JPH05308687A - System for expanding time switch capacity of line exchange - Google Patents

Abstract

PURPOSE:To provide the system for expanding the time switch capacity of the line exchange capable of improving the effectivity of the capacity of time switch. CONSTITUTION:A 1st selection means 5 located between 1st input interfaces 3 and 1st time switches 2 selects data of each channel from a 2nd time switch 12 or data of each channel from 1st input interfaces 3. A 2nd selection means 15 located between 2nd input interfaces 13 and 2nd time switches 12 selects data of each channel from the 1st time switch 2 and selects data of each channel from the 2nd input interfaces 13.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a system for expanding the time switch capacity in a circuit switching device.

[0002]

2. Description of the Related Art FIG. 7 shows a schematic block diagram of a time switch provided in a conventional circuit switching apparatus. In FIG. 7, a time switch (TSW) 2 provided in the circuit switching device 1 is a time division switch, is connected with a plurality of input highways HW1 to HWn in which a plurality of channels are multiplexed, and multiple channels are multiplexed. The plurality of output highways HW1 to HWn are connected. The input interfaces 3 (3-1 to 3-n) are connected to the input highways HW1 to HWn, respectively, and the output interfaces 4 (4-1 to 4) are connected to the output highways HW1 to HWn. -N) are connected.

With such a configuration, a signal from a terminal or the like is input to the n input highways HW1 to HWn through the respective input interfaces 3-1 to 3-n, and this signal is timed by the time switch 2. And output again to the transmission line or the like through the n output highways HW1 to HWn and the output interfaces 4-1 to 4-n.

Here, if the number of terminals increases and the capacity of one time switch 2 is insufficient, the capacity of the time switch must be expanded. Conventionally, when expanding the capacity of this time switch, for example, two time switches are used.

FIG. 8 is a configuration block diagram showing an example in which the capacity of the time switch is expanded. In FIG. 8, a time switch 12 having the same configuration as the time switch 2 as shown in FIG.
And an input interface 13 and an output interface 14 having the same configuration as the input interface 3 and the output interface 4. Further, in order to expand the capacity, the output highway HWn of the time switch 2 and the input highway HW1 of the time switch 12 are connected to each other, and the input highway HWn of the time switch 2 and the time switch 1 are connected.
The output highway HW1 of No. 2 is connected.

[0006]

However, since one highway of one time switch is connected to one highway of the other time switch, two highways are monopolized for connection. In addition, highway HW
Since multiple channels are multiplexed, the exchange between the time switch 2 and the time switch 12 is inefficient because the remaining channels cannot be used when only a few channels are exchanged.

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a method for expanding the time switch capacity of an exchange capable of improving the efficiency of the time switch capacity. It is in.

[0008]

The present invention has taken the following means in order to solve the above problems. FIG. 1 shows the principle of the present invention.

The first time switch 2 is connected to the first input interface group 3 via the input highway groups HW1 to HWn in which a plurality of channels are multiplexed, and the output highway group in which a plurality of channels are multiplexed. HW1 to HW
It connects to the 1st output interface group 4 via n, and performs exchange connection of each channel.

The second time switch 12 is connected to the second input interface group 13 via the input highway groups HW1 to HWn in which a plurality of channels are multiplexed, and the output highway group in which a plurality of channels are multiplexed. HW1
The channels are connected to the second output interface group 14 via HWn to perform switching connection of each channel.

The first selecting means 5 is provided between any one of the first input interfaces 3 and the first time switch 2, and the data of each channel from the second time switch 12 or any one of the data. Input interface 3 of 1
Select the data for each channel from.

The second selecting means 15 includes any of the second input interfaces 13 and the second time switch 12.
And the data of each channel from the first time switch 2 or the data of each channel from any of the second input interfaces 13 is selected.

[0013]

[Action] By taking the above means, the following action is exhibited. FIG. 2 is a time chart of the first time switch of the present invention, and FIG. 3 is a time chart of the second time switch of the present invention. Hereinafter, the operation of the present invention will be described with reference to the drawings.

First, data is input to the channels 1 to m of the input highway HW1 via the first input interface 3 (HW1 input shown in FIG. 2). Then, by the switching connection operation of the first time switch 2, the lines are set to the channels 1 to m of the outgoing highway HWn.

After that, the second selector 15 is switched to the output highway HWn side of the first time switch 2. Therefore, the channels 1 to ∂ (data output from the first time switch 2 to the second time switch 12) of the output highway HWn of the first time switch 2 are transferred to the second time via the second selector 15. Are input to the channels 1 to ∂ of the input highway HW1 of the time switch 12 (HW1 input shown in FIG. 3). Further, by the switching connection operation of the second time switch 12, the channels are set to the channels 1 to m of the output highway HWn, and the data of the ∂ channel is sent to the B terminal via the second output interface 14-n ( (HWn output shown in FIG. 3).

On the other hand, the first selector 5 is switched to the first input interface 3 side. Therefore, the ∂ + 1 to m-channel data (HWn line input shown in FIG. 2) from the first input interface 3 is transferred to the first selector 5
Via the input highway HW of the first time switch 2
Input to n channels ∂ + 1 to m (HW shown in FIG. 2
n inputs). Further, by the switching connection operation of the first time switch 2, the signals are output to channels 1 to ∂ of the output highway HW1 (HW1 output shown in FIG. 2).

According to the conventional time switch capacity expansion method, the HWn output data of the expansion first time switch is only the data from the first input interface 3 and any one of the first inputs. Interface 3
Data (not for extension) used another highway HW. Therefore, the use efficiency of the channels of the highway HWn is poor.

According to the invention, the first time switch 2
Since the data of each channel from one of the first input interfaces 3 and the second time switch 2 are multiplexed with the data of the output highway HWn, the channel can be effectively used. As a result, the circuit switching device can be downsized.

Further, from the control means 21 to the first selection means 5
Alternatively, selection information may be given to the second selection means 15 to control them. Also, the control means 21
May be an address control memory.

[0020]

EXAMPLES Specific examples of the present invention will be described below.
FIG. 4 is a configuration block diagram of an embodiment of the present invention. In FIG. 4, the first time switch 2 included in the first circuit switching device 1 is connected with, for example, eight input highways HW1 to HW8 in which a plurality of channels are multiplexed, and in which a plurality of channels are multiplexed, for example. Eight exit highways HW1
~ HW8 is connected.

The input highways HW1 to HW8 have a first input interface 3 corresponding to them.
(3-1 to 3-8) are connected to each of the output highways HW1 to HW8.
(4-1 to 4-8) are connected.

A second time switch 12 having the same structure as the first time switch 2 and a second input interface 13 (13) having the same structure as the first input interface 3 (3-1 to 3-8). -1 to 13-8) and a second output interface 14 (14-1 to 14-14) having the same configuration as the first output interface 4 (4-1 to 4-8).
-8) and are provided.

The first selector 5 is provided between the first input interface 3-8 and the first time switch 2, and the highway H of the second time switch 12 is provided.
The data of a plurality of channels from W1 or the data of a plurality of channels from the first input interface 3-8 are selected and output to the highway HW8.

The second selector 15 is provided between the second input interface 13-1 and the second time switch 12, and the highway HW of the first time switch 2 is provided.
The data of a plurality of channels from 8 or the data of a plurality of channels from the second input interface 13-1 are selected and output to the highway HW1.

The address control memory 21 has a first address
The time switch 2 and the second time switch 12 are connected and exchanged, and information as to whether or not to go to the other time switch is stored in advance in the memory, and the first selector 5 is used by using this information. And controlling the selection timing of the second selector 15.

In this embodiment, for example, the time switch 2,
Highway HW with 12 basic capacities of 960 channels
There are eight channels and one highway HW has 120 channels. FIG. 5 is a time chart of the first time switch in the embodiment, and FIG. 6 is a time chart of the second time switch in the embodiment.

Next, the operation of the embodiment thus constructed will be described with reference to the drawings. A case where the 10-channel data of the A terminal is output to the B terminal and a case where the 110-channel data of the C terminal is output to the D terminal will be described.

First, the data from the A terminal is input to the channels 1 to 10 of the input highway HW1 via the first input interface 3-1 (HW1 input shown in FIG. 5). Then, by the exchange connection operation of the first time switch 2, the lines are set to the channels 1 to 10 of the output highway HW8.

After that, the address control memory 21
The second selector 15 is switched to the output highway HW8 side of the first time switch 2 in response to the selection signal from (selection signal shown in FIG. 6). Therefore, the first time switch 2
Channels 1 to 10 of the output highway HW8 are input to the channels 1 to 10 of the input highway HW1 of the second time switch 12 via the second selector 15 (FIG. 6).
HW1 input). Furthermore, the second time switch 1
By the switching connection operation of No. 2, the channels are set to the channels 1 to 10 of the outgoing highway HW8, and the data of the ten channels are sent to the terminal B through the second output interface 14-8 (HW8 output shown in FIG. 6). ..

On the other hand, the selection signal from the address control memory 21 switches the first selector 5 to the first input interface 3-8 side (selection signal shown in FIG. 5). Therefore, the 110-channel data from the C terminal (HW line input shown in FIG. 5) is transmitted through the first selector 5 to the input highway HW8 of the first time switch 2.
Channels 1 to 10 (HW8 input shown in FIG. 5). Further, by the switching connection operation of the first time switch 2, the data is output to the channels 1 to 10 of the output highway HW8 and sent to the D terminal (HW8 output shown in FIG. 5).

In the conventional time switch capacity expansion system, the HW8 output data of the first time switch 2 is only the data of the A terminal, and the data of the C terminal is:
Other highways such as HW7 were used. Therefore, the use efficiency of the channels of the highway HW8 was poor.

In the case of the time switch capacity expansion system in the embodiment shown in FIG. 4, the data from the C terminal to the D terminal is output to the data of the output highway HW8 of the first time switch.
Since the 0-channel data is multiplexed, the channels can be used effectively.

Here, a comparison will be made between the conventional time switch capacity expansion method and the time switch capacity expansion method of the embodiment. With the conventional expansion method, the time switch has a basic capacity of 960 channels, eight highways, and 1
120 channels per highway, time switch 2
The signals between the time switch 12 and the time switch 12 are each 10 channels. With the conventional expansion method, the capacity is 960 × 2-120 × 2 + 20 = 1700 channels.

On the other hand, in the case of the embodiment using the selectors 5 and 15, the capacity is 960 × 2 = 1920 channels, and a capacity larger than that of the conventional expansion system can be obtained, whereby the circuit switching apparatus can be downsized. be able to.

The present invention is not limited to the above embodiment. In the embodiment, the case where the two time switches 2 and 12 are connected has been described, but the present invention is also applicable to the case where, for example, a circuit switching device is further added to connect three or more. In this case, the effect is even greater.

[0036]

According to the present invention, since the data of the output highway HWn of the first time switch 2 is multiplexed with the data of each channel from any one of the first input interfaces 3, the channel is enabled. Can be used for As a result, the circuit switching device can be downsized.

[Brief description of drawings]

FIG. 1 is a principle diagram of the present invention.

FIG. 2 is a time chart of a first time switch according to the present invention.

FIG. 3 is a time chart of a second time switch according to the present invention.

FIG. 4 is a configuration block diagram of an example.

FIG. 5 is a time chart of the first time switch in the embodiment.

FIG. 6 is a time chart of a second time switch in the example.

FIG. 7 is a configuration block diagram of a time switch in a conventional circuit switching device.

FIG. 8 is a diagram showing an example of expanding the capacity of a conventional time switch.

[Explanation of symbols]

 1-First circuit switching device 2-First time switch 3-First input interface unit 4-First output interface unit 5-First selector 11-Second circuit switching device Device 12-Second time switch 13-Second input interface unit 14-Second output interface unit 15-Second selector 21-Address control memory HW-Highway

Claims (3)

[Claims] 1. A first output connected to a first input interface group (3) via an input highway group in which a plurality of channels are multiplexed and via an output highway group in which a plurality of channels are multiplexed. A first time switch (2) connected to the interface group (4) for switching connection of each channel, and a second input interface group (13) via an input highway group in which a plurality of channels are multiplexed. A second time switch (1) which is connected to a second output interface group (14) through an output highway group in which a plurality of channels are multiplexed and which performs switching connection of each channel.
2), data of each channel from the second time switch (12) provided between the any one of the first input interfaces (3) and the first time switch (2), or any one of the above. Kano's first input interface (3)
A first selecting means (5) for selecting the data of each channel from, and the first time selector (5) provided between any one of the second input interfaces (13) and the second time switch (12). Data of each channel from the time switch (2) or the second input interface (1
And a second selecting means (15) for selecting the data of each channel from (3). 2. The first selection means (5) or the second selection means (5)
2. The time switch capacity expansion system for a circuit switching apparatus according to claim 1, further comprising control means (21) for giving selection information to said selection means (15). 3. The time switch capacity expansion system for a circuit switching apparatus according to claim 1, wherein said control means (21) is an address control memory.