KR20070057358A - Method for providing free broadcasting service by fee - Google Patents

Abstract

A charged service providing method of a free broadcast is provided to modify a frame of a broadcasting signal for a specific area and offer a charged service network which is compatible with a broadcasting free service network and is independently operated. A relay station of a free broadcasting system judges whether a transmission interval of a broadcasting signal is a charged interval(S401,S402). When the transmission interval of the broadcasting signal is the charged interval, the relay station encrypts channel analysis information of the broadcasting signal by using TII(Transmitter Identification Information) about a corresponding relay network(S403,404). The relay station reconfigures a frame of the broadcasting signal, and transmits the reconfigured frame of the broadcasting signal(S405). A mobile communication terminal of a user, who subscribes to a broadcasting charged service, receives the transmitted broadcasting signal, decrypts the channel analysis information by using the TII included in the reconfigured frame of the broadcasting signal, and receives corresponding contents.

Description

How to provide paid service for free broadcasting {Method for providing free broadcasting service by fee}

1 is a block diagram of a terrestrial DMB pay service system according to an embodiment of the present invention.

2 is a block diagram showing the configuration of the mobile communication terminal of FIG.

3 illustrates a frame of a DMB signal.

4 is a flowchart illustrating a relay station procedure of a method for providing a terrestrial DMB paid service according to an exemplary embodiment of the present invention.

5 is a flowchart illustrating a mobile communication terminal side procedure of the method for providing a terrestrial DMB paid service according to an embodiment of the present invention.

Explanation of symbols on the main parts of the drawings

10: Terrestrial DMB paid service system 100: Paid subscriber terminal

200a ~ 200c: Free subscriber terminal 300: Service provider

400: sending station 450: first relay station

500: second relay station 600: communication network

The present invention relates to a method of providing a paid service for free broadcasting, and in particular, by modifying a frame of a broadcast signal for a specific region, free broadcasting that can provide a paid service network operated independently while maintaining compatibility with a broadcasting free service network. It relates to a paid service providing method.

Recently, DMB (Digital Multimedia Broadcasting) service, which is called a handheld TV, has been provided, so that users can enjoy high-quality and high-definition broadcasting of CD and DVD levels through a personal mobile terminal or a vehicle terminal on the go.

The DMB service is divided into a satellite DMB service using a satellite and a terrestrial DMB service using an airwave. The satellite DMB service is mostly a paid service for a specific target, and the terrestrial DMB service is a free service and can be used by an unspecified number. It is a service.

The terrestrial DMB service, which is provided as a free service, receives a signal transmitted from a transmitting station by a relay station having a certain coverage area and transmits the signal into the coverage area, thereby using a terminal having a DMB reception function in the coverage area. Anyone can easily watch DMB broadcasts.

On the other hand, in the case of terrestrial DMB service using airwaves, it is difficult to provide a service in an area where wireless reception is impossible, such as a subway premises, and various methods have been proposed for providing terrestrial DMB service for such areas.

In order to provide services to these areas, a separate relay network must be constructed. Since terrestrial DMB services are targeted to an unspecified number, a paid service method is proposed to cover additional costs for the construction and maintenance of a relay network.

In particular, since mobile communication providers have a relay network capable of mobile communication in underground areas such as underground parking lots or subway stations, it is advantageous to provide terrestrial DMB paid services for areas where wireless reception is difficult using their communication networks. Equipped with.

In light of this situation, there is a demand for a method of providing a paid service that can be operated independently for a specific region while maintaining compatibility with a terrestrial DMB free service network using an existing DMB service system.

The present invention has been proposed in consideration of the above situation, and the fee of the free broadcast that can provide a paid service network that can be operated independently while maintaining compatibility with the broadcast free service network by modifying the frame of the broadcast signal for a specific region It aims to provide a service providing method.

The present invention for achieving the above object comprises the steps of determining, by the relay station of the free broadcasting system whether the transmission section of the broadcast signal is a paid section; Transmitting, by the relay station, encrypting channel analysis information of the broadcast signal using TII (Transmitter Identification Information) for the corresponding relay network and reconstructing and transmitting a frame of the broadcast signal when the paid section is a paid period; A mobile communication terminal subscribed to a broadcast pay service receives the transmitted broadcast signal, decrypts the channel analysis information by using the TII included in the reconstructed frame of the broadcast signal, and receives the corresponding content. Characterized in that the made up.

Preferably, the transmitting step includes a first KEY receiving step of receiving a KEY for a pay service from the communication network subscribed to the mobile communication terminal; Encrypting the channel analysis information by using the TII and the KEY for the corresponding relay network; And inserting the TII into the frame by changing the frame of the broadcast signal.

Preferably, the receiving step comprises: extracting the TII from the frame by receiving a broadcast signal in which the frame is changed; Receiving a second KEY for receiving the KEY for a paid service from the communication network; A generation step of generating a control word (CW) using the received KEY and the extracted TII; Decrypting the encrypted channel analysis information of the received broadcast signal using the generated CW; And extracting the corresponding content from the frame of the received broadcast signal through the decrypted channel analysis information.

Preferably, the generating step may generate the CW by using a CAS (Conditional Access System) algorithm.

The present invention includes a relaying step of relaying and transmitting a broadcast signal received from a transmitting station when the base station determines that the free period is determined; The mobile communication terminal may further include a viewing step of receiving the broadcast signal and watching the corresponding content by using channel analysis information included in the broadcast signal.

Preferably, the free broadcast may be terrestrial DMB.

Preferably, the channel analysis information may be a phase reference symbol (PRS) of the DMB signal.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 is a block diagram of a terrestrial DMB pay service system according to an embodiment of the present invention.

The terrestrial DMB paid service system 10 includes a paid subscriber terminal 100 subscribed to a paid service, a free subscriber terminal 200a to 200c having a DMB receiving function, a service provider 300 for providing various contents, A transmitting station 400 configured to transmit and organize various contents into frames of a DMB signal, a first relay station 450 relaying a DMB signal for a free period, and a second reconstructed and transmitted frame of a DMB signal for a toll section; It is composed of a relay station 500.

The paying subscriber terminal 100 receives the DMB signal from the second relay station 500, as described later, and receives the KEY received from the communication network 600 to which it is subscribed and the TII provided from the second relay station 500. The content is extracted from the DMB signal and viewed.

The free subscriber terminals 200a to 200c are terminals capable of receiving DMB existing in the service area of the first relay station 450. For example, the DMB receiving dedicated terminal 200a and the mobile telephone 200b having a DMB receiving function. , The DMB receiver 200c provided in the vehicle.

Here, the terminals 200a to 200c may receive the DMB signal transmitted from the first relay station 450 through the DMB receiving unit therein without performing service subscription or additional processing.

The service provider 300 is a service provider that provides content through the DMB system, and the content to be provided is inserted into the main service channel (MSC) of the DMB frame and transmitted.

The transmitting station 400 receives various contents from the service provider 300 and configures the content as a frame of the DMB signal and transmits the content.

The first relay station 450 is installed in an area where radio reception is possible, and transmits the DMB signal received from the transmitting station 400 to the service area. The first relay station 450 performs a simple relay function of amplifying and transmitting a signal for a wireless section without performing special processing of the DMB signal.

The second relay station 500 is installed in the pay service section, and the frame of the DMB signal received from the transmitting station 400 is modified as described below and transmitted to the service area. The second relay station 500 is installed in an area where wireless reception is impossible, for example, in a subway station, such as a gap filler, and provides a DMB service to a user for a fee.

2 is a block diagram illustrating a configuration of the mobile communication terminal of FIG. 1.

The paying subscriber terminal 100 receives the RF transceiver 110 for communication with the communication network 600 through the first antenna 112 and the broadcast receiver 115 for receiving DMB broadcasts through the second antenna 117. And a key input unit 120 to which various selections such as content selection and counterpart selection are input, a call with the communication network 600, and a central control unit 130 for processing DMB signals, and processing audio and image signals. CAS 150 for generating a CW for analyzing PRS of the reconstructed DMB frame using the codec 140, the TII of the second relay station 500, and the KEY of the communication network 600, and decoding the DMB signal. A broadcast codec 160, a storage unit 170 for storing the KEY 172 and the generated CW 174 of the communication network 600, a voice input unit 180 and a voice output unit 182 for a call, And an image output unit 184 for displaying the DMB broadcast.

The paid subscriber terminal 100 configured as described above receives the DMB signal from the second relay station 500 through the broadcast receiver 115 and checks whether the frame of the DMB signal is changed, that is, the DMB for the paid service. If it is a signal, the TII of the received frame is extracted and the KEY is received from the communication network 600 through the RF transceiver 110.

In this case, when the CAS 150 generates the CW 174 for interpreting the PRS of the frame using the TII and the KEY, the central controller 130 interprets the PRS included in the frame of the received DMB signal using the same. The broadcast codec 160 extracts the content from the DMB signal and outputs the content to the voice output unit 182 and the image output unit 184, so that the user can be provided with the DMB paid service.

Hereinafter, a method for providing terrestrial DMB paid service according to an embodiment of the present invention will be described with reference to FIGS. 3 to 5.

3 is a diagram illustrating a frame of a DMB signal, FIG. 4 is a flowchart illustrating a relay station side procedure of a method for providing a terrestrial DMB pay service according to an embodiment of the present invention, and FIG. 5 is a terrestrial DMB pay according to an embodiment of the present invention. A flowchart illustrating a mobile communication terminal side procedure of a service providing method.

In step S401, the transmitting station 400 transmits a DMB signal including the content received from the service provider 300.

As shown in FIG. 3, the frame of the DMB signal transmitted as described above includes a SYNC, a fast information channel (FIC), and an MSC. The SYNC includes NULL and each channel into which a TII signal is inserted, as described later. It consists of PRS to distinguish.

The FIC constitutes a list of MSCs as header information of a frame, and the MSCs insert content provided by the service provider 300.

In the present embodiment, the pay service for the terrestrial DMB service is provided, but the pay service for the free broadcast may be provided.

In step S402, when the relay station of the terrestrial DMB pay service system 10 determines whether the transmission section of the DMB signal is a toll section and determines that it is a free section, that is, the relay station is the first relay station 450 that supports the free service. In this case, a general terrestrial DMB free service is performed, specifically, the DMB signal received from the transmitting station 400 is relayed and transmitted into the service area.

At this time, the terminal capable of receiving DMB located in the service area of the first relay station 450, for example, a DMB receiving terminal 200a, a mobile telephone 200b having a DMB receiving function, and a DMB receiver provided in a vehicle. 200c may receive and watch a DMB signal.

As a result of the determination in step S402, when the relay station of the terrestrial DMB pay service system 10 determines whether the transmission section of the DMB signal is a pay section, and determines that it is a pay section, that is, the second relay station 500 that supports the pay service by the relay station 500. ), The process proceeds to step S403 and receives the KEY for the paid service from the communication network 600 to which the paid subscriber terminal 100 is subscribed.

In step S404, the second relay station 500 encrypts the PRS of the DMB signal frame using the TII for the corresponding relay network and the KEY received from the communication network 600.

Here, the KEY is transmitted by the operator providing the DMB paid service, for example, the operator of the communication network 600 to which the paid subscriber terminal 100 is subscribed through the communication network 600, which is paid for the area where wireless reception is impossible. It is used to transform a frame of a DMB signal to provide a service.

In this embodiment, the PRS of the DMB signal frame is encrypted. However, in the case of free broadcasting, channel analysis information corresponding to the PRS may be encrypted.

In addition, the TII is inserted by the second relay station 500 into the NULL of the DMB signal frame and used to encrypt the PRS of the frame together with the KEY.

By converting the DMB signal frame by KEY and TII, it is possible to provide a new type of Network Identification System (NIS) that supports toll service for a specific region and maintains compatibility with a free service network.

In step S405, the frame of the DMB signal is changed, and the TII of the relay network is inserted into the frame of the DMB signal and transmitted.

That is, the second relay station 500 inserts the TII used for the encryption of the PRS into the NULL section of the DMB frame, transforms the DMB frame to include the encrypted PRS, and sends the same to the service area.

Here, the signal transmitted from the second relay station 500 may also receive free subscriber terminals 200a to 200c existing in the service area of the second relay station 500, but the free subscriber terminals 200a to 200c may receive DMB signals. Since it does not receive the KEY to interpret the encrypted PRS of, it cannot demodulate the DMB signal and therefore cannot view the DMB content.

Such steps S403 to S405 are performed by a second relay station 500 such as a galler, and the second relay station 500 encrypts the PRS of the DMB signal using the TII for the corresponding relay network, and the frame of the DMB signal. By reconstructing and transmitting, it is possible to provide a terrestrial DMB paid service for areas where radio reception is impossible.

Meanwhile, the paying subscriber terminal 100 existing in the service area of the second relay station 500 receives the DMB signal transmitted as described above and interprets the PRS using the TII included in the reconstructed frame of the DMB signal. The terrestrial DMB paid service can be provided.

Hereinafter, the procedure of the paying subscriber terminal 100 side of the terrestrial DMB pay service providing method will be described.

As shown in FIG. 5, in step S501, a DMB signal received from the second relay station 500 is received.

In step S502, if it is determined that there is no TII in the frame of the received DMB signal, that is, it is determined that there is no TII, that is, if the paying subscriber terminal 100 exists in the service area of the first relay station 450, the received DMB is received. The content is viewed using the default PRS included in the frame of the signal.

As a result of the determination in step S502, if it is determined that there is a TII in the frame of the received DMB signal, that is, if the paying subscriber terminal 100 exists in the service area of the second relay station 500, the process proceeds to step S503 and is received. TII is extracted from the frame of the DMB signal.

Here, TII is extracted from NULL of the DMB signal frame, which is the corresponding relay network TII of the second relay station 500.

In step S504, the KEY for the paid service is received from the communication network 600.

That is, the paid subscriber terminal 100 is a communication network 600 from the operator providing the DMB paid service, for example, the operator of the communication network 600 to which the paid subscriber terminal 100 is subscribed in order to interpret the PRS of the received frame. Receive KEY through.

In step S505, the CW is generated by using the TII extracted from the frame of the KEY and the DMB signal received through the communication network 600.

This CW is generated by the algorithm in CAS 150, which is intended to interpret the encrypted PRS contained in the received DMB frame.

In step S506, the encrypted PRS of the received DMB signal is analyzed using the generated CW.

Here, the free subscriber terminals 200a to 200c existing in the service area of the second relay station 500 also receive the DMB signal, but cannot demodulate the DMB signal because they cannot generate CW for interpreting the encrypted PRS. .

In step S507, the corresponding content is extracted from the frame of the DMB signal received through the analyzed PRS.

That is, the corresponding content stored in the MSC of the DMB frame may be extracted through the analyzed PRS, and the corresponding content may be viewed through the voice output unit 182 and the image output unit 184.

As described above, in the paid service providing method of free broadcasting according to the present invention, a frame of a broadcast signal is modified for a specific region, and a broadcast frame is transmitted using a key provided by a service provider and a TII of a specific regional network. If the channel analysis information is encrypted and transmitted, the mobile communication terminal subscribed to the paid service decodes the channel analysis information by using KEY and TII, so that it can operate independently while maintaining compatibility with the broadcasting free service network. It has the effect of providing a net.

Claims (7)

Determining, by the relay station of the free broadcasting system, whether the transmission section of the broadcasting signal is a pay section; Transmitting, by the relay station, encrypting channel analysis information of the broadcast signal using TII (Transmitter Identification Information) for the corresponding relay network and reconstructing and transmitting a frame of the broadcast signal when the paid section is a paid period; A receiving step of receiving, by the mobile communication terminal subscribed to the pay service, the received broadcast signal, decrypting the channel analysis information by using the TII included in the reconstructed frame of the broadcast signal, and receiving the corresponding content. Paid service providing method of the free broadcast, characterized in that made. The method of claim 1, The transmitting step, Receiving a first KEY for receiving a KEY for a paid service from a communication network to which the mobile communication terminal is subscribed; Encrypting the channel analysis information by using the TII and the KEY for the corresponding relay network; And a step of inserting the TII into the frame by changing the frame of the broadcast signal. The method of claim 2, The receiving step, An extraction step of extracting the TII from the frame by receiving a broadcast signal whose frame is changed; Receiving a second KEY for receiving the KEY for a paid service from the communication network; A generation step of generating a control word (CW) using the received KEY and the extracted TII; Decrypting the encrypted channel analysis information of the received broadcast signal using the generated CW; And extracting the content from the frame of the received broadcast signal through the decrypted channel analysis information. The method of claim 3, wherein The generating step is a free service pay service providing method characterized in that for generating the CW by using a CAS (Conditional Access System) algorithm. The method of claim 1, If it is determined in the determination step that the free section, A relay step of the base station relaying and transmitting a broadcast signal received from a transmitting station; And a viewing step of receiving, by the mobile communication terminal, the broadcast signal and viewing the corresponding content by using channel analysis information included in the broadcast signal. The method according to any one of claims 1 to 5, The free broadcast is a terrestrial DMB pay service providing method characterized in that the DMB. The method of claim 6, The channel analysis information is a paid service providing method of a free broadcast, characterized in that the PRS (Phase Reference Symbol) of the DMB signal.

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