JPH07221816A - Communication control method, its equipment and communication system using the equipment - Google Patents

Abstract

PURPOSE:To execute the communication abnormality processing by storing information relating to plural methods coping with a communication abnormality and selecting any of the stored information sets. CONSTITUTION:A control section 4 is provided with a selector switch 7 selecting the processing method on the occurrence of a communication abnormality. A control program executing the processing is stored in a memory 4a of the control section 4 of a computer 1. On the occurrence of a transmission error, the setting of the selector switch 7 is confirmed. When the selector switch 7 is set to command re-transmission from the first, data are sent from the start of the transmission data. When the selector switch 7 is set to the interruption of transmission, a message representing the occurrence of transmission trouble is displayed on a display device 5 and then the transmission processing is finished. When the selector switch 7 sets the re-transmission from the position of the message at which the error takes place, the message is sent again from the message point at which the error takes place.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a communication system for transmitting and receiving between a plurality of communication terminals, a communication device used in the communication system and a communication method thereof.

[0002]

2. Description of the Related Art Conventionally, a plurality of devices such as computers or terminals are connected by wire or wirelessly to transmit / receive data to / from each other.

As a coping method in the case where a communication error occurs for some reason during data transmission / reception and a transmission error occurs, (1) communication is interrupted and an error message is issued.

(2) Data is retransmitted from the beginning.

(3) Retransmission is performed from data in which an error has occurred. Etc. are used.

[0006]

However, in the case of the conventional device, the method of coping with the occurrence of the above-mentioned communication abnormality is predetermined for each device. In order to deal with such an abnormal situation, it is necessary to make the handling methods the same between the communication terminals connected to each other.
It is impossible to change it to deal with it, or
Even if the coping method can be changed, a special operation for changing is necessary. Therefore, you can change the handling method for abnormal situations for each terminal, or even in the same terminal,
It was extremely difficult to easily change the coping method according to the coping request at that time.

The present invention has been made in view of the above-mentioned conventional example, and an object of the present invention is to provide a communication system, a communication control method, and an apparatus thereof, by which a user can easily select a process when a communication abnormality occurs. .

It is another object of the present invention to provide a communication system, a communication control method, and a device therefor, in which when a user of a communication device is different, a method for coping with a communication abnormality can be set and registered for each user. To do.

[0009]

In order to achieve the above object, the communication control device of the present invention has the following configuration. That is, storage means for storing information regarding a plurality of methods for coping with communication abnormality, selection means for selecting any of the information stored in the storage means, and coping method corresponding to the information selected by the selection means. And a control means for executing the communication abnormality process.

In order to achieve the above object, the communication control method of the present invention includes the following steps. That is, the step of inputting and storing the user name of the communication device, the step of storing information regarding a plurality of methods for coping with the communication abnormality and selecting one of the stored information, When it occurs, the step of reading the information corresponding to the stored user name and executing the communication abnormality processing by the coping method corresponding to the information is included.

[0011]

In the above structure, information on a plurality of methods for coping with a communication abnormality is stored, and any one of the stored information is selected. The communication abnormality processing is executed by the coping method corresponding to the selected information.

According to another aspect of the invention, the user name of the communication device is input and stored, and information on a plurality of methods for coping with communication abnormalities is stored, and any one of the stored information is stored. Select and memorize. Then, when a communication abnormality occurs, the information corresponding to the current user name is read, and the communication abnormality processing is executed by the coping method corresponding to the information.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT A preferred embodiment of the present invention will now be described in detail with reference to the accompanying drawings.

FIG. 1 is a block diagram showing the outline of a communication system according to the first embodiment of the present invention.

In FIG. 1, each of 1 and 2 is a computer device (communication terminal) having a communication function,
A control unit 4 including a CPU and a memory, a display 5,
A keyboard 6 and the like are provided. In addition, the control unit 4 includes a selection switch 7 for selecting a processing method when a communication abnormality occurs.
Is provided. 3 is these computer equipment 1, 2
It is a cable that connects each other. Reference numeral 4a is a memory for storing items of various coping methods which will be described later. The memory 4a may also store processing programs corresponding to various coping methods.

FIG. 2 is an enlarged view of the selection switch 7 provided in the computer device of this embodiment.

In FIG. 2, each of the numbers from (1) to (3) indicates the number of the coping method that can be selected. The coping method for each of them is described separately in, for example, the instruction manual of this computer device.
By rotating the rotating portion 21 of the selection switch 7, the arrow 20
By matching with the desired number, the coping method corresponding to the number can be selected. In the example of FIG.
The case where the coping method corresponding to the number is selected is shown.

The operation of the computer device 1 of this embodiment will be described below with reference to the flowchart of FIG. In this flowchart, a case where data is transmitted from the computer device 1 to the computer device 2 will be described. Before executing the processing of FIG. 3, the selection switch 7 is set in advance by an operator or the like so as to select a desired or error handling method corresponding to the error handling method of the computer device 2, It is assumed that the control program that executes this process is stored in the memory of the control unit of the computer device 1. Further, in the case of the present embodiment, as a coping method for the error, any of a coping method of retransmitting data from the beginning, a coping method of interrupting the transmission and displaying an error message, and a coping method of resending from the data in which the error occurs Description will be made in the case where either can be selected (,, correspond to the numbers in FIG. 2).

When the start of data transmission is instructed, the computer equipment 1 first confirms in step S1 that the computer equipment 2 is connected to the communication line 3. When the connection can be confirmed, the process proceeds to step S2, and data transmission from the computer device 1 to the computer device 2 is started. A known data transmission procedure capable of detecting a transmission error, such as an HDLC procedure, is used for this data transmission.

In step S3, whether or not a communication abnormality has occurred, that is, for example, the computer device 2 detects a transmission error, and the computer device 2 causes the computer device 1 to detect the transmission error.
To see if there is an error in the received data. If it can be confirmed that a transmission error has occurred in this way, the process proceeds to step S4, but if the normal transmission ends otherwise, the communication process ends. The computer device 2 determines whether or not a transmission error has occurred.
Alternatively, the computer device 1 itself may make the determination based on the NAK response from the computer, or no response from the computer device 2 within a predetermined time.

When a transmission error occurs, the process proceeds to step S4 to check the setting of the selection switch 7. If the selection switch 7 is set to instruct (retransmission from the beginning), the process proceeds to step S5, and data transmission is performed again from the beginning of the transmission data. If the setting of the selection switch 7 is (interruption of transmission), the process proceeds to step S6, a message indicating that a transmission trouble has occurred is displayed on the display 5, and the transmission process ends. Although not shown in this flowchart, when (retransmission from error location) is set by the selection switch 7,
Resend from the data part where the error occurred.

In the first embodiment, the communication line 3
However, the present invention is not limited to this, and can be applied to a wireless case, for example. This also applies to each of the embodiments described below.

As described above, according to the first embodiment,
There is an effect that a desired error coping method can be easily selected and error processing can be executed.

Further, according to this embodiment, there is an effect that the error handling method corresponding to the error handling method of the transmission / reception destination terminal can be easily set and the transmission / reception can be performed.

FIG. 4 is a block diagram showing the outline of a communication system according to the second embodiment of the present invention. Portions common to those in FIG. 1 are designated by the same reference numerals, and their description will be omitted.

In FIG. 4, reference numeral 8 denotes a memory provided in the control unit 4, and 8a stores items for executing a method for coping with various communication abnormalities (transmission / reception errors) or a control program therefor. Then, when the function of selecting the coping method when the communication abnormality occurs is activated from the keyboard 6, a selection screen for selecting the coping method is displayed on the display 5, as shown in FIG. The operator can use the keyboard 6 to select a desired coping method from the displayed coping items. The coping method thus selected is stored in the memory 8b of the control unit 4.

The operation according to the second embodiment of the present invention will be described below.
Computer equipment 1 shown in the flow chart of FIG.
A case of transmitting data from the computer to the computer device 2 will be described. The control program for executing this processing is stored in the memory of the control unit 4, and before this processing, the coping method selected by the operator in advance by the operation shown in the flowchart of FIG. It is assumed that it is stored in the memory 8b.

When the start of data transmission is instructed, the computer equipment 1 first confirms in step S11 that the computer equipment 2 is connected to the communication line 3. When the connection can be confirmed, the process proceeds to step S12, and data transmission from the computer device 1 to the computer device 2 is started. A known data transmission procedure capable of detecting a transmission error, such as an HDLC procedure, is used for this data transmission.

In step S13, whether or not a communication abnormality has occurred, that is, the computer device 2 detects a transmission error, and the computer device 2 notifies the computer device 1 that the received data has an error. See if it will be done. If it can be confirmed that a transmission error has occurred in this way, the process proceeds to step S14, but if the normal transmission ends otherwise, the communication process ends. The computer device 1 itself may determine whether or not a transmission error has occurred based on a NAK response from the computer device 2 or no response from the computer device 2 within a predetermined time.

When a transmission error occurs, step S14
Then, the contents of the selected coping method (coping item or program for executing the coping method) stored in the memory 8b are read. Then, if the read content of the coping method is to retransmit the transmission data from the beginning, the process proceeds to step S15, and the data is transmitted to the computer device 2 again from the beginning of the transmission data. On the other hand, if the read content of the coping method is interruption, the process proceeds to step S16, a message indicating that a communication trouble has occurred is displayed on the display 5, and the transmission process ends.

FIG. 7 is a flow chart showing the selection processing of the error coping method in the computer device 1 of this embodiment. First, in step S21, it is checked whether or not an instruction for selecting the coping method is input from the keyboard 6. When the instruction is input, the process proceeds to step S22, and the countermeasure items stored in the memory 8a are read and displayed on the screen of the display 5 as shown in FIG. 5 (step S22).
23). Next, in step S24, it is determined whether or not a desired item among the coping items displayed on the screen is selected by an instruction from the keyboard 6, for example. Thus, the process proceeds to step S25, and the selected item is stored in the memory 8b.

As described above, this processing may be performed before the processing shown in the flowchart of FIG. 6 is started, or step S1 of the flowchart of FIG.
It may be performed after a transmission error occurs in 3. Note that this processing will be described later with reference to the flowchart in FIG.

As described above, according to the second embodiment,
Since the method of coping with the communication error is selected by software, even if the number of selection items increases, it is possible to easily cope with the increase by increasing the number of items on the selection screen to be displayed. As a result, unlike the case of the switch, there is an advantage that there is no physical limitation on the item of the coping method.

Further, by storing a program corresponding to each coping method and executing the program according to the selected coping item, any error processing can be performed without changing the application program. Can handle.

In the second embodiment, the case where there are two selection items has been described. However, as in the first embodiment, this coping method is not limited to this.

The error handling method that can be selected is not limited to a single method, and a plurality of handling methods may be combined. For example, if a communication error still occurs after the data is transmitted again from the beginning five times in a row, the transmission is temporarily stopped and the display 5
It is also possible to display a message to the effect that communication has been interrupted. In this case, the operation for selecting the combination can be arbitrarily set according to the software that executes this selection processing. As a known method, for example, by sequentially pressing the keys of the numbers corresponding to the desired selection items while pressing the special keys of the keyboard 6,
There is a method to select multiple selection items at the same time.

Next, the operation of the communication system according to the third embodiment of the present invention will be described with reference to the flowchart of FIG. The basic system configuration of this embodiment is similar to that of the second embodiment described above, and the method of coping with the occurrence of an abnormality also corresponds to the modification of the second embodiment described above.

When the data transmission start is instructed, the computer equipment 1 confirms that the computer equipment 2 is connected to the communication line (step S31). When the connection can be confirmed, the process proceeds to step S32, and the computer device 1
Then, data transmission to the computer device 2 is started. A known data transmission procedure capable of detecting a transmission error, such as an HDLC procedure, is used for this data transmission. When a communication error occurs and the computer device 2 detects a transmission error, the process proceeds to step S34, and the computer device 2 notifies the computer device 1 that the received data has an error. Upon receiving this error notification, the computer device 1 displays the coping method selection screen as shown in FIG. 5 at this point (step S35).

Here, for example, if the method of retransmitting data from the beginning is selected, steps S36 to S37 are performed.
Proceed to and repeat the data transmission from the beginning of the transmission data.
On the other hand, when the interruption of the transmission is selected, the process proceeds to step S38, a message is displayed on the display 5, and the transmission is ended. The process of selecting a desired coping method from the items displayed on this screen corresponds to the process shown in the flowchart of FIG.

According to the third embodiment, the selection process of the coping method for the error processing is not executed unless the communication abnormality occurs. Therefore, when the reliability of the communication line is high, the operator does not have to perform the operation. Can be reduced.

Further, since the coping method is selected every time a communication abnormality occurs, for example, when the abnormality occurs continuously, the coping method can be changed on the way.

Next, the operation of the communication system according to the fourth embodiment of the present invention will be described. The system configuration of the fourth embodiment is the same as the configuration of the second embodiment shown in FIG. 4, but the control unit 4 has a software function to provide a method of coping with the occurrence of a communication error for each operator. There is a function that can be selected. As a result, the control unit 4 has a memory 8b, which will be described later, for storing the operator name (user name) input from the keyboard 6 or the like.

When this selection function is activated, a screen for inputting an operator (user) name is displayed on the display 5, as shown in FIG. 9, for example. When the user name is entered with the keyboard 6, a coping method selection screen is displayed next, and the user can select any coping method from the displayed items. The selected coping method is stored in the memory 8b of the control unit 4 in association with the user name.

The operation of the fourth embodiment of the present invention will be described below with reference to the flowchart of FIG. 10 in the case of transmitting data from the computer device 1 to the computer device 2. In this process, it is assumed that an error coping method corresponding to the user name has been stored in the memory 8b in advance. For example, as a coping method, the user A uses the "method of retransmitting data from the beginning" to the user B. Has selected "Method of interrupting communication and issuing error message". When the user uses the computer device 1, the user name is first input and then the computer device 1 is used. Steps S41 to S43 of this process are
Steps S1 to S3 or step S of the above-described embodiment
Since it is similar to 11 to S13, a brief description will be given.

First, in step S41, when the data transmission start is instructed, the computer equipment 1 confirms that the computer equipment 2 is connected via the communication line. When the connection can be confirmed, data transmission is started to the computer device 2 in step S42. Next, in step S43, it is determined whether or not a communication error has occurred, and if an error has occurred, the process proceeds to step S44, and the user name registered before the start of this transmission process and registered in the memory 8b is confirmed. . Then, in step S44, the stored coping method is selected and processed according to the confirmed user name. That is, when the user is A, the process proceeds to step S45, data is retransmitted from the beginning,
Repeat until the transmission is completed correctly. Also, if the user is B
If it is, the process proceeds to step S46, the communication process is interrupted, a message indicating that the communication is interrupted is displayed on the display 5, and the transmission process ends.

FIG. 11 is a flow chart showing the processing for registering the coping method corresponding to the user in the fourth embodiment.
A control program for executing this process is also stored in the memory of the control unit 4.

When the user name is instructed to be input from the keyboard 6, the process proceeds to step S51, and a message indicating that the user name is input is displayed on the display 5, as shown in FIG. Here, when the name of the user is input from the keyboard 6, the process proceeds to step S52, and the name is stored in the memory 8
Store in b. Next, in step S53, the memory 8a
The countermeasure items stored in are read out and displayed on the screen of the display 5 as shown in FIG. 5 (step S5).
4). Here, when the user selects a desired item, the process proceeds to step S56, and the selected countermeasure item and the user name are registered in the memory 8b in association with each other.

As described above, according to the fourth embodiment,
Since the coping method for the communication error can be registered for each user, even if another user changes the coping method, the own setting is not changed. Therefore, the error handling intended by the user is handled. There is no problem that different processing is executed. It should be noted that the user name in the present embodiment does not necessarily have to be the actual name as long as it has a role capable of identifying the individual, and may be an ID code different for each individual, for example.

The above-mentioned respective embodiments may be carried out individually or in combination with each other. Further, the above-described error handling processing for communication abnormality is merely an example, and the present invention is not limited to this.

The present invention may be applied to a system composed of a plurality of devices or an apparatus composed of a single device. Further, it goes without saying that the present invention can also be applied to the case where it is achieved by supplying a program for implementing the present invention to a system or an apparatus.

As described above, according to the present embodiment, the method of coping with the occurrence of a communication abnormality can be easily selected, so that the convenience of the user can be improved.

[0052]

As described above, according to the present invention, the user can easily select the process to be performed when a communication abnormality occurs.

Further, according to the present invention, even if the users of the communication device are different, there is an effect that a coping method for a communication abnormality can be set and registered for each user.

[Brief description of drawings]

FIG. 1 is a schematic configuration diagram of a communication system according to a first embodiment of the present invention.

FIG. 2 is an enlarged view of a selection switch according to the first embodiment.

FIG. 3 is a flowchart showing the operation of the first embodiment of the present invention.

FIG. 4 is a schematic configuration diagram of a communication system according to second to fourth embodiments of the present invention.

FIG. 5 is a diagram showing a display example of a screen when a coping method is selected in the present embodiment.

FIG. 6 is a flowchart showing the operation of the second embodiment.

FIG. 7 is a flowchart showing selection processing of a coping method in the second embodiment.

FIG. 8 is a flowchart showing the operation of the third embodiment of the present invention.

FIG. 9 is a diagram showing a display example of a screen for inputting a user name in the fourth embodiment.

FIG. 10 is a flowchart showing the operation of the fourth embodiment.

FIG. 11 is a flowchart showing an input process of a coping method corresponding to a user name in the fourth embodiment.

[Explanation of symbols]

 1, 2 Computer equipment 3 Communication line 4 Control section 5 Display 6 Keyboard 7 Selection switch 4a, 8, 8a, 8b Memory

Claims (9)

[Claims] 1. Storage means for storing information on a plurality of methods for coping with communication abnormality, selection means for selecting any one of the information stored in the storage means, and information corresponding to the information selected by the selection means. And a control means for executing a communication abnormality process according to the coping method. 2. The communication control device according to claim 1, wherein the selection unit is a switch. 3. The communication control device according to claim 1, further comprising processing information storage means for storing information selected by the selection means. 4. The selection means is a display means for displaying an item related to information stored in the storage means, and an item selection means for selecting a desired item from a plurality of items displayed on the display means. 1. The method according to claim 1, wherein
The communication control device according to. 5. An operator storage means for inputting and storing a user name of a communication device, a storage means for storing information regarding a plurality of methods for coping with communication abnormalities, and one of information stored in the storage means. Selection means for selecting, a user information storage means for storing the user name input by the input means and the information selected by the selection means in association with each other, and a user stored in the operator storage means A communication control device comprising: a control unit that reads information corresponding to a name from the user information storage unit and executes communication abnormality processing by a coping method corresponding to the information. 6. A step of storing information about a plurality of methods for coping with a communication abnormality and selecting any of the stored information, and a coping method corresponding to the selected information when a communication abnormality occurs. And a step of performing communication abnormality processing by the method. 7. A step of inputting and storing a user name of a communication device, and a step of storing information regarding a plurality of methods for coping with a communication abnormality and selecting any of the stored information. When a communication abnormality occurs, the information corresponding to the stored user name is read, and the communication abnormality processing is executed by the coping method corresponding to the information, the communication control method. 8. A communication system comprising the communication control device according to claim 1. 9. A communication system for executing the communication control method according to claim 6.