JPH0451640A - Setting system for subscriber call restriction level - Google Patents

Abstract

PURPOSE:To speedily set a restriction level by supervising and measuring plural pieces of restriction level setting cause information, weighting and averaging the values of plural pieces of restriction level setting cause information and setting it to a restriction level value which is previously decided in correspondence with the total value of the weighted and averaged values. CONSTITUTION:A central controller CC provided for an exchange system supervises and measures a CC use rate X% showing the operation conditions of CC being restriction level setting cause information for restricting a call, a DT connection delay rate Y% showing connection allowable time till a dial tone is transmitted to a caller lifting a receiver and an ORT block rate Z% showing the acquiring state of a trunk receiving numerical information from the caller. The three causes which are measured at every minute are weighted (a)-(c) and a weighted average value M=aX+bY+cZ is obtained. The central controller CC decides one of the restriction level value which is previously decided in correspondence with the total value of the weighted and averaged values and sets the subscriber call restriction level. Thus, the restriction level can speedily be decided.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a subscriber call restriction level setting system for restricting subscriber calls when a switching system is overloaded.

[Conventional technology]

Traditionally, when setting subscriber call restriction levels in switching systems,
When the switching system becomes overloaded, only the usage rate of the central control unit provided in the switching system is monitored to restrict calls by subscribers, and a restriction level is determined and set. In other words, the threshold value of the central controller usage rate and the duration of that state are predetermined, and the subscriber's call restriction is applied when the central controller usage rate is equal to or higher than the threshold value and for a predetermined period of time. The regulation level is activated when the regulation is maintained, and the regulation level is raised each time the predetermined state is maintained.

[Problem to be solved by the invention]

As mentioned above, in the conventional subscriber call restriction level setting,
The regulation level is determined and set only based on the usage rate of the central control unit, and since this usage rate fluctuates widely, it is necessary to average it over a long period of time. Therefore, there is a problem in that it takes time for the subscriber to activate call restriction and raise the restriction level.

SUMMARY OF THE INVENTION An object of the present invention is to provide a subscriber call restriction level setting method that can quickly determine and set a restriction level by taking into account fluctuations in the usage rate of the central control unit.

[Means to solve the problem]

The subscriber call restriction level setting method of the present invention monitors and measures a plurality of restriction level setting factor information in the switching system in a subscriber call restriction level setting method that restricts subscriber calls when the switching system is overloaded. The configuration is such that the values of the plurality of restriction level setting factor information within a predetermined time are weighted averaged, and a predetermined restriction level value is set in accordance with the total value of the weighted averaged values.

〔Example〕

Next, embodiments of the present invention will be described with reference to the drawings.

FIG. 1 is a diagram for explaining one embodiment of the present invention.

Central control unit (CC/Centr) for the exchange system
al Control) is the restriction level setting factor information for call restriction, the CC usage rate indicating the operating status of CC, and the dial tone (DTDial) for the caller who picks up the handset.
DT connection delay rate indicating the allowable connection time until sending Tcne) and the trunk (which receives numerical information from the calling party).
ORT: Originating Register
Monitor and measure three ORT block rates that indicate the acquisition status of the Trunk. The method of setting the subscriber call restriction level will be explained below.

The CC usage rate is measured every minute, and its average value is defined as X%. Next, the DT connection delay rate is determined by setting the allowable connection time as 3 seconds, and failure to connect within this 3 seconds is considered a failure. Measurements are made every 5 seconds, and the average value of the failure rate for one minute is defined as Y%. do. The next ORT block rate is defined as a failure when all RTs are in use and cannot be captured, and is measured every - minute, and the average value of the failure rate is 7%. These three factors, CC usage rate, DT connection delay rate, and ORT block rate, are weighted a, b, and C, respectively, to obtain a weighted average value M=aX+bY+cZ. By setting a plurality of determination conditions in this way, it is possible to avoid erroneous determinations and lower the risk rate, and it becomes possible to perform determinations in a short time.

Then, the central control device determines a predetermined regulation level value of 25%, 50%, 75%, or 100% corresponding to the total value of the weighted average values as shown in Figure 1. Set subscriber call restriction level.

〔Effect of the invention〕

As explained above, the present invention monitors and measures a plurality of regulation level setting factor information, weights the average of the plurality of regulation level setting factor information, and predetermines a value corresponding to the total value of the weighted average values. By configuring the control level to be set to the specified control level value, it is possible to quickly determine and set the control level while taking into account fluctuations in the usage rate of the central control unit.

[Brief explanation of drawings]

FIG. 1 is a diagram for explaining one embodiment of the present invention.

Claims (1)

[Claims] In a subscriber call restriction level setting method that restricts subscriber calls when a switching system is overloaded, a plurality of restriction level setting factor information in the switching system is monitored and measured, and the plurality of restriction levels are set within a predetermined time. 1. A subscriber call restriction level setting method, characterized in that values of factor information are weighted averaged, and a predetermined restriction level value is set in accordance with the total value of the weighted average values.