KR100695082B1 - Conditional Access System and Method Using Position Information of Mobile Communication Terminal and Mobile Communication Terminal therefor - Google Patents

Abstract

The present invention relates to a reception restriction system using location information of a mobile communication terminal.

The system of the present invention comprises an ECM generation unit for generating a credential control message (ECM) including a control word (CW) used for broadcasting program data encryption and reception credential information for each channel / program, an encryption key of the credential control message, And a smart card for extracting a control word (CW) by using the entitlement control message and the entitlement management message, comprising a CAS server including an EMM generation unit for generating an entitlement management message (EMM) including subscriber entitlement viewing information. In a reception restriction system (CAS) for limiting a multimedia broadcasting reception entitlement of a mobile communication terminal by allowing a mobile communication terminal to perform broadcast program data decoding using the control word, the ECM generation unit may move the smart card. By comparing the location information of the communication terminal with the reception / restriction area information of the program / channel Entitlement control message including one or more location block information including latitude / longitude value for indicating reception / restriction area as reception credential information for each program / channel to determine whether to allow / restrict the reception of the mobile communication terminal. There is a technical feature in creating a.

Description

Restriction system and method using location information of mobile communication terminal and mobile communication terminal for same {Conditional Access System and Method Using Position Information of Mobile Communication Terminal and Mobile Communication Terminal therefor}

1 is a structural diagram of a reception restriction system according to an embodiment of the present invention;

2 is a view for explaining a positional representation method according to an embodiment of the present invention;

3 is a flowchart illustrating a reception restriction method according to an embodiment of the present invention.

<Description of Symbols for Main Parts of Drawings>

10: scrambler 20: CW generator

30: subscriber management system 40: multiplexing device

100: CAS server 110: ECM generation unit

120: EMM generating unit 200: mobile communication terminal

210: demultiplexer 220: descrambler

230: smart card 240: location information acquisition unit

250: broadcast playback device

The present invention relates to a system and method for receiving restriction using location information of a mobile communication terminal and a mobile communication terminal for the same. More particularly, the present invention relates to a qualification control message or a mobile terminal for providing a paid broadcasting service through restriction of a reception area. The location of the mobile communication terminal which includes the reception allowance / restriction area information in the entitlement management message and transmits it, and grants the broadcasting viewing qualification when the mobile communication terminal which received it compares the current location information with the received information and is a valid subscriber. The present invention relates to a reception limitation system and method using information and a mobile communication terminal for the same.

Digital Multimedia Broadcasting (DMB) service is a mobile multimedia broadcasting service that combines broadcasting and communication. It provides CD-quality sound, data, and high-definition video through mobile phones, personal digital assistants (PDAs), and vehicle terminals. It is a digital broadcasting service that provides a service, and is classified into a satellite DMB that receives radio waves through a broadcast satellite and a terrestrial DMB that receives radio waves through a terrestrial transmission station on the top of Namsan or Gwanak Mountain.

At present, digital multimedia broadcasting to mobile communication terminal is under trial service, and this broadcasting service will be provided soon. When digital multimedia broadcasting service is provided, mobile communication subscribers can watch drama or high-quality music using mobile communication terminal even in subway or bus. You can listen to information, such as news, weather, stock quotes can always receive information while watching the broadcast, and the title or lyrics of the music you are listening to as captions or photos, attracting the attention of mobile subscribers.

On the other hand, most of these digital multimedia broadcasting will be provided as a paid service, and therefore, the mobile communication terminal must have a conditional access system (CAS) which is a download security solution for selectively providing broadcast programs to subscribers. Should be adopted.

Restriction Control System (CAS) is a system that allows only paid subscribers to watch paid broadcasts, and is a key solution for paid broadcasters such as satellite and cable broadcasts and terrestrial broadcasters that are currently set free but are likely to be paid. .

The general reception restriction system (hereinafter referred to as CAS) is as follows.

When contents such as video, audio, and data are supplied from program providers (PPs), information about the contents is also supplied, and the work on PPV, NVOD, IPPV, relay channel, etc. is scheduled and scheduled through the information. The information and CW (Control Word) information from the scrambler are linked to generate an ECM and an EMM encrypted in the CAS.

An Entitlement Control Message (ECM) is an entitlement control message used for content protection. The ECM generator receives program information and package information from a broadcast schedule generator to generate an ECM. The Entitlement Management Message (EMM) is an entitlement management message used for subscriber authentication. The EMM generator generates an EMM by receiving subscriber information and purchase information from the subscriber management system.

The ECM and EMM generated as described above are transmitted to the multiplexer, and the video / audio is multiplexed with the compressed stream and sent to the receiver of the home. In the home, the ECM and EMM are embedded in the set top box (STB) for messages such as ECM and EMM. Decompress / multiplex and encrypt multiplexed video, audio, and data through receiver CA software, which performs authentication and filtering, and mutual authentication between smart cards and receivers, but does not support PPV, NVOD, IPPV, and paid packages. Paid services have restrictions on use depending on the credit card status of the smart card.

A smart card is a card with a chip that has its own processor and memory provided to subscribers for satellite broadcasting. The receiver finds the CW required for decryption through the smart card. Only the right subscriber can access the set-top box by EMM. Is allowed.

Meanwhile, the conventional CAS is a system applied to a terminal (receiver) having a structure in which a broadcast set-up device such as a TV is connected to a fixed set top box (STB), and is suitable for a mobile communication terminal in which digital multimedia broadcasting service is to be implemented soon. CAS development and implementation of a new mechanism is required.

Accordingly, the present invention is to solve the above-mentioned disadvantages and problems of the prior art, a reception limitation system using the location information of the mobile communication terminal to limit the digital multimedia broadcasting service according to the location of the mobile communication terminal and It is an object of the present invention to provide a method and a mobile communication terminal for the same.

The above object of the present invention is a message transmitted together with a broadcast program encrypted with a control word (CW) transmitted to a mobile communication terminal through a broadcasting network, and received by the control word (CW) and channel / program used for encrypting broadcast program data. CAS including an ECM generation unit for generating an entitlement control message (ECM) including entitlement information, and an EMM generation unit for generating an entitlement management message (EMM) including an encryption key of the entitlement control message and viewing entitlement information for each subscriber. A mobile communication terminal having a server and having a smart card extracting a control word (CW) using the entitlement control message and the entitlement management message allows the mobile communication terminal to decode broadcast program data using the control word. A reception restriction system (CAS) for limiting the multimedia broadcasting reception qualification of CM generation unit, so that the smart card to compare the location information of the mobile communication terminal and the reception allowance / restriction area information of the program / channel to determine whether to allow or limit the reception of the mobile communication terminal, reception qualification information for each program / channel As an example, the apparatus may be achieved by a reception restriction system using location information of a mobile communication terminal that generates an entitlement control message including one or more location block information including latitude / longitude values for indicating a reception allowance / restriction area.

In addition, the above object of the present invention is a message transmitted together with a broadcast program encrypted with a control word (CW) transmitted to a mobile communication terminal through a broadcast network, and a control word (CW) and a channel / program used for encrypting broadcast program data. An ECM generation unit for generating an entitlement control message (ECM) including the per-receipt entitlement information, and an EMM generation unit for generating an entitlement management message (EMM) including the encryption key of the entitlement control message and the viewing entitlement information for each subscriber. And a mobile communication terminal having a smart card for extracting a control word (CW) by using the entitlement control message and the entitlement management message to perform broadcast program data decryption using the control word. In the reception restriction system (CAS) for limiting the multimedia broadcasting reception qualification of the communication terminal, The EMM generation unit allows the smart card to be received as subscriber's reception entitlement information so as to determine whether to allow / restrict the reception of the mobile communication terminal by comparing the location information of the mobile communication terminal with the reception allowance / restriction area information of the subscriber. Is achieved by a reception restriction system using location information of a mobile communication terminal generating a credential management message including one or more location block information including latitude / longitude values for indicating a / restricted area.

In addition, the above object of the present invention is the entitlement control message (ECM) and entitlement control message including broadcast program data encrypted with a control word (CW), control word (CW), and channel / program reception entitlement information to a mobile communication terminal. A smart card for extracting a control word (CW) using the credential control message and the credential management message when an credential management message (EMM) including an encryption key of the subscriber and viewing credential information for each subscriber is received; A descrambler for decoding the encrypted broadcast program data into a control word (CW) received from the smart card and transmitting the decrypted broadcast program data to a broadcast reproducing apparatus; In the mobile communication terminal comprising a, the entitlement control message, one or more of the location block information including a latitude / longitude value for indicating the reception allowance / restricted region as the reception entitlement information for each program / channel, The mobile communication terminal, at the request of the smart card location information acquisition unit for obtaining the latitude / longitude value indicating the current position of the own and transmit to the smart card; Wherein the smart card receives the current location information of the mobile communication terminal through the location information acquisition unit, compares the received current location information with the latitude / longitude value in the entitlement control message, and corresponds to the mobile communication terminal. Is determined by a mobile communication terminal which determines whether or not it is within a reception allowable area and delivers a control word in the entitlement control message to the descrambler when within a reception allowance area.

In addition, the above object of the present invention is an entitlement control message (ECM) and entitlement control message including broadcast program data encrypted with a control word (CW), a control word (CW), and channel / program reception entitlement information to a mobile communication terminal. A smart card for extracting a control word (CW) using the credential control message and the credential management message when an credential management message (EMM) including an encryption key of the subscriber and viewing credential information for each subscriber is received; A descrambler for decoding the encrypted broadcast program data into a control word (CW) received from the smart card and transmitting the decrypted broadcast program data to a broadcast reproducing apparatus; In the mobile communication terminal comprising a, the credential management message includes one or more location block information including a latitude / longitude value for indicating the reception allowance / restricted region as the reception qualification information for each subscriber, the mobile communication The terminal may include: a location information obtaining unit obtaining and transmitting a latitude / longitude value indicating a current location of the smart card according to a request of the smart card to the smart card; The smart card receives the current location information of the mobile communication terminal through the location information acquisition unit, compares the received current location information with the latitude / longitude value in the credential management message, and corresponds to the mobile communication terminal. Is determined by a mobile communication terminal which determines whether or not it is within a reception allowable area and delivers a control word in the entitlement control message to the descrambler when within a reception allowance area.

The above object of the present invention is a message transmitted together with a broadcast program encrypted with a control word (CW) transmitted to a mobile communication terminal through a broadcast network, and a control word (CW) and a channel / program used for encrypting broadcast program data. And a CAS server for generating an entitlement control message (ECM) including the respective entitlement information and an entitlement management message (EMM) including the encryption key of the entitlement control message and the subscriber entitlement viewing information. Restriction of reception for restricting the multimedia broadcasting reception qualification of the mobile communication terminal by allowing the mobile communication terminal having a smart card to extract the control word (CW) by using the entitlement management message to perform broadcast program data decoding using the control word. A method of restricting reception in a system, wherein the CAS server is programmed. A first step of / generating one or more position information block, including latitude / longitude values that indicate a reception enable / disable a local channel reception entitlement information by; Generating a credential control message including the generated at least one location block information and a control word (CW); It is achieved by a reception restriction method using the location information of the mobile communication terminal comprising a.

In addition, the above object of the present invention is a message transmitted together with a broadcast program encrypted with a control word (CW) transmitted to a mobile communication terminal through a broadcast network, and a control word (CW) and a channel / program used for encrypting broadcast program data. And a CAS server for generating an entitlement control message (ECM) including the respective entitlement information and an entitlement management message (EMM) including the encryption key of the entitlement control message and the subscriber entitlement viewing information. Restriction of reception for restricting the multimedia broadcasting reception qualification of the mobile communication terminal by allowing the mobile communication terminal having a smart card to extract the control word (CW) by using the entitlement management message to perform broadcast program data decoding using the control word. A method of restricting reception in a system, wherein the CAS server is configured for each subscriber. Generating at least one location block information including latitude / longitude values for indicating reception / restriction areas as reception qualification information; Generating a credential management message including the generated at least one location block information and an encryption key of the credential control message; It is achieved by a reception restriction method using the location information of the mobile communication terminal comprising a.

In addition, the above object of the present invention is the entitlement control message (ECM) and entitlement control message including broadcast program data encrypted with a control word (CW), control word (CW), and channel / program reception entitlement information to a mobile communication terminal. A smart card for extracting a control word (CW) using the credential control message and the credential management message when an credential management message (EMM) including an encryption key of the subscriber and viewing credential information for each subscriber is received; A descrambler for decoding the encrypted broadcast program data into a control word (CW) received from the smart card and transmitting the decrypted broadcast program data to a broadcast reproducing apparatus; And a location information acquisition unit for obtaining a latitude / longitude value indicating its location information. A method of limiting reception in a mobile communication terminal, comprising: one or more location block information including latitude / longitude values indicating a reception allowance / restricted area as reception qualification information for each program / channel to the smart card; Receiving a qualification control message, requesting latitude / longitude information indicating a current location of a mobile communication terminal to the location information obtaining unit; When the latitude / longitude information is received from the location information acquisition unit, the received latitude / longitude information is compared with the latitude / longitude value in the entitlement control message to determine whether the mobile communication terminal is within the reception allowance area. Step 2; A third step of providing a control word in the entitlement control message to the descrambler to decode the broadcast program data using the control word by the descrambler when it is within a reception allowable area; It is achieved by a reception restriction method using the location information of the mobile communication terminal comprising a.

In addition, the above object of the present invention is an entitlement control message (ECM) and entitlement control message including broadcast program data encrypted with a control word (CW), a control word (CW), and channel / program reception entitlement information to a mobile communication terminal. A smart card for extracting a control word (CW) using the credential control message and the credential management message when an credential management message (EMM) including an encryption key of the subscriber and viewing credential information for each subscriber is received; A descrambler that decrypts the encrypted broadcast program data into a control word (CW) received from the smart card and transmits the decrypted broadcast program data to a broadcast reproducing apparatus; And a location information acquisition unit for obtaining a latitude / longitude value indicating its location information. A method of restricting reception in a mobile communication terminal, comprising: one or more location block information including latitude / longitude values indicating a reception allowance / restricted area as reception qualification information for each subscriber by the smart card; Receiving a message, requesting latitude / longitude information indicating a current location of a mobile communication terminal to the location information acquisition unit; When the latitude / longitude information is received from the location information acquisition unit, the received latitude / longitude information is compared with the latitude / longitude value in the credential management message to determine whether the mobile communication terminal is within the reception allowance area. Step 2; A third step of providing a control word in the entitlement control message to the descrambler to decode the broadcast program data using the control word by the descrambler when it is within a reception allowable area; It is achieved by a reception restriction method using the location information of the mobile communication terminal, characterized in that comprises a.

Details of the above object and technical configuration of the present invention and the resulting effects thereof will be more clearly understood from the following detailed description based on the accompanying drawings.

First, FIG. 1 is a structural diagram of a reception restriction system according to an embodiment of the present invention, and FIG. 2 is a view for explaining a positional expression method according to an embodiment of the present invention.

The restriction system (CAS) of the present invention includes a CAS server 100, and the reception restriction system (CAS) is again included in a system for transmitting digital multimedia broadcasting.

The CAS server 100 generates an entitlement control message (ECM) and an entitlement management message (EMM), which are messages transmitted together with an encrypted broadcast program transmitted to a mobile communication terminal through a broadcasting network, and an EMM. It is made of a generation unit 120.

The ECM generator 110 receives the control word from the CW generator 20 generating a control word CW for encrypting broadcast program data provided from the program provider PP to the scrambler 10, and receives the received control word. Generates a credential control message (ECM) including one or more location block information including latitude / longitude values indicating a word / CW and channel / program receiving credential information to indicate an allowable / restricted region. Transmit to 40.

The EMM generation unit 120 is interworked with the subscriber management system 30 that is in charge of entitlement management for each subscriber, and the latitude / longitude for indicating the reception / restriction area as the encryption key of the entitlement control message and the viewing entitlement information for each subscriber. A credential management message (EMM) including one or more location block information including a value is generated and transmitted to the multiplexing device 40.

The scrambler 10 encrypts (scrambles) broadcast program data using the control word generated from the CW generator 20 and transmits the scrambler 10 to the multiplexing device 40. The multiplexing device 40 includes the encrypted broadcast program data, The entitlement control message and the entitlement management message are multiplexed and transmitted to the mobile communication terminal 200 which is a receiver.

Meanwhile, although the entitlement control message and the entitlement management message are both multiplexed through the multiplexing device 40 and transmitted to the mobile communication terminal 200, the CAS server ( 100) may individually transmit the entitlement management message, which is a control message for each subscriber, for each subscriber through the mobile communication network.

The demultiplexer 210 of the mobile communication terminal 200 receives the multiplexed signal and demultiplexes the encrypted broadcast program data, the entitlement control message (ECM) and the entitlement management message (EMM), and encrypts the broadcast program data. The descrambler 220 transmits the entitlement control message and the entitlement management message to the smart card 230.

If the qualification management message is separately received through the mobile communication network, as described above, the demultiplexer 210 may receive and demultiplex only the broadcast program data and the qualification control message.

The smart card 230 determines whether to allow / restrict the reception using the qualification restriction information in the credential control message or the credential management message. When the reception is permitted, the smart card 230 generates a control word CW to the descrambler 220. The present invention compares the current location information of the mobile communication terminal 200 with latitude / longitude values in the entitlement control message or the entitlement management message to determine whether the mobile communication terminal 200 is within the reception allowance area. Determine whether or not.

At this time, in consideration of the mobility of the mobile communication terminal 200, the smart card 230 determines whether or not it is within the reception allowance area according to a time point at which broadcast viewing is started, a time point at which a broadcast channel is changed, or a predetermined period. You will have to make a new judgment.

The descrambler 220 decodes the broadcast program data using the control word transmitted from the smart card 230, and transmits the decoded program data to the broadcast reproducing apparatus 250 so that the subscriber can watch the broadcast.

Meanwhile, the reception allowance / restriction zone representation scheme in the reception restriction system of the present invention will be described with reference to FIG. 2.

The area of the reception allowance area or the reception restriction area may be expressed in various ways. As an embodiment, the location block information may be represented by a rectangle, a circle, an ellipse, and the like through a combination of a plurality of location block information and a difference. Complex location can be represented.

In this case, the location block information may be a block type indicating a representation type (rectangle, circle, oval, etc.) of the reception allowance / restriction area, PN identification information for distinguishing the reception allowance and the reception restriction area, and the reception permission. Includes count information (N) representing the number of parameter values required to determine the restricted area and each parameter value.

If a region is to be represented by a rectangle, as shown in FIG. 2, latitude / longitude values representing the upper left corner ① of the rectangle and latitude / longitude values representing the lower right corner ② may be used. have.

In this case, when there is one reception area and one reception restriction area for a specific program or for a specific subscriber, the credential management message or the credential control message is two location block information, that is, <Rectangle, Positive, (X1, Y1), (X2, Y2)> and <Rectangle, Negative, (X3, Y3), (X4, Y4)>.

Receiving the above position block information, the smart card 230 includes a rectangular reception allowance area having (X1, Y1) and (X2, Y2) as the upper left and lower right points, and the (X3, Y3) and (X4). , Y4) can also find a rectangular reception restriction area having the upper left point and the lower right point, and calculate the difference between the reception permission area and the reception restriction area to determine the final reception permission area or the reception restriction area.

That is, in the present invention, the smart card 230 sets the range of the reception allowance / restriction zone according to the location block information, and the union of each reception allowance zone (when there are a plurality of reception allowance zones) and the union of the reception restriction zone. Calculate (if there are multiple reception restricted areas) and calculate the difference between the two unions to determine the final reception / restriction area.

If the union of the reception blocks is called A, and the union of the reception blocks is B, then, in the case where it is desired to specify a region to be allowed to view, the difference AB of the reception block A minus the reception restriction B is determined. If you want to be able to receive only the terminals in the area, and you want to specify the area where you want to finally limit the viewing, obtain the difference BA from the reception restriction set B minus the allowable set A. To make it possible.

On the other hand, when the block type is circular, the location block information is a parameter value for expressing the reception allowance / restriction area in a circle, and the latitude / longitude value indicating the center of the circle representing the reception allowance / restriction area and the radius are shown. It can include either a latitude value or a longitude value that allows the distance value to be represented or the size of the circle to be determined.

In addition, when the block type is elliptical, the location block information is a parameter value for expressing the reception allowance / restriction area as an ellipse, and the latitude / longitude value indicating the center of the circle indicating the reception allowance / restriction area and two ellipses. It can include two distance values representing a radius, or two latitude / longitude values.

Meanwhile, in order to compare the location information, which is the received qualification information in the entitlement control message or the entitlement management message, with the current location information of the mobile communication terminal 200, the mobile communication terminal 200 uses the location information acquisition unit 240 in the present invention. Include.

The location information acquisition unit 240 obtains a latitude / longitude value indicating a current location of the user according to the request of the smart card 230 and transmits the location information to the smart card. The smart card 230 is the location information acquisition unit 240. Receive current location information of the mobile communication terminal, and compare the received current location information with a latitude / longitude value in the entitlement control message.

In this case, when the mobile communication terminal includes a GPS receiver (not shown), the location information acquisition unit 240 acquires latitude / longitude coordinates of the current location by using the GPS receiver and does not include a GPS receiver. For example, the latitude / longitude value of an adjacent base station is transmitted to the smart card 230. Here, the adjacent base station may be a base station closest to the mobile communication terminal 200 or a base station holding a pilot channel.

Next, FIG. 3 is a flowchart illustrating a reception restriction method according to an embodiment of the present invention, and the operation of the reception restriction system of the present invention described above will be described as follows.

As shown, the CAS server 100 of the present invention generates location block information indicating a reception / restriction area for channel / program location-based reception restriction or subscriber-based location information-based reception restriction ( S101).

As described above, the location block information determines a block type indicating a representation of a reception / restriction area, PN identification information for distinguishing a reception reception area and a reception restriction area, and a reception reception / restriction area. It includes the number information indicating the number of parameter values required to make and each parameter value.

Next, the ECM generator 110 or the EMM generator 120 of the CAS server 100 generates an entitlement control message (ECM) or entitlement management message (EMM) including the location block information (S102). In operation S103, the generated message is transmitted to the mobile communication terminal 200 through the multiplexing device 40 together with the broadcast program data encrypted with the control word.

In this case, in the case of the entitlement management message, the CAS server 100 may transmit each subscriber individually through a mobile communication network.

Next, when the smart card 230 of the mobile communication terminal 200 receives the entitlement control message and the entitlement management message from the demultiplexing device 210, the location block information included in the entitlement management message or the entitlement control message and the location of the terminal. The information is compared (S104), and it is determined whether or not it is within a reception allowance area (S105).

As a result of determination, the smart card 230 transmits the control word in the entitlement control message to the descrambler 220 of the mobile communication terminal 200, and the descrambler 220 uses the control word. The program data are decoded to be transmitted to the broadcast reproducing apparatus 250 (S106).

On the other hand, the steps S104 and S105 will be described in more detail as follows.

Restriction of digital multimedia broadcasting can be restricted by program / channel and by subscriber. Restriction information can be provided in the entitlement control message for program / channel restriction and in the entitlement management message for subscriber restriction. Position block information indicating is included.

When the smart card 230 of the mobile communication terminal 200 receives a credential management message or credential control message including one or more location block information including latitude / longitude values for indicating a reception allowance / restriction area, The acquirer 240 acquires latitude / longitude information indicating the current location of the mobile communication terminal (terminal location or base station location using GPS).

The smart card 230 sets a range of the allowable / restricted areas according to one or more location block information included in the message, calculates the union of each of the allowable areas and the union of the restricted areas, and calculates the union of the two unions. The difference is calculated to determine the final reception / limit area.

That is, if the union of the reception blocks is called A, and the union of the reception blocks is B, the difference AB obtained by subtracting the reception restriction B is subtracted from the reception union A if the final destination is to be viewed. If you want to be able to receive only the terminals in the area, and you want to specify the area where you want to finally limit the viewing, obtain the difference BA from the reception restriction set B minus the allowable set A. To make it possible.

Since the location representation method using the location block information has been described with reference to FIG. 2, a detailed description thereof will be omitted.

Next, the smart card 230 compares the determined final reception allowance / restriction area with the current location information of the mobile communication terminal to determine whether the mobile communication terminal is within the reception allowance area.

As those skilled in the art to which the present invention pertains may implement the present invention in other specific forms without changing the technical spirit or essential features, the embodiments described above should be understood as illustrative and not restrictive in all aspects. Should be. The scope of the present invention is shown by the following claims rather than the detailed description, and all changes or modifications derived from the meaning and scope of the claims and their equivalents should be construed as being included in the scope of the present invention. do.

Therefore, according to the reception limitation system and method using the location information of the mobile communication terminal of the present invention and the mobile communication terminal therefor, the location-based restriction of the digital multimedia broadcasting service can be efficiently achieved by using the location information of the mobile communication terminal. It works.

Claims (34)

A message transmitted together with a broadcast program encrypted with a control word (CW) transmitted to a mobile communication terminal through a broadcast network, and includes a control word (CW) used for encrypting broadcast program data and receiving qualification information for each channel / program. And a CAS server including an ECM generation unit for generating a control message (ECM) and an EMM generation unit for generating an entitlement management message (EMM) including an encryption key of the entitlement control message and viewing entitlement information for each subscriber. The mobile communication terminal having a smart card extracting a control word (CW) using the entitlement control message and the entitlement management message allows the mobile communication terminal to decode broadcast program data by using the control word. In a restrictive reception restriction system (CAS), The ECM generation unit, in order to determine whether to allow / restrict the reception of the mobile communication terminal by comparing the location information of the mobile communication terminal with the reception permission / restriction area information of the program / channel, the smart card generation qualification Generate an entitlement control message that includes one or more location block information as an information to indicate an acceptable / restricted region; The location block information, Includes block type indicating the representation of the allowed / restricted area, PN identification information to distinguish between positive and restricted areas, and latitude / longitude information required to determine the allowed / restricted area. Reception restriction system using the location information of the mobile communication terminal, characterized in that it comprises a parameter value. A message transmitted together with a broadcast program encrypted with a control word (CW) transmitted to a mobile communication terminal through a broadcast network, and includes a control word (CW) used for encrypting broadcast program data and receiving qualification information for each channel / program. And a CAS server including an ECM generation unit for generating a control message (ECM) and an EMM generation unit for generating an entitlement management message (EMM) including an encryption key of the entitlement control message and viewing entitlement information for each subscriber. The mobile communication terminal having a smart card extracting a control word (CW) using the entitlement control message and the entitlement management message allows the mobile communication terminal to decode broadcast program data by using the control word. In a restrictive reception restriction system (CAS), The EMM generation unit allows the smart card to be received as subscriber's reception entitlement information so as to determine whether to allow / restrict the reception of the mobile communication terminal by comparing the location information of the mobile communication terminal with the reception allowance / restriction area information of the subscriber. Generate entitlement management messages containing one or more location block information to indicate a restricted area, The location block information, Includes block type indicating the representation of the allowed / restricted area, PN identification information to distinguish between positive and restricted areas, and latitude / longitude information required to determine the allowed / restricted area. Reception restriction system using the location information of the mobile communication terminal, characterized in that it comprises a parameter value. The method according to claim 1 or 2, The CAS server, System for receiving restriction using location information of a mobile communication terminal, characterized in that for transmitting the entitlement management message (EMM) for each subscriber individually through a mobile communication network. The method according to claim 1 or 2, The location block information, The reception restriction system using location information of the mobile communication terminal, further comprising number information indicating the number of parameter values. The method according to claim 1 or 2, The block type is a reception restriction system using location information of a mobile communication terminal, characterized in that any one of a rectangle, a circle, an oval. The method of claim 5, When the block type is a quadrangle, the location block information is a parameter value representing a reception / restriction area in a quadrangle, and a latitude / longitude value of one top of a rectangle indicating a reception / restriction area and a bottom of the other side of the rectangle. Reception restriction system using the location information of the mobile communication terminal, characterized in that it comprises a latitude / longitude value. The method of claim 5, When the block type is circular, the location block information is a parameter value for representing a reception allowance / restriction area in a circle, and a latitude / longitude value indicating a center of a circle indicating a reception allowance / restriction area and a distance indicating a radius. Reception restriction system using the location information of the mobile communication terminal, characterized in that it comprises a value. The method of claim 5, When the block type is circular, the location block information is a parameter value for representing a reception allowance / restriction area in a circle, and a latitude / longitude value indicating a center of a circle indicating a reception allowance / restriction area and a latitude indicating a radius. Reception restriction system using the location information of the mobile communication terminal, characterized in that it comprises one of a value and a longitude value. The method of claim 5, When the block type is elliptical, the location block information is a parameter value for representing the reception allowance / restriction area as an ellipse, latitude / longitude value indicating the center of a circle indicating the reception allowance / restriction area, and two radiuses of an ellipse. Reception restriction system using the location information of the mobile communication terminal, characterized in that it comprises two distance values indicating. The method of claim 5, When the block type is elliptical, the location block information is a parameter value for representing the reception allowance / restriction area as an ellipse, latitude / longitude value indicating the center of a circle indicating the reception allowance / restriction area, and two radiuses of an ellipse. Reception restriction system using the location information of the mobile communication terminal, characterized in that it comprises two latitude / longitude value representing. Encrypted control message (ECM) including broadcast program data encrypted with control word (CW), control word (CW) and channel / program reception entitlement information to mobile communication terminal, and encryption key of entitlement control message and subscriber's viewing entitlement A smart card for extracting a control word (CW) using the credential control message and the credential management message when an credential management message (EMM) including information is received; A descrambler for decoding the encrypted broadcast program data into a control word (CW) received from the smart card and transmitting the decrypted broadcast program data to a broadcast reproducing apparatus; In the mobile communication terminal comprising a, The entitlement control message is reception entitlement information for each program / channel. PN identification information and reception allowance for distinguishing a block type indicating a reception / restriction area, a reception area and a reception restriction area (Negative) are shown. Includes one or more location block information including parameter values including latitude / longitude information needed to establish a restricted area, The mobile communication terminal, at the request of the smart card location information acquisition unit for obtaining a latitude / longitude value indicating the current location of the own and transmits to the smart card; Including; The smart card sets a range of a reception allowance / restriction area using location block information in the entitlement control message, and the mobile communication terminal sets the reception reception area according to the location information received through the location information acquisition unit. Determining whether or not to be within a range, and transmitting the control word in the entitlement control message to the descrambler when it is within a reception allowance area. The method of claim 11, The smart card, And determining whether or not the mobile communication terminal is located within the set allowable reception area at the time point of watching a broadcast. The method of claim 11, The smart card, And determining whether the mobile communication terminal is located within the set allowable reception area at a time point when a broadcasting channel is changed. The method of claim 11, The smart card, And determining whether the mobile communication terminal is located within the set allowable area range repeatedly at a predetermined period. Encrypted control message (ECM) including broadcast program data encrypted with control word (CW), control word (CW) and channel / program reception entitlement information to mobile communication terminal, and encryption key of entitlement control message and subscriber's viewing entitlement A smart card for extracting a control word (CW) using the credential control message and the credential management message when an credential management message (EMM) including information is received; A descrambler for decoding the encrypted broadcast program data into a control word (CW) received from the smart card and transmitting the decrypted broadcast program data to a broadcast reproducing apparatus; In the mobile communication terminal comprising a, The entitlement management message includes one or more location block information including a latitude / longitude value for indicating an allowable / restricted area as reception entitlement information for each subscriber. The mobile communication terminal, at the request of the smart card location information acquisition unit for obtaining a latitude / longitude value indicating the current location of the own and transmits to the smart card; Including; The smart card receives the current location information of the mobile communication terminal through the location information acquisition unit, compares the received current location information with the latitude / longitude value in the entitlement management message, so that the mobile communication terminal is within the reception allowance area. And determining whether there is an error, and transmitting the control word in the entitlement control message to the descrambler when it is within a reception allowance area. The method of claim 11 or 15, The location block information, Block type indicating the representation of the allowable / restricted area, PN identification information for distinguishing the positive and restricted areas, and the number of parameter values required to determine the allowable / restricted area. Includes count information and each parameter value, The smart card sets a range of the reception allowance / restriction zone according to the location block information, calculates the union of each reception allowance zone and the union of the reception restriction zone, calculates the difference of the two unions, and finally receives the reception. A mobile communication terminal for determining a restricted area. The method of claim 16, When the union of the allowable blocks is A and the union of the reception restriction blocks is B, The smart card, In the union A of the reception blocks, the difference AB minus the union B of the reception restriction blocks is determined as the final reception area, and the difference BA minus the union A of the reception blocks in the reception B of the reception restriction blocks is the final reception restriction area. And a mobile communication terminal. The method of claim 11 or 15, The mobile communication terminal comprises a GPS receiver, The location information acquisition unit, by using the GPS receiver to obtain the latitude / longitude coordinates of the current location, and transmits it to the smart card. The method of claim 11 or 15, The location information acquisition unit, characterized in that for transmitting the latitude / longitude value of the adjacent base station to the smart card. A message transmitted together with a broadcast program encrypted with a control word (CW) transmitted to a mobile communication terminal through a broadcast network, and includes a control word (CW) used for encrypting broadcast program data and receiving qualification information for each channel / program. And a CAS server generating a control message (ECM) and an entitlement management message (EMM) including an encryption key of the entitlement control message and viewing entitlement information for each subscriber, and using the entitlement control message and the entitlement management message. Restriction of reception in a reception restriction system (CAS) for restricting a multimedia broadcasting reception qualification of a mobile communication terminal by causing a mobile communication terminal having a smart card to extract (CW) to perform broadcast program data decoding using the control word. As a method, PN identification information and reception allowance / restriction for the CAS server to distinguish a block type indicating a reception / restriction area representation type as a program / channel reception qualification information, a reception allowance and a reception restriction area (Negative) Generating one or more location block information including parameter values including latitude / longitude information required to determine an area; Generating a credential control message including the generated at least one location block information and a control word (CW); Reception restriction method using the location information of the mobile communication terminal, characterized in that comprises a. A message transmitted together with a broadcast program encrypted with a control word (CW) transmitted to a mobile communication terminal through a broadcast network, and includes a control word (CW) used for encrypting broadcast program data and receiving qualification information for each channel / program. And a CAS server generating a control message (ECM) and an entitlement management message (EMM) including an encryption key of the entitlement control message and viewing entitlement information for each subscriber, and using the entitlement control message and the entitlement management message. Restriction of reception in a reception restriction system (CAS) for restricting a multimedia broadcasting reception qualification of a mobile communication terminal by causing a mobile communication terminal having a smart card to extract (CW) to perform broadcast program data decoding using the control word. As a method, Latitude / necessary for the CAS server to determine a block type indicating a receiving / restricted region representation method, PN identification information for distinguishing a positive and a restricted reception region, and a receiving / restricting region Generating one or more position block information including parameter values including longitude information; Generating a credential management message including the generated at least one location block information and an encryption key of the credential control message; Reception restriction method using the location information of the mobile communication terminal, characterized in that comprises a. The method of claim 20 or 21, After the second step, Separately transmitting, by the CAS server, a subscriber's entitlement management message (EMM) to the subscriber via a mobile communication network; Reception restriction method using the location information of the mobile communication terminal further comprising. Encrypted control message (ECM) including broadcast program data encrypted with control word (CW), control word (CW) and channel / program reception entitlement information to mobile communication terminal, and encryption key of entitlement control message and subscriber's viewing entitlement A smart card for extracting a control word (CW) using the credential control message and the credential management message when an credential management message (EMM) including information is received; A descrambler for decoding the encrypted broadcast program data into a control word (CW) received from the smart card and transmitting the decrypted broadcast program data to a broadcast reproducing apparatus; And a location information acquisition unit for obtaining a latitude / longitude value indicating its location information. As a reception restriction method in a mobile communication terminal comprising a, PN identification information and reception permission / restriction for distinguishing a block type indicating a reception / restriction area representation type as a reception qualification information for each program / channel, positive and reception restriction areas by the smart card When a qualification control message having one or more location block information including parameter values including latitude / longitude information required to determine an area is received, latitude / longitude information indicating a current location of a mobile communication terminal is received by the location information acquisition unit. Requesting a first step; Set the range of the reception / restriction area according to the location block information, calculate the union of each reception-reception area and the union of the reception-restriction area, and calculate the difference of the two unions to determine the final reception / restriction area. A second step of doing; A third step of comparing the determined final reception allowance / restriction zone with current location information of the mobile communication terminal to determine whether the mobile communication terminal is within the reception allowance zone; And A fourth step of providing a control word in the entitlement control message to the descrambler so as to decode broadcast program data using the control word by the descrambler when the reception allowance area is within a reception allowable area; Reception restriction method using the location information of the mobile communication terminal, characterized in that comprises a. Encrypted control message (ECM) including broadcast program data encrypted with control word (CW), control word (CW) and channel / program reception entitlement information to mobile communication terminal, and encryption key of entitlement control message and subscriber's viewing entitlement A smart card for extracting a control word (CW) using the credential control message and the credential management message when an credential management message (EMM) including information is received; A descrambler for decoding the encrypted broadcast program data into a control word (CW) received from the smart card and transmitting the decrypted broadcast program data to a broadcast reproducing apparatus; And a location information acquisition unit for obtaining a latitude / longitude value indicating its location information. As a reception restriction method in a mobile communication terminal comprising a, When the smart card receives a credential management message including one or more location block information including latitude / longitude values for indicating the reception permission / restriction area as the reception credential information for each subscriber, the mobile terminal receives the location information acquisition unit of the mobile communication terminal. Requesting latitude / longitude information indicating a current location; Set the range of the reception / restriction area according to the location block information, calculate the union of each reception-reception area and the union of the reception-restriction area, and calculate the difference of the two unions to determine the final reception / restriction area. A second step of doing; A third step of comparing the determined final reception allowance / restriction zone with current location information of the mobile communication terminal to determine whether the mobile communication terminal is within the reception allowance zone; And A fourth step of providing a control word in the entitlement control message to the descrambler so as to decode broadcast program data using the control word by the descrambler when the reception allowance area is within a reception allowable area; Reception restriction method using the location information of the mobile communication terminal, characterized in that comprises a. The method of claim 23 or 24, The first step, A method of limiting reception using location information of a mobile communication terminal, characterized in that performed at the time of starting to watch a broadcast. The method of claim 23 or 24, The first step, A method of limiting reception using location information of a mobile communication terminal, characterized in that performed at a time point when a broadcast channel is changed. The method of claim 23 or 24, The first step, A method of limiting reception using location information of a mobile communication terminal, characterized in that it is repeatedly performed at a predetermined period. delete The method of claim 23 or 24, The second step, When the union of the reception blocks is called A and the union of the reception restriction blocks is called B, the difference AB obtained by subtracting the reception B of the reception restriction blocks from the union A of the reception blocks is determined as the final reception area, and reception restriction. And determining a difference BA obtained by subtracting the union A of the allowable blocks from the union B of the blocks, as a final reception restriction region. The method of claim 23 or 24, In the second step, When the block type of the location block information is a rectangle, and the location block information includes two latitude / longitude values, the smart card uses one latitude / longitude value as a point that points to the top of one side of the rectangle, and the other A method of limiting reception using location information of a mobile communication terminal, wherein the latitude / longitude value is set as a point indicating the lower end of the quadrangle. The method of claim 23 or 24, In the second step, The block type of the location block information is circular, the location block information includes one latitude / longitude value, one distance value, one latitude / longitude value and one latitude value, and In the case of any one case including one latitude / longitude value and one longitude value, the smart card uses the latitude / longitude value as a point indicating the center of the circle and uses the other value to determine the size of the circle. Receiving method using the location information of the mobile communication terminal, characterized in that for setting the circular reception allowance / restricted area range by determining a. The method of claim 23 or 24, In the second step, The block type is elliptical, and the location block information includes one latitude / longitude value and two distance values, and one latitude / longitude value and two other latitude / longitude values. In either case, the smart card uses one latitude / longitude value as a point indicating the center of the ellipse and sets the elliptical reception / restriction area range by determining the shape of the ellipse using two other values. A reception restriction method using location information of a mobile communication terminal. The method of claim 23 or 24, The mobile communication terminal comprises a GPS receiver, After the first step and before the second step, Obtaining, by the location information acquisition unit, the latitude / longitude coordinates of the current location by using the GPS receiver, and transmitting the same to the smart card; Reception restriction method using the location information of the mobile communication terminal further comprising. The method of claim 23 or 24, After the first step and before the second step, Transmitting, by the location information acquisition unit, latitude / longitude values of an adjacent base station to the smart card; Reception restriction method using the location information of the mobile communication terminal further comprising.

Images