CS245336B1 - Traffic load's dynamic distribution connection in through-trunk exchange - Google Patents

Description

The aim of the solution is a circuit for dynamic distribution of traffic load in the transit central, which allows dynamic distribution of traffic load into individual directions depending on changing traffic conditions in the inter-telephone network.

The essence of the solution is a circuit for dynamic distribution of the traffic load in the transit central, consisting of a control block (RB), on the outputs of which the windings of the relays (S 1) to (S 5) are connected. contacts (vl 1, vr 1), break contact (s 2) is connected between make contacts (vl 2, vr 2), break contact is connected between make contacts (knows 3, vr 3), break contact is connected between make contacts (vl 4, vr 4), the break contact (s 5) is connected between the make contacts (vl 5, vr 5), located in the test circuits of the individual alternate directions interconnected by contacts (tv 1) to (tv 5).

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The invention relates to a circuit for dynamic distribution of traffic load in a transit telephone exchange, enabling, in contrast to a static control, to distribute traffic loads to individual bypasses depending on changing traffic conditions in interconnecting bundles and for momentary operational state in the interstage telephone network. predefined criteria selected the most advantageous connection.

With static traffic load distribution enabled by 2nd generation linking systems, the bypass route search program is fixed, programmed when the control panel is installed. The search order of the bypasses is given and does not depend on the changing operating conditions in the bundles. This is one of the basic drawbacks of static control, and that, in the case of establishing a connection via a bypass, the control has no information about the status of the other connection bundles through which the connection would not pass very slowly. As a result, unnecessary staffing and central management bodies may become central.

Dynamic load distribution removes these shortcomings. The proposed connection allows to implement such a dynamic load distribution algorithm that will be able to locate unused portions of the load transfer slot that overload other parts of the network. The proposed engagement will ensure an increased and more even use of costly technical means of the inter-intensity telephone network, thus making it more economical. The network with dynamic load distribution in case of emergency situations and sudden overloading of certain parts of the network has significant advantages, when the network provides the demand even in these extreme situations! quality of telephone traffic.

The principle of the traffic load distribution algorithm implemented by the proposed circuit is that, based on the instantaneous number of channels currently occupied in the interstage splice bundles, the control block selects only one of the most advantageous bypass routes available for incoming calls to that direction. Alternatively, the directions, except for the direct direction, are inaccessible to incoming calls in a given operating situation. When the operating situation in the respective coupling bundles changes, the selection of the most advantageous bypass is repeated and the selected alternative direction can be changed.

Advantage of the described method of traffic load distribution is that the control block does not need to identify the directional sign of the target control panel, requires minimal intervention in the existing control panel and in case of failure of the control block the control panel automatically switches to flooding static distribution. For all known principles of dynamic load distribution, used only in program-controlled switching systems, the search for a suitable bypass begins only after the identification of the incoming call sign.

In FIG. no. 1 is a schematic diagram of the current static load distribution. In FIG. no. 2 is a circuit diagram for dynamic load distribution as well as its implementation in the control panel.

The circuit for dynamic load distribution consists of the control block RB, to the outputs of which the windings of the relays S1 to S 5 are connected, their break contact s 1 being connected between normally open contacts vl 1, vr 1, break contact s 2 being connected between normally closed contacts vl 2, vr 2, break contact is connected between make contacts vl 3, vr 3, break contact is connected between make contacts vl 4, vr 4, break contact is connected between vl 5, vr 5, located in the test circuits of the alternate directions interconnected by contacts tv 1 to tv 5 and containing the relay windings TV 1 to TV 5.

The function of the circuit in question is as follows:

Control block RB based on operating status information, i. j. According to the selected criteria, it selects the most advantageous direction, which is realized by attracting those relays S 1 to S 5, which in the given operating situation belong to an undesirable alternative direction. The break contacts 1 to 5 belonging to the respective relay S 1 to S 5 open the test circuit of all undesirable alternative directions and only one most advantageous alternative direction remains available for incoming calls to this direction. The process of selecting the most advantageous bypass is repeated when the operating situation in the splice bundles changes.

If there is a direct route to the target exchange, the proposed connection takes into account the priority of the direct route.

In the event of a fault condition of the control block RB, no current flows through any of the relays S1 to S5, as a result of which their break contacts 1 to 5 are put into a normally closed state and the control panel automatically reverts to the original static principle load distribution.

Claims (2)

Circuit for dynamic distribution of traffic load in a transit telephony central unit, characterized in that it consists of a control block (RB J, at the outputs of which the windings of the relays (S 1) to (S 5) are connected, connected between make contacts (vl 1, vr 1), break contact (s 2) is connected between make contacts (vl 2, vr 2), INVENTION make contact (s 3) is connected between make contacts (vl 3, vr 3) , break contact (s 4) is connected between make contacts (vl 4, vr 4j, break contact (s 5) is connected between make contacts (vl 5, vr 5J), located in the test circuits of the alternate directions interconnected by contacts (tv) 1) to (tv5).