JPH04316167A - Communication network designing method aided by computer - Google Patents

Abstract

PURPOSE:To prepare a realistic communication network expanding plan which takes a restriction imposed by an already existing communication network into account without making any already existing line unnecessary in the designed network. CONSTITUTION:This communication network designing method is composed of Step 11 in which the minimum and maximum numbers of lines are designated between exchanges constituting a communication network, Step 12 in which the number of lines set between the exchanges is calculated based on the traffic amount, call loss probability rule, or investment cost between the exchanges, and Step 13 in which whether or not the number of lines calculated in Step 12 is smaller than the minimum number of lines designated in Step 11 is discriminated. The method also has Step 14 in which the set number of lines is changed to the minimum number of lines designated in Step 11 when the set number is discriminated as smaller in Step 13 and Step 15 in which it is discriminated whether or not the number of lines calculated in Step 12 is larger than the maximum number of lines designated in Step 11 when the set number is discriminated as not smaller in Step 13, and Step 16 in which the set number of lines is changed to the maximum number of lines designated in Step 11 when the set number is discriminated as larger than the maximum number in Step 15.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a computer-assisted communication network design method for designing equipment constituting a communication network using a computer.

0002

[Background Art] Conventionally, computer-aided communication network design is based on the traffic volume between exchanges composing a communication network, the call loss rate regulations for a group of lines, or the investment cost required to set up lines between these exchanges. The method used was to design only those parts. FIG. 2 is a flowchart showing the processing procedure of a conventional computer-aided communication network design method. In this method, first, data specifying design conditions are input (step 21), then a network is designed according to the design conditions (step 22), and then the design results are output (step 23).

0003

SUMMARY OF THE INVENTION In the above-mentioned conventional computer-aided communication network design, existing lines are not taken into consideration, so the number of lines may be designed to be smaller than the number of existing lines. In this case, there is a problem in that either part of the existing line must be removed, or the unused existing line must be kept as surplus equipment.

[0004] Furthermore, in conventional computer-aided communication equipment design, restrictions on line expansion are not taken into consideration.
The problem of designing the number of lines that require additional lines between exchanges where line expansion is difficult or undesirable, or designing a number of lines that is larger than the limit between exchanges where line expansion is restricted. There was a point.

[0005]

[Means for Solving the Problems] A computer-aided communication network design method of the present invention is a computer-aided communication network design method for designing equipment constituting a communication network using a computer, in which an exchange constituting the communication network is designed. a first step of specifying the minimum number of lines between the exchanges; and a first step of specifying the minimum number of lines between the exchanges, based on the traffic volume between the exchanges and the call loss probability provisions of the line group or the cost required to set up the lines between the exchanges. a second step of calculating the number of lines to be set;
a third step of determining whether the number of lines calculated in the second step is smaller than the minimum number of lines specified in the first step; and if it is determined to be smaller in the third step; and a fourth step of changing the number of lines set between the switching stations to the minimum number of lines specified in the first step, and the computer-aided communication network design method of the present invention includes: The first step is to specify the maximum number of lines between the exchanges, and if it is determined in the third step that the number is not smaller, the number of lines calculated in the second step is specified in the first step. a fifth step of determining whether the number of lines is greater than the maximum number of lines specified in the first step; and if it is determined in the fifth step that the number of lines is greater than the maximum number of lines specified in the first step; The configuration may also include a sixth step of changing the number of lines to the maximum number of lines.

[0006]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, the present invention will be explained with reference to the drawings.

FIG. 1 is a flowchart showing the processing procedure of an embodiment of the present invention. In the following, a case where existing lines exist between exchanges constituting a communication network and a case where line expansion is difficult or restricted will be explained as examples.

As a first example, a case will be explained in which there is an existing line between exchanges. First, the number of existing lines between exchanges is designated as the minimum number of lines (step 11). Next, the number of lines to be set up between the exchanges is calculated based on the traffic volume between the exchanges and the call loss rate regulations for the line group or the cost required to set up the lines between the exchanges (step 12).
). The number of lines calculated in step 12 is compared to see if it is smaller than the minimum number of lines specified in step 11 (step 13), and if it is determined to be smaller, the number of lines to be set between exchanges is The number of lines is changed to the minimum number specified in step 11 (step 14).

On the other hand, if it is determined in step 13 that it is not smaller, and the maximum number of lines between exchanges is not specified in step 11, the number of lines calculated in step 12 is the number of lines set between exchanges. Become.

[0010] As a second example, a case will be explained in which there is an existing line between exchanges and it is difficult or restricted to add the line. First, the number of existing lines between exchanges is specified as the minimum number of lines, and if it is difficult to add lines, the number of existing lines is specified as the maximum number of lines, and if line expansion is restricted, the upper limit is specified. The number of lines is designated as the maximum number of lines (step 11). Next, the number of lines to be set up between the exchanges is calculated based on the traffic volume between the exchanges and the call loss rate regulations for the line group or the cost required to set up the lines between the exchanges (step 12). The number of lines calculated in step 12 is compared to see if it is smaller than the minimum number of lines specified in step 11 (step 13), and if it is determined to be smaller, the number of lines to be set between exchanges is set in step 11. The number of lines is changed to the minimum number specified in (step 14).

On the other hand, if it is determined in step 13 that it is not smaller, it is compared whether the number of lines calculated in step 12 is greater than the maximum number of lines specified in step 11 (step 15), and it is determined that it is larger. If so, the number of lines set between exchanges is changed to the maximum number of lines specified in step 11 (step 16). Also, step 1
If it is determined in step 5 that the number is not large, the number of lines calculated in step 12 becomes the number of lines set between the exchanges.

[0012] As a result of these processes, if it is difficult to add more lines, the number of existing lines can be specified as both the minimum number of lines and the maximum number of lines in step 11, regardless of the calculation result in step 12. The number of lines set in between is the number of existing lines. In this case, overflow traffic and call loss probability for the number of designed lines are calculated, and the influence on other parts of the communication network is reflected in the design.

[0013]

As explained above, in the present invention, the number of existing lines between exchanges is taken into account as the minimum number of lines, and the number of lines is designed to exceed the number of existing lines, so that the design always uses the existing lines. As a result, unnecessary existing lines are not created,
This has the effect of eliminating the need for construction work such as the removal of part of the existing line, and also eliminating the uneconomical effects of retaining unused existing lines as surplus equipment.

[0014] Furthermore, since the number of lines is designed to be less than the maximum number of lines in consideration of the maximum number of lines that can be set up between exchanges, if it is difficult, undesirable, or restricted to increase the number of lines, the upper limit is set. By specifying the number of lines as the maximum number of lines, the number of lines is always less than or equal to the maximum number of lines. In other words, the present invention has the effect that it is possible to formulate a realistic communication network expansion plan in consideration of the constraints of the existing communication network.

[Brief explanation of drawings]

FIG. 1 is a flowchart showing a processing procedure of an embodiment of the present invention.

FIG. 2 is a flowchart showing the processing procedure of a conventional computer-aided communication network design method.

Claims (2)

[Claims] 1. A computer-aided communication network design method for designing equipment constituting a communication network using a computer, comprising: a first step of specifying a minimum number of lines between exchanges constituting the communication network; a second step of calculating the number of lines to be set up between the switching offices based on the traffic volume between the switching offices and the call loss probability regulation of the line group or the cost required to set up the lines between the switching offices; a third step of determining whether the number of lines calculated in step 2 is smaller than the minimum number of lines specified in the first step; and if it is determined to be smaller in the third step, the exchange a fourth step of changing the number of lines set between stations to the minimum number of lines specified in the first step. 2. If it is determined in the first step of specifying the maximum number of lines between the exchanges and the third step that the number of lines is not smaller than the maximum number of lines calculated in the second step, the number of lines calculated in the second step is a fifth step of determining whether the number of lines is greater than the maximum number of lines specified in step 1; and if it is determined in the fifth step that the number of lines is greater than the maximum number of lines specified in step 1; 2. The computer-aided communication network design method according to claim 1, further comprising a sixth step of changing the number of lines to the maximum number specified in step.