JPH06237283A - Communication control system - Google Patents

Abstract

PURPOSE:To improve the communication efficiency by dynamically changing plural communication lines. CONSTITUTION:A first communication equipment 1 indicates a communication request for the purpose of communicating with a second communication equipment 2, and a communication controller 3 controls communication between first and second communication equipments 1 and 2 through plural communication lines based on this indication of the communication request. A line connection management means 31 manages the number of plural communication lines 12 based on the operation states of plural communication lines 12 and the communication capacity changing with time, and a communication line control means 32 controls connection of communication lines managed by the line connection management means 31 out of plural communication lines 12.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a communication control system for controlling communication between communication devices via a plurality of communication lines.

[0002]

2. Description of the Related Art In recent years, data communication has been performed between communication devices via a communication line. For example, it has become possible to transmit data processed by an electronic computer to another electronic computer or receive data from another electronic computer in the electronic computer.

Further, since the amount of data to be communicated has increased more and more, high communication performance is required, and a plurality of communication lines have come to be used. Further, the initial cost and running cost required for communication are increasing with the number of communication lines to be used, and there is a strong demand to reduce these costs.

[0004]

However, in the conventional communication control system, the electronic computer and the other electronic computer are always controlled to be connected by a plurality of communication lines. Therefore, when the amount of data to be communicated by the computer is smaller than the total communication capacity of the plurality of communication lines, some communication lines become idle, resulting in very poor communication efficiency. .

Therefore, a communication control system has been desired in which the number of a plurality of communication lines is dynamically changed according to the communication capacity.
Further, for example, if the communication line in the idle state is assigned to another electronic computer, the communication efficiency can be improved, and thus such a communication control system has been desired.

The present invention has been made in view of the above circumstances, and an object thereof is to provide a communication control system capable of improving communication efficiency by dynamically changing a plurality of communication lines. To do.

[0007]

In order to solve the above problems and achieve the object, the present invention has the following constitution. FIG. 1 shows the principle of the present invention.

The present invention has a first communication device 1, a second communication device 2, and a communication control device 3. The first communication device 1 issues a communication request instruction to perform communication, and the second communication device 2 is connected to a plurality of communication lines 12 and communicates with the first communication device 1. The communication control device 3 is
Communication between the first communication device 1 and the second communication device 2 is controlled via a plurality of communication lines 12 based on a communication request instruction from the first communication device 1.

The communication control device 3 has a line connection management means 31 and a communication line control means 32. The line connection management means 31 manages the number of lines of the plurality of communication lines 12 based on the operating states of the plurality of communication lines 12 and the communication capacities that change with time. The communication line control means 32 includes the line connection management means 31 among the plurality of communication lines 12.
Configured to control the connection of the communication line corresponding to the number of lines managed by.

Here, the first communication device 1 is, for example, a high-order electronic computer, and the second communication device 2 is, for example, another electronic computer. Also, one or more communication lines 1
6 is connected and a third communication device 5 that communicates with the first communication device 1 is provided, and the line connection management means 31 is configured such that the first communication device 1 is the third communication device 5
Multiple communication lines when a communication request instruction is issued to
It is preferable that the communication line corresponding to the communication line 16 of the two is disconnected and the disconnected line is allocated to the communication with the third communication device 5.

Further, the communication control device 3 is provided corresponding to a plurality of communication lines 12, and a plurality of single link protocol units 33 for operating the corresponding communication lines 12, and a plurality of single link protocol units 33.
And a multilink protocol unit 34 for managing the.

The multilink protocol unit 34 manages the single link protocol unit 33 corresponding to the number of lines managed by the line connection management unit 31, and the communication line control unit 32 manages the managed single link protocol. Only the communication line 12 corresponding to the unit 33 is connected.

Further, when the line connection management means 31 disconnects the communication line, another communication protocol section 35 is provided for allocating the disconnected line for communication between the first communication device 1 and the third communication device 5. To do.

[0014]

According to the present invention, the line connection management means 31 in the communication control device 3 based on the communication request instruction from the first communication device 1 performs communication that changes with the operating states of the plurality of communication lines 12 with time. The number of communication lines 12 is managed based on the capacity.

Then, the communication line control means 32 controls the connection of the communication lines among the plurality of communication lines 12 corresponding to the number of lines managed by the line connection management means 31. further,
The first communication device 1 is connected to the second communication device 1 via the controlled communication line.
To communicate with the communication device 2.

That is, since a plurality of communication lines are dynamically changed according to the communication capacity, useless communication lines are eliminated and communication efficiency can be improved. Further, the line connection management means 31 determines the plurality of communication lines 12 when the first communication device 1 issues a communication request instruction to the third communication device 5.
Since the communication line corresponding to the communication line 16 in the above is disconnected and the disconnected line is assigned to the communication with the third communication device 5, there is no communication line in an empty state, and the communication efficiency can be improved.

[0017]

EXAMPLES Specific examples of the communication control system according to the present invention will be described below. FIG. 2 is a configuration block diagram of an embodiment of an electronic computer system for realizing the communication control method. <Structure of Embodiment> In FIG. 2, although not shown, the electronic computer 1 has a central processing unit, an input / output device, a storage device, etc., and processes other data as well as other electronic computers 2.
Alternatively, a communication request instruction for data communication is issued to the other-hand male computer 5.

The computer 1 is connected to the communication control unit 3 and three communication lines 12a, 12b, 12c are connected. This communication control device 3 has three communication lines 12a, 12 based on a communication request instruction from the electronic computer 1.
The communication with the electronic computer 1 or the electronic computer 5 is controlled via b and 12c.

Three communication lines 12a, 12b, 12c
Are connected to the switching network 4. Under the control of the communication control device 3, this switching network 4 has three communication lines 12a, 12b,
12c and three communication lines 1 connected to another computer 2
4a, 14b, 14c or one communication line 16 connected to another computer 5 is connected.

When the electronic computer 1 is in communication only with another electronic computer 2, the communication control device 3 determines whether the other electronic computer 1 responds to the communication capacity which changes with time or the required communication performance. Communication lines 12a, 1 for the electronic computer 2
The number of lines 2b and 12c to be connected is dynamically changed from one line to three lines.

Further, the communication control device 3 issues a communication request instruction to communicate with the electronic computer 1 and the other electronic computer 5 while using three lines between the electronic computer 1 and the other electronic computer 2. In this case, one of the communication lines 12 connected to the other electronic computer 2 is disconnected, the disconnected line is assigned to the communication with the other electronic computer 5, and the communication is started.

FIG. 3 is a block diagram of the communication control device 3. The communication control device 3 is configured as follows. The communication line controller 32 includes communication lines 12a, 12b,
12c controls the connection with the communication line 12a,
The disconnection control of 12b and 12c is performed, and the connection between the connected communication lines 12a, 12b and 12c and the single link protocol units 33a, 33b and 33c to be used is controlled.

The communication line control unit 32 includes a single link protocol unit 33a, 33b, 33c (hereinafter referred to as SLP).
Called. ) Is connected. SLP 33a, 33b, 3
3c is a communication protocol that operates on one communication line.

As the communication protocol, for example, a data link protocol for realizing a data link service is used. As a typical example of this data link protocol, an asynchronous balanced mode (ABM mode) of a high level data link (hereinafter referred to as HDLC) procedure is used.

The SLPs 33a, 33b, 33c have a multilink protocol section 34 (hereinafter referred to as MLP).
Are connected. The MLP 34 controls a plurality of SLPs 33 and controls communication, and the control unit on the higher-order computer 1 side appears to control one line. MLP
The computer 34 is connected to an inter-computer interface unit 36 for the computer 1.

The line connection management unit 31 includes a communication line control unit 3
2, MLP 34, computer interface 36
Is connected to the communication line 12a, 12b, 12c, and when the communication capacity is insufficient or insufficient, the communication line 12 that should be dynamically connected to the MLP 34 is connected.
Instruct to increase or decrease.

Further, the line connection management unit 31 instructs the MLP 34 to increase or decrease the number of communication lines 12a, 12b, 12c to be dynamically connected according to the communication performance instruction requested from the electronic computer 1.

Three communication lines are being used by the MLP 34, and the computer 1 to the other communication protocol unit 3
When a connection request to another electronic computer 5 is made by 5, the line connection management unit 31 instructs the MLP 34 to disconnect one of the three lines in use, and the line is disconnected. The communication line is assigned to the other communication protocol unit 35.

The other communication protocol section 35 uses the assigned line to connect to the other electronic computer 5 and start communication. <Process of Embodiment> FIG. 4 is a process flow of the embodiment. Next, processing of the communication control method in the embodiment configured as described above will be described with reference to the drawings.

First, the electronic computer 1 issues a data communication request instruction to the communication control device 3 (step 10).
1). Next, in the communication control device 3, based on the communication request instruction from the electronic computer 1, it is determined whether the electronic computer 1 communicates only with the other electronic computer 2 (step 10).
2).

Here, when the electronic computer 1 communicates only with the other electronic computer 2, the line connection management unit 31 monitors the operating status of the operating communication lines 12a, 12b, 12c to check the communication capacity. When the excess or deficiency occurs, the communication lines 12a, 12b, 12 that should be dynamically connected to the MLP 34
An instruction is given to increase or decrease c (step 103).

For example, the line connection management section 31 monitors the operating conditions of the operating communication lines 12a, 12b, 12c,
If the communication capacity of two lines is sufficient, the MLP 34 is instructed which communication lines 12a and 12b should be connected.

The line connection management unit 32 also instructs the MLP 34 to increase or decrease the number of communication lines 12a, 12b, 12c to be dynamically connected according to the communication performance instruction requested from the electronic computer 1.

Then, the MLP 34 activates only the SLP 33 in response to the instruction to increase or decrease the communication line from the line connection management unit 31. Furthermore, in the communication line controller 32,
Only the communication line corresponding to the activated SLP 33 will be connected (step 104).

For example, when the communication line increase / decrease instruction from the line connection management unit 31 is two lines, the SLP 33a,
Only 33b is activated. Then, the communication line control unit 32 connects only the communication lines 12a and 12b corresponding to the activated SLPs 33a and 33b.

Further, the switching network 4 is connected to the communication line 1
The computer 1 and the other computer 2 are connected by connecting 2 and the corresponding communication line 14 (step 105). From this, computer 1 and other computer 2
The data communication is started with.

That is, the communication control device 3 communicates with another computer 2 via the communication lines 14a, 14b, 14c in accordance with the communication capacity that changes with time in the computer 1 or the required communication performance. 12a, 12b,
12c is dynamically changed from one line to three lines and connected. Therefore, useless communication lines are eliminated, and communication efficiency can be improved.

On the other hand, when the electronic computer 1 communicates with the other electronic computer 2 and the other electronic computer 5 in step 102, the following processing is performed. Here, for example, in the communication control device 3, the communication line 1 by the MLP 34 is used.
2a, 12b, 12c are used, and it is assumed that the computer 1 issues a communication request instruction to connect to the other computer 5 by the other communication protocol unit 35.

In this case, the line connection management unit 31 uses the M
3 lines 12a, 12 used for LP34
For example, one of the b and 12c is instructed to disconnect one line 12c. Further, the line connection management unit 31 assigns the disconnected communication line to the other communication protocol unit 35 (step 106).

The other communication protocol section 35 uses the assigned line 12c to communicate with the computer 1 and the communication line 16.
Communication is started by connecting to another electronic computer 5 via (step 107).

As described above, according to the embodiment, the electronic computer 1
In the communication control device 3, the line connection management unit 31 manages the number of the plurality of communication lines 12 based on the operating states of the plurality of communication lines 12 and the communication capacities that change over time based on the communication request instruction. .

Then, the communication line controller 32 controls the connection of the communication lines corresponding to the number of lines managed by the line connection manager 31 among the plurality of communication lines 12. Further, the electronic computer 1 communicates with the other male computer 2 via the controlled communication line.

That is, since a plurality of communication lines are dynamically changed according to the communication capacity, useless communication lines are eliminated and communication efficiency can be improved. Also, the line connection management unit 31 disconnects the communication line 12c corresponding to the communication line 16 of the plurality of communication lines 12 when the electronic computer 1 issues a communication request instruction to the other electronic computer 5, and Since the disconnection line is assigned to the communication with the other electronic computer 5, there is no communication line in a free state, and the communication efficiency can be improved.

In the embodiment, three lines have been described as an example of the plurality of communication lines 12, but other numbers of lines may be used. In this case, SLPs 33 corresponding to the number of lines are provided, and these SLPs 33 are connected to the MLP 34.
To be managed by

Further, in the embodiment, one line is used for the communication between the electronic computer 1 and the other electronic computer 5, but other number of lines may be used. In this case, another communication protocol unit 35 corresponding to the number of lines is provided and the other communication protocol unit 35 allows the computer 1 and the other computer 5 to operate.
It is also possible to communicate with.

[0046]

According to the present invention, the line connection management means 31 operates on the basis of the communication request instruction of the first communication device 1 to make a plurality of communication lines based on the operating states of the plurality of communication lines 12 and the communication capacities that change with time. Manages the number of communication lines 12 of. The communication line control unit 32 controls the connection of the communication lines corresponding to the number of lines managed by the line connection management unit 31 among the plurality of communication lines 12.

That is, since a plurality of communication lines are dynamically changed according to the communication capacity, useless communication lines are eliminated and communication efficiency can be improved. Further, the line connection management means 31 determines the plurality of communication lines 12 when the first communication device 1 issues a communication request instruction to the third communication device 5.
Since the communication line corresponding to the communication line 16 in the above is disconnected and the disconnected line is assigned to the communication with the third communication device 5, there is no communication line in an empty state, and the communication efficiency can be improved.

[Brief description of drawings]

FIG. 1 is a principle diagram of the present invention.

FIG. 2 is a configuration block diagram of an embodiment.

FIG. 3 is a configuration block diagram of a communication control device according to an embodiment.

FIG. 4 is a flow chart showing the processing of the communication control method of the embodiment.

[Explanation of symbols]

1 ... Electronic computer 2 ... Other electronic computer 3 ... Communication control device 4 ... Switching network 5 ... Other electronic computer 12a-12c ... Communication line 14a-14c ... Communication line 16 ... Communication line 31 ... Line connection management unit 32 ··· Communication line control unit 33a to 33c · · Single link protocol unit (SL
P) 34 ... Multi-link protocol unit (MLP) 35..Other communication protocol unit 36..Computer interface unit

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Masahiro Kurita, 1015 Kamiodanaka, Nakahara-ku, Kawasaki City, Kanagawa Prefecture, Fujitsu Limited (72) Inventor, Kuniichi Matsumoto, 1015, Kamikodanaka, Nakahara-ku, Kawasaki City, Kanagawa Prefecture, Fujitsu Limited

Claims (4)

[Claims] 1. A first communication device (1) for issuing a communication request instruction for communication, and a plurality of communication lines (12) are connected and communicate with the first communication device (1). A second communication device (2) and the first communication device (1) via a plurality of communication lines (12) based on a communication request instruction from the first communication device (1).
And a communication control device (3) for controlling communication with a second communication device (2), wherein the communication control device (3) includes the plurality of communication lines (1
Line connection management means (31) for managing the number of lines of the plurality of communication lines (12) based on the operating state of 2) and the communication capacity that changes with time, and among the plurality of communication lines (12), A communication control system comprising: a communication line control unit (32) for controlling connection of communication lines corresponding to the number of lines managed by the line connection management unit (31). 2. A line connection management means, comprising one or more communication lines (16) and a third communication device (5) communicating with the first communication device (1). (31) is connected to the communication line (16) of the plurality of communication lines (12) when the first communication device (1) issues a communication request instruction to the third communication device (5). 2. The communication control system according to claim 1, wherein the corresponding communication line is disconnected and the disconnected line is assigned to communication with the third communication device (5). 3. The communication control device (3) is provided corresponding to a plurality of communication lines (12), and a plurality of single link protocol units (33) for operating the corresponding communication lines (12), respectively. , A multi-link protocol unit (34) for managing a plurality of single-link protocol units (33), wherein the multi-link protocol unit (34) manages the number of lines managed by the line connection management means (31). Managing the corresponding single link protocol unit (33), and the communication line control means (32) connects only the communication line (12) corresponding to the managed single link protocol unit (33). The communication control system according to claim 1 or 2. 4. Another communication protocol in which, when the line connection management means (31) disconnects a communication line, the disconnection line is assigned to communication between the first communication device (1) and the third communication device (5). The communication control system according to claim 2, wherein a part (35) is provided.