Near-field wireless communication method, near-field wireless communication device, computer-readable storage medium, and computer program

Abstract

One or more embodiments herein provide a short-range wireless communication method and device. [Solution] The short-range wireless communication device can detect a sounding signal emitted by a card reading device in low-power card detection mode, and when it detects that the transmission state of a first sounding signal satisfies the conditions for an interference superimposed signal, it can emit a jamming signal, cause the jamming signal and the first sounding signal to interfere and superimpose, and then terminate the card reading device from the low-power card detection mode.

Description

[Technical Field]

[0001] TECHNICAL FIELD One or more embodiments of the present specification relate to the field of short-range wireless communication, and more particularly to a short-range wireless communication method and device. [Background technology]

[0002] Near field communication (NFC) is a short-range wireless communication technology that can realize contactless data transmission between two devices within a short distance, providing a secure and fast communication method for electronic devices.

[0003] In NFC applications where a terminal device such as a mobile phone acts as a card reader, tag information on an NFC tag can be read by the mobile phone. However, if the mobile phone needs to repeatedly try to read the tag information successfully, it will seriously affect the user experience. Therefore, it is necessary to provide a solution to improve the success rate of tag reading by the mobile phone. Summary of the Invention [Problem to be solved by the invention]

[0004] To improve the success rate of a mobile phone reading tag information, one or more embodiments herein provide a short-range wireless communication method and device. [Means for solving the problem]

[0005] According to a first aspect, one or more embodiments of the present specification provide a near-field wireless communication method for use in a near-field wireless communication device, the method including: detecting a sounding signal emitted by a card reading device in a low-power card detection mode; and, when detecting that the transmission state of a first sounding signal satisfies the condition of an interference superimposed signal, emitting a jamming signal, causing the jamming signal and the first sounding signal to be interfered with and superimposed, and then causing the card reading device to exit the low-power card detection mode, wherein the first sounding signal is the sounding signal detected earliest by the near-field wireless communication device among the sounding signals emitted by the card reading device in the low-power card detection mode.

[0006] In one possible implementation, detecting the sounding signal emitted by the card reading device in the low-power card detection mode includes determining whether first characteristic information is detected, where the first characteristic information is characteristic information of the sounding signal emitted by the card reading device in the low-power card detection mode; determining that the first sounding signal has been detected if it is determined that the first characteristic information has been detected; monitoring a rising edge transition event based on the level of the first sounding signal; and determining that the transmission state of the first sounding signal meets the condition of an interference superimposed signal if it is determined that a rising edge transition event has been detected.

[0007] In one possible implementation, when it is detected that the transmission state of the first sounding signal satisfies the condition of an interference superimposed signal, launching a jamming signal includes: when it is detected that the transmission state of the first sounding signal satisfies the condition of an interference superimposed signal, determining target jamming signal parameters, generating a jamming signal based on the target jamming signal parameters, and launching the jamming signal.

[0008] In one possible implementation method, when it is detected that the transmission state of the first sounding signal satisfies the conditions of an interference superimposed signal, determining a target interference signal parameter includes: when it is detected that the transmission state of the first sounding signal satisfies the conditions of an interference superimposed signal, determining a first device model number corresponding to the card reading device; obtaining configuration information for the interference signal, wherein the configuration information includes at least one second device model number and interference signal parameters corresponding to each of the second device model numbers; and determining the interference signal parameter corresponding to the first device model number in the configuration information as the target interference signal parameter.

[0009] In one possible implementation, the target interference signal parameters include a target amplitude, a target phase, a target duration, and a target frequency, where the target phase is opposite to the phase of the first sounding signal and the target frequency is the same as the frequency of the first sounding signal.

[0010] In one possible implementation, the amplitude change between the interference signal and the first sounding signal after the interference signal and the first sounding signal are interference-superimposed is greater than the detection threshold of the amplitude change by the card reading device, and / or the phase change between the interference signal and the first sounding signal is greater than the detection threshold of the phase change by the card reading device.

[0011] In one possible implementation, the method further includes: detecting a sounding signal emitted by the card reading device in a low-power card detection mode when a card read request signal is not received within a preset time length after emitting the interference signal, where the card read request signal is a signal emitted by the card reading device in a standard card detection mode; and emitting an excitation signal after the second sounding signal emission period when a second sounding signal is detected, to cause the card reading device to exit the low-power card detection mode.

[0012] In one possible implementation, the method further includes determining whether second characteristic information is detected within a preset time length after emitting the jamming signal, the second characteristic information being characteristic information of a card read request signal emitted by the card reading device in standard card detection mode, and determining that the card read request signal was not received if it is determined that the second characteristic information was not detected.

[0013] According to a second aspect, one or more embodiments of the present specification provide a near-field communication device, the device including: a signal processing module and a signal generating module; the signal processing module is used to detect a sounding signal emitted by a card reading device in a low-power card detection mode; the signal generating module is used to generate and emit a jamming signal when it detects that the transmission state of a first sounding signal satisfies the condition of an interference superimposed signal, and then cause the jamming signal and the first sounding signal to interfere with each other and then exit the card reading device from the low-power card detection mode; the first sounding signal is the sounding signal detected earliest by the near-field communication device among the sounding signals emitted by the card reading device in the low-power card detection mode.

[0014] In one possible implementation, the signal processing module includes an analog-to-digital converter and a processor, and the signal processing module is used to detect a sounding signal emitted by a card reading device in a low-power card detection mode. Specifically, the analog-to-digital converter is used to convert a received electromagnetic field signal into a digital signal and output the digital signal to the processor. The processor is used to determine whether first characteristic information is detected based on the digital signal, where the first characteristic information is characteristic information of a sounding signal emitted by the card reading device in a low-power card detection mode. If it is determined that the first characteristic information is detected, determine that a first sounding signal has been detected. Monitor a rising edge transition event based on the level of the first sounding signal. If it is determined that a rising edge transition event is detected, determine that it has been detected that the transmission state of the first sounding signal satisfies the condition of an interference superimposed signal.

[0015] In one possible implementation, the processor is further used to determine target jamming signal parameters and control the signal generation module to generate a jamming signal based on the target jamming signal parameters when it detects that the transmission state of the first sounding signal satisfies the conditions of an interference superimposed signal.

[0016] In one possible implementation method, the processor is used to determine target jamming signal parameters when it detects that the transmission state of the first sounding signal satisfies the conditions of an interference superimposed signal. Specifically, when it detects that the transmission state of the first sounding signal satisfies the conditions of an interference superimposed signal, the processor is used to determine a first device model number corresponding to the card reading device, obtain jamming signal configuration information, where the configuration information includes at least one second device model number and jamming signal parameters corresponding to each of the second device model numbers, and determine the jamming signal parameters corresponding to the first device model number in the configuration information as target jamming signal parameters.

[0017] In one possible implementation, the signal processing module includes a rising edge detection circuit, which is used to detect a sounding signal emitted by the card reading device in low-power card detection mode. Specifically, the rising edge detection circuit is used to determine whether first characteristic information is detected, where the first characteristic information is characteristic information of the sounding signal emitted by the card reading device in low-power card detection mode; determine that a first sounding signal has been detected if it is determined that the first characteristic information has been detected; monitor a rising edge transition event based on the level of the first sounding signal; and determine that the transmission state of the first sounding signal meets the condition of an interference superimposed signal if it is monitored.

[0018] In one possible implementation, the signal processing module further includes a controller, which is used to determine target interference signal parameters and control the signal generation module to generate an interference signal based on the target interference signal parameters when it detects that the transmission state of the first sounding signal satisfies the conditions of an interference superimposed signal.

[0019] In one possible implementation method, the controller is used to determine target jamming signal parameters when it detects that the transmission state of the first sounding signal satisfies the conditions of an interference superimposed signal. Specifically, when it detects that the transmission state of the first sounding signal satisfies the conditions of an interference superimposed signal, the controller is used to determine a first device model number corresponding to the card reading device, obtain jamming signal setting information, where the setting information includes at least one second device model number and jamming signal parameters corresponding to each of the second device model numbers, and determine the jamming signal parameters corresponding to the first device model number in the setting information as target jamming signal parameters.

[0020] In one possible implementation, the device further includes a signal transceiving module and a short-range wireless communication chip, wherein the signal transceiving module is used to emit the jamming signal, and the short-range wireless communication chip is used to transmit data with the card reading device, the signal transceiving module includes a first antenna and a second antenna, the short-range wireless communication chip is connected to the first antenna, the analog-to-digital converter and the signal generating module are respectively connected to the second antenna, and the processor is connected between the analog-to-digital converter and the signal generating module; or the signal transceiving module includes a first antenna, the short-range wireless communication chip, the analog-to-digital converter and the signal generating module are respectively connected to the first antenna, and the processor is connected between the analog-to-digital converter and the signal generating module.

[0021] In one possible implementation, the device further includes a signal transceiving module and a short-range wireless communication chip, wherein the signal transceiving module is used to emit the jamming signal, and the short-range wireless communication chip is used to transmit data with the card reading device, the rising edge detection circuit, the signal generating module and the short-range wireless communication chip are respectively connected to the signal transceiving module, and the controller is connected between the rising edge detection circuit and the signal generating module.

[0022] In one possible implementation, one or more of the rising edge detection circuit, the controller, and the signal generation module are integrated into the short-range wireless communication chip, or the rising edge detection circuit, the controller, and the signal generation module are each independent circuits from the short-range wireless communication chip.

[0023] In one possible implementation, the target interference signal parameters include a target amplitude, a target phase, a target duration, and a target frequency, where the target phase is opposite to the phase of the first sounding signal and the target frequency is the same as the frequency of the first sounding signal.

[0024] In one possible implementation, the signal processing module is further used to detect a sounding signal emitted by the card reading device in a low-power card detection mode when a card read request signal is not received within a preset time length after emitting the interference signal, where the card read request signal is a signal emitted by the card reading device in a standard card detection mode, and the signal generation module is further used to generate and emit an excitation signal after the second sounding signal emission period when the second sounding signal is detected, so as to exit the card reading device from the low-power card detection mode.

[0025] According to a third aspect, one or more embodiments of the present specification further provide a computer-readable storage medium having stored thereon computer program instructions that, when executed, realize the short-range wireless communication method of the first aspect. [Effects of the Invention]

[0026] Therefore, in order to improve the success rate of a mobile phone reading tag information, one or more embodiments of this specification provide a short-range wireless communication method and device, in which, when the short-range wireless communication device detects the emission of a first sounding signal from a card reading device, the short-range wireless communication device can emit a jamming signal to cause the jamming signal and the first sounding signal to be spatially interfered and superimposed, thereby causing a relatively large signal change in the first sounding signal, allowing the card reading device to detect the presence of a short-range wireless communication device nearby and improving the success rate of reading tag information.

[0027] In order to more clearly explain the technical solutions of one or more embodiments of this specification, the following briefly introduces drawings that need to be used in the description of the embodiments. It is obvious that the drawings in the following description are only some embodiments of one or more embodiments of this specification, and those skilled in the art can also obtain other drawings based on these drawings without exerting any creative efforts. [Brief explanation of the drawings]

[0028] [Figure 1] 1 is a schematic diagram of an application scenario according to one or more embodiments of the present disclosure. [Figure 2] 1 is a flowchart of a near field communication method according to one or more embodiments of the present disclosure. [Figure 3] FIG. 1 is a schematic diagram of a signal launch process according to one or more embodiments herein. [Figure 4] FIG. 10 is a schematic diagram of yet another signal launch process in accordance with one or more embodiments herein. [Figure 5] 1 is a structural block diagram of a near field communication device according to one or more embodiments of the present disclosure; [Figure 6] 1 is a structural block diagram of yet another near field communication device in accordance with one or more embodiments herein. [Figure 7] 1 is a structural block diagram of yet another near field communication device in accordance with one or more embodiments herein. [Figure 8] 1 is an architectural block diagram of a further near field communication device according to one or more embodiments herein. DETAILED DESCRIPTION OF THE INVENTION

[0029] One or more embodiments of the present specification will be described in more detail below with reference to the drawings and embodiments, which will make the features and advantages of one or more embodiments of the present specification more apparent.

[0030] The word "exemplary" as used herein means "serving as an example, embodiment, or illustration." Any embodiment described herein as "exemplary" should not necessarily be construed as superior or better than other embodiments. While various aspects of the embodiments are illustrated in the drawings, the drawings are not necessarily drawn to scale unless specifically noted.

[0031] In addition, the technical features of one or more different embodiments of the present specification described below may be combined with each other as long as they do not conflict with each other.

[0032] For ease of understanding, the following description first describes application scenarios of the technical solutions according to one or more embodiments of this specification.

[0033] Near field communication (NFC) is a short-range wireless communication technology that can realize contactless data transmission between two devices within a short distance, providing a secure and fast communication method.

[0034] NFC may include three modes of operation. The first type is a card reader mode, in which a terminal device supporting NFC functionality, such as a mobile phone, can be used as a card reader to read information from or write data to media such as tags, stickers, postcards, newspapers, and business cards with NFC chips. In one or more implementations of this specification, these media may be referred to as NFC tags or NFC devices.

[0035] The second type is the virtual card mode, in which a terminal device that supports NFC functions, such as a mobile phone, can be used as an IC card such as a debit card, credit card, bus card, access card, etc. The basic principle is that the information on the corresponding IC card is packaged as a data packet and stored in a terminal device that supports NFC functions, such as a mobile phone.

[0036] The third type is point-to-point mode, in which two terminal devices that support NFC function can realize point-to-point data transmission, for example, a mobile phone and a tablet PC that support NFC function can realize point-to-point data transmission such as music, pictures, etc.

[0037] Here, the first NFC operation mode, i.e., the operation mode in which a terminal device such as a mobile phone serves as a card reader, may be used in application scenarios such as payment, meal ordering, information transmission, etc., and the card reader may be used to read tag information of the NFC device. For example, in a payment scenario, the card reader can read payment information of the NFC device, and in a meal ordering scenario, the card reader can read meal ordering information of the NFC device.

[0038] An example of an application in which a mobile phone serves as a card reader for payment will be described below.

[0039] As shown in (a) of FIG. 1, a payment scenario may include an NFC device 10 (which may also be called an NFC tag) and a mobile phone 20. Here, the NFC device 10 may be a deposit device, a code card, etc. After the mobile phone 20, with its screen on or unlocked, approaches the NFC device 10, the NFC device 10 can sense the user's mobile phone 20 and communicate with it to transmit 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. The user performs a payment operation on the mobile phone 20 according to this payment page (e.g., the user clicks the payment control "Confirm Payment" displayed on the payment page, or enters the corresponding payment amount and then clicks the payment control "Confirm Payment" displayed on the payment page), and the payment is completed. Then, as shown in (c) of FIG. 1, the user's mobile phone 20 can display a payment completion page, thereby completing the payment from the user to the merchant. Compared with the code scanning payment method, the above payment method can shorten the user's payment path and improve the user's payment experience.

[0040] When using a mobile phone as a card reader, the power consumption of the mobile phone must be taken into consideration. In order to reduce the power consumption of the mobile phone and save power, the following method may be adopted to read the tag information of an NFC device: first, adopt low power card detection (LPCD) mode to detect whether an NFC device is nearby, and if an NFC device is detected nearby, exit the LPCD mode and adopt standard card detection mode to read the tag information of the NFC device. Here, because the power consumed in the LPCD mode is less than the power consumed in the standard card detection mode, adopting the LPCD mode can reduce the power consumption of the mobile phone.

[0041] For example, the mobile phone may determine whether an NFC device is present nearby by employing the following method: the mobile phone emits a sounding signal (search signal) in LPCD mode, and if an NFC device is present nearby, the NFC device changes the sounding signal emitted by the mobile phone. For example, the NFC device reduces the amplitude or phase of the sounding signal by consuming some of the energy of the sounding signal. The mobile phone may use software or hardware to detect whether the change in the sounding signal exceeds a change detection threshold. If it detects that the change in the sounding signal exceeds the change detection threshold, the mobile phone confirms the presence of an NFC device nearby, then exits LPCD mode, switches to standard card detection mode, and reads information from the NFC device. If it detects that the change in the sounding signal does not exceed the change detection threshold, the mobile phone confirms that no NFC device is present nearby, and continues to emit a sounding signal in LPCD mode.

[0042] Although the LPCD mode can reduce the power consumption of a mobile phone, the signal strength of the sounding signal emitted in the LPCD mode is weak, so the change in the sounding signal emitted by the NFC device is relatively small and may not be sufficient to exceed the change detection threshold. Thus, in the LPCD mode, the sensing distance at which a mobile phone can read NFC device information is significantly reduced, resulting in a decrease in sensitivity. However, different models of mobile phones have different change thresholds or different detection sensitivities for sounding signal changes. Therefore, in the LPCD mode, the probability of a mobile phone detecting a change in the sounding signal may be relatively low, resulting in a relatively low card reading success rate and a serious impact on the user experience. For example, some mobile phones may need to emit the sounding signal multiple times to successfully read tag information. For example, some mobile phones may still not be able to successfully read tag information even after emitting the sounding signal multiple times.

[0043] To solve the above problem of a relatively low card reading success rate in LPCD mode when a 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 which an NFC device can detect whether it has received a sounding signal, and if it detects the sounding signal, the NFC device can emit a jamming signal synchronously with the period when the mobile phone emits the sounding signal, so that the jamming signal and the sounding signal interfere with each other and then cause the mobile phone to exit LPCD mode, thereby improving the card reading success rate of the mobile phone.

[0044] DETAILED DESCRIPTION OF THE INVENTION An exemplary embodiment of a short-range wireless communication method according to one or more embodiments of the present specification will now be described.

[0045] Referring to Figure 2, Figure 2 is a flowchart of a short-range wireless communication method according to one or more embodiments of the present specification. This method may be used in an application scenario where a terminal device such as a mobile phone is used as a card reader. As shown in Figure 2, this method may include the following steps: Step S102: The card reader periodically emits a sounding signal in LPCD mode.

[0046] The period at which different card reading devices emit the sounding signal, the duration of the sounding signal, the amplitude, phase, etc. of the sounding signal may be different, and one or more embodiments herein are not limited thereto.

[0047] Step S104: The NFC device detects the sounding signal emitted by the card reading device.

[0048] It should be noted that in one or more embodiments herein, a signal emitted by a card reading device in LPCD mode is referred to as a sounding signal, and a signal emitted by a card reading device in standard card detection mode is referred to as a card read request signal. Here, the sounding signal is different from the card read request signal, for example, the sounding signal is different from the card read request signal in terms of signal strength, modulation method, carried information, etc. In this way, the NFC device can determine whether the detected signal is a sounding signal or a card read request signal based on characteristic information such as signal strength, modulation method, carried information, etc.

[0049] For example, detecting that the received signal is a sounding signal may be performed by determining whether first characteristic information is detected, where the first characteristic information is characteristic information of the sounding signal emitted by the card reading device in LPCD mode, such as signal strength, modulation method, carried information, etc. If it is determined that the first characteristic information is detected, it is determined that the sounding signal is detected.

[0050] Similarly, detecting that the received signal is a card read request signal can be performed by determining whether second characteristic information is detected, where the second characteristic information is characteristic information of the card read request signal emitted by the card reading device in standard card detection mode, such as signal strength, modulation method, carried information, etc. If it is determined that the second characteristic information is detected, it is determined that the card read request signal has been detected.

[0051] If it is determined that the detected signal is a sounding signal, it may further determine whether the transmission status of the detected sounding signal (hereinafter, the detection of a first sounding signal will be described as an example, and the first sounding signal may be the sounding signal that is detected earliest by the NFC device among the sounding signals emitted by the card reading device in LPCD mode) satisfies the condition of an interference superimposed signal.

[0052] Here, the transmission state of the first sounding signal may include transmission end and transmission not end. When the transmission state of the first sounding signal is transmission end, the jamming signal emitted by the NFC device cannot spatially interfere with and overlap with the first sounding signal. When the transmission state of the first sounding signal is transmission not end, the jamming signal emitted by the NFC device can spatially interfere with and overlap with the first sounding signal. Therefore, in one or more embodiments herein, if the transmission state of the sounding signal satisfies the condition of an interference superimposed signal, the transmission state of the sounding signal may be set to transmission not end. In other words, the condition of an interference superimposed signal can be met at any one time before the sounding signal transmission ends.

[0053] In this way, the jamming signal can change the amplitude and / or phase of the first sounding signal by spatially interfering with any part of the first sounding signal. For example, the jamming signal may be emitted at the start, middle, or end approaching stage of emission of the first sounding signal.

[0054] The sounding signal may be a pulse signal, and the pulse signal may be divided into a rising edge phase, a stable high level phase (which may also be called a flat top period), and a falling edge phase in order of emission time. Thus, in one or more embodiments herein, based on the level or waveform of the first sounding signal, it may be determined that the detected first sounding signal is in the rising edge phase, the stable high level phase, or the falling edge phase, and further, a jamming signal may be synchronously emitted in the rising edge phase, the stable high level phase, or the falling edge phase.

[0055] In one possible implementation manner, determining that the transmission state of the first sounding signal satisfies the condition of an interference superimposed signal may be realized by adopting the following manner: after determining that the first sounding signal is detected, monitor a rising edge transition event based on the level or waveform of the first sounding signal, and if a rising edge transition event is monitored (if a rising edge transition event is detected), determine that the transmission state of the first sounding signal has been detected to satisfy the condition of an interference superimposed signal.

[0056] Illustratively, the NFC device may detect whether there is a rising edge transition in the level of the first sounding signal in a preset time window, and if there is a rising edge transition in the detected level of the first sounding signal, the NFC device may determine that a rising edge transition event has been detected.

[0057] For example, the preset time window may be 1 μs, and if within 1 μs there is a level corresponding to a later point in time that is higher than a previous point in time, and the difference value between the two levels is greater than a level threshold, it may be determined that a rising edge transition exists within this 1 μs, and further that a rising edge transition event has been detected.

[0058] The first sounding signal lasts for a certain period of time, for example, 35 μs. After determining that a rising edge transition event has been detected, the NFC device may then emit a jamming signal, synchronously with the first sounding signal as much as possible, to create spatial interference.

[0059] In one possible implementation manner, determining that the transmission state of the first sounding signal satisfies the condition of an interference-superimposed signal may adopt the following manner: after determining that the first sounding signal has been detected, determine whether the flat-top period of the first sounding signal has been reached based on the level or waveform of the first sounding signal; if it is determined that the flat-top period of the first sounding signal has been reached, determine that the transmission state of the first sounding signal has been detected to satisfy the condition of an interference-superimposed signal.

[0060] To ensure that the card reading device detects the presence of an NFC tag in its vicinity as quickly as possible, the NFC device may emit a jamming signal immediately after detecting a rising edge transition event, i.e., when a rising edge transition event is detected. In this way, the jamming signal can cause a change in the first sounding signal as quickly as possible, while the jamming signal and the first sounding signal can be overlapped with each other for a sufficiently long time to improve the jamming effect. Generally, after the card reading device emits the first sounding signal and before it emits the second sounding signal, the card reading device can accurately read the tag information of the NFC device, such as payment information.

[0061] Step S106: When the NFC device detects that the transmission state of the first sounding signal satisfies the condition of an interference superimposed signal, it emits a jamming signal, and causes the jamming signal and the first sounding signal to be interfered with and superimposed, and then causes the card reading device to exit from the LPCD mode.

[0062] When the NFC device detects that the transmission state of the first sounding signal meets the conditions of an interference superimposed signal, the NFC device may emit a jamming signal in the following manner: when the NFC device detects that the transmission state of the first sounding signal meets the conditions of an interference superimposed signal, the NFC device may first determine target jamming signal parameters, and then generate a jamming signal based on the target jamming signal parameters, and then the NFC device may emit the jamming signal.

[0063] Here, the target interference signal parameters may include a target amplitude, a target phase, a target duration, and a target frequency for generating the interference signal.

[0064] Optionally, in one or more implementations herein, the NFC device may set the same target jamming signal parameters for different card reading devices, where the target jamming signal parameters may be jamming signal parameters with relatively good jamming effects determined during the research and development testing phase.

[0065] Optionally, in one or more implementations of the present specification, the NFC device may set different target jamming signal parameters for different card reading devices. In this case, the NFC device may adopt the following manner to determine the target jamming signal parameters: when detecting that the transmission state of the first sounding signal satisfies the condition of an interference superimposed signal, determine a first device model number corresponding to the card reading device, obtain jamming signal configuration information, the configuration information including at least one second device model number and jamming signal parameters respectively corresponding to each second device model number, and determine the jamming signal parameters corresponding to the first device model number in the configuration information as the target jamming signal parameters.

[0066] That is, the NFC device may be pre-configured with jamming signal parameters such as amplitude, phase, duration and frequency corresponding to different device models, and after determining the device model corresponding to the current card reading device, target jamming signal parameters such as target amplitude, target phase, target duration and target frequency corresponding to the current card reading device may be matched from the configuration information.

[0067] Here, the NFC device may determine the device model number corresponding to the current card reading device by adopting the following manner, that is, the NFC device may be pre-configured with signal characteristics of sounding signals respectively corresponding to different device models, for example, the signal characteristics may include at least one of the amplitude, phase, and duration of the sounding signal. In this way, the NFC device may determine the device model number corresponding to the current card reading device based on the received first sounding signal, and then the NFC device may generate and emit a jamming signal based on the target jamming signal parameters corresponding to the device model number to which the current card reading device belongs.

[0068] In this way, a matching jamming signal can be generated for each different card reading device, so as to better realize the jamming effect on the first sounding signal.

[0069] Here, the target duration may be the same as the duration of the first sounding signal, and the target frequency may be the same as the frequency of the first sounding signal, so that the jamming signal can be emitted synchronously with the period during which the card reading device continuously emits the first sounding signal, thereby achieving a better interference effect.

[0070] In one or more embodiments herein, the specific parameters of the target phase are not limited. For example, the target phase may be opposite to the phase of the first sounding signal, or the phase angle between the target phase and the phase of the first sounding signal may be greater than or equal to 0° and less than 180°.

[0071] Here, when the target phase is opposite to the phase of the first sounding signal, the amplitude of the first sounding signal can be reduced after the interference signal having the opposite phase interferes with the first sounding signal. In this way, the card reading device can satisfy the following LPCD mode exit condition, which further includes detecting that the amplitude of the first sounding signal has decreased.

[0072] Step S108: if the card reading device detects that the variation of the first sounding signal is greater than the variation threshold, it ends the low power consumption card detection mode.

[0073] After the interference signal and the first sounding signal are spatially superimposed, a relatively large change can be generated in the first sounding signal, so that most card reading devices can detect that the signal change of the interference signal relative to the first sounding signal is larger than a change threshold. For example, the amplitude change between the interference signal and the first sounding signal may be larger than the sensitivity of the card reading device to detect the amplitude change (or larger than the amplitude change threshold), and / or the phase change between the interference signal and the sounding signal may be larger than the sensitivity of the card reading device to detect the phase change (or larger than the phase change threshold).

[0074] In this manner, the card reading device can exit LPCD mode by detecting a change in the first sounding signal and determining the presence of an NFC device in the vicinity based on the change in the first sounding signal.

[0075] Step S110, the card reading device emits a card reading request signal in standard card detection mode.

[0076] After detecting the presence of an NFC device nearby, the card reading device may exit the LPCD mode and adopt the standard card detection mode to emit a card reading request signal, which may carry request information, such as to read information from or write information to the NFC device.

[0077] Step S112: After sensing the card reading request signal, the NFC device sends a response signal to the card reading device.

[0078] After detecting the card reading request signal, the NFC device may transmit a response signal to the card reading device, where the response signal may carry response information corresponding to the request information, and after receiving the response information, the card reading device may perform an interaction operation, such as data transmission, with the NFC device.

[0079] For example, as shown in FIG. 3, in the LPCD mode, the card reading device may emit a sounding signal at regular intervals (i.e., periodically emit a sounding signal), and each sounding signal may last for a certain period of time. In the first emission period, after the card reading device starts emitting the first sounding signal, the NFC device may detect that the card reading device has emitted the first sounding signal. If the NFC device detects that the transmission status of the first sounding signal meets the condition of an interference superimposed signal, the NFC device may emit an interference signal. After the interference signal interferes with the first sounding signal, the card reading device detects a change in the first sounding signal, and accordingly, the card reading device exits the LPCD mode, switches to the standard card detection mode, and emits a card read request signal. As shown in FIG. 3, the card read request signal may be emitted before the second sounding signal. In this way, the card reading device can successfully read the tag information of the NFC device by emitting a sounding signal once.

[0080] As described above, one or more embodiments of this specification enable the NFC device to emit a jamming signal to jam the first sounding signal, thereby increasing the signal change amount of the first sounding signal, thereby improving the probability that card reading devices of different models will detect the change in the first sounding signal, and improving the card reading success rate of card reading devices of different models.

[0081] Next, according to the solution according to one or more embodiments of the present specification, the NFC device emits an interference signal to increase the signal change amount of the sounding signal, while the logic by which the card reading device determines whether an NFC device is present nearby remains unchanged, so that problems such as the card reading device ejecting the virtual card (the virtual card popping out) after detecting the interference signal do not occur.

[0082] Here, the ejection of the virtual card refers to a card reading device that supports both the card reader mode and the virtual card mode, and when it detects a signal emitted outside the sounding signal, it may assume that another card reading device is nearby and may eject the corresponding virtual card so that the other card reading device can read the information. It should be understood that the solution according to one or more embodiments of the present specification synchronizes the emission of a jamming signal to jam the sounding signal during the emission period of the sounding signal, and does not transmit an independent signal to the card reading device outside the sounding signal, so that the card reading device does not eject the virtual card.

[0083] The inventors have found that there may be individual situations in which the card reading device still cannot successfully read the tag information of the NFC device after emitting the jamming signal, for example, for a card reading device with a relatively low detection sensitivity of the amount of change in the first sounding signal, its card reading success rate is still relatively low.

[0084] In the above situation, the following method can be adopted to further improve the card reading success rate of the card reading device. If the card reading request signal is not received within a preset time length after emitting the interference signal, the card reading device redetects the sounding signal emitted in the LPCD mode, and if a second sounding signal is detected, an excitation signal is emitted after the second sounding signal generation period, causing the card reading device to exit the LPCD mode.

[0085] For example, as shown in FIG. 4, in the first emission period in LPCD mode, after the card reading device starts emitting a first sounding signal, the NFC device may detect a rising edge event of the first sounding signal and synchronously emit a jamming signal. However, after the jamming signal jams the first sounding signal, the card reading device does not detect a change in the first sounding signal. Therefore, the NFC device does not receive a card read request signal within a preset time period after emitting the jamming signal. In this case, the NFC device detects the sounding signal, and if it detects a second sounding signal, the NFC device may emit an excitation signal after the second and third sounding signals.

[0086] As shown in FIG. 4, the excitation signal and the second sounding signal are emitted at different times and do not overlap, i.e., the excitation signal does not affect the previously emitted second sounding signal. After receiving the excitation signal, the card reading device may initially believe that the excitation signal is a signal emitted from another card reading device to excite the current card reading device and read tag information from the current card reading device. In other words, in this case, the card reading device may believe that the excitation signal is intended to indicate the presence of another card reading device nearby, and the card reading device may be requested to be used as a virtual card. Based on this, the card reading device may further determine whether the excitation signal is intended to indicate the presence of another card reading device nearby or the presence of an NFC device nearby. If the card reading device determines that the excitation signal is intended to indicate the presence of an NFC device nearby, it may exit the LPCD mode and emit a card read request signal. Because it takes the card reading device some time to determine that the excitation signal is intended to indicate the presence of an NFC device in the vicinity, the card reading device may emit a card read request signal after emitting the third sounding signal, as shown in FIG. 4.

[0087] It should be noted that one or more embodiments herein are not limited to specific parameters of the excitation signal, for example, the excitation signal may be a null carrier signal, and thus the card reading device can determine whether the excitation signal is intended to indicate the presence of another card reading device nearby or the presence of an NFC device nearby based on whether the excitation signal is a null carrier signal.

[0088] It should be further explained that the second sounding signal may be any sounding signal after the first sounding signal, and one or more embodiments herein are not limited thereto.

[0089] In this way, if the jamming signal does not successfully jam the first sounding signal, the card reading device can be further brought out of the LPCD mode by the excitation signal, thereby improving the card reading success rate of the card reading device.

[0090] It is understood that the above embodiments are merely examples, and the above embodiments can be modified when actually implemented. As can be understood by those skilled in the art, any modification of the above embodiments without creative effort falls within the scope of protection of one or more embodiments of this specification, and will not be further described in the embodiments.

[0091] Based on the same inventive concept, one or more embodiments of the present specification further provide an NFC device, and since the principle of how the NFC device solves the problem is similar to that of the aforementioned NFC method, the implementation of the NFC device can be referred to the implementation of the aforementioned NFC method, and the repeated points will not be further described.

[0092] 5, which is a structural block diagram of an NFC device according to one or more embodiments of the present disclosure. As shown in FIG. 5, the NFC device 200 may include a signal processing module 201 and a signal generating module 202, where: The signal processing module 201 is used to detect the sounding signal emitted by the card reading device in a low-power card detection mode; When the signal generating module 202 detects that the transmission state of the first sounding signal satisfies the condition of an interference superimposed signal, it generates and emits a jamming signal, and causes the jamming signal and the first sounding signal to be interfered with and superimposed, and then causes the card reading device to exit the low-power card detection mode, where the first sounding signal is the sounding signal that is detected earliest by the near-field wireless communication device among the sounding signals emitted by the card reading device in the low-power card detection mode.

[0093] In one possible implementation, the signal processing module 201 may be further used to detect a sounding signal emitted by the card reading device in a low-power card detection mode when a card read request signal is not received within a preset time length after emitting the jamming signal, where the card read request signal is a signal emitted by the card reading device in a standard card detection mode, and the signal generating module 202 may be further used to generate and emit an excitation signal after the second sounding signal when the second sounding signal is detected, so as to cause the card reading device to exit the low-power card detection mode.

[0094] 5, the NFC device 200 may further include a signal transceiving module 203 and an NFC chip 204. Here, the signal processing module 201, the signal generating module 202, and the NFC chip 204 may all be connected to the signal transceiving module 203, and the signal generating module 202 may be connected between the signal processing module 201 and the signal transceiving module 203. The signal generating module 202 may be used to generate a jamming signal and emit the jamming signal through the signal transceiving module 203. The NFC chip 204 may be used to transmit data to and from a card reading device.

[0095] Here, the signal processing module 201 may be realized by a combination of software and hardware, or may be realized by a simple hardware method, and one or more embodiments of this specification are not limited thereto.

[0096] 6 and 7 will be used in combination to exemplarily describe the signal processing module 201 implemented by a combined software and hardware manner according to one or more embodiments of the present specification.

[0097] 6, the signal processing module 201 may include an analog-to-digital converter (ADC) 2011 and a processor 2012. Here, the signal transmitting and receiving module 203 may be connected to the ADC 2011 and the signal generating module 202, respectively, and the processor 2012 may be connected between the ADC 2011 and the signal generating module 202.

[0098] Here, the ADC 2011 may be used to convert the electromagnetic field signal received by the signal transceiving module 203 into a digital signal, and output the digital signal to the processor.

[0099] The processor 2012 may be used to determine whether first characteristic information is detected based on the digital signal, where the first characteristic information is characteristic information of a sounding signal emitted by the card reading device in low power card detection mode, determine that a first sounding signal has been detected if it is determined that the first characteristic information has been detected, monitor a rising edge transition event based on the level of the first sounding signal, and determine that if a rising edge transition event is monitored, it has been detected that the transmission state of the first sounding signal satisfies the condition of an interference superimposed signal.

[0100] Here, the processor 2012 may be any device with signal processing capabilities. For example, the processor may be a microcontroller unit (MCU). After receiving the digital signal, the processor can process the digital signal through software.

[0101] In one possible implementation, the processor 2012 may further be used to determine target jamming signal parameters and control the signal generation module to generate a jamming signal based on the target jamming signal parameters when it detects that the transmission state of the first sounding signal satisfies the conditions of an interference superimposed signal.

[0102] In one possible implementation, when the processor 2012 detects that the transmission state of the first sounding signal satisfies the conditions of an interference superimposed signal, it may be used to determine a first device model number corresponding to the card reading device, obtain configuration information for a jamming signal, wherein the configuration information includes at least one second device model number and jamming signal parameters corresponding to each of the second device model numbers, and determine the jamming signal parameters corresponding to the first device model number in the configuration information as target jamming signal parameters.

[0103] In one possible implementation, the target interference signal parameters may include a target amplitude, a target phase, a target duration, and a target frequency, where the target phase is opposite to the phase of the first sounding signal and the target frequency is the same as the frequency of the first sounding signal.

[0104] Here, the signal generating module 202 may be a hardware structure for generating a jamming signal, such as an active crystal oscillator or an RC oscillator circuit, and one or more embodiments of the present specification are not limited thereto. Specifically, after receiving a control command issued by the processor 2012, the signal generating module 202 may generate a jamming signal based on target jamming signal parameters in the control command.

[0105] 6 , the signal transceiving module 203 may include a first antenna 2031, where the ADC 2011, the signal generating module 202, and the NFC chip 204 may all be connected to the first antenna 2031. In this case, the first antenna 2031 may be time-division multiplexed. For example, before receiving a card reading request signal, the first antenna 2031 may be used by the ADC 2011 and the signal generating module 202 to transmit and receive signals. After receiving a card reading request signal, the first antenna 2031 may be used by the NFC chip 204 to transmit and receive signals.

[0106] 7, the signal transmitting and receiving module 203 may include a first antenna 2031 and a second antenna 2032. Here, the NFC chip 204 may be connected to the first antenna 2031, and the ADC 2011 and the signal generating module 202 are both connected to the second antenna 2032.

[0107] An exemplary signal processing module 201 implemented in a purely hardware manner according to one or more embodiments of the present disclosure will now be described with reference to FIG.

[0108] 8, the signal processing module 201 may include a rising edge detection circuit 2013 and a controller 2014. Here, the rising edge detection circuit 2013 and the signal generation module 202 may be connected to the signal transmission / reception module 203, and the controller 2014 may be connected between the rising edge detection circuit 2013 and the signal generation module 202.

[0109] In one possible implementation, any one or more of the rising edge detection circuit 2013, the controller 2014, and the signal generating module 202 may be integrated into an NFC chip 204; or The rising edge detection circuit 2013, the controller 2014 and the signal generating module 202 may be independent of the NFC chip 204, respectively; Here, the rising edge detection circuit 2013 may be used to determine whether first characteristic information is detected, where the first characteristic information is characteristic information of a sounding signal emitted by a card reading device in low power card detection mode; determine that a first sounding signal is detected if it is determined that the first characteristic information is detected; monitor a rising edge transition event based on the level of the first sounding signal; and determine that it has been detected that the transmission state of the first sounding signal satisfies the condition of an interference superimposed signal if it is monitored that a rising edge transition event has been detected.

[0110] The controller 2014 may be used to determine target interference signal parameters and control the signal generation module to generate an interference signal based on the target interference signal parameters when it detects that the transmission state of the first sounding signal satisfies the conditions of an interference superimposed signal.

[0111] In one possible implementation, when the controller 2014 detects that the transmission state of the first sounding signal meets the conditions of an interference superimposed signal, it may be used to determine a first device model number corresponding to the card reading device, obtain configuration information for a jamming signal, where the configuration information includes at least one second device model number and jamming signal parameters corresponding to each of the second device model numbers, and determine the jamming signal parameters corresponding to the first device model number in the configuration information as target jamming signal parameters.

[0112] In one possible implementation, the controller 2014 may set the same target interference signal parameters for different card reading devices, thereby reducing the complexity of the circuit design of the controller 2014.

[0113] It should be noted that the functional principles of each component in the NFC device 200 are the same as the principles of implementing the corresponding steps in the above-mentioned near field communication method. For specific details, please refer to the descriptions of the corresponding parts in the above-mentioned method embodiments, and no further description will be given here.

[0114] It should be noted that the components shown in Figures 5 to 8 are exemplary, and other types of structures may be used to supplement or replace the structures to achieve telecommunication or other functions. It should be noted that the NFC device 200 may further include components not shown in Figures 5 to 8, and reference may be made to the prior art.

[0115] In some alternative implementations, the NFC device 200 may further include components such as a memory, a communication module, an input unit, an audio processor, a display, a power supply, and the like.

[0116] Here, a memory may be coupled to the signal processing module 201, and the memory may be one or more of a buffer, a flash memory, a hard drive, a removable medium, a volatile memory, a non-volatile memory, or other suitable devices. A program of information related to the execution of the short-range wireless communication method described above may be stored in the memory. The signal processing module 201 may then execute the program stored in the memory to achieve information storage, processing, etc.

[0117] The memory may be a solid-state memory, such as a read-only memory (ROM), a random-access memory (RAM), a SIM card, or the like. It may also be a memory that retains information even when power is turned off, is selectively erasable, and is provided with more data; an example of this memory is sometimes called an EPROM. The memory may also be some other type of device. The memory may include a buffer memory (sometimes called a buffer). The memory may include an application / function storage unit, which is used to store application programs and function programs or to execute the operation flow of the NFC device 200 by the signal processing module 201.

[0118] The memory may further include a data storage portion used to store data such as contacts, digital data, pictures, voice and / or any other data used by the payment device. A driver storage portion of the memory may include various drivers of the computing device for performing communication functions and / or other functions of the computing device (e.g., messaging applications, address book applications, etc.).

[0119] The input unit can provide input to the signal processing module 201. The input unit can be, for example, a button 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 objects such as images and text. The display can be, for example, but is not limited to, an LCD display.

[0120] 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 received output signals, which may be the same as in a typical mobile communication terminal.

[0121] 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, may be installed in the same computer device. The communication module (transmitter / receiver) is further coupled to a speaker and a microphone via an audio processor to provide audio output via the speaker and receive audio input from the microphone, thereby realizing general telecommunication functions. The audio processor may include any appropriate buffers, decoders, amplifiers, etc. The audio processor is also coupled to the signal processing module 201, thereby enabling recording on the local machine via the microphone and playing back audio stored on the local machine via the speaker.

[0122] One or more embodiments of the present specification further provide a computer-readable storage medium capable of implementing all the steps of the short-range wireless communication method in the above embodiments, the computer-readable storage medium storing a computer program, which, when executed by a processor, implements all the steps of the short-range wireless communication method in the above embodiments.

[0123] One or more embodiments of this specification provide operational steps of the method in the embodiment or flowchart, but ordinary or uninventive efforts may include more or fewer operational steps. The order of steps listed in the embodiment is merely one way of executing many steps and does not represent a unique execution order. When an actual device or client product is executed, it may be executed according to the method order shown in the embodiment or drawings, or may be executed in parallel (e.g., in a parallel processor or multi-threaded processing environment).

[0124] Those skilled in the art should appreciate that the embodiments herein may be provided as a method, apparatus, or computer program product. As such, the embodiments herein may take the form of an entirely hardware embodiment, an entirely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, one or more embodiments herein may take the form of a computer program product embodied on one or more computer-usable storage mediums (including, but not limited to, magnetic disk memories, CD-ROMs, optical memories, etc.) containing computer-usable program code.

[0125] One or more embodiments herein are described with reference to flowcharts and / or block diagrams of methods, apparatus (systems), and computer program products according to one or more embodiments herein. It should be understood that each flow and / or block in the flowcharts and / or block diagrams, and combinations of flows and / or blocks in the flowcharts 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, a special-purpose computer, an embedded processor, or other programmable data processing device to cause a machine, such that the instructions executed by the processor of the computer or other programmable data processing device, cause an apparatus to implement the function(s) specified in one or more flows in the flowcharts and / or one or more blocks in the block diagrams.

[0126] These computer program instructions may be stored in a computer-readable memory that can cause a computer or other programmable data processing device to operate in a particular manner, causing the instructions stored in the computer-readable memory to generate an article of manufacture that includes an instruction apparatus that implements the functions specified in one or more flows of the flowcharts and / or one or more blocks of the block diagrams.

[0127] These computer program instructions may be loaded onto a computer or other programmable data processing device and cause the computer or other programmable apparatus to perform a series of operational steps to generate a computer-implemented process, whereby the instructions executed on the computer or other programmable apparatus provide steps for implementing the functions specified in one or more flows of the flowcharts and / or one or more blocks of the block diagrams.

[0128] Each embodiment in this specification is described in a step-by-step manner, and the same or similar parts between the embodiments may be mutually referred to, and the emphasis of each embodiment is on the differences from other embodiments. In particular, the device and system embodiments are basically similar to the method embodiments, so that the description is relatively simple, and the relevant points may be referred to the description of the method embodiments.

[0129] As used herein, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply the existence of any such actual relationship or ordering between those entities or operations. Furthermore, the terms "comprise," "include," "includes," or any other variant thereof are intended to cover a non-exclusive "comprise," whereby a process, method, article, or device comprising a set of elements not only includes those elements, but also other elements not expressly listed, or further elements inherent in such process, method, article, or device. Those skilled in the art will be able to understand the specific meanings of the above terms in one or more embodiments of this specification, depending on the specific circumstances.

[0130] It should be noted that, unless there is a conflict, one or more embodiments and features of the embodiments herein may be combined with one another. One or more embodiments herein are not limited to any single aspect, nor to any single embodiment, nor to any combination and / or permutation of these aspects and / or embodiments. Each aspect and / or embodiment of one or more embodiments herein may be used alone or in combination with one or more other aspects and / or embodiments.

[0131] Finally, it should be noted that the above embodiments are only used to describe the technical solutions of one or more embodiments of this specification, and are not intended to limit the same. Although one or more embodiments of this specification have been described in detail with reference to the above embodiments, it should be understood by those skilled in the art that the technical solutions described in the above embodiments can still be modified or some or all of the technical features thereof can be replaced with equivalents, and such modifications or replacements do not cause the essence of the relevant technical solutions to depart from the scope of the technical solutions of one or more embodiments of this specification, and all of these should be included in the scope of one or more embodiments of this specification.

[0132] Although one or more embodiments of the present specification have been described in connection with the above optional embodiments, these embodiments are merely exemplary and illustrative, and various substitutions and improvements can be made to one or more embodiments of the present specification, all of which fall within the scope of protection of one or more embodiments of the present specification.

Claims

1. A short-range wireless communication method used in a short-range wireless communication device, the short-range wireless communication method comprising: Detecting a sounding signal emitted by the card reading device in a low power card detection mode; a step of emitting a jamming signal when detecting that the transmission state of a first sounding signal satisfies the condition of an interference superimposed signal, causing the jamming signal and the first sounding signal to interfere with each other, and then causing the card reading device to exit the low power consumption card detection mode, wherein the first sounding signal is the sounding signal that is detected earliest by the near field communication device among the sounding signals emitted by the card reading device in the low power consumption card detection mode.

2. Detecting a sounding signal emitted by the card reading device in a low-power card detection mode includes: determining whether first characteristic information is detected, the first characteristic information being characteristic information of a sounding signal emitted by the card reading device in a low power card detection mode; determining that a first sounding signal has been detected when determining that the first feature information has been detected; monitoring a rising edge transition event based on a level of the first sounding signal; and determining that the transmission state of the first sounding signal satisfies the condition of an interfering signal when a rising edge transition event is monitored.

3. When detecting that the transmission state of the first sounding signal satisfies the condition of an interference superimposed signal, emitting a jamming signal is determining target interference signal parameters when detecting that the transmission state of the first sounding signal satisfies the condition of an interference superimposed signal; generating a jamming signal based on the target jamming signal parameters; 2. The method of claim 1, further comprising: emitting said jamming signal.

4. determining a target interfering signal parameter when detecting that the transmission state of the first sounding signal satisfies a condition of an interference superimposed signal; determining a first device model number corresponding to the card reading device when detecting that the transmission state of the first sounding signal satisfies the condition of an interference superimposed signal; Obtaining configuration information of a jamming signal, the configuration information including at least one second device model number and jamming signal parameters respectively corresponding to each of the second device model numbers; 4. The method of claim 3, further comprising determining a jamming signal parameter corresponding to the first device model number in the configuration information as a target jamming signal parameter.

5. 4. The method of claim 3, wherein the target interference signal parameters include a target amplitude, a target phase, a target duration, and a target frequency, wherein the target phase is opposite to the phase of the first sounding signal and the target frequency is the same as the frequency of the first sounding signal.

6. 2. The method according to claim 1, wherein the amplitude change between the interference signal and the first sounding signal after the interference signal and the first sounding signal are interference-superimposed is greater than a detection threshold for the amplitude change by the card reading device, and / or the phase change between the interference signal and the first sounding signal is greater than a detection threshold for the phase change by the card reading device.

7. The method comprises: If a card read request signal is not received within a preset time period after emitting the jamming signal, detecting a sounding signal emitted by the card reading device in a low-power card detection mode, where the card read request signal is a signal emitted by the card reading device in a standard card detection mode; 2. The method of claim 1, further comprising, upon detection of a second sounding signal, emitting an excitation signal after an emission period of the second sounding signal to cause the card reading device to exit the low power card detection mode.

8. The method comprises: determining whether second characteristic information is detected within a preset time period after emitting the jamming signal, the second characteristic information being characteristic information of a card read request signal emitted by the card reading device in a standard card detection mode; 8. The method of claim 7, further comprising: determining that the card read request signal was not received if it is determined that the second characteristic information was not detected.

9. A near field communication device, comprising: a signal processing module and a signal generating module; The signal processing module is used to detect a sounding signal emitted by a card reading device in a low-power card detection mode; The signal generating module is used to generate and emit a jamming signal when it detects that the transmission state of the first sounding signal satisfies the condition of an interference superimposed signal, and to cause the card reading device to exit the low power consumption card detection mode after the jamming signal and the first sounding signal are interfered with and superimposed, and the first sounding signal is the sounding signal that is detected earliest by the near field communication device among the sounding signals emitted by the card reading device in the low power consumption card detection mode.

10. the signal processing module includes an analog-to-digital converter and a processor; The signal processing module is used to detect the sounding signal emitted by the card reading device in low-power card detection mode, specifically: the analog-to-digital converter is used to convert the received electromagnetic field signal into a digital signal and output the digital signal to the processor; The near field communication device of claim 9, wherein the processor is used to: determine whether first characteristic information is detected based on the digital signal, wherein the first characteristic information is characteristic information of a sounding signal emitted by a card reading device in a low power consumption card detection mode; determine that the first sounding signal has been detected if it is determined that the first characteristic information has been detected; monitor a rising edge transition event based on a level of the first sounding signal; and determine that it has been detected that the transmission state of the first sounding signal satisfies a condition of an interference superimposed signal if it is determined that a rising edge transition event has been detected.

11. 11. The short-range wireless communication device of claim 10, wherein the processor is further configured to, when detecting that the transmission state of the first sounding signal satisfies a condition of an interference-superimposed signal, determine target jamming signal parameters and control the signal generation module to generate a jamming signal based on the target jamming signal parameters.

12. The processor is used to determine target interfering signal parameters when detecting that the transmission state of the first sounding signal satisfies the condition of an interference superimposed signal, specifically, The short-range wireless communication device of claim 11, characterized in that when the processor detects that the transmission state of the first sounding signal satisfies the condition of an interference superimposed signal, it is used to determine a first device model number corresponding to the card reading device, obtain configuration information of a jamming signal, wherein the configuration information includes at least one second device model number and jamming signal parameters corresponding to each of the second device model numbers, and determine the jamming signal parameter corresponding to the first device model number in the configuration information as a target jamming signal parameter.

13. the signal processing module includes a rising edge detection circuit; The signal processing module is used to detect the sounding signal emitted by the card reading device in low-power card detection mode, specifically:

10. The short-range wireless communication device according to claim 9, wherein the rising edge detection circuit is used to: determine whether first characteristic information is detected, wherein the first characteristic information is characteristic information of a sounding signal emitted by a card reading device in a low-power card detection mode; determine that the first sounding signal is detected if it is determined that the first characteristic information is detected; monitor a rising edge transition event based on a level of the first sounding signal; and determine that it has been detected that the transmission state of the first sounding signal satisfies a condition of an interference superimposed signal if it is monitored.

14. the signal processing module further includes a controller; 14. The short-range wireless communication device of claim 13, wherein the controller is used to determine target jamming signal parameters and control the signal generation module to generate a jamming signal based on the target jamming signal parameters when detecting that the transmission state of the first sounding signal satisfies the condition of an interference-superimposed signal.

15. The controller is used to determine target interfering signal parameters when detecting that the transmission state of the first sounding signal satisfies the condition of an interference superimposed signal, specifically, The short-range wireless communication device of claim 14, characterized in that when the controller detects that the transmission state of the first sounding signal satisfies the condition of an interference superimposed signal, it is used to determine a first device model number corresponding to the card reading device and obtain setting information of a jamming signal, wherein the setting information includes at least one second device model number and jamming signal parameters corresponding to each of the second device model numbers, and determine the jamming signal parameter corresponding to the first device model number in the setting information as a target jamming signal parameter.

16. The card reader further includes a signal transceiving module and a short-range wireless communication chip, wherein the signal transceiving module is used to emit the jamming signal, and the short-range wireless communication chip is used to transmit data to and from the card reader; the signal transceiving module includes a first antenna and a second antenna, the near field communication chip is connected to the first antenna, the analog-to-digital converter and the signal generating module are respectively connected to the second antenna, and the processor is connected between the analog-to-digital converter and the signal generating module; or 11. The near field communication device of claim 10, wherein the signal transceiving module includes a first antenna, the near field communication chip, the analog-to-digital converter, and the signal generating module are each connected to the first antenna, and the processor is connected between the analog-to-digital converter and the signal generating module.

17. The card reader further includes a signal transceiving module and a short-range wireless communication chip, wherein the signal transceiving module is used to emit the jamming signal, and the short-range wireless communication chip is used to transmit data to and from the card reader; 15. The near field communication device of claim 14, wherein the rising edge detection circuit, the signal generating module and the near field communication chip are respectively connected to the signal transceiving module, and the controller is connected between the rising edge detection circuit and the signal generating module.

18. 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 near field communication device according to claim 17, wherein the rising edge detection circuit, the controller and the signal generation module are circuits independent of the near field communication chip.

19. 15. The near field communication device of claim 11 or 14, wherein the target jamming signal parameters include a target amplitude, a target phase, a target duration, and a target frequency, wherein the target phase is opposite to the phase of the first sounding signal, and the target frequency is the same as the frequency of the first sounding signal.

20. the signal processing module is further used to detect a sounding signal emitted by the card reading device in a low-power card detection mode when a card read request signal is not received within a preset time length after emitting the jamming signal, and the card read request signal is a signal emitted by the card reading device in a standard card detection mode; 10. The near field communication device of claim 9, wherein the signal generating module is further used, when detecting a second sounding signal, to generate and emit an excitation signal after an emission period of the second sounding signal to cause the card reading device to exit the low power card detection mode.

21. 9. A computer-readable storage medium having stored thereon computer program instructions which, when executed, implement the method of any one of claims 1 to 8.

22. A computer program comprising: A computer program product which, when executed by a processor, causes the processor to carry out the method of any one of claims 1 to 8.

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