KR19980075363A - Wireless Calling Method Using Encryption Password - Google Patents

Abstract

1. TECHNICAL FIELD OF THE INVENTION

The present invention relates to a wireless calling method.

2. The technical problem to be solved by the invention

The present invention encrypts and transmits a call message to a subscriber using a separate encryption password in a general wireless calling service and decrypts it using an encryption password at a wireless calling terminal, thereby stealing the call number assigned to a specific individual. To provide a wireless calling method to prevent use.

3. Summary of Solution to Invention

The present invention encrypts a message to be transmitted using a separate encryption password to prevent theft and use of a call number, a cap code, and a channel frequency of a wireless calling terminal in use in a wireless calling service. And decrypt the message using the same encryption password in the wireless calling terminal, so that even if the user uses the unique identifier (ID) of the wireless calling terminal, if the registered encryption password is not known, the message of normal contents cannot be received. There is.

4. Important uses of the invention

The present invention is used for radio calling service.

Description

Wireless Calling Method Using Encryption Password

The present invention encrypts and transmits a call message to a subscriber using a separate encryption password in a general wireless calling service and decrypts it using an encryption password at a wireless calling terminal, thereby stealing the call number assigned to a specific individual. The present invention relates to a wireless calling method for preventing use.

FIG. 1 is a structural diagram of a general POCSAG code, FIG. 2 is a structural diagram of a codeword of a general abbreviation code of FIG. 1, and FIG.

The wireless calling service in Korea uses 146MHz to 174MHz and 322.025MHz to 328.600MHz, the transmission speed is 1200bps and the coding method is POCSAG (POstAG Code Standardization Advisory) Group) is using the code method.

The shape of the POCSAG CODE is 1010... It consists of a preamble signal of 576 consecutive patterns, 32 bits of synchronization code (SC), and several batch signals of 8 frames carrying subscriber call messages. .

Each frame has two codewords, and the structure of each codeword is shown in FIG.

The codeword indicates that if the message flag status of the first bit is 0, the subsequent content is address. If the message flag status of the first bit is 1, the subsequent content is displayed. Indicates a call message.

In this case, the address is recorded by converting seven digits called cap codes into 18-bit binary data as shown in FIG. 3.

4A is a flowchart illustrating a transmission process for a conventional radio calling method.

First, upon receiving the radio call service request from the user (31), it is determined whether the user's radio call number is normal (32). If it is not normal, an error message is output to the user and terminated (33). In step 34, the user generates a tone to input a radio call message.

Thereafter, when the user completes the reception of all the radio call messages input by the user (35, 36), the subscriber to be called is identified (37) and the radio call data is transmitted to the base station of the corresponding area (38). The base station converts the received radio call message into a paging protocol (39) and broadcasts it on the corresponding channel (40).

4B is a flowchart of a reception process for a conventional radio calling method.

First, when its own radio call message transmitted from the radio call base station is received (41), after completing reception of all radio call messages (42), the received radio call message is processed and stored in a memory, and a liquid crystal display (LCD) And to generate a tone or vibration (43).

In general, each radio call terminal is assigned a unique cap code, and at this time, a specific channel frequency in the above-mentioned use frequency band is also assigned.

On the basis of this, the mobile call providers assign a phone number (e.g. 012-xxx-xxxx, 015-xxx-xxxx) to a specific cap code and channel frequency. In the form of a bread code as shown in FIG. 1, a predetermined cap code, not a telephone number, is input to a position of FIG. 2 and transmitted at a corresponding frequency.

A subscriber using such a conventional wireless calling terminal receives a telephone number from a corresponding wireless calling service provider when subscribing to a service. At this time, the wireless calling service provider manages by inputting a cap code and channel frequency information recorded in the wireless calling terminal owned by the subscriber to the assigned telephone number.

As such, the cap code and the channel frequency information are unique to each wireless calling terminal, and the information is attached to the wireless calling terminal in the form of a sticker. There is a problem that can be entered and used information.

The present invention has been made in order to solve the above problems, in order to prevent the use of the call number, cap code, and channel frequency of the wireless calling terminal in use in a wireless calling service, a separate encryption password Encrypts and transmits a message to be sent using the same, and decrypts the message by using the same encryption password in the wireless calling terminal, even if stealing the unique identifier (ID) of the wireless calling terminal even if the registered encryption password is unknown An object of the present invention is to provide a wireless calling method that prevents the reception of a message.

1 is a structural diagram of a general POCSAG code,

2 is a codeword structure diagram of a general bread code;

3 is a structure diagram of an address bit of a general firefox code codeword;

4A and 4B are flowcharts illustrating a conventional radio calling method;

5 is a configuration diagram of a general wireless call system to which the present invention is applied;

6 is an explanatory diagram for one embodiment of an encryption scheme according to the present invention;

7 is an explanatory diagram of an embodiment of a decoding method according to the present invention;

8A and 8B are a process flow diagram for a radio calling method according to the present invention.

* Explanation of symbols for the main parts of the drawings

51: public communication network 52: wireless calling network

53: base station 54: wireless calling terminal

In order to achieve the above object, the present invention provides a radio calling method applied to a radio calling network, comprising: a first step of receiving a radio calling message according to a radio calling service request of a user; A second step of encrypting a wireless call message intended to call a subscriber using an encryption function using a password; A third step of identifying a region where a subscriber to be called is registered and calling the subscriber; And a fourth step in which the wireless call terminal having an encryption function decrypts the received wireless call message using the password and outputs the same to the subscriber.

Hereinafter, an embodiment according to the present invention will be described in detail with reference to FIG. 5 and below.

FIG. 5 is a configuration diagram of a general wireless calling system to which the present invention is applied, in which FIG. 51 is a public communication network, 52 is a wireless calling network, 53 is a base station, and 54 is a wireless calling terminal.

When the user calls the radio calling subscriber through the public telecommunication network 51, the radio paging network 52 receives a radio paging message (call tone or voice message) from the public telecommunication network 51, and the base station in the area where the subscriber to be called is registered. By broadcasting through the 53, the corresponding wireless calling terminal 54 receives the wireless calling message.

6 is an explanatory diagram for one embodiment of an encryption scheme according to the present invention.

Looking at an example of the encryption password used in the present invention, 2 digits of the four-digit password number of the voicemail box already used. In other words, the user selects two numbers in various ways, such as using the first and second numbers of the four numbers designated by the password of the voicemail box or using the third and fourth numbers. On the other hand, unlike the password of the voicemail may be used to specify a new password.

When the transmitting side (operator side) processes the wireless calling message, the wireless call is performed by applying the encryption method only to the subscriber having the wireless calling terminal with encryption function, and the subscriber having the existing wireless calling terminal without encryption function. Service to prevent the encryption method from being applied by adjusting the encryption password to 0.

In the encryption method of the radio call message, the radio call message to be transmitted is cut off by two digits from the most significant bit, and then the value obtained by subtracting the two-digit encryption password from each two-digit radio call message is transmitted. In this case, the subtraction method calculates a decimal number by one digit and generates a borrow to prevent a negative value from being generated. In this case, the reason why the message is calculated in units of one digit is that an odd number of radio call messages may occur.

For example, if the message before transmission is 1234567 and the encryption password is 79, the message after encryption becomes 4365870 as shown in FIG. At this time, the space code does not calculate.

7 is a diagram illustrating an embodiment of a decoding method according to the present invention.

The wireless calling terminal stores the encryption password designated by each subscriber in the memory. This encryption password is the same as described in Figure 6 above.

The receiving side (radio call terminal) breaks the received radio call message by two digits from the most significant bit, and then decodes the original radio call message by adding a two-digit encryption password to each two-digit radio call message. At this time, the addition method calculates by one digit as a decimal number and ignores the carry when a carry occurs. In this case, the reason why the message is calculated in units of one digit is that an odd number of radio call messages may occur.

For example, if the received message is 4365870 and the encryption password is 79, the decrypted message becomes 1234567 as shown in FIG. At this time, if there is a space code, it is recognized that the end of the radio call message.

8A is a flowchart illustrating a transmission process for a radio calling method according to the present invention.

First, upon receipt of a wireless call service request from a user (81), it is determined whether the user's wireless call number is normal (82). If it is not normal, an error message is output to the user and terminated (83). In step 84, the user generates a tone to input a radio call message.

Subsequently, when the user completes reception of all the radio calling messages input by the user (85,86), it is determined whether the subscriber to be called is the subscriber using the encryption function (87). 6 is encrypted using the method described with reference to FIG. 6, and if the subscriber does not use the encryption function, as described with reference to FIG.

Thereafter, the subscriber to be called checks the registered region (90) and transmits the radio call data to the base station of the corresponding region (91). The base station converts the received radio page message into a paging protocol (92) and broadcasts it on the corresponding channel (93).

8B is a flowchart of a receiving process for a radio calling method according to the present invention.

First, when its own radio call message sent from the radio call base station is received (101) after completing reception of all radio call messages (102), it is determined whether the radio calling terminal has an encryption function (103) and uses the encryption function. When the encryption password is checked (104), the radio call message received by the method described with reference to FIG. 7 is decrypted (105), the radio call message is processed, stored in a memory, and displayed on a liquid crystal display (LCD), Generates tone or vibration (106). Meanwhile, when the encryption function is not used, the wireless call message is processed and stored in the memory, displayed on the LCD, and generates a tone or vibration (106).

The present invention described above is capable of various substitutions, modifications, and changes without departing from the spirit of the present invention for those skilled in the art to which the present invention pertains, and the above-described embodiments and accompanying It is not limited to the drawing.

The present invention as described above, in order to prevent the use of the wireless call number, capcode, and channel frequency of the wireless call terminal in use in the conventional wireless call service, using a separate encryption password wireless call By encrypting and sending a message, even if another person uses the unique identifier (ID) of the wireless calling terminal without knowing the registered encryption password, even if the wireless calling message is received, the normal contents cannot be read, thereby preventing theft. It has an effect.

Claims (9)

In the wireless call method applied to a wireless call network, Receiving a radio call message according to a radio call service request of a user; A second step of encrypting a wireless call message intended to call a subscriber using an encryption function using a password; A third step of identifying a region where a subscriber to be called is registered and calling the subscriber; And And a fourth step of decrypting the received wireless call message using the password and outputting the received wireless call message to the subscriber when the wireless call terminal having the encryption function is received. The method of claim 1, The second step, A fifth step of determining whether the subscriber to be called is a subscriber using an encryption function; A sixth step of performing the fourth step after encrypting the received wireless paging message with the password as a result of the determination in the fifth step; And And a seventh step of performing the fourth step after preventing the encryption process if the subscriber does not use the encryption function as a result of the fifth step. The method according to claim 1 or 2, The encryption process, And after the radio call message to be transmitted is cut from the most significant bit to a predetermined digit, the wireless call message is encrypted by subtracting the password of the predetermined digit from each radio call message having the predetermined digit. The method of claim 3, wherein The subtraction process, The digital calling method is calculated by a digit (digit) by one digit, and generates by calculating a borrow (borrow) in order to prevent the generation of a negative value. The method of claim 4, wherein The decoding process, And after breaking the received radio call message from the most significant bit into the predetermined digits, the original radio call message is decoded by adding a password of the predetermined digits to each radio call message having the predetermined digits. How to call. The method of claim 5, The addition process, The method of calculating a number by one digit (dicimal), and when a carry occurs (carry), the radio calling method characterized in that the carry is ignored. The method of claim 6, The password, Wireless calling method characterized in that using the password of the voicemail. The method of claim 7, wherein The password, Wireless calling method, characterized in that for selecting the two-digit of the predetermined position of the four-digit password of the voicemail box. The method of claim 8, The seventh step, If the subscriber does not use the encryption function, the fourth step is performed after adjusting the password to 0 to prevent encryption processing.