JPH09160855A - Data communication system by computer device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enable a user to execute data communication selecting an optimum communication system at all times without consciousness of it. SOLUTION: Computer devices used by user are respectively provided with application agents 11-1 to 11-3, a general purpose agent 12 and a communication coordinator 14, etc. The application agent 11-1 selects the optimum communication system for communicating data to be an object. The application agent 11-2 transmits the position of a machine that the user logs-in to a home machine and the application agent 11-3 executes the transfer of an electronic mail with the home machine. The communication coordinator 14 monitors connection with the selected network and the general purpose agent 12 selects data corresponding to a priority degree so as to control queues 13-1 to 13-3.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a data communication system using computer devices, which makes it possible to freely select networks having different configurations and characteristics to most efficiently and economically perform communication between computer devices. .

[0002]

2. Description of the Related Art As a communication network as a data communication medium, there are a wide area such as a telephone network and a facsimile network, and a small area such as a LAN (local area network). is there. However, these are connected to each other, and further, it is becoming possible to connect to wide area high speed transmission by an optical fiber or the like. If such multimedia is advanced, the frequency of users performing data communication using not only the home machine that they use fixedly but also a simple portable remote machine increases. Note that the objects of this data communication include sales information, customer information, and electronic mail. Unlike voice communication such as a telephone, this kind of data communication is not so strict in real time, but it is necessary to deal with transfer error very strictly.
That is, in voice communication, a slight transmission delay is allowed in order for the voice of the other party to be transmitted smoothly, but it is sufficient if it is possible to distinguish even if there is some noise. However, in data communication, even if a 1-bit error occurs, important information is lost, and digit data such as an amount of money causes a digit shift. Therefore, conventionally, a predetermined protocol has been set according to the type of network or hardware used to ensure the reliability of data communication.

[0003]

The conventional data communication system as described above has the following problems to be solved. In an environment where networks with different characteristics and capabilities are connected to each other, and wired communication, wireless communication, and other various media can be freely used, in what kind of situation, from what place, what kind of character Whether data communication is required is an important issue. Moreover, depending on the selection of the data communication means, the communication method, the communication time, etc., not only the communication quality but also the cost thereof, etc.
Wide gaps occur at various points. However, it is burdensome for the user to recognize such a difference and the like and to select an appropriate means each time. Moreover, it is impossible to properly deal with the place, the environment, the network, the service, etc. that are newly added one after another. That is, there is a demand for a system that can adopt an appropriate communication method without the user being aware of it.

[0004]

The present invention employs the following structure to solve the above problems. <Structure 1> When an application of a computer device selects one of a plurality of networks having different personalities to perform data communication with the other party, it accepts the communication request of the application and becomes the target of the communication request. An application agent that selects an optimum communication method based on the result of comparing the communication capacity and economic efficiency of at least each of the networks described above,
A communication coordinator that monitors the states of the plurality of networks, connects to any of the networks according to the communication method selected by the application agent, and maintains communication.

<Description> A computer system is a desktop type,
It may have any configuration such as a portable type. Any number of applications may be launched simultaneously on the computing device. The reason why the plurality of networks having different characteristics is used is to include arbitrary networks having different communication speeds, communication costs, operational reliability, stability, and the like. The property of the transmission data includes various conditions such as the amount of data, the type of data, the urgency of the transmission data, and the like. If there is a large amount of data to be transmitted and the urgency is low, the option of using a network with a low communication cost at a low cost time is selected. Also, for transmission data that requires real-timeness and urgency, a high-speed transmission path is selected and transmitted. The nature of the transmitted data is taken into account for such selection. It is for this reason that at least the communication capabilities and economics of each of the networks are compared. Selecting a communication system includes selecting a network and selecting interface hardware such as a protocol or a modem for using the network. This is because the optimum communication method is selected. By providing an application agent and communication coordinator with each of these functions, you can use any computer device,
Optimized data communication is possible at any place by selecting any network from a plurality of networks having completely different characteristics.

<Configuration 2> In Configuration 1, the communication requests of a plurality of application agents are accepted, the communication order of them is determined, the data queue is managed, the data is temporarily stored, and the data is stored in the determined order. It has a general-purpose agent that transfers it to the communication coordinator.

<Explanation> When a plurality of application agents are operated in a computer and each data communication request is issued, the requests may conflict. In this case, the order is adjusted in consideration of the priority and the like to generate a queue. This makes it possible to optimize parallel processing of a plurality of data communication requests. Further, in the case of communication that does not require real-time control, it becomes possible to manage the transmission time.

<Structure 3> The communication coordinator disconnects from the network and communication is interrupted.
When reconnection to the network is performed, the receiver is queried whether the transmission up to the preset synchronization point in the transmission data is completed, the transmission is returned to the latest synchronization point, and communication is restarted. .

<Explanation> When communication is interrupted, generally all the data being transmitted is retransmitted. However, considering the communication cost, it is desirable to avoid resending the already transmitted data. Therefore, a synchronization point is set so that data transmission can be restarted from that portion. The reason for providing the synchronization point is to facilitate the notification of the starting point of the transmission restart.

<Structure 4> The communication coordinator disconnects from the network and communication is interrupted.
If reconnection to the same network is not possible, target the remaining connectable networks and check the nature of the transmission data that was the target of the communication request, and at least the communication capacity and economic efficiency of each network. The optimum network is selected based on the comparison result, and the connection state is maintained.

<Description> When communication using a certain network is disconnected due to a communication failure or the like, it is desired to continue the communication through the remaining sound network without the user's awareness. The communication coordinator therefore performs network reselection and connection processing.

<Structure 5> When a plurality of computer devices connected to the network copy and store the data of the same contents and individually use the data, the contents of the data in different storage locations are stored. When performing information synchronization to update and match each other to the latest version, the application agent shall be based on the characteristics of the transmission data subject to information synchronization and at least the result of comparing the communication capacity and economic efficiency of each network. Then, the information synchronization is executed for each data in the optimum order.

<Explanation> Information synchronization is executed for data that should have the same contents and are stored in different places. In this case, there is also a problem in which information is stored first in which data synchronization. This is because the data in the storage location that is highly used should be updated first. Also, when there are several types of data and each data is stored in several storage locations, it becomes a problem how to synchronize the data first. Also in this case, information with high utilization is selected and information is preferentially synchronized. In this way, information synchronization becomes possible in the optimum order.

<Structure 6> The application agent recognizes the type and position of the logged-in computer device and selects the optimum communication method according to the recognition result.

<Explanation> When the computer device is a wireless terminal, the communication condition changes depending on the logged-in position <place>. The application agent recognizes the communication condition and selects the communication method. Enable efficient and efficient communication.

<Configuration 7> When the home machine receives the electronic mail and the user logs in the remote machine, the application agent of the home machine is
Preliminarily designated e-mail is unconditionally transferred to the remote machine, and other unspecified urgent e-mail sends an incoming communication to the remote machine.

<Explanation> When the home machine knows the position of the remote machine and the like, when an e-mail is received, only the emergency part is selected and transferred or notified without waiting for the inquiry from the remote machine. Communication such as useless inquiry can be omitted.

[0018]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to specific examples. <Specific Example> FIG. 1 is a block diagram of a main part of the system of the present invention. Before giving a specific description of this system, first, a general description of the entire system to which the present invention is applied will be given. FIG. 2 is a schematic diagram showing an example of a system to which the present invention is applied. The schematic diagram in the figure has a configuration in which a LAN (local area network) 2 is connected to a network 1 such as a public network, and a mail server 3 and the like are provided in a connection portion connecting the LAN 2 and the network. A computer device 4 is connected to the LAN 2 as a fixed station of the user. On the other hand, this L
The AN2 is provided with a mobile station capable of wirelessly communicating with the base unit 7 connected to the AN2. This mobile station has a configuration in which the computer device 5 and the PHS 6 are connected. That is, the user can perform various processes by operating the computer device 4 which is a fixed station, and can freely move using the computer device 5 which is a mobile station to perform necessary data communication. ing. It is assumed that, for example, an ISDN (Integrated Service Digital Network) 8 is also connected to the LAN 2 via an ATM (Multiplexing Device) 7.

As shown in this figure, a system in which a user can freely move around to perform data communication is called a mobile computing environment. The quality of the line between the two, communication time restrictions, line disconnection during communication, transparency to multiple communication media, grasping the current position of the user, complementing mobile and fixed stations There are various problems such as data synchronization. If the quality of the line is poor, the reliability of data communication decreases, so that it is necessary to slow down the communication speed and use various protocols for data error correction. In addition, there are cases in which the communication cost differs between a time period when the use of general users is concentrated and a time period when the use is decreased, such as a public network. Further, in the case of wireless communication, the communication is interrupted when the mobile station moves to an incommunicable area. Further, when data communication is performed by connecting networks having different characteristics to each other, transparency to a plurality of communication media becomes a problem. In addition, the most economical and efficient communication method of data communication varies depending on the current position of the user.

In consideration of the above points, the present invention automatically selects an efficient and highly economical communication method without the user being aware of it. For example, even if the line is disconnected during the communication for some reason, the communication is automatically terminated without the user being aware of the communication, the communication is restarted, and necessary data is retransmitted. In addition, coaxial cables, optical fibers, etc. are used for the lines to be used, and other various interfaces and various protocols are adopted, but in this case also, the application in the user or the computer device used by the user may make the difference. Transparency is not necessary to be aware of. The above device ensures such transparency. In addition, when the user uses not only the home machine of the fixed station but also the remote machine of the mobile station, it is convenient for the user to create an environment exactly the same as when the home machine is used. Therefore, transmission / reception of electronic mail, synchronization of various stored data, etc. are automatically and efficiently executed. The present invention also solves this part.

The main part of the system of the present invention shown in FIG. 1 will be described. This system is installed in a computer device such as a home machine or a remote machine used by a user. In the figure, application agent 1
1-1 to 11-3, a general-purpose agent 12, and a communication coordinator 14 are shown, and various networks are connected to the communication coordinator 14. The communication coordinator 14 is connected to each network via a buffer memory group 15.

That is, network A and network B shown in FIG.
The network, C network, and D network are, for example, well-known TCP, W / TCP, PHS, irD.
It is composed of a transport layer such as R. TCP
W / TCP is a wired network such as the Internet or a local area network, PHS is a wireless network such as a mobile phone, and irDA is a network such as an infrared LAN. The system shown in FIG. 1 is
Application agents 11-1 to 11-3, a general-purpose agent 12, and a communication coordinator 14 are provided on top of these various transport layers.
It provides an interface composed of layers to ensure transparency from upper layers to lower layers.

First, the application agent 11
-1 to 11-3 are agents that perform various intelligent processes, and an arbitrary number of agents are provided. As will be described later, this includes a login monitoring agent that monitors the computer device that the user has logged in, a synchronization agent that synchronizes information between multiple computer devices that the user uses, and an emergency message depending on the content of the email. There is a mail agent that controls the transfer of specific mail. Further, as will be described with reference to FIG. 3 and subsequent figures, the optimum communication method is based on the result of comparison between the property of the transmission data that has received the communication request and is the object of the communication request, and the communication capability and economic efficiency of each network. This application agent has the function of selecting.

Next, the general-purpose agent 12 includes queues 13-1 to 13-3 for each of the application agents 11-1 to 11-3, for example. Then, the communication order is determined from the content of the communication request for each data, the data queue is managed, and these are temporarily stored and then transferred to the communication coordinator 14. As a result, as will be described later, even if a network disconnection occurs, the user completes the communication without being aware of it, and the general-purpose agent 12 temporarily saves the apparently completed communication data, Operations such as waiting for disconnection recovery and completing processing are performed. In addition, the priority can be specified according to the content of the data, and an operation that dynamically responds to changes in the priority is performed.

Communication coordinator 14
Is for hiding the transport layer connected to the lower side when viewed from the upper layer and providing a highly transparent interface. The communication coordinator 14 has a function of constantly detecting and recovering whether or not a network disconnection has occurred, and, as will be described later, in response to interruption of data transfer, data at the time of reconnection or the like is connected. Manage the progress of the transmission process. Thus,
Monitor the media such as network, Q for each media
OS (Quality of service)
To manage

<Communication system selection> The communication system selection operation of the application agent will be described with reference to FIG. First, FIG. 3 shows an explanatory diagram of network types.
For example, as shown in this figure, there are various types of networks such as a wired LAN, a wireless LAN, a mobile phone, a PHS, a serial line (RS-232C), infrared rays, and ISDN. These networks have different communication capabilities and economics. For example, in a wired LAN, terminals are always connected to each other, and data can be transferred at high speed and at low cost if there is no competition with other communication. On the other hand, in the wireless LAN, noise is likely to be mixed depending on the communication environment, and it is necessary to frequently perform error correction of data. Also, mobile phones have analog type and PHS
However, the communication cost is higher than the wired public network in any case. Further, the serial line has a low communication speed, and ISDN is capable of high-speed mass data communication, but the communication cost is high. When the user uses only the fixed station computer device 4 as shown in FIG. 2, it is easy to select the communication method because the network or the like to be used is limited in advance, but the mobile station or the like is used. In this case, the communication speed and the communication cost greatly differ depending on the selection of the communication line and the communication method. Therefore, the following selection criteria are set to select the communication method.

FIG. 4 shows a reference explanatory diagram of communication system selection. For example, as shown in this figure, there is a need for selection criteria in accordance with low line quality, communication time restrictions, line disconnection during communication, user position, and the like. That is, regarding the line quality, there is a large difference between analog communication and digital communication,
If there are restrictions on the communication time, for example, either serial transmission or parallel transmission is selected. The communication speeds are different from each other, and the communication method may be selected in consideration of the communication cost. Further, the mobile station has a problem of disconnection of the line during communication, and when the user is moving, it is necessary to selectively switch the communication method according to the position.

FIG. 5 shows a flowchart for selecting a communication method. Steps S1 to S3 shown in this figure
For example, it is assumed that the application agent 11-1 shown in FIG. Steps S4, S
5 shall be implemented by the communication coordinator 14. First, in step S1, when the application agent receives a communication request from an application or the like operated by the user, in step S2 a communication method is selected. The standard is as described in FIGS. 3 and 4. Next, in step S3, the selected communication method is notified to the communication coordinator 14. Then, in step S4, the communication coordinator connects to the selected network. In step S5, the communication coordinator monitors the state of connection and data communication is executed.

<General-purpose Agent> FIG. 6 shows an operational flowchart of the general-purpose agent. In order for the user to operate the computer device without being aware of the nature of the data, selection of the communication network, etc., the general-purpose agent executes the processing shown in this figure. First, step S1
In step S2, when a communication request is received from the user application, the communication order is determined in step S2. That is, various application agents connected to the general-purpose agent 12 shown in FIG. 1 make requests for notification of user position, transmission of electronic mail, transmission of update data for information synchronization, respectively.
Do for 2. The general-purpose agent 12 accepts such a request and temporarily stores it in a queue in consideration of the urgency of the data transfer and the like (step S3). Thus, in step S4, the data is extracted from the queue and transferred to the communication coordinator 14 in step S5.

Therefore, in addition to adjusting the competition of communication requests by each application agent, when the user makes a data transmission request, for example, even if the communication is interrupted midway, the general-purpose agent accepts the data and transmits it. Terminate the process. Then, after that, the general-purpose agent automatically resumes communication and at the same time continues necessary data transmission to end the processing. This allows the network type,
Data communication processing can be performed freely without being bothered by the communication speed of the network and interruption in the middle.

FIG. 7 shows a processing flowchart when communication is interrupted. When the communication ends, the recognition of the interruption and the subsequent restart processing become a problem. The communication coordinator 14 shown in FIG. 1 performs the restart processing at the time of communication interruption as shown in this figure. That is, first, when the communication request is accepted in step S1 and the communication is started in step S2, the communication coordinator appropriately issues a synchronization point insertion request to the other communication coordinator. That is, the synchronization points are inserted into each other at appropriate time intervals or each time a suitable amount of data is transmitted. As a result, the communication coordinators on the transmitting side and the receiving side always insert the synchronization point into the data at appropriate timing. After that, if the communication is interrupted in step S3, the communication is restarted in step S4. Then, when the communication is restarted, in step S5, the communication coordinator on the transmission side inquires the communication coordinator on the reception side about the completion of transmission. This is performed by receiving an inquiry about which sync point has completed the reception of data and a response to the inquiry. Then, in step S6, communication is restarted from the synchronization point. By such a method, it is possible to prevent useless communication caused by transmitting all data again due to communication interruption. Therefore, when using a pay communication network, it is possible to reduce the communication cost, and when transmitting a large amount of data, it is possible to shorten the time until the communication is completed.

<Communication Method Reselection> FIG. 8 shows a communication method reselection operation flowchart. If communication is interrupted,
It is not always possible to restart the communication method used so far. For example, if the user is communicating using a remote machine that is a mobile station, the communication is interrupted, and if the user then moves to another location, the same system communication may not be possible. In this case, the application agent described above again performs the communication system selection operation performed at the start of communication. That is, the process proceeds from step S4 to step S5 in FIG. 8, another new communication method is selected, and then the process proceeds to step S6 to continue the process. That is, another network or communication method is selected to continue communication. By adding these capabilities, reconnection can be done smoothly.

<Recognition of Login Location> In a mobile computing environment, users are expected to use different machines depending on the situation. For example, an office desk machine in the office, a study machine at home,
I often use a palmtop or sub-notebook machine while moving. Therefore, the machine used depends on where the person is. When trying to send an urgent email to the machine the user is currently accessing, it is necessary to identify which machine the user is using to access. In order to perform such a service, a login monitoring agent is provided in one of the application agents shown in FIG. Then, the following operation is performed.

FIG. 9 shows an explanatory diagram of the operation of the home machine. First, it is assumed that the home machine is operating regardless of whether or not the user has logged in the remote machine. When an e-mail arrives at the home machine in step S1, an e-mail transfer request is issued in step S2, if necessary. At this time,
The home machine recognizes the computer device the user has logged in to in step S3, and transfers the electronic mail in step S4.

FIG. 10 shows a flow chart of this login position recognition processing operation. First, step S in this figure
In 1, the user logs in to the remote machine. Then, in step S2, the login monitoring agent of the remote machine notifies the login monitoring agent of the home machine of the type and position of the logged-in machine. In this way, the home machine recognizes the position of the computer device to which the user has logged in. In order to realize such a system, for example, the following system configuration is adopted.

FIG. 11 shows a block diagram of a login position recognition system. As shown in the figure, the home machine 21
Is connected to the remote machine 22 through an arbitrary network or the like. The home machine 21 is provided with a login monitoring agent 23, and the remote machine 22 is also provided with a similar login monitoring agent 24.
Further, a mail server 25 for sending and receiving electronic mail is connected to the home machine 21, and the remote machine 22
Has a mailbox 26 for accepting emails
Is provided. When the system having such a configuration is adopted, when the user logs in to the remote machine 22, the login monitoring agent 24 notifies the home machine 21 of the type, position, etc. of the machine logged in by the user at that timing. Login monitoring agent 2
3 recognizes this, memorize | stores it, and utilizes it at the time of transmission / reception of an electronic mail etc.

When the remote machine is a portable terminal, the user always moves. In this case, it is necessary to inform the home machine 21 of the position of the user as often as possible, and the home machine 21 needs to select a network according to the position of the user. Therefore, the following position recognition method is selected at any time. FIG. 12 shows a type explanatory diagram of the position recognition method. The login monitoring agent 23 of the home machine shown in FIG.
Recognize the location and type of the remote machine by communicating with the remote machine when logging in and logging out. In addition to this, when data transmission between the remote machine and the home machine is executed, the position of the remote machine or the like is accepted by communication accompanying this. Further, according to the operating environment, communication contents, and other conditions, the position that can be calculated by itself is predicted uniquely using a predetermined knowledge base. With such a method, the position of the remote machine can be recognized. Further, when the remote machine is moving according to a fixed schedule, the schedule is stored as a database and the default value thereof is incorporated so that the position of the home machine can be recognized moment by moment.

<Transmission / Reception of E-mail> In order for the user to use the home machine and the remote machine in the same environment, the transfer of e-mail or the like is important. However, if the remote machine frequently inquires of the home machine about the mail arrival status, the communication cost increases. FIG. 13 shows an explanatory diagram of an e-mail selective transfer operation. FIG. 1A shows a procedure of a mail arrival confirmation process which has been generally adopted conventionally. That is, as shown in the figure, when the remote machine 22 notifies the home machine 21 that an incoming mail has been confirmed, the home machine 21 each time sends a non-arrival response or transfers an incoming mail. Therefore, a useless communication cost is paid to confirm the incoming mail. On the other hand, in the present invention, such a wasteful communication is avoided by the mail agent of the home machine performing the knowledge processing. That is, as shown in (b) of the figure, information for identifying whether or not automatic transfer should be performed beforehand and information for identifying whether or not it is urgent are added to the electronic mail. Then, when an electronic mail designated for automatic transfer is received, the electronic mail is automatically transferred to the remote machine without receiving an inquiry from the remote machine. On the other hand, when an unspecified emergency e-mail is received, the home machine notifies the remote machine of the arrival of the e-mail and receives a response as to whether or not the e-mail should be transferred. Other e-mails are stored in the home machine, and the user operates the home machine to view the contents, or makes a transfer request from the remote machine as needed. As a result, unnecessary communication such as confirmation of incoming mail can be omitted.

<Information Synchronizing Process> When the home machine and the remote machine are operated in the same environment, it is necessary to synchronize the contents of information stored as data in each machine. This is called information synchronization, but when one is updated, the other is also updated. The timing depends on the urgency of the data content. This information synchronization is therefore called loose synchronization, but this information synchronization is similar to the processing such as the notification of the position of the remote machine shown in FIG.

FIG. 14 shows a reference explanatory diagram of a method of synchronizing information. That is, a method of synchronizing the contents each time information is changed, a method of periodically synchronizing the information, a method of synchronizing with login and logout, a method of synchronizing with other data transmission as a trigger, and a user positively There is a method of synchronizing with a different instruction as a trigger, a method of synchronizing frequently when the frequency of information change is high, and a method of synchronizing after a relatively long time when the frequency of change of information is low. In either case, the user needs to be aware of whether the communication charge, that is, the communication cost is low, whether advanced processing for control is not required, whether the user's effort is small, and whether the accuracy of information synchronization is high. The point is whether or not it is necessary to do it. Information synchronization is performed in consideration of these conditions.

FIG. 15 shows an information synchronization processing flowchart. That is, as shown in step S1 of FIG. 15, when the data is updated, the property of the data is determined in step S2, and the communication capability and economic efficiency of the network are determined in step S3. Then, in step S4, the time and timing of information synchronization and the communication method for information synchronization are determined in consideration of the criteria shown in FIG. When this is determined, it is determined in step S5 whether or not to start the process immediately, and if the process does not have to be started immediately, it is stored in the general-purpose agent 12 or the like shown in FIG. On the other hand, if the process is to be performed immediately, the process proceeds to step S7, and the information synchronization process is executed. As described above, the information synchronization can be optimized.

[Brief description of the drawings]

FIG. 1 is a block diagram of a main part of a system according to the present invention.

FIG. 2 is a schematic diagram of a system to which the present invention is applied.

FIG. 3 is an explanatory diagram of types of networks.

FIG. 4 is an explanatory diagram of criteria for selecting a communication method.

FIG. 5 is a flowchart of a communication system selection operation.

FIG. 6 is an operation flowchart of a general-purpose agent.

FIG. 7 is a processing flowchart when communication is interrupted.

FIG. 8 is a communication system reselection operation flowchart.

FIG. 9 is an operation flowchart of the home machine.

FIG. 10 is a flowchart of a login position recognition process.

FIG. 11 is a block diagram of a login position recognition system.

FIG. 12 is an explanatory diagram of types of position recognition methods.

FIG. 13 is an explanatory diagram of an e-mail selective transfer operation.

FIG. 14 is a reference explanatory diagram of a method of performing information synchronization processing.

FIG. 15 is an information synchronization processing flowchart.

[Explanation of symbols]

 11-1 to 11-3 Application agent 12 General-purpose agent 13-1 to 13-3 Queue 14 Communication coordinator 15 Buffer memory group

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Kenichi Okada 4-25-12 Hongo, Bunkyo-ku, Tokyo (72) Inventor Yuji Honda 1-7-12 Toranomon, Minato-ku, Tokyo Oki Electric Industry Co., Ltd. ( 72) Inventor Sadayuki Hikita 1-7-12 Toranomon, Minato-ku, Tokyo Oki Electric Industry Co., Ltd. (72) Inventor Takuro Kitayama 1-7-12 Toranomon, Minato-ku, Tokyo Oki Electric Industry Co., Ltd.

Claims (7)

[Claims] 1. When an application of a computer device selects one of a plurality of networks having different personalities to perform data communication with the other party, it accepts the communication request of the application and targets the communication request. An application agent that selects an optimal communication method based on the result of comparison between the communication capacity of each network and the communication capability and economical efficiency of each network, and the application agent that monitors the states of the plurality of networks. And a communication coordinator for maintaining communication by connecting to any of the networks according to the communication method selected by. 2. The communication system according to claim 1, wherein communication requests from a plurality of application agents are accepted, a communication order of these application agents is determined, a data queue is managed, data is temporarily stored, and data is communicated in the determined order. A data communication system using a computer device, comprising a general-purpose agent for transferring to a coordinator. 3. The communication coordinator receives, upon disconnection from the network, interruption of communication, and reconnection to the network, reception of whether transmission up to a preset synchronization point in transmission data has been completed. 2. The data communication system based on a computer apparatus according to claim 1, wherein the data communication system restarts communication by inquiring of the other side and returning to the latest synchronization point at which transmission has been completed. 4. When the communication coordinator is disconnected from the network and communication is interrupted and reconnection with the same network is not possible, the communication coordinator targets the remaining connectable networks to request communication. 2. The computer according to claim 1, wherein an optimum network is selected and a connection state is maintained based on a property of the target transmission data and at least a result of comparing the communication capacity and the economical efficiency of each network. Data communication system by device. 5. A plurality of computer devices connected to a network copy and store data having the same contents, respectively.
When using the data individually, when performing the information synchronization that updates the contents of the data in different storage locations to each other and matches them, the application agent uses the updated data that is the target of the information synchronization. 2. The data by the computer device according to claim 1, wherein information synchronization is executed for each data in an optimum order based on the result of the comparison between the communication capacity of each network and the economical efficiency of each network. Communications system. 6. The application agent recognizes the type and position of the logged-in computer device,
2. The data communication system according to claim 1, wherein an optimum communication method is selected according to the recognition result. 7. The home machine application agent unconditionally forwards the pre-specified email to the remote machine when the home machine receives the email and the user has logged in to the remote machine. 7. The data communication system by the computer device according to claim 6, wherein an emergency e-mail not specified other than that sends an incoming communication to the remote machine.