KR200389194Y1 - Smart Chip Module Capable of Controlling Contactless Function Mounted in Cellular Phone - Google Patents

Abstract

According to the present invention. A contact / non-contact smart chip module 1 for mounting a mobile communication terminal electrically connected to the CPU 11 of the mobile communication terminal 10 and the loop antenna 20 of the battery 12 to perform a non-contact function is provided. The smart chip module 1 according to the present invention is electrically connected to the mobile communication terminal 10 by contact terminals 2A and connected to the loop antenna 20 by a non-contact terminal 2B to contact and Contact / contactless smart chip (2) that is activated by contactless; Non-contact of the contact / contactless smart chip 2 that is electrically connected to the CPU 11 of the mobile communication terminal 10 and the contact / contactless smart chip 2 and transmitted by the CPU 11 through mobile communication. A microprocessor (3: MPU) for receiving, storing and processing a function control signal (usable signal or unavailable signal); And the contact / contactless smart chip (2) electrically connected between the contact / contactless smart chip (2), the microprocessor (3) and the loop antenna (20) according to the control signal from the microprocessor (3). And a non-contact function use state holding circuit 4 for holding the non-contact function of 2) in an available state or in an unusable state. The operation of the holding circuit 4 by the microprocessor 3 includes: The non-contact function of the contact / non-contact smart chip 2 by the holding circuit 4 is executed by the minimum residual current of the communication terminal battery 12 so that the mobile communication terminal 10 is powered off. maintain.

Description

Smart Chip Module Capable of Controlling Contactless Function Mounted in Cellular Phone}

(Technology)

The present invention relates to a smart chip module capable of controlling a non-contact function for mounting a mobile communication terminal, and more particularly, is a smart chip module mounted on a mobile communication terminal (eg, a mobile phone) and having a non-contact function such as a traffic card function. The present invention relates to a smart chip module that can control whether or not the non-contact function is available even when the terminal is powered off.

(Background)

A smart chip (card) is an IC chip equipped with a microprocessor, an operating system, a security module, a memory, etc., and has a storage function, arithmetic function, and security function, and has information in many fields such as finance, communication, education, administration, and transportation. It is widely used as a means of record, loyalty management, identity verification, electronic money (eg transportation card), credit card, electronic bank account.

Smart chips (cards) can be classified into various categories according to their classification criteria, and may be classified into contact-chip (card), contactless-chip (card), and combined-chip (card) according to the way data is read. .

The contact smart chip refers to a form in which the smart chip is activated by contacting the contact point of the interface device. The contactless smart chip has the same operation type as the contact type but the RF for communication with the interface device. (Radio Frequency) It refers to a form in which electromagnetic induction of loop antenna is used, and the combined smart chip supports both contact and non-contact functions, and the representative combination chip has a portion where contact / contactlessness can be shared on one chip. It is a smart chip configured to share with each other.

Smart chips are widely used as transportation cards, one of prepaid electronic money. The prepaid transportation card is a plastic card type non-contact card with a contactless smart chip and RF loop antenna.The card is charged at the charging station in advance and charged to the card. It is a smart card of the way that the transportation fee is reduced from the stored amount, there is a inconvenience to visit the charging station to recharge the amount.

Some contactless transportation cards are combined with credit cards so that they can be postpaid with credit, just like regular commodity payments, without recharging the fare. These combined credit cards combine a contactless smart chip with an RF loop antenna in the plastic card of the credit card. It can be said.

As mobile communication terminals (e.g. mobile phones) and smart chips are being used more and more, and mobile communication terminals are becoming a necessity, smart chips are installed in mobile phones rather than traditional plastic cards such as transportation cards and credit cards. It is provided in the form.

Examples of mounting a smart chip on a mobile communication terminal include a mobile phone equipped with a non-contact smart chip and an RF loop antenna to make a prepaid payment (traffic fee); Combi-chip equipped with both contact and non-contact type is mounted on the mobile phone, and the contact-chip is equipped with an electronic bankbook function for account inquiry, transfer, withdrawal and check inquiry through mobile communication, and prepaid for non-contact chip. A mobile phone equipped with a traffic card function; There is a mobile phone equipped with a credit card function on a contact chip and a traffic card function on a non-contact chip to postpaid the transportation fee by a credit card instead of charging.

CombiChip, a representative contact / contactless smart chip widely used in mobile phones, is equipped with a contact interface for contact function, a contactless interface for contactless function, and an applet for controlling related functions. 6 terminals (C1: power supply terminal (VCC), C2: initialization input terminal (RST), C3: clock terminal (CLK), C5: ground terminal (GND), C6: program voltage terminal (not currently used) , C7: serial data input / output terminals (I / O) are electrically connected to the CPU (Qualcomm chip) of the mobile phone to act as a contact with the CPU of the mobile phone and the remaining two terminals (antenna terminals C4 and C8 (ANT) )) Is connected to the loop antenna mounted on the battery of the mobile phone and works non-contact with the external interface.

The contactless function of the smart chip, such as a traffic card function, is executed through contactless communication with an RF reader such as a traffic toll collector, and thus there is a problem that the contactless function service company cannot control whether or not it can be used.

For example, in the case of a mobile phone to which a smart card with a traffic card function is applied, the traffic card function of a specific mobile phone may be temporarily or permanently (non-contact function), such as a charge delay, loss of the mobile phone, or suspension of the user's own use of the traffic card function. May need to be stopped or resumed (i.e. need to manage blacklists), and traditionally, the management of such blacklists periodically sends blacklisted data to each toll collector (RF reader). Has been used.

However, the method of transmitting the blacklist to the toll collector requires a large amount of storage capacity for storing the blacklist data for each toll collector, and there is a limitation that a time difference may occur until a new blacklist is updated to the toll collector.

In order to overcome this problem, the RF of a smart chip mounted by transmitting a control signal for switching a non-contact function (e.g., a traffic card function) to an available state or an unavailable state to a mobile communication terminal (mobile phone) through mobile communication. By selectively opening and closing the loop antenna line, a technology for controlling the non-contact function of the smart chip by mobile communication is disclosed in Korean Patent No. 390280 (Payment control device and control method of a mobile communication terminal equipped with a smart chip: June 26, 2003) Registration).

However, the conventional blacklist management for controlling the smart chip non-contact function through the mobile communication network of the mobile communication terminal does not work in a situation where power is not supplied to the mobile communication terminal.

That is, the conventional non-contact control of the smart chip functions only when the power is supplied to the mobile communication terminal and the CPU (Qualcomm chip) of the mobile communication terminal is operating, but the non-contact function of the smart chip is supplied to the mobile communication terminal. Even in the absence of a state (battery discharge or power off of the mobile communication terminal), the contactless function can be realized by supplying the necessary power by RF electromagnetic induction of the external RF reader.

Thus, for example, in the case of a mobile communication terminal equipped with a smart chip with a traffic card function, it is possible to settle a traffic charge even when the battery is discharged or powered off, but the CPU of the mobile communication terminal does not work. Even in the unusable state (black list state), there is a problem in that it is possible to pay the traffic fare, and thus users who have limited use of the traffic fare payment can turn off the power of the mobile communication terminal. If you pay a fee, it will be difficult to prevent it.

An object of the present invention is to provide a smart chip module mounted on a mobile communication terminal to execute a non-contact function to control whether the non-contact function can be used through mobile communication.

An object of the present invention is a smart chip module mounted on a mobile communication terminal to execute a non-contact function such as a traffic card function, and can control whether the non-contact function can be used even when no power is supplied to the mobile communication terminal. It is to provide a smart chip module.

According to the present invention, there is provided a contact / contactless smart chip module for mounting a mobile communication terminal that is electrically connected to a loop antenna of a CPU and a battery of a mobile communication terminal to execute a contactless function.

Smart chip module according to the present invention, the contact / non-contact smart chip is electrically connected to the mobile communication terminal by the contact terminal and is connected to the loop antenna by a non-contact terminal is activated in contact and non-contact; It is electrically connected to the CPU of the mobile communication terminal and the contact / contactless smart chip to receive the non-contact function control signal (available signal or unavailable signal) of the contact / contactless smart chip transmitted by the CPU through mobile communication. A microprocessor (3: MPU) for storing and processing; And electrically connected between the contact / contactless smart chip, the microprocessor and the loop antenna to maintain the contactless function of the contact / contactless smart chip in a usable state or in an unusable state according to the control signal from the microprocessor. And a non-contact function use state maintaining circuit.

In the smart chip module according to the present invention, the operation of the holding circuit by the microprocessor is performed by the minimum residual current of the battery of the mobile communication terminal, so that the non-contact function of the contact / non-contact smart chip by the holding circuit is achieved. Control is maintained even in the power off state of the mobile communication terminal.

Preferably, the holding circuit is an opening / closing circuit which can switch and maintain the non-contact function of the contact / non-contact smart chip to an available state or an unusable state by opening and closing an electrical connection between the contact / non-contact smart chip and the loop antenna. Alternatively, the short circuit may be configured to short-circuit one of the contact / contactless smart chip and the loop antenna so that the contact / contactless smart chip may be switched to an available state or an unusable state.

Hereinafter, with reference to the accompanying drawings will be described in detail the smart chip module according to the present invention. The following specific examples are merely illustrative of the smart chip module according to the present invention is not intended to limit the scope of the present invention.

1 is a conceptual block diagram of a mobile communication terminal equipped with a smart chip module in the present invention, FIG. 2 is a block diagram of an exemplary smart chip module according to the present invention, and FIG. 3 is a mobile communication terminal to which the smart chip module of the present invention is applied. 4 is a flowchart of a process of maintaining the non-contact function control signal when the battery which has been removed is remounted to the mobile communication terminal.

1 and 2, the smart chip module 1 according to the present invention, the contact / contactless smart chip 2, the microprocessor (3: MPU) and the non-contact function using state maintaining circuit (4) And mounted (eg, mounted or removable) on a mobile communication terminal (eg, a mobile phone).

The contact / non-contact smart chip 2 of the smart chip module 1, for example, contacts the contact terminals (2A: VCC, RST, CLK, I / O, GND) according to ISO-7816, the smart card international standard. It is connected to the CPU 11 of the mobile phone 10 through, the loop antenna 20 is connected to the two non-contact terminals (2B: ANT). The loop antenna 20 is mounted on the battery 12 of the cellular phone 10.

Accordingly, the non-contact control signal of the contact / contactless smart chip 2 received by the mobile phone 10 through mobile communication is transmitted to the smart chip module 1 through the ISO-7816 channel.

As the contact / contactless smart chip 2 constituting the smart chip module 1, for example, a combination chip may be used. Like the combination chip equipped with a general mobile phone, the contact / contactless smart chip 2 may also have contact terminals. It is electrically connected to the CPU 11 of the mobile communication terminal 10 by 2A and is connected to the loop antenna 20 by the non-contact terminal 2B to be activated in contact and non-contact.

As the microprocessor 3 of the smart chip module 1, a microprocessor (for example, a 4-bit MPU) that includes a control circuit that decodes an instruction and executes arithmetic and control operations can be used. A memory 3A (e.g., EEPROM) is provided to store an available signal or an unavailable signal.

The MPU 3 is electrically connected to the CPU 11 of the mobile communication terminal 10 and the contact / contactless smart chip 2, and the contact / contactless smart chip 2 received by the CPU 11 through mobile communication. A process for storing the non-contact function control signal and controlling whether or not the non-contact function is available is performed.

The non-contact function use state maintaining circuit 4 included in the smart chip module 1 is electrically connected between the contact / non-contact smart chip 2, the loop antenna 20, and the MPU 3, and the MPU 3 The non-contact function of the contact / non-contact smart chip 2 is maintained in an available state or in an unusable state in accordance with the control signal.

The holding circuit 4 is not particularly limited as long as it is a circuit capable of switching and holding the non-contact function of the contact / non-contact smart chip 2 by the command of the MPU 3 to an available state or an unusable state.

As an example of the holding circuit 4, the non-contact function of the contact / non-contact smart chip 2 is switched to an enabled state or an unusable state by opening and closing an electrical connection between the contact / contactless smart chip 2 and the loop antenna 20. Maintainable switching circuit, or by selectively shorting one of the contact / contactless smart chip 2 and the loop antenna 20, the contact / contactless smart chip 2 can be switched to an available state or an unusable state. A short circuit can be used, and as such circuits, circuits well known in the related art can be applied to the present invention.

According to the smart chip module 1 of the present invention, a management company in charge of managing the black list (B / L) of a non-contact function (eg, a transportation card function) of the smart module 1, such as a mobile communication company, is specified. If you want to control the non-contact use by the smart chip module 1 of the mobile communication terminal 1, for example, after the user of the mobile phone 10 pays traffic charges using the smart chip module (1) If it is necessary to stop the transportation fee payment function without paying the fee, the user can report the loss of the mobile phone 10 and make an illegal traffic fee payment using the smart chip module 1 by the acquirer. When it is necessary to shut off the contactless function of the smart chip module 1 temporarily or permanently, such as when it is necessary to cut off or when the user cancels the use of the contactless function of the smart chip module 1, And if you want to restore the contactless function that has been suspended, the management company transmits a control signal (available signal or unavailable signal) to the mobile phone 10 through the mobile communication.

The CPU 11 of the mobile phone 10 having received the control signal through mobile communication sends the control signal to the MPU 3 of the smart chip module 1 through the contact terminal of ISO-7816 standard, and the MPU 3 ) Analyzes and stores the corresponding control signal, and if the control signal is a usable signal, the holding circuit 4 electrically connects the contact / contactless smart chip 2 and the loop antenna 20, or the contact / contactless smart chip. (2) Alternatively, the loop antenna 20 is switched and maintained in a state where the non-contact function can be used without short-circuit, and if the control signal is an unusable signal, the holding circuit 4 loops with the contact / non-contact smart chip 2. The antenna 20 is electrically blocked or the contact / contactless smart chip 2 or the loop antenna 20 is shorted to switch and maintain the noncontact function in an unusable state.

According to a feature of the present invention, the control operation of the holding circuit 4 by the MPU 3 of the smart chip module 1 is executed using the minimum residual current of the mobile communication terminal battery 12.

In general, even if the battery 12 of the mobile communication terminal is completely discharged, the minimum residual current is maintained for the protection of the battery, etc. In the present invention, the contact / non-contact smart by the MPU 3 and the holding circuit 4 The non-contact function control of the chip 2 is executed by using the minimum remaining current of the battery 12 even when the battery 12 is discharged or the mobile communication terminal 10 is turned off. Thus, the battery 12 is discharged. The blacklist can be managed even when the user intentionally turns off the mobile communication terminal.

Hereinafter, referring to FIG. 3, a process of setting a state of using a non-contact function in a smart chip module in a mobile communication terminal to which the smart chip module of the present invention is applied will be described. This process is executed in a situation where power is normally supplied to the mobile communication terminal.

First, the MPU 3 is in a standby mode (SLEEP mode) to minimize the power consumption in a normal situation that does not perform the control operation (S10).

When a new control signal is transmitted from the management company and the CPU 11 of the cellular phone 10 receives the control signal and sends it to the MPU 3 of the smart chip module 1, the connection terminal VCC is activated. The MPU 3 is switched from the standby mode to the active mode (S20).

From the moment the MPU 3 is activated, the timer is set to operate the MPU 3 from the active mode to the standby mode (S30).

Then, it is determined whether the time set in the timer has elapsed (S40). If the set time has not elapsed (NO), it is determined whether the control signal from the CPU 11 can be interpreted as a non-contact function control signal (S50). If interpreted as a control signal (YES), then the non-contact function control signal is set and maintained.

The setting and maintenance of the non-contact control signal are, for example, judging whether the control signal (B / L flag) is 1 or 0 (S60), and if it is 1, it is set high and the holding circuit 4 is cut off or short-circuited. To keep the contact / non-contact smart chip 2 unable to perform the non-contact function (S70). If the control signal (B / L flag) is 0, it is set to LOW so that the holding circuit 4 The contact / non-contact smart chip 2 is maintained in a connected state or not shorted to perform a non-contact function (S80).

When the setting of the control signal is finished and the time set in the timer has elapsed, the MPU 3 is switched to the standby mode (S90).

In this situation, when the mobile communication terminal 10, i.e., the smart chip module 1, is in close proximity to the RF reader and attempts to execute a non-contact function (e.g., traffic fare payment), the control state set in the holding circuit 4 (available for use). State or unusable state), the contactless function of the contact / contactless smart chip (2) is enabled or disabled.

At this time, since the MPU 3 of the smart chip module 1 according to the present invention is operated by the minimum residual current of the battery 12 of the mobile communication terminal 10, power is normally supplied to the mobile communication terminal 10. The non-contact function control of the contact / contactless smart chip 2 by the MPU 3 is maintained as it is, of course, even when the battery is discharged or the mobile communication terminal is turned off.

Referring to FIG. 4, a process of maintaining the non-contact function control signal when the battery, which has been removed, is reattached to the mobile communication terminal will be described.

When the battery 12 that has been removed is reattached to the mobile phone 10 (S101), the MPU 3 is activated (S102), and the control signal (B / L flag) stored in the memory 3A is read out to control the signal. It is determined whether the (B / L flag) is 1 or 0 (S103).

If the control signal is 1, the signal is set to high so that the holding circuit 4 is in a cut-off state or a short-circuit state so that the contact / non-contact smart chip 2 cannot perform the non-contact function (S104). If (B / L flag) is 0, it is set as LOW so that the holding circuit 4 is in a connected state or unshorted state so that the contact / non-contact smart chip 2 can perform the non-contact function. (S105) When the maintenance of the control signal is completed, the MPU 3 is switched to the standby mode (S106).

As a result, even when the battery 12 is removed from the mobile communication terminal 10 and the non-contact function control state set in the holding circuit 4 is eliminated, the moment of mounting the battery again (the mobile communication terminal to which the present invention is applied) Since the loop antenna is installed in the battery, the contactless function cannot be used by default when the battery is removed from the mobile communication terminal.) The minimum remaining capacity of the battery 12 regardless of whether the mobile communication terminal 1 is turned on. By the current, the MPU 3 and the holding circuit 4 operate to maintain the control state (usable state or unusable state) of the non-contact function previously set.

Therefore, even when the user removes the battery 12 from the mobile communication terminal 10 to extinguish the non-contact function unusable state set in the holding circuit 4 and uses the non-contact function unfairly, the non-contact stored in the battery is installed. The function disable control state is executed, which makes it possible to block the use of an illegitimate contactless function.

Although the mobile phone is illustrated as a mobile communication terminal in describing the present invention, it is obvious that the smart chip module of the present invention can be applied to other mobile communication terminals including a PDA and the like.

According to the smart chip module mounted on the mobile communication terminal according to the present invention described above, the non-contact function can be used even when power is not supplied to the mobile communication terminal in controlling the non-contact function of the smart chip module through the mobile communication. There is an effect to control whether or not.

1 is a conceptual block diagram of a mobile communication terminal equipped with a smart chip module in the present invention,

2 is a block diagram of an exemplary smart chip module according to the present invention;

3 is a flowchart of a process of setting a non-contact function control signal by a mobile communication terminal to which a smart chip module of the present invention is applied;

4 is a flowchart of a process of maintaining a non-contact function control signal when the battery, which has been removed, is remounted in the mobile communication terminal.

<Explanation of symbols for the main parts of the drawings>

1: smart chip module 2: contact / contactless smart chip

2A: Contact terminal 2B: Antenna terminal

3: microprocessor (MPU) 3A: memory

4: maintenance circuit 10: mobile communication terminal (mobile phone)

11: CPU 12: battery

20: loop antenna

Claims (3)

In the contact / non-contact smart chip module 1 for mounting a mobile communication terminal electrically connected to the CPU 11 of the mobile communication terminal 10 and the loop antenna 20 of the battery 12 to perform a non-contact function, A contact / non-contact smart chip 2 electrically connected to the mobile communication terminal 10 by contact terminals 2A and connected to the loop antenna 20 by a non-contact terminal 2B and activated in contact and non-contact. ; Non-contact of the contact / contactless smart chip 2 that is electrically connected to the CPU 11 of the mobile communication terminal 10 and the contact / contactless smart chip 2 and transmitted by the CPU 11 through mobile communication. A microprocessor (3: MPU) for receiving, storing and processing a function control signal (usable signal or unavailable signal); And the contact / contactless smart chip (2) electrically connected between the contact / contactless smart chip (2), the microprocessor (3) and the loop antenna (20) according to the control signal from the microprocessor (3). And a non-contact function use state maintaining circuit (4) for maintaining the non-contact function of 2) in an enabled state or in an unusable state. The operation of the holding circuit 4 by the microprocessor 3 is performed by the minimum residual current of the mobile communication terminal battery 12, so that the contact / contactless smart chip by the holding circuit 4 The control of the non-contact function of 2) is maintained even in the power-off state of the mobile communication terminal 10, Smart chip module capable of controlling the non-contact function for mounting a mobile communication terminal. The non-contact function of the contact / contactless smart chip (2) according to claim 1, wherein the holding circuit (4) opens and closes the electrical connection between the contact / contactless smart chip (2) and the loop antenna (20). Smart chip module controllable non-contact function for mounting a mobile communication terminal, characterized in that the switching circuit that can be maintained by switching to a state or unavailable state. 2. The holding circuit (4) according to claim 1, wherein the holding circuit (4) selectively shorts one of the contact / contactless smart chip (2) and the loop antenna (20) to use the contact / contactless smart chip (2). A non-contact controllable smart chip module for mounting a mobile communication terminal, characterized in that it is a short circuit that can be maintained by switching to an unusable state.