JP2000252901A - Data distribution service system and data distribution control managing method utilizing satellite channel - Google Patents

Abstract

PROBLEM TO BE SOLVED: To facilitate to confirm the distribution situation of contents and to improve operability by allowing a base station to transmit a connection file prepared by a connection file preparing means to a 2nd terminal device through a satellite channel. SOLUTION: When a customer request source terminal device 10 side decides contents desired to be distributed and the distribution destination of the contents, it transmits the contents together with branch office number list information being the distribution destination to a repeater 50. The repeater 50 generates a distribution group header showing distribution destination group information. It simultaneously refers to a collation table, converts branch office number information in the branch office number list information into a terminal ID to make it a distribution destination header and prepares contents for distribution by connecting it with the contents. The repeater 50 transmits the contents for distribution together with the distribution group header to an uplink station 30. The station 30 simultaneously transmits the contents for distribution including the distribution destination header to a receiving terminal device 40 group belonging to a designated group through a satellite channel.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a data distribution system for a wide area or a large number of places, and more particularly to a data distribution service system using a satellite line and a data distribution control management method using a satellite line.

[0002]

2. Description of the Related Art As one form of a data distribution service using a satellite line, as shown in FIG.
PLINK station) 82 and an artificial satellite 8 in outer space
4. Customer request source terminal device 86, receiving terminal device 88, IS
There is a system for simultaneously transmitting data to a wide area / many places using a DN line. In this system, the customer request source terminal device 86 sends a file called a destination information header containing the content to be distributed via the artificial satellite 84 and the distribution destination group information to the UPLINK station 82 by FTP.
(File Transfer Protocol). U that received content and destination information header
The PLINK station 82 transmits the content data to the artificial satellite 8.
4 to the receiving terminal device 88. At this time, the receiving terminal devices 88 that receive data are grouped together (for example, receiving terminal groups 880), and perform simultaneous distribution to all the receiving terminal devices 88 belonging to this group. It is a major premise that the terminal configuration information of the group 880 is registered in the UPLINK station 82 in advance. This is because, in the conventional group distribution of the data distribution service using the satellite line, the distribution destination is limited by the encryption of the content and the encryption key recorded on the IC card or the like.

[0003] Receiving terminal device 8 that has received even part of the data
8 indicates, after completion of reception, UP using, for example, an ISDN line.
The reception status is returned to the LINK station 82. The UPLINK station 82 compiles the responses from the receiving terminal devices 88, and divides the result file into the receiving terminal devices 88 that can receive all data normally and the receiving terminal devices 88 that can receive only part of the data. It is configured to create. That is, the receiving terminal device 88 in the conventional system
Status responses are usually categorized into the following three:

(1) Successful reception response: Data was completely received.

(2) Partial reception failure response: Data is partially lost.

(3) No response: It was not possible to recognize that data is being distributed due to a defect in an antenna or the like.

[0007] Of these, a response is returned to the UPLINK station 82 only in cases (1) and (2), and the ID list of the terminal device 88 having the statuses (2) and (3) is described in the distribution result. Was to be done.

In the above system, the following procedure must be executed each time a distribution request is sent from the customer request source terminal device 86.

(1) A file describing the contents of a distribution request
(Header file) to the UPLINK station 82.

(2) UPLINK the content to be distributed
It is sent to the station 82.

(3) From the customer request terminal device 86 side, the UP
Input a command to notify the LINK station 82 of a distribution start request.

Therefore, a plurality of distribution requests can be simultaneously sent to the UPLI.
When transmitting to the NK station 82, the processes (1) to (3) need to be repeated the number of times of the distribution request.

[0013]

As described above, in a conventional data distribution service using a satellite line, a group 880, which is an aggregate of receiving terminal devices 88, is prepared when distributing contents. , A destination group is selected for each distribution. Moreover, it is a major premise that members belonging to this group are registered in advance.

That is, in the conventional group distribution of the data distribution service using the satellite line, the distribution destination is limited by the encryption of the content and the encryption key recorded on the IC card or the like. In order to change or add a group, it is necessary to notify the UPLINK station 82.
In addition, this change operation requires a considerable amount of time because it is performed manually. Therefore, it has been extremely difficult to dynamically change the destination according to the daily situation and the content of the content to be sent. Furthermore, in the conventional data distribution service using a satellite line, all the group attribute information is performed by the identification number (terminal ID) of the IC card or the like provided in the receiving terminal device 88. On the former terminal device side, for example, the troublesome management of associating the branch number with the ID of each receiving terminal device 88 is forced.

The confirmation of the content distribution status in the receiving terminal device 88 is performed by individually creating files based on replies according to the individual receiving states, as in the status processing of the receiving terminal device 88 described above. It was troublesome.

Further, in the above-mentioned conventional system, after transmitting two files (header file and content file) per one distribution request from the customer request source terminal device 82, the command is executed to the UPLINK station 82. Therefore, it is necessary to notify the start of distribution, and only one distribution request can be notified by one command input. For this reason, when transmitting a plurality of distribution requests at the same time, it is necessary to repeat file transmission and command input for the number of distribution requests, which is inefficient.

Therefore, the present invention has been made in consideration of the above circumstances, and solves the above-mentioned disadvantages by setting the distribution destination /
A data distribution service system with excellent operability that enables easy change and confirmation of content distribution status, and enables transmission and execution processing of multiple distribution requests in one operation, and data using a satellite line An object is to provide a distribution control management method.

[0018]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention provides a customer request source terminal (first terminal) and an UP.
By providing a relay device between the LINK station (base station) and the LINK station (base station), the content received from the customer request source terminal device and the distribution destination information header including unique destination information are combined to create distribution content, The content for distribution is configured to be distributed to the receiving terminal device (second terminal device) by the UPLINK station. As a result, it is possible to select the content on the receiving terminal device side, and it is possible to dynamically change the distribution destination even for distribution to the same group. When specifying distribution destination information, UPLINK
By using a customer-specific management system, for example, a branch number, without using the station group configuration information (receiving terminal device ID), it is possible to improve the customer interface function.

In addition, in the present invention, in addition to the above-described structure, when a plurality of content files for distribution exist, they are linked to each other, added with link information and created into one combined file, and
In addition to transmitting the connection file to the INK station, the transmission information of the connection file is monitored by monitoring the connection information of the transmission line with reference to the connection information of the connection file transmitted. As a result, the transmission request sequence is simplified, and the distribution request can be easily transmitted in one operation.

That is, in order to achieve the above object, the present invention relates to a first terminal device having various contents and distribution destination information of the contents, and the contents and distribution destination information transmitted from the first terminal device. A base station that receives the information via a terrestrial line and transmits the received information to a satellite line based on the distribution destination information; and a plurality of second stations that receive the content information transmitted from the base station via the satellite line. In the data distribution service system including the terminal device, when a plurality of the content and distribution destination information for distributing the content to the second terminal device are designated, the content and the corresponding distribution destination information are designated. A connection file creating means for connecting the files together to form a connection file, creating connection information relating to the connection, and adding the connection information to the connection file. Serial provided to a first terminal device, the base station has a configuration in which the binding file created by the combined file creating means so as to transmit to the second terminal device via the satellite line. And, in addition to this configuration,
Means for determining the transmission state by referring to the connection information of the combined file created and transmitted by the combined file creating means, and means for determining processing relating to the combined file based on the determination by the means. Provided.

Further, in addition to the above configuration, setting means for arbitrarily setting and changing distribution destination information for distributing the content of the first terminal device to the second terminal device, There is provided a creating means for creating a delivery content by combining the set delivery destination information and the content. Further, the second terminal device is provided with a judging means for judging whether the received content for distribution is information relating to the second terminal device. Furthermore,
When the determination means of the second terminal device determines that the content for distribution is related to the terminal device, a decryption means for decrypting the content for distribution is provided. Further, the second terminal device includes means for returning a response signal indicating that the distribution content has been received, when the distribution content has been completely decrypted by the decryption means. Further, the second terminal device is provided with a unit for invalidating or discarding the distribution content when the determination unit determines that the distribution content is unrelated to the terminal device. Further, the second terminal device is provided with means for controlling so as not to execute a reply process to the effect that the content has been received, when the second terminal device determines that the content for distribution is unrelated to the terminal device. Further, the creation means for creating the content for distribution is provided with means for comparing / converting the distribution destination information with the corresponding authentication information specific to the second terminal device.

[0022]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 shows a schematic configuration of an entire system according to the present embodiment. This system can transmit information to a wide area / many places at a time via a customer request source terminal device 10 and an artificial satellite 20. UPLINK station 30, this UPL
Receiving terminal device 4 for receiving transmission information from INK station 30
0, a relay device 50 interposed between the customer request source terminal device 10 and the UPLINK station 30. Here, there are a plurality of receiving terminal devices 40, each of which has the same attribute (eg, region unit).
Form a group 400.

The customer request terminal device 10 is composed of, for example, a personal computer (PC), and a content file 12 in which various contents are stored in a readable / writable manner, and a receiving terminal device 40 for designating the stored contents.
Has a distribution destination list file 14 for storing distribution destination list information (here, a branch number list) for distribution to the user in a readable / writable manner. Here, the contents and the contents of the distribution destination list can be rewritten by an input device such as a keyboard provided in the customer request terminal device 10.
In addition, the customer request source terminal device 10 has a function of connecting to the relay device 50 via a network, transmitting the content and the distribution destination list information, and receiving information from the relay device 50.

Further, when a plurality of contents are transmitted to the receiving terminal group 400, the customer request source terminal device 10 has a connection file function of automatically connecting the contents and creating a single connection file. Have. This coupling function will be described in detail with reference to FIG.
That is, in order to transmit a plurality of distribution requests (distribution destination list information and distribution content) to a distribution source in one file, a combined file is created in the following procedure.

(1) A combined file is created by linking a plurality of contents and distribution destination information corresponding to the contents.

(2) In order to identify a plurality of contents, a header (connection header) in which connection connection information of the distribution request is described is added to the head of the connection file. The combined header also describes the file size.

As a result, a plurality of contents for distribution and a distribution destination information file can be transmitted as one file.

The UPLINK station 30 is a broadcasting station (base station) provided on the ground, and transmits information transmitted from the relay device 50 to the satellite 20 existing in the outer space based on the instruction information of the relay device 50. It has a function of transmitting / distributing to a large number of receiving terminal devices 40 all at once through a wide area. Also, U
The PLINK station 30 has a distribution result storage file 32 for storing information on the distribution result.

The receiving terminal device 40 is composed of, for example, a PC capable of continuous operation without stop. The receiving terminal device 40 has a function of determining whether the received distribution information is information relating to the device itself, and It has a decryption function for decryption (including a decryption function and a compressed data decompression function). In addition, when the receiving terminal device 40 determines that the received distribution information does not relate to itself or determines that all the received information does not relate to the received distribution information,
It also has a function of discarding and invalidating the distribution information.

Further, the receiving terminal device 40 controls the contents of the receiving status related to the distribution information,
Has a reception status response function of transmitting the information to the UPLINK station 30 via the. That is, the status response function of the receiving terminal device 40 of the embodiment of the present invention is the following two types.

(1) Receiving success response processing The distribution data can be completely received, and the distribution data is related (matches the distribution destination).

(2) No Response Processing Although the data could be completely received, the distribution data was not relevant (does not match the distribution destination). Or some data was missing. Alternatively, a failure occurred in the receiving antenna or the like, and it was not possible to recognize that the data was distributed.

A response of the reception status is returned to the UPLINK station 30 only in the case of (1). Each receiving terminal device 40 has a unique terminal ID based on the identification number of the IC card to be mounted, similarly to the related art.

The relay device 50 is a computer having a server function. Based on the contents transmitted from the customer request source terminal device 10 and the fulcrum number list information to which the contents are distributed, a designated receiving terminal device 40 is designated. It has a function of creating content for distribution to be distributed to. Because of this,
The relay device 50 has a collation table for collating the branch number and the corresponding terminal ID, and based on the collation table, the customer request source terminal device 10 and the reception terminal device 40
It is configured so that the distribution destination information can be converted between the two. The relay device 50 also has a function of creating a distribution group header indicating to which group the distribution content is distributed. The created distribution content and distribution group header are stored in the distribution content file 52 and the distribution group header file 54, respectively. In addition, the relay device 50
It has a distribution result file 56 that acquires and stores information on distribution results stored in the distribution result storage file 32 of the K station 30. The storage information of the distribution result file 56 is configured to be converted with reference to the collation table and transmitted to the customer request source terminal device 10.

Further, the relay device 50 has a monitoring function of monitoring the connection status of the network line with the customer request source terminal device 10 and controls post-processing of the combined file transmitted based on the monitoring function. File control function. The monitoring function is performed by the customer request source terminal 10.
If the network line between is in a connected state and detects a line disconnection, it recognizes the last file in the combined file sent out on that line as a delivery file, refers to the file size of the combined header, This is to determine whether or not the data has been normally received. If it is determined by this monitoring function that the reception was performed normally, the file control function
Regarding the received combined file, control is performed to start post-processing such as creation of the above-described distribution file. The post-processing is controlled so as not to be started, and this is notified to the customer request source terminal device 10.

The operation / action of the above configuration will be described below with reference to the drawings.

When the content to be distributed and the distribution destination of the content are determined on the customer request source terminal device 10 side,
The corresponding information is extracted, and the contents are transmitted to the relay device 50 together with the branch number list information to be the distribution destination by FTP (Fi
le Transfer Protocol) (step S302 in FIG. 3). In response, the relay device 50 determines to which group the transmitted information belongs, based on the type of the customer request source terminal device 10, and creates a distribution group header indicating the distribution destination group information.
At the same time, by referring to the collation table, the branch number information contained in the branch number list information is converted into a terminal ID, a distribution destination header is created, and the contents are combined with the contents to create distribution contents (step S304). Then, the relay device 50 transmits the content for distribution together with the received distribution group header to the UPLINK station 30 by FTP (step S306).

The UPLINK station 30 simultaneously transmits the received distribution content including the distribution destination header to a group of the receiving terminal devices 40 belonging to the designated group 400 based on the distribution group header via the satellite line (step S3).
08).

The transmitted contents for distribution are received by the receiving terminal devices 40 belonging to the group 400 (step S310). Here, the receiving terminal device 40
Then, the following processing is performed. That is, first, it is determined whether or not the received content for distribution is data relating to itself (step S312). This is a determination by referring to the distribution destination header to determine whether the received distribution content specifies itself as the distribution destination. If it is determined that the data has been designated for distribution to itself, that is, it is related data (YE in step S312).
S), the receiving terminal device 40 decrypts the content of the content for distribution (step S314). On the other hand, when it is determined that the received distribution content is not related (NO in step S312), the distribution content is discarded or invalidated (step S312).
316), so that the user of the receiving terminal device 40 cannot see the data.

By the way, in the receiving terminal device 40, the reception status of the distribution content transmitted as described above /
The following processing is performed for the state (reception status).

When the receiving terminal device 40 has completely successfully received the content for distribution (YES in step S402 and YES in S404 in FIG. 4), the received content is related to the receiving terminal device 40 itself (depending on the distribution destination). It is determined whether or not they match (step S40).
6). If it is related (YE in step S406)
S), and sends to the UPLINK station 30 a reception signal indicating that the designated content has been distributed via the ISDN (step S408). On the other hand, if it is not related (NO in step S406), the received content is discarded or invalidated, and no response is made to the UPLINK station 30 (step S410).

In step S404, if the data could not be completely received, that is, if some information was lost (NO in step S404), the above-mentioned "step S406
No response is made to the UPLINK station 30 (step S410).

If no reception has been made (NO in step S402), no response is made to the UPLINK station 30 (step S41).
0).

A signal indicating that the content for distribution has been received as in “YES in step S406” is sent to the UPL
When the INK station 30 receives the signal, the signal is stored in the distribution result storage file 32 (Step S502 in FIG. 5).
Then, when a predetermined time has elapsed since the relay device 50 transmitted the content for distribution, the relay device 50 acquires the information stored in the distribution result storage file and stores the information in the distribution result file 56 (step S504). Since the stored reception confirmation information is in a form based on the terminal ID, a conversion process is performed by referring to the collation table to determine which branch has reliably received the distribution content (step S50).
6), the reception confirmation information is transmitted to the customer request source terminal device 1 by FTP.
0 (step S508). Thereby, the customer request source terminal device 10 can grasp the reception status of the distribution content. Note that, for the receiving terminal device 40 to which the distribution content has not arrived as specified, the content is retransmitted, for example, via a ground line.

Next, a case where the customer request source terminal device 10 transmits a plurality of contents to the receiving terminal group 400 at one time will be described. When the user successively specifies the distribution destination and the content, the customer request source terminal device 10
One file is created by automatically linking the content and the distribution destination information corresponding to the content (FIG. 6).
Step S602). When the linking process is completed, a linking header describing linking information such as a file size is created to identify a plurality of contents, and added to the head of the linking file (step S604). Thus, the combined file is completed, and a plurality of contents for distribution and a distribution destination information file are transmitted to the relay device 50 as one file (step S606).

The combined file transmitted in this manner is received by the relay device 50 (step S702 in FIG. 7). Then, the monitoring function of the relay device 50 first determines whether or not the reception is successful with reference to the combined header (step S704). If the reception is successful (YES in step S704), the process proceeds to a series of processes such as the process of the distribution content (step S706). If the reception has failed (NO in step S704), an error notification indicating that the reception has failed is returned to the customer request source terminal device 10 (step S708).

As described above, according to the present embodiment, the relay device 50 combines the detailed distribution destination information from the customer with the content as a distribution destination bedder to create a distribution content, and distributes this to the UPLINK station 30. Therefore, it is possible to select the content on the receiving terminal device 40 and to perform detailed destination designation distribution. Also, even if the receiving terminal device 40 has successfully received the entire distribution content including the distribution destination header, it does not respond to the reception status according to the content of the distribution header, and recognizes that the UPLINK station 30 has “reception failure”. Can be done. In addition, the communication cost at the time of grouping can be reduced as compared with the related art in which the response content is determined based on the reception status of the entire data. Further, the management of the receiving terminal device 40 is generally performed based on the terminal ID. However, since this ID is different from the store number in which the user actually manages the branch, the user can designate the destination and specify the destination. Verification of distribution results has been difficult in the past. However, by providing the relay device 50 of the embodiment of the present invention with the conversion function, it is possible to specify the destination and verify the distribution result without making the user aware of the terminal ID. Further, the distribution destination and the content can be freely changed on the customer request source terminal device 10 side.

Further, according to the present embodiment, the header information necessary for transmitting the distribution request and the distribution content are combined, and a format for combining a plurality of the distribution request files is created, so that the plural distribution requests are transmitted. One combined file, that is, one that can be transmitted in one operation. This makes it possible to simplify the distribution request sequence and easily transmit the distribution request in a short time. In addition, by providing a mechanism for detecting a line disconnection, conventional command execution for requesting the start of a distribution request can be omitted, and the burden on the user and the like can be reduced.

The function of the relay device 50 according to the embodiment of the present invention is the same as that of the customer request source terminal device 10 or the UP.
Needless to say, it may be mounted on the LINK station 30. or,
The function may be stored in a computer-readable storage medium as program information, and a computer equipped with the storage medium may execute the function.

[0051]

As described above in detail, according to the present invention, the distribution destination of the content can be easily changed by the user.
Excellent operability. Moreover, the ID of the conventional receiving terminal device side
It is possible to provide an extremely effective system that can be realized without changing the contents and the like, and that the distribution status of the distribution contents can be easily and reliably confirmed.

According to the present invention, a plurality of distribution requests can be automatically sent at once without imposing any burden on the user, and the operation is remarkably improved.

[Brief description of the drawings]

FIG. 1 is a diagram showing a schematic configuration of a system according to an embodiment of the present invention.

FIG. 2 is an exemplary view conceptually showing the configuration of a combined file according to the embodiment.

FIG. 3 is an exemplary flowchart showing a flow of transmission processing of the content for distribution according to the embodiment;

FIG. 4 is an exemplary flowchart showing a flow of a process of receiving distribution content according to the embodiment;

FIG. 5 is an exemplary flowchart showing a flow of a reception status process of the content for distribution according to the embodiment;

FIG. 6 is an exemplary flowchart showing the flow of a combined file creation process according to the embodiment;

FIG. 7 is an exemplary flowchart showing the flow of a process of receiving a combined file transmitted according to the embodiment;

FIG. 8 is a diagram showing a schematic configuration of a conventional satellite data distribution system.

[Explanation of symbols]

10: Customer request source terminal device, 12: Content file, 14: Delivery destination file, 20: Artificial satellite, 30: U
PLINK station, 40: receiving terminal device, 50: relay device.

 ────────────────────────────────────────────────── ─── Continuing on the front page (72) Inventor Yasuhiro Saeki 2-9-9, Suehirocho, Ome-shi, Tokyo F-term in the Toshiba Ome Plant 5B082 AA11 AA13 CA07 EA07 GC04 HA05 HA08 5B089 GA11 GA21 HA12 JA33 JB22 KA01 KB06 KH03 5K067 BB21 EE02 EE07 EE16 FF02 HH11 5K072 AA18 BB02 BB22

Claims (18)

[Claims] 1. A first terminal device having various contents and distribution destination information of the content, and the content and distribution destination information transmitted from the first terminal device are received via a ground line and received. A data distribution service system comprising: a base station for transmitting information on a satellite line based on distribution destination information; and a plurality of second terminal devices for receiving the content information transmitted from the base station via the satellite line. In the above, when a plurality of the contents and the distribution destination information for distributing the contents to the second terminal device are specified, the contents and the corresponding distribution destination information are connected to form a combined file. A connection file creation means for creating connection information relating to the connection and adding the connection information to the connection file, provided in the first terminal device; Station, a data distribution service system characterized in that the binding file created by the combined file creating means via the satellite line so as to transmit to said second terminal equipment. 2. A means for determining the transmission state by referring to the connection information of the connection file created and transmitted by the connection file creation means, and a process relating to the connection file based on the determination by the means. 2. The data distribution service system according to claim 1, further comprising: means for determining 3. A setting means for arbitrarily changing setting of distribution destination information for distributing contents of the first terminal device to the second terminal device, and a distribution destination set by the setting device. 3. The data distribution service system according to claim 1, further comprising a creating unit configured to combine information and the content to create a content for distribution. 4. The apparatus according to claim 3, wherein the second terminal device includes a determination unit that determines whether the received content for distribution is information relating to the second terminal device. Data distribution service system. 5. When the determination means of the second terminal device determines that the content for distribution is related to the terminal device, a decryption means for decrypting the content for distribution is provided. The data distribution service system according to claim 4, wherein 6. The second terminal device further comprises means for returning a response signal indicating that the distribution content has been received, when the distribution content has been completely decrypted by the decryption means. The data distribution service system according to claim 5, wherein 7. The second terminal device includes a unit for invalidating or discarding the distribution content when the determination unit determines that the distribution content is irrelevant to the terminal device. 5. The data distribution service system according to claim 4, wherein: 8. The second terminal device, when determining that the distribution content is irrelevant to the terminal device,
8. The data distribution service system according to claim 4, further comprising means for controlling not to execute a reply process indicating that the content has been received. 9. The method according to claim 1, wherein the creating means for creating the distribution content includes means for comparing / converting the distribution destination information with corresponding authentication information specific to the second terminal device. The data distribution service system according to claim 4, claim 5, claim 6, claim 7, or claim 8. 10. A first terminal device having various contents and distribution destination information of the contents, and receiving the contents and distribution destination information transmitted from the first terminal device via a ground line and receiving the contents. A data distribution service system comprising: a base station for transmitting information on a satellite line based on distribution destination information; and a plurality of second terminal devices for receiving the content information transmitted from the base station via the satellite line. In the data distribution control management method, when a plurality of contents of the first terminal device and distribution destination information for distributing the contents to the second terminal device are specified, the contents and the corresponding distribution The linked information is linked together to form a combined file, linked information relating to the link is created and added to the linked file, Data transmission control and management method using a satellite line, wherein the data is transmitted simultaneously from the base station to the second terminal device via the satellite line. 11. The system according to claim 10, wherein the transmission status is determined by referring to the connection information of the connection file transmitted, and processing for the connection file is determined based on the determination. Data distribution control management method using the satellite line described. 12. The destination information for distributing the content of the first terminal device to the second terminal device can be arbitrarily set, and the arbitrarily set distribution destination information and the content can be changed. 12. The data distribution control management method using a satellite line according to claim 10, wherein the distribution contents are created by performing a merging process. 13. The satellite line according to claim 12, wherein the second terminal device determines whether the received content for distribution is information relating to the second terminal device. Data distribution control management method. 14. When the second terminal device determines that the content for distribution is related to the terminal device, the second terminal device controls to decrypt the content for distribution. Item 14. A data distribution control management method using a satellite line according to Item 13. 15. The system according to claim 14, wherein the second terminal device issues a response signal indicating that the distribution content has been received when the distribution content has been completely decrypted. A data distribution control management method using a satellite line. 16. The method according to claim 16, wherein the second terminal device invalidates or discards the distribution content when it determines that the distribution content is irrelevant to the terminal device. 14. The data distribution control management method using a satellite line according to claim 13. 17. The second terminal device, when determining that the distribution content is not related to the terminal device, controls the second terminal device not to execute a reply process indicating that the content has been received. A data distribution control management method using a satellite line according to claim 13 or 16. 18. The method according to claim 13, wherein when the distribution content is created, the distribution destination information is matched / converted with the corresponding authentication information specific to the second terminal device. , Claim 14, Claim 1
A data distribution control management method using a satellite line according to claim 16 or claim 17.