JP3457808B2 - Information transfer system and information provided device - Google Patents

Description

Detailed Description of the Invention

[0001]

The present invention relates to an information data is connected to the network storage providing device provides information to the information object providing apparatus connected to the network transfer system, as well as, Ru its components der information The present invention relates to a device for providing information.

[0002]

2. Description of the Related Art A user uses an information-provided device (hereinafter, referred to as a user terminal) to retrieve information stored in an information storage / provided device (hereinafter, referred to as a server) connected to a network. The system
There are many information transfer systems, such as the Internet.

[0003] In such an information transfer service on the Internet, first, the user side accesses a server having data required by the user, and the main data (Home Pag
e) request to be sent. In response to the access, the server side recognizes the transmission requester and transmits the main data to the transmission requester. When the user receives the main data from the server, the user selects the detailed data required by the menu, if necessary, and requests the server to send the detailed data. The server side transmits the requested detailed data to the transmission requester. By such a method, a data transfer service on the Internet has been established.

An information transfer system constructed on a dedicated or general-purpose network other than the Internet was also transferred by a server in response to a user's request, almost in the same manner as described above.

[0005]

As described above, in the conventional information transfer system, the information when the user wants the information and accesses it is transferred from the server to the user. Therefore, the user cannot know the fact that the information is updated thereafter.

[0006] For example, information progress of professional baseball games, odds information of horse racing, and the like are frequently updated by the information provider side according to the changes.

Therefore, in the conventional information transfer system, a user who needs such frequently updated information is
You need to access the server frequently. However, even if the access is repeated, the information may not be updated, and thus the access often ends in vain. It is difficult to say that it is an efficient information transfer system in view of network traffic, because frequent access often results in useless access. Particularly in the case of an information transfer system that targets many user terminals, frequent access is highly likely to induce congestion.

As a method for the user to obtain frequently updated information at the time of updating, as in the case of a teletext system, the server always sends the latest information to the communication network, and the user sends it to the terminal as needed. There is also a method of importing from. However, this method causes the user terminal to capture the information that the user does not need, and the density of the information that the user terminal really needs is small. Even though such information that the user desires is small, a large amount of information is transmitted, so it cannot be said that this method is also an efficient method.

Therefore, there is a demand for an information transfer system in which the user can efficiently obtain the information desired by the user out of various types of information that is frequently updated, and the load on the network is small.

Further, although the revision number and the update time are often included in the provided information, the information can be used only on the user terminal side as the information indicating the revision number and the update time.

Even if the update time is accurate, if the clock of the user terminal is incorrect, inconvenience may occur when the user terminal performs some processing based on the update time or the like.
For example, when the transfer information at an update time that is not possible later than the clock time is discarded, the transferred information may be discarded because the clock time is incorrect.

Further, the amount of information to be transferred may be quite large, and in such a case, it is divided into a large number and reaches the user terminal. Depending on the network, the order may get out of order to reach the user terminal. In the case of packet communication, the ordering of packets is confirmed by the sequence numbers of the packets, but in the case of information to be transferred, if the ordering of the information transmitted after being divided into multiple pieces is disturbed, it becomes of no value as information. In some cases, such an order compensation function may be insufficient.

Therefore, there is a demand for an information transfer system in which the user terminal can exchange time information between the server and the user terminal in a form that can be effectively used.

In order to solve such a problem, the first aspect of the present invention is to provide at least one or more information storage / providing devices and a plurality of information-provided devices that receive the information broadcast from the information storage / providing devices. In an information transfer system connected via a network, (A) each information storage / providing device includes (A-1) time information related to the time of transmission of newly input or updated input transfer target information in a transmission signal. The time information generation means to be changed to (A-2) Transfer target information is new.
Provided side communication means for transmitting a transmission signal in which at least the newly input or updated input transfer target information and time information are inserted toward each information-provided device side only when the standard input or update input is performed And (B) each information-provided device receives (B-1) a transmission signal from any of the information storage / providing devices that has arrived via the network, and (B- 2) The time information included in the received transmission signal is identified, and the time information identified this time,
Previously identified time information related to the transfer target information received this time
And the information to be transferred that was received this time is sent first.
Transfer target information received this time, if it is trusted
And a time information identifying means for discarding .

Here, (A) each information storage / providing device is (A-
3) The device further includes a type information generation unit that causes the transmission signal to include the type information indicating the type of the newly input or updated input transfer target information, and (B) each information-provided device (B-3).
Built-in type information of transfer target information that can be received by itself, collates the type information included in the received transmission signal with the built-in type information, and makes a new input or update input related to the type information. It is preferable to further include information type identification means for determining the necessity of the transferred information to be transferred.

[0016]

The second aspect of the present invention is characterized by the configuration of the information provided apparatus in the information transfer system of the first aspect of the present invention.

By transmitting and receiving the time information indicating the transmission time (not the update time) of the transfer target information according to the first and second aspects of the present invention, the information-provided apparatus determines the latestness of the transfer target information received this time, It is possible to confirm the order in the case of arrival in a divided manner, and by adjusting the internal clock to the time, it is possible to unify the time of the entire information transfer system and make it accurate.

Further, if the function of transmitting / receiving the type information is incorporated in the first and second aspects of the present invention, the information-provided device can confirm the existence of the transfer target information newly input or updated, and based on the type information. By confirming the necessity of the information to be transferred and incorporating it into the inside, it becomes possible to efficiently obtain the information desired by the information-provided device out of various types of frequently updated information in near real time. The load on the network can also be reduced.

[0020]

DETAILED DESCRIPTION OF THE INVENTION

(A) First Embodiment Hereinafter, a first embodiment of the information transfer system according to the present invention will be described in detail with reference to the drawings.

Since the information transfer system of the first embodiment provides a real-time information transfer service, an approach is taken from the communication method, and an updated information type is transmitted from the server to the network every time the information is updated, and the user side updates it. It is characterized in that it receives the information type, performs filtering according to the information type, and acquires only updated information required by the user side.

(A-1) Configuration of the First Embodiment FIG. 2 shows the network configuration of the information transfer system of the first embodiment.

In FIG. 2, the information transfer system according to the first embodiment includes a plurality of user terminals (information-provided devices) 1-1 to 1-m that receive information and at least one or more that provides information. Server (information storage and provision device) 2-1
To 2-n are connected via the network 3.

Here, the network 3 may be either a dedicated network or a public network, and may have any connection form of bus, ring or mesh. Depending on the connection form, it may be configured to include a concentrator and a relay station as appropriate. In addition, in the case of this 1st and 2nd embodiment mentioned later, the network 3 needs to correspond to a broadcast communication function.

Each server 2-j which is an information storage / providing device
(J is 1-n) is composed of, for example, a large-capacity hard disk device, a supercomputer or a workstation having a communication device such as a modem or an Ethernet interface, and the like. The functional block diagram shown in FIG.
It has the configuration shown in.

That is, each server 2-j includes an information input / output unit 20, an information search management unit 21, an information storage unit 22, an encryption unit 23, an encryption key generation unit 24, a time information generation unit 25,
It is composed of an information type generation unit 26 and a server transmission / reception unit 27.

The information input / output unit 20 inputs new transfer target information, inputs updated transfer target information,
It is used to input the update content of contractor information that can be provided with the transfer target information by the information transfer system. In addition, the information input / output unit 20 outputs the output target information provided from the information search management unit 21 when confirmation of the stored information is requested by the information provider or output of the charging information is requested. It is what is output.

Here, the transfer target information is input with the genre type indicating the genre (major classification) of the information and the information type indicating the small classification or the small classification of the information specified. For example, the genre type is specified as "sports", the minor classification is "baseball", and the detailed classification is "team name". The contractor information includes information that specifies the contractor and the contractor such as a terminal ID, and information that specifies the genre type and information type that can receive the information transfer. The contractor information may further include contract period information and service execution time information.

The information storage unit 22 includes a transfer target information storage unit 22a and a contractor information storage unit 22b. The transfer target information storage unit 22a stores the transfer target information in a form that can be accessed by using the genre type or the information type as a key. The contractor information storage unit 22b stores the contractor information in a form that can be accessed using the genre type or the information type as a key. Further, the contractor information storage unit 22b also stores charging information for each contractor.

When the information input / output unit 20 provides contractor information for instructing new subscription, cancellation, or modification of contract content, the information search management unit 21 responds accordingly to the contractor of the information storage unit 22. The contents of the information storage unit 22b are updated.

In addition, the information search management unit 21 stores the new transfer target information and the updated transfer target information in the information input / output unit 20.
When the information is given from the information storage unit 2,
The contents of the transfer target information storage unit 22a of No. 2 are updated, and the transmission process of the given transfer target information is started. When the transmission process is started, the information storage unit 2
The charging information of the contractor relating to the transfer target information in the contractor information storage unit 22b of No. 2 is also updated.

In the first embodiment, the server 2
-J and the communication between the user terminals 1-i (i is 1 to m),
The information retrieval management unit 21 is assumed to be a communication (for example, ATM communication) for transferring a packet as shown in FIG.
Divides the transfer target information to be transmitted into information amount to be included in one packet (hereinafter, referred to as an information amount of a transfer unit; the transfer information main body in FIG. 3B), and transfers it to the encryption unit 23 for transmission. To start.

Here, the information to be transmitted to the user terminal 1-i may be all the transfer target information input from the information input / output unit 20, or may be only the updated part information. In the case of the transfer target information input for the first time from the information input / output unit 20, all the information is transmitted. Further, when the updated transfer target information is input from the information input / output unit 20, for example, the information amount is compared with the first threshold value,
When it is less than the threshold value, all the input information is transmitted, and when it is the first threshold value or more, the input information and the information portion before the update accumulated in the information accumulating unit 22 are different ( (Difference information), the amount of the information part is compared with a second threshold value, all the input information is transmitted when it is larger than the second threshold value, and when it is less than the second threshold value, the information part (difference information) (Including information and information indicating that it is difference information) is transmitted.

Further, the information retrieval management unit 21 stores the contractor information in the information storage unit 22 when the decryption key reception response is given from the user terminal 1-i via the server transmission / reception unit 27. 22b, the information of the contractor is continuously valid, and when the reception response of the decryption key is not given, the information of the contractor is invalid (since there is a relation with billing, It does not erase itself).

The encryption unit 23 uses the encryption key determined by the transfer target information created by the encryption key generation unit 24, which will be described later, with respect to the transfer unit information provided from the information search management unit 21, Time information generation unit 2 that performs encryption
5 is to be transferred. As will be described later, the encryption key is transferred as a decryption key to the user terminal 1-i of the contractor of the information transfer service, and the above-described encryption processing is performed by the contractor only. It is for receiving the contents of. The specific method of encryption may be any method, and the specific method itself does not have the characteristics of the first embodiment.

The encryption key generation unit 24 determines a fixed time such as the contract shortest period (for example, one month, one week or one day).
Each time, an encryption key is regenerated using a random number or the like and stored inside, and is transmitted as a decryption key to each user terminal 1-i via the server transmission / reception unit 27. Therefore, the encryption key and the decryption key are the same data, and the reception information can be decrypted by being received by the user terminal (contractor) 1-i, and the contract between the sender and the receiver can be renewed. Reestablish.

Here, a different encryption key is created for each contract minimum unit determined by the genre type and the information type. Further, the transmission of the encryption key is performed by extracting the contractor information of the contract minimum unit related to the encryption key from the contractor information accumulating unit 22b of the information accumulating unit 22 to obtain the contractor (user terminal 1-i). ) Is transmitted in time sequence. The transmission of the decryption key naturally includes the key itself and the genre type and information type information (which may be an identification number).

Unlike the transmission of the encryption key (decryption key), the transmission of the transfer target information itself is a broadcast transmission as described later. However, if the network 3 is a closed system for the information transfer service, the encryption key (decryption key) may be transmitted by broadcast communication.

Further, the encryption key generation unit 24, in response to the request from the encryption unit 23, sends the corresponding encryption key to the encryption unit 2
3 is given.

The time information generator 25 has a built-in clock 25a such as a standard radio clock, and when the information of the encrypted transfer unit is given, the real time is extracted from the clock 25a and extracted. The real time is processed into a format that can be inserted into a packet, added to the encrypted transfer unit information, and provided to the information type generation unit 26.

FIG. 3C shows an example of the format of the time information inserted in the packet, in which an example of the number of bits is shown by parenthesized numbers. As shown in FIG. 3 (c),
The time information includes "day" (5 bits), "hour" (5 bits), "minute" (6 bits), "second" (6 bits), "millisecond" (10 bits), "microsecond" ( 10 bits) and at least an “error correction code (CRC)” (α bits). As other information (β bit),
A "month" and a "bit indicating whether or not time information changes" may be included.

Here, the "bit indicating whether or not the time information has changed" indicates whether different time information is inserted for each packet relating to the same transfer target information or the same time information is inserted. . For example, the switching may be performed depending on the type of information to be transferred and the amount of information to be transferred. In addition, in the case of the first embodiment, it is basically to insert different time information for each packet.

The transmission of time information has the following functions.
The contractor can distinguish the latest information from the old information. That is, the user terminal 1-i receives the update information and the like almost at the same time when the update information and the like is input to the server 2-j. In addition, the old and new information can be recognized regardless of the version number, and the update time can be recognized. Further, the user terminal 1-i can make the clock in the terminal almost accurate by adjusting the clock in the terminal to the extracted time information, although there is an error in the propagation time. Furthermore, when transmitting different time information for each packet,
In the user terminal 1-i, in addition to the determination of the order based on the sequence number of the packet, the order determination based on the time information can be executed, and the order of the packets can be double checked.

The time period of the clock 25a of the time information generating unit 25 is given to the encryption key generating unit 24, and the encryption key generating unit 24 determines the generation timing of the encryption key based on this time period. capture.

The information type generation unit 26 is the time information generation unit 2
5 is added with type information indicating the type of transfer target information as shown in FIG. 3D to complete the information to be inserted in the information part of the packet, and the server transmission / reception unit 2
Give to 7.

Here, the type information is, as shown in FIG. 3D, a "server type" (any of 8 to 12 bits) including an ID number for identifying the server 2-j, and the above-mentioned "type". It consists of "genre type" (any of 4 to 8 bits), "information type" (any of 4 to 12 bits) and "error correction code (CRC)" (γ bits) described above. The genre type and the information type are retrieved by the information search management unit 21 from the transfer target information storage unit 22a of the information storage unit 22 and given to the information type generation unit 26. It should be noted that the server type may also include information for identifying the transfer service providing company.

Such type information is used for the user terminal 1-i.
On the side, it is used for judgment (filtering) as to whether or not the transfer information body is received.

When the transmission / reception information (contractor; user terminal) and the decryption key (encryption key) are given from the encryption key generation unit 24, the server transmission / reception unit 27 inserts the decryption key into the information unit. Then, the decryption key notification packet in which the transmission partner information is inserted in the destination field of the header part is completed and is transmitted to the network 3.

When the decryption key reception response packet is given from the user terminal 1-i via the network 3, the server transmission / reception unit 27 notifies the information retrieval management unit 21 to that effect. .

Further, when the transmission / reception information is given from the information type generation section 26, the server transmission / reception section 27 inserts the transmission information into the information section of the packet and also inserts the information for instructing the broadcast communication. Is added to complete the information transfer packet and is transmitted to the network 3.

Here, in the header portion of all types of packets transmitted from the server 2-j, contract type information indicating that the packet is a contractor target packet (hereinafter referred to as contract information type packet). Labels are also inserted. This contract-type information label is used by the user terminal 1-i to identify whether it is a contract information-type packet or another packet. Further, the header of the packet transmitted from the server 2-j is also inserted with an information section identification label indicating the transfer target information or the encryption key in the information section. This information section identification label is used by the user terminal 1-i to identify whether it is an information transfer packet or an encryption key notification packet. In fact, even in the packet format of the existing network, there are undetermined bits whose usage is not specified,
For example, use these undetermined bits as labels.

On the other hand, each user terminal 1-i is composed of, for example, a hard disk device, a workstation having a communication device such as a modem and an Ethernet interface unit, a personal computer, etc., and the information transfer of the first embodiment. The functional block diagram has the configuration shown in FIG. 4 in relation to the characteristics of the system.

That is, each user terminal 1-i has a terminal transmitting / receiving unit 10, an information type identifying unit 11, and a time information identifying unit 1.
2, a decryption unit 13, a decryption key storage unit 14, an information processing unit 15, an information storage unit 16 and an information input / output unit 17.
The terminal transmitting / receiving unit 10, the information type identifying unit 11, the time information identifying unit 12, the decrypting unit 13, and the decrypting key storing unit 14
It is preferable from the standpoint of preventing unauthorized acquisition of information that the device be realized as an external device of the information processing main body such as a workstation or a personal computer, that is, as a dedicated peripheral device (adapter device) for the information transfer service.

The terminal transmitting / receiving unit 10 executes transmission / reception of packets to / from the server 2-j via the network 3. Also, for received packets, decoding of the packet header portion is performed, and for transmitted packets, packet transmission is performed. The header is generated.

The terminal transmitting / receiving unit 10 determines the contract type information label of the received packet, and if the label indicates other than the contract type packet of the information transfer service, the processing configuration of the packet (not shown) is adopted. Deliver the packet, or discard it if it does not have the processing configuration. If the label indicates a contract information type packet, it is further determined by the information section identification label whether the packet is an information transfer packet or a decryption key notification packet. When the packet is a decryption key notification packet, the contents of the information portion (decryption key, and genre type and information type) are provided to the decryption key storage unit 14.
Note that the decryption key notification packet is
Since the identification number of the user terminal 1-i is inserted in the destination field, packet division can be performed in this respect as well. In the case of an information transfer packet, the packet sequence number in the header part is confirmed, the order is adjusted, and the packet is given to the information type identification part 11.

Also, when the terminal transmitting / receiving unit 10 is requested by the decryption key storage unit 14 to transmit the decryption key reception response to the server 2-j, the decryption key reception response packet is The data is transmitted to the server 2-j that is the transmission source of the decryption key via the network 3.

The decryption key storage unit 14 is the terminal transmission / reception unit 1
When the decryption key and the genre type and the information type are given from 0, the received decryption key is stored in the format associated with the genre type and the information type, and after the storing operation is completed. , And instructs the terminal transceiver 10 to transmit the decryption key reception response to the server 2-j.

As described above, on the server 2-j side, since the decryption key is transmitted only to the user terminal 1-i involved in the contract, the decryption key storage unit 14
Although it is not necessary to confirm whether the received decryption key is received by the user terminal 1-i, the decryption key storage unit 14 is stored in the information storage unit 16 described later in view of safety. It may be stored internally after the contracted genre type and information type are compared with the received genre type and information type of the decryption key.

Further, the decryption key storage unit 14 returns the decryption key when a predetermined decryption key is obtained from the decryption unit 13 described later.

The information type identifying section 11 is provided for the user terminal 1
-I has a built-in type information storage unit 11a that stores type information such as server type, genre type, and information type that can be transferred (contracted). Information type identification unit 11
When the content of the packet information section is given from the terminal transmitting / receiving section 10, the content of the type information field as shown in FIG. 3D, that is, the server type, the genre type, and the information type are respectively identified (in CRC). Error detection and correction processing based on this), built-in type information storage unit 1
It is determined whether or not the type of contract target that the terminal 1-i accumulated in 1a can receive is. That is,
It is determined whether the type information matches the contract of the user. If the identified type information conforms to the contract, the content of the packet information section (the type information may be excluded) is transferred to the time information identifying section 12. On the other hand, the information type identification unit 11 discards the packet at this stage if the identified type information does not conform to its contract. As described above, the packet filtering based on the type information is executed.

Here, it is possible that the contractor operates the type information filtering function so that the transfer target information passes through the information type identification unit 11 in violation of the contract. Through the protection.

The time information identifying section 12 is the information type identifying section 1
When the processed information is given from 1, the contents of the time information field as shown in FIG.
(Including error detection and correction processing based on the above) and the time of the transfer information of the same type received immediately before being accumulated in the information accumulating unit 16 via the information processing unit 15 described later. Make sure the time is late.

As described above, the server 2-j transmits information when the information to be transferred is updated or newly input. Therefore, the time of the information (information transfer packet) transferred this time is received. In principle, it is unlikely that the time will be earlier than the time of the immediately preceding information, but if there is such a time reversal due to an abnormality in the network 3 or the like, the time information identifying unit 12 determines Discard.

When confirming the validity of the time information, the time information identifying section 12 gives the time information to the information processing section 15 to correct the time of a clock (not shown) inside the user terminal 1-i. Further, in the case of a series of information transfer packets in which different time information is inserted for each packet, the continuity of the series of packets arriving at the user terminal 1-i before and after is confirmed and reversed. If so, correct the order. When the above processing is completed, the time information identification unit 12 gives the contents of the packet information unit (at least the transfer information body) to the decoding unit 13.

The decryption section (decryption section) 13 receives the contents of the packet information section from the time information identification section 12,
The decryption key relating to the type of transfer information this time is extracted from the decryption key storage unit 14, and the decryption key is used to generate the decryption key shown in FIG.
The encrypted transfer information body as shown in (b) is decrypted and the decrypted transfer information is given to the information processing unit 15.

The information storage unit 16 stores the transferred information together with the time information, which has a storage area for each of the server type, genre type and information type.

The information processing unit 15 receives the type information of the server type, genre type and information type which the user terminal 1-i can receive (contracts with), which is input from the information input / output unit 17 described later. It is given to the type information storage unit 11a to be stored.

As described above, the information processing section 15 also gives the time information identifying section 12 the time information at the time of transfer immediately before being taken out from the information storage section 16.

Further, the information processing section 15 includes the decoding section 13
When the transfer information decoded from is given, it is stored in the information accumulating unit 16 together with the time information given by the time information identifying unit 12, and updated to the information input / output unit 17 at the end of the accumulation of a series of transfer information. The notification processing is performed to notify that there is the transferred transfer information or the newly received transfer information.
The time information stored in the information storage unit 16 is as follows:
Only the time information inserted in the first information transfer packet of the series of information transfer packets may be used, or the time information inserted in the first and last information transfer packets of the series of information transfer packets may be used. .

Furthermore, when the information input / output unit 17 specifies the server type, the genre type, and the information type to request the extraction of the transfer information, the information processing unit 15 transfers the corresponding transfer from the information storage unit 16. Information (including time information)
The information is taken out and given to the information input / output unit 17.

As described above, the information input / output unit 17 as the user interface inputs the type information of the server type, the genre type and the information type which the user terminal 1-i can receive (contract with) the transfer. Alternatively, the presence of the updated transfer information or the newly received transfer information is notified, or the information processing unit 15 is requested to retrieve the transfer information specifying the server type, the genre type, and the information type, and is returned. The transfer information is displayed.

(A-2) Operation of the First Embodiment Next, the user terminal 1-i having the above detailed configuration.
The operation of the first information transfer system including the server 2-j will be described.

First, the process of generating an encryption key and delivering it to a predetermined user terminal (contractor) 1-i will be described focusing on the process in the encryption key generation unit 24. Here, FIG.
6 is a flowchart showing the processing of the encryption key generation unit 24.

The encryption key generation unit 24 waits for the key generation time (step 100). At the key generation time, first, the type parameter N for specifying the type of the contract minimum unit is initialized ( Step 101). After that, the Nth type key is regenerated and stored using a random number or the like (step 102). Then, the server transceiver 27 is requested to take out the Nth type 1 contractor (user terminal) from the storage unit 22b (step 103) and transmit the decryption key (including the type information) to the contractor. (Step 104).

As a result, the decryption key is transmitted to the corresponding user terminal 1-i, and the decryption key storage unit 14
The received response is sent back to the server 2-j, and the contract is completed.

After requesting the transmission of the decryption key, the encryption key generator 24 confirms whether the transmission request has been issued to all N-type contractors (step 105). Returning to the contractor extraction step 103, when the transmission requests to all the contractors are issued, it is determined whether or not the encryption key generation processing for all types has been completed (step 106).

If the processing for all types has not been completed, the type parameter is updated to indicate the next type and the process returns to the above-mentioned encryption key generation step 102 (step 107), and the processing for all types is completed. If so, the series of processes is terminated.

Next, the features of the first embodiment will be described.
The operation when the transfer target information is input for the first time or when the updated transfer target information is input is described with reference to the block diagrams of FIG. 1 and FIG.
The process on the side and the process on the user terminal 1-i side will be described in detail in this order.
Here, FIGS. 1 and 4 are block diagrams also showing the flow of processing, and therefore, the illustration of an independent flowchart is omitted.

When the information input / output unit 20 newly inputs the transfer target information or the updated transfer target information, the information retrieval management unit 21 accordingly transfers the transfer target of the information storage unit 22. Information storage unit 22a
Is updated, and the transmission process of the given transfer target information is started, and at this time, the billing information of the contractor related to the transfer target information is also updated.

Here, based on the information amount of the input transfer target information itself or the information amount before being updated, the information retrieval management unit 21 transmits all the input transfer target information, It is determined whether only the information part (difference information) different from the information before update is transmitted, and the determined information to be transmitted is divided into the amount for each transfer unit inserted in the information transfer packet, and the encryption unit Given to 23.

In the encryption unit 23, an encryption key determined by the type of transfer target information created in the encryption key generation unit 24 is used to encrypt such transfer unit information. It is transferred to the time information generator 25.

To the encrypted transfer unit information, the time information generating section 25 adds the time information at that point or the time information about the first packet and gives it to the information type generating section 26. After that, the information type generation unit 26 adds the type information indicating the type of the transfer target information and the like, completes the information to be inserted into the information section of the information transfer packet, and provides it to the server transmission / reception unit 27.

Then, the server transmission / reception unit 27 inserts the transmission information from the information type generation unit 26 into the information section of the information transfer packet, the information for instructing the broadcast communication, the contract-type information label, and the contents of the information section. Is added to the header section including an information section identification label indicating that the information is to be transferred, and the information transfer packet is completed and transmitted to the network 3.

The information transfer packet thus transmitted is sent to each user terminal 1-by the broadcast function of the network 3.
Delivered to i.

Next, the operation (characteristic operation of the first embodiment) at the user terminal 1-i when receiving such an information transfer packet will be described.

When the packet arrives at the terminal transmission / reception unit 10, the contract type information label is determined, and if the label indicates other than the contract information type packet related to the information transfer service, the packet processing configuration (not shown) is set. The packet is delivered, and if there is no processing configuration, it is discarded. If the label indicates a contract information type packet, it is further determined by the information section identification label whether the packet is an information transfer packet or a decryption key notification packet. When the packet is an information transfer packet, the contents of the information section of the packet are It is given to the information type identification unit 11.

In the information type identifying section 11, the server type, genre type and information type are identified from the packet information section given from the terminal transmitting / receiving section 10 and the terminal stored in the built-in type information storing section 11a. 1-i is compared and collated with the type of contract object that can be received, and if the identified type information conforms to the contract, the contents of the packet information section are transferred to the time information identification section 12, while the identified type information is If the contract is not met, the information transfer packet is discarded at this stage.

In the time information discriminating unit 12, the time information is discriminated from the information given from the information type discriminating unit 11, and the time of the transfer information of the same type received immediately before being accumulated in the information accumulating unit 16 is obtained. It is confirmed that this time is late by comparing with. Here, if there is a time reversal, the current received packet is discarded. On the other hand, when the validity of the time information is confirmed, the time of a clock (not shown) inside the user terminal 1-i is corrected, and a series of transfer packets in which different time information is inserted for each packet. In the case of a group, the user terminal 1-
The continuity of the series of packets arriving at i is confirmed, and if they are reversed, the order is corrected.

After the processing using the time information as described above, the content of the packet information section (transfer information body) given from the time information identifying section 12 is decoded by the decoding section 13 according to the current transfer information type. Decryption is performed using the decryption key, and the transfer information after the decryption processing is provided to the information processing unit 15.

The information processing section 15 stores the transfer information given from the decoding section 13 in the information storing section 16 together with the time information given from the time information identifying section 12, and when the accumulation of a series of transfer information ends, The information input / output unit 17 informs that there is updated transfer information or newly received transfer information.

When the information input / output unit 17 specifies the server type, the genre type, and the information type and requests the extraction of the transfer information, the information processing unit 15
The corresponding transfer information (including time information) is taken out from the information storage unit 16 and given to the information input / output unit 17 to be provided to the user.

(A-3) Effects of First Embodiment According to the information transfer system of the first embodiment, the following effects can be obtained.

(1) When new transfer target information is input or updated transfer target information is input, the information is immediately delivered from the server 2-j to the user terminal 1-i. Therefore, the latest information is always delivered to the user terminal 1-i, and it is possible to prevent the user from accessing the server many times without being able to determine whether the information is the latest information. Can be forwarded.

(2) Only when the transfer target information is newly input or when the updated transfer target information is input,
Since the information is transmitted from the server 2-j, compared to the method in which the server side repeatedly performs the transmission operation to deliver the latest information to the user terminal and the user terminal performs the reception process as necessary, the network 3 Can be less burdensome.

(3) Since the information transfer packet including the contract type information label is transmitted / received, the user terminal can determine whether or not the information transfer packet can be received early and reduce unnecessary reception processing.

(4) The type information is included in the information transfer packet for communication, and the user terminal 1-i on the receiving side filters the transferred information based on the type information. By setting the type of unnecessary information of, unnecessary information can be automatically discarded. That is, you can receive only the latest information you need.

(5) Since the time information is exchanged between the server and the user terminal, the user terminal can always ensure accurate time. Therefore, it is possible to accurately capture the time interval between the timing at which the user views the transferred information and the timing at which it is transmitted.

(6) Since time information is exchanged between the server and the user terminal, even if old and new information reverses and arrives at the user terminal side due to an abnormality in the network, the abnormality can be detected. , Old information that arrives later can be discarded. In addition, the order of packets in a series of information transfer can be confirmed using this time information.

(7) Since information is transferred by broadcast communication only when the information is newly input or updated, the high speed required of the server is higher than that of a system accessed individually from many user terminals. It is lower than existing information transfer systems.

(8) Since the encryption process is used, it is possible to easily establish a contract with the contractor, and at the same time, prevent illegal use.

(B) Second Embodiment Hereinafter, a second embodiment of the information transfer system according to the present invention will be described in detail with reference to the drawings.

Since the information transfer system of the second embodiment also provides a real-time information transfer service, an approach is taken from the communication method, and each time information is updated, the server transmits the update information type to the network, and the user side updates it. The information type is received, filtering is performed according to the information type, and only updated information required by the user is acquired.

(B-1) Configuration of the Second Embodiment This information transfer system also provides information, as shown in FIG. 2, with a plurality of user terminals 1-1 to 1-m to which information is provided. At least one or more servers (information storage / providing devices) 2-1 to 2-n are connected via a network 3.

FIG. 6 is a block diagram showing a functional configuration of the server 2-j in the second embodiment, and the same or corresponding portions as those in FIG. 1 are designated by the same reference numerals.

Each server 2-j of this second embodiment also
Information input / output unit 20, information search management unit 21, information storage unit 2
2, encryption unit 23, encryption key generation unit 24, time information generation unit 25, information type generation unit 26 and server transmission / reception unit 27
It consists of

However, the functions of some of the functional parts are different from those of the first embodiment. Below, each part is explained focusing on the differences from the first embodiment.

The information input / output unit 20, the information storage unit 22, the encryption unit 23, and the time information generation unit 25 are almost the same as those in the first embodiment, and therefore their explanations are omitted.

When the information input / output unit 20 gives contractor information for instructing new subscription, cancellation, or change of contract contents, the information search management unit 21 responds to the contractor of the information storage unit 22 accordingly. The contents of the information storage unit 22b are updated. In addition, the information search management unit 21 determines whether the new transfer target information or the updated transfer target information is the information input / output unit 2.
When given from 0, the content of the transfer target information storage unit 22a of the information storage unit 22 is updated accordingly.

The above-mentioned functions are the same as those in the first embodiment, but the transmission processing function until the transfer target information is finally sent to the user terminal is the same as that in the first embodiment. Is different.

The information retrieval management unit 21 gives the type information whose information is newly input or updated to the information type generation unit 26,
Information type generation and transmission processing for only the information type are activated.

As described later, the contents of the information portion of the packet broadcasted to each user terminal 1-i by this transmission activation are as shown in FIG. 7A, for example.
That is, in addition to the server type, genre type, and information type described in the first embodiment, the detailed type and type identification number (hereinafter referred to as type ID) are included. The detailed type is, for example, a type that is finer than the information type and finer than the minimum contract unit. That is, on the side of the user terminal 1-i, the necessity of newly input or updated information can be determined even by a finer classification than the minimum contract unit. In the case of the second embodiment, various packets are exchanged between the server 2-j and the user terminal 1-i as described later, but this type ID is inserted in the packet and the number of bits is small. You can specify the type in.

The information retrieval management unit 21 includes the server transmission / reception unit 2
When a request for transmission of newly input or updated information is given from any of the user terminals 1-i via 7,
After confirming whether or not the user terminal 1-i can receive the information of the information type by the information of the contractor information storage unit 22b, the user of the user uses the encryption key related to the information type as the decryption key. The encryption key generation unit 24 is instructed to transmit to the terminal 1-i.

Here, as shown in FIG. 7B, the information part of the transmission request packet provided from the user terminal 1-i includes a message instructing the information request and the type ID. The specific information of the user terminal 1-i is obtained from the transmission source information in the header part. As shown in FIG. 7C, the decryption key notification packet contains a type ID in addition to the decryption key.

The information retrieval management unit 21 is the server transmission / reception unit 2
When a decryption key reception response is given from any of the user terminals 1-i via 7, the charging information in the contractor information storage unit 22b is updated, and the new input or update is made this time. The transfer target information (which may be the difference information from the immediately preceding information) is divided into the amount to be included in one packet and is given to the encryption unit 23.

As described above, the information type generation unit 26 generates the type information as shown in FIG. 7A when the information search management unit 21 requests the transmission of the type information, and the server transmission / reception unit To give to 27.

The encryption key generation unit 24 regenerates each type of encryption key in a predetermined cycle, as in the first embodiment. However, the transmission of the encryption key (decryption key) is not executed at the time of generation, and as described above, the transmission processing is individually performed to the transmission partner (user terminal) instructed when instructed by the information search management unit 21. The difference is that it is different from the first embodiment.

As described above, the server transmission / reception unit 27 performs the transmission processing of the type information packet, the decryption key notification packet and the information transfer packet, and the reception processing of the information request packet and the decryption key reception response packet. Is. Note that only the type information packet is broadcast. Further, the difference of each packet may be distinguished not only by the contents of the packet information part but also by the information part identification label (see FIG. 3A) in the header part. Further, the contract type information label is added to the transmission packet from the server 2-j as in the first embodiment.

As shown in FIG. 7E, the structure of the information section of the information transfer packet in the second embodiment is composed of a type ID, time information and a transfer information body. Since the type information of the updated or newly input information is transmitted in advance in the type information packet, only the type ID needs to be inserted here, and the amount of information per packet of the transfer information body is correspondingly increased. Have many.

FIG. 8 is a block diagram showing the functional arrangement of the user terminal 1-i according to the second embodiment.
The same or corresponding portions as and are designated by the same reference numerals.

Each user terminal 1-i of the second embodiment also
As shown in FIG. 8, the terminal transmission / reception unit 10, the information type identification unit 11, the time information identification unit 12, the decryption unit 13, the decryption key storage unit 14, the information processing unit 15, the information storage unit 16, and the information input / output unit. Have 17.

Here, the time information identification unit 12 and the decoding unit 1
3, the functions of the decryption key storage unit 14, the information processing unit 15, the information storage unit 16, and the information input / output unit 17 are the same as those in the first embodiment, and therefore the description thereof will be omitted.

The terminal transmitting / receiving unit 10 uses the type information packet,
The decryption key notification packet and the information transfer packet are received, and the information request packet and the decryption key reception response packet are transmitted.

When the terminal transmitting / receiving unit 10 confirms that the packet can be received with the contract type information label and the received packet is the type information packet, the type information (FIG. 7A) of the packet information unit is used as the information type. When the information type identification unit 11 makes a transfer request for information, the information request packet whose content is shown in FIG. To the server 2-j.

Further, if the terminal transmitting / receiving unit 10 confirms that the packet can be received by the contract type information label and the received packet is the decryption key notification packet, the decryption key information of the packet information unit (see FIG. c)) is given to the decryption key storage unit 14, and the decryption key storage unit 1
4 sends a decryption key reception response packet whose information section is shown in FIG. 7D to the server 2-j which is the source of the decryption key notification packet when the storage end is notified from Is.

Further, if the terminal transmitting / receiving unit 10 confirms that the packet can be received with the contract type information label and the received packet is an information transfer packet, the contents of the packet information unit (FIG. 7 (e)) are set as time information. The information is provided to the information identifying unit 12.

The terminal transmitting / receiving unit 10 internally buffers the type ID when transmitting the information request packet, and relates to the type requested by itself when receiving the decryption key notification packet or the information transfer packet. Confirm that it is. This is because packets may be exchanged with a plurality of servers almost at the same time.

The information type identifying section 11 stores the type information which the user has input using the information input / output section 17 and which can be received by the user terminal 1-i. Here, such receivable type information may also specify the detailed type described above, which is a class smaller than the contract minimum unit, that is, the contracted class may be specified in more detail. Is also good.

The information type identifying section 11 is the terminal transmitting / receiving section 10.
When the type information is given from, the contents are collated with the contents of the storage unit 11a, and when the coincidence is confirmed, the terminal transmission / reception unit 10 is instructed to transmit the information transfer request packet.

(B-2) Operation of the Second Embodiment Next, as described above, the information transfer of the second embodiment in which the function of the partial configuration is different from that of the first embodiment The operation of the system will be described with reference to the sequence diagram shown in FIG. In the case of the second embodiment, the operation of transmitting the decryption key is not an independent operation, so the operation when the transfer target information is input for the first time or when the updated transfer target information is input will be described. To do.

When the information input / output unit 20 newly inputs the transfer target information or the updated transfer target information, the information retrieval management unit 21 accordingly transfers the transfer target of the information storage unit 22. Information storage unit 22a
Is updated, the type information relating to the given transfer target information is given to the information type generation unit 26, and the type information transmission process is activated.

At this time, the information type generation unit 26
The type information as shown in FIG. 7A is generated and given to the server transmitting / receiving unit 27, the header part is added to complete the type information packet, and the type information packet is transmitted via the network 3 to all the types. It is broadcast to the user terminal (procedure T1 in FIG. 9).

Among the user terminals to which the type information packet arrives, the user terminal unrelated to the contract (shown by reference numeral 1-b in FIG. 9) recognizes the contract type information label in the header section and recognizes the type information. The packet is discarded and no further processing is executed (procedure T2 in FIG. 9).

On the other hand, the terminal transmitting / receiving unit 10 of the user terminal of the contractor recognizes that the current packet is a type information packet and inserts it into the packet information unit of FIG. 7A. The type information shown in FIG.
Give to one. As a result, the information type identification unit 11 identifies the type information and determines whether the type is the transfer target type that the user has requested.

A user terminal that has determined that it has received a type information packet relating to a type other than the type it is seeking (see FIG. 9).
In FIG. 9, the received type information packet is discarded and no further processing is executed (FIG. 9).
Procedure T3).

On the other hand, the information type identification unit 11 of the user terminal (indicated by reference numeral 1-a in FIG. 9) that has determined that it has received the type information packet relating to the type requested by itself transmits the transfer request packet. Is instructed to the terminal transmission / reception unit 10, and the terminal transmission / reception unit 10 transmits the information request packet having the contents of the information section shown in FIG. 7B to the user 2-j who transmitted the type information packet (procedure in FIG. T4).

Upon receiving such an information request packet, the server transmission / reception unit 27 of the server 2-j notifies the information retrieval management unit 21 of the fact, and the information retrieval management unit 21 sends the transmission source user terminal 1-. After confirming that a is a contractor, the encryption key generation unit 24 is instructed to transmit the decryption key.

As a result, the server transmission / reception unit 27 can transmit the decryption key of the information type to the transmission partner (user terminal 1-a) instructed by the information retrieval management unit 21 by the encryption key generation unit 24. Was asked by Figure 7 (c)
The decryption key notification packet in which the contents shown in FIG.
-A is transmitted (procedure T5 in FIG. 9).

The terminal transmitting / receiving unit 10 of the user terminal 1-a
After confirming acceptance of reception by the contract type information label of the received packet, the packet is recognized as a decryption key notification packet, and the content of the information part is given to the decryption key storage unit 14. As a result, the decryption key storage unit 14 stores the decryption key in a format associated with the type, and after the storing operation, transmits a decryption key reception response to the terminal transmission / reception unit 10 to the server 2-j. 7 is transmitted to the server 2-j, which is the sender of the decryption key notification packet, by the terminal transmitting / receiving unit 10 and the decryption key reception response packet in which the content shown in FIG. It is returned (step T6 in FIG. 9). With such a return, the contract is re-established.

The information search / management section 21 includes a server transmitting / receiving section 2
When it is notified from the user terminal 1-a that the decryption key has been received, the information retrieval management unit 21 causes the user terminal (contractor) 1 of the contractor information storage unit 22b to receive the decryption key. The charging information of -a is updated, and the newly input or updated transfer target information (which may be difference information from the immediately preceding time) is divided into the amount to be included in one packet and is given to the encryption unit 23.

After that, although there is no type information generation process, the process shown in FIG. 7 is performed by almost the same process as in the first embodiment.
The information transfer packet having the contents shown in (e) inserted in the information section is transmitted to the user terminal 1-a (step T7 in FIG. 9).

The reception process of the information transfer packet in the user terminal 1-a is also executed in substantially the same manner as in the first embodiment except that the operation of identifying the information type is not performed, and is transferred to the information storage unit 16. Information (transfer information body) is stored. The process of presenting the stored transfer information to the user is the same as in the first embodiment.

(B-3) Effects of the Second Embodiment Also in the second embodiment, it is possible to obtain substantially the same effects as in the above-described first embodiment. In addition to this, according to the second embodiment, the following effects can be obtained.

(1) Since only the type information is transmitted alone,
Detailed information can be included in the type information to be transmitted, and filtering based on more detailed type information can be executed.

(2) Since the concreteness of the contract is established when the information request is made from the user terminal side, it is possible to execute a more flexible contract.

(C) Other Embodiments In the above description, various modified embodiments have been described, but the present invention is not limited to the above description. Below, some other embodiments are illustrated.

(1) Each of the above embodiments is premised on packet communication, but the communication method is not limited to packet communication. Further, the packet communication may be either a fixed length packet or a variable length packet. Although not described in the above as it is not related to the features of the present invention, it goes without saying that a general communication procedure such as retransmission may be introduced.

(2) In each of the above embodiments, encryption,
Although the decryption process is shown, if the network 3 is closed and dedicated, these processes may be omitted to construct the system. Also, the encryption process may be the same regardless of the type of transfer target information.

(3) In each of the above-mentioned embodiments, the filtering based on the contract type information label and the filtering based on the type information are shown, but only the filtering based on the type information may be performed.
Further, the filtering may be performed by combining the type information and the time information. For example, regarding the latter, the time zone in which baseball results, horse odds, etc. are required is fixed, so that the type information that can be received, including the time zone that allows reception, is managed on the user terminal side. ,
The time information may be filtered by the time information identifying unit.

(4) In each of the above embodiments, the user terminal and the server separately input the contractor information, but the server transmits the contractor information to the user terminal to identify the information type of the user terminal. You may make it set to a department.

(5) In each of the above embodiments, the reception response is not returned from the user terminal to the server at the time of receiving the information transfer packet, but it is received at the completion of reception of a series of information transfer packets related to the same information. The response may be returned to the server. In this case, the charging may be updated at the time of this reception response.

(6) It goes without saying that the method of presenting the information received and stored by the user terminal to the user is not limited to that in the above embodiment.

(7) Of course, the number of layers of classification of transfer target information is not limited to that of the above embodiment.

(8) In each of the above embodiments, the time information is inserted in the information section, but it may be inserted in the header section (label section). In this case, the order of the packets can be judged at an early stage. Similarly, the type information may also be inserted in the header part (label part).

(9) In each of the above-mentioned embodiments, the type information to be inserted into the packet is the data defining the content thereof, but only the ID may be transmitted.

(10) In each of the above embodiments, an information transfer system including a server and a user terminal is shown. However, an auxiliary server is provided between the server and the user terminal, and between the server and the auxiliary server as in the above embodiments. The communication method may be performed between the auxiliary server and the user terminal as well as the above communication method. For example,
In the case of an electronic newspaper, the communication method is suitable for a two-stage transfer system such as information transfer from a newspaper company to a store and information transfer to a store and each home.

(11) In each of the above-described embodiments, the information transmission operation is performed at the time of newly inputting or updating the information to be provided, but whether or not there is new input or updated information at every predetermined cycle. It is also possible to confirm and start the transmission operation at that time. That is, the greatest feature of the present invention lies in the filtering function, and the information transmission timing is not limited to that of the above embodiment.

(12) In the second embodiment, the type information and the decryption key are transmitted at different timings, but the type information and the decryption key may be transmitted at the same time. Note that such a method is suitable for a closed network in consideration of the confidentiality of the decryption key.

(13) In the second embodiment, the case where the decryption key is transmitted when the information transfer request is given has been described. However, the decryption key may be periodically transmitted as in the first embodiment. May be.

[0159]

As described above, according to the information transfer system, the information storage / providing device, and the information-provided device of the present invention, by transmitting / receiving the time information indicating the transmission time (not the update time) of the transfer target information, The information-provided device can check the latestness of the transfer target information received this time and the order of the information when it is divided into a plurality of times, and by adjusting the internal clock to that time, the time of the entire information transfer system can be confirmed. You will be able to be unified and accurate.

If the type information transfer function is incorporated in the present invention, it is possible for the information-provided device to confirm the existence of the transfer target information that has been newly input or updated, and the type information can be newly input or updated. Through the transfer of the type information related to the transferred information that has been transferred, the information-provided device can confirm the existence of the transfer-target information newly input or updated, and
Based on the type information, the necessity of the transfer target information is confirmed and taken in, so that the information desired by the information-provided device can be efficiently obtained in near real time among various frequently updated information. Also, the load on the network can be reduced.

[Brief description of drawings]

FIG. 1 is a functional block diagram showing a detailed configuration of a server according to a first embodiment.

FIG. 2 is a block diagram showing a network connection configuration of the system.

FIG. 3 is an explanatory diagram showing a format of an information transfer packet according to the first embodiment.

FIG. 4 is a functional block diagram showing a detailed configuration of a user terminal according to the first embodiment.

FIG. 5 is a flowchart showing an encryption key generation process of the first embodiment.

FIG. 6 is a functional block diagram showing a detailed configuration of a server according to the second embodiment.

FIG. 7 is an explanatory diagram showing an information section format of various packets according to the second embodiment.

FIG. 8 is a functional block diagram showing a detailed configuration of a user terminal according to the second embodiment.

FIG. 9 is a sequence diagram showing a system operation of the second exemplary embodiment.

[Explanation of symbols]

1-1 to 1-m ... User terminal (information provided device), 2-
1-2-n ... server (information storage / providing device), 3 ... network, 10 ... terminal transmitting / receiving unit, 11 ... information type identifying unit,
12 ... Time information identification unit, 13 ... Decryption unit, 14 ... Decryption key storage unit, 15 ... Information processing unit, 16 ... Information storage unit, 1
7 ... Information input / output unit, 20 ... Input / output unit, 21 ... Information search management unit, 22 ... Information storage unit, 23 ... Encryption unit, 24 ... Encryption key generation unit, 25 ... Time information generation unit, 26 ... Information Type generation unit, 27 ... Server input / output unit.

Continuation of the front page (56) Reference JP-A-7-334508 (JP, A) JP-A-5-130141 (JP, A) JP-A-5-81153 (JP, A) JP-A-8-115337 (JP , A) JP-A-8-123747 (JP, A) Koichi Nakajima, 2 others, A Study on Timing in TV Conference System Using ATM Network, IEICE Technical Report, Japan, Japan Electronics Corporation The Institute of Information and Communication Engineers, September 19, 1991, Vol. 91, No. 219, 9-15 (58) Fields surveyed (Int.Cl. ⁷ , DB name) G06F 13/00 G06F 12/00

Claims (13)

(57) [Claims] 1. An information transfer system in which at least one information storage / providing device and a plurality of information-provided devices for receiving information broadcast from the information storage / providing device are connected via a network, In the case where each of the information storage / providing devices described above includes a time information generation unit that causes the transmission signal to include time information relating to the time of transmission of newly input or updated input transfer target information, and when newly input or update input of transfer target information. only,
A transmission signal in which at least the newly input or updated input transfer target information and time information are inserted, is provided to the above-mentioned information-provided device side, and the providing-side communication means is provided, The providing device identifies the communication means on the receiving side that receives the transmission signal from one of the information storage providing devices that has arrived via the network, and the time information included in the received transmission signal, and the time identified this time. Compare the information with the previously identified time information related to the transfer target information received this time, and discard the transfer target information received this time if the transfer target information received this time is transmitted earlier An information transfer system, comprising: 2. As a result of the time information identifying means comparing the time information identified this time with the time information identified last time, if the transfer target information received this time is later transmitted, it is identified this time. The information transfer system according to claim 1, characterized in that a clock in the information-provided device is adjusted to the time information. 3. The time information identifying means, based on the identified time information, when a plurality of transmission signals in which the newly input or updated input transfer target information is divided into a plurality of transmission signals sequentially arrives, The information transfer system according to claim 1 or 2, wherein the order is confirmed, and when the order is not appropriate, the order is corrected. 4. The information storage / providing device further includes type information generating means for causing a transmission signal to include type information indicating a type of newly input or updated input transfer target information, and each of the information storage devices described above. The providing device contains the type information of the transfer target information that can be received by itself, and collates the type information included in the received transmission signal with the included type information,
The information transfer system according to any one of claims 1 to 3, further comprising an information type identification unit that determines the necessity of newly input or updated input transfer target information related to the type information. 5. The providing-side communication means uses the same time information generated by the time information generating means, the type information generated by the type information generating means, and the newly input or updated input transfer target information. The information transfer system according to claim 4, wherein the information transfer system inserts the signal in a transmission signal and transmits the signal. 6. A transmission signal in which the providing-side communication means of each of the information storage / providing devices does not include newly input or update-input transfer target information and time information, but includes the type information generated by the type information generating means. The information type identifying means of each of the information-provided devices transmits the received transmission signal when the comparison result of the type information included in the received transmission signal and the built-in type information does not match. , And when they match, a transmission signal requesting information transfer is transmitted from the communication means on the provided side, and the communication means on the providing side of each of the information storage providing devices receives the transmission signal requesting information transfer. The information transfer system according to claim 4, wherein a transmission signal including the newly input or updated input transfer target information and time information is transmitted. 7. The type information according to claim 4, wherein the type information includes identification information of the information storage / providing device as a transmission source and type information in each hierarchically classified category. Information transfer system described in Crab. 8. The time information is inserted into the label portion in a transmission signal format including a label portion into which bibliographic items related to transmission such as a destination are inserted and an information portion into which transmission information is inserted. The information transfer system according to any one of claims 1 to 7, characterized in that. 9. The information storage / providing device further comprises an encryption means for encrypting transfer target information, and the information provided device determines that the type information can be received by the information type identifying means. 9. The information transfer system according to claim 1, further comprising a decryption unit that decrypts the already-encrypted transfer target information. 10. The information transfer system according to claim 9, wherein the encryption means performs different encryption depending on the type of transfer target information to be transmitted. 11. The providing side communication means inserts a contract communication type label indicating a transmission signal related to contract communication into a label portion of a transmission signal transmitted from itself, and transmits the label, and the provided side communication. 11. The means receives the transmission signal from any of the information storage / providing devices that has arrived via the network after confirming that the transmission signal can be received based on the contract communication type label. Information transfer system according to any one of. 12. An information transfer system in which at least one information storage / providing device and a plurality of information-provided devices receiving the information broadcasted from the information storage / providing device are connected via a network. In the information-provided device in, the communication means on the receiving side that receives the transmission signal from one of the information storage / providing devices that has arrived via the network and the time information included in the received transmission signal are identified. Compare the identified time information with the previously identified time information related to the transfer target information received this time, and if the transfer target information received this time is the one sent earlier, the transfer target received this time An information-provided device, comprising: time information identifying means for discarding information. 13. The type information of transfer target information which can be received by itself is built-in, and the type information included in the received transmission signal is collated with the built-in type information to determine the type information. 13. The information provided apparatus according to claim 12 , further comprising an information type identification unit that determines the necessity of newly input or updated input transfer target information.