JPS6226638B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a signal distribution scheme in a digital telephone exchange.

Regarding the conventional signal distribution method, Figures 1 and 2
This will be explained using figures. In Fig. 1, 1 is a time division network, 21 to 2n are primary time switch modules (TSM#1 to #n), 31 to 3n are highway multiplexers (MPX), and 41 to 4n are primary time switches. (PSW), 51 to 5n are secondary time switch modules (TSM #1 to #n), 61
~6n is a secondary time switch (SSW), 71~7n
is a multiplexer (DMPX), 8 is a space switch junctor composed of space division type switches, 9
1 to 9i are signal highways, 10 is a maintenance and operation unit (DMAU), 11 is a time division network (DCC) provided in the maintenance and operation unit 10, and 121 to 12
i is the highway interface circuit (HW
INF1-i), 13 is an analog/digital conversion circuit (A/D), 141-14m is a signal sound source (SIG1-m) for each signal type, and 15 is an audio signal highway. Also, in Figure 2, 91,9
_{2 , . _ _ _}
shows a case where 64 types of signals are provided for each of n secondary time switch modules 51 to 5n.

In FIG. 1, when a signal is distributed from the maintenance operation device 10 to each voice signal highway 15 of the time division network 1, signal highways 91 to 9 are used.
Time slots for the i signal are provided and distributed corresponding to the secondary time switch modules 51 to 5n. Therefore, if there are m signal types, m time slots are required to correspond to the secondary time switch modules 51 to 5n. Signal type (SIG1~m)
is expected to be around 60, considering general signals such as time signals and weather signals, disaster signals, future new service signals, and other signals. Therefore, assuming 32 time slots per highway, 2
One input highway is required for each primary time switch module _21-2o , and a plurality of highway interface circuits 121-12i are required. For example, if two signal highways are required to allocate all signal types to each time slot, and these signal types are further provided corresponding to n secondary time switch modules 51 to 5n, a total of 2 _o A highway interface circuit is required.

Next, the signal flow will be explained in detail using FIGS. 1 and 2. In addition, here, the number of signal types is set as m=64, and along with this, signal highways 91-
9i will be explained assuming that i=2n pieces. Signal sound source 14
The signals from 1 to 14 m are converted from analog signals to digital signals by the analog/digital conversion circuit 13, and are transmitted via the time division network 11 in the maintenance operation equipment 10 and the highway interface circuits 121 to 12i as shown in FIG. As shown in FIG. 9, signals are inserted into predetermined time slots of signal highways _91-92o . The signals from the audio signal highways 91 and 92 are then multiplexed together with the signals from the audio signal highways in the multiplexers 31 to 3n in the primary time switch modules 21 to _2o (for example, the signals from the signal highways 91 and 92 are input to the multiplexers 31 to 3n). The primary time switches 41 to 4n perform time slot exchange specified by a control device (not shown), and the space switch junctor 8 performs control (not shown). A highway connected to the secondary time switch modules 51 to 5n specified by the device is selected. For example, when distributing a signal of signal type SIG1 to the secondary time switch modules ₅₁ and _5n , the spatial switch module shown in FIG. The cross points _Xo1 and _X1o in the data 8 are closed. Further, secondary time switches 61 to 6n perform time slot exchange designated by a control device (not shown), and the demultiplexers 71 to 7n distribute the time slots to the audio signal highway 15.

As described above, in the conventional system, the signal time slots of the signal highways 91 to 9i are provided corresponding to the n secondary time switch modules 51 to 5n, and the time slots for the signals of the signal highways 91 to 9i are provided corresponding to the n secondary time switch modules 51 to 5n. Because of this, there were drawbacks described below.

(1) If there are many signal types, one signal highway
A plurality of channels are required per next time switch module, and the call volume capacity decreases as the voice signal highway appearance of the switch module decreases.

(2) As the number of signal highways increases, not only does the number of highway interface circuits within the maintenance and operation equipment increase, but also the scale and complexity of the time-sharing network within the maintenance and operation equipment increases.

The purpose of the present invention is to prevent the above-described reduction in traffic capacity of the time division network, reduce the number of highway interface circuits in maintenance and operation equipment,
An object of the present invention is to provide a signal distribution method that can reduce the size of a time division network within a maintenance and operation device.

For this purpose, the present invention provides at least one row (or column) of space-divided switches in a space switch junctor with a certain periodicity so that an input signal from one highway can be distributed to multiple highways simultaneously. Provides a function to simultaneously control the
A signal highway in which one time slot is allocated per signal type is input to the space division type switch in this row (or column), and when that signal is input, the same signal as that input signal is sent to multiple secondary time switches by the control function. It is configured to be distributed among modules.

Hereinafter, the present invention will be explained in detail with reference to the drawings.

FIG. 3 shows one embodiment of the signal distribution system according to the present invention, and in the figure, parts with the same functions as those in FIG. 1 are given the same reference numerals. FIG. 3 illustrates a function for simultaneously controlling the closing of the space division type switches of n cross points _Xo1 to _Xoo belonging to the same row in the space switch junctor (TDJ) 8 at a certain period. This control function allows the primary time switch module 21 to be
The configuration is such that the n crosspoints _Xo1 to _Xoo are simultaneously closed at the timing when the time slot to which the signal is allocated arrives on the incoming highway. Additionally, along with this, the number of highways that transmit each signal type (SIG 1 to SIG m) is reduced to two signal highways 91 and 92, and 64 types of signals are transmitted to each time slot 1 to 64 on these signal highways 91 and 92. It is arranged to be allocated to Fourth
The figure shows the arrangement of time slots on the signal highways 91 and 92 in this case, and FIG. It is something. Next, Figure 3,
The control operation will be explained using FIGS. 4 and 5.

First, signal sound source (SIG1~m) 141~14m
The signal generated in Ace circuit (HW INF1, 2) 1
21, 122, and are arranged at predetermined time slots of each frame of the signal highways 91, 92 as shown in FIG. Note that here, for convenience, the signal type is set to m=64. Next, the frames on the signal highways 91, 92 are multiplexed with the frames from the audio signal highway in a multiplexer (MPX) 31 in the primary time switch module (TSM#1) 21, and then
A next time switch (PSW) 41 performs time slot exchange designated by a control device (not shown). The multiplexed frames here are arranged in a certain manner as shown in Fig. 5. In Fig. 5, F1 is a test frame;
F2 and F3 indicate signal frames, and F4 to F32 indicate audio frames.

The multi-frame shown in FIG _.
~
~5n is switched. In this case, in the control device, the test and audio frame F
1. When switching time slots F4 to F32, all cross point switches X ₁₁ to
Operates _oo as a 1:1 distribution switch. Fifth
In the figure, as an example, only the cross point switch _Xo1 is closed at the second time slot T of the audio frame F4, and the time slot T
A case is shown in which the signal is distributed as an input to the secondary time switch 61 of the secondary time switch module 51. On the other hand, when switching the time slots of the signal frames F2 and F3, the cross point switches _Xo1 to _Xoo in one row are simultaneously operated as 1:n distribution switches. This control applies to frames F2 and F3 at predetermined positions within the multi-frame.
Since this is carried out periodically at the timing of arrival, it can be realized without requiring particularly complicated control. As a result, the signal time slots 1-64 of the signal frames F2, F3 are distributed as they are to all the secondary time switch modules 51-5n.
After that, each secondary time switch module 51-5
The signal time slots 1 to 64 distributed in n are:
The desired signal type is exchanged to the desired time slot position on the audio signal highway 15 by the secondary time switches (SSW) 61 to 6n of the respective switch modules 51 to 5n, and demultiplexed by the demultiplexers 71 to 7n. After being multiplexed,
The audio signal is output to the highway 15. for example,
Signal time slots 1 to 6 input to the secondary time switch 61 of the secondary time switch module 51
4 is a secondary time switch 61 as shown in FIG.
, the signal of signal type 2 is transferred from time slot position 2 to time slot position 32, and signal type 3 is transferred from time slot position 2 to time slot position 32.
By exchanging the signal from the time slot position 33 to the time slot position 34, signals of signal types 2 and 33 are output to the output highway 15 corresponding to the time slot position. Although only the secondary time switch 61 is shown in FIG. 5, the secondary time switches 62 to 62 in other switch modules are shown.
Needless to say, in the case of 6n, similar time slot exchange is performed depending on the type of signal required for the output highway.

In the embodiment, the space switch janctor 8
Although a case has been described in which only one row within the frame is controlled when a signal frame arrives, the present invention is not limited to the above points, and a method of controlling multiple rows (or columns) simultaneously according to the number of signal types, etc. But it goes without saying that it's a good thing. Also, signal highway 1
Although the case where the signal highway is accommodated in the next time switch module has been described, the signal highway may be multiplexed by other means and accommodated directly in the space switch module.

As explained above, according to the present invention, all the space division type switches belonging to the row (or column) corresponding to the input signal highway in the space switch junctor are controlled to be closed simultaneously. The signal time slots can be used in common by a plurality of secondary time switch modules, and the number of signal time slots only needs to be provided for the number of signal types. Therefore, the number of input signal highways is sufficient to allocate signal time slots for the number of signal types, and the number of input signal highways can be reduced by reducing the traffic capacity due to an increase in the number of input terminals for signal highways in a time division network, and by reducing the number of input signal highways for voice signal highways. The number of input terminals does not decrease much. Furthermore, there is an advantage that the highway interface circuit and time division network within the maintenance and operation equipment can be significantly reduced in size and size as the number of signal highways is reduced.

Furthermore, since the position of the signal time slot is fixed, switch control in the spatial switch junctor allows 1:1 and 1:n control to be performed periodically, which has the advantage of being extremely easy to implement. .

[Brief explanation of the drawing]

FIG. 1 is a diagram showing a conventional signal distribution system, FIG. 2 is a diagram showing the time slot arrangement of the signal highway in FIG. 1, FIG. 3 is a diagram showing an embodiment of the signal distribution system according to the present invention, 4 is a diagram showing the time slot arrangement of the signal highway in FIG. 3, and FIG. 5 is a diagram showing the arrangement of signal frames in the multi-frame configuration in FIG. 3 and their control. 1, 11...Time division network, 21-2 _o ...
Primary time switch module, 51-5n...Second-order time switch module, 8...Space switch module, 91, 92...Signal highway, 141-
14m...signal sound source, 15...audio signal highway,
31-3n...multiplexer, 71-7n...demultiplexer, 41-4n...primary time switch,
61 to 6n...Secondary time switch, 10...Maintenance and operation device, 121, 122...Highway interface circuit, 13...Analog/digital conversion circuit, _X11 to _Xoo ...Cross point switch.

Claims (1)

[Claims] 1 Spatial switching connection between a plurality of primary time switches, a plurality of secondary time switches, and incoming highways from the plurality of primary time switches and outgoing highways to the plurality of secondary time switches for each time slot. In a digital switching system having a time-division network consisting of one intermediate spatial switch, in a row (or column) of said intermediate spatial switch that accommodates an incoming highway containing a signal time slot at a predetermined position. A function is provided to simultaneously control all the switches belonging to the above-mentioned row (or column) when the signal time slot arrives on the highway at a desired period. A signal distribution system characterized in that the signal is distributed to all outgoing highways accommodated in all columns (or rows) of the intermediate space switch.