JP2576384B2 - Data transfer control method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a data processing control method for transmitting and receiving data between information processing devices on a local area network (hereinafter, LAN) connected via a wide area network (hereinafter, WAN).

[0002]

2. Description of the Related Art Conventionally, in this type of data transfer control system,
When transmitting and receiving data between an information processing device on a LAN and another information processing device at a remote location via a WAN, the cost in the WAN is not considered, and an application program on the information processing device is created. At this stage, an application program was created in consideration of the WAN line type and lower-level protocol.

[0003] For example, the following processing is performed when a line failure occurs. In data transfer between LANs via a WAN, a case may occur in which data is normal up to the WAN and a line failure has occurred earlier. That is, this is a case where an abnormality has occurred in the LAN of the partner system or an application program to which the partner system has to respond has not been started. In such a case, the information processing apparatus on the transmission side normally performs retry processing on the assumption that transmission has failed. At this time, if the WAN line type is a dedicated line, the fee is a fixed amount that does not depend on the amount of information. Therefore, even if retry is repeated endlessly, there is no fee problem. On the other hand, if the WAN line type is a packet network, the fee is charged based on packet charging, and is charged every time a retry is performed. Therefore, if the retry is not successful even after retrying to some extent, it is effective to stop the retry in order to suppress unnecessary charging. Thus, when a line failure occurs, it has been required to create an application program in consideration of the line type.

In addition, the following processing when data is not transmitted / received needs to be considered when creating an application program. In other words, there is a case where data is always exchanged depending on the lower protocol even if there is no data to be transmitted / received. Further, in the case of a public line network, the fee is based on a time-based system. Therefore,
If there is no data to be transmitted / received, disconnecting the line is more effective for suppressing unnecessary charging. As described above, at the time of no communication, it is required to create an application program in consideration of a lower protocol and a line type.

[0005]

In the above-mentioned conventional data transfer control system, in order to avoid unnecessary costs in the WAN, an application program is created in consideration of the type of the WAN communication line and the lower protocol. Needed. Therefore, if a change occurs in the WAN line type or the like during operation, the application program must also be changed. Also, if the processing depending on the WAN is incorporated in the application program,
There is a problem that the same application program cannot be used between different WANs.

[0006]

In order to solve the above-mentioned problems, a data transfer control system according to the present invention comprises a plurality of local area networks connected via a wide area network.
A data transfer control method for performing data transfer between a plurality of information processing apparatuses connected to a plurality of information processing apparatuses , wherein each of the plurality of information processing apparatuses includes a corresponding one of the other information processing apparatuses.
Dress, line type available for the information processing device,
Col type, data communication control method and retry upper limit
Stores line information table indicating correspondence with information including
Line information table storage means and application
The destination information processing device ad received from the program
Stored in the line information table storage means based on the
How to control the data transmission by referring to the line information table
Transmission control selection means for selecting a method, and a transmission control selection means.
The control method selected for the step performs retry control.
When the data is transferred, the data is
Counts and stores the retry value for retrying data transfer
The retry counter and the retry counter
Retry value stored in the line information table storage means.
The retry upper limit of the line information table
Retry data transfer to the destination information processing device
Retry monitoring means for monitoring a row .

[0007]

Next, an embodiment of a data transfer control system according to the present invention will be described in detail with reference to the drawings.

Referring to FIG. 1, a data transfer control method according to an embodiment of the present invention is such that an information registration unit 105, an information analysis unit 110, a W
AN information table 120 and AP interface means 1
30, the transmission control selection means 135, the retry monitoring means 140, the no-communication monitoring means 150, and the line connection means 16
0, line disconnecting means 170, and reception control selecting means 180
And communication means 190. The information processing device 1
00 is connected to the terminal device 50 to exchange data with the operator. Further, the information processing apparatus 100 is connected to a LAN, and further connected to a partner information processing apparatus 200 on another LAN via a WAN.

The WAN information table 120 is storage means for storing a state for each data transfer. The information registering means 105 stores the WAN information table 1 based on various information input from the terminal device 50 at the start of data transfer.
20 settings are registered. The information analysis means 110 determines a data transfer control method from the information set in the WAN information table 120 by the information registration means 105, and
Register in the information table 120. The AP interface unit 130 receives data to be transmitted from the application program, and passes the data to the transmission control selection unit 135.
Also, it passes the data received from the reception control selection means 180 or from the retry monitoring means 140 to the application program. The transmission control selecting means 135 extracts the destination address from the transmission data, and
With reference to the N information table 120, the control method at the time of transfer to the partner system is recognized. Retry monitoring means 140
Monitors the retry counter in the WAN information table 120 and communicates with the communication unit 190 and the AP interface unit 13.
0 is notified. The non-communication monitoring means 150 monitors a communication state and connects or disconnects a line. Line connection means 1
60 connects a line according to an instruction from the non-communication monitoring means 150. The line disconnecting unit 170 disconnects the line according to an instruction from the non-communication monitoring unit 150. The reception control selection unit 180 extracts the source address from the received data, refers to the WAN information table 120, and recognizes the data control method with the partner system that is the transmission source. Also, the received data is passed to the AP interface unit 130. The communication unit 190 connects to the LAN, transmits transmission data to and receives reception data from another system.

Referring to FIG. 2, WAN information table 1
Reference numeral 20 stores a state related to data transfer for each partner system to be transmitted / received. WAN information table 12
In the item “0”, “partner address” indicates the address of the partner system to be transmitted / received. “WAN line type” indicates a line type such as a dedicated line or a packet network. “Lower-level protocol” indicates a lower-level protocol for data communication, such as TCP / IP.
The “control method” indicates a control method when performing data transfer as described later. “Retry upper limit value” indicates the upper limit value of the number of retries when retrying when a failure occurs.
The “retry counter” is a counter that counts how many retries have already been performed. This "retry counter"
Starts from the initial value 0, is counted up to the “retry upper limit value” when there is no response to data transmission to the partner system, and becomes 0 again when data transmission / reception is started again. The “monitoring timer upper limit value” is the non-communication monitoring means 1
50 represents the upper limit value of the non-communication monitoring timer at 50. “Line status” indicates whether the line is currently connected or disconnected.

FIG. 3 shows a data format of transmission data or reception data. The “destination address section” indicates the address of the information processing apparatus of the transmission destination. The “source address section” indicates the address of the information processing apparatus of the transmission source. “Data part” represents a data part that should be transferred. At the time of transmission, the address of the destination system is written in the “destination address”, and the address of the own system is written in the “source address”. When receiving, the address of the own system is written in the “destination address”, and the address of the partner system that transmitted the data is written in the “source address”. Come.

Next, the operation of the embodiment of the data transfer control system of the present invention will be described in detail.

First, prior to the data transfer, a data transfer path with another information processing apparatus is set in advance as follows.
It must be set in the AN information table 120. For example, from the terminal device 50, the “partner address” and the W address between the information processing device 100 and the destination information processing device 200 are transmitted.
The "line type" of the AN, the "lower protocol", the "retry upper limit value", and the "monitoring timer upper limit value" are input. The information registration means 105 searches the WAN information table 120 by the “partner address” of the input information,
If the “partner address” has already been registered, the corresponding information is overwritten with the corresponding input information. If the corresponding “partner address” has not been registered yet, a vacant area in the WAN information table 120 is secured to respond. Register each input information in the place where you want. Then, the “retry counter” in the WAN information table 120 is set to 0, and the “line state” is set to “disconnected”. Also, the information analysis means 110
Determines the “control method” according to the input information from the information registration means 105 as follows. In this embodiment, the "partner address" is input from the terminal device, but it may be determined at the time of system initialization.

FIG. 4 shows an example of the processing procedure of the operation of the information analysis means 110. First, step 1
At 11, it is determined whether the WAN "line type" charging system is a fixed amount. For example, when the “line type” is a dedicated line, the charge is generally considered to be a fixed amount, so that “control method (c)” described later will be adopted in step 115. Next, in step 112, it is determined from the "line type" and the "lower-level protocol" whether or not a charge is made when there is no data communication. For example, if the “line type” is a public line network, generally, it is a pay-as-you-go system based on time charging. When the "line type" is a packet network, a pay-as-you-go system based on packet charging is used, but if the "lower-level protocol" is one that constantly exchanges data, such as TCP / IP, for example. , Step 114
, A “control method (b)” described later is adopted. Also,
Similarly, even when the “line type” is a packet network, if the “lower-level protocol” exchanges data only when necessary, for example, DINA, step 113
, A “control method (a)” described later is adopted. The control method determined in this way is described in the WAN information table 1
20 "Control method" is set.

Next, the AP interface means 130
The transmission data having the data format shown in FIG. 3 from the application program is passed to the transmission control selection means 135. The transmission selection control unit 135 extracts a “destination address” from the transmission data, and thereby extracts the “WAN address table 120”.
, The "control method" at the time of data transfer to the partner system is recognized.

Hereinafter, specific control methods of the above-mentioned "control method (a)", "control method (b)" and "control method (c)" will be described.

When "control method (a)" is selected in information analysis means 110, that is, when retry control is performed when there is no response from the partner system, processing is performed in the following procedure.

First, at the time of data transmission, the transmission control selection means 135 passes the transmission data in the data format of FIG. Referring to FIG.
1, the retry monitoring unit 140 determines the “transmission destination address” from the transmission data.
Is extracted, thereby searching the WAN information table 120 and referring to the corresponding "retry counter" (step 142). At this time, "retry counter" =
0, that is, normal state without retry,
If “retry counter” <“retry upper limit value”, that is, whether it is in the state of retry, the transmission data is passed to the communication means 190 and transmitted to the information processing apparatus of the transmission destination (step 143). If “retry counter” ≧ “retry upper limit value”, that is, if the retry is stopped, the transmission data is discarded,
It is assumed that there is no response from the partner system and the AP interface means 130 is notified (step 14).
5).

If the communication means 190 notifies that there is no response despite the fact that the data has been transmitted to the partner system, the corresponding "retry counter" in the WAN information table 120 is counted up by one ( Step 1
44). Then, it notifies the AP interface means 130 that there is no response (step 145).

When data is received from the partner system, the communication means 190 transfers the data received from the partner system 200 to the reception control selecting means 180. The reception control selecting means 180 extracts the source address from the received data,
The "control method" of the partner system is recognized with reference to the AN information table 120. At this time, if the control method (a) is used, the reception control selecting means 180
The received data is passed to 40. The retry monitoring means 140
The source address is extracted from the received data, and the corresponding “retry counter” in the WAN information table 120 is referred to (step 146). At this time, if “retry counter” ≠ 0, that is, if a retry is being performed or the retry is stopped, the “retry counter” is reset to 0 to set a normal state in which no retry is performed (step 1).
47). If “retry counter” = 0 from the beginning, the above reset processing is unnecessary. Then, the received data is passed to the AP interface unit 130. The AP interface unit 130 passes the received data to the application program.

Next, when the "control method (b)" is selected in the information analyzing means 110, that is, when timer control during data non-communication is performed in addition to retry control when there is no response from the partner system. Is performed in the following procedure.

First, at the time of data transmission, the transmission control selection means 135 passes the transmission data in the data format of FIG. Referring to FIG. 6, non-communication monitoring means 150 extracts the “destination address” from the transmission data, and refers to the corresponding “line state” in WAN information table 120 (step 152). At this time, if the corresponding “line state” in the WAN information table 120 is “connected state”, the retry monitoring unit 140
(Step 157). Thereafter, the retry monitoring means 140 determines the control method (a),
That is, the same operation as the processing procedure of FIG. 5 is performed. If the corresponding "line state" in the WAN information table 120 is "disconnected state", the line with the partner system is connected by the line connection means 160 to enable transmission and reception (step 153), and the WAN information table is set. The corresponding "line state" of the H.120 is set to "connection state" (step 154). After these preparations are completed, the transmission control selecting means 1
35 passes the transmission data to the communication means 190 and transmits it to the partner system (step 155).

At the time of data reception, the communication means 190 transmits the data received from the partner system 200 to the reception control selecting means 1.
Hand over to 80. The reception control selecting means 180 extracts the “source address” from the received data, and
20, the “control method” is recognized. At this time, if the control method (b) is used, the received data is passed to the non-communication monitoring means 150. The non-communication monitoring means 150 sets the timer for non-communication monitoring of the non-communication monitoring means 150 to an initial state, and passes the received data to the retry monitoring means 140 for retry monitoring and starts up (step 15).
7). Thereafter, the retry monitoring unit 140 performs the same operation as the control method (a), that is, the processing procedure of FIG.

When the timer used for non-communication monitoring reaches the corresponding "monitoring timer upper limit" in the WAN information table 120, the non-communication monitoring means 150 disconnects the line by the line disconnecting means 170 (step 158). ). Then, the corresponding “line state” in the WAN information table 120
Is set to "line disconnection" (step 159).

Next, when "control method (c)" is selected in information analysis means 110, that is, when neither the retry control when there is no response from the partner system nor the timer control when there is no data communication is performed. Performs the processing in the following procedure.

At the time of data transmission, transmission control selecting means 13
5 transmits the transmission data to the communication means 190 as it is and transmits it to the partner system. That is, settings such as other control methods are not performed.

When receiving data, communication means 190
Passes the data received from the partner system 200 to the reception control selection means 180. The reception control selecting unit 180 extracts the “source address” from the received data and recognizes the corresponding “control method” in the WAN information table 120. if,
In the case of the control method (c), the AP interface means 13
Pass the received data to 0. AP interface means 130
Passes the received data to the application program.

[0028]

As described above, according to the data transfer control method of the present invention, it is possible to reduce the communication fee in the WAN without creating an application program in consideration of the WAN line type and the lower-level protocol. Further, there is no need to modify the application program when the WAN line type is changed, and further, there is an effect that one application program can be used for general purposes between different WANs.

[Brief description of the drawings]

FIG. 1 is a configuration diagram of an embodiment of a data transfer control method according to the present invention.

FIG. 2 is a diagram illustrating an example of a configuration of a WAN information table according to the present invention.

FIG. 3 is a diagram illustrating an example of a configuration of transmission / reception data according to the present invention.

FIG. 4 is a diagram illustrating an example of a processing procedure of an operation of an information analysis unit according to the present invention.

FIG. 5 is a diagram illustrating an example of a processing procedure of an operation of a retry monitoring unit according to the present invention.

FIG. 6 is a diagram illustrating an example of a processing procedure of an operation of a non-communication monitoring unit according to the present invention.

[Explanation of symbols]

 Reference Signs List 50 terminal device 100, 200 information processing device 105 information registration means 110 information analysis means 120 WAN information table 130 AP interface means 135 transmission control selection means 140 retry monitoring means 150 no-communication monitoring means 160 line connection means 170 line disconnection means 180 reception control Selection means 190 Communication means

Claims (2)

(57) [Claims] Claims: 1. A plurality of devices connected via a wide area network
Information connected to a local area network
A data transfer control method for data transfer between the processor, each of said plurality of information processing devices, each address and the information processing of the other information processing apparatus
Line type, protocol type, and data that can be used by the
Communication control method and pair with information including retry upper limit
The line information table that stores the line information table
Table storage means and the information of the destination received from the application program.
The line information table based on the address of the
Refer to the line information table stored in the
Transmission control selecting means for selecting the data transmission control method, and the control method selected by the transmission control selecting means is retried.
The information processing apparatus of the transfer destination when performing control
Retry value for retrying data transfer for each used line
Counter that counts and stores the retry value and the retry value stored in the retry counter
The line information table stored in the line information table storage means.
Information processing of the transfer destination based on the retry upper limit of the
Retry to monitor retry of data transfer to management device
A data transfer control system comprising a monitoring unit . 2. The information processing apparatus according to claim 1 , wherein each of the plurality of information processing apparatuses includes
The line information table storage means is that of the other information processing apparatus.
Shows the correspondence between each address and the upper limit of the no-communication time
Each of the plurality of information processing apparatuses , wherein each of the plurality of information processing apparatuses includes information on a counterpart received from the application program.
The line information table based on the address of the
A monitor that stores the upper limit value of the non-communication time stored in the
In the state where there is no data transfer between the storage device and the destination information processing device,
A counter for measuring time, the value of the counter and the monitoring
Above the non-communication time stored in the timer upper limit storage means.
No-communication monitoring means for monitoring no-communication time based on a limit value
When the information processing is a transfer destination according to an instruction of the non-communication monitoring means
Line connection means for connecting the line with the processing device, and information processing which is a transfer partner in accordance with an instruction from the non-communication monitoring means.
Line disconnecting means for disconnecting the line with the processing device.
The data transfer control method according to claim 1, wherein: