JP4725525B2 - Distributed information system and communication method - Google Patents

Description

  The present invention relates to a distributed information system that includes a plurality of distributed information devices connected to a network and uses object data that has been changed in one distributed information device by an application that is executed in another distributed information device.

For example, in an entrance / exit management system, there is a control method called anti-passback control. Anti-passback control tracks the route between the person entering and leaving the room across multiple rooms, generating information that does not enter the room, but on the other hand, there is no information that leaves the room. It is intended to monitor contradictions such as the occurrence of information that attempts to enter the room.
In the anti-passback control, a controller that controls a card reader or an electric lock provided on a gate needs to grasp a person's whereabouts (the last gate and the direction of passage of the gate). For this reason, a plurality of controllers cooperate with each other in a flexible and real-time manner, the card ID read from the ID card by the card reader and the gate ID of the passed gate (indicating the passed gate and the passing direction of the gate). Communicate.

As a mechanism in which a plurality of devices communicate flexibly, there is “distributed object communication” (see, for example, Non-Patent Document 1). In distributed object communication, every time an application running on a device needs an object, it queries the registry server as to which device the object is in, and information about the existence of the object based on the inquiry result. Inquires the source device.
Oizumi Osamu, "All of the distributed object technology understood by illustration", Nippon Jitsugyo Shuppansha, October 18, 2001

In distributed object communication, the following procedure is executed until an application acquires an object.
The application requests a value from the stub, and the stub queries the registry server for the location (eg, IP address) of the device that has the object. In response to this inquiry, the registry server returns the location of the device having the object.

The stub requests a value from the skeleton of the device having the object based on the response result, and the skeleton returns a value in response to this request. The stub passes the received value to the application.
As described above, in distributed object communication, since an application acquires an object, communication is performed a plurality of times between devices, and thus it takes time until the application acquires an object.

Therefore, there is a problem that distributed object communication is not suitable for a system that needs to perform communication in real time such as an entrance / exit management system.
Therefore, according to the present invention, when an application running on a plurality of distributed information devices connected to a network uses the same object data, the object data can be acquired immediately after the application needs the object data. An object is to provide a distributed information system and a communication method.

  In order to achieve the above object, the distributed information system of the present invention has a plurality of distributed information devices connected to a network, and object data changed in one distributed information device is executed in another distributed information device. In the distributed information system used by the application, the distributed information device stores data storage means for storing object data used by the application and distributed device information indicating other distributed information devices that execute the application using the object data. When the device information storage means to perform and the trigger for changing the object data occurs in the own device, the changed object data is sent to the distributed information device indicated by the distributed device information stored in the device information storage means. Send to the network to supply And sending means that, via the network to receive the modified object data by other distributed information apparatus, and a reception processing means for rewriting to the object data stored contents of said data storage means.

  The communication method of the present invention is performed between distributed information devices connected to a network, and object data changed in one distributed information device is transferred to another distributed information device in which an application using the object data is executed. In the communication method to be supplied, when one of the distributed information devices has an opportunity for changing the object data in the own device, the distributed device information stored in the device information storage unit is changed to the changed object data. Sent to the network to be supplied to another distributed information device that executes an application that uses the object data indicated, and the other distributed information device is sent by the one distributed information device via the network. Received object data, and based on the received object data It updates the stored contents of the data storage means for storing object data used by the application.

  According to the distributed information system, the distributed information device stores therein the distributed device information indicating another distributed information device on which an application using object data is operating. When the object data is changed, the changed object data is supplied to the distributed information device indicated by the distributed device information, and the distributed information device to which the changed object data is supplied receives the changed object data. Remember inside. For this reason, when the application requires object data, the latest object data exists in the distributed information device in which the application is operating, so the application can immediately acquire the object data.

  In the above distributed information system, the shared information device further includes a determination unit that determines whether an occurrence state of the change of the object data in the own device satisfies a predetermined condition, and the transmission unit includes the determination unit If it is determined that the occurrence status does not satisfy the condition, the object data is transmitted to the distributed information device indicated by the distributed device information when the object data is changed, and the occurrence status is determined by the determination unit. Is determined to satisfy the condition, the aggregated object data obtained by combining the changed object data and the distributed device information together at a predetermined timing is sent out the object data. You may make it carry out by sending to a network.

  According to this, when the change of the object data occurs continuously in a short time, for example, it is possible to reduce the number of times that the distributed information device sends the information regarding the changed object data to the network. For this reason, the processing load related to communication of the distributed information device can be suppressed, and the distributed information device can use more processing power of the own device for processing other than processing related to communication.

  Further, for example, when communication between distributed information devices is realized by TCP (Transmission Control Protocol) / IP (Internet Protocol) communication, transmission / reception is performed between distributed information devices operating as authentication terminals, such as an entrance / exit management system. The object data includes a card ID and a gate ID, and the data size is as small as several tens of bytes. When each of the changed object data is individually processed for TCP / IP communication, the number of times of processing for TCP / IP communication is large, and the header information occupies the total data sent by the distributed information device. The proportion increases. On the other hand, if the changed object data is sent together, the number of processings for TCP / IP communication is reduced, and the ratio of header information to the total data sent by the distributed information device can be kept low. .

  In the above distributed information system, the distributed information system further includes a transmission agent device that performs mediation for supplying object data from the distributed information device to another distributed information device, and the sending means includes the aggregated object data Sending to the transmission agent device, the transmission agent device receives aggregated object data via the network, and each piece of object data included in the received aggregated object data is distributed device information paired with the object data May be provided with a transmission proxy means for sending to the network addressed to the distributed information device.

According to this, it is possible to use a low-performance distributed information device with a low communication load for the distributed information device to send the changed object data. As a result, it is necessary to provide a dedicated transmission proxy device separately, but the cost of the entire system can be kept low by using a low-performance distributed information device.
In the above distributed information system, the distributed information device includes a transmission agent device that performs mediation for supplying object data from the own device to another distributed information device, from among the distributed information devices connected to the network. And selecting means for selecting by a predetermined method, wherein the sending means sends the aggregated object data to the distributed information device selected by the selecting means, and the distributed information device is connected to the other via the network. The aggregated object data transmitted by the distributed information device is received, and each object data included in the received aggregated object data is transmitted to the network to the distributed information device indicated by the distributed device information paired with the object data. You may make it provide a substitute means further.

  For example, if the predetermined method is to select a distributed information device that is predicted to have a low processing load at the present time as a transmission proxy device, a distributed information device with a low processing load at the current time is selected as the distributed proxy device. For this reason, it is not necessary to use a high-performance device as the distributed information device in order to make the distributed information device function as a transmission proxy device. For this reason, a dedicated transmission proxy device is not required, and it is not necessary to use a high-performance distributed information device, so that the cost of the entire system can be kept low.

  In the above distributed information system, the distributed information system further includes a transmission agent device that mediates supply of object data from the distributed information device to another distributed information device, and the distributed device information is executed by software. Group information indicating a group to which another distributed information device belongs, and the sending means sends the object data to the network to the transmission agent device as a pair of the object data and the group information. The transmission agent device performs expansion device information storage means for storing, for each group information, expansion distributed device information indicating the distributed information device belonging to the group information, and a pair of object data and group information via the network. And associate the object data with the group information A transmission proxy means for sending to the network in the distributed equipment information addressed showing deployment dispersing device information stored in the expansion device information storage unit may be provided with a.

According to this, since the distributed device information is group information indicating a group to which another distributed information device belongs, the amount of data transmitted from the distributed information device to the transmission proxy device can be reduced.
In the above distributed information system, the sending means sends the object data at a predetermined timing based on the distributed equipment information stored in the equipment information storage means for each changed object data. The aggregated object data obtained as a unit may be sent to the distributed information device to the network.

  According to this, when the change of the object data occurs continuously in a short time, for example, it is possible to reduce the number of times that the distributed information device sends the information regarding the changed object data to the network. For this reason, the processing load related to communication of the distributed information device can be suppressed, and the distributed information device can use more processing power of the own device for processing other than processing related to communication.

  In the above distributed information system, the shared information device further includes a determination unit that determines whether a processing status of another shared information device satisfies a predetermined condition, and the sending unit determines whether the processing status is determined by the determination unit. The object data is sent to the distributed information device that is determined not to satisfy the condition when the object data is changed, and the processing status is determined to satisfy the condition by the determination unit. Aggregated object data obtained by grouping distributed object devices based on distributed device information stored in the device information storage means at a predetermined timing when sending object data is distributed information devices It may be performed by sending it to the network.

  According to this, for example, a distributed information device having a large processing load at the present time can reduce the number of times object data is received, and the processing load related to communication of the distributed information device on the object data receiving side can be reduced. Further, in the distributed information device having a small processing load at the present time, the time until the changed object data is received after the object data is changed in another distributed information device is shortened.

  In the above distributed information system, the distributed information system further includes a reception agent device that performs mediation for supplying object data from the distributed information device to another distributed information device, and the transmission unit transmits the object data. By sending a pair of the object data and the distributed device information to the receiving proxy device to the network, and the receiving proxy device receives the pair of the object data and the distributed information device via the network. Then, at a predetermined timing, aggregated object data obtained by grouping each received object data in units of distributed information devices based on the paired distributed device information is sent to the network to the corresponding distributed information device. You may make it provide a reception proxy means.

  According to this, when the change of the object data supplied to a certain distributed information device continuously occurs in the distributed information device within a predetermined period, for example, the changed object data is collected by the receiving proxy device. Is sent to the certain distributed information device. For this reason, the number of times that a certain distributed information device receives information related to object data is reduced, and the processing load related to communication of the certain distributed information device can be suppressed.

<< First Embodiment >>
Hereinafter, a first embodiment of the present invention will be described with reference to the drawings.
<System configuration>
A system configuration of the distributed information system according to the present embodiment will be described with reference to FIG. FIG. 1 is a system configuration diagram of a distributed information system according to the present embodiment.

The distributed information system includes a plurality of distributed information devices 1a, 1b, 1c,... And a transmission proxy device 2 connected to the network 3. However, an application executed on all or part of the distributed information device may execute processing using the same object value (corresponding to object data).
When an opportunity to change the object value occurs in any one of the distributed information devices, the one distributed information device changes the other distributed information devices on which the application using this object value is operating. Supply the object value of. As an opportunity for changing the object value, for example, a card ID (part of the object value) read from the ID card by a card reader (not shown) controlled by the distributed information device is input from the card reader. And an object value is input from an input device connected to the distributed information device. However, even if the distributed information device receives an object value from another shared information device, it changes the object value in its own device. This is an opportunity for changing the object value generated in its own device. is not.

  (1) A distributed information device (hereinafter referred to as a transmission source device) in which an opportunity for changing an object value has occurred has the object value changed when the frequency of changing the object value in the own device is less than a predetermined threshold. At the time of change, header information (TCP header or IP header) is added to the object value to each of other distributed information devices (hereinafter referred to as destination devices) on which the application using the object value is operating. Send the packet to the network 3. The destination device receives the packet and internally holds the changed object value.

  (2) When the change frequency is equal to or higher than the threshold, the transmission source device has each object value changed within a predetermined period and the distributed information device to which the object value is transmitted (an application using the object value) A pair of distributed device information indicating other distributed information devices (operating) is collected (aggregated) to create one piece of information. Then, the transmission source device sends to the transmission agent device 2 a packet in which header information is added to the information created by aggregation, and the transmission agent device 2 receives the packet.

The transmission proxy device 2 sends each packet aggregated object value in the received packet to the distributed information device indicated by the paired distributed device information, and sends a packet with the header value added to the object value to the network 3. . The destination device receives the packet and internally holds the changed object value.
In the above case, the procedure of (1) and (2) is switched depending on whether or not the change frequency of the object value is greater than or equal to the threshold value, but the change interval of the object value is a predetermined value. The above (1) and the above (1) and the above (2) are switched depending on whether or not the time is less than the time. Any method may be used as long as the procedure with (2) is switched.

<Functional configuration of distributed information device>
The functional configuration of the distributed information devices 1a, 1b, and 1c in FIG. 1 will be described with reference to FIG. FIG. 2 is a functional configuration diagram of the distributed information devices 1a, 1b, and 1c of FIG.
Note that the distributed information devices 1a, 1b, and 1c are, for example, authentication terminals that control a card reader or an electric lock provided at a gate and exchange a pair of a card ID and a gate ID (one of object values) with each other. It is. The authentication terminal performs authentication such as unlocking of an electric lock by performing authentication using a card ID input from a card reader, or a card ID input from a card reader or a card ID received from another authentication terminal Anti-passback control is performed using a pair with a gate ID.

The distributed information devices 1a, 1b, and 1c include a control application unit 101, an object value database (object value DB) 102, a transmission destination list database (transmission destination list DB) 103, a transmission control unit 104, and a transmission management unit 105. And an aggregation unit 106, an aggregation database (aggregation DB) 107, a communication processing unit 108, and a reception control unit 109.
One or more applications are operating in the control application unit 101. The application writes the changed object value to the object value database 102, outputs the changed object value and the object number corresponding to the object value to the transmission control unit 104, and indicates that the object value has changed. The change occurrence notification information shown is output to the transmission management unit 105. Further, the control application unit 101 refers to the object value in the object value database 102.

The object value database 102 stores object values for each object number, an example of which is shown in FIG.
In the example of FIG. 3, a pair of a card ID and a gate ID is stored for the object number “1”. The pair of card ID and gate ID indicates the location of the owner of the ID card and is used for anti-passback control.

The destination list database 103 stores, for each object number, the destination address of each of the distributed information devices other than the own device on which the application using the object value relating to the object number is running, an example of which is shown in FIG. Shown in In this embodiment, the destination address is an IP address, but it may be a MAC address or the like.
In the example of FIG. 4, the distributed information device to which the object value of the corresponding object number is transmitted to “transmission destination address (1)”, “transmission destination address (2)”, and “transmission destination address (3)”. A transmission destination address is registered in advance. A pair of transmission destination addresses stored in association with the object number corresponds to distributed device information indicating a distributed information device other than the own device on which an application using the object value of the object number is operating.

  The transmission control unit 104 receives the changed object value and the object number corresponding to the object value from the control application unit 101. The transmission control unit 104 inquires the storage contents of the transmission destination list database 103 and identifies all transmission destination addresses (hereinafter referred to as transmission destination addresses) associated with the input object numbers. The transmission control unit 104 outputs the input object number and object value and the specified transmission destination address group to the transmission management unit 105.

  Change occurrence notification information is input from the control application unit 101 to the transmission management unit 105, and an object value change frequency (indicating an occurrence state of an object value change based on the number of change occurrence notification information input within a predetermined period) It is determined whether (information) is equal to or greater than a predetermined threshold. The transmission management unit 105 outputs the object number, the object value, and the transmission destination address group input from the transmission control unit 104 to the communication processing unit 108 when the change frequency is less than a predetermined threshold. On the other hand, the transmission management unit 105 outputs the object number, the object value, and the transmission destination address group input from the transmission control unit 104 to the aggregation unit 106 when the change frequency is equal to or higher than a predetermined threshold.

The aggregation unit 106 receives the object number, the object value, and the destination address group from the transmission management unit 105, and the aggregation unit 106 receives a pair of the input object number, the object value, and the destination address group (hereinafter referred to as an aggregation object). Stored in the aggregate database 107.
The aggregation unit 106 aggregates the aggregation object values stored in the aggregation database 107 into one piece of information after a predetermined time has elapsed (hereinafter referred to as an aggregate object value). Is output to the communication processing unit 108. However, for example, when the distributed information device operates as an authentication terminal, a person moves from the target gate controlled by the own device to the target gate controlled by the distributed information device to which the object value is supplied. It is determined in consideration of time.

The aggregation database 107 stores a pair (object value for aggregation) of an object number, an object value, and a destination address group.
An object number, an object value, and a destination address group are input from the transmission management unit 105 to the communication processing unit 108, and the communication processing unit 108 sends an object address to the distributed information device of each destination address constituting the destination address group. A packet in which header information is added to a pair of a number and an object value is sent to the network 3.

The aggregated object value is input from the aggregating unit 106 to the communication processing unit 108, and the communication processing unit 108 sends a packet in which header information is added to the aggregated object value to the transmission proxy device 2 to the network 3. The distributed information devices 1a, 1b, and 1c store in advance a destination address of the transmission proxy device 2 in a memory (not shown).
The communication processing unit 108 detects a packet addressed to the own device from the packets transmitted through the network 3, and outputs information in the packet addressed to the own device to the reception control unit 109.

Information in the packet is input to the reception control unit 109 from the communication processing unit 108, and the reception control unit 109 rewrites the stored contents of the object value database 102 based on the input information (a pair of object number and object value). .
<Functional configuration of transmission agent device>
The functional configuration of the transmission proxy device 2 in FIG. 1 will be described with reference to FIG. FIG. 5 is a functional configuration diagram of the transmission proxy device 2 of FIG.

The transmission proxy device 2 includes a reception control unit 201, a transmission control unit 202, and a communication processing unit 203.
The reception control unit 201 receives the aggregate object value in the packet from the communication processing unit 203, and the reception control unit 201 converts the input aggregate object value into an aggregation object value (object number, object value, and destination address group). The aggregation object values are sequentially output to the transmission control unit 202.

Aggregation object values are sequentially input from the reception control unit 201 to the transmission control unit 202, and the input aggregation object values are sequentially output to the communication processing unit 203.
The communication processing unit 203 detects a packet addressed to the own device from the packets transmitted through the network 3, and outputs information (aggregated object value) in the packet addressed to the own device to the reception control unit 201.

Aggregation object values are sequentially input from the transmission control unit 202 to the communication processing unit 203, and the header information for the pair of the object number and the object value is sent to the distributed information device of each transmission destination address constituting the transmission destination address group. Is sent to the network 3.
<Operation flow of distributed information device>
The operation flow of the distributed information devices 1a, 1b, and 1c in FIG. 2 will be described with reference to FIG. FIG. 6 is a flowchart showing an operation flow of the distributed information devices 1a, 1b, and 1c of FIG.

When the communication processing unit 108 receives a packet including an object value addressed to itself from the network 3 (step S101: YES), the reception control unit 109 stores the object value database 102 based on the object number and the object value in the packet. The stored contents are updated (step S102).
If not received (step S101: NO), the transmission management unit 105 determines whether the change frequency of the object value is equal to or higher than a predetermined threshold based on the monitoring result of the change frequency of the object value (step S101). S103).

When it is determined in the determination process of step S103 that the change frequency is less than the threshold value (step S103: NO), the change frequency is the threshold value or more when the change frequency is changed from the situation of the threshold value or more to the situation of the threshold value or less. , Processing for transmitting untransmitted information stored in the aggregate database 107 is performed.
The aggregation unit 106 determines whether the aggregation flag is on (step S104).

  If it is determined in the determination processing in step S104 that the aggregation flag is on (step S104: YES), the aggregation unit 106 aggregates the aggregation object values stored in the aggregation database 107 into one piece of information and aggregates the information. The information (aggregated object value) created in this way is output to the communication processing unit 108 (step S105). Then, the communication processing unit 108 sends a packet with header information added to the aggregate object value to the transmission proxy device 2 (step S106), and the aggregation unit 106 sets the aggregation flag to off (step S107).

If it is determined in the determination process in step S104 that the aggregation flag is off (step S104: NO), the transmission control unit 104 determines whether the object value has been changed (step S108). If there is no change in the object value (step S108: NO), the process of step S101 is performed.
If there is a change in the object value (step S108: YES), the distributed information device updates the stored contents of the object value database 102 in its own device based on the changed object value and the object number corresponding to the object value. Done. The transmission control unit 104 inquires about the storage contents of the transmission destination list database 103 and specifies all transmission destination addresses (transmission destination address group) associated with the object number corresponding to the changed object value (step). S109). The transmission control unit 104 outputs the object number, the object value, and the specified destination address group to the transmission management unit 105, and the transmission management unit 105 further outputs them to the communication processing unit 108. Then, the communication processing unit 108 sends out a packet in which header information is added to the pair of the object number and the object value to the distributed information device of each transmission destination address constituting the transmission destination address group (step S110).

If it is determined in the determination process of step S103 that the change frequency is greater than or equal to the threshold (step S103: YES), the aggregating unit 106 determines whether the aggregation flag is off (step S111). If it is determined that the aggregation flag is off (step S111: YES), the aggregation unit 106 sets the aggregation flag on (step S112).
If it is determined that the aggregation flag is on (step S111: NO), the aggregation unit 106 determines whether the specified time has elapsed (step S113). This determination can be realized, for example, by using a counter circuit that counts clock pulses.

If it is determined in the determination process in step S113 that the specified time has not elapsed (step S113: NO), the transmission control unit 104 determines whether the object value has been changed (step S114). If there is no change in the object value (step S114: NO), the process of step S101 is performed.
If there is a change in the object value (step S114: YES), the distributed information device updates the contents stored in the object value database 102 in its own device based on the changed object value and the object number corresponding to the object value. Done. The transmission control unit 104 inquires about the storage contents of the transmission destination list database 103 and specifies all transmission destination addresses (transmission destination address group) associated with the object number corresponding to the changed object value (step). S115). The transmission control unit 104 outputs the object number, the object value, and the specified destination address group to the transmission management unit 105, and the transmission management unit 105 further outputs them to the aggregation unit 106. The aggregation unit 106 stores the input object number, object value, and destination address group pair (aggregation object value) in the aggregation database 107 (step S116).

  If it is determined in the determination process of step S113 that the specified time has elapsed (step S113: YES), the aggregation unit 106 aggregates the aggregation object values stored in the aggregation database 107 into one piece of information, The information created by aggregation (aggregated object value) is output to the communication processing unit 108 (step S117). Then, the communication processing unit 108 transmits a packet with header information added to the aggregate object value to the transmission proxy device 2 (step S118).

<Operation flow of transmission agent device>
The operation flow of the transmission proxy device 2 in FIG. 5 will be described with reference to FIG. FIG. 7 is a flowchart showing an operation flow of the transmission proxy device 2 of FIG.
When the communication processing unit 203 receives a packet including an aggregate object value addressed to itself from the network 3 (step S151: YES), the reception control unit 201 converts the aggregate object value in the packet into an aggregate object value (object number and object The aggregation object value is sequentially output to the transmission control unit 202 (step S152). The transmission control unit 202 sequentially outputs the aggregation object value to the communication processing unit 203. Then, the communication processing unit 203 sends a packet in which header information is added to the pair of the object number and the object value to the distributed information device of each transmission destination address constituting the transmission destination address group (step S153).

<Operation sequence of distributed information system: direct transmission>
An operation sequence of the distributed information system of FIG. 1 will be described with reference to FIG. FIG. 8 is a diagram showing an operation sequence of the distributed information system of FIG. However, FIG. 8 shows a case where the distributed information device whose object value has been changed directly transmits the changed object value to another distributed information device.

Note that the shared information device 1a is a shared information device in which the object value has been changed, and the shared information device 1b is a shared information device that receives the changed object value.
The transmission management unit 105 of the shared information device 1a monitors the change frequency of the object value and determines that the change frequency is less than the threshold value (step S201). In the distributed information device, the contents stored in the object value database 102 in the own device are updated based on the changed object value and the object number corresponding to the object value.

  The transmission control unit 104 detects the change of the object value (step S202), inquires the stored contents of the transmission destination list database 103, and all the transmission destination addresses associated with the object number corresponding to the changed object value. (Destination address group) is specified (step S203). The transmission control unit 104 outputs the object number, the object value, and the specified transmission destination address group to the transmission management unit 105 (step S204).

  Since the change frequency is less than the threshold, the transmission management unit 105 outputs the object number, the object value, and the transmission destination address group to the communication processing unit 108 (step S205). The communication processing unit 108 transmits a packet in which header information is added to a pair of an object number and an object value to the distributed information device of each transmission destination address constituting the transmission destination address group (step S206).

  The communication processing unit 108 of the shared information device 1b receives the packet including the object value addressed to itself, and outputs a pair of the object number and the object value in the received packet to the reception control unit 109 (step S207). The reception control unit 109 updates the stored contents of the object value database 102 based on the input object number and object value (step S208).

  As shown in the operation sequence of FIG. 8, when the shared information device changes the object value in another shared information device, the changed shared object device sends the changed object value to the object The stored contents of the value database 102 are rewritten with the changed object value. For this reason, since the latest object value is held in the distributed information device in which the application is operating, the application can acquire the object value in a short time.

<Distributed Information System Operation Sequence: Aggregating Information and Sending via Transmission Agent>
The operation sequence of the distributed information system of FIG. 1 will be described with reference to FIG. FIG. 9 is a diagram showing an operation sequence of the distributed information system of FIG. However, in FIG. 9, the distributed information device in which the object value has been changed aggregates the changed object value, transmits the aggregated object value to the transmission agent device 2, and each object value in which the transmission agent device 2 is aggregated Is transmitted to other distributed information devices.

Note that the shared information device 1a is a shared information device in which the object value has been changed, and the shared information device 1b is a shared information device that receives the changed object value.
The transmission management unit 105 of the shared information device 1a monitors the change frequency of the object value and determines that the change frequency is equal to or higher than the threshold (step S251).
The transmission control unit 104 detects the change of the object value (step S252), inquires the storage contents of the transmission destination list database 103, and all the transmission destination addresses associated with the object number corresponding to the changed object value. (Destination address group) is specified (step S253). In the distributed information device, the contents stored in the object value database 102 in the own device are updated based on the changed object value and the object number corresponding to the object value. The transmission control unit 104 outputs the object number, the object value, and the specified transmission destination address group to the transmission management unit 105 (step S254).

  The transmission management unit 105 outputs the pair of the object number, the object value, and the transmission destination address group to the aggregation unit 106 because the change frequency is equal to or higher than the threshold (step S255). The aggregation unit 106 stores the input object number / object value / destination address group pair (aggregation object value) in the aggregation database 107 (step S256).

It should be noted that the processing from step S252 to step S256 is performed for each object value that has been changed before the specified time elapses, and the aggregation object value relating to the changed object value is accumulated in the aggregation database 107. Is done.
When the aggregation unit 106 determines that the specified time has elapsed (step S257), the aggregation unit 106 aggregates the aggregation object values stored in the aggregation database 107 into one piece of information to create an aggregate object value (step S257). S258). Then, the aggregating unit 106 outputs the aggregated object value to the communication processing unit 108 (step S259), and the communication processing unit 108 sends a packet with header information added to the aggregated object value to the transmission proxy device 2 (step S259). S260).

  The communication processing unit 203 of the transmission proxy device 2 receives the packet including the aggregate object value addressed to itself, and outputs the aggregate object value in the received packet to the reception control unit 201 (step S261). The reception control unit 201 divides the aggregated object value into aggregated object values (a pair of object number, object value, and destination address group) (step S262), and sequentially outputs the aggregated object value to the transmission control unit 202 (step S262). S263). The transmission control unit 202 outputs the aggregation object value to the communication processing unit 203 (step S264).

The communication processing unit 203 sends a packet in which header information is added to the pair of the object number and the object value to the distributed information device of each transmission destination address constituting the transmission destination address group (step S265).
The communication processing unit 108 of the shared information device 1b receives the packet including the object value addressed to the own device, and outputs a pair of the object number and the object value in the received packet to the reception control unit 109 (step S266). The reception control unit 109 updates the stored contents of the object value database 102 based on the input object number and object value (step S267).

Note that the processing from step S263 to step S267 is performed for each pair of object number, object value, and destination address group.
As shown in the operation sequence of FIG. 9, when the shared information device changes the object value in another shared information device, the changed object value is transmitted from the other shared information device via the transmission proxy device 2. The stored contents of the object value database 102 are rewritten to the changed object values. For this reason, since the latest object value is held in the distributed information device in which the application is operating, the application can acquire the object value in a short time.

  As shown in the operation sequence of FIG. 9, when a change in object value occurs continuously in a short time in the distributed information device, the distributed information device uses the object value changed within a specified time as one piece of information. Are transmitted to the transmission proxy device 2. For this reason, the processing load for TCP / IP communication of the distributed information device is reduced, and a low-function device can be used as the distributed information device. As a result, it is necessary to separately provide a transmission proxy device, but the cost of the entire system can be suppressed by using a low-function device as the distributed information device.

<< Second Embodiment >>
The second embodiment of the present invention will be described below with reference to the drawings.
<System configuration>
A system configuration of the distributed information system according to the present embodiment will be described with reference to FIG. FIG. 10 is a system configuration diagram of the distributed information system according to the present embodiment.

The distributed information system includes a plurality of distributed information devices 5 a, 5 b, 5 c,.
However, in the first embodiment, the distributed information device (sender device) that has triggered the change of the object value uses the aggregate object value in the first embodiment when the change frequency of the object value in the own device is equal to or greater than a predetermined threshold. Is sent to the network 3 addressed to the transmission proxy device 2.

On the other hand, in the present embodiment, the transmission source device selects one distributed information device as a transmission proxy device from among the distributed information devices connected to the network 6 by a predetermined method to be described later, and collects the aggregate object. The value is transmitted to the network 6 to the selected distributed information device.
<Functional configuration of distributed information device>
The functional configuration of the distributed information devices 5a, 5b, and 5c in FIG. 11 will be described with reference to FIG. FIG. 11 is a functional configuration diagram of the distributed information devices 5a, 5b, and 5c in FIG. However, components having substantially the same functions as those of the first embodiment are denoted by the same reference numerals as those of the first embodiment, and description thereof is omitted because the description can be applied.

  The distributed information devices 5a, 5b, and 5c include a control application unit 101, an object value database (object value DB) 102, a transmission destination list database (transmission destination list DB) 103, a transmission control unit 104a, and a transmission management unit 105. An aggregation unit 106, an aggregation database (aggregation DB) 107, a communication processing unit 108a, a reception control unit 109a, and a substitute device selection unit 120.

  The substitute device selection unit 120 transmits the aggregated object value from the distributed information devices connected to the network 6 according to a predetermined method such as (a) or (b) described below. Select a transmission agent device. Then, the proxy device selection unit 120 outputs proxy device information indicating the selected distributed information device to the communication processing unit 108a. The communication processing unit 108 a sends, to the network 6, a packet in which header information is added to the aggregate object value input from the aggregation unit 106 to the distributed information device indicated by the proxy device information input from the proxy device selection unit 120.

  (A) For each of the distributed information devices to which the own device transmits the object value of the object number “1” (a pair of the object number and the object value), the own device transmits the object number “1” from the distributed information device. A statistical value of the number of times of reception of the object value (corresponding to the number of times of passage through the gate provided with the electric lock controlled by the shared information device) is taken. Then, the processing load of the distributed information device is estimated based on the statistical result, and the distributed information device estimated to have the lowest processing load is selected as the transmission proxy device.

  (B) An area configuration for performing anti-passback control (information on all gates that may pass next to a certain gate, etc.) is retained. Then, from the contents of the object number “1” in the object value database 102, the number of people who can pass the gate next is calculated for each gate. Then, based on the calculation result, the processing load of the other distributed information device is estimated, and the distributed information device estimated to have the lowest processing load is selected as the transmission proxy device.

The transmission control unit 104a, the communication processing unit 108a, and the reception control unit 109a operate as a transmission proxy device in addition to the processing of the transmission control unit 104, the communication processing unit 108, and the reception control unit 109 and the above-described processing. The following processing is executed.
The communication processing unit 108a receives a packet including the aggregate object value. The reception control unit 109a decomposes the aggregate object value input from the communication processing unit 108a into an aggregate object value (a pair of an object number, an object value, and a destination address group). The reception control unit 109a sequentially outputs the aggregation object value to the transmission control unit 104a, and the transmission control unit 104a outputs the aggregation object value to the communication processing unit 108a. Based on the input contents, the communication processing unit 108a sends, to the network 6, a packet in which header information is added to the pair of the object number and the object value to the distributed information device of each destination address that constitutes the destination address group. Send it out.

<Operation flow of distributed information device>
The operation flow of the distributed information devices 5a, 5b, and 5c in FIG. 11 will be described with reference to FIG. FIG. 12 is a flowchart showing an operation flow of the distributed information devices 5a, 5b, and 5c in FIG.
When the communication processing unit 108a receives a packet addressed to itself from the network 6 (step S301: YES), the distributed information device executes a reception process (FIG. 13) (step S302). If not received (step S301: NO), the process of step S303 is performed.

The transmission management unit 105 monitors the change frequency of the object value and determines whether the change frequency of the object value is equal to or higher than a predetermined threshold (step S303).
If it is determined in the determination process of step S303 that the change frequency is less than the threshold (step S303: NO), the aggregation unit 106 determines whether the aggregation flag is on (step S304).

  If it is determined in step S304 that the aggregation flag is on (step S304: YES), the substitute device selection unit 120 transmits the aggregate object value from among the distributed information devices connected to the network 6. The distributed information device (transmission proxy device) is selected (step S305). The aggregation unit 106 aggregates the aggregation object values stored in the aggregation database 107 into one piece of information, and outputs the aggregated object value created by aggregation to the communication processing unit 108a (step S306). Then, the communication processing unit 108a sends a packet with header information added to the aggregate object value to the distributed information device selected in step S305 (step S307), and the aggregation unit 106 sets the aggregation flag to OFF ( Step S308).

If it is determined in step S304 that the aggregation flag is OFF (step S104: NO), substantially the same processing as steps S108 to S110 described in FIG. 6 is performed (steps S309 to S311). .
If it is determined in step S303 that the change frequency is greater than or equal to the threshold (step S303: YES), substantially the same processing as steps S111 to S112 described in FIG. 6 is performed (steps S312 to S313). ).

The aggregation unit 106 determines whether the specified time has elapsed (step S314).
If it is determined in step S314 that the specified time has not elapsed (step S313: NO), substantially the same processing as steps S114 to S116 described in FIG. 6 is performed (steps S315 to S317). ).
If it is determined in the determination process in step S314 that the specified time has elapsed (step S314: YES), the substitute device selection unit 120 transmits the aggregated object value from among the distributed information devices connected to the network 6. The previous distributed information device (transmission proxy device) is selected (step S318). The aggregation unit 106 aggregates the aggregation object values stored in the aggregation database 107 into one piece of information, and outputs the aggregated object value created by aggregation to the communication processing unit 108a (step S319). Then, the communication processing unit 108a sends a packet with header information added to the aggregated object value to the distributed information device selected in step S318 (step S320).

<Operation Flow of Reception Processing in FIG. 12>
The operation flow of the reception process in FIG. 12 will be described with reference to FIG. FIG. 13 is a flowchart showing an operation flow of the reception process of FIG.
The reception control unit 109a determines whether the information in the packet received by the communication processing unit 108a is an object value (step S331).

If it is determined in the determination process of step S331 that the information in the packet is an object value (step S331: YES), the reception control unit 109a stores the object value database 102 based on the object number and the object value in the packet. The stored contents are updated (step S332), and the process returns to FIG.
If it is determined in the determination process in step S331 that the information in the packet is not an object value (step S331: NO), it is determined whether the information in the packet is an aggregate object value (step S333). If the information in the packet is not the aggregate object value (step S333: NO), the process returns to FIG.

If it is determined in the determination process in step S333 that the information in the packet is an aggregate object value (step S333: YES), the reception control unit 109a converts the aggregate object value in the packet into an aggregate object value (object number and object value). And a destination address group) (step S334).
For each of the aggregation object values, the reception control unit 109a updates the stored contents of the object value database 102 based on the object number and the object value if there is a transmission destination address that matches the self address in the transmission destination address group. (Step S335).

  If there is a transmission destination address that does not match the own address in the transmission destination address group for each aggregation object value, the transmission control unit 104a sets the object number, the object value, and the transmission destination address that does not match the own address. To 108a. Then, the communication processing unit 108a sends a packet in which header information is added to the pair of the input object number and the object value to the distributed information device of each input destination address (step S336). And it returns to FIG.

In the following, since the operation sequence when the change frequency of the object value is less than the predetermined threshold is substantially the same as the operation sequence of FIG. 8, only the operation sequence when the change frequency of the object value is greater than or equal to the predetermined threshold is shown. explain.
<Distributed Information System Operation Sequence: Aggregating Information and Sending via Transmission Agent>
The operation sequence of the distributed information system in FIG. 10 will be described with reference to FIG. FIG. 14 is a diagram showing an operation sequence of the distributed information system of FIG. However, in FIG. 14, the distributed information device in which the object value has been changed aggregates the changed object value, and the aggregated object value is transmitted to the distributed information device selected as the transmission agent device, and is selected as the transmission agent device. This is a case where each distributed object information is transmitted to other distributed information devices.

The distributed information device that has been changed with the object is the distributed information device 5a, the distributed information device that receives the changed object value is the distributed information device 5b, and the distributed information device that is selected as the transmission proxy device is the distributed information device. 5c.
The transmission management unit 105 of the shared information device 5a monitors the change frequency of the object value and determines that the change frequency is equal to or higher than the threshold (step S351).

When there is a change in the object value, the transmission proxy device 5a performs substantially the same processing as steps S252 to S256 described in FIG. 9 (steps S352 to S356).
When the aggregation unit 106 determines that the specified time has elapsed (step S357), the substitute device selection unit 120 transmits the aggregated object value to which the aggregated object value is transmitted from among the distributed information devices connected to the network 6 ( A transmission proxy device) is selected (step S358). Here, the distributed information device 5c is selected as the transmission proxy device. The aggregation unit 106 aggregates the aggregation object values stored in the aggregation database 107 into one piece of information, and creates an aggregate object value (step S359). Then, the aggregation unit 106 outputs the aggregated object value to the communication processing unit 108a (step S360), and the communication processing unit 108a sends a header to the aggregated object value to the distributed information device 5c selected as the transmission proxy device in step S358. A packet with information added is sent (step S361).

  The communication processing unit 108a of the shared information device 5c receives the packet addressed to itself, and outputs the aggregated object value in the received packet to the reception control unit 109a (step S362). Since the information in the packet is an aggregate object value, the reception control unit 109a divides the aggregate object value into an aggregate object value (a pair of an object number, an object value, and a destination address group) (step S363). For each aggregation object value, if there is a destination address that matches its own address in the destination address group, the reception control unit 109a stores the contents stored in the object value database 102 based on the object number / object value pair. Update (not shown in FIG. 14). Then, for each aggregation object value, if there is a destination address other than the own address in the destination address group, the reception control unit 109a sends the object number, the object value, and the destination address other than the own address to the transmission control unit 104a. (Step S364). The transmission control unit 104a outputs the input content input from the reception control unit 109a to the communication processing unit 108a (step S365).

The communication processing unit 108a sends a packet in which header information is added to the pair of the input object number and object value to the distributed information device of each input destination address (step S366).
The shared information device 5b performs substantially the same processing as Step S266 to Step S267 described in FIG. 9 (Step S367 to Step S368). Note that the processing from step S367 to step S368 is performed a plurality of times when there are a plurality of object values transmitted from the distributed information device 5c serving as the transmission proxy device to the distributed information device 5b.

  In this embodiment, for example, if a distributed information device that is assumed to have a low processing load is selected as a transmission proxy device, the distributed information device can simultaneously serve as a transmission proxy device even if the distributed information device is not high-performance. Is considered possible. Therefore, it is not necessary to separately provide a transmission proxy device, and it is not necessary to use a high-performance device as the distributed information device, so that an increase in the cost of the entire system can be suppressed.

<< Third Embodiment >>
The third embodiment of the present invention will be described below with reference to the drawings.
As in the first embodiment, the distributed information system according to the present embodiment includes a plurality of distributed information devices and transmission proxy devices connected to the network.
<Functional configuration of distributed information device>
The functional configuration of the distributed information devices 10a, 10b, and 10c of the present embodiment will be described with reference to FIG. FIG. 15 is a functional configuration diagram of the distributed information devices 10a, 10b, and 10c according to the present embodiment. However, components having substantially the same functions as those of the first embodiment are denoted by the same reference numerals as those of the first embodiment, and description thereof is omitted because the description can be applied.

The distributed information devices 10a, 10b, and 10c include a control application unit 101, an object value database (object value DB) 102, a transmission destination group list database (transmission destination group list DB) 103b, a transmission control unit 104b, and communication processing. Unit 108b and reception control unit 109.
The destination list database 103 stores, for each object number, a destination group indicating a group to which a distributed information device other than the own device on which an application using the object value of the object number is operating belongs. As shown in FIG.

In the example of FIG. 16, the transmission destination group to which the distributed device information of the transmission destination of the object value related to the corresponding object number belongs to “transmission destination group (1)” and “transmission destination group (2)” in advance. Yes.
The object value changed from the control application unit 101 and the object number corresponding to the object value are input to the transmission control unit 104b. The transmission control unit 104b inquires the stored contents of the transmission destination group list database 103b and specifies all transmission destination groups (hereinafter referred to as transmission destination group groups) associated with the input object numbers. The transmission control unit 104b outputs the input object number and object value and the specified transmission destination group group to the communication processing unit 108b.

  The communication processing unit 108b receives the object number, the object value, and the destination group group from the transmission control unit 104b, and the communication processing unit 108b transmits the object number, the object value, and the transmission to the transmission proxy device 20 described in FIG. A packet with header information added to the pair with the destination group is sent. The distributed information devices 10a, 10b, and 10c store the IP address of the transmission proxy device 20 in a memory (not shown) in advance.

The communication processing unit 108 b detects a packet addressed to the own device from packets transmitted through the network 3, and outputs information in the packet addressed to the own device to the reception control unit 109.
<Functional configuration of transmission agent device>
A functional configuration of the transmission proxy device 20 according to the present embodiment will be described with reference to FIG. FIG. 17 is a functional configuration diagram of the transmission proxy device 20 according to the present embodiment.

The transmission proxy device 20 includes a reception control unit 201b, a transmission control unit 202b, a communication processing unit 203b, and a transmission destination expansion database (transmission expansion DB) 210.
The transmission destination development database 210 stores the transmission destination address of each distributed information device belonging to the transmission destination group for each transmission destination group, and an example thereof is shown in FIG.
In the example of FIG. 18, the transmission destination addresses of the distributed information devices belonging to the corresponding transmission destination group are stored in advance in “transmission destination address (1)”, “transmission destination address (2)”, and “transmission destination address (3)”. It is registered. A pair of transmission destination addresses stored in association with the transmission destination group corresponds to expanded distributed device information indicating the distributed information device belonging to the transmission destination group.

The reception control unit 201b outputs a pair of the object number, the object value, and the transmission destination group group input from the communication processing unit 203b to the transmission control unit 202b.
The transmission control unit 202b inquires the storage contents of the transmission destination expansion database 210 for each transmission destination group constituting the transmission destination group group input from the reception control unit 201b, and transmits the transmission destination associated with the transmission destination group. Identify the address. Then, the transmission control unit 202b outputs the object number and the object value input from the reception control unit 201b and the specified transmission destination address to the communication processing unit 203b. Here, the transmission destination addresses output to the communication processing unit 203b are all transmission destination addresses specified for all transmission destination groups constituting the transmission destination group group.

The communication processing unit 203b detects a packet addressed to itself from among packets transmitted through the network, and outputs a pair of an object number, an object value, and a destination group group included in the packet addressed to the own device to the reception control unit 201b. To do.
The communication processing unit 203b receives the object number, the object value, and the transmission destination address from the transmission control unit 202b. The communication processing unit 203b sends a packet in which header information is added to a pair of an object number and an object value to the distributed information device having each input destination address.

<Operation flow of distributed information device>
The operation flow of the distributed information devices 10a, 10b, and 10c in FIG. 15 will be described with reference to FIG. FIG. 19 is a flowchart showing an operation flow of the distributed information devices 10a, 10b, and 10c of FIG.
When the communication processing unit 108b receives a packet including an object value addressed to itself from the network (step S401: YES), the reception control unit 109 stores the object value database 102 based on the object number and the object value in the packet. The stored contents are updated (step S402). If not received (step S401: NO), the process of step S403 is performed.

  If there is a change in the object value (step S403), the distributed information device updates the stored contents of the object value database 102 in its own device based on the changed object value and the object number corresponding to the object value. . The transmission control unit 104b inquires the storage contents of the transmission destination group list database 103b and specifies all transmission destination groups (transmission destination group groups) associated with the object number corresponding to the changed object value ( Step S404). The transmission control unit 104b outputs the object number, the object value, and the specified transmission destination group group to the communication processing unit 108b. Then, the communication processing unit 108b sends a packet in which header information is added to the pair of the input object number, object value, and destination group to the transmission proxy device 20 (step S405).

<Operation flow of transmission agent device>
The operation flow of the transmission proxy device 20 in FIG. 17 will be described with reference to FIG. FIG. 20 is a flowchart showing an operation flow of the transmission proxy device 20 of FIG.
When the communication processing unit 203b receives a packet including the object value addressed to itself from the network 3 (step S431: YES), the reception control unit 201b transmits the information (object number, object value, and destination group group) in the packet. It outputs to the control part 202b. The transmission control unit 202b inquires the storage contents of the transmission destination expansion database for each transmission destination group constituting the transmission destination group group, and specifies the transmission destination address associated with the transmission destination group (step S432).

The transmission control 202b outputs the object number, the object value, and the specified transmission destination address to the communication processing unit 203b. The communication processing unit 203b sends a packet in which header information is added to a pair of an object number and an object value to the distributed information device of each transmission destination address (step S433).
<Operation sequence of distributed information system>
An operation sequence of the distributed information system according to the present embodiment will be described with reference to FIG. FIG. 21 is a diagram showing an operation sequence of the distributed information system according to the present embodiment.

The shared information device 10a is a shared information device that has been changed with an object, and the shared information device 10b is a shared information device that receives the changed object value.
The transmission control unit 104b detects a change in the object value (step S451), inquires the storage contents of the transmission destination group list database 103b, and transmits all the transmissions associated with the object number corresponding to the changed object value. A destination group (destination group group) is specified (step S452). In the distributed information device, the contents stored in the object value database 102 in the own device are updated based on the changed object value and the object number corresponding to the object value. The transmission control unit 104b outputs the object number, the object value, and the specified transmission destination group group to the communication processing unit 108b (step S453).

The communication processing unit 108b sends a packet in which header information is added to the pair of the object number, the object value, and the transmission destination group group to the transmission proxy device 20 (step S454).
The communication processing unit 203b of the transmission proxy device 20 receives the packet addressed to itself, and outputs a pair of the object number, the object value, and the transmission destination group group in the received packet to the reception control unit 201b (step S455). The reception control unit 201b outputs a pair of the object number, the object value, and the transmission destination group group to the transmission control unit 202b (Step S456).

  The transmission control unit 202b inquires the storage contents of the transmission destination expansion database 210 for each transmission destination group constituting the input transmission destination group group, and specifies the transmission destination address associated with the transmission destination group ( Step S457). Then, the transmission control unit 202b outputs the object number, the object value, and the specified transmission destination address to the communication processing unit 203b (step S458). The communication processing unit 203b sends a packet in which header information is added to the pair of the object number and the object value to the distributed information device of each input destination address (step S459).

  The communication processing unit 108b of the shared information device 10b receives the packet including the object value addressed to itself, and outputs the object number / object value pair in the received packet to the reception control unit 109 (step S460). The reception control unit 109 updates the stored content of the object value database 102 based on the input object number and object value (step S461).

According to this, since the distributed information device notifies the transmission proxy device of the distributed information device to which the object value is transmitted by the transmission destination group, the data amount of data that the distributed information device transmits to the transmission proxy device Can be reduced.
<< Fourth Embodiment >>
Hereinafter, a fourth embodiment of the present invention will be described with reference to the drawings.

In the first embodiment, the distributed information device that transmits the changed object value aggregates the changed object value and sends it to the network when the processing load of the own device is large.
In contrast, in the present embodiment, the distributed information device that transmits the changed object value aggregates the object value when the processing load of the shared information device that receives the changed object value is large. And send it to the network.

Note that the distributed information system according to the present embodiment includes a plurality of distributed information devices connected to a network, and there is no transmission agent device.
<Functional configuration of distributed information device>
The functional configuration of the distributed information devices 15a, 15b, and 15c of the present embodiment will be described with reference to FIG. FIG. 22 is a functional configuration diagram of the distributed information devices 15a, 15b, and 15c according to the present embodiment. Constituent elements having substantially the same functions as those of the first embodiment are denoted by the same reference numerals as those of the first embodiment, and description thereof is omitted because the explanation can be applied.

  The distributed information devices 15a, 15b, and 15c include a control application unit 101, an object value database (object value DB) 102, a transmission destination list database (transmission destination list DB) 103, a transmission control unit 104, and a flow for each transmission destination. Database (transmission destination-specific flow DB) 130, transmission management unit 105c, transmission destination-specific aggregation unit 106c, transmission destination-specific aggregation database (transmission destination-specific aggregation DB) 107c, communication processing unit 108c, reception control unit 109c And a flow control unit 135.

  The destination-specific flow database 130 stores the flow information of each distributed information device in association with the destination address for each destination address, that is, for each distributed information device, an example of which is shown in FIG. Here, the flow information is information for indicating whether or not the object values destined for the distributed information device are aggregated, and is information regarding the processing load of the distributed information device.

  In the example of FIG. 23, flow information is stored in association with the transmission destination address. “High load” of the flow information indicates that the processing load of the shared information device having the corresponding transmission destination address is high, and the object values transmitted to the shared information device are aggregated. Further, “low load” in the flow information indicates that the processing load of the shared information device with the corresponding transmission destination address is low, and the object values transmitted to the shared information device are not aggregated.

  The transmission management unit 105c inquires the storage contents of the flow database for each transmission destination 130 for each transmission destination address input from the transmission control unit 104, and identifies the flow information associated with the transmission destination address. The transmission management unit 105c outputs an object number, an object value, and a transmission destination address to each communication processing unit 108c for each transmission destination address whose flow information has a low load. On the other hand, the transmission management unit 105c outputs an object number, an object value, and a transmission destination address to each transmission destination aggregation unit 106c for each transmission destination address with high load flow information.

  The destination-by-destination aggregation unit 106c stores a pair of an object number and an object value in the destination-by-destination aggregation database 107c for each distributed information device based on the input destination address. Then, when a predetermined time elapses in advance, the destination-by-destination aggregating unit 106c sets, for each distributed information device, a pair of an object number and an object value stored for each distributed information device in the aggregation database 107c (for aggregation). Object values) are aggregated into one piece of information, and the aggregated object value created by aggregation is output to the communication processing unit 108c together with the transmission destination address.

The flow control unit 135 monitors the load status of the own device, and when the load of the own device transitions from a low load less than a predetermined threshold to a high load greater than or equal to the predetermined threshold, the flow information (high load) is sent to the communication processing unit 108c. Output. On the other hand, the flow control unit 135 outputs flow information (low load) to the communication processing unit 108c when the load of the own device transitions from a high load to a low load.
In addition to performing substantially the same processing as the communication processing unit 108, the communication processing unit 108c, when flow information is input from the flow control unit 135, transmits the flow information to the network by broadcast.

  The reception control unit 109c uses the object number / object value pair input from the communication processing unit 108c or the aggregate object value obtained by decomposing the aggregate object value input from the communication processing unit 108c. Based on each, the contents stored in the object value database 102 are updated. Further, the reception control unit 109c updates the storage contents of the destination-specific flow database 130 based on the flow information input from the communication processing unit 108c.

<Operation flow of distributed information device>
The operation flow of the distributed information devices 15a, 15b, and 15c in FIG. 22 will be described with reference to FIG. FIG. 24 is a flowchart showing an operation flow of the distributed information devices 15a, 15b and 15c of FIG.
The flow control unit 135 monitors the load of the device itself, and if there is a change in the load status (step S501: YES), the flow control unit 135 displays the flow information (low load) when transitioning from a high load to a low load. ) Is output to the communication processing unit 108c, and the flow information (high load) is output to the communication processing unit 108c when transitioning from a low load to a high load. Then, the communication processing unit 108c transmits the input flow information by broadcasting (step S502).

  If the communication processing unit 108c receives a packet including an object value or an aggregated object value (step S503: YES), the reception control unit 109c is based on the object number and the object value in the packet or aggregated in the packet. The stored contents of the object value database 102 are updated based on each aggregation object value (pair of object number and object value) obtained by decomposing the object value (step S504).

  If the communication processing unit 108c receives a packet including flow information (step S505: YES), the reception control unit 109c displays the stored contents of the destination-specific flow database 130, and the flow information in the packet is flow information (high load). If the flow information corresponding to the transmission destination address of the source shared information device is high load, and if the flow information in the packet is flow information (low load), transmission of the source shared information device The flow information corresponding to the destination address is rewritten to a low load (step S506).

  If the specified time has not elapsed (step S507: NO) and the object value has changed (step S508: YES), the distributed information device uses the changed object value and the object number corresponding to the object value as a basis. The stored contents of the object value database 102 in the own device are updated. The transmission control unit 104 inquires about the storage contents of the transmission destination list database 103 and specifies all transmission destination addresses (transmission destination address group) associated with the object number corresponding to the changed object value (step). S509). The transmission control unit 104 outputs the object number, the object value, and the specified transmission destination address group to the transmission management unit 105c. Then, the transmission management unit 105c inquires the storage contents of the flow database 130 for each transmission destination for each transmission destination address constituting the transmission destination address group, and specifies the flow information associated with the transmission destination address (Step S1). S510).

  If the transmission management unit 105c determines that there is a transmission destination address whose flow information has a high load as a result of specifying the flow information (step S511: YES), the transmission management unit 105c each has a high load on the flow information. For the destination address, the object number, the object value, and the destination address are output to the destination-specific aggregation unit 106c. The destination-by-destination aggregating unit 106c stores a pair of the object number and the object value input based on the input destination address in the destination-by-destination aggregating unit 107c for each distributed information device (step S512).

  If the transmission management unit 105c determines that there is a destination address whose flow information has a low load as a result of specifying the flow information (step S513: YES), the transmission management unit 105c transmits each transmission whose flow information has a low load. For the destination address, the object number, the object value, and the destination address are output to the communication processing unit 108c. The communication processing unit 108c sends a packet in which header information is added to the pair of the input object number and the object value, to the distributed information device of each transmission destination address input from the transmission management unit 105c (step S514). ).

  If the specified time has elapsed (step S507: YES), the destination-by-destination aggregation unit 106c, for each of the distributed information devices, the aggregation object value (object number) stored for each distributed information device in the destination-by-destination aggregation database 107c. Are aggregated into one piece of information to create an aggregate object value (step S515). Then, the transmission destination aggregation unit 106c outputs the transmission destination address and the aggregated object value to the communication processing unit 108c for each distributed information device. The communication processing unit 108c transmits a packet in which header information is added to the aggregated object value to the distributed information device having the input transmission destination address (step S516).

<Operation sequence of distributed information system>
An operation sequence of the distributed information system according to the present embodiment will be described with reference to FIG. FIG. 25 is a diagram showing an operation sequence of the distributed information system according to the present embodiment.
However, in FIG. 25, the shared information device 15a is a shared information device whose object value has been changed, and the shared information device 15b is a shared information device that receives the changed object value. FIG. 15 shows a case where the shared information device 15b has a large processing load, and the shared information device 15a aggregates object values that have changed within a specified time and sends them to the shared information device 15b.

Note that the operation sequence when the processing load of the distributed information device to which the changed object value is transmitted is small is substantially the same as the part excluding step S201 in FIG.
The flow control unit 135 of the shared information device 15b detects that the load status of the own device has transitioned from low load to high load, and outputs flow information (high load) to the communication processing unit 108c (step S551). The processing unit 108c transmits the flow information (high load) by broadcasting (step S552).

  The communication processing unit 108c of the shared information device 15a receives the packet including the flow information (high load), and outputs the flow information (high load) in the received packet to the reception control unit 109c (step S553). The reception control unit 109c rewrites the flow information associated with the transmission destination address of the shared information device 15b to a high load in the flow database for each transmission destination 130 (step S554).

  The transmission control unit 104 of the shared information device 15a detects the change of the object value (step S555), inquires the storage contents of the transmission destination database 103, and associates it with the object number corresponding to the changed object value. All transmission destination addresses (transmission destination address group) are specified (step S556). In the distributed information device, the contents stored in the object value database 102 in the own device are updated based on the changed object value and the object number corresponding to the object value. The transmission control unit 104 outputs the object number, the object value, and the specified transmission destination group group to the transmission management unit 105c (step S557).

The transmission management unit 105c inquires the storage contents of the flow database for each transmission destination 130 for each transmission destination address constituting the transmission destination address group, and identifies the flow information associated with the transmission destination address. In this operation sequence, it is assumed that all flow information has a high load (step S558).
The transmission management unit 105c outputs the object number, the object value, and the transmission destination address to each transmission destination aggregation unit 106c for each transmission destination address for which the flow information has a high load (step S559). Based on the input destination address, the destination-by-destination aggregating unit 106c stores the input object number and object value pair (aggregation object value) in the destination-by-destination aggregating unit 107c for each distributed information device ( Step S560).

Note that the processing from step S555 to step S560 is performed for each of the object values that have been changed before the specified time has elapsed.
When it is determined that the specified time has elapsed by the destination-by-destination aggregating unit 106c (step S561), the destination-by-destination aggregating unit 106c uses the aggregated object value stored for each distributed information device in the destination-by-destination aggregation database 107c. Aggregated object values are created by aggregating them into one piece of information for each device (step S562). Then, the destination-by-destination aggregating unit 106c outputs the aggregated object value and the destination address to the communication processing unit 108c (step S563), and the communication processing unit 108c aggregates the input destination address to the distributed information device. A packet with header information added to the object value is transmitted (step S564).

  The communication processing unit 108c of the shared information device 15b receives the packet including the aggregate object value addressed to itself, and outputs the aggregate object value in the received packet to the reception control unit 109c (step S565). The reception control unit 109c decomposes the aggregated object value into aggregated object values (a pair of object number and object value), and stores the stored contents of the object value database 102 based on each of the pair of object number and object value. Update (step S566).

Note that the processing from step S562 to step S566 is performed for each of the distributed information devices.
According to this, for example, a distributed information device having a large processing load at the present time can reduce the number of times object data is received, and the processing load related to communication of the distributed information device on the object data receiving side can be reduced.

In addition, since the processing load of the distributed information device that receives the changed object value is large, the occurrence of a situation in which reception of the packet sent to the own device is refused to receive the object value is avoided. be able to.
<< Fifth Embodiment >>
Hereinafter, a fifth embodiment of the present invention will be described with reference to the drawings.

The first embodiment aims to reduce the communication load of the distributed information device on the side that supplies the changed object value, whereas this embodiment distributes the distributed information on the side to which the object value is supplied. The purpose is to reduce the communication load of the equipment.
<System configuration>
A system configuration of the distributed information system according to the present embodiment will be described with reference to FIG. FIG. 26 is a system configuration diagram of the distributed information system according to the present embodiment.

The distributed information system includes a plurality of distributed information devices 51 a, 51 b, 51 c,... And a reception proxy device 52 connected to the network 53.
When an opportunity to change the object value occurs in any one of the distributed information devices, the one distributed information device (sender device) sends the object value to the reception proxy device 52 when the object value is changed. A packet with header information added to a pair with distributed device information is sent to the network 53. The receiving proxy device 52 aggregates the object values received within a predetermined period for each distributed information device based on the distributed device information, and adds a packet in which header information is added to the information aggregated to the distributed information device (aggregated object value). Send to network 53. The destination device receives the packet, expands the aggregate object value in the received packet, and internally holds the changed object value.

<Functional configuration of distributed information device>
The functional configuration of the distributed information devices 51a, 51b, and 51c in FIG. 26 will be described with reference to FIG. FIG. 27 is a functional block diagram of the distributed information devices 51a, 51b, 51c of FIG. However, components having substantially the same functions as those of the first embodiment are denoted by the same reference numerals as those of the first embodiment, and description thereof is omitted because the description can be applied.

The distributed information devices 51a, 51b, and 51c include a control application unit 101, an object value database (object value DB) 102, a transmission destination list database (transmission destination list DB) 103, a transmission control unit 104d, and a transmission management unit 105. And an aggregation unit 106, an aggregation database (aggregation DB) 107, a communication processing unit 108d, and a reception control unit 109d.
The transmission control unit 104d receives the changed object value and the object number corresponding to the object value from the control application unit 101. The transmission control unit 104d inquires the storage contents of the transmission destination list database 103 and specifies all transmission destination addresses (transmission destination address group) associated with the input object number. The transmission control unit 104d outputs the input object number and object value and the specified transmission destination address group to the communication processing unit 108d.

  The communication processing unit 108d receives the object number, the object value, and the destination address group from the transmission control unit 104d, and the communication processing unit 108d sends the object number, the object value, and the destination address group to the reception proxy device 52. A packet with header information added to the pair is sent to the network 53. The distributed information devices 51a, 51b, 51c store the IP address of the reception proxy device 52 in a memory (not shown) in advance.

The communication processing unit 108 b detects a packet addressed to the own device from packets transmitted through the network 3, and outputs information in the packet addressed to the own device to the reception control unit 109.
Information in the packet is input from the communication processing unit 108 to the reception control unit 109d, and the reception control unit 109d rewrites the stored contents of the object value database 102 based on the input information (a pair of an object number and an object value). .

<Functional configuration of receiving device>
The functional configuration of the reception proxy device 52 in FIG. 26 will be described with reference to FIG. FIG. 28 is a functional configuration diagram of the reception proxy device 52 of FIG.
The reception proxy device 52 includes a reception control unit 201d, a transmission control unit 202d, a communication processing unit 203d, and a transmission destination database (transmission destination DB) 250.

The destination database 250 stores a pair of an object number and an object value in association with a destination address for each destination address, that is, for each distributed information device.
A pair of an object number, an object value, and a destination address group is input from the communication control unit 203 to the reception control unit 201d. The reception control unit 201d stores a pair of an object number and an object value in the transmission destination database 250 for each distributed information device based on each transmission destination address constituting the transmission destination address group.

When the specified time has elapsed, the transmission control unit 202d sets, for each distributed information device, one object number / object value pair (aggregation object value) stored in the transmission destination database 250 for each distributed information device. The information is aggregated into information, and the aggregated object value and destination address created by the aggregation are output to the communication processing unit 203d.
The communication processing unit 203d detects a packet addressed to the own device from packets transmitted through the network 53, and sends a pair of an object number, an object value, and a destination address group included in the packet addressed to the own device to the reception control unit 201d. Output.

The communication processing unit 203d receives the aggregated object value and the transmission destination address from the transmission control unit 202d, and the communication processing unit 203d transmits a packet in which header information is added to the aggregated object value to the distributed information device at the transmission destination address on the network 53. To send.
<Operation flow of distributed information device>
The operation flow of the distributed information devices 51a, 51b, 51c in FIG. 27 will be described with reference to FIG. FIG. 29 is a flowchart showing an operation flow of the distributed information devices 51a, 51b, 51c of FIG.

  When the communication processing unit 108d receives a packet including the aggregate object value addressed to itself from the network 53 (step S601: YES), the reception control unit 109d uses the aggregate object value in the packet received by the communication processing unit 108d for aggregation. The data is decomposed into object values (a pair of an object number and an object value), and the storage content of the object value database 102 is updated based on each of the pair of the object number and the object value (step S602). If not received (step S602: NO), the process of step S603 is performed.

The transmission control unit 104d determines whether the object value has been changed (step S603). If there is no change in the object value (step S603: NO), the process of step S601 is performed.
If there is a change in the object value (step S603: YES), the distributed information device updates the contents stored in the object value database 102 in its own device based on the changed object value and the object number corresponding to the object value. Done. The transmission control unit 104d inquires the storage contents of the transmission destination list database 103, and specifies all transmission destination addresses (transmission destination address group) associated with the object number corresponding to the changed object value (step S1). S604). The transmission control unit 104d outputs the object number, the object value, and the specified destination address group to the communication processing unit 108d. Then, the communication processing unit 108d sends a packet in which the header information is added to the pair of the object number, the object value, and the destination address group to the reception proxy device 52 (step S605).

<Operation flow of receiving device>
The operation flow of the reception proxy device 52 in FIG. 28 will be described with reference to FIG. FIG. 30 is a flowchart showing an operation flow of the reception proxy device 52 of FIG.
When the communication processing unit 203d receives a packet including the object value addressed to the own device from the network 53 (step S631: YES), the reception control unit 201d is based on each transmission destination address constituting the transmission destination address group in the packet. A pair of the object number and the object value in the packet is stored in the transmission destination database 250 for each distributed information device (step S632).

If the packet has not been received (step S631: NO), the transmission control unit 202d determines whether the specified time has elapsed (step S633). If the specified time has not elapsed (step S633: NO), step S631 Is performed.
If the specified time has elapsed (step S633: YES), the transmission control unit 202d sets, for each shared information device, a pair of an object number and an object value stored in the destination database 250 for each shared information device. Are aggregated into one piece of information to create an aggregate object value (step S634). The transmission control unit 202d outputs the aggregated object value aggregated for each distributed information device and the transmission destination address of the corresponding distributed information device to the communication processing unit 203d. Then, the communication processing unit 203d transmits, for each shared information device, a packet in which header information is added to the aggregated object value input to the distributed information device having the input destination address (step S635).

<Operation sequence of distributed information system>
The operation sequence of the distributed information system in FIG. 26 will be described with reference to FIG. FIG. 31 is a diagram showing an operation sequence of the distributed information system of FIG.
When the change of the object value occurs in the shared information device B (step S651), the shared information device B inquires the storage contents of the transmission destination list database 102 and corresponds to the object number corresponding to the changed object value. All transmission destination addresses (transmission destination address group) are specified (step S652). The shared information device B sends a packet in which header information is added to the pair of the object number, the object value, and the specified destination address group to the reception proxy device 52 (step S653). In the distributed information device B, the stored contents of the object value database 102 in the own device are updated based on the changed object value and the object number corresponding to the object value.

  The communication processing unit 203d of the reception proxy device 52 receives the packet addressed to itself, and outputs a pair of the object number, the object value, and the destination address group in the received packet to the reception control unit 201d (step 654). The reception control unit 201d stores the input object number / object value pair in the transmission destination database 250 for each distributed information device, based on the transmission destination addresses constituting the input transmission destination address group ( Step S655).

When the change of the object value occurs in the distributed information device A, substantially the same processing as Step S651 to Step S655 is performed (Step S656 to Step S660).
When the specified time elapses (step S661), the transmission control unit 202d of the reception proxy device 52 sets a pair of the object number and the object value stored for each shared information device in the destination database 250 for each shared information device. Are aggregated into one piece of information to create an aggregate object value (step S662).

  For the distributed information device D, the transmission control unit 202d outputs the aggregated information (aggregated object value) and the transmission destination address of the distributed information device D to the communication processing unit 203d (step S663). Then, the communication processing unit 203d sends a packet in which header information is added to the aggregated object value to the distributed information device D (step S664). The distributed information device D receives the packet addressed to itself, expands the aggregate object value in the packet into a pair of object number and object value, and stores the object value database 102 based on the object number and the object value. The stored contents are updated (step S665).

The shared information device C is also subjected to substantially the same processing as steps S663 to S665 (steps S666 to S668).
According to this, since the distributed information device receives the changed object value as an aggregated aggregated object value, the processing load for TCP / IP communication of the distributed information device on the side receiving the changed object value is reduced. Can be reduced. For this reason, it is not necessary to use a high-performance distributed information device. As a result, it is necessary to separately provide a dedicated device for the reception proxy device 52, but an increase in the cost of the entire system can be suppressed.

<Supplement>
The present invention is not limited to the embodiment described above, and may be as follows, for example.
(1) In the first embodiment, the distributed information device sends the aggregated object value created by aggregating the changed object values to the transmission agent device when a predetermined time has passed to the transmission agent device. To send. However, the present invention is not limited to this. For example, when the number of changes in the object value reaches a predetermined number, the aggregated object value created by aggregating the changed object values is sent to the transmission agent device. May be transmitted. As described above, the timing for sending the aggregated object value created by aggregating the changed object values to the transmission proxy device is not limited.

In the second embodiment, the timing for sending the aggregate object value is not limited to when the specified time has elapsed.
(2) In the fourth embodiment, as another means for enabling one distributed information device to identify the load status of another distributed information device connected to the network, the other distributed information device has its own device load. Information on the situation is sent to the network, and one distributed information device receives this information and holds it internally. However, the present invention is not limited to this, and one shared information device can generate an object value generated by another shared information device based on a packet including an object value or an aggregated object value sent from another shared information device. The number of changes may be specified to specify the load status of other distributed information devices.

  (3) In the first embodiment and the second embodiment, regardless of the processing load of the distributed information device, if there is a change in the object value, the object always changed directly to another distributed information device A value may be transmitted. Further, regardless of the processing load of the distributed information device, the object values that have been changed within the specified time may be aggregated, and the aggregated object value created by aggregation may be transmitted to the transmission proxy device.

(4) In the fourth embodiment, regardless of the processing load on the side that receives the changed object value, the object values that have changed within the specified time are aggregated for each distributed information device and created by aggregation The aggregated object value may be transmitted for each distributed information device.
(5) A program describing a processing procedure equivalent to the processing described in the above embodiment may be stored in a memory and processed using a CPU (Central Processing Unit) or the like. The program may be recorded on a recording medium such as a CD-ROM that can be read by a computer or the like.

The system block diagram of the distributed information system of 1st Embodiment. The function block diagram of the distributed information apparatus of FIG. The figure which shows an example of the memory content of the object value database of FIG. The figure which shows an example of the memory content of the transmission destination list database of FIG. The function block diagram of the transmission agency apparatus of FIG. The flowchart which shows the operation | movement flow of the distributed information apparatus of FIG. The flowchart which shows the operation | movement flow of the transmission agency apparatus of FIG. The figure which shows the operation | movement sequence of the distributed information system of FIG. The figure which shows the operation | movement sequence of the distributed information system of FIG. The system block diagram of the distributed sharing system of 2nd Embodiment. FIG. 11 is a functional configuration diagram of the distributed information device in FIG. 10. 12 is a flowchart showing an operation flow of the distributed information device of FIG. 11. The flowchart which shows the operation | movement flow of the reception process of FIG. The figure which shows the operation | movement sequence of the distributed information system of FIG. The function block diagram of the distributed information apparatus of 3rd Embodiment. The figure which shows an example of the memory content of the transmission destination group list database of FIG. The function block diagram of the transmission agent apparatus of 3rd Embodiment. The figure which shows an example of the memory content of the transmission destination expansion | deployment database of FIG. The flowchart which shows the operation | movement flow of the distributed information apparatus of FIG. The flowchart which shows the operation | movement flow of the transmission agency apparatus of FIG. The figure which shows the operation | movement sequence of the distributed information system of 3rd Embodiment. The function block diagram of the distributed information apparatus of 4th Embodiment. The figure which shows an example of the memory content of the flow database classified by transmission destination of FIG. The flowchart which shows the operation | movement flow of the distributed information apparatus of FIG. The figure which shows the operation | movement sequence of the distributed information system of 4th Embodiment. It is a system configuration figure of the distributed information system of a 5th embodiment. FIG. 27 is a functional configuration diagram of the distributed information device in FIG. 26. FIG. 27 is a functional configuration diagram of the reception proxy device in FIG. 26. The flowchart which shows the operation | movement flow of the distributed information apparatus of FIG. The flowchart which shows the operation | movement flow of the reception proxy apparatus of FIG. The figure which shows the operation | movement sequence of the distributed information system of FIG.

Explanation of symbols

1a, 1b, 1c Distributed information device 2 Transmission proxy device 3 Network 101 Control application unit 102 Object value database 103 Transmission destination list database 104, 202 Transmission control unit 105 Transmission management unit 106 Aggregation unit 107 Aggregation database 108, 203 Communication processing unit 109 201 Reception control unit

Claims (7)

In a distributed information system that has a plurality of distributed information devices connected to a network and object data that has been changed in one distributed information device is used by an application that is executed in another distributed information device
The distributed information device is:
Data storage means for storing object data used by the application;
Device information storage means for storing distributed device information indicating other distributed information devices that execute applications using object data;
In order to supply the changed object data to the distributed information device indicated by the distributed device information stored in the device information storage means when an opportunity for changing the object data occurs in the own device, Sending means for sending to the network;
Reception processing means for receiving object data changed by another distributed information device via the network, and rewriting the storage content of the data storage means to the object data;
With
The distributed information device further includes a determination unit that determines whether or not the occurrence status of the change of the object data in the own device satisfies a predetermined condition,
The delivery means includes
If it is determined by the determination means that the occurrence status does not satisfy the condition, the object data is sent to the distributed information device indicated by the distributed device information when the object data is changed,
When it is determined by the determination means that the occurrence state satisfies the condition, sending of the object data is performed by combining a pair of each changed object data and the distributed device information at a predetermined timing. the aggregate object data obtained have row by sending to the network,
Wherein the predetermined condition is, the change frequency of the object data is equal to or greater than a predetermined threshold value, or, distributed information systems that wherein the change interval of the object data is equal to or less than the predetermined time. The distributed information system further includes a transmission agent device that mediates for supplying object data from the distributed information device to another distributed information device,
The sending means sends the aggregated object data to the transmission agent device,
The transmission agent device receives aggregated object data via the network, and sends each object data included in the received aggregated object data to the distributed information device indicated by the distributed device information paired with the object data to the network. distributed information system according to claim 1, characterized in that it comprises a transmission proxy means for transmitting. The distributed information device is selected by a predetermined method from among the distributed information devices connected to the network, as a transmission agent device that mediates the supply of object data from the own device to another distributed information device Further comprising means,
The sending means sends the aggregated object data to the distributed information device selected by the selecting means,
The distributed information device receives aggregated object data transmitted by another distributed information device via the network, and each piece of object data included in the received aggregated object data has a distributed device information paired with the object data. distributed information system according to claim 1, further comprising a transmission proxy means for sending to the network in the distributed information addressed device shown. The distributed information system further includes a transmission agent device that mediates for supplying object data from the distributed information device to another distributed information device,
The distributed device information is group information indicating a group to which other distributed information devices on which software is executed belong,
The sending means performs sending of the object data by sending a pair of the object data and the group information to the transmission agent device to the network,
The transmission agent device is:
Expanded device information storage means for storing expanded distributed device information indicating the distributed information device belonging to the group information for each group information;
A pair of object data and group information is received via the network, and the object data is associated with the group information and addressed to the distributed device information indicated by the expanded distributed device information stored in the expanded device information storage unit. Transmission agent means for sending to the network;
The distributed information system according to claim 1, further comprising: When the determination unit determines that the occurrence state satisfies the condition , the sending unit sends the object data to the device information storage unit at a predetermined timing. 2. The distributed information system according to claim 1, wherein aggregated object data obtained in a unit of a distributed information device based on stored distributed device information is sent to the network to the distributed information device. The distributed information system further includes a reception agent device that mediates for supplying object data from the distributed information device to another distributed information device,
The sending means sends the object data by sending a pair of the object data and the distributed device information to the receiving proxy device to the network,
The reception proxy device receives a pair of object data and distributed information device via the network, and at a predetermined timing, receives each object data based on the distributed device information of the pair as a distributed information device unit. 2. The distributed information system according to claim 1, further comprising: a reception agent unit that sends the aggregated object data collectively obtained to the network to the corresponding distributed information device. In a communication method that is performed between distributed information devices connected to a network and supplies object data that has been changed in one distributed information device to another distributed information device in which an application that uses the object data is executed.
One distributed information device is
When the trigger for changing the object data occurs in the local device, it is determined whether the occurrence status of the trigger for changing the object data in the local device satisfies a predetermined condition, and the changed object data is stored in the device information storage. In order to supply to other distributed information devices that execute an application that uses the object data indicated by the distributed device information stored in the means, send to the network,
Other distributed information devices
Receiving object data sent by the one distributed information device via the network;
Update the storage contents of the data storage means for storing the object data used by the application based on the received object data ,
The one distributed information device sends the object data to the distributed information device indicated by the distributed device information when the object data is changed, when it is determined that the occurrence status does not satisfy the condition. When it is determined that the occurrence condition satisfies the condition, aggregated object data obtained by combining a pair of each changed object data and the distributed device information is sent to the network at a predetermined timing. To do
The predetermined condition is that the change frequency of the object data is equal to or greater than a predetermined threshold, or the change interval of the object data is equal to or less than a predetermined time .

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