JPH057233A - Data communication device - Google Patents

Abstract

PURPOSE:To automate the setting of the response monitoring time of all electronic computers even when a communication satellite is added by the increase of an exchange by measuring automatically the network delaying time at the time of setting a communication channel and setting automatically the response monitoring time for each communication channel. CONSTITUTION:A communication channel 6 from an electronic computer 1 to an electronic computer 2 is set, and when the communication channel 6 is set, a response monitoring time setting mechanism 4 obtains the request transmitting time and transmits network delaying measuring request data 7. Immediately when a response monitoring time automatic setting mechanism 5 receives the network delaying measuring request data 7, the mechanism 5 transmits network delaying measuring response data 8. Further, when the response monitoring time automatic setting mechanism 4 receives the network delaying measuring response data 8, the mechanism 4 obtains the response receiving time. From the response receiving time, the request transmitting time is subtracted, the network delaying time is obtained, the stipulating time is added to the network delaying time and set as the response monitoring time. Thus, the response monitoring time is automatically set by the response monitoring time automatic setting mechanism 4.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a data communication device,
In particular, the present invention relates to a data communication device in a network system capable of forming a plurality of communication paths by multistage exchanges including communication satellites.

[0002]

2. Description of the Related Art In the conventional setting of response monitoring time in a data communication apparatus, a fixed time value is set by system generation in all computers connected to the network in accordance with the communication path having the longest delay time.

[0003]

Since the response monitoring time setting in the above-mentioned conventional data communication apparatus is a fixed time value in accordance with the communication path having the longest delay time, a communication satellite or the like may be installed by adding an exchange. When added, there is a drawback that the update of the response monitoring time of all computers connected to the network must be changed by system generation.

[0004]

The data communication apparatus of the present invention has a mechanism for automatically measuring the network delay time of the communication path when setting the communication path and a mechanism for automatically setting the response monitoring time, and Response monitoring time is automatically set for all computers even if communication satellites are added by expansion.

[0005]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to the accompanying drawings.

Referring to FIG. 1, in an embodiment of the present invention, a switch 3 is connected to two electronic computers 1 and 2. Two
The two computers 1 and 2 carry out data communication through the communication path 6 via the exchange 3, and are provided with response monitoring time automatic setting mechanisms 4 and 5, respectively. Here, it is assumed that the electronic computer 1 requests the data line connection and the electronic computer 2 accepts the data line connection.

The operation of FIG. 1 will be described with reference to the flow chart of FIG. 2. First, the computer 1 to the computer 2 will be described.
The communication path 6 is set. When the communication path 6 is set, the response monitoring time automatic setting mechanism 4 acquires the request transmission time in step 21, and transmits the network delay measurement request data 7 in step 22. Response monitoring time automatic setting mechanism 5
Immediately after receiving the network delay measurement request data 7, the network delay measurement response data 8 is transmitted. When the response monitoring time automatic setting mechanism 4 receives the network delay measurement response data 8 in step 23, it acquires the response reception time in step 24.
In step 25, the request transmission time is subtracted from the response reception time to obtain the network delay time. In step 26, a prescribed time is added to this network delay time to set it as a response monitoring time. In this way, the response monitoring time is set by the response monitoring time automatic setting mechanism 4
Is automatically set by.

Another embodiment having a plurality of communication paths will be described with reference to FIG. Here, computer 1 to computer 2
Converters 10 and 1 when data communication to and from is taking place on path 19 via switches 10, 11, 12 and 13.
An exchange 14 is added between the switch 3 and the switch 3 to form a communication path 16. The route 16 is, for example, a route including a communication satellite. Even in this case, the response monitoring time automatic setting mechanism 4 measures the network delay time for the communication path 16 according to the flow of FIG. 2 and automatically sets the response monitoring time.

[0009]

As described above, according to the present invention, the network delay time is automatically measured at the time of setting a communication path and the response monitoring time is automatically set for each communication path, so that a communication satellite or the like can be added by adding an exchange. Even if it is done, there is an effect that it is not necessary to change the system generation of the response monitoring time of all the computers connected to the network.

[Brief description of drawings]

FIG. 1 is a block diagram showing the configuration of an embodiment of the present invention.

FIG. 2 is a flowchart of processing in the response monitoring time automatic setting mechanism in FIG.

FIG. 3 is a block diagram showing another embodiment of the present invention when there are a plurality of communication paths.

[Explanation of symbols]

 1, 2 Computer 3, 10, 11, 12, 13, 14 Switch 4, 5 Automatic response monitoring time setting mechanism 6, 16 Communication path 7 Network delay measurement request data 8 Network delay measurement response data

Claims (1)

Claim: What is claimed is: 1. In a data communication device for connecting a data line between a plurality of electronic computers via an exchange, means for automatically measuring a network delay time of the communication route when setting the communication route and response monitoring. A data communication device, characterized in that a means for setting time for each communication path is provided in at least one of the electronic computers.