WO2009140806A1

WO2009140806A1 - Read-write converting device of radio frequency smart card

Info

Publication number: WO2009140806A1
Application number: PCT/CN2008/001774
Authority: WO
Inventors: 梁建华
Original assignee: 深圳市中兴集成电路设计有限责任公司
Priority date: 2008-05-20
Filing date: 2008-10-21
Publication date: 2009-11-26
Also published as: CN101329739A; CN101329739B

Abstract

A read-write converting device (10) of radio frequency smart card includes a radio frequency chain (11), a radio frequency antenna (12), a radio frequency transceiver unit (13), a management and control unit MCU (14) and a host computer communication interface (15). Especially, said MCU (14) provides a specific software interface to said host computer (23) by the program that runs inside the MCU. Through said interface, the host computer (23) doesn't need to discriminate the work frequency of the radio frequency smart card, unifiedly regards it as a radio frequency smart card working at 13.56MHz and reads and writes the radio frequency smart card (21) working at other frequency according to the access mode of the Mifare card working at 13.56MHz. Said read-write converter has good compatibility, and the host computer specially designed for Mifare card needs only to be slightly modified to exchange data with the radio frequency smart card that works at high frequency band (such as UHF band).

Description

Radio frequency smart card reading and writing conversion device

Technical field

The present invention relates to a method or apparatus for reading a record carrier, and more particularly to a device for reading a record carrier using an electromagnetic field change, and more particularly to a read/write conversion device for a radio frequency smart card. Background technique

In normal life, there are many occasions where card swipe operations are required, such as access control, public transportation, small cash payments for meals, etc. The traditional method is to hold one to several RF cards per person for different applications. .

With the advancement and development of technology, mobile phones have become more and more popular. Especially in the city, basically, each person can have a mobile phone (hereinafter referred to as "mobile phone"). Therefore, using mobile phones The "swipe" of the trick, so that people do not need to carry too many cards, naturally become a trend. One solution is to modify the SM (Subscriber Identity Model) card in the mobile phone to have the function of the radio frequency. It can realize the function of the RF card working in the 13.56 MHz band, but it works at the frequency of 13.56 MHz. Due to the shielding of the mobile phone and the area of the SIM card, the RF smart card has a small communication range, and it is necessary to use a radio frequency smart card working in a higher frequency band (such as UHF frequency) to solve this problem, considering the current The RF card working in the 13.56MHz frequency band, that is, the Mifare card has become the standard of fact, and is widely used in various occasions. The corresponding P0S machine, access control management system and other design processes are basically designed according to the characteristics of the Mifare card. In order to make the mobile phone swipe mode easier to promote, and also to reduce the complexity of technical transformation and save resources such as manpower and resources, the best way is to modify the card reader to work in higher frequency bands (such as UHF band), while being able to read the RF smart card on the mobile phone In addition, the host computer provides a protocol that is basically the same as the Mifare card. In this way, the software of the host computer can be directly applied to the occasion of the mobile phone swiping without any modification or with very few modifications. Obviously, this If the card reader is not modified, the host computer designed for the characteristics of the Mifare card cannot communicate with the RF smart card working in the high frequency band. Therefore, in order to ensure the normal communication between the host computer and the RF smart card working in the high frequency band, At this point, it is necessary to make major modifications to the host computer and the software that works in it> causing great inconvenience to the application.

The above prior art card reading device has the following disadvantages:

1. The RF smart card working at 13.56MHz frequency has a small communication range due to the shielding of the mobile phone casing and the influence of the SIM card area;

2. Using the original smart card reader/writer, the host computer designed for the Mifare card features cannot work with In the high-frequency RF smart card normal communication, it is necessary to make major modifications to the host computer and the software working in it, which brings great inconvenience to the application. Summary of the invention

The technical problem to be solved by the present invention is to avoid the above-mentioned deficiencies of the prior art and to provide a radio frequency smart card read/write conversion device, which is suitable for reading a radio frequency smart card working in a high frequency band (such as a UHF band), in addition to being capable of In addition to providing an access interface to the host computer in a specific format, it is also possible to provide an access interface to the upper computer in a manner consistent with the card reader protocol of the currently widely used Mifare card through corresponding data processing.

The technical problem of the present invention can be achieved by adopting the following technical solutions: a radio frequency smart card read/write conversion device, including a radio frequency interface, a radio frequency antenna, a radio frequency transceiver module, a management control module MCU-, and a host computer communication interface, the radio frequency The transceiver module and the management control module MCU exchange data through the bus; the radio frequency smart card completes data exchange through the radio frequency interface and the read/write conversion device; the upper computer completes data exchange through the upper computer communication interface and the read/write conversion device; in particular, the The management control module MCU provides a dedicated software interface for the upper computer through a program running therein, and the dedicated software interface is a virtual Mifare interface between the program running in the management control module MCU and the upper computer software, and the virtual interface is utilized. an interface, the host computer need not distinguish between the working band RF smart cards, which are regarded as the work and the RF smart card 13. ⁵⁶ Mhz, in accordance with the working mode access Mifare card reader 13. 56MHz RF frequency to work in other frequency bands smart card.

The program running in the MCU of the management control module can open or close the dedicated software interface for communication with the host computer according to the instruction of the host computer.

The management control module MCU and the upper computer are interconnected through a host computer communication interface, and the upper computer communication interface includes

UART, RS232, RS485, USB and Ethernet interfaces.

The working frequency bands of the radio frequency smart card include UHF band, 2. 4G band and 5. 8G band.

The radio frequency antenna and the radio frequency smart card work in the same frequency band; the radio frequency transceiver module and the radio frequency smart card also work in the same frequency band.

The management control module MCU achieves the purpose of controlling the communication between the RF transceiver module and the RF smart card through the operation of the registers in the RF transceiver module, and completes the process of reading the contents of the RF smart card.

The radio frequency transceiver module (13) and the control and management control module MCU U ⁴ are interconnected by an SPI interface, a UART or a / ² C interface.

The software running on the host computer needs to be modified according to whether the dedicated software interface on the management control module MCU is open. When the dedicated software interface is opened, the read/write conversion device can support a series of commands related to Mifare, and the read/write conversion device itself and the radio frequency smart card perform corresponding coordination processing, and convert the command of the upper computer into the corresponding corresponding to the radio frequency smart card.搡, Let the host computer think that it is operating on a Mifare card working at 13.56Mhz.

The present invention solves the technical problem, and can further be implemented by using the following technical solutions. A radio frequency smart card read/write conversion method, based on the above-mentioned radio frequency smart card read/write conversion device, includes the following steps:

A. The read/write conversion device receives a command sent by the host computer;

B. The read/write conversion device determines whether the operation is a card operation command or a device operation command, and if the command is a device operation command, the read/write conversion device is operated according to the operation command;

C. In step B, if it is determined that the card is a command, the read/write conversion device sends the command to the radio frequency smart card;

D. The RF smart card performs corresponding operations, and returns the result of the operation to the read/write conversion device;

E. The read/write conversion device returns the result to the upper computer to complete a data exchange process. Compared with the prior art, the beneficial effects of the present invention are:

1. The read/write conversion device can communicate with a radio frequency smart card operating in a high frequency band (such as a UHF band), thereby expanding the range of communication;

2. The read/write conversion device has good compatibility. The host computer system specially designed for the Mifare card can exchange data with the RF smart card working in the high frequency band (such as the UHF band) with little modification. It reduces the technical difficulty of the promotion of the new system, and at the same time maximizes the use of existing mature, long-term practice-tested systems, thereby avoiding waste of resources such as technology, manpower and resources;

1 is a logic block diagram of a radio frequency smart card read/write conversion device of the present invention;

2 is a block diagram showing the working principle of the radio frequency smart card reading and writing conversion device of the present invention;

3 is a flow chart showing the operation control of the read/write conversion method of the present invention. detailed description

The following is further described in detail in conjunction with the preferred embodiment shown in the drawings. 8 001774 A radio frequency smart card read/write conversion device 10 of the present invention, as shown in FIG. 1 , includes a radio frequency interface 11 , a radio frequency antenna Π, a radio frequency transceiver module ¹³ , a management control module MCU 14 , and a host computer communication interface 15 , the radio frequency The transceiver module 13 and the management control module MCU14 exchange data through the bus; the radio frequency smart card completes data exchange with the read/write conversion device 10 through the radio frequency interface 11; the upper computer 23 completes data exchange with the read/write conversion device 10 through the upper computer communication interface 15 In particular, the management control module MCU14 provides a dedicated software interface for the host computer 23 through a program running therein, the dedicated software interface being between the program running in the management control module MCU14 and the software of the host computer 23. The virtual Mifare interface, using the virtual interface, the upper computer 23 does not need to distinguish the working frequency band of the radio frequency smart card, and it is unified as a radio smart card working at 13.56Mh _Z , according to the way of accessing the Mifare card working at 13.56MHz frequency To read and write the RF smart card 21 working in other frequency bands.

As shown in Fig. 1 or 2, the program running in the management control module MCU 14 can turn on or off the dedicated software interface for communication with the host computer 23 in accordance with the instruction of the host computer 23.

As shown in FIG. 1, the management control module MCU14 and the host computer 23 are interconnected by a host computer communication interface 15, which includes a UART, RS232, RS485, USB, and Ethernet interfaces.

As shown in FIG. 2, the working frequency band of the radio frequency smart card 21 includes a UHF frequency band, a 2. 4G frequency band, and a 5. 8G frequency band; the radio frequency antenna 12 and the radio frequency smart card 21 operate in the same frequency band; the radio frequency wireless transceiver module 13 and the radio frequency The smart card 21 works well in the same frequency band.

As shown in FIG. 2, when the radio frequency smart card 21 works in a certain high frequency band, the radio frequency antenna I ² and the radio transceiver module 13 must also work in the same frequency band as the radio frequency smart card, so as to ensure the radio frequency smart card and the read and write. The normal communication of the conversion device 10, when the working frequency bands of the radio frequency smart card 21 are inconsistent, the transceiver antenna 12 and the wireless transceiver module 13 of the corresponding working frequency band need to be replaced. With the development of technology, some radio frequency antennas I ² can work in multiple frequency bands. The wireless transceiver module 13 can also operate in multiple frequency bands at the same time. Any simple replacement of the RF antenna 12 and the wireless transceiver module 13 is obvious and should be included in the protection scope of the present invention.

The management control module MCU14 controls the communication between the RF transceiver module 13 and the RF smart card 21 by operating the registers in the RF transceiver module, and completes the process of reading the contents of the RF smart card.

The radio frequency transceiver module I ³ and the control and management control module MCU1 ⁴ are interconnected through an SH interface, a UART or a / ² C interface.

The software running on the host computer 23 needs to be modified according to whether the dedicated software interface on the management control module MCU14 is turned on. When the dedicated software interface on the management control module MCU14 is turned on, the read/write device 10 is opened. The communication with the high frequency band RF smart card ² 1 can be performed in the original manner. At this time, the read/write conversion device 10 can support a series of Mifare related commands, and the read/write conversion device 10 itself and the RF smart card 21 can coordinate accordingly. Processing, the command of the host computer ²³ is converted into the corresponding operation of the radio frequency smart card 21, so that the host computer 23 considers that it is working on a Mifare card operating at 56 Mhz, without the need for the host computer 23 and the software running therein. Make changes or just make simple modifications but communicate normally.

Inside the RF smart card ² 1 , one or several logical encryption cards are virtualized. Logically, the data organization and definition of these virtual logical encryption cards are compatible with the mifare card, but in physical data organization. Not necessarily the same. When the read/write conversion interface device 10 operates in the Mifare mode, the virtual logical encryption cards in the radio frequency smart card 21 are accessed, and the read/write conversion interface device 10 receives the Mifare card sent by the host computer 23. Commands, such as password authentication, read block, write block, value added, depreciation, storage, transmission, etc., after the read/write switch device 10 receives these operation commands from the host computer 23, the corresponding key, data, etc. After the separation, according to the content of the command and the current state, through the RF transceiver module, perform a card search, open the card, set the access mode, key authentication, perform the corresponding operations, etc., complete the upper position on the virtual logical encryption card The machine requires the operation, and then returns the corresponding data to the host computer. During the execution of these operations, the communication between the read/write conversion device 10 and the radio frequency smart card 21 can be performed using a protocol defined by itself, the host computer 23 A command may be split and separated by the read/write conversion device 10, by one or more times with the RF smart card 21 The data communication is completed, so that the read/write conversion device 10 and the radio frequency smart card 21 can select the appropriate communication protocol according to the different frequency bands used, without affecting the design of the upper computer.

When the dedicated software interface on the management control module MCU 14 is turned off, the communication between the read/write device 10 and the high-band RF smart card 21 can be performed in the original manner, and the read/write conversion device 10 no longer supports the Mifare correlation. The series of commands, the read/write conversion device 10 cannot perform the corresponding coordination processing with the RF smart card ²¹ , nor can the command of the host computer 23 be converted into the corresponding operation of the RF smart card, so that the host computer 23 considers that it is working for one. The Mifare card of 13.56Mhz is operated. At this time, it is necessary to make major modifications to the host computer 23 and the software running therein to perform normal communication.

The present invention solves the technical problem described above. The following technical solutions can be further implemented. A method for converting a radio frequency smart card read/write conversion device is based on a radio frequency smart card read/write conversion device 10, including the steps of: Step 31 in FIG. As shown, the system is powered on;

A, as shown in step 32 of FIG. 3, the read/write conversion device 10 receives the command sent by the host computer ²³ ;

B. As shown in step 33 of FIG. 3, the read/write conversion device 10 determines whether the operation is a card operation command or a device operation. As a command, if the command is a device command, the read/write conversion device 10 is executed according to the command, as shown in step 34 of FIG. 3;

C, step B, as shown in step 35 of Figure 3, if it is determined to be a card operation command, the read/write conversion device 10 sends the command to the radio frequency smart card 21;

D, as shown in step 36 of Figure 3, the RF smart card 21 performs corresponding operations, and returns the operation result to the read/write conversion device 10;

E, 10 to read and write the result back to the host computer converting means 23, to complete a data exchange, the ^third step 37 shown in FIG.

The above-described implementation process is a preferred implementation process of the present invention, and the usual changes and substitutions made by those skilled in the art based on the present invention are included in the scope of the present invention.

Claims

Patent claim

1. A reading and writing conversion device (10) for a radio frequency smart card, comprising a radio frequency link (11), an RF antenna (12), a radio frequency transceiver module (13⁄4, a management control module MCU (14), and a host computer communication interface (15) The radio frequency transceiver module ( ) and the management control module MCU ( 14 ) exchange data through the bus; the radio frequency smart card ( 21 ) completes data exchange through the radio frequency link ( 11 ) and the radio frequency smart card read/write conversion device ( 10 ); The machine (23) completes data exchange with the read/write conversion device (10) through the upper computer communication interface (15); and is characterized in that: the management control module MCU (14) is the upper computer through a program running therein ( 23) providing a dedicated software interface, the dedicated software interface is a virtual Mif are interface between the program running in the management control module MCU (14) and the upper computer (23) software, by using the virtual interface, the upper computer (23) no need to distinguish between work-band RF smart card, and it will work in unity seen as 13.56¾¾ RF smart card _2, in accordance with access to work in the way Mifare card read and write 13.56MHz frequency to work in other Segment RF smart card (21).

2. The read/write conversion device for the radio frequency radio smart card according to claim 1, wherein the feature is:

The program running in the management control module MCU (14) can open or close the dedicated software interface for communication with the host computer (23) according to the instruction of the host computer (23).

3. The read/write conversion device for the radio frequency smart card according to claim 1, wherein the feature is:

The management control module MCU (14) and the upper computer (23) are interconnected by a host computer communication interface (15), which includes a UART, RS232, RS485, USB and Ethernet interfaces.

4. The read/write conversion device for the radio frequency smart card according to claim 1, wherein the feature is:

The working frequency band of the radio frequency smart card (21) includes a UHF band, a 2.4G band, and a 5.8G band.

5. The read/write conversion device for a radio frequency smart card according to claim 1 or 3, wherein:

The radio frequency antenna (12)' operates in the same frequency band as the radio frequency smart card (21); the radio frequency transceiver module (13) and the radio frequency smart card (21) also operate in the same frequency band.

6. The read/write conversion device for a radio frequency smart card according to claim 1, wherein:

The management control module MCU (14) achieves control of the communication between the RF transceiver module (13) and the RF smart card U1 by performing the operation of the registers in the RF transceiver module (13), and completes reading the contents of the RF smart card (21). process.

7. The read/write conversion device for the radio frequency smart card according to claim 1, wherein the feature is:

The radio frequency transceiver module (13⁄4 and the control and management control module MCUU4) is connected through SPI Port, UART or / ² C interface interconnection.

^8. The read/write conversion device for a radio frequency smart card according to claim 1 or 2, wherein:

The software running on the host computer ( ²³ ) needs to be modified according to whether the dedicated software interface on the management control module MCU (14) is open.

^9. The read/write conversion device for a radio frequency smart card according to claim 1 or 2, wherein:

When the dedicated software interface is opened, the read/write conversion device (10) can support a series of commands related to Mifare, and the read/write conversion device (10) itself and the radio frequency smart card (21) perform corresponding coordination processing, and the upper computer The command of ( ²³ ) is converted to the corresponding operation of the RF smart card (21), so that the host computer (23) considers itself to operate on a Mifare card operating at 13.56Mhz.

10. A method for reading and writing conversion of a radio frequency smart card, a radio frequency smart card reading and writing conversion device (10) based on the patent claim 1, characterized in that the method comprises the steps of:

A. The read/write conversion device (10) receives an operation command sent by the host computer (23);

B. The read/write conversion device (10) determines whether the operation is a card operation command or a device operation command, and if the command is a device operation command, the read/write conversion device (10) is operated according to the operation command;

C, step B, if it is determined that the card operation command, the read-write conversion device (10) sends the command to the radio frequency smart card (21);

D, the RF smart card (21) performs corresponding operations, and returns the result of the operation to the read-write conversion device (10);

E. The read/write conversion device (10) returns the result to the upper computer (23) to complete a data exchange process.