SU834942A1 - Method of calling subscriber - Google Patents

Description

(54) METHOD OF CALLING THE SUBSCRIBER

one

The invention relates to a switching communication technology and can be used to form repeated calls from automatic dialing devices.

There is a known method of calling a subscriber, which includes transferring a call, receiving a Zanto signal, forming repeated calls and forming an interval between repeated calls.

The disadvantage of this method is the avalanche-like loading of the switching network by repeated call flows due to automatic redialing by automatic dialing devices, especially if the subscriber is busy.

The purpose of the invention is to reduce the load on the switching network by limiting the number of repeated calls.

This goal is achieved by the fact that in the method of calling a subscriber, consisting in transferring a call, receiving a Zan signal, forming repeated calls and forming an interval between repeated calls, simultaneously with forming repeated calls that form a series,

a call in a switching network according to the criterion of permissible probability of employment corresponding to a given number of repeated calls in a series; moreover, after receiving a signal,

0 according to the average length of the connection.

When organizing re-calls are guided by the following order.

Initially, several attempts were made to establish a connection (a series of attempts) immediately following each other, after which it is accepted that the call does not go through because of the establishment of the put / her set

0 connections After that, a break is made (in attempts to establish a connection), corresponding to the average time the subscriber is busy. Then follows a new series of attempts.

five

With this method of establishing the connection, the main parameters are: the time interval for each attempt to establish the connection of the following directly

after another v; the number of retries (including primary) in a continuous series of attempts K; time interval between series.

The first and third parameters are determined mainly by the principle of imitation of the subscriber and are respectively 20 seconds and 4 minutes. It is permissible to reduce the first pair of meter to a value of 2 s, i.e. to a value that takes into account the speed of release of the first service switching device.

The second parameter is determined by the output from the static network parameters and takes into account the probability of the primary call. In addition, a probabilistic criterion is determined for the path of the connection establishment. For example, if the probability of loss of the primary call is P 0.35 and the assigned occupation probability by establishing a connection (K) 5-10, the number of retries in a series should be K 5.

The proposed method of calling a subscriber facilitates the task of the subscriber and reduces the load on the switching network from repeated calls.

Formula of invention

.The method of calling the subscriber, which consists in transferring the call, receiving a busy signal, forming a repeated call and forming an interval between repeated calls, is necessary so as to reduce the load on the switching network by limiting the number repeated calls, simultaneously with the formation of repeated calls, which form seri vt ,. determine the location of the call in a switching network by the criterion of permissible occupancy probability corresponding to a given number of repeated calls in a series; moreover, after receiving a signal of Occupation. batches are selected according to the average duration of the connection.

Sources of information taken into account in the examination

1. Australian Patent I 921373, class H 04 M 1/27, 1975.

Claims (1)

Claim A method of calling a subscriber, consisting in transferring a call, receiving a busy signal, generating retry calls, and setting up an interval between repeated calls, so that, in order to reduce the load on the switching networks by limiting the number of repeated calls, simultaneously with the formation of repeated calls, which are formed by series, determine the place of missed call in the switching network according to the criterion of acceptable probability of employment corresponding to a given number of repeated calls in a series, and after receiving the signal “Busy” ^1. form the interval between series of repeated calls corresponding to the average time of busy, and the interval between calls in the series is selected in accordance with the average duration of the connection.