KR0154615B1 - Searching method of t-s-t switch network channel at isdn switching system - Google Patents

Abstract

The present invention relates to a search method of a T-S-T switch network channel in an integrated information communication network switch, and more particularly, to a search method using a packing method.

The present invention is a channel number that is always determined at the time of searching for an internal channel that is not in use to provide a switching service through the TST switch (1, 2, 3) network in the integrated information communication network switch by applying a packing (packing) method In order to search for unused channels in order, the system can handle high traffic loads and increase the exchange capacity that the switch network can exchange, compared to the conventional sequential or random channel search. It is possible to provide a high level exchange service for call blocking to a user requesting a service, and since there is less call blocking than the conventional method, it has a characteristic effect of handling calls of many exchanges.

Description

A method for searching a T-S-T switch network channel in an integrated telecommunication network switch.

1 is an overall hardware configuration diagram of the present invention.

2 is a general flow diagram of the present invention.

* Explanation of symbols for main parts of the drawings

1, 3: Transmit and receive time switch 2: Space switch

4,5 6: Time and space switch control processor 7: Space switch channel management processor

8: interprocessor communication path

The present invention relates to a search method of a T-S-T switch network channel in an integrated information communication network switch, and more particularly, to a search method using a packing method.

In general, an integrated telecommunication network switch exchanges not only voice but also data such as packet switched data, circuit switched data, and a signal unit of No. 7 common line signaling.

The integrated information network switch uses a T-S-T type switch network consisting of a time switch and a space switch to exchange such data. In this configuration, a transmission time switch for transmitting data and a reception time switch for receiving data are connected through a space switch.

At this time, it is necessary to find a channel that is not in use at both ends of the space switch connecting the transmission / reception time switch. In this process, the maximum amount of traffic that the switch network can handle is determined according to the channel search method.

However, in the case of using a switch network consisting of a combination of a time switch and a space switch, a conventional method of searching for an unused channel across a space switch is as follows.

First, there is a sequential search method. In this case, the last searched channel number is stored when searching for an internal channel that is not in use, and the search is started from the next channel after the last searched channel when a channel search request is requested next. to be. In this case, however, the search time is reduced when the traffic is low, but when the traffic is high, the search often occurs.

Therefore, there is a problem that the exchange service is provided with a low grade of service for call blocking to subscribers requiring exchange.

Second, there is a random channel search method. In this method, the channel search starts from a random channel. First of all, it is difficult to generate a random number for determining a channel to start channel search in the exchange in realization of this method. Next, when high traffic is applied to the exchange, the search fails with a high probability.

As described above, when the high traffic is applied to the exchange, the traffic processing capacity that the exchange can handle is reduced to the maximum, and the user who requests the exchange service has a problem of providing a low-grade service in terms of call blocking. have.

Therefore, the present invention devised to solve the problems of the prior art, the traffic processing capacity is maximized, the exchange function of the exchange is possible even when there is a high call traffic in the exchange, and the subscribers to the call blocking Its purpose is to provide a method of searching for channels that provide a high level of service.

In order to achieve the above object, in the present invention, in order to provide an exchange service through a TST switch network in an integrated information communication network switch, the unused channels are sequentially ordered starting from the channel number determined at the time of searching for an unused internal channel. Search. Blocking occurs when searching for channels because the physical path connecting the transmit / receive time switch and the space switch is used, i.e., when only one highway is in use on either the sending highway or the receiving highway, or both. Is generated. However, in the present invention, since the channels being used are concentrated in the vicinity of the determined channel number, the probability that there are no channels being used in the target highway is increased.

In addition, a packing method is a method in which a traffic load is further applied to a channel that is likely to be used. In such a search method, the more the number is away from the channel number at which the channel search is started, the greater the probability that it is not in use. Therefore, the probability that the search succeeds during the unused channel search increases. The channel number from which the channel search is started uses the smallest channel number or the largest channel number in the corresponding highway.

Accordingly, the present invention provides a time switch control processor for controlling a transmission time switch, a space switch connected to the transmission time switch by an exchange path, a reception time switch connected by the transmission time switch to an exchange path, and a time switch control processor which controls the transmission / reception time switch. And a space switch control processor for controlling the space switch and a space switch channel management processor having a space switch channel management processor connected through the communication network between the control processors and the processor. A first step of receiving a serial number of a transmission time switch and a transmission and reception highway number that is a serial number of a reception time switch when a channel search request is in use from a processor requesting an exchange path; The second step of setting the number to '0' and the corresponding In the third step of checking whether the null is being used in the transmission and reception highway, and if the result of the inspection in the third step is not in use, the searched channel is marked as being used in the transmission and reception highway usage management table. In the fourth step of sending success to the processor requesting channel search, and the result of the check in the third step, if the corresponding channel is using the transmission or reception highway, the number of searches is increased by one, and the number of searches is increased for each search. The fifth step of searching all the way from the highway to the last channel, and performing the processing of the fourth step if a channel that is not in use is found in the searching process until the search frequency is completed and the searching channel is the last. If the number of scans is filled or the last channel is used up, the processor that requested the channel search has failed. It was to be carried out by a sixth step of sending.

Hereinafter, with reference to the accompanying drawings will be described an embodiment of the present invention;

1 is an overall hardware configuration to which the present invention is applied.

In the hardware to which the present invention is applied, as shown in the figure, the time switches 1 and 3 and the space switch 2 are combined to form a T-S-T (time-space-time) switch network. The time switches 1 and 3 and the space switch 2 have control processors 4, 5 and 6, respectively. In addition, there is a processor 7 that manages the use state of the spatial switch channel and is responsible for searching and managing unused channels to provide exchange services. Each processor is connected by an interprocessor communication path 8.

The space switch channel management processor 7 searches for available space switch channels and sends connection information to the space switch control processor and the time switch control processor, respectively, to connect the space switch and the time switch. In this way, an exchange path through the T-S-T switch network is formed to provide an exchange service.

2 is an overall flow chart according to the present invention, the processing procedure according to the present invention with reference to the drawings in detail as follows.

When there is an unused channel search request, a serial number of the transmission time switch 1 that transmits data to be exchanged first, that is, a transmission highway number, is received from the processor requesting the switching path (201).

Next, the receiver 202 receives the serial number of the reception time switch 3 that receives the exchanged data, that is, the reception highway number from the processor requesting the switching path. The number of searches is set to '0' (203).

The channel number to start searching in the transmission / reception highway is set to '0' so that the search starts from the channel number '0' whenever there is a channel search request (204).

Then, the usage state of the transmission and reception highways of the corresponding channel is read from the usage state management table (205), and it is checked whether it is in use in the transmission highway or the reception highway (206).

If all are not in use, the searched channels are marked as in use in the transmit / receive highway usage state management table (207), sent to the processor requesting channel search (208) that the search was successful, and the search is completed.

However, in the process 206 of checking whether the transmission highway or the reception highway is in use, if the channel is busy, the transmission or reception highway is increased by one search count (209), and it is checked whether the total search count has been exceeded. 210).

If the total number of searches is exceeded, the search is considered to be failed, and the processor that requested the channel search is notified of the search failure (211). However, if the total number of searches has not been exceeded, the search channel number is increased by one (212), and it is checked whether all the channels are searched up to the last channel (213).

If the last channel has been searched, the processor that informs the channel search request of the search failure is notified 214, and the search ends. If the last channel has not been detected, the process returns to step 205 of checking whether the transmission channel or the receiving highway is in use and repeats the process of checking the use status of the channel.

Meanwhile, although the present invention has described a method of increasing one by one starting from the smallest number in the channel number of the corresponding highway, a method of decreasing one by one starting from the largest number in the corresponding highway can also be used.

Accordingly, the present invention as described above, when searching for a channel in use at the same time across the space switch connecting the transmission time switch and the reception time switch to provide a switching service through the TST switch network. First, it can handle high traffic load compared to the conventional sequential search method or random channel search method. Second, it is possible to increase the exchangeable exchange capacity that can be switched by the switch network. It can provide a high level of exchange service for blocking. And fourthly, since there is less call blocking than the conventional method, it has a characteristic effect that can handle calls of many exchanges.

Claims (3)

A transmission time switch 1, a space switch 2 connected to the transmission time switch 1 in an exchange path, a reception time switch 3 connected to the transmission time switch 1 in an exchange path, and the transmission / reception time A time switch control processor 4 and 6 for controlling the switches 1 and 3, a space switch control processor 5 for controlling the space switch, and a space connected through the communication network between the control processors and the processor 8 A method for searching a switch network channel applied to an integrated telecommunication network switch having a switch channel management processor (7), wherein the serial number of the transmission time switch (1) and the reception time switch when there is an unused channel search request. A first step of receiving a transmission and reception highway number which is the serial number of (3) from a processor requesting an exchange path, a second step of setting the number of retrieval and the start channel number to '0'; In the third step of checking whether the corresponding channel is in use in the transmission and reception highway, and if the result of the inspection in the third step is not in use, the detected channel is marked as being used in the transmission and reception highway usage status management table. A fourth step of sending a successful search to the processor requesting channel search; and a result of the check in the third step, if the corresponding channel is using a transmission or reception highway, the number of searches is increased by one, and the number of searches is increased for each search. The fifth step of searching all the channels from the highway to the last channel, and the process of the fourth step if a channel not being used is found in the process of searching until the number of searches is completed and the search channel is the last. If the number of scans is filled up or the last channel is used, the search failed. And a sixth step of sending it to the processor. The method of claim 1, wherein the channel search in the third to sixth steps is performed by reducing the channel number by one and searching for an unused channel by setting the channel number to start searching as the largest number in the corresponding highway. A search method for a switch network channel in an integrated telecommunication network switch. The method of claim 1, wherein the channel search in the third to sixth steps is performed by increasing the channel numbers one by one and searching for a channel that is not in use by setting the channel number to start searching as the smallest number in the corresponding highway. A search method for a switch network channel in an integrated telecommunication network switch.