JPH01235441A - Line use decentralization system in packet exchange - Google Patents

Abstract

PURPOSE:To recall the other data terminal equipments with less logical link setting number when the logical link setting number of a called data terminal equipment is large by providing a communication controller which decentralizes logical links that are set in accordance with calling. CONSTITUTION:As for the content of user data, the address of the equipment with less logical link setting number among the terminal equipments 12a-12c on a called side is inputted so as to respond to terminal equipments on a calling side 11 by a communication controller 13. Thus, the called terminal equipments 12a-12c on the called side can call the equipment with less logical link setting number. Thus, the setting number of the logical links among respective terminal equipments on the called side 12a-12c is easily and uniformly set, and subscriber lines 5a-5c can easily made into a uniform use state. Thus, the use efficiency of the terminal equipments 12a-12c on the called side and the subscriber lines 5a-5c connected to said equipments improves compared to a conventional communication network system.

Description

[Detailed Description of the Invention] [Summary] Regarding a line use decentralization method in packet switching of a communication network that communicates with a computer via a packet switching network, the present invention relates to a method for distributing line usage in packet switching of a communication network that communicates with a computer via a packet switching network. , the purpose of which is to make other called terminal devices with a small number of logical links set up re-call, and a large number of terminal devices that are connected to a packet switching network through ungrouped subscriber lines and output call requests. A calling terminal device and a plurality of called terminals that are connected to the packet switching network through grouped subscriber lines and return user data specifying a terminal device to be re-called to the calling terminal device. The device is configured to include a communication control device that decentralizes logical links that are set up in response to incoming calls from the called terminal device.

[Industrial application field]

The present invention provides a method for distributing line usage in packet switching of a communication network that communicates with computers via a packet switching network;
In particular, the present invention relates to a method for almost evenly distributing the usage frequency of each of a plurality of lines connected to each of a plurality of data terminal devices provided on a computer side.

(Prior Art) Conventionally, as shown in FIG. 6, as a line usage decentralization method in packet switching, a packet switching network 3 is used as an intermediary between a host computer l and a large number of terminal devices 2, and
When data is exchanged using the packet switching method, subscriber lines 5a, 5b, and 5c are connected to each of a plurality of data terminal devices 4a, 4b, and 4c provided on the host computer 1 side in groups, and each terminal The packet switching network 3 is mediated by the grouped subscriber lines 6a, 6b, and 6c connected to the device 2, and the terminal device 2 is connected to the data terminal device 4a.

A virtual communication path (hereinafter referred to as a logical link) established in call connection up to 4b and 4c is connected to each subscriber line 5a.
, 5b, and 5c. In this method, terminal groups of terminal devices 2 that have been grouped are connected from subscriber line 6a to subscriber line 5a, respectively. person line 6
Terminal group 2 connects terminals b to subscriber line 5b.
b. Assuming that the terminal group 2c is the terminal connected from the subscriber line 6C to the subscriber line 5c, when data is exchanged, when the terminal device 2 of the terminal group 2a is used, the data terminal device is connected via the packet switching network 3. Similarly, when the terminal device 2 of the terminal group 2b is used, the call connection is made to the data terminal device 4b, and when the terminal device 2 of the terminal group 2c is used, the call connection is made to the data terminal device 4c.
Data exchange requests are prevented from being concentrated on a specific data terminal device 4a, 4b, or 4c.

[Problem to be solved by the invention]

In the above-mentioned conventional line use decentralization method for packet switching, not all terminal devices 2 are operating at the same time in normal usage conditions, but are operating randomly, and in some cases, terminal devices 2 installed in the host computer 1 A terminal group 2a, 2b, or 2c connected to a specific data terminal device 4a, 4b, or 4c may be used intensively.

When usage is concentrated on a specific terminal group 2a, 2b, or 2c, subscriber lines 5 belonging to that group
The throughput deteriorates only by a, 5b, or 5c, and the other subscriber lines 5b and 5c, 5c and 5a, or 5
Since spaces a and 5b become vacant, usage efficiency decreases.

In addition, when there is a change in the network system, the change procedures such as dividing the terminal devices 2 into groups and changing the addresses for the data terminal devices 4a, 4b, and 4c set for each terminal device 2 are cumbersome. However, there was a problem in that changes required time and expense.

The present invention has been made in view of the above-mentioned problems, and the technical problem set to solve the problem is that when the number of logical links set for the incoming data terminal device is large, the number of logical links set is small. An object of the present invention is to provide a line usage distribution method in packet switching that causes other data terminal equipment to call again.

(Means for Solving the Problems) As a means for solving the above problems, the present invention provides a method for decentralizing line usage in packet switching of a communication network system that exchanges data via a packet switching network 3. , as shown in FIG. 1, a large number of calling side terminal devices 11 are connected to the packet switching network 3 through ungrouped subscriber lines 7 and outputting call requests via the packet switching network 3. The packet switching network 3 is connected to the packet switching network 3 through the grouped subscriber lines 5a, 5b, . . . , 5c.
A plurality of called terminal devices 12a, 12b, .
12C, and the called terminal devices 12a, 12b, . . .
, 12C, and a communication control device 13 that decentralizes logical links that are set up in response to incoming calls from 12C.

[Effect]

According to the above configuration, when the calling terminal device 11 makes a call to a specific called terminal device 12a, 12b, or 12c, the incoming called terminal device 12a, 12b,
Or there are few logical links set in 12c,
If the state is such that efficient communication is possible, a logical link is set up to enable communication. If the called terminal device 1 receives a call,
2a.

12b or 12c, and the called terminal device 12a or 12b.

Or, if the communication condition of the terminal 12c deteriorates, the communication control device 13 may be connected to another called terminal device 12b or 12c.
12c, 12a, or any one of 12a, 12b
Among these, the device with fewer logical links that does not reduce communication efficiency is selected as the called terminal device to be re-called, and its address is entered in the user data part of the packet, and the called terminal device 12a, 12b, or 12c makes a call. Side terminal device 1
The user data is returned to the host computer 1 side, and the calling side terminal device 11 makes a call again to the called side terminal device to be called again, and the called side terminal device 12 a e on the host computer 1 side
12 b s 12 c, the subscriber lines 5 a, 5 b, . . .
..., equalize the line usage of 5c.

(Example) Hereinafter, an example of the present invention will be illustrated and explained based on a case where nine calling side terminal devices and three called side terminal devices are provided.

As shown in FIG. 2, nine calling terminal devices 11 are connected to the packet switching network 3 by subscriber lines 7 that are not grouped. On the host computer 1 side, three called terminal devices 12a, 12b, and 12c are installed in a communication control device 13 connected to the central processing unit 8, and three subscriber lines are connected to the called terminal device 12a. 5a, three subscriber lines 5b to the called terminal device 12b,
Three subscriber lines are connected to the called terminal device 12c, and each called terminal device 12a, 1
2b and 12c are connected to the packet switching network 3.

As shown in FIG. 3, the communication control device 13 has a main control section 14.
to each called terminal device 12a, 12b.

12c's line control unit 15 and each called terminal device 12a, 1
2b and 12c are connected to the packet control unit 16. The packet control section 16 is connected to an ink face section 17 that is connected between the central processing unit 8 side and the main control section 14, and a user data editing section 18 that is connected to the main control section.
Connect to. The user data editing unit 18 is the called terminal device 12a having the minimum number of logical links set.

It is connected to the logical link counter 20 via the address storage register 19 of 12b or 12c. The logical link counter 20 is connected to the main control section 14 and also connected to the comparison calculation section 21 connected to the main control section 14.
Furthermore, the called terminal device 12a, 12b, or 12 having the minimum number of logical link settings to be connected to the comparison calculation unit 21
It is also connected to the logical link setting number storage register 22 of c.

The content of the packet fed back from the called terminal device 12a, 12b, 12c to the calling terminal device 11 includes a general format identifier, logical channel group number, logical channel number, packet type identifier, disconnection cause, diagnostic code, and user information. Contains data etc.

When the communication network system using packet switching configured in this way is used, a certain calling terminal device 11 is connected to a called terminal device 12a.

12b or 12c, for example, as shown in FIG. 4, when a call request is output to the called terminal device 12a, a logical link is set for the called terminal device 12a. The number is called from the logical link counter 20 and compared by the comparison calculation unit 21 to see if it is less than the maximum number of logical links set, and the number is called from the called terminal device 12a.
If the number of logical links set is less than the maximum number of logical links set, the called terminal 12a outputs an incoming call acceptance packet, outputs a call request packet, and receives a connection completion packet. The device 11 assumes that the connection is complete and exchanges packets with the called terminal device 12a via the logical link formed.

Further, as shown in FIG. 5, if the number of logical links of the called terminal device 12a has reached the maximum number of logical links,
In accordance with instructions from the main control section 14, the user data editing section 18 retrieves the address of the called terminal device (for example, 12b) having the minimum number of logical link settings from the address storage register 19, and edits the user data.

After editing the user data, a recovery request is made to the calling terminal device 11 that outputs the call request packet from the called terminal device 12a, which rejects the incoming call and adds the user data. Output the packet. The calling terminal device 11 that received the disconnection instruction packet confirms the rejection of the incoming call, outputs a disconnection confirmation packet to the called terminal device 12a, and at the same time outputs a disconnection confirmation packet to the called terminal device 12b as instructed by the user data.
Outputs a call request packet to.

Since the called terminal device 12b that has received the incoming call packet has the minimum number of logical link settings, it outputs an incoming call acceptance packet to the calling terminal device 11 that has output the call request packet. Upon receiving the connection completion packet, the calling terminal device 11 that outputs the call request packet assumes that the connection has been completed and exchanges packets with the called terminal device 12b via the formed logical link.

In this way, in the above embodiment, when a call is made to the called terminal H, 12a, which has the maximum number of logical links set, the called terminal 12b, which has the minimum number of logical links set, is made to call again. By doing so, it is possible to avoid concentration of calls on a specific called terminal device 12a.

The calling side terminal device 11 that is not installed is the called side terminal device 12a, 12b,
12c, no matter which calling terminal device 11 is used, the called terminal device 12a
, 12b, or 12c, it is possible to set up a logical link for any of the subscriber lines connected to the called terminal equipment 12a, 12b, and 12c. Line usage can be easily equalized, improving the efficiency of communication network usage. In addition, the calling terminal device 11 is connected to a specific called terminal device 12a, 1.
2b or 12c, it is not necessary to group the calling terminal devices 11 or change the calling destination address, and the system configuration can be easily changed. .

In the above embodiment, in order to simplify the explanation, a case has been described in which there are nine calling side terminal devices 11 and three called side terminal devices, but in an actual communication network, the calling side terminal devices 11 There are cases where more than one connection is made, and in the above embodiment, this also holds true for these cases, and the calling terminal device 1
Even if it is extended to the case where there are n units of 1 and m number of called terminal devices, the content will be the same.

Further, the contents of the address storage register 19 and the logical link setting number storage register 22 are the called terminal devices 12a and 12b having the minimum number of logical link settings.

Or enter the address of 12c and the number of set logical links, and compare the number of logical links of the called terminal device 12a, 12b, or 12c and each time a call is made, the called terminal that is smaller. Device 12a, 12b, or 12
c may be called again. In this case, the called terminal devices 12a, 12b, and 12c are used in descending order of the number of logical links set up, so that the utilization rate of each of the younger called terminal devices 12a, 12b, and 12c becomes uniform. .

〔Effect of the invention〕

As described above, in the line usage fractionation method in the packet switching of the communication network system that exchanges data via the packet switching fy33 of the present invention, the communication control device 13 is used as the content of user data to Terminal device 12a.

12b, . . . , 12c, the address of the device with the least number of logical link settings can be entered in the reply to the calling terminal device 11, so that the called terminal device 12a, 12b, ....

Alternatively, 12c can make a call if it is a device with a small number of logical link settings. In addition, each called terminal device 12a, 12
b, .

5b,..., 5c can be easily brought into a uniform state of use,
Compared to the conventional communication network system, the called terminal devices 12a, 12b, . . .

12c and subscriber lines 5a, 5b connected thereto.
,..., the utilization efficiency of 5c is improved.

Furthermore, since the calling side terminal devices 11 are not divided into groups, it is easy to change the system, and it is also easy to replace individual terminal devices, reducing time and costs.

[Brief explanation of the drawing]

FIG. 1 is a network configuration diagram according to the method of the present invention, FIG. 2 is a block diagram showing an embodiment according to the method of the present invention,
FIG. 3 is a block diagram showing the communication control device of the embodiment, FIG. 4 is an explanatory diagram of the network communication state showing the logical link settings in the embodiment, and FIG. 5 is the resetting of the logical links in the embodiment. FIG. 6 is a network configuration diagram according to a conventional system. 1...Host computer 3...Packet switching network 5a, 5b,..., 5c...Subscriber line 7...
Subscriber line 11... Calling side terminal device 12... Called side terminal device 13... Communication control device

Claims (1)

[Scope of Claims] In a line use decentralization method in packet switching of a communication network system that exchanges data via a packet switching network (3), the packet switching network (3) is ) and outputs call requests via the packet switching network (3), and grouped subscriber lines (5a, 5b, . . . ).
, 5c) to connect to the packet switching network (3),
A plurality of called terminal devices (12a, 12b, . . . , 12c), and the called terminal device (12a, 12b, . . . , 12c)
) A communication control device (13) that decentralizes logical links that are set up in response to an incoming call.