WO2017076291A1

WO2017076291A1 - Smart card and peak current reducing method therefor

Info

Publication number: WO2017076291A1
Application number: PCT/CN2016/104343
Authority: WO
Inventors: 熊星
Original assignee: 国民技术股份有限公司
Priority date: 2015-11-03
Filing date: 2016-11-02
Publication date: 2017-05-11
Also published as: TW201717556A; TWI616075B; CN107004154A

Abstract

A smart card and a peak current reducing method therefor. The smart card comprises: a Bluetooth module (1) and a master control module (7), the Bluetooth module (1) comprising: a radio frequency open unit and a radio frequency close unit. The radio frequency open unit is used for informing the master control module (7) to run by reducing frequency in an interruption way before opening a radio frequency signal; and the radio frequency close unit is used for informing the master control module (7) to run by recovering normal frequency in the interruption way after closing the radio frequency signal. The peak current reducing method comprises the steps: informing the master control module (7) to run by reducing the frequency in the interruption way before the Bluetooth module (1) opens the radio frequency signal; and informing the master control module (7) to run by recovering the normal frequency in the interruption way after the Bluetooth module (1) closes the radio frequency signal. The smart card and the peak current reducing method therefor can perform peak shifting processing on the smart card, and reduce a peak current of the smart card.

Description

Smart card and method for reducing peak current thereof

Technical field

The present invention relates to the field of smart card technologies, and in particular, to a smart card for data communication through a Bluetooth module and a mobile terminal and a method for reducing peak current.

Background technique

With the development of mobile Internet and Bluetooth technology, more and more devices are beginning to connect with mobile phones via Bluetooth, among which Bluetooth smart cards are one of them. The so-called Bluetooth smart card is a smart card made by adding a Bluetooth module to a traditional smart card. This smart card not only has the traditional smart card function, but also can communicate with the application of the smart terminal (for example, the smart phone APP) through the Bluetooth module. Here, the smart card may be a SIM (Subscriber Identity Module) card, a USIM (Universal Subscriber Identity Module) card, a UIM (User Identify Module) card, or an SD card (Secure Digital Memory Card). Digital memory card).

In the existing Bluetooth smart card, functional modules other than the traditional smart card functions, such as a near field communication module, are added, so that the Bluetooth smart card has a near field payment function. However, due to the addition of the Bluetooth module and the near field communication module, the instantaneous peak current of the smart card is inevitably increased, and the current supplied to the smart card by the terminal device such as the mobile phone is limited, which may result in weak power supply capability of some card slots. Terminal devices cannot use such Bluetooth smart cards, causing terminal device compatibility issues.

Summary of the invention

The present invention is intended to provide a smart card and a method for reducing peak current thereof, which can effectively reduce the peak current of the smart card.

In one aspect, the present invention provides a smart card, including a Bluetooth module and a main control module; the Bluetooth module includes: a radio frequency turn-on unit and a radio frequency turn-off unit; and the radio frequency turn-on unit is configured to interrupt the radio frequency signal before being turned on. The main control module is notified to reduce the frequency operation; the radio frequency shutdown unit is configured to notify the main control module to resume normal frequency operation in an interrupted manner after the radio frequency signal is turned off.

As a preferred solution of the present invention, the main control module includes: a down-conversion operation unit and a recovery operation unit; the down-conversion operation unit is configured to operate at a low frequency after receiving the radio frequency on-off interruption; Used to run at normal frequency after receiving a radio shutdown interrupt.

Further, the smart card of the present invention further includes a short-range communication module; the short-range communication module is used for short-range communication of the smart card.

In one embodiment of the invention, the proximity communication module is an RCC technology proximity communication module.

In another embodiment of the invention, the proximity communication module is an NFC technology communication module.

In another aspect, the present invention also provides a method for reducing peak current based on the above smart card, comprising the steps of:

A. The Bluetooth module notifies the main control module to reduce the frequency operation in an interrupted manner before the RF signal is turned on;

B. After the radio frequency signal is turned off, the Bluetooth module notifies the main control module to resume normal frequency operation in an interrupted manner;

Further, the method for reducing peak current of the present invention further includes the steps of:

C. The main control module runs at a low frequency after receiving the radio frequency on interruption;

D. The main control module runs at a normal frequency after receiving the radio frequency shutdown interrupt.

As a preferred solution, before step A, the method includes the step of: turning on the bluetooth module.

As a preferred solution, before step C or step D, a step is included: determining whether the radio frequency on interrupt is.

Further, the method further includes the step of: the Bluetooth module receiving the interrupt return information sent by the main control module.

The invention has the beneficial effects that the Bluetooth module in the smart card can notify the main control module in an interrupted manner before the radio frequency signal is turned on and after the radio frequency signal is turned off, so that the main control module reduces the frequency operation before the radio frequency is turned on, and returns to normal after the radio frequency signal is turned off. The frequency is operated to achieve the purpose of reducing the peak current and completing the peak shift processing.

DRAWINGS

1 is a schematic structural diagram of a Bluetooth SIM card according to an embodiment of the present invention;

FIG. 2 is a schematic flow chart of the method for reducing the peak current provided by the present invention in the first embodiment.

detailed description

In order to explain the embodiments and technical solutions of the present invention more clearly, the technical solutions of the present invention will be described in more detail below with reference to the accompanying drawings and embodiments. It is obvious that the described embodiments are a part of the embodiments of the present invention, and not all Example. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments of the present invention without departing from the inventive scope are the scope of the present invention.

Generally, the Bluetooth smart card includes: a Bluetooth module and a main control module; wherein the Bluetooth module includes a Bluetooth antenna and a Bluetooth controller, wherein the Bluetooth antenna is used to transmit and receive radio frequency signals, and the Bluetooth controller completes processing of the radio frequency signal, and The main control module interacts; the main control module is usually the core control module of the smart card, which completes the control and information processing of each module of the smart card.

The embodiment of the present invention provides a smart card, which has a new Bluetooth module and a main control module, and is used to implement the method for reducing peak current provided by the present invention.

The Bluetooth module includes: a radio frequency turn-on unit and a radio frequency turn-off unit; the radio frequency turn-on unit is configured to notify the main control module to reduce frequency operation in an interrupted manner before turning on the radio frequency signal; Notifying the main control module in an interrupted manner after the RF signal is turned off Resume normal frequency operation.

The main control module includes: a down-conversion operation unit and a recovery operation unit; the down-conversion operation unit is configured to operate at a low frequency after receiving the radio frequency on-off interruption; and the recovery operation unit is configured to receive the radio frequency After the shutdown is turned off, it runs at the normal frequency.

An embodiment of the present invention provides a method for reducing peak current, which is implemented by a Bluetooth module. As shown in FIG. 2, the method includes:

Before the RF signal is turned on, the main control module is notified to reduce the frequency operation by means of an interrupt;

After the RF signal is turned off, the main control module is notified to resume normal frequency operation in an interrupted manner.

The embodiment of the invention further provides a method for reducing peak current, which is implemented by a main control module, as shown in FIG. 2, the method includes:

After receiving the RF on interrupt, it runs at a low frequency;

After receiving the RF shutdown interrupt, it operates at the normal frequency.

Generally, depending on the model of the smart card, the frequency at which the main control module operates normally is different. Therefore, the operation at low frequency refers to reducing the operating frequency of the main control module to a certain proportion of the normal operating frequency (for example, to The main control module is completely suspended for about 10% of the normal frequency, depending on the influence of other modules (such as Bluetooth module, NFC module, etc.) attached to the smart card on the peak current.

Example 1

In this embodiment, the smart card and the method and module for reducing the peak current are applied to the short-distance payment scenario. In order to complete the short-distance payment function, the smart card includes the Bluetooth module and the main control module, and further includes a short-range communication module. In this embodiment, the Bluetooth smart card is a Bluetooth SIM card, and the main control module is a SIM card main control module.

FIG. 1 is a schematic structural diagram of a Bluetooth SIM card according to Embodiment 1 of the present invention. As shown in FIG. 1 , the Bluetooth SIM card includes: a Bluetooth module 1, a Bluetooth antenna 2, a short-range communication antenna 3, a coil 4, and a short-range communication module. 5 and the main control module 7.

The main control module 7 includes a security processor, which can be used to store some telecommunication and payment security information, and is used to coordinate the cooperation of other modules.

The Bluetooth module 1 includes a radio frequency on unit and a radio frequency off unit, which can generate an interrupt signal on its IRQ pin 6 at a certain time before the radio frequency signal rises, thereby notifying the main control module 7 to reduce the frequency operation; after the radio frequency is turned off, the bluetooth module 1 will also generate an interrupt signal on the IRQ pin 6, in order to inform the main control module 7 to resume the frequency operation; the Bluetooth module 1 can be a low-power Bluetooth module, a traditional Bluetooth module, or a combination of two modules.

The main control module includes: a down-conversion operation unit and a recovery operation unit; the down-conversion operation unit is configured to operate at a low frequency after receiving the radio-frequency on-off interrupt; and the recovery operation unit is configured to receive the radio-frequency shutdown interrupt After that, run at normal frequency.

The main control module 7 performs data communication with the mobile phone application (APP) through the Bluetooth function of the Bluetooth module 1; the Bluetooth module 1 can include a common 2.4 GHz radio frequency communication function for data communication of the (Range Controlled Communication, RCC) technology.

The short-range communication module 5 may be an RCC technology short-range communication module or an NFC technology communication module. When the module is an RCC technology short-range communication module, the module includes a low-frequency magnetic signal demodulation processing unit and a 2.4 GHz radio frequency communication unit, while the coil 4 in FIG. 1 is a low-frequency magnetic signal coupling coil; when the module is In the case of the NFC communication module, the module is a 13.56 MHz frequency data communication module, while the coil 4 in Fig. 1 is a 13.56 MHz frequency coupling coil.

FIG. 2 is a schematic flow chart of the method for reducing peak current provided by the present invention in the embodiment. As shown in FIG. 2, the method for reducing peak current includes:

For the main program of the Bluetooth module, do the following:

Step 31, the system is initialized;

Step 32: Turn on the Bluetooth module.

Step 33: Enter a main loop of the Bluetooth application; in this process, according to the running condition of the Bluetooth radio, generate a radio frequency on or radio off interrupt (IRQ interrupt), and receive the interrupt return information;

Step 34, turning off the Bluetooth module;

For the interrupt program of the main control module, perform the following operations:

Step 40, receiving the Bluetooth module IRQ interrupt;

Step 41, determining whether it is a down-frequency interruption;

Step 42, if the frequency reduction interrupt, reduce the frequency of the main control module, go to step 44;

Step 43, if the frequency is not interrupted, the main control module frequency is increased, and the process proceeds to step 44;

In step 44, the main control module sends an interrupt return to the Bluetooth module.

Figure 2 is a flow chart of the Bluetooth smart card master module and the Bluetooth module performing peak shifting. When the Bluetooth smart card turns on the Bluetooth function and enters the normal working main loop, the Bluetooth module may start the RF at any time. Therefore, if the main control module wants to downgrade the peak at the right time, the Bluetooth module must actively notify the main control module. Let the main control module generate an interrupt and perform corresponding processing. The interrupt can be either a pin interrupt or an interface interrupt (eg serial interrupt).

After entering the interrupt program, it is judged whether the radio is turned on or the radio is turned off, and then the corresponding processing is performed. If the radio frequency is turned on, the frequency reduction processing flow is executed, as shown in step 42 of FIG. 2; if it is the radio frequency shutdown interrupt, the up-conversion processing flow is executed, as shown in step 2 of FIG. 2, and the interrupt is returned after processing.

Each module of the communication system of this embodiment corresponds to the steps described in the foregoing embodiment of the communication method, and thus has the same advantageous effects. In addition, it should be understood that the implementation of the communication system described above is merely illustrative, and the division of the described modules is only a logical function division, and may be further divided in actual implementation. In addition, the coupling or communication connection of the modules to each other may be through some interfaces, or may be electrical or other forms.

Each of the above functional modules may be part of a communication system, and may or may not be a physical frame. It may be located in one place or on multiple network units, and may be implemented in the form of hardware or a software function box. The form is implemented. Some or all of the modules may be selected according to actual needs to achieve the objectives of the solution of the present invention.

Those skilled in the art will appreciate that embodiments of the present invention can be provided as a method, system, or computer program product. Accordingly, the present invention may employ hardware embodiments, software embodiments, or a combination of software and A form of embodiment of the hardware aspect. Moreover, the invention can take the form of a computer program product embodied on one or more computer-usable storage media (including but not limited to disk storage and optical storage, etc.) including computer usable program code.

The present invention has been described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (system), and computer program products according to embodiments of the invention. It will be understood that each flow and/or block of the flowchart illustrations and/or FIG. 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 device to produce a machine for the execution of instructions for execution by a processor of a computer or other programmable data processing device. Means for implementing the functions specified in one or more of the flow or in a block or blocks of the flow chart.

The computer program instructions can also be stored in a computer readable memory that can direct a computer or other programmable data processing device to operate in a particular manner, such that the instructions stored in the computer readable memory produce an article of manufacture comprising the instruction device. The apparatus implements the functions specified in one or more blocks of a flow or a flow and/or block diagram of the flowchart.

These computer program instructions can also be loaded onto a computer or other programmable data processing device such that a series of operational steps are performed on a computer or other programmable device to produce computer-implemented processing for execution on a computer or other programmable device. The instructions provide steps for implementing the functions specified in one or more of the flow or in a block or blocks of a flow diagram.

It is to be noted that the above description is only an embodiment of the present invention, and thus does not limit the scope of the invention, and the equivalent structure or equivalent flow transformation using the description of the present invention and the drawings, for example, the technology between the embodiments The combination of features, or directly or indirectly, in other related technical fields, is equally included in the scope of patent protection of the present invention.

Claims

A smart card includes a Bluetooth module and a main control module, wherein the Bluetooth module includes: a radio frequency turn-on unit and a radio frequency turn-off unit;

The radio frequency on unit is configured to notify the main control module to reduce the frequency operation in an interrupted manner before the radio frequency signal is turned on;

The radio frequency shutdown unit is configured to notify the main control module to resume normal frequency operation in an interrupted manner after the radio frequency signal is turned off.
The smart card according to claim 1, wherein the main control module comprises: a frequency down operation unit and a recovery operation unit;

The down-conversion operation unit is configured to operate at a low frequency after receiving an RF-on interrupt;

The recovery operation unit is configured to operate at a normal frequency after receiving the radio frequency shutdown interrupt.
The smart card of claim 1 further comprising a short range communication module; said short range communication module being for short range communication of said smart card.
The smart card according to claim 3, wherein the short-range communication module is an RCC (Range Controlled Communication) technology short-range communication module.
The smart card according to claim 3, wherein the short-range communication module is an NFC (Near Field Communication) technology communication module.
A method for reducing peak current according to any of the smart cards of any of claims 1-5, characterized in that Including steps:

A. The Bluetooth module notifies the main control module to reduce the frequency operation in an interrupted manner before the RF signal is turned on;

B. After the radio frequency signal is turned off, the Bluetooth module notifies the main control module to resume normal frequency operation in an interrupted manner;

C. The main control module runs at a low frequency after receiving the radio frequency on interruption;

D. The main control module runs at a normal frequency after receiving the radio frequency shutdown interrupt.
The method of claim 6 wherein prior to step A, the step of: turning on the Bluetooth module.
The method according to claim 6, wherein before step C or step D, the method further comprises the step of: determining whether the radio frequency turn-on is interrupted.
The method according to claim 6, further comprising the step of: receiving, by the Bluetooth module, interrupt return information sent by the main control module.