeated attempts are required to successfully read the tag information during the process of reading the tag information by the mobile phone, the user experience is seriously affected. Therefore, a solution is needed to improve the success rate of reading the tag information by the mobile phone.

[0005] SUMMARY

[0006] To improve the success rate of reading the tag information by the mobile phone, one or more embodiments of the present specification provide a near field communication method and device.

[0007] In a first aspect, one or more embodiments of the present specification provide a near field communication method applied to a near field communication device, the method comprising: detecting a probe signal transmitted by a card reading device in a low-power card detection mode; in a case where a transmission state of a first probe signal meets a condition of interference superposition signals, transmitting a disturbance signal to make the disturbance signal interfere with the first probe signal to make the card reading device exit the low-power card detection mode.

[0008] In a possible implementation, the detecting the probe signal transmitted by the card reading device in the low-power card detection mode comprises: determining whether first characteristic information is detected; the first characteristic information is characteristic information of the probe signal transmitted by the card reading device in the low-power card detection mode; in a case where it is determined that the first characteristic information is detected, it is determined that the first probe signal is detected; monitoring a rising edge jump event based on a level of the first probe signal; in a case where the rising edge jump event is monitored, it is determined that the transmission state of the first probe signal meets the condition of interference superposition signals.

[0009] In a possible implementation, the transmitting the disturbance signal in the case where the transmission state of the first probe signal meets the condition of interference superposition of signals comprises: determining target disturbance signal parameters in the case where the transmission state of the first probe signal meets the condition of interference superposition of signals; generating a disturbance signal based on the target disturbance signal parameters; and transmitting the disturbance signal.

[0010] In a possible implementation, the determining the target disturbance signal parameters in the case where the transmission state of the first probe signal meets the condition of interference superposition of signals comprises: determining a first device model corresponding to the card reading device in the case where the transmission state of the first probe signal meets the condition of interference superposition of signals; obtaining configuration information of a disturbance signal, the configuration information comprising at least one second device model and disturbance signal parameters corresponding to each second device model; and determining the disturbance signal parameters corresponding to the first device model in the configuration information as the target disturbance signal parameters.

[0011] In a possible implementation, the target disturbance signal parameters comprise a target amplitude, a target phase, a target duration, and a target frequency; the target phase is opposite to the phase of the first probe signal, and the target frequency is the same as the frequency of the first probe signal.

[0012] In a possible implementation, an amplitude variation between an interference signal obtained by interference superposition of the disturbance signal and the first probe signal and the first probe signal is greater than a detection threshold of the card reading device for amplitude variation; and / or, a phase variation between the interference signal and the first probe signal is greater than a detection threshold of the card reading device for phase variation.

[0013] In a possible implementation, the method further comprises: in the case where no card reading request signal is received within a preset time period after the disturbance signal is transmitted, detecting a probe signal transmitted by a card reading device in a low-power card detection mode; the card reading request signal is a signal transmitted by the card reading device in a standard card detection mode; and in the case where a second probe signal is detected, transmitting an excitation signal after a transmission period of the second probe signal to cause the card reading device to exit the low-power card detection mode.

[0014] In a possible implementation, the method further comprises: determining whether second characteristic information is detected within a preset time period after the disturbance signal is transmitted; the second characteristic information is characteristic information of a card reading request signal transmitted by a card reading device in a standard card detection mode; and in the case where it is determined that the second characteristic information is not detected, it is determined that the card reading request signal is not received.

[0015] In a second aspect, one or more embodiments of the present specification provide a near field communication device, comprising: a signal processing module and a signal generation module; the signal processing module is configured to detect a probe signal transmitted by a card reading device in a low-power card detection mode; and the signal generation module is configured to generate and transmit a disturbance signal in a case where a transmission state of a first probe signal meets a condition of interference superposition, so that the disturbance signal interferes with the first probe signal to make the card reading device exit the low-power card detection mode.

[0016] In a possible implementation, the signal processing module comprises an analog-to-digital converter and a processor; the signal processing module is configured to detect a probe signal transmitted by a card reading device in a low-power card detection mode; specifically: the analog-to-digital converter is configured to convert a received electromagnetic field signal into a digital signal and output the digital signal to the processor; the processor is configured to determine whether first feature information is detected based on the digital signal; the first feature information is feature information of the probe signal transmitted by the card reading device in the low-power card detection mode; in a case where it is determined that the first feature information is detected, it is determined that the first probe signal is detected; the level of the first probe signal is monitored based on a rising edge jump event; in a case where the rising edge jump event is monitored, it is determined that the transmission state of the first probe signal meets the condition of interference superposition.

[0017] In a possible implementation, the processor is further configured to determine target disturbance signal parameters and control the signal generation module to generate a disturbance signal based on the target disturbance signal parameters in a case where the transmission state of the first probe signal meets the condition of interference superposition.

[0018] In a possible implementation, the processor is configured to determine target disturbance signal parameters in a case where the transmission state of the first probe signal meets the condition of interference superposition, specifically: the processor is configured to determine a first device model corresponding to the card reading device in a case where the transmission state of the first probe signal meets the condition of interference superposition; obtain configuration information of a disturbance signal, the configuration information comprising at least one second device model and disturbance signal parameters corresponding to each second device model; and determine the disturbance signal parameters corresponding to the first device model in the configuration information as the target disturbance signal parameters.

[0019] In a possible implementation, the signal processing module comprises a rising edge detection circuit; the signal processing module is configured to detect a probe signal transmitted by the card reading device in the low-power card detection mode; specifically, the rising edge detection circuit is configured to determine whether first characteristic information is detected; the first characteristic information is characteristic information of the probe signal transmitted by the card reading device in the low-power card detection mode; in a case where it is determined that the first characteristic information is detected, it is determined that the first probe signal is detected; a level of the first probe signal is monitored based on a rising edge jump event; in a case where the rising edge jump event is monitored, it is determined that a transmission state of the first probe signal meets a condition of interfering with the superimposed signal.

[0020] In a possible implementation, the signal processing module further comprises a controller; the controller is configured to determine a target disturbance signal parameter in a case where the transmission state of the first probe signal meets the condition of interfering with the superimposed signal, and control the signal generation module to generate the disturbance signal based on the target disturbance signal parameter.

[0021] In a possible implementation, the controller is configured to determine a target disturbance signal parameter in a case where the transmission state of the first probe signal meets the condition of interfering with the superimposed signal, specifically: the controller is configured to determine a first device model corresponding to the card reading device in a case where the transmission state of the first probe signal meets the condition of interfering with the superimposed signal; obtain configuration information of a disturbance signal, the configuration information comprising at least one second device model and a disturbance signal parameter corresponding to each second device model; and determine the disturbance signal parameter corresponding to the first device model in the configuration information as the target disturbance signal parameter.

[0022] In a possible implementation, the apparatus further comprises a signal transceiver module and a near field communication chip; the signal transceiver module is configured to transmit the disturbance signal, and the near field communication chip is configured to perform data transmission with the card reading device; the signal transceiver module comprises a first antenna and a second antenna; the near field communication chip is connected to the first antenna, the analog-digital converter and the signal generation module are respectively connected to the second antenna, and the processor is connected between the analog-digital converter and the signal generation module; or, the signal transceiver module comprises a first antenna; the near field communication chip, the analog-digital converter and the signal generation module are respectively connected to the first antenna, and the processor is connected between the analog-digital converter and the signal generation module.

[0023] In a possible implementation, the signal transceiver module is configured to transmit the disturbance signal, and the near field communication chip is configured to perform data transmission with the card reading device; the rising edge detection circuit, the signal generation module, and the near field communication chip are connected to the signal transceiver module respectively, and the controller is connected between the rising edge detection circuit and the signal generation module.

[0024] In a possible implementation, any one or more of the rising edge detection circuit, the controller, and the signal generation module are integrated into the near field communication chip; or the rising edge detection circuit, the controller, and the signal generation module are circuits independent of the near field communication chip respectively.

[0025] In a possible implementation, the target disturbance signal parameter includes a target amplitude, a target phase, a target duration, and a target frequency; the target phase is opposite to a phase of the first probe signal, and the target frequency is the same as a frequency of the first probe signal.

[0026] In a possible implementation, the signal processing module is further configured to, in a case where no card reading request signal is received within a preset time period after the disturbance signal is transmitted, detect a probe signal transmitted by the card reading device in a low-power card detection mode; the card reading request signal is a signal transmitted by the card reading device in a standard card detection mode; and the signal generation module is further configured to, in a case where the second probe signal is detected, generate and transmit an excitation signal after a transmission period of the second probe signal, so as to cause the card reading device to exit the low-power card detection mode.

[0027] In a third aspect, one or more embodiments of the present specification also provide a computer-readable storage medium, which stores computer program instructions. When the computer program instructions are executed, the near field communication method of the first aspect is implemented.

[0028] In summary, in order to improve the success rate of reading label information by a mobile phone, one or more embodiments of the present specification provide a near field communication method and device. In the method, the near field communication device can transmit a disturbance signal in a case where a first probe signal transmitted by a card reading device is detected, so that the disturbance signal can interfere and superimpose with the first probe signal in space, thereby causing a large signal change of the first probe signal, so that the card reading device can detect the existence of the near field communication device nearby, and the success rate of reading label information is improved. BRIEF DESCRIPTION OF DRAWINGS

[0029] In order to more clearly illustrate the technical solutions of one or more embodiments of the present specification, the drawings needed to be used in the embodiments will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of one or more embodiments of the present specification, and other drawings can be obtained by those skilled in the art without creative effort.

[0030] Fig. 1 is a schematic diagram of an application scenario provided by one or more embodiments of the present specification;

[0031] Fig. 2 is a schematic diagram of a near field communication method provided by one or more embodiments of the present specification;

[0032] Fig. 3 is a schematic diagram of a signal transmission process provided by one or more embodiments of the present specification;

[0033] Fig. 4 is a schematic diagram of another signal transmission process provided by one or more embodiments of the present specification;

[0034] Fig. 5 is a structural block diagram of a near field communication device provided by one or more embodiments of the present specification;

[0035] Fig. 6 is a structural block diagram of another near field communication device provided by one or more embodiments of the present specification;

[0036] Fig. 7 is a structural block diagram of another near field communication device provided by one or more embodiments of the present specification;

[0037] Fig. 8 is a structural block diagram of another near field communication device provided by one or more embodiments of the present specification. DETAILED DESCRIPTION

[0038] The one or more embodiments of the present specification will be further described in detail below with the drawings and embodiments. Through these descriptions, the features and advantages of the one or more embodiments of the present specification will become more apparent.

[0039] The word "exemplary" is used herein to mean "serving as an example, instance, or illustration." Any implementation described herein as "exemplary" is not necessarily to be construed as preferred or advantageous over other implementations. Unless specifically stated otherwise, the drawings are not drawn to scale and are shown for purposes of explanation only.

[0040] In addition, the technical features involved in the different embodiments of the one or more embodiments of the present specification described below can be combined with each other as long as there is no conflict.

[0041] In order to facilitate understanding, the application scenario of the technical solutions provided by the one or more embodiments of the present specification will be described first.

[0042] Near field communication (NFC) is a short-range wireless communication technology, which can realize non-contact data transmission between two devices in a short distance, and provides a safe and fast communication method.

[0043] NFC can include three working modes:

[0044] The first is a card reader mode, in which a terminal device such as a mobile phone supporting NFC function can be used as a card reader device to read information from media such as tags, stickers, postcards, newspapers, business cards, etc. with NFC chips, or write data to these media. In one or more embodiments of the present specification, these media can be referred to as NFC tags or NFC devices.

[0045] The second is a virtual card mode, in which a terminal device such as a mobile phone supporting NFC function can be used as a debit card, credit card, bus card, access card, etc. The basic principle is to encapsulate the information in the corresponding IC card into a data packet and store it in the terminal device such as a mobile phone supporting NFC function.

[0046] The third is a point-to-point mode, in which two terminal devices supporting NFC function can realize point-to-point transmission of data. For example, a mobile phone and a tablet computer supporting NFC function can realize point-to-point transmission of music, pictures, etc.

[0047] Among them, the first NFC working mode, i.e. the working mode of using a terminal device such as a mobile phone as a card reader device, can be applied to payment, ordering, information transmission, etc. Application scenarios, and the card reader device can be used to read the tag information of the NFC device. For example, in the payment scenario, the card reader device can read the payment information of the NFC device; in the ordering scenario, the card reader device can read the ordering information of the NFC device.

[0048] The following will be exemplarily described taking the application scenario of using a mobile phone as a card reader device for payment as an example.

[0049] As shown in (a) of FIG. 1, a payment scenario can include an NFC device 10 (also referred to as an NFC tag) and a mobile phone 20. The NFC device 10 can be a money collection device, a code plate, etc. When the mobile phone 20 is close to the NFC device 10 in a bright screen or unlocked state, the NFC device 10 can sense the mobile phone 20 of the user and communicate with the mobile phone 20 to deliver tag information (e.g., payment information). In this way, the mobile phone 20 can read the payment information. Then, as shown in (b) of FIG. 1, the mobile phone 20 can display a corresponding payment page according to the payment information. When the user performs a payment operation on the mobile phone 20 according to the payment page (e.g., the user clicks a payment control "Confirm Payment" displayed in the payment page, or inputs a corresponding payment amount and clicks a payment control "Confirm Payment" displayed in the payment page), the payment is completed. Then, as shown in (c) of FIG. 1, the mobile phone 20 of the user can display a payment completion page, thereby completing the payment of the user to the merchant. Compared with the code scanning payment mode, the above payment mode can shorten the payment path of the user and improve the payment experience of the user.

[0050] When the mobile phone is used as a card reading device, the power consumption of the mobile phone needs to be considered. In order to reduce the power consumption of the mobile phone and save power, the following method can be used to read the tag information of the NFC device: first, a low power card detection (LPCD) mode is used to detect whether there is an NFC device nearby; if it is detected that there is an NFC device nearby, the LPCD mode is exited, and a standard card detection mode is used to read the tag information of the NFC device. The power consumed by the LPCD mode is less than the power consumed by the standard card detection mode, so the power consumption of the mobile phone can be reduced by using the LPCD mode.

[0051] For example, the following method can be used to determine whether there is an NFC device nearby: the mobile phone transmits a probe signal in the LPCD mode, and if there is an NFC device nearby, the NFC device will cause the probe signal transmitted by the mobile phone to change. For example, the NFC device will consume part of the energy of the probe signal, so that the amplitude or phase of the probe signal becomes smaller. The mobile phone can detect whether the change amount of the probe signal exceeds a change amount detection threshold by using software or hardware. If it is detected that the change amount of the probe signal exceeds the change amount detection threshold, the mobile phone confirms that there is an NFC device nearby, and then exits the LPCD mode and switches to the standard card detection mode to read the information of the NFC device. If it is detected that the change amount of the probe signal does not exceed the change amount detection threshold, the mobile phone confirms that there is no NFC device nearby, and continues to transmit the probe signal in the LPCD mode.

[0052] Although the LPCD mode can reduce the power consumption of the mobile phone, the change amount of the probe signal caused by the NFC device is small, which can be insufficient to make the change amount of the probe signal exceed the detection threshold of the change amount, because the signal strength of the probe signal transmitted in the LPCD mode is weak. In this way, in the LPCD mode, the sensing distance of the mobile phone reading the information of the NFC device is significantly reduced, and the sensitivity is reduced. However, the change amount threshold corresponding to different models of mobile phones is different, or the detection sensitivity of the change amount of the probe signal of different models of mobile phones is different. Therefore, in the LPCD mode, the probability of the mobile phone detecting the change of the probe signal can be small, thereby resulting in a low success rate of the mobile phone reading the card, which seriously affects the user experience. For example, some mobile phones can need to transmit the probe signal multiple times before successfully reading the tag information. For another example, some mobile phones can also fail to successfully read the tag information after transmitting the probe signal multiple times.

[0053] To solve the problem of low success rate of reading the card in the LPCD mode when the mobile phone is used as a card reading device, one or more embodiments of the present specification provide a near field communication method and device. In the method, the NFC device can detect whether the probe signal is received. If the probe signal is detected, the NFC device can synchronously transmit a disturbance signal during the transmission of the probe signal by the mobile phone, so that the disturbance signal and the probe signal interfere and superimpose to make the mobile phone exit the LPCD mode, thereby improving the success rate of reading the card by the mobile phone.

[0054] The embodiments of the near field communication method provided by one or more embodiments of the present specification are exemplarily described below.

[0055] Referring to FIG. 2, FIG. 2 is a flowchart of a near field communication method provided by one or more embodiments of the present specification. The method can be applied to an application scenario in which a terminal device such as a mobile phone is used as a card reading device. As shown in FIG. 2, the method can include the following steps:

[0056] In step S102, the card reading device periodically transmits a probe signal in the LPCD mode.

[0057] The period of transmitting the probe signal, the duration of the probe signal, the amplitude of the probe signal, the phase, and the like of different card reading devices can be different, and one or more embodiments of the present specification do not limit this.

[0058] In step S104, the NFC device detects the probe signal transmitted by the card reading device.

[0059] It should be noted that the signal transmitted by the card reading device in the LPCD mode is referred to as a probe signal, and the signal transmitted by the card reading device in the standard card detection mode is referred to as a card reading request signal in one or more embodiments of the present specification. The probe signal is different from the card reading request signal, for example, the signal intensity, modulation mode, and information carried by the probe signal are different from those of the card reading request signal. In this way, the NFC device can determine whether the detected signal is a probe signal or a card reading request signal based on characteristic information such as signal intensity, modulation mode, and information carried.

[0060] For example, the received signal can be detected as a probe signal in the following manner: determining whether first characteristic information is detected; the first characteristic information is characteristic information of the probe signal transmitted by the card reading device in the LPCD mode, for example, signal intensity, modulation mode, and information carried. In a case where it is determined that the first characteristic information is detected, it is determined that the probe signal is detected.

[0061] Similarly, the received signal can be detected as a card reading request signal in the following manner: determining whether second characteristic information is detected; the second characteristic information is characteristic information of the card reading request signal transmitted by the card reading device in the standard card detection mode, for example, signal intensity, modulation mode, and information carried. In a case where it is determined that the second characteristic information is detected, it is determined that the card reading request signal is detected.

[0062] In a case where it is determined that the detected signal is a probe signal, it can be further determined whether the transmission state of the detected probe signal (hereinafter, a first probe signal is taken as an example, wherein the first probe signal can be the probe signal transmitted by the card reading device in the LPCD mode and detected by the NFC device earliest.) meets the condition of interfering and superimposing signals.

[0063] The transmission state of the first probe signal can include transmission end and transmission not ended. When the transmission state of the first probe signal is transmission end, the disturbance signal transmitted by the NFC device cannot interfere and superimpose with the first probe signal in space. When the transmission state of the first probe signal is transmission not ended, the disturbance signal transmitted by the NFC device can interfere and superimpose with the first probe signal in space. Therefore, in one or more embodiments of the present specification, the transmission state of the probe signal meeting the condition of interfering and superimposing signals can be set as the transmission state of the probe signal being transmission not ended. That is, the condition of interfering and superimposing signals can be met at any time before the transmission of the probe signal is not ended.

[0064] In this way, the disturbance signal can interfere and superimpose with any part of the first probe signal in space, thereby changing the amplitude and / or phase of the first probe signal. For example, the disturbance signal can be transmitted at the beginning, middle, or near the end of the transmission of the first probe signal.

[0065] The detection signal can be a pulse signal, and the pulse signal can be divided into a rising edge phase, a stable high level phase (also referred to as a flat top phase) and a falling edge phase according to the order of transmission time. Thus, in one or more embodiments of the present specification, it can be determined, based on the level or waveform of the first detection signal, that the detected first detection signal is in the rising edge phase, the stable high level phase or the falling edge phase, and further, the disturbance signal can be transmitted synchronously in the rising edge phase, the stable high level phase or the falling edge phase.

[0066] In a possible implementation, the determination that the transmission state of the first detection signal meets the condition of interference superposition signals can be implemented in the following manner: after it is determined that the first detection signal is detected, the rising edge jump event is monitored based on the level or waveform of the first detection signal; and in the case that the rising edge jump event is monitored, it is determined that the transmission state of the detected first detection signal meets the condition of interference superposition signals.

[0067] For example, the NFC device can detect whether the level of the first detection signal has a rising edge jump in a preset time window; if it is detected that the level of the first detection signal has a rising edge jump, the NFC device can determine that the rising edge jump event is detected.

[0068] For example, the preset time window can be 1 μs, if the level corresponding to a later time point is higher than the level corresponding to an earlier time point in 1 μs, and the difference between the two levels is greater than a level threshold, it can be determined that there is a rising edge jump in 1 μs, and further, it can be determined that the rising edge jump event is detected.

[0069] The first detection signal lasts for a period of time, for example, the first detection signal lasts for 35 μs. Thus, after it is determined that the rising edge jump event is detected, the NFC device can transmit the disturbance signal, so as to transmit the disturbance signal synchronously with the first detection signal as far as possible, to interfere and superimpose in space.

[0070] In a possible implementation, the determination that the transmission state of the first detection signal meets the condition of interference superposition signals can also be implemented in the following manner: after it is determined that the first detection signal is detected, it is determined, based on the level or waveform of the first detection signal, whether the flat top phase of the first detection signal is reached; and in the case that it is determined that the flat top phase of the first detection signal is reached, it is determined that the transmission state of the detected first detection signal meets the condition of interference superposition signals.

[0071] In order to make the card reading device detect the NFC tag as soon as possible, the NFC device can transmit the interference signal immediately after detecting the rising edge jump event, that is, the interference signal can be transmitted in the case of detecting the rising edge jump event. In this way, on the one hand, the first detection signal can be changed as soon as possible by the interference signal; on the other hand, the interference signal can also be superimposed with the first detection signal for a long enough time to improve the effect of the interference. Generally, after the card reading device transmits the first detection signal and before the second detection signal, the card reading device can successfully read the tag information of the NFC device, such as payment information.

[0072] In step S106, the NFC device transmits the interference signal in the case that the transmission state of the first detection signal meets the superimposed signal condition, so that the interference signal is superimposed with the first detection signal to make the card reading device exit the LPCD mode.

[0073] In the case that the transmission state of the first detection signal meets the superimposed signal condition, the NFC device transmits the interference signal, which can be implemented in the following manner: in the case that the transmission state of the first detection signal meets the superimposed signal condition, the NFC device can first determine the target interference signal parameter; then, the NFC device can generate the interference signal based on the target interference signal parameter; and then, the NFC device transmits the interference signal.

[0074] The target interference signal parameter can include a target amplitude, a target phase, a target duration, a target frequency, and the like used for generating the interference signal.

[0075] Optionally, in one or more embodiments of the present specification, the NFC device can configure the same target interference signal parameter for different card reading devices. The target interference signal parameter can be a good interference signal parameter determined in the research and development test phase.

[0076] Optionally, in one or more embodiments of the present specification, the NFC device can also configure different target interference signal parameters for different card reading devices. In this case, the NFC device can determine the target interference signal parameter in the following manner: in the case that the transmission state of the first detection signal meets the superimposed signal condition, the first device model corresponding to the card reading device is determined; the configuration information of the interference signal is obtained, the configuration information including at least one second device model and the interference signal parameters corresponding to each second device model; and the interference signal parameter corresponding to the first device model in the configuration information is determined as the target interference signal parameter.

[0077] That is, the NFC device can be pre-configured with different device models respectively corresponding to the amplitude, phase, duration and frequency of the perturbation signal parameters. Then, after determining the device model corresponding to the current card reading device, the target amplitude, target phase, target duration and target frequency of the target perturbation signal parameters corresponding to the current card reading device can be matched from the configuration information.

[0078] The NFC device can determine the device model corresponding to the current card reading device in the following manner: the NFC device can be pre-configured with different device models respectively corresponding to the signal characteristics of the probe signal, for example, the signal characteristics can include at least one of the amplitude, phase and duration of the probe signal. In this way, the NFC device can determine the device model corresponding to the current card reading device based on the received first probe signal; then, the NFC device can generate and transmit the perturbation signal based on the target perturbation signal parameters corresponding to the device model to which the current card reading device belongs.

[0079] In this way, the perturbation signal matched with different card reading devices can be generated respectively to better achieve the effect of perturbing the first probe signal.

[0080] The target duration can be the same as the duration of the first probe signal, and the target frequency can be the same as the frequency of the first probe signal. In this way, the perturbation signal can be transmitted synchronously during the duration of the first probe signal transmitted by the card reading device, achieving a better interference effect.

[0081] In one or more embodiments of the specification, the specific parameters of the target phase are not limited. For example, the target phase can be opposite to the phase of the first probe signal, or the phase angle between the target phase and the phase of the first probe signal can be greater than or equal to 0° and less than 180°.

[0082] In the case where the target phase is opposite to the phase of the first probe signal, the interference signal with opposite phase can make the amplitude of the first probe signal smaller after interfering with the first probe signal. In this way, the card reading device can also satisfy the exit LPCD mode condition, which further includes detecting that the amplitude of the first probe signal is smaller.

[0083] Step S108, the card reading device exits the low-power card detection mode when detecting that the change amount of the first probe signal is greater than the change amount threshold.

[0084] Since the disturbance signal and the first probe signal are superimposed in space interference, the first probe signal can produce a large change, therefore, most card reading devices can detect that the signal change of the interference signal relative to the first probe signal is greater than the change threshold. For example, the amplitude change between the interference signal and the first probe signal can be greater than the detection sensitivity of the card reading device to the amplitude change (or greater than the amplitude change threshold); and / or, the phase change between the interference signal and the probe signal is greater than the detection sensitivity of the card reading device to the phase change (or greater than the phase change threshold).

[0085] In this way, the card reading device can detect that the first probe signal has changed, and determine that there is an NFC device nearby based on the change of the first probe signal, so as to exit the LPCD mode.

[0086] Step S110, the card reading device transmits a card reading request signal in the standard card detection mode.

[0087] After the card reading device confirms that there is an NFC device nearby, the card reading device can exit the LPCD mode and transmit a card reading request signal in the standard card detection mode. The card reading request signal can carry request information to request reading information of the NFC device or request writing information to the NFC device, etc.

[0088] Step S112, after the NFC device senses the card reading request signal, the NFC device sends a response signal to the card reading device.

[0089] After the NFC device senses the card reading request signal, the NFC device can send a response signal to the card reading device. The response signal can carry response information corresponding to the request information. After the card reading device receives the response information, the card reading device can perform data transmission and other interactive operations with the NFC device.

[0090] For example, as shown in FIG. 3, in the LPCD mode, the card reading device can transmit a probe signal every certain period of time (i.e., periodically transmit the probe signal), and each probe signal can last for a certain period of time. In the first transmission period, after the card reading device starts to transmit the first probe signal, the NFC device can detect the transmission of the first probe signal by the card reading device, and when the transmission state of the first probe signal meets the condition of the interference superposition signal, the NFC device can transmit the interference signal. After the interference signal disturbs the first probe signal, the card reading device detects that the first probe signal has changed, and then the card reading device exits the LPCD mode and switches to the standard card detection mode to transmit a card reading request signal. As shown in FIG. 3, the card reading request signal can be transmitted before the second probe signal, so that the card reading device can successfully read the tag information of the NFC device after transmitting a probe signal.

[0091] In summary, one or more embodiments of the present specification can emit a disturbance signal by the NFC device to disturb the first probe signal, so that the signal change of the first probe signal is larger, thereby increasing the probability of the first probe signal being detected by the card reader of different models, and improving the success rate of reading the card by the card reader of different models.

[0092] Secondly, since the scheme provided by one or more embodiments of the present specification makes the signal change of the probe signal larger by emitting a disturbance signal on the NFC device side, and the logic of the card reader for judging whether there is an NFC device nearby has not changed, therefore, the card reader will not pop up a virtual card and other problems after detecting the interference signal.

[0093] Among them, the pop-up virtual card refers to the card reader that supports both the card reader mode and the virtual card mode, when it detects other signals emitted in the time period other than the probe signal, it may consider that there is other card reader nearby, and then may pop up the corresponding virtual card for other card readers to read information. It should be understood that the scheme provided in one or more embodiments of the present specification is to emit a disturbance signal to disturb the probe signal during the emission of the probe signal, and does not send an independent signal to the card reader in the time period other than the probe signal, therefore the card reader will not pop up a virtual card.

[0094] The inventor found that after emitting the disturbance signal, there may still be individual cases that cannot make the card reader successfully read the tag information of the NFC device. For example, for the card reader with low detection sensitivity of the change amount of the first probe signal, the success rate of reading the card is still low.

[0095] To solve the above problems, the following methods can be used to further improve the success rate of reading the card by the card reader:

[0096] In the case that the card reading request signal is not received within the preset time period after emitting the disturbance signal, the probe signal emitted by the card reader in the LPCD mode is detected again; in the case that the second probe signal is detected, the excitation signal is emitted after the cycle of the second probe signal to make the card reader exit the LPCD mode.

[0097] As shown in FIG. 4, in the first transmission period in the LPCD mode, after the card reading device starts to transmit the first probe signal, the NFC device can detect the rising edge event of the first probe signal and synchronously transmit the disturbance signal. However, the disturbance signal does not disturb the first probe signal, and the card reading device does not detect the change of the first probe signal. Therefore, within a preset time period after the transmission of the disturbance signal, the NFC device does not receive the card reading request signal. In this case, the NFC device can detect the probe signal, and in the case of detecting the second probe signal, the NFC device transmits the excitation signal after the second probe signal and the third probe signal.

[0098] As shown in FIG. 4, the excitation signal is transmitted in a staggered manner with the second probe signal and does not overlap, that is, the excitation signal does not affect the second probe signal that has been transmitted. After receiving the excitation signal, the card reading device can initially consider that the excitation signal is a signal transmitted by another card reading device to excite the current card reading device to read the tag information from the current card reading device. That is, in this case, the card reading device can consider that the excitation signal is used to indicate that there is another card reading device nearby, and the card reading device can be requested to be used as a virtual card. Based on this, the card reading device can further determine whether the excitation signal is used to indicate that there is another card reading device nearby or is used to indicate that there is an NFC device nearby. When the card reading device determines that the excitation signal is used to indicate that there is an NFC device nearby, the card reading device can exit the LPCD mode and transmit the card reading request signal. Since it takes a certain time for the card reading device to determine that the excitation signal is used to indicate that there is an NFC device nearby, as shown in FIG. 4, the card reading device can transmit the card reading request signal after transmitting the third probe signal.

[0099] It should be noted that one or more embodiments of the present specification do not limit the specific parameters of the excitation signal, for example, the excitation signal can be a section of the empty carrier signal. In this way, the card reading device can determine whether the excitation signal is used to indicate that there is another card reading device nearby or is used to indicate that there is an NFC device nearby based on whether the excitation signal is an empty carrier signal.

[0100] It should be further noted that the second probe signal can be any probe signal after the first probe signal, and one or more embodiments of the present specification do not limit this.

[0101] In this way, in the case that the disturbance signal does not successfully disturb the first probe signal, the card reading device can be further caused to exit the LPCD mode by the excitation signal, thereby improving the card reading success rate of the card reading device.

[0102] It can be understood that the above embodiments are only examples, and the above embodiments can be deformed in actual implementation. Those skilled in the art can understand that the deformed methods of the above embodiments without creative labor all fall within the protection scope of one or more embodiments of the present specification, and will not be described herein.

[0103] Based on the same inventive concept, one or more embodiments of the present specification also provide an NFC device. Since the principle of the problem solved by the NFC device is similar to the aforementioned NFC method, the implementation of the NFC device can refer to the implementation of the aforementioned NFC method, and the repeated parts will not be described herein.

[0104] Referring to FIG. 5, FIG. 5 is a structural block diagram of an NFC device provided by one or more embodiments of the present specification. As shown in FIG. 5, the NFC device 200 can include a signal processing module 201 and a signal generation module 202. Wherein,

[0105] The signal processing module 201 is configured to detect a probe signal transmitted by a card reading device in a low-power card detection mode.

[0106] The signal generation module 202 is configured to generate and transmit a disturbance signal in a case where a transmission state of a first probe signal meets a condition of interference superposition signal, so that the disturbance signal and the first probe signal interfere and superimpose to make the card reading device exit the low-power card detection mode. The first probe signal is a probe signal detected by the NFC device earliest among the probe signals transmitted by the card reading device in the low-power card detection mode.

[0107] In a possible implementation, the signal processing module 201 can also be configured to detect a probe signal transmitted by a card reading device in a low-power card detection mode in a case where a read card request signal is not received within a preset time period after the disturbance signal is transmitted. The read card request signal is a signal transmitted by the card reading device in a standard card detection mode. The signal generation module 202 can also be configured to generate and transmit an excitation signal after the second probe signal in a case where a second probe signal is detected, so as to make the card reading device exit the low-power card detection mode.

[0108] As shown in FIG. 5, the NFC device 200 can further include a signal transceiver module 203 and an NFC chip 204. Wherein the signal processing module 201, the signal generation module 202 and the NFC chip 204 can all be connected with the signal transceiver module 203, and the signal generation module 202 can be connected between the signal processing module 201 and the signal transceiver module 203. The signal generation module 202 can be configured to generate a disturbance signal and transmit the disturbance signal through the signal transceiver module 203. The NFC chip 204 can be configured to perform data transmission with a card reading device.

[0109] Wherein, the signal processing module 201 can be implemented in a combination of software and hardware or in a pure hardware manner, and one or more embodiments of the present specification do not limit this.

[0110] The signal processing module 201 provided by one or more embodiments of the present specification is implemented by combining software and hardware, and is exemplarily described below in combination with FIG. 6 and FIG. 7.

[0111] For example, as shown in FIG. 6, the signal processing module 201 can include an analog-to-digital converter (ADC) 2011 and a processor 2012. The signal transceiver module 203 can be connected to the ADC 2011 and the signal generation module 202 respectively, and the processor 2012 can be connected between the ADC 2011 and the signal generation module 202.

[0112] The ADC 2011 can be configured to convert the electromagnetic field signal received by the signal transceiver module 203 into a digital signal and output the digital signal to the processor.

[0113] The processor 2012 can be configured to determine whether the first characteristic information is detected based on the digital signal, the first characteristic information being characteristic information of a probe signal emitted by the card reading device in a low-power card detection mode, and determine that the first probe signal is detected in a case where it is determined that the first characteristic information is detected, monitor a rising edge jump event based on a level of the first probe signal, and determine that a transmission state of the first probe signal meets a condition of an interference superposition signal in a case where the rising edge jump event is monitored.

[0114] The processor 2012 can be any device with signal processing capability. For example, the processor can be a micro controller unit (MCU). After receiving the digital signal, the processor can process the digital signal through software.

[0115] In a possible implementation, the processor 2012 can be further configured to determine a target perturbation signal parameter and control the signal generation module to generate a perturbation signal based on the target perturbation signal parameter in a case where the transmission state of the first probe signal meets the condition of the interference superposition signal.

[0116] In a possible implementation, the processor 2012 can be configured to determine a first device model corresponding to the card reading device in a case where the transmission state of the first probe signal meets the condition of the interference superposition signal, obtain configuration information of the perturbation signal, the configuration information including at least one second device model and a perturbation signal parameter corresponding to each second device model, and determine the perturbation signal parameter corresponding to the first device model in the configuration information as the target perturbation signal parameter.

[0117] In a possible implementation, the target perturbation signal parameter can include a target amplitude, a target phase, a target duration, and a target frequency; the target phase is opposite to a phase of the first detection signal, and the target frequency is the same as a frequency of the first detection signal.

[0118] The signal generation module 202 can be a hardware structure for generating a perturbation signal. For example, the signal generation module 202 can be an active crystal oscillator or an RC oscillation circuit, and the embodiments of the present specification are not limited in this regard. Specifically, the signal generation module 202 can generate a perturbation signal based on the target perturbation signal parameter in the control command after receiving the control command issued by the processor 2012.

[0119] Please continue to refer to FIG. 6. The signal transceiver module 203 can include a first antenna 2031, where the ADC 2011, the signal generation module 202, and the NFC chip 204 can all be connected to the first antenna 2031. In this case, the first antenna 2031 can be time-multiplexed. For example, before receiving a card reading request signal, the first antenna 2031 can be used for signal transceiving by the ADC 2011 and the signal generation module 202. After receiving the card reading request signal, the first antenna 2031 can be used for signal transceiving by the NFC chip 204.

[0120] As shown in FIG. 7, the signal transceiver module 203 can also include the first antenna 2031 and a second antenna 2032. The NFC chip 204 can be connected to the first antenna 2031, and the ADC 2011 and the signal generation module 202 can both be connected to the second antenna 2032.

[0121] The signal processing module 201 implemented in a pure hardware manner provided by one or more embodiments of the present specification will be described below with reference to FIG. 8.

[0122] As shown in FIG. 8, the signal processing module 201 can include a rising edge detection circuit 2013 and a controller 2014. The rising edge detection circuit 2013 and the signal generation module 202 can be connected to the signal transceiver module 203, respectively, and the controller 2014 can be connected between the rising edge detection circuit 2013 and the signal generation module 202.

[0123] In a possible implementation, any one or several of the rising edge detection circuit 2013, the controller 2014, and the signal generation module 202 can be integrated into the NFC chip 204; or,

[0124] The rising edge detection circuit 2013, the controller 2014, and the signal generation module 202 can be respectively independent of the NFC chip 204

[0125] The rising edge detection circuit 2013 can be configured to determine whether the first feature information is detected, the first feature information being feature information of a probe signal transmitted by the card reading device in the low-power card detection mode, and determine that the first probe signal is detected when it is determined that the first feature information is detected, monitor a rising edge jump event based on a level of the first probe signal, and determine that a transmission state of the first probe signal meets a condition of interfering with the superimposed signal when the rising edge jump event is monitored.

[0126] The controller 2014 can be configured to determine a target disturbance signal parameter when it is determined that the transmission state of the first probe signal meets the condition of interfering with the superimposed signal, and control the signal generation module to generate the disturbance signal based on the target disturbance signal parameter.

[0127] In a possible implementation, the controller 2014 can be configured to determine a first device model corresponding to the card reading device when it is determined that the transmission state of the first probe signal meets the condition of interfering with the superimposed signal, obtain configuration information of the disturbance signal, the configuration information including at least one second device model and a disturbance signal parameter corresponding to each second device model, and determine the disturbance signal parameter corresponding to the first device model in the configuration information as the target disturbance signal parameter.

[0128] In a possible implementation, the controller 2014 can be configured to configure the same target disturbance signal parameter for different card reading devices. In this way, the complexity of circuit design of the controller 2014 can be reduced.

[0129] It should be noted that the functions of the components in the NFC device 200 described above are the same as the implementation principles of the corresponding steps in the near field communication method, and details can be referred to the descriptions of the corresponding parts in the method embodiments described above, which are not repeated here.

[0130] It should be noted that the components shown in FIGS. 5 to 8 are exemplary, and other types of structures can be used to supplement or replace the structures to implement telecommunication functions or other functions. In addition, the NFC device 200 can further include components not shown in FIGS. 5 to 8, which can be referred to the prior art.

[0131] In some optional implementations, the NFC device 200 can further include a memory, a communication module, an input unit, an audio processor, a display, a power supply, and the like.

[0132] The memory can be coupled to the signal processing module 201 and can be one or more of a buffer, flash memory, hard drive, removable media, volatile memory, non-volatile memory, or other suitable device. Programs related to the above-described information regarding the near field communication method execution can be stored. The signal processing module 201 can execute the programs stored in the memory to achieve information storage or processing, etc.

[0133] The memory can be a solid state memory such as a read only memory (ROM), a random access memory (RAM), a SIM card, etc. It can also be a memory that saves information even when power is off, can be selectively erased, and is provided with more data, examples of which are sometimes referred to as an EPROM, etc. The memory can also be some other type of device. The memory includes a buffer memory (sometimes referred to as a buffer). The memory can include an application / function storage section for storing application programs and function programs or for storing a flow for executing the operation of the NFC device 200 by the signal processing module 201.

[0134] The memory can also include a data storage section for storing data such as contacts, digital data, pictures, sounds, and / or any other data used by the payment device. A driver storage section of the memory can include various drivers of the computer device for a communication function and / or for executing other functions of the computer device such as a messaging application, an address book application, etc.

[0135] The input unit can provide input to the signal processing module 201. The input unit is, for example, a key or a touch input device. The power supply can be used to provide power to the NFC device 200. The display can be used to display display objects such as images and text. The display can be, for example, an LCD display, but is not limited thereto.

[0136] The communication module is a transmitter / receiver that transmits and receives signals via an antenna. The communication module (transmitter / receiver) is coupled to the signal processing module 201 to provide input signals and receive output signals, which can be the same as in the case of a conventional mobile communication terminal.

[0137] Based on different communication technologies, multiple communication modules, such as a cellular network module, a Bluetooth module, and / or a wireless local area network module, etc., can be provided in the same computer device. The communication modules (transmitters / receivers) are also coupled to a speaker and a microphone via an audio processor to provide audio output via the speaker and to receive audio input from the microphone to implement the usual telecommunication functions. The audio processor can include any suitable buffers, decoders, amplifiers, etc. In addition, the audio processor is also coupled to the signal processing module 201 to enable recording on the local device via the microphone and to enable playing of stored sounds on the local device via the speaker.

[0138] The one or more embodiments of the present specification also provide a computer readable storage medium capable of implementing all the steps of the near field communication method in the above-mentioned embodiments, and the computer readable storage medium stores a computer program, which, when executed by a processor, implements all the steps of the near field communication method in the above-mentioned embodiments.

[0139] Although the one or more embodiments of the present specification provide method operation steps as embodiments or flowcharts, more or fewer operation steps can be included based on conventional or non-inventive labor. The order of steps listed in the embodiments is only one of the many execution orders of the steps, and does not represent the only execution order. When the device or client product in the actual execution, the method order shown in the embodiments or the drawings can be executed in sequence or in parallel (for example, in the environment of parallel processor or multi-thread processing).

[0140] Those skilled in the art should understand that the embodiments of the present specification can be provided as a method, device or computer program product. Therefore, the embodiments of the present specification can take the form of a complete hardware embodiment, a complete software embodiment or an embodiment combining software and hardware aspects. Moreover, one or more embodiments of the present specification can take the form of a computer program product implemented on one or more computer-usable storage media (including, but not limited to, magnetic disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0141] This specification describes one or more embodiments of a method, apparatus (system), and computer program product according to one or more embodiments of this specification with reference to flowchart illustrations and / or block diagrams. It will be understood that each block of the flowchart illustrations and / or block diagrams, and combinations of blocks in the flowchart illustrations and / or block diagrams, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, special-purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart illustrations and / or block diagrams.

[0142] These computer program instructions may also be stored in a computer-readable storage medium that can direct a computer or other programmable data processing device to function in a particular manner, such that the instructions stored in the computer-readable storage medium produce an article of manufacture including instruction means that implement the functions specified in one or more flowcharts and / or one or more block diagrams.

[0143] These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer-implemented process, such that the instructions, which execute on the computer or other programmable apparatus, provide steps for implementing the functions specified in one or more flowcharts and / or one or more block diagrams.

[0144] The various embodiments in this specification are described in a progressive manner. Similar or identical parts between embodiments can be referred to mutually. Each embodiment focuses on describing the differences from other embodiments. In particular, the device and system embodiments are basically similar to the method embodiments, so the descriptions are relatively simple; relevant parts can be referred to the descriptions of the method embodiments.

[0145] In this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, without necessarily requiring or implying any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Those skilled in the art will understand the specific meaning of the above terms in one or more embodiments of this specification, depending on the specific circumstances.

[0146] It should be noted that the features of one or more embodiments and embodiments described in the specification above can be combined with each other and / or replaced by other features in order to provide one or more other embodiments and embodiments.

[0147] Finally, it should be noted that the above-described embodiments are merely intended to illustrate the technical solutions of the one or more embodiments of the specification, rather than limit them. Although the one or more embodiments of the specification are described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that the technical solutions recorded in the foregoing embodiments can still be modified, or some or all of the technical features can be replaced by equivalents. Such modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the one or more embodiments of the specification, and should be included in the scope of the one or more embodiments of the specification.

[0148] The one or more embodiments of the specification are described above in combination with optional embodiments, but these embodiments are only exemplary and serve only to illustrate. On this basis, various substitutions and improvements can be made to the one or more embodiments of the specification, and these all fall within the protection scope of the one or more embodiments of the specification.

Claims

1. A method of near field communication, characterized in that, The method is applied to a near field communication device, and comprises: detecting a probe signal transmitted by a card reading device in a low-power card detection mode; in a case where a transmission state of the first probe signal meets a condition of interference superposition, transmitting a disturbance signal so that the disturbance signal and the first probe signal interfere and superimpose to make the card reading device exit the low-power card detection mode.

2. The method of claim 1, wherein, The detecting a probe signal transmitted by a card reading device in a low-power card detection mode comprises: determining whether first feature information is detected; the first feature information is feature information of the probe signal transmitted by the card reading device in the low-power card detection mode; in a case where it is determined that the first feature information is detected, determining that the first probe signal is detected; monitoring a rising edge jump event based on a level of the first probe signal; in a case where the rising edge jump event is monitored, determining that the transmission state of the first probe signal meets the condition of interference superposition.

3. The method of claim 1 or 2, wherein, The in a case where a transmission state of the first probe signal meets a condition of interference superposition, transmitting a disturbance signal comprises: in a case where the transmission state of the first probe signal meets the condition of interference superposition, determining a target disturbance signal parameter; generating a disturbance signal based on the target disturbance signal parameter; transmitting the disturbance signal.

4. The method of claim 3, wherein, The in a case where a transmission state of the first probe signal meets a condition of interference superposition, determining a target disturbance signal parameter comprises: in a case where the transmission state of the first probe signal meets the condition of interference superposition, determining a first device model corresponding to the card reading device; obtaining configuration information of a disturbance signal, the configuration information comprising at least one second device model and a disturbance signal parameter corresponding to each second device model; determining the disturbance signal parameter corresponding to the first device model in the configuration information as the target disturbance signal parameter.

5. The method of claim 3, wherein, The target disturbance signal parameter comprises a target amplitude, a target phase, a target duration and a target frequency; the target phase is opposite to a phase of the first probe signal, and the target frequency is the same as a frequency of the first probe signal.

6. The method of claim 1, wherein, An amplitude change amount between an interference signal obtained by interference and superposition of the disturbance signal and the first probe signal and the first probe signal is greater than a detection threshold of the card reading device for the amplitude change amount; and / or, a phase change amount between the interference signal and the first probe signal is greater than a detection threshold of the card reading device for the phase change amount.

7. The method of claim 1, wherein, The method further comprises: in a case where no card reading request signal is received within a preset time period after the disturbance signal is transmitted, detecting a probe signal transmitted by a card reading device in a low-power card detection mode; the card reading request signal is a signal transmitted by the card reading device in a standard card detection mode; in a case where a second probe signal is detected, transmitting an excitation signal after a transmission period of the second probe signal to make the card reading device exit the low-power card detection mode.

8. The method of claim 7, wherein, The method further comprises: determine whether second characteristic information is detected within a preset time period after the disturbance signal is transmitted; the second characteristic information is characteristic information of a card reading request signal transmitted by the card reading device in a standard card detection mode; determine that the card reading request signal is not received in a case where it is determined that the second characteristic information is not detected.

9. A near field communication device, characterized in that comprise: a signal processing module and a signal generation module; the signal processing module is configured to detect a probe signal transmitted by the card reading device in a low-power card detection mode; the signal generation module is configured to generate and transmit a disturbance signal in a case where a transmission state of the first probe signal meets a condition of interference superposition, so that the disturbance signal interferes with and superimposes on the first probe signal to make the card reading device exit the low-power card detection mode.

10. The near field communication device of claim 9, wherein, the signal processing module comprises an analog-to-digital converter and a processor; the signal processing module is configured to detect a probe signal transmitted by the card reading device in a low-power card detection mode; specifically, the analog-to-digital converter is configured to convert a received electromagnetic field signal into a digital signal and output the digital signal to the processor; the processor is configured to determine whether first characteristic information is detected based on the digital signal; the first characteristic information is characteristic information of the probe signal transmitted by the card reading device in the low-power card detection mode; determine that the first probe signal is detected in a case where it is determined that the first characteristic information is detected; monitor a rising edge jump event based on a level of the first probe signal; determine that the transmission state of the first probe signal meets the condition of interference superposition in a case where the rising edge jump event is monitored.

11. The near field communication device of claim 10, wherein, the processor is further configured to determine target disturbance signal parameters and control the signal generation module to generate a disturbance signal based on the target disturbance signal parameters in a case where the transmission state of the first probe signal meets the condition of interference superposition.

12. The near field communication device of claim 11, wherein, the processor is configured to determine target disturbance signal parameters in a case where the transmission state of the first probe signal meets the condition of interference superposition, specifically, the processor is configured to determine a first device model corresponding to the card reading device in a case where the transmission state of the first probe signal meets the condition of interference superposition, obtain configuration information of a disturbance signal, the configuration information comprising at least one second device model and disturbance signal parameters corresponding to each second device model, and determine disturbance signal parameters corresponding to the first device model in the configuration information as the target disturbance signal parameters.

13. The near field communication device of claim 9, wherein, the signal processing module comprises a rising edge detection circuit; the signal processing module is configured to detect a probe signal transmitted by the card reading device in a low-power card detection mode; specifically, the rising edge detection circuit is configured to determine whether first characteristic information is detected; the first characteristic information is characteristic information of the probe signal transmitted by the card reading device in the low-power card detection mode; determine that the first probe signal is detected in a case where it is determined that the first characteristic information is detected; monitor a rising edge jump event based on a level of the first probe signal; ​ In a case where a rising edge jump event is monitored, it is determined that the transmission state of the first probe signal meets the condition of interference superposition signals.

14. The near field communication device of claim 13, wherein, The signal processing module further comprises a controller. The controller is configured to determine target perturbation signal parameters in a case where the transmission state of the first probe signal meets the condition of interference superposition signals, and control the signal generation module to generate a perturbation signal based on the target perturbation signal parameters.

15. The near field communication device of claim 14, wherein, The controller is configured to determine target perturbation signal parameters in a case where the transmission state of the first probe signal meets the condition of interference superposition signals, and specifically: The controller is configured to determine a first device model corresponding to the card reading device in a case where the transmission state of the first probe signal meets the condition of interference superposition signals, obtain configuration information of a perturbation signal, the configuration information comprising at least one second device model and perturbation signal parameters corresponding to each second device model, and determine the perturbation signal parameters corresponding to the first device model in the configuration information as target perturbation signal parameters.

16. The near field communication device of claim 10, wherein, The signal transceiver module is configured to transmit the perturbation signal, and the near field communication chip is configured to perform data transmission with the card reading device. The signal transceiver module comprises a first antenna and a second antenna; the near field communication chip is connected to the first antenna, the analog-digital converter and the signal generation module are respectively connected to the second antenna, and the processor is connected between the analog-digital converter and the signal generation module. Alternatively, The signal transceiver module comprises a first antenna; the near field communication chip, the analog-digital converter and the signal generation module are respectively connected to the first antenna, and the processor is connected between the analog-digital converter and the signal generation module.

17. The near field communication device of claim 14, wherein, The signal transceiver module is configured to transmit the perturbation signal, and the near field communication chip is configured to perform data transmission with the card reading device. The rising edge detection circuit, the signal generation module and the near field communication chip are respectively connected to the signal transceiver module, and the controller is connected between the rising edge detection circuit and the signal generation module.

18. The near field communication device of claim 17, wherein, The rising edge detection circuit, the controller and the signal generation module are integrated in the near field communication chip; or The rising edge detection circuit, the controller and the signal generation module are respectively independent of the near field communication chip.

19. The near field communication device of claim 11 or 14, wherein, The target perturbation signal parameters comprise a target amplitude, a target phase, a target duration and a target frequency; the target phase is opposite to the phase of the first probe signal, and the target frequency is the same as the frequency of the first probe signal.

20. The near field communication device of claim 9, wherein, The signal processing module is further configured to detect a probe signal transmitted by a card reading device in a low-power card detection mode in a case where a card reading request signal is not received within a preset time period after the perturbation signal is transmitted; the card reading request signal is a signal transmitted by the card reading device in a standard card detection mode. The signal generation module is further configured to, in a case where the second detection signal is detected, generate and transmit an excitation signal after a transmission period of the second detection signal, so as to cause the card reading device to exit the low-power card detection mode.

21. A computer-readable storage medium, characterized in that, The computer readable storage medium has stored computer program instructions which, when executed, implement the method of any one of claims 1-8.

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