JPS62227244A - Communication control unit - Google Patents

Abstract

PURPOSE:Tp prevent the delay of a process response time, and to attain the distribution of a load on a host computer, by providing an appropriate value for the load on a line connected to the host computer, and outputting a guide message connecting to another host, in addition to connection impossibility, to a terminal equipment when a connection is impossible. CONSTITUTION:A connection request from the terminal equipment to the host computer is received at the first communication control part 2, and is sent to a terminal control part 3, and the capacity of the line connected to a connection requesting original terminal, and the appropriate value of the load on the line connected to a connection requested host are read from a line data storage part 4, and those data are sent to a line capacity supervisory part 6. The supervisory part 6 reads the load status of the line connected to the connection requested host at that time from a line load storage part 7, and finds the load on the line when the connection requesting original terminal equipment is connected, and compares it with the appropriate value of the load on thc line. And the supervisory part 6, when deciding the connection as impossible, reads the load status of the line connected to another host from the line load storage part 7, and extracts a host to which the connection requesting original terminal can be connected, and on which the minimum load is applied, and outputs a bit of information regarding the host to the connection requesting original terminal with a connection impossible signal from a user guidance part 5 through the first communication control part 2.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a line control device in a computer network consisting of an initial number terminal device and a number host computer.

[Conventional technology]

In a conventional line control device that is an interface device between a terminal device and a host computer, in response to a connection request from the terminal device to the host computer, if the connection line to the host computer has sufficient capacity, the terminal device and the host computer, and if there is not enough space, it simply outputs a connection failure message to the terminal P;

[Problem that the invention seeks to solve]

The above-described conventional line control device U connects the terminal device and the host computer in response to a connection request from the terminal device to the host computer if there is sufficient capacity of the connection line to the host computer. When the connection line to the host computer is used up to its capacity limit, there is a disadvantage that the processing response waiting time of the terminal device connected to the host computer increases.

In addition, if there is insufficient capacity for 5 lines, a connection failure message is simply output to the terminal device, so when the terminal device that receives the connection failure message issues a connection request to another host computer, it will be unable to connect again. The downside is that it can also happen.

[Means for solving the melting point]

The device of the present invention is a line control device for a computer network consisting of a plurality of terminal devices and a plurality of host computers, and is capable of determining the load status of the connection line to the host computer when a connection request is made from the terminal device to the host computer. a determining means that compares the load of the line with an appropriate value and determines whether connection is possible; a connecting means that receives a connectable signal from the determining means and connects the terminal device and the host computer; The host computer is configured to include a guidance message output means for receiving a connection impossible signal from the determination means and outputting a connection guidance message to another host computer to the terminal device.

〔Example〕

Embodiments of the present invention will be described with reference to the drawings.

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

The line control device shown in FIG. 1 includes a second communication control section 1, a first communication control section 2. Terminal control unit 31 line data storage unit 4. User guidance section 5. It is composed of a recycling capacity monitoring section 60, a line load distribution section, and a storage section 7.

Next, the operation of the present invention will be explained with reference to the drawings.

In a computer network consisting of a plurality of terminal devices and a plurality of host computers, a connection request from the terminal device to the host computer is sent by a communication control section 2 to a receiving terminal control section 3. The terminal control unit 3 collects data from the line data storage unit 4 to monitor the line capacity and determines the capacity of the connection line to the connection request source terminal and the appropriate value of the load of the connection line to the connection request destination host copy/copyter. Send to section 6.

The line data storage unit 4 stores all the capacity of the connection line to each terminal device belonging to the combiator network and the appropriate value of the load of the connection circuit to each host computer/computer. These data are initialized at the time of network generation and can be updated as appropriate.

The line capacity monitoring unit 6 reads the current load status of the connection line to the connection request destination host computer from the line load storage unit 7, determines the line load when the connection request source terminal device is connected, and calculates the line load when the connection request source terminal device is connected. The value is compared with the previously received appropriate load value for the line, and if it does not exceed the appropriate value, it is determined that connection is possible, and a connection permission signal is sent to the terminal control unit 3, and the new load status is reported to the line load. The information is stored in the storage unit 7 and the load status is updated. The line load storage unit 7 stores the ever-changing load status of the connection line to each host computer. Terminal control unit 3 that received a connection ready signal,
1. Sends information on the terminal device and host computer connected to the communication control unit 2. When the first communication control section 2 receives the information, it sends a connection request with the host computer to the second communication control section 1. When the second communication control unit receives the request, it connects the request destination host computer, and the terminal device and the host computer are connected.

In addition, if the line capacity monitoring unit 6 determines that connection is impossible, it reads the load status of the connection line to other host computers from the line load storage unit 7, and allows connection of the connection requesting terminal device. , and the host computer with the least line load is output, and information on that host computer/computer is sent to the user guidance section 5 along with a connection impossible signal.

When the user guidance section 5 receives the connection impossible signal, it creates a connection guidance message to another host computer based on the information of the host computer, and sends it to the first communication control section 2 together with the connection impossible signal.

When the first communication control unit 2 receives the connection impossible signal.

A message instructing connection to another host computer is output to the connection requesting terminal device along with a connection failure message.

〔Effect of the invention〕

As explained above, in the present invention, when the connection between the terminal device and the host computer is enabled or disabled, the load on the connection line to the host computer is provided. This has the effect of being able to prevent delays in processing response time due to

Furthermore, by outputting a connection guidance message to another host computer to the terminal device in addition to the connection failure message when connection is not possible, unnecessary connection requests on the terminal device can be prevented. It also has the effect of promoting load distribution.

[Brief explanation of drawings]

FIG. 1 is a block diagram showing the configuration of an embodiment of the present invention. 1... Second communication control section, 2... First communication control section, 3... Terminal control section, 4......
Line data storage unit, 5... User guidance unit, 6... Line capacity monitoring unit, 7... Line load storage unit. Figure 1

Claims (1)

[Claims] In a line control device for a computer network consisting of multiple terminal devices and multiple host computers,
When a terminal device requests a connection to a host computer,
a determining means that compares the load status of a connection line to the host computer with an appropriate value of the load of the line and determines whether connection is possible; and a terminal device that receives a connectable signal from the determining means. and a connection means for connecting the host computer;
A line control device comprising: a guidance message output means for receiving a connection impossible signal from the determination means and outputting a connection guidance message to another host computer to the terminal device.