KR100528974B1 - The method for transmitting and receiving of DARC data - Google Patents

Abstract

Disclosed is a method of transmitting / receiving DARC data, in which an ordering head is added to a DARC packet to receive only qualified data in order to provide a class of service according to a user fee. In the DARC data transmission / reception method, service information necessary for each of a plurality of customers who have paid a fee is transmitted / received through a DARC method using FM, and a service data classification step, generating a plurality of DARC packets, a data selection step, and data And decrypting it.

Description

The method for transmitting and receiving of DARC data}

The present invention relates to a network, and more particularly, to transmitting and receiving service data of a DARC (DAta Radio Channel) using FM of a radio.

There are two ways to transmit information using FM (Frequency Modulation) radio waves. One is the RDS (Radio Data System) proposed by the European Broadcasting Union and became the European standard in 1990. The other was developed by NHK and Teracom in Sweden and established in 1995 by the International Telecommunication Standard (ITU-R). Is DARC.

Compared with the current RDS method, the DARC method is advantageous in many respects. For example, in terms of transmission speed, RDS is 1.2Kbps, while DARC has 16Kbps speed, and DARC is relatively cheaper than obtaining information using a general mobile phone because broadcasting is free and only receiving. There is an advantage. However, the biggest advantage is that the existing FM radio broadcasting facility can be used almost as it is, so the sender does not feel the burden of adding additional equipment for such a transmission method. In addition, the use of FM radio has the advantage of longer transmission and reception distance and lower power consumption than wireless data transmission media.

The DARC method currently in use, in conjunction with the Global Position Satellite (GPS) car navigator, is used to broadcast detour information, traffic information, news and stock quotes. I have a test service.

However, the broadcast data may not be rejected even if the receiver does not need it, and there is a disadvantage in that the DARC system cannot provide the information that has to be paid separately for obtaining the information.

In order to overcome this drawback, a method of classifying functions for each layer of data, classifying a service ID and transmitting information according to the method ("F. M additional broadcasting transmission method using F. M additional broadcasting protocol") -Korean Patent Application No. 10-2001-0023856) has been proposed, but it is possible to provide efficient information services and charges because the fields are defined for each service, but it is not possible to provide variable services according to the new service channel classification. It did not overcome the disadvantage of receiving only unnecessary information.

The technical problem to be achieved by the present invention is to add the ordering head to the DARC packet in order to provide a class of service according to the fee paid by the user can receive only the data qualified to the receiver To provide a method.

The DARC data transmission and reception method according to the present invention for achieving the above technical problem, the service information required for each of the plurality of customers who paid the fee for transmission and reception through the DARC method using FM, service data classification step, a plurality of DARC packets Generating, selecting data and decrypting data.

In the service data classification step, a plurality of data including service information requested by a plurality of customers may be classified according to a predetermined criterion defined by a service provider.

In the generating of the DARC packet, a plurality of DARC packets are generated by encrypting each of the classified data using a predetermined encryption key defined by a system operator.

In the data selection step, the plurality of encrypted DARC packets are received via FM radio waves, and the recipients are entitled to themselves by using a portion of a decryption key that decrypts a code of the encryption key among successively received DARC packets. Only this data is selected.

Decrypting the data uses the other portion of the decryption key to decrypt the selected data.

DETAILED DESCRIPTION In order to fully understand the present invention, the operational advantages of the present invention, and the objects achieved by the practice of the present invention, reference should be made to the accompanying drawings that illustrate preferred embodiments of the present invention.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. Like reference numerals in the drawings denote like elements.

DARC data transmission and reception method according to an embodiment of the present invention, to provide a hierarchical service by introducing a coding (coding) and decoding (decoding) technology to the FM-DARC. Currently, coding and decoding technologies exist in various ways and are practically introduced in FM-DARC, but they are not applied to differentiated hierarchical services. Accordingly, the conventional DARC service has a problem in that the service provider must provide all the services transmitted through the FM radio from the perspective of the service user, and from the viewpoint of the service provider, differentiated hierarchical services and There are currently few companies trying to introduce them because there is no special revenue model that allows them to charge corresponding costs.

Therefore, the DARC data transmission and reception method according to an embodiment of the present invention enables providing only the information allowed to each user by providing differentiated hierarchical services of DARC, and it is possible to charge a cost corresponding to the provided service. Let's do it.

1 is a signal flowchart illustrating a method of transmitting and receiving DARC data according to an embodiment of the present invention.

Referring to FIG. 1, in the DARC data transmission / reception method according to an embodiment of the present invention, a service data classification step 110, a plurality of DARC packets are generated 120, a data selection step 130, and a data is decrypted. Step 140 is performed.

In the service data classification step 110, a plurality of data including service information requested by a plurality of customers may be classified according to a predetermined criterion defined by a service provider. For example, the service data classification step may be classified by purpose or order. The plurality of customers may use differentiated information data, which is preferably determined based on a predetermined criterion classified by a service provider such as a cost paid before or after using the information data.

Generating the DARC packet 120 encrypts each of the classified data using a predetermined encryption key defined by a system operator to generate a plurality of DARC packets. There may be a myriad of ways to generate the encryption key, but it is determined by the service provider. For example, it is desirable to use the Data Encryption Standard (DES) which uses a 64-bit symmetric key. This is because DES has not only been verified to some extent but also implemented in hardware, which significantly speeds up encryption and decryption.

In the data selection step 130, the plurality of encrypted DARC packets are received through FM radio waves, and a portion of a decryption key that decrypts a code of the encryption key among the received DARC packets continuously is transmitted to itself. Only select qualified data. In the above method of selection, even if the service user receives all the data through the receiver, the service user can select only the data necessary by the service user's own choice or only the data qualified by the appointment with the provider. You can also use a method of restricting the reception. In the latter case, only the qualified data may be received from the beginning, or the rest may not be decrypted by the step 140 of decrypting the data even if all data is received.

Decrypting data 140 uses another portion of the decryption key to decrypt the selected data.

2 is a diagram illustrating a structure of a DARC packet used in a DARC data transmission / reception method according to an embodiment of the present invention.

Referring to FIG. 2, the DARC packets 210, 250, and 260 each include a DARC header 220, an order field 230, and encryption data 240.

DARC packets 210, 250 and 260 are continuously broadcast via FM radio waves.

The DARC header 220 uses what is used in a conventional DARC packet.

The order field 230 is preferably provided with a total of 256 channels by setting 8 bits as data bits determined according to the order or purpose of classifying customers in the system.

The encryption data 240 preferably uses 64 bits as a data field in which information data to be transmitted is encrypted using an encryption key provided by a system operator.

The DARC header 220 and the entire data 230 and 240 are not encrypted because when the DARC header 220 is encrypted, it is difficult to distinguish the DARC itself from existing equipment. Therefore, it is one of the objectives of the present invention to make the most of the existing equipment or software and to make it possible to implement it with simple software at a minimum cost.

3 is a diagram illustrating a structure of a decryption key used in a DARC data transmission / reception method according to an embodiment of the present invention.

Referring to FIG. 3, the decryption keys 310, 350, and 360 are composed of an order field 320 and decryption data 330.

The order field 330 is data corresponding to the order field 230 of the DARC packet. Decryption data 340 is data that can decrypt the encryption data 240. Viewing the decryption key 310 in terms of data is blocks 330-1 and 340-1. Referring to blocks 330-1 and 340-1, it can be seen that the order field 330 and the decoded data 340 are 8 bits and 64 bits, respectively. This means that the data lengths of the DARC packet 210 and the decryption key 310 match.

1 to 3, in the step of selecting data 130, the order field 230 of the DARC packet and the order field 330 of the decryption key are compared to determine whether the data is entitled to reception. In the step of decrypting the data, it can be seen that the encrypted data is decrypted by applying the decryption data 340 of the decryption key to the encryption data 240 of the DARC packet.

The decryption key 310 may be pre-recorded in a predetermined storage medium (for example, a receiver) to be delivered to and used by a customer, and may be provided to the storage medium or another storage medium by using various methods of communication. can do.

In the above description, the order field is designated as 8 bits, but since the data is not formatted according to the channel order, the order field can be reconfigured as necessary. Decoded data is described as 64 bits, assuming the case of using the DES encryption algorithm.

As described above, the optimum embodiment has been disclosed in the drawings and the specification. Although specific terms have been used herein, they are used only for the purpose of describing the present invention and are not intended to limit the scope of the invention as defined in the claims or the claims. Therefore, those skilled in the art will understand that various modifications and equivalent other embodiments are possible. Therefore, the true technical protection scope of the present invention will be defined by the technical spirit of the appended claims.

As described above, in the DARC data transmission / reception method according to the present invention, from the standpoint of the receiver, that is, the user of the service, only the data necessary for the user can be selected and received, thereby increasing the use efficiency of the received information. From the point of view of the sender, that is, the service provider, there is no additional cost because no additional equipment is required to transmit the service information. In addition, by providing information for each user who has paid a differentiated fee, there are many choices regarding the charging of the fee, thereby satisfying various classes of users. Therefore, it is possible to widen the range of users who want to use the service can increase the profitability of the business. In addition, it is possible to use the existing equipment or software to the maximum, and there is an advantage that can be implemented in a simple software at a minimum cost.

BRIEF DESCRIPTION OF THE DRAWINGS In order to better understand the drawings cited in the detailed description of the invention, a brief description of each drawing is provided.

1 is a signal flowchart illustrating a method of transmitting and receiving DARC data according to an embodiment of the present invention.

2 is a diagram illustrating a structure of a DARC packet used in a DARC data transmission / reception method according to an embodiment of the present invention.

3 is a diagram illustrating a structure of a decryption key used in a DARC data transmission / reception method according to an embodiment of the present invention.

Claims (7)

In the method for transmitting and receiving the service information required for each of the plurality of service users who paid the fee through the DARC method using FM, Classifying a plurality of data including service information requested by a plurality of service users according to predetermined criteria defined by the service provider; Encrypting each of the classified data using a predetermined encryption key defined by a service provider to generate a plurality of DARC packets; Receives the plurality of encrypted DARC packets through FM radio wave, and selects only the data entitled to the recipient by using a portion of a decryption key that decrypts the code of the encryption key among successively received DARC packets. Doing; And And decrypting the selected data by using another predetermined portion of the decryption key. The method of claim 1, wherein the DARC packet, And a packet header, an order field indicating a classification order, and encrypted data obtained by encrypting information data to be transmitted using the encryption key. The method of claim 1 or 2, wherein the decryption key is An order field corresponding to the order field of the encryption key and decryption data capable of decrypting the data encrypted by the encryption key, The predetermined portion, The order field of the decryption key, The other portion is, DARC data transmission and reception method, characterized in that the decrypted data of the decryption key. The method of claim 3, wherein selecting the data comprises: Comparing the order field of the DARC packet with the order field of the decryption key to determine whether the data is entitled to be received. Decrypting the selected data, And decrypting the encrypted data by applying the decrypted data of the decryption key to the encrypted data of the DARC packet. The method of claim 3, wherein the order field, 8-bit data, The encrypted data, Is 64-bit data, The decoded data is, DARC data transmission and reception method characterized in that the 64-bit. The method of claim 3, wherein the decryption key, DARC data transmission and reception method, characterized in that the pre-recorded in a predetermined storage medium can be delivered to the customer to be used, and can be provided to the storage medium or another storage medium using a communication. The method of claim 1, wherein the predetermined criterion is A method of transmitting and receiving DARC data, characterized in that it is determined by a service user's information application request order, information content, information usage fee, or the like, or a combination thereof.