JPH02206994A - Spatial division switch network - Google Patents

Abstract

PURPOSE:To attain both 1:1 and 1:n connection with less hardware by limiting the number of input signals enabling the 1:n connection to a value k (k <=total input terminal number) with respect to an optional input, providing a selection section to an input section of a non-blocked network applying the 1:1 connection and providing a distribution section to an output section. CONSTITUTION:The spatial division switch network is provided with a non- blocked network 7 for the 1:1 connection, a selection section 8 selecting an optional number (k) among N inputs and connecting the N inputs directly to the non-blocked network 7, and a distribution section 9 applying 1:n connection of plural signals selected by the selection section 8 to outputs of N sets of outgoing lines and connecting either an output of a spatial division switch network applying 1:1 non-blocked connection or an output of the spatial division switch applying the 1:n connection to the output of the outgoing line. Thus, the spatial division switch network with less hardware and enabling the 1:1 and 1:n connection is obtained.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a space division switch network, and particularly to a space division switch network that has a small amount of hardware and is highly expandable.

[Conventional technology]

FIG. 7 shows the configuration of a conventional space division switch network. In FIG. 7, 571 is a switch of a certain unit scale (hereinafter referred to as a unit switch) 1, for example, a switch LSI.
, 72 is a selector circuit, 73 is an input data highway,
74 is an output data highway. The configuration and operating principle of a conventional space division switch network will be explained using FIG. In FIG. 7, the input data highway 73
The above data shows unit switches arranged in the row direction, e.g. 71-11°71-12.71-13 (not shown),
71-14 All are written redundantly. Also, the data exchanged to the power output highway is transferred to the unit switches arranged in the column direction, e.g. 71-11, 71-
21, 71-31, and 71-41. In other words.

What kind of input cuff 3-11, 73-12~ does a certain output in FIG. 3-44 can also be connected. For example, to connect 73-31, unit switch 7
1-31 for connection, and selector 74-14 to select the unit switch itself. Outputting a signal from one input by specifying one output using this method 1:
Regarding one connection, in this conventional example, all 4 x 4 unit switches are 1
Six switches are used to form a 16×16 switch network. Similarly, when considering a more advanced broadcasting distribution service, a 1:n connection is made in which n outputs of signals 't-2 or more from one input are specified and output. For example, 73
-31 input to all output cuffs 4-11 to 74-44, unit switches 71-31, 71-3
2.71-Oh, the signal is branched into four at 71-34.

Further, selectors 72-11 to 72-44 select unit switches 71-31 to 71-34. Note that a control section (not shown) performs grasping of the connection status of the unit switch and instructions regarding the connection. The control unit analyzes the input, output, and current connection status of data just before it enters the switch network, and controls the connections of the switches. In this way, if you configure a network of unit switches in a matrix, the ratio is 1:1, 1:n
A connection can be unblocked, that is, a connection can be made in a state where there is always one or more paths between an empty input and an empty output, regardless of the input/output connection status.

However, there is a drawback that the number of unit switches needs to be increased to 4 for doubling, and N8 unit switches to be increased to N times. This becomes a big problem when you want to increase the matrix size.

Also, in normal communication, 1:1 connection is better than 1:n connection.
The traffic is much larger than the connection and all inputs are
: There is little need to perform n connections, and the disadvantage is that it has excessive functionality. In addition, a CLO8 network has been proposed as a conventional method that does not block 1:1 connections, but this method does not block 1:n connections (that is, depends on the input/output connection status). Since there are cases where there is no path from an empty input to an output, it cannot be used for broadcast distribution, etc.

This FiA solves the conventional problem of requiring hardware proportional to N''K to the expansion amount N when expanding scale, and requires less hardware and 1:1°l:n. K provides a space-division switch network that can be connected.

[Means to solve the problem]

In order to achieve the above object, the present invention mutually connects a plurality of incoming lines and a plurality of outgoing lines, and specifies an input signal from any one of the incoming lines to any one of the outgoing lines. A 1:1 non-closed connection for outputting, and a 1:n connection for specifying and outputting an input signal from any one of the incoming lines to any number n of the outgoing lines. In the space division switch network that performs the above-mentioned 1:1 non-blocking connection of the N×N non-blocking network that performs the non-blocking connection of data input from N incoming lines among the plurality of incoming lines, selection of selecting any plurality of signals from among the inputs from the N incoming lines, and connecting them to the space division switch network that performs the 1:1 non-blocking connection by all inputs from the N incoming lines; The plurality of signals selected by the selection section are connected to the outputs of the N outgoing lines to the output section of the space division switch network that performs the 1:1 non-blocking connection, and at the same time the l :1 The system is characterized by comprising a distribution unit that connects either one of the output of the space division switch network that performs non-blocking connection and the output of the space division switch that performs 1:n connection to the output of the outgoing line. .

Also, it has m inputs and m outputs, and outputs a signal from any one input by specifying any one output.
: l Non-blocking connection and outputting a signal from any one input by specifying multiple n outputs. Perform a 1:n connection, and output the output of the l:1 non-blocking connection and the output of the l:n connection. In a space division switch network consisting of a unit space division switch that outputs either one of the unit space division switches, the unit space division switch is provided with an input latch and an output latch at the input and output parts of a cross-point matrix forming a connection path, respectively, and a through output terminal that outputs the input from the input section through, an expansion input terminal that inputs the expansion input, and a signal of the expansion input input from the expansion input terminal that is spatially exchanged via the cross point matrix. It is also effective to provide an input signal and an output terminal that outputs either one of the signals.

[Effect]

The present invention limits the number of input terminals capable of 1:n connection to an arbitrary input and a certain value k (k≦total number of input terminals), and also provides an entrance to a non-blocking network that performs 1:1 connection. The main feature of the system is that it has a selection section and a distribution section at the output, so that it is possible to connect any of the N input signals 1:n, and at the same time connect the other inputs 1:n. 1 can be connected,
In addition, especially in large-scale network configurations,
It is possible to reduce the appearance. A general non-blocking network configuration method is a well-known technique, for example, A 5tudy on
Non-Blocking Switching
twork”, The Be1l System
Technical Journal pp, 404
-+march, 1953. The present invention differs from the prior art in network configuration, amount of hardware, and expansion method, and is a switch network with a small amount of hardware that can partially perform 1:n connections.

Embodiments will be described below based on the drawings. Embodiment FIG. 1 is a diagram illustrating the present invention in detail, and 1 is a unit space division switch. Even if this is an LSI,
It may also be a module or the like. 7 is a non-blocking network for 1:1 connections. Also, 8 is any k from N inputs.
1 is selected, and at the same time, the N input is connected to the non-blocking network 7 through. Further, 9 is a distribution unit which can arbitrarily distribute and connect the inputs to the output NK or select either one of the outputs of the non-blocking network 7.

Figure 2 shows the unit space division switch of nX, n, or υ, L.
1 is a configuration diagram showing an SI module 1. FIG. In FIG. 2, 6 is an nXn cross point matrix. Connection control of the crosspoint matrix 6 is performed from outside by a control unit (not shown) that knows the current switch connection status, and the control unit controls the input and output of data before it is input to the switch network. This system determines all the connection status of switches and controls the switch network, and applies the connection control function of conventional crosspoint matrices of this type. Generally, ACM (Ad
dress control memory). In addition, 5-1 is an input latch,
5-2 is an output latch. Also, 10 is 2 of nbit:
1 selector. The control of this selector 1G is also controlled from outside the housing by an unillustrated control section, similar to the previous cross point matrix. Furthermore, when the control bus is established, when a call is generated and a path is determined in advance, the call is controlled by a route other than the communication path called a common line.

The configuration of the present invention will be explained using FIGS. 1 and 2. First, in FIG. 2, data input from the input (I) is latched and output by the input latch 5-1. Also,
The expansion input data from the expansion input (E) and the output of the 6 nXn crosspoint matrices are selected by 10 2:1 selectors for each highway, and one of them is latched into the output latch 5-2. Ru. The output of the output latch 5-2 is output to the outside of the module from the output (0). This module is used to configure a switch network as shown in Figure 1. First, in the selection part 8, N
The input of the book is each unit space division switch 1-11 to 1-14
is input. N inputs (from the through output terminal (T) of each unit space division switch) are output through.

In each unit space division switch, any k of the input n
is selected and transferred to the expansion input E of the unit space division switch in the lower row in the column direction. Bottom space division switch 1-14
An arbitrary k can be selected from the input N as the output k. These signals are used for 1:n connections. In the non-blocking network No. 7, an N×N non-blocking network 1:1 connection is performed. The data of the selected number 9 is input to the input (I) of the unit space division switch 1-21 at the uppermost stage in the column direction of the distribution section 9. In each unit space division switch, either the signal from the expansion input terminal (E) or the signal from the input (I) is selected and transmitted to output (0)K. Also, the signals for 1:n inputted from the input (I) are passed through the through output (T),
The signal is transmitted to the lower unit space division switch in the column direction.

In this way, if attention is paid to one output in 5, it is possible to select either the input signal from the expansion input terminal (E) provided or the output signal of the non-blocking network in 7.

As a result, any number of signals among the N inputs can be connected 1:n, while other inputs can be connected 1:1.

A specific connection example will be explained using FIG. 3, FIG. 4, and FIG. 5. FIG. 3 shows the configuration of the selection section 8.

The input signal is connected to the network 7 through the through output of each unit space division switch 1-1.1-2, making an l:1 connection. On the other hand, the signal intended for 1:n connection is 10
After being selected by the selector, multiple inputs are made to the expansion input (E) on the lower stage, passed through unit space division switches connected in cascade, and outputted from the unit space division switch on the lowest stage. These two signals are connected to the unit space division switch at the top of FIG. The signals intended for 1:n connection, which are input multiple times from the top stage of the distribution section 9, are connected in cascade to the through-out output (T) of each unit space division switch and to the input of the unit space division switch at the lower stage. be done.

These input signals are also exchange-connected to the output 4 through a cross-point matrix.

In this way, k signals can be connected 1:n. In addition, signals intended for 1:1 connection are not selected by the selection unit 8 shown in FIG. Connect to the expansion input (E) of the unit. These multiple input signals from the expansion input (E) can be connected to multiple outputs 4 by selecting them using the 2:1 selector 10.

FIG. 5 shows a connection example of the space division switch network of the present invention in which the "a#" signal is connected 1:n to 5 outputs, and the "b" signals are all 1:1 connected.As shown in the figure, the selection unit 81 Using the distribution unit 9, non-blocking connections are possible for 1:1 and 1:n connections.

FIG. 6 shows the relationship between the network size (N) and the number of unit switches when the unit space division switch l fe64X is used, and the number k of signals that can be connected in a 1:n manner is determined using parameters. As described above, it can be seen that, although it depends on the kO value, realizing a large-scale network brings about a large merit in the amount of hardware.

〔Effect of the invention〕

As explained above, according to the configuration of the space division switch network of the present invention, both 1:1 and 1:n connections are possible, and basically the hardware increases in proportion to the network size N. , in the conventional matrix configuration, N
In contrast to this, the present invention requires only a small amount of hardware.

[Brief explanation of the drawing]

Fig. 2 is a block diagram of an embodiment of unit space division, Fig. 3 is a block diagram of an embodiment of a selection section according to the present invention, Fig. 4 is a block diagram of an embodiment of a distribution section according to the present invention, and Fig. 1g5 is a block diagram of an embodiment of the present invention. FIG. 6 is a diagram showing the effects of the present invention, and FIG. 7 is a configuration example of a conventional space division switch network. 1...Unit space division switch 2...Selector 3.73...Input data highway 4.74...Output data highway 5-1...Input latch 5-2...Output latch 6...・nXn cross point matrix 7...Non-blocking network 8...Selection unit configuration 9...Distribution unit configuration 10...Selector 71...Unit switch 72...Selector circuit Patent applicant Nippon Telegraph and Telephone Co., Ltd. agent Patent attorney Hisashi Tamamushi Go (1 other person) Output (0) Example configuration diagram of unit jump minute vI Suisona 2 Diagram showing the size of the network (N) Demonstrates the effects of the present invention Figure diagram

Claims (2)

[Claims] (1) 1:1 non-blocking in which multiple incoming lines and multiple outgoing lines are mutually connected, and an input signal from any one of the incoming lines is specified and outputted to any one of the outgoing lines. and a 1:n connection in which an input signal from any one of the incoming lines is specified and outputted to any number of n outgoing lines among the outgoing lines, At the input part of the space division switch network that performs the 1:1 non-blocking connection of the N×N non-blocking network that performs the non-blocking connection of data input from N incoming lines among the plurality of incoming lines,
Select any multiple signals from the input lines of the book,
and a selection unit that connects the inputs from the N input lines through to the space division switch network that performs the 1:1 non-blocking connection, and connects the inputs from the N input lines to the output unit of the space division switch network that performs the 1:1 non-block connection. , the plurality of signals selected by the selection section are N
At the same time, the above 1:n is connected to the output of the output line of the book.
:1 non-blocking connection and the output of the space division switch making 1:n connection to the output of the outgoing line. Space division switch network. (2) 1 which has m inputs and m outputs and outputs a signal from any one input by specifying any one output
:1 non-blocking connection and a 1:n connection that outputs a signal from any one expansion input by specifying multiple n outputs,
In a space division switch network consisting of a unit space division switch that outputs either the output of the 1:1 non-blocking connection or the output of the 1:n connection, the unit space division switch includes a cross point forming a connection path. The input section and the output section of the matrix are provided with an input latch and an output latch, respectively, and a through output terminal outputs the input from the input section through, an expansion input terminal that inputs an expansion input, and an input from the expansion input terminal. 1. A space division switch network comprising: an output terminal that outputs either an extended input signal that is exchanged via the cross-point matrix or an input signal that is spatially exchanged via the cross-point matrix.