JP2004173253A - Conditional reception system and receiver - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a conditional access system capable of preventing an unauthorized transfer of a receiver between CATV stations and promoting a subscriber to join a transfer destination CATV station.
SOLUTION: This conditional access system includes a HITS station 101 for transmitting contents, a plurality of CATV stations 106a and the like, and a receiver 112. The receiver 112 includes a CATV station 106a and the like as a partner of a viewing contract. The storage unit 116 storing the CATV station identifier to be identified, the CATV station identifier transmitted from the CATV station 106a and the like are received, and the received CATV station identifier and the CATV station identifier stored in the storage unit 116 are compared. It is determined whether or not they match, and when it is determined that they do not match, the cable modem unit 114 for transmitting inter-station relocation information including the receiver identifier of the receiver 112 and the received CATV station identifier to the HITS station 101; It includes a CPU 115 and the like.
[Selection diagram] Fig. 1

Description

  The present invention relates to a conditional access system for content distribution such as a cable television, and more particularly, to a technology for promoting a subscription contract to a viewer when a receiver is relocated between relay stations such as a CATV station.

  In a CATV system, a plurality of CATV stations receive content broadcast from the same content provider via a satellite, and each CATV station sends the content to a viewer who has a viewing contract (subscription contract) with the station. Has been delivered. For paid content, the content provider uses the conditional access function to convert the content into encrypted content that can be viewed only by the subscriber, and then broadcasts it via satellite. Has been re-sent to viewers. As a result, limited reception of paid content is operated under the management of the content provider.

  As described above, since conditional access is performed not by each CATV station but by the content provider, for example, the viewer moves from the operation area of the first CATV station to the operation area of the second CATV station. In such a case, in spite of having subscribed only to the first CATV station, in principle, it is possible to view pay contents with the same receiver in the operation area of the second CATV station. It will be possible. That is, it is possible to view the pay content distributed by the second CATV station, even though the user does not have a viewing contract with the second CATV station.

Conventionally, in order to prevent such unauthorized transfer of a receiver between CATV stations, a trans-modulation viewing control system is introduced for each CATV station, so that receivers transferred between CATV stations without permission can be viewed on all channels. It is not allowed (for example, see Non-Patent Document 1).
In this system, the receiver receives and stores the identifier of the CATV station transmitted from the CATV station subscribed to the viewing and listening, and when the identifier of the different CATV station is transmitted after the relocation, the receiver receives the identifier. The device detects the relocation by comparing the identifier with the already stored identifier, and does not receive the content distributed from the relocation-destination CATV station. This prevents unauthorized transfer.
"Japan Cable Laboratory Specification BS Digital Broadcasting Transmodulation Operation Specification JCL SPEC-001 Version 1.0", JCTA Japan Cable Laboratory, October 28, 2000, page 13, Chapter 4, "Viewing Control Function"

However, such a conventional technique provides a certain deterrent to prevent unauthorized relocation, but the CATV station can grasp that the relocation has been performed without permission, or can notify a new receiver to the relocated CATV station. Or subscription (viewing contract) cannot be promoted.
Therefore, the present invention solves such a problem, and when a conditional access system of a content provider is shared by a plurality of CATV stations, it is possible to prevent unauthorized transfer between receiver CATV stations and to transfer a receiver. It is an object of the present invention to provide a conditional access system capable of promoting the subscription to a destination CATV station.

  In order to achieve the above object, a conditional access system according to the present invention includes a content providing device that transmits content that can be received only by a receiver having a viewing contract, and a content transmitted from the content providing device. A conditional access system including a plurality of relay stations for receiving and retransmitting, and a receiver for receiving content retransmitted from the relay station, wherein the receiver includes a relay station that is a partner of the viewing contract. A station identifier storing means for storing a station identifier to be identified, a station identifier receiving means for receiving a station identifier transmitted from a relay station, a station stored in the received station identifier and the station identifier storing means Determining means for determining whether the identifiers match, and determining that the received station identifier does not match the station identifier stored in the station identifier storage means. The case, characterized in that it comprises a inter-station relocation information transmitting means for transmitting the inter-station relocation information information including receiver identifier that identifies the receiver to the content providing device addressed.

  At this time, for example, in addition to the receiver identifier, the inter-office relocation information transmitting means transmits, to the content providing apparatus, information including the station identifier received by the station identifier receiving means as the inter-office relocation information. The relay station receives the inter-station transfer information addressed to the content providing apparatus transmitted from the receiver and transfers the information to the content providing apparatus.

  As a result, the content providing apparatus can recognize the relocated receiver and the relocation destination relay station. Therefore, the content providing apparatus may include a receiving unit that receives the inter-station relocation information transmitted from the relay station, and a receiver indicated by the receiver identifier included in the received inter-station relocation information. And a message transmitting means for transmitting an EMM (Entitlement Management Message) of a content urging a subscription contract to the relay station indicated by the station identifier included in the inter-station relocation information. Further, the content providing device may include a receiving unit that receives the inter-station relocation information transmitted from the relay station, and a receiver indicated by the receiver identifier included in the received inter-station relocation information. It is also possible to provide viewing restriction means for transmitting viewing-restricted content.

  Here, the relay station includes station identifier transmitting means for transmitting a station identifier for identifying the own station to a receiver, and the receiver is further transmitted from the relay station when the power of the receiver is off. Station identifier storing means may be provided for receiving the incoming station identifier and storing it in the station identifier storing means. This makes it possible to reliably receive and hold the CATV station identifier of the CATV station of the other party to which the receiver subscribes for viewing.

Further, the station identifier transmitting means may transmit the station identifier using an engineering TS. As a result, the data download device using the engineering TS can be handled in the same manner as the receiver.
The receiver further includes IC card reading means for reading an IC card identifier from a removable IC card, and the inter-office relocation information transmitting means reads the IC card identifier read by the IC card reading means. The inter-station relocation information may be transmitted as a receiver identifier. This makes it possible to adapt the conditional access system according to the present invention to a conditional access system using an IC card that is common in digital broadcasting.

  In addition, the receiver further stores viewing result information indicating a result of viewing by the receiver in a removable IC card, and reads the viewing result information from the IC card and transmits the reading result information to the content providing device. An inter-office transfer information transmitting means may be provided, the inter-station transfer information transmitting means transmitting the inter-station transfer information at the same time as the viewing result information is transmitted to the content providing apparatus. As a result, with respect to the interface between the IC card and the receiver, a change from the conventional conditional access system for realizing the conditional access system according to the present invention can be minimized.

  The present invention can be implemented not only as a conditional access system, but also as a content providing device, a relay station, and a receiver that constitute the conditional access system, or as a characteristic component in the conditional access system. The invention may be realized as an invention of the method described above, or as a program for causing a computer to execute those steps. It goes without saying that the program can be distributed via a recording medium such as a CD-ROM or a transmission medium such as the Internet.

  By using the conditional access system of the present invention, a content provider can grasp a receiver relocated without permission between CATV stations and a relocated CATV station. Further, a message prompting to join is displayed on the corresponding receiver, so that promotion of joining at the relocation destination can be expected, and the receiver can know the contact address of the corresponding CATV station.

Hereinafter, embodiments of a conditional access system according to the present invention will be described in detail with reference to the drawings.
FIG. 1 is a block diagram showing a configuration of the conditional access system according to the embodiment of the present invention. This conditional access system is a conditional access system for CATV, and when a receiver is relocated between CATV stations, a content provider or a CATV station can detect the relocation and urge viewers of the receiver to join. This is a possible system, and comprises a HITS (Headend In The Sky) station 101, a satellite 105, CATV stations 106a and 106b, a receiver 112, a communication network 111, cable networks 117a and 117b, and the like. Although FIG. 1 shows only one HITS station 101, two CATV stations 106a and 106b, and one receiver 112 for the sake of explanation, the present invention relates to the number of these devices. It is not limited.

  The communication network 111 is a bidirectional communication network such as a dedicated line connecting the HITS station 101 and the CATV stations 106a and 106b, or the Internet. The cable networks 117a and 117b are optical fiber cables for distributing CATV content from the CATV stations 106a and 106b to the receiver 112 and transferring information from the receiver 112 to the CATV stations 106a and 106b.

  The HITS station 101 is a transmitting station of a content provider, that is, a broadcasting station that scrambles content and distributes the scrambled content to the CATV stations 106a and 106b via the satellite 105. A facility 104 is provided. The conditional access station equipment 102 is an encryption device that scrambles content so that only a receiver with a viewing contract can receive the content, and transmits an EMM (Entitlement Management Message, individual information) and the like that enable conditional access. Send. The transmission equipment 103 is a transmission device that uploads the content scrambled by the conditional access station equipment 102 to the satellite 105. The data collection equipment 104 receives and accumulates information transmitted from the CATV stations 106a and 106b via the communication network 111 (inter-office relocation information including an identifier of a relocated CATV station and an identifier of a receiver). It is a receiving device. The inter-station relocation information is information indicating that the receiver has moved between CATV stations, and includes at least the identifier of the receiver and the identifier of the relocation-destination CATV station.

The satellite 105 is a communication satellite that receives the content transmitted from the HITS station 101 and broadcasts the content to the CATV stations 106a and 106b.
The CATV station 106a is a relay device that receives the content transmitted from the HITS station 101 via the satellite 105 and retransmits the content to the receiver 112 via the cable network 117a, and includes a retransmission facility 107a and an engineering TS (Engineering TS). A transport stream (TS) 108a, a cable modem terminal system (CMTS) 109a, and a multiplexer 110a are provided. The retransmission equipment 107a is a transceiver that receives the content sent from the HITS station and retransmits it to the multiplexer 110a. The engineering TS transmission equipment 108a internally stores an identifier (CATV station identifier) for uniquely identifying the own station (CATV station 106a), and repeatedly transmits the CATV station identifier to the multiplexer 110a as an engineering TS. The engineering TS is an independent data stream different from a general broadcast stream including a video stream and an audio stream, and is a stream for a receiver to download data such as software. The multiplexer 110a multiplexes the content sent from the retransmission equipment 107a and the CATV station identifier sent from the engineering TS transmission equipment 108a, and distributes the transport stream to the receiver 112 via the cable network 117a. , A multiplexing and receiving apparatus that receives information (such as inter-station relocation information) transmitted from the receiver 112 via the cable network 117a and passes it to the CMTS 109a. The CMTS 109a is a communication interface for transmitting inter-station transfer information passed from the multiplexer 110a to the HITS station 101 via the communication network 111.

  The CATV station 106b is a relay device that receives the content transmitted from the HITS station 101 via the satellite 105 and retransmits it to the receiver 112 via the cable network 117a, and has the same configuration as the CATV station 106a. . That is, the CATV station 106b multiplexes the content broadcast from the HITS station 101 with the CATV station identifier of the own station (the CATV station 106b), and retransmits it to the receiver 112 via the cable network 117b. The constituent elements 107b to 110b of the CATV station 106b have the same functions as the constituent elements of the CATV station 106a, and thus a detailed description thereof will be omitted.

  The receiver 112 is a device that receives the content broadcasted from the HITS station 101 via the CATV stations 106a and 106b and outputs it as a video and audio signal, and includes a tuner unit 113, a cable modem unit 114, a CPU 115, and a storage unit. 116 is provided. The tuner unit 113 selects and receives a content (or a program) desired by the user from a plurality of contents (or a plurality of programs) transmitted from the CATV station 106a (or the CATV station 106b), A tuner and a decoder for decoding into signals. The storage unit 116 is a non-volatile memory or the like for storing the identifier of the CATV station that is the partner of the viewing contract (in this figure, the CATV station identifier of the CATV station 106a transmitted from the CATV station 106a). The cable modem unit 114 is a communication interface that enables bidirectional communication between the CATV station and the receiver 112, that is, a transmission device for transmitting information from the receiver 112 to the CATV station 106a via the cable network 117a. For example, after the transfer, after transferring the inter-station transfer information including an identifier (receiver identifier) for uniquely identifying the receiver 112 under the control of the CPU 115 and a transfer destination (for example, the CATV station identifier of the CATV station 106b). It transmits to the connected new CATV station (for example, CATV station 106b). The CPU 115 is a controller having a program for controlling the tuner unit 113, the cable modem unit 114, and the storage unit 116 built therein.

Note that the receiver 112 includes a conditional access processing unit (not shown), and receives only paid contents for which the viewer has a viewing contract. When an IC card is employed as the conditional access processing means, the above-mentioned receiver identifier is a card ID assigned to the IC card.
The operation of the conditional access system configured as described above will be described.

  FIG. 2 is a flowchart showing an operation procedure of the receiver 112 when a CATV station identifier transmitted from the CATV station is received, that is, an operation procedure of the receiver 112 under the control of the CPU 115. Here, it is assumed that the storage unit 116 of the receiver 112 stores the CATV station identifier of the CATV station that has already received a viewing contract (that is, the CATV station before relocation). For example, the receiver 112 obtains the CATV station identifier of the CATV station 106a by receiving the engineering TS when the power is turned off when the viewing contract has been made with the CATV station 106a and the receiver 112 is already used. It is stored.

  First, when the tuner unit 113 receives the CATV station identifier transmitted from the CATV station 106a or 106b (S10), the receiver 112 reads the CATV station identifier stored in the storage unit 116, and reads the two CATV station identifiers. The identifiers are compared (S11). As a result, when the received CATV station identifier matches the CATV station identifier stored in the storage unit 116 (Yes in S12), the receiver 112 determines that no relocation has occurred between the CATV stations. It is determined and the same processing is repeated without performing any special processing (S10 to S12). However, if the received CATV station identifier does not match the CATV station identifier stored in the storage unit 116 (S12: NO). No), the receiver 112 determines that relocation between CATV stations has occurred, and transmits inter-station relocation information including the received CATV station identifier and its own receiver identifier to the CATV station 106a or 106b (S13). ). At this time, the receiver 112 transmits the inter-station relocation information to the CATV station 106a or 106b, with the identifier specifying the HITS station 101 received by the EMM transmitted from the limited receiving station equipment 102 of the HITS station 101 as a destination. .

  Thereafter, the inter-station relocation information transmitted from the receiver 112 is transmitted from the CATV station 106a or 106b to the HITS station 101 (the data collection equipment 104 of the HITS station 101) via the communication network 111. Therefore, the data collection equipment 104 of the HITS station 101 that has received the inter-station relocation information, the receiver 112 determines the inter-station relocation information from the two identifiers (CATV station identifier and receiver identifier) included in the inter-station relocation information. It is possible to know that it has been relocated, that is, which receiver 112 has relocated to which CATV station. Therefore, for example, the HITS station 101 transmits a message prepared in advance for each CATV station identifier collected by the data collection facility 104 as an EMM to the corresponding receiver 112 using the conditional access station facility 102, and the receiver 112 The received message, for example, "Please call the CATV station (XXX-XXXX) in order to make a viewing contract" is displayed on the television receiver, and the receiver views the message to join the relocated receiver. Promotion becomes possible. Also, the CATS station of the relocation destination does not completely disable viewing of the corresponding receiver 112, but the HITS station 101 uses the limited reception station equipment 102 to restrict viewing of the corresponding receiver 112. By subscribing to the broadcast, that is, permitting viewing of the content with restrictions, the subscription is further promoted.

  Note that the timing at which the receiver 112 transmits the inter-office transfer information addressed to the HITS station 101 to the CATV station may be simultaneously performed when the PPV (Pay Per View) history is uploaded to the HITS station 101. For example, when the receiver has a function of storing viewing result information indicating the result of viewing by the receiver in a removable IC card, and having a function of reading the viewing result information from the IC card and transmitting it to the HITS station 101, The device may transmit inter-station relocation information in addition to transmitting the viewing result information to the HITS station 101. In this case, the data collection facility 104 of the HITS station 101 also functions as a PPV history collection device.

  FIG. 3 is a communication sequence diagram showing an operation of the conditional access system (operation centering on transmission and reception of various identifiers) when the receiver 112 is moved from the CATV station 106a to the CATV station 106b. Here, the CATV station identifier of the CATV station 106a is "A", the CATV station identifier of the CATV station 106b is "B", and the receiver identifier of the receiver 112 is "C".

Now, as shown in the upper diagram of FIG. 3, when the receiver 112 is connected to the CATV station 106a subscribed to viewing, the receiver 112 transmits the CATV transmitted from the CATV station 106a by the engineering TS. The station identifier "A" is received (S20) and stored in the storage unit 116 (S21).
Thereafter, it is assumed that the receiver 112 has been moved from the operation area of the CATV station 106a to the operation area of the CATV station 106b as shown in the lower diagram of FIG. Then, the receiver 112 receives the CATV station identifier “B” sent from the CATV station 106b by the engineering TS (S30), and thus receives the received CATV station identifier “B” and the CATV stored in the storage unit 116. By comparing with the station identifier "A", it is detected that they do not match (S31). Then, the receiver 112 transmits the inter-station transfer information including the currently received CATV station identifier “B” and its own identifier (receiver identifier “C”) to the CATV station 106b as data addressed to the HITS station 101 ( S32).

  The inter-station transfer information transmitted from the receiver 112 is transferred to the HITS station 101 via the CATV station 106b (S33), and the HITS station 101 transfers the receiver 112 with the receiver identifier "C" to the CATV station 106b. The EMM sends a message to the receiver 112 of the receiver identifier "C" to the effect that the user has subscribed to the CATV station 106b (S35), or uses the conditional access function. By broadcasting the content restricted for viewing to the receiver 112 with the receiver identifier “C”, the subscriber 112 is prompted to subscribe to the CATV station 106b, or the communication network 111 is notified that the receiver 112 has been relocated. The notification is sent to the CATV station 106b via the network.

  Thus, unlike a conventional measure for preventing unauthorized relocation using the transmodulation viewing control system, the relocated receiver 112 is encouraged to join (contract) with the relocated CATV station 106b.

As described above, the conditional access system according to the present invention has been described based on the embodiment, but the present invention is not limited to this embodiment.
For example, in the present embodiment, the receiver 112 after the relocation transmits the CATV station identifier and the receiver identifier to the CATV station when the received CATV station identifier does not match the held CATV station identifier. However, as in the communication sequence example shown in FIG. 4, in that case, only the receiver identifier may be transmitted to the CATV station (S32a). The CATV station that has received the receiver identifier transfers the receiver identifier added with its own CATV station identifier to the HITS station 101 as inter-station relocation information (S33), and the station that reaches the HITS station 101. The contents of the transfer information are the same.

  Further, in the present embodiment, the inter-station relocation information includes the receiver identifier and the CATV station identifier. However, the inter-station relocation information is not limited to such information. For example, in addition to these identifiers, In addition, information such as the CATV station identifier stored in the storage unit 116 of the receiver (that is, the CATV station identifier of the CATV station subscribed to before the transfer) and the transfer date and time may be included. As a result, various services and communications can be made to the receiver, the CATV station, and the like by the HITS station 101 that has acquired such inter-station relocation information.

  In the present embodiment, the inter-station relocation information transmitted by the receiver 112 is transferred to the HITS station 101 via the CATV station. However, as in the system configuration example shown in FIG. 112 may be transferred to the HITS station 101. This is possible, for example, when the receiver 112 and the HITS station 101 are connected by a communication network such as the Internet, or are connected via the cable networks 117a and 117b. As a result, relocation information unknown to the CATV station can be provided from the HITS station to the CATV station.

  Further, in the present embodiment, the HITS station 101 and the CATV stations 106a and 106b are connected by one-way satellite communication via the satellite 105, but may be connected by two-way communication such as a terrestrial line. Good. For example, as in the system configuration example shown in FIG. 6, the HITS station 101, the CATV stations 106a to 106b, and the receivers 112a to 112b may be connected via the Internet 120. In this case, the content distribution from the HITS station 101 to the receivers 112a to 112b and the data transmission of the inter-office transfer information from the receivers 112a to 112b to the CATV stations 106a to 106b and the HITS station 101 are performed over the Internet. Will be done through.

Further, in the present embodiment, receiver 112 is a TV tuner that receives a broadcast and outputs a video signal to a television receiver. However, the present invention is not limited to such a receiver. A portable information terminal such as a mobile phone that receives and reproduces music content or video content may be used.
Also, in the present embodiment, CATV stations 106a and 106b transmitted the CATV station identifier in the engineering TS. However, as a means for transmitting the CATV station identifier, a frequency band different from the frequency band of general broadcasting may be used. For example, the transmission may be performed using a transmission method different from the engineering TS, such as transmission using the modulation method described above.

  The present invention relates to a conditional access system for distributing content via a transmission medium such as a cable television or the Internet and a receiver thereof, particularly when a receiver is relocated between relay stations such as CATV stations. It can be used as a conditional access system or the like that can promote a contract.

FIG. 1 is a block diagram illustrating a configuration of a conditional access system according to an embodiment of the present invention. It is a flowchart which shows the operation | movement procedure of the receiver at the time of receiving the CATV station identifier transmitted from the CATV station. FIG. 7 is a communication sequence diagram showing an operation of the conditional access system when a receiver is moved between CATV stations. It is a communication sequence diagram which shows another operation | movement of the conditional access system when a receiver is moved between CATV stations. It is a block diagram showing another example of composition of the conditional access system concerning the present invention. FIG. 10 is a block diagram showing still another configuration example of the conditional access system according to the present invention.

Explanation of reference numerals

101 HITS station 102 Limited reception station equipment 103 Transmission equipment 104 Data collection equipment 105 Satellites 106a to 106b CATV stations 107a, 107b Retransmission equipment 108a, 108b Engineering TS transmission equipment 109a, 109b CMTS (Cable Modem Terminal System)
110a, 110b Multiplexer 111 Communication Network 112 Receiver 113 Tuner Unit 114 Cable Modem Unit 115 CPU
116 Storage Unit 117a, 117b Cable Network 120 Internet

Claims (22)

A content providing apparatus for transmitting content that can be received only by a receiver having a viewing contract, a plurality of relay stations for receiving and retransmitting the content transmitted from the content providing apparatus; A conditional access system including a receiver for receiving the transmitted content,
The receiver,
Station identifier storage means for storing a station identifier for identifying a relay station which is a counterpart of the viewing contract;
Station identifier receiving means for receiving a station identifier transmitted from the relay station;
Determining means for determining whether the received station identifier matches the station identifier stored in the station identifier storage means,
When it is determined that the received station identifier does not match the station identifier stored in the station identifier storage means, the content provision is performed by using information including the receiver identifier for identifying the receiver as inter-station transfer information. A conditional access system comprising: an inter-office relocation information transmitting means for transmitting to a device. The inter-station relocation information transmitting means transmits information including the station identifier received by the station identifier receiving means in addition to the receiver identifier to the content providing device as the inter-station relocation information. The conditional access system according to claim 1, wherein: The inter-station relocation information transmitting means transmits inter-station relocation information addressed to the content providing device to a relay station that has transmitted the station identifier,
The conditional access system according to claim 2, wherein the relay station receives inter-station transfer information addressed to the content providing device transmitted from the receiver and transfers the information to the content providing device. The content providing device includes:
Receiving means for receiving inter-station relocation information transmitted from the relay station,
An EMM that prompts the receiver identified by the receiver identifier included in the received inter-station relocation information to join a relay station indicated by the station identifier included in the inter-station relocation information. The conditional access system according to claim 3, further comprising: a message transmitting unit that transmits (Entitlement Management Message). The content providing device includes:
Receiving means for receiving inter-station relocation information transmitted from the relay station,
The conditional access according to claim 3, further comprising: viewing restriction means for transmitting viewing-restricted content to a receiver indicated by the receiver identifier included in the received inter-station relocation information. system. The relay station includes a station identifier transmitting unit that transmits a station identifier identifying the own station to the receiver,
The receiver further includes a station identifier storage unit that receives a station identifier transmitted from the relay station when the power of the receiver is off and stores the station identifier in the station identifier storage unit. Item 3. The conditional access system according to Item 1. The conditional access system according to claim 6, wherein the station identifier transmitting means transmits the station identifier using an engineering TS. The receiver further includes an IC card reading unit that reads an IC card identifier from a removable IC card,
2. The conditional access system according to claim 1, wherein the inter-office relocation information transmitting unit transmits the inter-office relocation information using the IC card identifier read by the IC card reading unit as the receiver identifier. 3. The receiver further stores viewing result information indicating a result of viewing by the receiver in a removable IC card, and reads the viewing result information from the IC card and transmits the viewing result information to the content providing device. With means,
2. The conditional access system according to claim 1, wherein the inter-station relocation information transmitting unit transmits the inter-station relocation information at the same time that the viewing result information is transmitted to the content providing device. 3. 2. The inter-office relocation information transmitting means transmits the inter-office relocation information to a destination of an identifier of the content providing device notified in advance by using an EMM from the content providing device. Receiving system. The inter-station relocation information transmitting means transmits inter-station relocation information addressed to the content providing device to a relay station that has transmitted the station identifier,
The relay station transmits, as new inter-station relocation information, information in which the inter-station relocation information transmitted from the receiver includes the station identifier of the own station to the content providing apparatus. Item 3. The conditional access system according to Item 1. The content providing device is a HITS (Headend In The Sky) station that distributes content to the plurality of relay stations using satellite communication,
The conditional access system according to claim 1, wherein the relay station is a CATV station that retransmits the content distributed from the content providing device to the receiver via a cable. The inter-station relocation information transmitting means transmits inter-station relocation information addressed to the content providing device to the relay station via the cable,
The conditional access according to claim 12, wherein the relay station transmits inter-station relocation information addressed to the content providing device transmitted from the receiver to the content providing device via a two-way communication network. system. A content providing apparatus for transmitting content that can be received only by a receiver having a viewing contract, a plurality of relay stations for receiving and retransmitting the content transmitted from the content providing apparatus; And a receiver for receiving the transmitted content, a receiver in a conditional access system including:
Station identifier storage means for storing a station identifier for identifying a relay station which is a counterpart of the viewing contract;
Station identifier receiving means for receiving a station identifier transmitted from the relay station;
Determining means for determining whether the received station identifier matches the station identifier stored in the station identifier storage means,
When it is determined that the received station identifier does not match the station identifier stored in the station identifier storage means, the content provision is performed by using information including the receiver identifier for identifying the receiver as inter-station transfer information. And an inter-station relocation information transmitting means for transmitting the information to a device. The inter-station relocation information transmitting means transmits information including the station identifier received by the station identifier receiving means in addition to the receiver identifier to the content providing device as the inter-station relocation information. The receiver according to claim 14, characterized in that: The inter-station relocation information transmitting means transmits inter-station relocation information addressed to the content providing device to a relay station that has transmitted the station identifier,
16. The receiver according to claim 15, wherein the relay station receives the inter-station relocation information transmitted from the receiver and addressed to the content providing device, and transfers the information to the content providing device. The relay station includes a station identifier transmitting unit that transmits a station identifier identifying the own station to the receiver,
The receiver further includes a station identifier storage unit that receives a station identifier transmitted from the relay station when the power of the receiver is off, and stores the received station identifier in the station identifier storage unit. Item 15. The receiver according to Item 14. The receiver further includes an IC card reading unit that reads an IC card identifier from a removable IC card,
The receiver according to claim 14, wherein the inter-office relocation information transmitting means transmits the inter-office relocation information using the IC card identifier read by the IC card reading means as the receiver identifier. The receiver further stores viewing result information indicating a result of viewing by the receiver in a removable IC card, and reads the viewing result information from the IC card and transmits the viewing result information to the content providing device. With means,
The receiver according to claim 14, wherein the inter-station relocation information transmitting unit transmits the inter-station relocation information at the same time as the viewing result information is transmitted to the content providing device. 15. The inter-office relocation information transmitting means transmits the inter-office relocation information to a destination of an identifier of the content providing device notified in advance by using an EMM from the content providing device. Machine. A content providing apparatus for transmitting content that can be received only by a receiver having a viewing contract, a plurality of relay stations for receiving and retransmitting the content transmitted from the content providing apparatus; An inter-station relocation management method for managing inter-station relocation by a receiver in a conditional access system including a receiver that receives transmitted content,
The receiver includes a station identifier storage unit that stores a station identifier that identifies a relay station that is a partner of the viewing contract,
The inter-office relocation management method comprises:
A station identifier receiving step of receiving a station identifier transmitted from the relay station;
A determining step of determining whether or not the received station identifier matches the station identifier stored in the station identifier storage means;
When it is determined that the received station identifier does not match the station identifier stored in the station identifier storage means, the content providing apparatus uses information including the receiver identifier for identifying the receiver as inter-office transfer information. And a step of transmitting inter-station relocation information to be transmitted to the address. A content providing apparatus for transmitting content that can be received only by a receiver having a viewing contract, a plurality of relay stations for receiving and retransmitting the content transmitted from the content providing apparatus; A program for managing inter-station relocation by a receiver in a conditional access system including a receiver for receiving transmitted content,
The receiver includes a station identifier storage unit that stores a station identifier that identifies a relay station that is a partner of the viewing contract,
The program is
A station identifier receiving step of receiving a station identifier transmitted from the relay station;
A determining step of determining whether or not the received station identifier matches the station identifier stored in the station identifier storage means;
When it is determined that the received station identifier does not match the station identifier stored in the station identifier storage means, the content providing apparatus uses information including the receiver identifier for identifying the receiver as inter-office transfer information. And a step of transmitting inter-station relocation information to be transmitted to the program.

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