KR100325134B1 - A method for increasing capacity of switching system - Google Patents

Abstract

The present invention relates to a method of increasing switching capacity of a switch system, which is connected to a plurality of lines, each of which is unspecified in a transmission equipment, and is used to be connected to a specific counterpart. In the switching capacity expansion method of the switch system that can increase the capacity by 1.5 times or 2 times by a second, in the line extension method of the cross-network type switching system consisting of the first stage, the second stage and the third stage, In the first stage, a logical switch element is applied to output three channels of signals by receiving three channels of signals. In the second stage, a logical switch element is used to output two channels of signals by receiving two channels of signals. Expansion capacity of switching system that uses logical switch element that outputs 3 channel signal by receiving 6 channel signal It can be expanded to 1.5 times or 2 times the current channel capacity in consideration of the increasing channel environment, thus providing a method for reducing the cost and constructing a switching system suitable for the channel environment. It has an effect.

Description

Capacity expansion method of switching system {A METHOD FOR INCREASING CAPACITY OF SWITCHING SYSTEM}

The present invention relates to a method of increasing switching capacity of a switch system, which is connected to a plurality of lines, each of which is unspecified in a transmission equipment, and is used to be connected to a specific counterpart. The present invention relates to a switching capacity expansion method of a switch system capable of increasing capacity by 1.5 or 2 times.

Unlike switching devices used in general exchanges, line distribution devices or switching devices used for line connection in transmission equipment are blocked due to blocking caused by the lack of connectable lines, even though there are available communication channels. In order to reduce the chance of loss of communication, a switching configuration using a three stage close network method is used.

Hereinafter, a configuration of a cross network according to the prior art will be described with reference to the accompanying drawings.

1 is a block diagram illustrating a general cross network of the prior art, FIG. 2 is a block diagram of a four-channel cross network switch according to an embodiment of the prior art, and FIG. 8 is a cross-network switch configuration expanded to eight channels according to an embodiment of the present invention.

Referring to FIG. 1, when the total capacity N of the cross-network switching system and the number of channels n input to the switch are given, the switch configuration of the first stage 10, which is an input terminal, is a switch of n * 2n capacity. Is composed of N / n, and the second stage 20, which is a connection end of the line, has 2N switches of N / n * N / n capacities, and the third stage 30, which is an output terminal, has a capacity of 2n * n capacities. The switch is composed of N / n pieces and has a symmetrical structure with the first stage.

In the above structure, when the channel to be communicated is N, the first stage includes a switching element having a capacity of n * 2n, and N / n switching elements obtained by dividing the channel capacity N by the input capacitance n of the switching element. In the second stage, 2N switching elements having N / n * N / n capacities are required, and the third stage has a symmetrical structure with the first stage, and 2N channels for communication are required, so the first stage is an input stage. The stage 10 and the third stage 30 as the output stage need only N lines each, and the second stage 20 requires 2N communication lines, which are multiples of the number of communication channels.

Therefore, a sufficient number of communication lines can be secured compared to the number of communication channels, thereby preventing blocking due to lack of lines.

The cross-network switch of the four channel capacity according to the embodiment of the prior art will be described with reference to the attached FIG.

Since the channel for communication is four channels, N = 4, and the first stage 11, which is an input terminal, is composed of two 2 * 4 switching elements that receive two channel signals and switch to four channel outputs. The second stage 21 constituting the line is composed of four 2 * 2 switching elements that receive two channels of signals and output the signals of two channels. This structure is symmetrical with stage (11), and consists of two 4 * 2 switching elements that receive signals from four channels and output them to two channels.

Therefore, since four communication channel signals can be transmitted through eight communication paths, a blocking phenomenon due to a line problem does not occur.

Referring to FIG. 3, a cross network switch of capacity expanded to eight channels will be described as another embodiment of the prior art.

Since the channel for communication is 8 channels, N = 8, and the first stage 12, which is an input terminal, is composed of four 2 * 4 switching elements that receive two channel signals and switch to four channel outputs. The second stage 22 constituting the line is composed of eight 2 * 2 switching elements that receive two channels of signals and output the signals of two channels, and the third stage 32 as an output stage has a first As a structure symmetrical with stage 12, four 4 * 2 switching elements receiving four channels of signals and outputting them to two channels are configured as four, and eight channel signals are transmitted through 16 transmission paths. .

In the above, the first stage 12, which is an input stage, and the third stage 32, which is an output stage, are illustrated as using two 2 * 4 switches, but two 4 * 8 switches may be used, and FIG. * 8 One switch can be used.

In this case, the following logical concept is introduced. As shown in FIG. 2, when the total channel capacity is 4 channels, the switch of the first stage 11 uses one 4 * 8 switch. , As if using two 2 * 4 switches. In addition, as shown in FIG. 3, when the total channel capacity is eight channels, the switch of the first stage 12 displays as if four 4 * 8 switches are used while using two 4 * 8 switches. .

This indicates that the switch control of the input stage and the output stage is limited to 2 * 4 or 4 * 2, and that the second stage uses the 2 * 2 switch as it is.

Therefore, the conventional technique as described above has a problem in that when the capacity is increased because the switch of the input and output stage is limited to 2 * 4 or 4 * 2, it should be doubled.

Particularly, as a specific embodiment, the capacity of the switching line currently has a problem in that the 4,000 lines need to be operated with 8,000 lines in which 4,000 lines are added for the addition of one line.

In other words, if the capacity of the entire switching system initially required N capacity, but later one additional line is needed, the conventional technique as described above had to increase the capacity of N additionally. There is a problem in that N lines need to be increased by 2 ⁿ times for the additional use of 1 line without using.

The invention that is to provide a way to have, as the prior art, as that according as the capacity to cross the network system switching system, without expansion times 2 ^n, 1.5 times can be expanded, and flexibility to the line extension Purpose.

In order to achieve the above object, the present invention provides a circuit extension method of a cross-network switching system including a first stage, a second stage, and a third stage, wherein a signal of three channels is applied to the first stage. A logical switch element that receives 6 channels of signals and outputs two channels of signals to the second stage, and uses a logical switch element that outputs two channels of signals to the second stage, and a six-channel signal for the third stage. It is characterized in that the capacity expansion method of the switching system using a logical switch element that outputs a three-channel signal by receiving a.

1 is a block diagram showing a general cloth network of the prior art,

2 is a block diagram of a four-channel cross-network switch according to an embodiment of the prior art,

3 is a diagram illustrating a cross-network switch extended to eight channels according to an embodiment of the prior art;

4 is a configuration diagram of a four-channel switching system of a cross network method according to an embodiment of the present invention;

5 is a configuration diagram of a six-channel switching system of a cross network method according to an embodiment of the present invention;

6 is a configuration diagram of a 12-channel switching system of a cross network method according to an embodiment of the present invention.

Explanation of symbols on the main parts of the drawings

10,11,12,13,14,15: first stage 20,21,22,23,24,25: second stage

30,31,32,33,34,35: Third stage 40: Additional placement part

Hereinafter, a capacity expansion method of a switching system according to an embodiment of the present invention will be described with reference to the accompanying drawings.

4 is a configuration diagram of a cross-channel 4-channel switching system according to an embodiment of the present invention, and FIG. 5 is a cross-sectional view of a cross-network method according to an embodiment of the present invention. 6 is a configuration diagram of a channel switching system, and FIG. 6 is a configuration diagram of a 12-channel switching system of a cross network method according to an embodiment of the present invention.

Referring to the switching system according to the configuration of the present invention as described above with reference to the accompanying drawings, in the line extension method of the cross-network switching system composed of the first stage, the second stage and the third stage,

In the first stage, a logical switch element is used to receive a three-channel signal as an input channel signal and outputs a six-channel signal, and the switch element receives a two-channel signal and outputs a four-channel signal. It can also be used as an in-switching element, the number used is the number of channel capacity N of the switching system divided by the number of input channels of the logical switching element,

In the second stage, a logical switch element that receives two channels of signals and outputs two channels of signals is used, and the number used is N, which is the channel capacity of the switching system.

In the third stage, a logical switch element is applied to output a six channel signal by receiving a six-channel signal, and the switch element is a logical switching element that outputs two channels of signal by receiving a four-channel signal. May also be used, and the same number as the switching elements used in the first stage is used,

The logical switching elements used in the first and third stages are sequentially connected to the switching elements physically arranged in the second stage.

Hereinafter, the operation of the configuration as described above will be described in detail with reference to the accompanying drawings.

As shown in FIG. 4, the 4 * 4 channel cross-network switching system according to an embodiment of the present invention receives three channel signals as an input signal at the first end 13, Two 3 * 6 logic switch elements that output channel signals are used, and only two channel signals are input to use them as 2 * 4 logic switch elements.

Four 2 * 2 logic switch elements are used for the second stage 23 to receive signals of two channels and output two channels of signals. The third stage 33 receives six channel signals as an input signal. By using two 6 * 3 logic switch elements for outputting three channel signals, and inputting only four input signals to each logical element of the third stage 33 and outputting only two channel signals. The switch elements of the first stage 13 and the third stage 33 operate like 2 * 4 and 4 * 2 logic switch elements, thereby forming a four-channel cross-network switching system.

At this time, when one channel is additionally required, as shown in FIG. 5, a three-channel signal is applied to the input of the 3 * 6 logic switch of the first stage 14, and a 2 * 2 logic switch is applied to the second stage. Two additional arrangements (40), each connected to each of the logic switches of the first stage, and the output of the logic switch installed in the second stage of the additional installation (40), 6 * 3 of the third stage (34). It is connected to each of the logic switch inputs and uses all three channels of output signals.

Therefore, since it is possible to make a 6-channel switching system of 1.5 channel expansion of 4 channels, it is not necessary to make an 8 channel switching system of 2 ⁿ times channel expansion as in the conventional situation where one channel expansion is needed.

As another embodiment of the present invention, as shown in FIG. 6, in the case of the 12-channel switching system, which is a 1.5 times channel expansion switching system of the 8-channel switching system, the first stage 15 may have 3 * as shown in FIG. By using four 6 logic switch elements, 12 2 * 2 logic switch elements in the second stage 25, and 4 6 * 3 logic switch elements in the third stage 35, 12 channels of cross-network switching system can be configured.

4 to 6 are shown as dashed lines in FIG. 4 to FIG. 6, when an extension operation is required as a module unit, the parts are added unit parts, and the first stage 13, 14, 15 and the second stage 23, 24 and 25 are connected as a cable to which a connector is attached.

Therefore, in the 12 channel switching system shown in Fig. 6, the 2 * 2 logic switches of the second stage 25 are combined to act as 4 * 4 logic switches.

The cross-network switching system according to the present invention having the above-described configuration can increase 1.5 times or 2 times in the expansion of the channel, thereby reducing waste due to unnecessary channels in the case of expanding 2 ⁿ times and reducing the cost of the switching system. This is an inexpensive way to configure the switching system that best suits the current environment.

As described above, in the cross-network switching system, it is not necessary to design the switching capacity to be expanded in the future, and the channel can be expanded to 1.5 times or twice the current channel capacity in consideration of the increased channel environment. Therefore, there is an industrial use effect of providing a method for constructing a switching system suitable for cost reduction and channel environment.

Claims (3)

In the line extension method of the cross-network switching system composed of the first stage, the second stage and the third stage, In the first stage, a plurality of logical switch elements are outputted by receiving signals of three channels and outputting six channels of signals. In the second stage, a logic switch element that receives two channels of signals and outputs two channels of signals is used. The third stage uses a logical switch element for receiving a six-channel signal to output a three-channel signal, characterized in that for increasing the capacity of the switching system. The method of claim 1, The logical switching device that outputs six channels of signals by receiving signals of three channels used in the first stage may be used as a logical switching device that outputs four channels of signals by receiving two channels of signals. , The logical switch element that receives the six channel signals used in the third stage and outputs the three channel signals may be used as a logical switching element that receives the four channel signals and outputs two channels of signals. Capacity expansion method of the switching system characterized by the above-mentioned. The method of claim 1, The logical switching element used for the first stage is an input channel capacitance N divided by the number of input channels of the logical switching element, The logical switching element used in the second stage uses 2 * 2 switching elements by N channel capacities, The logical switching elements used in the third stage use the same number as the switching elements used in the first stage.