WO2009140810A1

WO2009140810A1 - Method of contorlling effective communicaion distance of radio frequency sim card based on the radio frequency sim card

Info

Publication number: WO2009140810A1
Application number: PCT/CN2008/001979
Authority: WO
Inventors: 朱杉
Original assignee: 深圳市中兴集成电路设计有限责任公司
Priority date: 2008-05-19
Filing date: 2008-12-05
Publication date: 2009-11-26
Also published as: CN101330684B; CN101330684A

Abstract

A method of controlling effective communication distance of radio frequency SIM card based on the radio frequency SIM card is provided, which includes: building a mapping table of radio frequency parameter for mobile communication terminal, reading the IMEI number of the mobile communication terminal with radio frequency SIM card and determining the type of the mobile communication terminal under the control of central processing unit CPU of the radio frequency SIM card; searching the radio frequency parameters corresponding to the mobile communication terminal in the mapping table of radio frequency parameter for mobile communication terminal, and using the parameters; informing the user to execute a radio frequency parameter collation if the radio frequency parameters corresponding to the mobile communication terminal can not be found in the mapping table of radio frequency parameter for mobile communication terminal. This method makes different mobile communication terminals with radio frequency SIM card have almost same effective communication distances. The radio frequency parameters of the radio frequency SIM card can be updated automatically even if the mobile communication terminal is changed, which effectively avoids the events of reading a card unnecessarily, reading a card wrongly and missing reading a card and provides convenience for users.

Description

Method for controlling effective communication distance based on radio frequency SIM card

The present invention relates to a radio frequency signal strength control method of a SIM card built in a mobile communication terminal and having a radio frequency transceiver interface, and particularly relates to controlling radio frequency signal strength according to a mobile communication terminal, so that the radio frequency effective communication distance of each terminal is Roughly the same method. Background technique

The user identity module of the existing mobile communication technology, the Subscriber Identity Model card, referred to as the SIM card, is widely used as a user identification device for a mobile communication terminal. With the development of science and technology, various intelligent circuit modules are added to the SIM card body of an ordinary mobile communication terminal by various methods, so that the modified SIM card has a basic S card function in addition to the basic S card function, and is more close to The function of life, RF SM card is one of them.

The radio frequency SIM card is a SIM card with radio frequency wireless communication function, and includes an integrated circuit in the card body and the card body. The card body is provided with an interface that can be matched with the mobile phone SM card holder, and the integrated circuit in the card comprises a central processing unit CPU, a radio frequency SM card memory electrically connected to the central processing unit CPU, a radio frequency transceiver circuit and an interface circuit. And a radio frequency transceiver antenna electrically connected to the radio frequency transceiver circuit. The radio frequency SIM card is electrically connected to the mobile communication terminal by means of an interface circuit and an interface on the radio frequency SM card body. The radio frequency SM card can communicate with the mobile communication terminal to implement the standard functions of the conventional S card, and can also communicate with the matched peripheral processing device within a short distance through the radio frequency transceiver circuit and the radio frequency transceiver antenna. The communication content and process are specifically processed by a central processing unit CPU in the radio frequency SIM card, and if necessary, the central processing unit CPU sends an instruction to the mobile communication terminal to control through a data line on the mobile communication terminal SM card holder and using a standard protocol. The screen display and keyboard input of the mobile communication terminal. The SM Card Tool Kit of the radio frequency SM card, referred to as STK technology, is implemented by a small programming software that is solidified in the radio frequency SIM card, and provides a simple and easy-to-operate development platform for the value-added service of the radio frequency SM card. The contribution of the STK technology makes it possible to design a menu with rich functions and simple operation in the RF SM card, and the user can perform data input and menu operation on the RF SIM card through visual and interactive means. The radio frequency S card is mostly used for mobile phones, and in addition to all the functions of the conventional SIM card, the mobile phone can also have the functions of a smart card such as a bus pass card, an access pass card, a credit card, a micro payment card, and a time card. Moreover, the information generated in the process of the various smart cards can be directly displayed on the screen of the mobile phone, and the user performs various operations through the keyboard of the mobile phone. When the radio frequency S card is used as a smart card such as a bus pass card, an access pass card, a credit card, a micro payment card, a time card, etc., in order to avoid misreading of the card operation and misreading of the card, the movement of the radio frequency SM card is installed. The distance that the communication terminal leaves the card reader, that is, the effective communication distance of the radio frequency, must be limited to a certain range. When the radio frequency transceiver power of the radio frequency SM card is constant, the radio frequency effective communication distance is affected by the shielding effect of the mobile communication terminal. The shielding effect of the mobile communication terminal is mainly determined by the material and manufacturing process of the outer casing, and the radio frequency transceiver power of the radio frequency SIM card is determined by the radio frequency parameter set by the radio frequency SIM card. For a radio frequency SIM card with radio frequency transceiver power, if the radio frequency SIM card is installed in a mobile communication terminal with poor shielding effect, the radio frequency effective communication distance will be relatively long, and some can even reach about 1 meter, which is easy to cause misreading. Card and misreading card; If the radio frequency SIM card is installed in a mobile communication terminal with good shielding effect, the radio frequency effective communication distance is very close, and some even cannot transmit and receive radio frequency signals at all, resulting in no card reading phenomenon. In order to avoid the above-mentioned drawbacks, the user must re-calibrate the radio frequency transceiver power of the radio frequency SIM card to the service network before using the radio frequency SM card or when replacing the mobile communication terminal, that is, the radio frequency effective communication of the mobile communication terminal with the radio frequency SIM card installed. The distance is re-corrected, and the proofreading process is complicated, which causes great inconvenience to the user. With the improvement of people's living standards, the situation that users need to replace mobile communication terminals often occurs, so that the radio frequency S card can automatically change its radio frequency parameter settings according to different mobile communication terminals, so that the radio frequency SIM card is installed in different mobile communication terminals. It is particularly important to have roughly the same RF effective communication distance. Summary of the invention

The technical problem to be solved by the present invention is to avoid the deficiencies of the prior art and propose a method for controlling the effective communication distance based on the radio frequency SIM card, the method setting the radio frequency parameter of the radio frequency SIM card according to the IMEI number of the mobile communication terminal, Different mobile communication terminals equipped with radio frequency SM cards have substantially the same radio frequency effective communication distance. The IMEI is an abbreviation of International Mobile Equipment Identification Number, and each mobile communication terminal has its own unique corresponding IMEI number.

The technical problem solved by the present invention can be achieved by using the following technical solutions:

Implementing a method for controlling an effective communication distance based on a radio frequency SIM card, the radio frequency SIM card comprising a central processing unit CPU, a radio frequency SIM card memory electrically connected to the central processing unit CPU, a radio frequency transceiver circuit and an interface circuit, and a radio frequency transceiver antenna electrically connected to the radio frequency transceiver circuit; the interface circuit is configured to be connected to the mobile communication terminal; the radio frequency transceiver circuit determines the radio frequency transceiving power according to the radio frequency parameter, and further determines the communication distance of the radio frequency signal; in particular, the method includes the following Step -.

A. Through experiments to determine the types of mobile communication terminals and the radio frequency that need to be set when using the radio frequency SIM card Corresponding relationship between the parameters, and establishing a radio frequency parameter correspondence table of the mobile communication terminal, and storing the radio frequency parameter correspondence table of the mobile communication terminal in the memory;

B. Under the control of the central processing unit CPU of the radio frequency SM card, reading the MEI number of the mobile communication terminal on which the radio frequency SIM card is installed, determining the type of the mobile communication terminal; in the radio frequency parameter correspondence table of the mobile communication terminal The radio frequency parameter corresponding to the mobile communication terminal is searched for and the radio frequency parameter is enabled. If the radio frequency parameter corresponding to the mobile communication terminal is not found in the radio frequency parameter correspondence table of the mobile communication terminal, the user is prompted to perform radio frequency parameter calibration.

The memory stored in the radio frequency parameter correspondence table of the mobile communication terminal in step A is a radio frequency SIM card memory or a memory other than the radio frequency SM card.

Specifically, step B further includes the following sub-steps:

B1. The radio frequency SIM card is powered on, the radio frequency transceiver circuit is disconnected, and the radio frequency function of the radio frequency SIM card is turned off;

B2. The radio frequency SIM card issues an active STK command, and reads the MEI number of the current mobile communication terminal on which the radio frequency SM card is installed;

B3. Comparing the IMEI number of the current mobile communication terminal read in step B2 with the MEI number of the default mobile communication terminal stored in the radio frequency SIM card memory, if the current EI number of the mobile communication terminal and the IMEI of the default mobile communication terminal If the number is the same, step B5 is performed directly; if the IMEI number of the current mobile communication terminal is different from the IMEI number of the default mobile communication terminal, step B4 and B5 are sequentially performed;

B4. Searching the IMEI number of the current mobile communication terminal in the radio frequency parameter correspondence table of the mobile communication terminal, and if the IMEI number of the current mobile communication terminal is found in the radio frequency parameter correspondence table of the mobile communication terminal, according to the MEI of the current mobile communication terminal The number determines the type of the mobile communication terminal, sets the radio frequency parameter corresponding to the type of the mobile communication terminal as the default radio frequency parameter of the radio frequency S card, and sets the IMEI number of the current mobile communication terminal as the MEI number of the default mobile communication terminal, and stores the radio frequency into the radio frequency If the current mobile communication terminal IMEI number is not found in the radio frequency parameter correspondence table of the mobile communication terminal, the user is prompted to perform radio frequency parameter proofreading;

B5. Enable the default RF parameters of the RF SIM card, connect the RF transceiver circuit of the RF SM card, open the RF function of the RF SIM card, and the RF SIM card works normally.

The above sub-step B2 further includes the following steps:

B2 - 1. The radio frequency SIM card issues an active STK command;

B2 - 2. Determine whether the command FETCH is received; if it is received, perform steps B2 - 3 and B2 - 4 in sequence; if not, run the program according to other commands; B2 - 3. Sending the STK command PROVIDE LOCAL INFORMATION to the mobile communication terminal, reading the IMEI number of the mobile communication terminal;

B2 - 4. Return status word SW=9000.

The radio frequency signals transmitted and received by the radio frequency SM card include signals operating in the ultra high frequency SHF band, the very high frequency VHF band or the ultra high frequency UHF band. The radio frequency SIM card is suitable for short-range wireless communication, including bus travel card wireless communication, access control card wireless communication, and electronic wallet wireless communication.

Compared with the prior art, the beneficial effects of the "method of controlling the effective communication distance based on the radio frequency SIM card" are as follows:

For most mobile communication terminals, the radio frequency parameters of the radio frequency SIM card are automatically updated when the device is replaced, so that different mobile communication terminals equipped with the radio frequency SIM card have substantially the same radio frequency communication distance, thereby effectively avoiding misreading. The card, the wrong card reading and the phenomenon of not reading the card are convenient for the user. DRAWINGS

1 is a schematic diagram of an application environment of the radio frequency SIM card according to the method for controlling an effective communication distance based on a radio frequency SM card according to the present invention;

2 is a schematic diagram of an electrical principle of a radio frequency SIM card according to a preferred embodiment of the present invention;

Figure 3 is a flow chart of a preferred embodiment of the present invention;

4 is a flow chart of reading a MEI number of a mobile communication terminal by a radio frequency SIM card according to a preferred embodiment of the present invention; FIG. 5 is a schematic diagram of a radio frequency parameter correspondence table of a mobile communication terminal according to a preferred embodiment of the present invention;

Figure 6 is a diagram showing the coding rules of the IMEI number according to the present invention. detailed description

The following is further described in detail in conjunction with the preferred embodiments shown in the drawings.

The present invention relates to a method for controlling an effective communication distance based on a radio frequency SIM card. The application environment of the radio frequency SIM card is as shown in FIG. 1. The radio frequency SIM card 200 is loaded into the mobile communication terminal 100 by means of a radio frequency transceiver circuit and The radio frequency transmitting and receiving antennas, the radio frequency SIM card 200 and the radio frequency card reader 300 perform data exchange; as shown in FIG. 2, the radio frequency SIM card 200 includes a central processing unit CPU 201, and a radio frequency SIM card memory 202 electrically connected to the central processing unit CPU 201. The radio frequency transceiver circuit 204 and the interface circuit 203, and the radio frequency transceiver antenna 205 electrically connected to the radio frequency transceiver circuit 204; the interface circuit 204 is used for connecting with the mobile communication terminal; the radio frequency transceiver circuit 204 determines the radio frequency transceiver power according to the radio frequency parameter. And determining the communication distance of the radio frequency signal; In particular, the method comprises the steps of:

A. Determine the correspondence between various types of mobile communication terminals and the radio frequency parameters that need to be set when using the radio frequency SIM card, and establish a radio frequency parameter correspondence table of the mobile communication terminal, and store the radio frequency parameter correspondence table of the mobile communication terminal Into the memory;

B. Under the control of the central processing unit CPU of the radio frequency SM card, reading the IMEI number of the mobile communication terminal on which the radio frequency SIM card is installed, determining the type of the mobile communication terminal; in the radio frequency parameter correspondence table of the mobile communication terminal The radio frequency parameter corresponding to the mobile communication terminal is searched for and the radio frequency parameter is enabled. If the radio frequency parameter corresponding to the mobile communication terminal is not found in the radio frequency parameter correspondence table of the mobile communication terminal, the user is prompted to perform radio frequency parameter calibration.

As shown in FIG. 5, the radio frequency parameter correspondence table of the mobile communication terminal according to the preferred embodiment of the present invention includes the model of the mobile communication terminal, the IMEI number of the mobile communication terminal, and the radio frequency parameter that needs to be set when the mobile communication terminal uses the radio frequency SIM card. According to the EI number of the mobile communication terminal, the model of the mobile communication terminal and the radio frequency parameter to be set can be uniquely determined. As shown in Fig. 6, the IMEI number usually has 15 digits, including a 6-digit device approval model, 2 final assembly numbers, which are simply referred to as equipment numbers, a 6-digit serial number, and a 1-digit spare code. Since a mobile communication terminal has only a unique IMEI number, the model and manufacturer of the mobile communication terminal can be uniquely determined by the MEI number. As shown in FIG. 2, the memory for storing the radio frequency parameter correspondence table of the mobile communication terminal may be the radio frequency SIM card memory 202 or the memory 400 of the radio frequency SIM card memory peripheral.

The radio frequency signals transmitted and received by the radio frequency SM card include signals operating in the ultra high frequency SHF band, the very high frequency VHF band or the ultra high frequency UHF band.

The radio frequency parameter correspondence table of the mobile communication terminal of the present invention covers radio frequency parameters applicable to respective radio frequency SIM cards of most mobile communication terminals, and by using the uniqueness of the EI number of the mobile communication terminal, determining that each mobile communication terminal uses the radio frequency SIM card Each radio frequency parameter needs to be set. The radio frequency SIM card finds the radio frequency parameter of the mobile communication terminal where it is located, determines the radio frequency transceiver power, and thus controls the radio frequency effective communication distance, so that the radio frequency effective communication distance of different types of mobile communication terminals It is roughly the same, effectively avoiding the phenomenon of misreading cards, misreading cards and not reading cards.

As shown in FIG. 3, the preferred embodiment of the present invention performs the above steps B by the following specific steps:

B1. Steps 501 and 502 shown in FIG. 3, after the mobile communication terminal is powered on, after the radio frequency SIM card is powered on, the basic function of the SIM card is activated, and at the same time, the radio frequency transceiver circuit is disconnected, and the radio frequency function of the radio frequency SIM card is turned off. ;

B2. That is, in step 503 shown in FIG. 3, the radio frequency S card issues an active STK command, and the read and install is performed. The IMEI number of the current mobile communication terminal of the radio frequency SIM card;

B3. That is, step 504 shown in FIG. 3, comparing the IMEI number of the current mobile communication terminal read in step B2 with the MEI number of the default mobile communication terminal stored in the radio frequency SIM card memory, if the current mobile communication terminal I The EI number is the same as the IMEI number of the default mobile communication terminal, and directly performs step B5; if the IMEI number of the current mobile communication terminal is different from the IMEI number of the default mobile communication terminal, step B4 and B5 are sequentially executed;

B4. In step 505, as shown in FIG. 3, the IMEI number of the current mobile communication terminal is searched in the radio frequency parameter correspondence table of the mobile communication terminal, and the IMEI number of the current mobile communication terminal is found in the radio frequency parameter correspondence table of the mobile communication terminal. Step 506: Determine a mobile communication terminal type according to the current mobile communication terminal IMEI number, set the radio frequency parameter corresponding to the mobile communication terminal type to a default radio frequency parameter of the radio frequency SIM card, and then perform step 507 to set the IMEI of the current mobile communication terminal. The number is set to the IMEI number of the default mobile communication terminal, and is stored in the radio frequency SIM card memory. If the IMEI number of the current mobile communication terminal is not found in the radio frequency parameter correspondence table of the mobile communication terminal, step 508 is executed to prompt the user to perform the radio frequency parameter. Proofreading, and skipping step B5 to terminate the operation of the radio frequency SIM card program;

B5. Step 509 shown in Figure 3, enable the default RF parameters of the RF SIM card, connect the RF transceiver circuit of the RF SIM card, open the RF function of the RF SM card, and the RF SIM card works normally.

As shown in FIG. 4, the above step B2 of the preferred embodiment of the present invention can be further refined into the following steps:

B2 - 1. Step 601 shown in Figure 4, the radio frequency SIM card issues an active STK command;

B2 - 2. That is, step 602 shown in FIG. 4, it is judged whether the command FETCH is received; if it is received, steps B2 - 3 and B2 - 4 are sequentially executed; if not, step 604 is executed, that is, the program is executed according to other commands. ;

B2 - 3. Step 603 shown in FIG. 4, sending STK command PROVIDE LOCAL INFORMATION to the mobile communication terminal, reading the IMEI number of the mobile communication terminal;

B2 - 4. That is, step 605 shown in Fig. 4, after reading the MEI number of the mobile communication terminal, returning the status word SW = 9000.

In step B4 of the preferred embodiment of the present invention, the user is prompted to perform radio frequency parameter calibration, and the STK instruction DISPLAYTEXT is sent through the radio frequency S card to complete the display of the prompt information.

The method for controlling the radio frequency effective communication distance of the present invention, for most mobile communication terminals, automatically changing the radio frequency parameters of the radio frequency SIM card in the case of replacing the device, so that different mobile communication terminals installing the radio frequency SIM card have a rough The same RF communication distance effectively avoids the phenomenon of misreading cards, misreading cards and not reading cards, which is convenient for users.

Claims

Rights request

A method for controlling an effective communication distance based on a radio frequency SIM card, the radio frequency SIM card comprising a central processing unit CPU, a radio frequency SIM card memory electrically connected to the central processing unit CPU, a radio frequency transceiver circuit and an interface circuit, and a radio frequency transceiver antenna electrically connected to the radio frequency transceiver circuit; the interface circuit is configured to be connected to the mobile communication terminal; the radio frequency transceiver circuit determines the radio frequency transceiving power according to the radio frequency parameter, and further determines the communication distance of the radio frequency signal; wherein the method includes The following steps -

B. Under the control of the central processing unit CPU of the radio frequency SIM card, reading the MEI number of the mobile communication terminal on which the radio frequency SIM card is installed, determining the type of the mobile communication terminal; in the radio frequency parameter correspondence table of the mobile communication terminal The radio frequency parameter corresponding to the mobile communication terminal is searched for and the radio frequency parameter is enabled. If the radio frequency parameter corresponding to the mobile communication terminal is not found in the radio frequency parameter correspondence table of the mobile communication terminal, the user is prompted to perform radio frequency parameter calibration.

The method for controlling the effective communication distance based on the radio frequency SM card according to claim 1, wherein: the memory stored in the radio frequency parameter correspondence table of the mobile communication terminal in step A is a radio frequency SM. card memory, or A memory other than the radio frequency SIM card.

3. The method for controlling an effective communication distance based on a radio frequency S card according to claim 1, wherein: step B further comprises the following substeps:

B2. The radio frequency SIM card issues an active STK command, and reads the MEI number of the current mobile communication terminal on which the radio frequency SIM card is installed;

B3. Comparing the IMEI number of the current mobile communication terminal read in step B2 with the number of the default mobile communication terminal IMEI stored in the radio frequency SIM card storage, if the IMEI number of the current mobile communication terminal and the default mobile communication terminal If the IMEI number is the same, step B5 is performed directly; if the current EI number of the mobile communication terminal is different from the default mobile communication terminal IMEI number, steps B4 and B5 are sequentially performed;

B4. Searching for the MEI of the current mobile communication terminal in the radio frequency parameter correspondence table of the mobile communication terminal If the IMEI number of the current mobile communication terminal is found in the radio frequency parameter correspondence table of the mobile communication terminal, the mobile communication terminal type is determined according to the MEI number of the current mobile communication terminal, and the radio frequency parameter corresponding to the mobile communication terminal type is set to the radio frequency. The default radio frequency parameter of the SIM card, and the IMEI number of the current mobile communication terminal is set as the IMEI number of the default mobile communication terminal, and stored in the radio frequency SIM card memory; if the current mobile is not found in the radio frequency parameter correspondence table of the mobile communication terminal The IMEI number of the communication terminal prompts the user to perform radio frequency parameter proofreading;

B5. Enable the default RF parameters of the RF SIM card, connect the RF transceiver circuit of the RF SIM card, and open the RF function of the RF SIM card. The RF SIM card works normally.

4. The method for controlling an effective communication distance based on a radio frequency SIM card according to claim 3, wherein: step B2 further comprises the following steps:

B2 - 1. The radio frequency SIM card issues an active STK command;

B2 - 2. Determine whether the command FETCH is received; if it is received, perform steps B2 - 3 and B2 - 4 in sequence; if not, run the program according to other commands;

B2 - 3. Sending the STK command PROVIDE LOCAL INFORMATION to the mobile communication terminal, reading the EI number of the mobile communication terminal;

B2 - 4. Return status word SW=9000.

5. The method for controlling an effective communication distance based on a radio frequency SIM card according to claim 1, wherein: the radio frequency signal transmitted and received by the radio frequency SIM card comprises operating in an ultra high frequency SHF frequency band, a very high frequency VHF frequency band or a special Signal in the high frequency UHF band. ₍

6. The method for controlling an effective communication distance based on a radio frequency SIM card according to claim 1, wherein: the radio frequency SIM card is suitable for short-range wireless communication, including bus travel card wireless communication, access control card wireless communication Wireless communication with the e-wallet.