JPH11340975A - Same data distribution method to plural terminals and data distribution system device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a same data distribution method to plural terminals at a low cost without providing newly an interface for communication purpose at each terminal with a small scale installation even in the case that data are distributed to plural terminals placed at a remote place and to provide a data distribution system device. SOLUTION: The system is provided with terminals T1-TN that receive distribution data (a), a data broadcast device B that distributes the distribution data (a) substantially in response to an access from the terminals T1-TN, and a data distribution center A that sends a source of the distribution data (a) to the data broadcast device B and sends information by which the terminals T1-TN receiving the distribution data can access the data broadcast device B.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and an apparatus for distributing the same data to a plurality of terminals, which enables small-scale, short-time and inexpensive data distribution from a data distribution center to the plurality of terminals. Things. This is particularly effective when a plurality of terminals are installed at remote locations.

[0002]

2. Description of the Related Art Conventionally, as a method of distributing the same data to a plurality of terminals installed in remote locations in a short time, communication facilities corresponding to the number of terminals simultaneously and directly connected to a data distribution center are provided. One-to-one communication with each terminal had to be performed sequentially. However, in such a method, as the number of terminals increases, communication equipment is inevitably increased in order to perform processing in a short time, and it has been difficult to realize the entire system at low cost and small size.

Therefore, as an improvement method, a number of methods using wireless or LAN have been proposed (for example, see Japanese Patent Application Laid-Open No.
321768, JP-A-10-65633, etc.).

[0004] In these methods, a data distribution center is provided with communication equipment such as a wireless or LAN for transmitting distribution data in a broadcast format, and the distribution data is transmitted to the data distribution center using various types of data necessary for a receiving side. Information-transmitted in a broadcast format including information such as a code for identifying a data delimiter and an error detection code for confirming the normality of transfer data.

On the other hand, a terminal on the receiving side is provided with a facility for receiving broadcast information including distribution data broadcasted on a wireless or LAN, and receives distribution data by identifying a delimiter from the received broadcast information. At the same time, the normality of the distribution data itself received from the error detection code is determined.

[0006]

The above-mentioned improvement method of the prior art is, for example, when the terminal to which data is to be distributed is limited to some extent, for example, in the same radio wave area or in the same LAN.
If the terminal is installed in a wide area, it is effective, but if the terminals are installed in a wide variety of locations, the data distribution of the frequency bands in all wireless areas or channels in the LAN area to which all these terminals belong is performed. It is used only for terminals belonging to the system, and is substantially difficult to realize. Even if it could be realized, there was a problem that the cost would be high.

In addition, before and after actual data distribution, when it is necessary to notify a terminal of a transmission request or the like, or to notify a terminal of a notification procedure of various information such as a designation of a channel and a time, the data is transmitted. The distribution system has a drawback that a communication interface must be provided separately from communication facilities such as wireless and LAN in order to mutually transmit and receive signals between the data distribution center and the terminal.

Here, the main objects to be solved by the present invention are as follows. That is, a first object of the present invention is to provide a method and an apparatus for distributing the same data to a plurality of terminals which enable simultaneous data distribution on the data distribution center side at low cost even when the installation locations of the terminals are diversified. Is to be provided.

A second object of the present invention is to provide a method and system for distributing the same data to a plurality of terminals which do not need to have a new interface for communicating with a simultaneous data distribution center. It is something you want to do.

[0010] A third object of the present invention is to provide a method and apparatus for distributing the same data to a plurality of terminals, which can perform small-scale simultaneous data distribution from a data distribution center to a plurality of terminals via an intermediate data broadcasting device. Is to be provided.

Other objects of the present invention will become apparent from the description of the specification, the drawings, and particularly from the claims.

[0012]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, according to the method of the present invention, when distributing data to a plurality of terminals, the data is transmitted to relay means accessible from each terminal, and the data is transmitted from the distribution means to the relay means. While transmitting, the distribution unit directly notifies each terminal to be distributed of access information to the relay unit from the terminal, and then each terminal receiving the notification accesses the relay unit and It has the feature of receiving data individually.

[0013] The device of the present invention solves the above problems.
A terminal that receives the distribution data, a relay unit that substantially distributes the distribution data to each terminal in response to access from the terminal, and transmits the source of the distribution data to the relay unit and receives the distribution. Data distribution means for directly transmitting information enabling access to the relay means to each terminal;
It has the feature of having.

More specifically, in solving the problem, the present invention achieves the above object by adopting a novel characteristic configuration method and means ranging from a high-level concept to a low-level concept listed below. It is done as follows.

A first feature of the method of the present invention is that when the same data is distributed from a distribution unit to a plurality of terminals, the data is temporarily relayed on the way without being directly distributed from the distribution unit to the plurality of terminals. The present invention resides in adopting a configuration of a method of distributing the same data to a plurality of terminals, wherein the same data is simultaneously or concurrently received for each terminal from the relay unit which is stored in the means and accessed by each terminal.

According to a second feature of the method of the present invention, when the same data is distributed from the distribution means to a plurality of terminals, the data is transmitted from the distribution means to the relay means which can access the data from each terminal. At the same time, the distribution unit first notifies the terminal to which the access information from each terminal to the relay unit is to be distributed to the terminal to be distributed, and the terminal receiving the notification accesses the relay unit thereafter. And a method of distributing the same data to a plurality of terminals receiving the data.

According to a third feature of the method of the present invention, in the first or second feature of the method of the present invention, after the relay unit receives the data from the distribution unit, the terminal sets the relay unit to Another aspect of the present invention resides in adopting a configuration of a method of distributing the same data to a plurality of terminals multiplexed so that they can be received when accessed.

According to a fourth feature of the method of the present invention, the reception in the second or third feature of the method of the present invention is performed to a plurality of terminals which are simultaneously connected to the relay means by a plurality of terminals. In the same data distribution method.

A fifth feature of the method of the present invention is that the notification in the second, third or fourth feature of the method of the present invention is as follows:
An object of the present invention is to adopt a configuration of a method of distributing the same data to a plurality of terminals performed over a public communication line.

A sixth feature of the method of the present invention resides in that the transmission in the second, third, fourth or fifth feature of the method of the present invention is transmitted to a plurality of terminals through a public communication line. The configuration of the data distribution method is adopted.

A seventh feature of the method of the present invention is that the transmission in the second, third, fourth, fifth or sixth feature of the method of the present invention is performed to a plurality of terminals in which the transmission is performed through a dedicated line. In the same data distribution method.

An eighth feature of the method of the present invention is that the relay means in the first, second, third, fourth, fifth, sixth or seventh feature of the method of the present invention is plural. The present invention resides in adopting the configuration of the same data distribution method to terminals.

A ninth feature of the method of the present invention is that the data in the first, second, third, fourth, fifth, sixth, seventh or eighth feature of the above-described method of the present invention is that The present invention employs a configuration of a method of distributing the same data to a plurality of terminals, which is encrypted by means and decrypted by each terminal.

The tenth feature of the method of the present invention is that the transmission and reception in the first, second, third, fourth, fifth, sixth, seventh, eighth or ninth features of the above-described method of the present invention. The above-mentioned reception is configured to adopt a configuration of a method of distributing the same data to a plurality of terminals, the method being executed including parity information for judging the normality of the distribution status.

An eleventh feature of the method of the present invention resides in that the parity information in the tenth feature of the present invention is selected from an even parity, an odd parity, and a frame check sequence using a cyclic code according to an application. In the same data distribution method to a plurality of terminals.

The twelfth feature of the method of the present invention is that the second, third, fourth, fifth, sixth, seventh, eighth, ninth, tenth, or eleventh feature of the method of the present invention described above. The access information includes information on the implementation of data distribution, and the configuration of the same data distribution method to a plurality of terminals is adopted.

The thirteenth feature of the method of the present invention is that the method of the present invention is the second, third, fourth, fifth, sixth, seventh, eighth, ninth, tenth, eleventh, or twelfth. The method is characterized in that the access information is the minimum access information necessary for the terminal to be able to receive the data from the relay means, and the same information is distributed to a plurality of terminals.

A fourteenth feature of the method of the present invention resides in that the minimum access information in the thirteenth feature of the method of the present invention is transmitted to a plurality of terminals including a relay address when the terminal receives the data. It is in the adoption of the same data distribution method configuration.

A fifteenth feature of the method of the present invention is that the minimum access information according to the thirteenth feature of the present invention employs a configuration of a method of distributing the same data to a plurality of terminals, the information including information on an encryption method. It is in.

A sixteenth feature of the method of the present invention resides in that the information on the encryption method in the fifteenth feature of the method of the present invention is an encryption key and a configuration of a method of distributing the same data to a plurality of terminals, which is an encryption method. is there.

A seventeenth feature of the method of the present invention resides in that the minimum access information in the thirteenth feature of the method of the present invention comprises information on a time and a time at which the terminal can receive from the relay means. The present invention resides in adopting the configuration of the same data distribution method to a plurality of terminals.

An eighteenth feature of the method of the present invention resides in that the parity information in the tenth or eleventh feature of the present invention is characterized in that a result of judging the normality of the data received by the terminal is represented by the access information. And a method of distributing the same data to a plurality of terminals, which is sent back to the distribution means as a report using the same line used when the notification is made.

A nineteenth feature of the method of the present invention resides in a method of distributing the same data to a plurality of terminals, wherein the report in the above-mentioned eighteenth feature of the present invention is returned only when the terminal determines that the report is abnormal. Configuration adoption.

A twentieth feature of the method of the present invention resides in a method of distributing the same data to a plurality of terminals, wherein the report according to the eighteenth or nineteenth feature of the method of the present invention is stored and managed in the distributing means. In the configuration adoption.

A twenty-first feature of the method of the present invention is that the report in the eighteenth, nineteenth, or twentieth feature of the above-described method of the present invention is determined by the delivery means on the status of delivery to each terminal. If the delivery status is not normal,
The present invention resides in adopting a configuration of a method of distributing the same data to a plurality of terminals that becomes data for redistributing data again only to the terminal that has received abnormal data.

A twenty-second feature of the method of the present invention resides in that the redistribution in the above-mentioned twenty-first feature of the method of the present invention is performed via the same line used when the access information is directly notified from the delivery means to the terminal. In the same data distribution method to a plurality of terminals.

On the other hand, a first feature of the system apparatus of the present invention is that each terminal for receiving distribution data, a data broadcasting device for substantially distributing distribution data in response to access from each terminal, A data distribution center that transmits the base of the distribution data to the device and directly transmits access information enabling access to the data broadcasting device to each terminal receiving the distribution. is there.

[0038] A second feature of the system device of the present invention is that the data distribution center in the first feature of the system device of the present invention includes an input address storage unit for storing an address of the data broadcasting device, A line interface unit for performing line connection, a broadcast information transmitting unit for connecting to the data broadcasting device and transmitting broadcast information, a broadcast information generating unit for converting the distribution data into the broadcast information and outputting the broadcast data to the broadcast information transmitting unit; Command transmission means for notifying each terminal of the access information as a command,
In the configuration of a data distribution system device comprising:

A third feature of the system device of the present invention resides in that the data broadcasting device according to the first or second feature of the system device of the present invention is connected to the data distribution center via a line and receives broadcast information. Receiving means, broadcast information multiplexing means for multiplexing the broadcast information from the broadcast information receiving means, and having a broadcast address capable of identifying the data broadcast device itself and communicating calls from the plurality of terminals; And a public communication line plural simultaneous connection interface means for receiving a connection via a line and making a line connection.

A fourth feature of the system device of the present invention is that the terminal in the first, second or third feature of the above-mentioned system device of the present invention directly receives the command from the data distribution center and executes the data broadcasting. Data comprising: a line interface means for calling and connecting to an apparatus to receive the broadcast information from the data broadcasting apparatus; and a command receiving means for receiving the access information as the command through the line interface means. The configuration of the distribution system apparatus is adopted.

A fifth feature of the system device of the present invention is that the data distribution center according to the first, second, third or fourth feature of the system device of the present invention is characterized in that the data distribution center stores the distribution data before distribution. The present invention resides in a configuration adoption of a data distribution system device including a data storage unit.

A sixth feature of the system device of the present invention is that the first, second, third, fourth or fifth of the system device of the present invention described above.
Wherein the terminal has a broadcast address storage means for storing a broadcast address for specifying the data broadcast apparatus from the terminal and providing the broadcast address to the line interface means.

A seventh feature of the system device of the present invention is that the data distribution center in the first, second, third, fourth, fifth or sixth feature of the above-mentioned system device of the present invention is such that the data broadcasting device And a distribution data encrypting unit including a distribution data encrypting unit for encrypting the distribution data from the distribution data storage unit and transmitting the encrypted data to the broadcast information creating unit when transmitting the distribution data. .

An eighth feature of the system apparatus of the present invention is that the data distribution center according to the seventh feature of the system apparatus of the present invention is arranged such that the distribution data encrypting means converts the distribution data into encrypted distribution data. The present invention resides in adoption of a configuration of a data distribution system device including an encryption key storage unit that stores an encryption key and also provides the encryption key to the command transmission unit.

A ninth feature of the system device of the present invention is that the second, third, fourth, fifth, sixth,
The data distribution center according to the seventh or eighth aspect,
The present invention is to adopt a configuration of a data distribution system device including a distribution data parity creation unit that creates a parity for determining the normality of the distribution status to the terminal and provides the parity to the broadcast information creation unit.

A tenth feature of the system apparatus of the present invention resides in that, in the ninth feature of the system apparatus of the present invention, the terminal further comprises a broadcast information separating unit for separating the parity from the broadcast information received by the line interface unit. The present invention resides in adoption of the configuration of the data distribution system device provided.

An eleventh feature of the system device of the present invention resides in that the terminal according to the tenth feature of the system device of the present invention is arranged such that the terminal separates the normality of the distribution status from the broadcast information by the broadcast information separating means. And a data distribution system device including a reception result discriminating means for outputting a discrimination result.

A twelfth feature of the system device of the present invention resides in that the terminal according to the eleventh feature of the system device of the present invention receives the determination result from the reception result determination means and reports the reception result as a report. The present invention is characterized by adopting a configuration of a data distribution system device including a report transmission means for sending a reply to the data distribution center via the line interface means.

A thirteenth feature of the system device of the present invention is that the report transmission means in the eleventh feature of the system device of the present invention creates a report based on the reception result only when the reception result is abnormal. The present invention resides in the adoption of a configuration of a data distribution system device which returns a response to a distribution center via the line interface means.

A fourteenth feature of the system device of the present invention is that the ninth, tenth, eleventh or first feature of the system device of the present invention described above.
In the second aspect, the terminal adopts a configuration of a data distribution system apparatus including a distribution data decrypting unit that decrypts encrypted distribution data separated from the broadcast information by the broadcast information separating unit.

A fifteenth feature of the system device of the present invention is that the tenth, eleventh, twelfth and first features of the system device of the present invention are described above.
In the third or fourteenth aspect, the terminal adopts a configuration of a data distribution system device including a distribution data storage unit that stores the distribution data separated from the broadcast information by the broadcast information separation unit.

According to a sixteenth feature of the system device of the present invention, in the fourteenth feature of the system device of the present invention, the terminal uses the encryption key from the command receiving unit to perform decryption by the distribution data decrypting unit. The present invention is to adopt a configuration of a data distribution system device including distribution data storage means for storing the distribution data obtained.

The seventeenth feature of the system device of the present invention is that
The data distribution center according to the fifth or 16th aspect is characterized in that the data distribution center includes a report receiving means for receiving the report through the line interface means.

An eighteenth feature of the system device of the present invention resides in that, in the seventeenth feature of the system device of the present invention, the data distribution center includes a report storage unit for separately storing and managing the report received by the report receiving unit. The present invention resides in adoption of the configuration of the data distribution system device provided.

A nineteenth feature of the system device of the present invention is that the data distribution center according to the seventeenth or eighteenth feature of the system device of the present invention is arranged such that the data distribution center transmits to the terminal based on the report received by the report receiving means. In the data distribution system apparatus separately provided with means for determining

According to a twentieth feature of the system device of the present invention, the data distribution center in the seventeenth, eighteenth, or nineteenth feature of the system device of the present invention determines that distribution is abnormal to the terminal by determining distribution to the terminal. If you do
The present invention resides in adopting a configuration of a data distribution system device separately provided with redistribution means for redistributing to the terminal.

The twenty-first feature of the system device of the present invention is that the third, fourth, fifth, sixth, seventh, eighth, ninth, tenth, eleventh, twelfth, twelfth, An information storage unit in which the data broadcasting device according to the thirteenth, fourteenth, fifteenth, sixteenth, seventeenth, eighteenth, nineteenth, or twentieth feature temporarily stores the broadcast information received by the broadcast information receiving unit The configuration of a data distribution system device that is separately provided.

The twenty-second feature of the system device of the present invention is that the first, second, third, fourth, fifth, sixth, seventh, eighth, ninth, tenth, tenth, and tenth aspects of the system device of the present invention described above. Eleventh, first
2, thirteenth, fourteenth, fifteenth, sixteenth, seventeenth, first
In the eighth, nineteenth, twentieth or twenty-first feature, the terminal and the data distribution center, and the configuration of a data distribution system device in which the terminal and the data broadcasting device are connected by a public communication line.

The twenty-third feature of the system device of the present invention is that the first, second, third, fourth, fifth, sixth, seventh, eighth, ninth, tenth, and tenth aspects of the system device of the present invention are described above. Eleventh, first
2, thirteenth, fourteenth, fifteenth, sixteenth, seventeenth, first
An eighth, nineteenth, twentieth, twenty-first, or twenty-second feature of the present invention resides in adoption of a configuration of a data distribution system device in which the data broadcasting device and the data distribution center are connected by a public communication line.

The twenty-fourth feature of the system device of the present invention is that the first, second, third, fourth, fifth, sixth, seventh, eighth, ninth, tenth, and tenth aspects of the system device of the present invention described above. Eleventh, first
2, thirteenth, fourteenth, fifteenth, sixteenth, seventeenth, first
An eighth, nineteenth, twentieth, twenty-first, twenty-second, or twenty-third feature of the present invention resides in adoption of a configuration of a data distribution system device in which the data broadcasting device and the data distribution center are connected by a dedicated line.

A twenty-fifth feature of the system device of the present invention resides in the adoption of a configuration of a data distribution system device in which the public communication line in the twenty-third or twenty-fourth feature of the above-described system device of the present invention is an analog telephone line.

A twenty-sixth feature of the system device of the present invention resides in adoption of a configuration of a data distribution system device in which the public communication line is an ISDN line in the twenty-third or the twenty-fourth feature of the system device of the present invention.

A twenty-seventh feature of the system device of the present invention resides in that the data distribution center according to the twenty-sixth feature of the system device of the present invention is arranged such that the data distribution center performs an ITU-
Recommendation T. Q. The present invention is to adopt a configuration of a data distribution system device connected to each of the terminals via the public communication line performed using the user information specified in 931.

A twenty-eighth feature of the system apparatus of the present invention is that the first, second, third, fourth, fifth, sixth, seventh, eighth, ninth, tenth, and tenth aspects of the system apparatus of the present invention described above. Eleventh, first
2, thirteenth, fourteenth, fifteenth, sixteenth, seventeenth, first
8, 19th, 20th, 21st, 22nd, 23rd, 2nd
The data broadcasting device according to the fourth, twenty-fifth, twenty-sixth, or twenty-seventh feature lies in adopting a configuration of a data distribution system device using a teledome.

[0065]

BRIEF DESCRIPTION OF THE DRAWINGS FIG.
An embodiment of the present invention will be described with respect to an example of an apparatus and an example of a method.

(Example of System Apparatus) FIG. 1 is a schematic diagram showing the overall configuration of a data distribution system apparatus α which is the apparatus of the present invention. The data distribution system device α includes a data distribution center A, a data broadcasting device B, a plurality of terminals T1, and a terminal T.
2, composed of terminals TN and connected via analog telephone lines L0 to Ln and a communication line Lw as shown in FIG.

FIG. 2 is a block diagram showing the internal configuration of the data distribution center A. The data distribution center A includes distribution data storage means A1, input address storage means A2, encryption key storage means A3, distribution data encryption means A4, distribution data parity creation means A5, broadcast information creation means A6, broadcast information transmission means A7, It comprises an analog telephone line interface means A8, a command transmitting means A9 and a report receiving means A10.

Each means of the data distribution center A will be described. The distribution data storage means A1 includes terminals T1,.
The distribution data a to be distributed to N is stored.

The input address storage means A2 stores an input address b by which the broadcast information transmitting means A7 can specify the data broadcasting device B. The input address b is information that allows the broadcast information transmitting means A7 to specify the data broadcast device B via the communication line Lw. For example, as a communication line Lw,
When an analog telephone line is used, the input address b corresponds to a telephone number. When a dedicated line is used, it is necessary to use a line that can communicate with the data broadcasting device B.
However, it is practically unnecessary.

The encryption key storage means A3 stores an encryption key c used when encrypting the distribution data a. The distribution data encryption unit A4 encrypts the distribution data a stored in the distribution data storage unit A1 with the encryption key c stored in the encryption key storage unit A3 by a predetermined method, and encrypts the distribution data a. d. Although there is no limitation on the encryption method, it goes without saying that the encryption method must be a method corresponding to the distribution data decryption means t5 described later provided in the terminals T1 to TN.

The distribution data parity creating means A5 creates a parity e for detecting an error on the receiving side by a predetermined method based on the encrypted distribution data d. As an example of the parity e, a simple one such as an even parity or an odd parity, a frame check sequence using a cyclic code, or the like can be appropriately selected and used according to the application.

The broadcast information creating means A6 is based on the encrypted delivery data d encrypted by the delivery data encrypting means A4 and the parity e created by the delivery data parity creating means A5. The broadcast information f to be transmitted to is created. An example of the broadcast information f has a frame configuration as shown in FIG.

The broadcast information transmitting means A7 is connected to the data broadcasting device B specified by the input address b via the communication line Lw.
To transmit the broadcast information f. The analog telephone line interface means A8 transmits the command g from the command transmission means A9 and receives the report h from each of the terminals T1 to TN via the analog telephone line L0.

The command transmission means A9 uses the information including the encryption key c stored in the encryption key storage means A3 as a command g via the analog telephone line interface means A8, the analog telephone line L0, and the analog telephone lines L1 to Ln. , To each terminal T1 to TN. Report receiving means A
10 receives the report h including the result of receiving the distribution data a from each of the terminals T1 to TN.

FIG. 4 is a block diagram showing the internal configuration of the data broadcasting device B. It comprises a broadcast information receiving means B1, a broadcast information multiplexing means B2, and a plurality of analog telephone line simultaneous connection interface means B3.

Next, each means of the data broadcasting device B will be described. The broadcast information receiving means B1 receives the broadcast information f transmitted from the data distribution center A via the communication line Lw. The broadcast information multiplexing means B2 transmits the broadcast information f received by the broadcast information receiving means B1 to a plurality of simultaneously connected terminals T1 to TN.
Multiplexing for transmission to Here, the multiplexing means that one broadcast information f received by the broadcast information receiving means B1 is in a state that can be distributed to each terminal T1 to TN, that is, a plurality of broadcast information f.

The analog telephone line plural simultaneous connection interface means B3 connects the calls from the plurality of terminals T1 to TN to the incoming call received via the analog telephone line Lw, and sends it to the broadcast information multiplexing means B2. The broadcast information f for each terminal T1...

FIG. 5 is a block diagram showing the internal configuration of the terminals T1 to TN. The terminals T1 to TN include a broadcast address storage unit t1, an analog telephone line interface unit t2, a command reception unit t3, a broadcast information separation unit t4, a distribution data decoding unit t5, a distribution data storage unit t6, a reception result determination unit t7, It comprises a report transmission means t8.

The means of the terminals T1 to TN will be described. The broadcast address storage means t1 stores the broadcast address i by which the analog telephone line interface means t2 can specify the analog telephone line plural simultaneous connection interface means B3 of the data broadcasting device B. Here, the broadcast address i is information that allows the terminals T1 to TN to specify the data broadcasting device B via the analog telephone lines L1 to Ln, and the telephone numbers correspond to the analog telephone lines L1 to Ln.

Analog telephone line interface means t2
From the data distribution center A to the analog telephone lines L0 to L
n and the information including the encryption key c transmitted through the command g
As a result, a call j is made to the analog telephone line plural simultaneous connection interface means B3 of the data broadcasting device B designated by the broadcast address i stored in the broadcast address storage means t1, and the broadcast information f is received after the line connection. .

Further, the report h from the report transmitting means t8 is returned to the data transmission center A via the analog telephone lines L0 to Ln. The command receiving means t3 receives the command g including the encryption key c received from the data distribution center A via the analog telephone lines L0 to Ln and the analog telephone line interface means t2.

The broadcast information separating means t4 separates the encrypted distribution data d and the parity e constituting the broadcast information f.
The distribution data decrypting unit t5 converts the encrypted distribution data d separated by the broadcast information separating unit t4 into a command receiving unit t.
The decryption is performed with the encryption key c included in the command g received in Step 3 in accordance with a predetermined method. The decoding method is
Needless to say, this is a technique corresponding to the distribution data encryption unit A4 of the data distribution center A. The distribution data storage unit t6 stores the distribution data a decoded by the distribution data decoding unit t5.

The reception result discriminating means t7 includes the parity e separated by the broadcast information separating means t4 and the check parity generated from the encrypted distribution data d by the same method as the distribution data parity generating means A5 of the data distribution center A. By performing the comparison, the normality of the received encrypted distribution data d is determined, and the result is created as the determination result k. The report transmission means t8 returns the discrimination result k created by the reception result discrimination means t7 as the report h via the analog telephone line interface means t2 and the analog telephone lines L0 to Ln.

Although the example of the system apparatus of the present invention has been described above, the data distribution center A and each of the terminals T1 to TN do not require all of the above means. For example, if there is no need to perform encryption or parity check. No measures are required. In addition, description of general methods necessary for transmitting and receiving information, for example, modulation and demodulation, and adding appropriate delimiters to information is omitted.

Further, it can be appropriately changed according to the application.
For example, the number of the data broadcasting devices B is not necessarily one for the data distribution center A, but may be plural. The distribution data storage means A1 of the data distribution center A
It may be obtained by communication from outside the data distribution center A.

Data distribution center A, data broadcasting device B,
Each of the terminals T1 to TN may be appropriately provided with an input unit, a determination unit for determining the internal state of each terminal, an output unit, and the like. The data broadcasting device B may include a broadcast information storage unit for temporarily storing the broadcast information f received from the data distribution center A. Then, when the terminals T1 to TN access, they may be presented at a predetermined time period.

Further, needless to say, each of the terminals T1 to TN needs a storage data output unit so that the information stored in the distribution data storage means t6 can be viewed.
The system device α is a system device that enables data distribution to a plurality of terminals T1 to TN, but it goes without saying that distribution is possible by a similar operation even when the distribution partner is a single terminal.

(Example of Method) This example of the method corresponds to the above example of the system apparatus, and stores the information a stored in the distribution data storage means A1 of the data distribution center A into each terminal T1.
To TN is assumed. FIG. 6 shows the exchange of information between the data distribution center A, the data broadcasting device B, and the terminals T1 to TN at this time. This will be described with reference to FIGS.

First, the command transmitting means A9 outputs, to the analog telephone line interface means A8, access information necessary for calling j from each of the terminals T1 to TN to access the data broadcasting apparatus B as a command g. , The analog telephone line interface means A8 notifies each terminal T1 to TN of the command g (S11, S12,
... S1N).

Here, the access information includes a broadcast address i indicating to which data broadcasting device B the call j should be made, and an encrypted address when each of the terminals T1 to TN receives from the data broadcasting device B. In order to determine the normality of the encryption key c required for decrypting the encryption, information on the encryption method, and the broadcast information f received from the data distribution center A via the data broadcasting device B. The information about the parity e, the time for providing information such as when the call j is valid to the data broadcasting apparatus B, and the time required for receiving from the data broadcasting apparatus B such as the cycle when the broadcasting information f is repeated. Information, etc., and which information is included in the access information is determined by the distribution data a.
Alternatively, it can be appropriately changed by the data distribution system device α itself. In this embodiment, at least the encryption key c is included.

On the other hand, the distribution data encryption means A4 obtains the encryption key c from the encryption key storage means A3, obtains the distribution data a from the distribution data storage means A1, encrypts the data with the obtained encryption key c, and encrypts the encrypted distribution data. As d, it is input to the distribution data parity creating means A5 and the broadcast information creating means A6.

The distribution data parity creating means A5 creates the parity e, and the broadcast information creating means A6, which has obtained the broadcast information f, creates the broadcast information f based on the parity e and the encrypted delivery data d. The broadcast information transmitting means A7 having obtained the information f obtains the input address b from the input address storage means A2 and transmits the broadcast information f to the data broadcasting device B (S2).

In the data broadcasting device B, the broadcast information receiving means B1 receives the broadcast information f transmitted from the broadcast information transmitting means A7 of the data distribution center A, and the broadcast information multiplexing means B
Multiplex by 2. The multiplexing here means that the same distribution data a can be transmitted to a plurality of terminals T1 to TN that have accessed the analog telephone line simultaneous connection interface means B3.

On the other hand, the analog telephone line interface means t2 which has obtained the command g notified from the data distribution center A makes the command receiving means t3 determine the encryption key c and obtains the command g from the broadcast address storage means t1. Based on the broadcast address i, a call j is made to the analog telephone line plural simultaneous connection interface means B3 of the broadcast address i (S31, S32,... S3
N), a line connection is made with the analog telephone line plural simultaneous connection interface means B3 of the data broadcasting device B, and broadcast information f is obtained (S21, S22,... S2N).

Each of the terminals T1 to TN receives the broadcast information f
Is separated into the parity e and the encrypted distribution data d constituting the broadcast information f by the broadcast separating means t4. The encrypted distribution data d is decrypted by the distribution data decrypting unit t5 based on the encryption key c from the command receiving unit t3, and is stored as distribution data a in the distribution data storage unit t6. On the other hand, the parity e separated from the broadcast information separating unit t4 is sent to the reception result determining unit t7 together with the encrypted distribution data d, and determines the normality of the transmission state of the encrypted distribution data d (S41, S42,...). S4N).

The report transmission means t8 obtains the determined result k, and returns the distribution result as a report h to the data distribution center A which is the transmission source of the command g via the analog telephone line interface means t2. At this time, the report h can include information such as the normality of the distribution status and a request for re-distribution (S51, S52,... S5N).

Analog telephone line interface means A8 receiving distribution result report h from terminals T1 to TN
Is sent to and stored in the report receiving means A10. Thereby, the distribution status can be managed.

Although the embodiment of the present invention has been described with reference to the example of the apparatus and the example of the method, the present invention is not necessarily limited to the above-mentioned matter, and achieves the object of the present invention and has the following effects. Changes can be made as appropriate within the scope.

For example, the report h of the distribution result is transmitted from the terminals T1 to TN to the data distribution center A irrespective of whether the determination result k is correct or not. It is possible to transmit the report h only when k is abnormal.
Then, the data distribution center A receiving the report h,
It is also possible to determine the report h and redistribute it. In this case, the redistribution is performed on the analog telephone lines L0 to Ln.
Is also possible.

Although the distribution data a is encrypted and distributed, distribution can be performed without encryption, especially when there is no need to protect the distribution data a for security.

Furthermore, an encryption key c for encryption and decryption
Is included in the access information before data distribution, which enables dynamic transmission for each data distribution in the above-described embodiment.
1 to TN are installed in advance and fixedly operated, so that if security strength is sufficient, it is not necessary to include them from the viewpoint of reduction of communication cost.

In this embodiment, the data distribution center A
Although the data distribution function and the management function are realized in the same center, it is needless to say that the data distribution function and the management function can be separated and physically realized separately through a communication line or various interfaces. . Further, here, the broadcast address i is predetermined, and the procedure for specifying the access information before data distribution is not specified. However, a system that includes the broadcast address i as the access information may be used.

Note that the analog telephone line L0 of this embodiment is
Ln may be a public line such as an ISDN line.
The same applies to the communication line Lw. Here, communication between the data distribution center A and each of the terminals T1 to TN is based on ITU. Recommendation T. Q.
User information specified in 931 may be used.

[0104]

As described above, according to the present invention,
Even in the case where terminals are installed in various places, if each terminal can be connected by a public communication line,
Distribution data can be easily received.

As a concrete example of the data broadcasting apparatus B corresponding to the analog telephone line, a communication carrier is provided as a network service (for example, a teledome (multiple simultaneous multiple access) service provided by Nippon Telegraph and Telephone Corporation). Can be used at a lower cost as compared with a case where facilities capable of broadcasting in the same range of wireless or LAN are used.

Also, the terminal can transmit and receive commands and reports to and from the data distribution center during the idle time of the public communication line used to receive the data distribution from the data broadcasting device B. The terminal can be reduced in size and provided at low cost.

Furthermore, since the encryption key is transferred via the public communication line, there is an excellent effect such as another advantage that the distribution data is less likely to be illegally monitored as compared with a LAN or the like.

[Brief description of the drawings]

FIG. 1 is a block diagram showing the internal configuration of an example of a data distribution system apparatus according to an embodiment of the present invention.

FIG. 2 is a block diagram showing the internal configuration of a data distribution center according to the first embodiment.

FIG. 3 is an example of a frame configuration of broadcast information distributed using the above.

FIG. 4 is a block diagram showing the internal configuration of the data broadcasting device of the above.

FIG. 5 is a block diagram showing the internal configuration of the terminal in the above.

FIG. 6 is a sequence diagram of the same data distribution method showing the embodiment of the present invention.

[Explanation of symbols]

α: Data distribution system device A: Data distribution center A1: Distribution data storage means A2: Input address storage means A3: Encryption key storage means A4: Distribution data encryption means A5: Distribution data parity creation means A6: Broadcast information creation means A7 ... Broadcast information transmitting means A8 ... Analog telephone line interface means A9 ... Command transmitting means A10 ... Report receiving means B ... Data broadcasting device B1 ... Broadcast information receiving means B2 ... Broadcast information multiplexing means B3 ... Analog telephone line multiple simultaneous connection interface means T1 to TN terminal t1 broadcast address storage means t2 analog telephone line interface means t3 command reception means t4 broadcast information separation means t5 distribution data decoding means t6 distribution data storage means t7 reception result discrimination means t8 Report transmission means L0 to Ln ... Analog telephone line Lw ... communication line a ... distribution data b ... input address c ... encryption key d ... encrypted distribution data e ... parity f ... broadcast information g ... command h ... report i ... broadcast address j ... outgoing call k ... discrimination result

Claims (50)

[Claims] When the same data is distributed from a distribution means to a plurality of terminals, the data is temporarily stored in a relay means on the way without being directly distributed from the distribution means to the plurality of terminals. Receiving the access from the relay unit at the same time for each of the terminals at the same time or at any time. 2. When distributing the same data from a distribution means to a plurality of terminals, the data is transmitted from the distribution means to a relay means which can access the data from the terminals, and the distribution means first In addition, each terminal to which the access information from each terminal to the relay means is to be delivered is notified, and each terminal receiving the notification thereafter accesses the relay means to receive the data. The same data distribution method to multiple terminals. 3. The relay unit according to claim 1, wherein the relay unit multiplexes the data so that the relay unit that has received the data from the distribution unit can receive the data by each of the accessed terminals. The same data distribution method to multiple terminals as described. 4. The method according to claim 2, wherein the reception is performed by connecting a plurality of terminals to the relay means at the same time. 5. The method for distributing the same data to a plurality of terminals according to claim 2, wherein the notification is performed via a public communication line. 6. The method of delivering the same data to a plurality of terminals according to claim 2, wherein the transmission is performed by a public communication line. 7. The method according to claim 2, 3, 4, or 5, wherein the transmission is performed by a dedicated line. 8. The relay device according to claim 1, wherein said relay means is plural.
The same data distribution method to a plurality of terminals described in. 9. The apparatus according to claim 1, wherein said data is encrypted by said distribution means and decrypted by each terminal.
The same data distribution method to a plurality of terminals described in. 10. The transmission and reception according to claim 2, wherein the transmission and reception are performed including parity information for judging the normality of the distribution status. The same data distribution method to a plurality of terminals described in. 11. The same data to a plurality of terminals according to claim 10, wherein the parity information is selected from an even parity, an odd parity, and a frame check sequence using a cyclic code according to a use. Delivery method. 12. The method according to claim 2, wherein the access information includes information on the execution of data distribution.
12. The method of delivering the same data to a plurality of terminals according to 9, 10, or 11. 13. The access information according to claim 2, wherein said access information is minimum access information required at least for said terminal to be able to receive said data from said relay means. , 5, 6, 7, 8,
13. The method of delivering the same data to a plurality of terminals according to 9, 10, 11 or 12. 14. The method according to claim 13, wherein the minimum access information includes a relay address when the terminal receives the data. 15. The method according to claim 14, wherein the minimum access information includes information on an encryption method. 16. The method according to claim 15, wherein the information on the encryption method is an encryption key and an encryption method. 17. The minimum access information includes: a time at which the terminal can receive data from the relay unit;
14. The method of delivering the same data to a plurality of terminals according to claim 13, comprising information on time. 18. The parity information is returned to the distribution means as a report using the same line used when notifying the access information, the result of determining the normality of the data received by the terminal. The method of delivering the same data to a plurality of terminals according to claim 10 or 11, wherein: 19. The method of delivering the same data to a plurality of terminals according to claim 18, wherein the report is returned only when the terminal determines that the terminal is abnormal. 20. The method according to claim 18, wherein said report is stored and managed in said distribution means. 21. The report, wherein the distribution means judges the distribution status to each terminal, and if the distribution status is not normal, the report is again transmitted only to the terminal that has received abnormal data. 21. The method of distributing the same data to a plurality of terminals according to claim 18, 19, or 20, wherein the data is data to be redistributed. 22. The same data to a plurality of terminals according to claim 21, wherein the redistribution is performed via the same line used when the access information is directly notified from the distribution unit to the terminals. Delivery method. 23. Each terminal for receiving distribution data, a data broadcasting device for substantially distributing distribution data in response to an access from each terminal, and transmitting a base of the distribution data to the data broadcasting device, A data distribution center for directly transmitting access information enabling access to the data broadcasting device to each terminal that receives the distribution, and a data distribution center device. 24. The data distribution center, comprising: input address storage means for storing an address of the data broadcasting device; line interface means for connecting a line with the terminal; Broadcast information transmitting means for transmitting, broadcast information creating means for converting the distribution data into the broadcast information and outputting the broadcast data to the broadcast information transmitting means, and command transmitting means for notifying each terminal of the access information as a command. The data distribution system device according to claim 23, wherein: 25. The data broadcasting device, comprising: a broadcast information receiving means for connecting to a line with the data distribution center to receive the broadcast information; and a broadcast information multiplexing means for multiplexing the broadcast information from the broadcast information receiving means. A public communication line plural simultaneous connection interface means having a broadcast address capable of specifying the data broadcasting device itself and receiving a call from the plural terminals via a communication line to perform line connection. The data distribution system device according to claim 23 or 24, wherein: 26. Line interface means for receiving the command directly from the data distribution center, calling the data broadcast device, connecting to the line and receiving the broadcast information from the data broadcast device, 26. The data distribution system device according to claim 23, further comprising: a command receiving unit that receives the access information as the command through the line interface unit. 27. The data distribution system device according to claim 23, wherein said data distribution center includes distribution data storage means for storing said distribution data before distribution. 28. The terminal according to claim 23, wherein the terminal further comprises a broadcast address storing means for storing a broadcast address for specifying the data broadcasting device from the terminal and providing the broadcast address to the line interface means. 25, 26 or 2
8. The data distribution system device according to 7. 29. The data distribution center, when transmitting the distribution data to the data broadcasting device, encrypts the distribution data from the distribution data storage means and transfers the encrypted data to the broadcast information creating means. 24. A method according to claim 24, further comprising the step of:
9. The data distribution system device according to 8. 30. The data distribution center, wherein the distribution data encryption means stores an encryption key for converting the distribution data into encrypted distribution data, and provides the encryption key to the command transmission means. The data distribution system device according to claim 29, further comprising a storage unit. 31. The data distribution center further comprises a distribution data parity creating means for creating a parity for judging the normality of a delivery situation to the terminal and providing the parity to the broadcast information creating means. 24, 25, 26, 27, 2
31. The data distribution system device according to 8, 29 or 30. 32. The data distribution system device according to claim 31, wherein said terminal includes a broadcast information separating unit for separating said parity from said broadcast information received by said line interface unit. 33. The terminal, further comprising: reception result discriminating means for judging the normality of the distribution status based on the parity separated from the broadcast information by the broadcast information separating means and outputting a discrimination result. 33. The data distribution system device according to claim 32, wherein: 34. The terminal further comprises report transmission means for receiving the discrimination result from the reception result discrimination means and returning the reception result as a report to the data distribution center via the line interface means. The data distribution system device according to claim 33, wherein: 35. The report transmitting means, according to the reception result, creates a report only when the reception result is abnormal, and returns the report to the distribution center via the line interface means. A data distribution system device according to claim 33. 36. The terminal according to claim 32, wherein said terminal comprises distribution data decoding means for decoding encrypted distribution data separated from said broadcast information by said broadcast information separation means. 36. The data distribution system device according to 34 or 35. 37. The terminal according to claim 33, further comprising: distribution data storage means for storing said distribution data separated from said broadcast information by said broadcast information separation means. 2. A data distribution system device according to item 1. 38. The terminal, further comprising: distribution data storage means for storing the distribution data decrypted by the distribution data decryption means using an encryption key from the command receiving means. 37. The data distribution system device according to claim 36, wherein: 39. The data distribution center according to claim 34, wherein said report receiving means receives said report through said line interface means.
9. The data distribution system device according to 8. 40. The data distribution system apparatus according to claim 39, wherein said data distribution center further comprises a report storage unit for separately storing and managing the report received by said report reception unit. 41. The data according to claim 39, wherein said data distribution center further comprises means for judging distribution status to said terminal based on said report received by said report receiving means. Delivery system equipment. 42. The data distribution center further comprises a re-distribution unit for re-distributing the data to the terminal when the distribution to the terminal is determined to be abnormal distribution. 42. The data distribution system device according to claim 41. 43. The data broadcasting device according to claim 25, further comprising an information storage means for temporarily storing said broadcast information received by said broadcast information receiving means.
9, 30, 31, 32, 33, 34, 35, 36, 3,
The data distribution system device according to 7, 38, 39, 40, 41 or 42. 44. Each of the terminals and the data distribution center, and each of the terminals and the data broadcasting device are connected by a public communication line.
8, 29, 30, 31, 32, 33, 34, 35, 3,
6. The data distribution system device according to 6, 37, 38, 39, 40, 41, 42 or 43. 45. The data broadcasting apparatus and the data distribution center are connected by a public communication line.
7, 28, 29, 30, 31, 32, 33, 34, 3
5, 36, 37, 38, 39, 40, 41, 42, 43
Or the data distribution system device according to 44. 46. The data broadcasting apparatus and the data distribution center are connected by a dedicated line.
7, 28, 29, 30, 31, 32, 33, 34, 3
5, 36, 37, 38, 39, 40, 41, 42, 4
47. The data distribution system device according to 3, 44, 45 or 46. 47. The data distribution system device according to claim 44, wherein said public communication line is an analog telephone line. 48. The data distribution system device according to claim 44, wherein said public communication line is an ISDN line. 49. The data distribution center according to ITU-T Recommendation Q.50 when communicating with each terminal. 49. The data distribution system device according to claim 48, wherein the terminal is connected to the terminals via the public communication line performed using user information specified in 931. 50. The data broadcasting apparatus according to claim 23, wherein a teledome is used.
7, 28, 29, 30, 31, 32, 33, 34, 3
5, 36, 37, 38, 39, 40, 41, 42, 4
50. The data distribution system device according to 3, 44, 45, 46, 47, 48 or 49.