JPH0783505B2 - Time division - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a configuration of a time division speech path in a time division exchange.

(Conventional Technology) As a conventional technology in such a field, Kiyoshi Matsumoto et al. “Study on low power consumption of time switch LSI capable of high-speed processing”
Some of them were disclosed in (Electronic Communication Society General National Conference Proceedings 461 of 1985). Hereinafter, description will be given along this line.

FIG. 2 shows an example of a time-division communication path in a conventional time-division exchange, in which the number of incoming highways and the number of outgoing highways are 8
An example of a book is shown. In the figure, 1-1 to 1-8 are incoming highways, 2-1 to 2-8 are outgoing highways, and 3-1 to 3-8.
Is a time switch (TSW) (however, in the drawing, the input highway 1-2 to 1-7, the output highway 2-2 to 2-7, and the time switch 3-2 to 3-7 are omitted).

The time switch 3-1 is an input highway 1-1 to 1-8.
Corresponding to the highway multiplicity, for example, channel memory (SPM) 4-1 to 4- having a capacity of 1024 time slots
8 (however, the call path memories 4-2 to 4-7 are omitted in the drawing) and one of the call path memories 4-1 to 4-8 is selected to exit the highway 2-. 1 and a selector (SEL) 5 connected to 1 and call path memories 4-1 to 4-
8 and a control memory (SCM) 6 for controlling the selector 5, and other time switches 3-2 to 3-3.
-8 has the same structure.

In the above configuration, the information input from the incoming highways 1-1 to 1-8 is written into one time switch, for example, the channel memory 4-1 to 4-8 of 3-1 for 1024 time slots, respectively, and controlled. Time-slot conversion is performed in accordance with the 10-bit control information sent from the memory 6 to the communication path memories 4-1 to 4-8 via the control information line 7, and further read from the control memory 6 via the control information line 8. Selector 5
Any one of them is selected and output according to the 3-bit control information sent to the switch. At this time, the information input from the input highways 1-1 to 1-8 is the other time switch 3-2. Similarly, in 3-8, the data is processed and output, converted into a highway by this, and output to each of the output highways 2-1 to 2-8.

The time-division speech path described above is constructed by mounting the time switch having a capacity corresponding to eight incoming highways and one outgoing highway as a mounting unit, and combining eight of these into a matrix of the speech path memory. Has been done. FIG. 3 shows an implementation mode of the time division speech path described in FIG.

By the way, depending on the exchange, the number of incoming highways or outgoing highways is not limited to eight and may be less than eight. Even in this case, a time-division speech path can be constructed by combining the required number of time switches so that the speech path memories are arranged in a matrix.

For example, when the number of incoming highways and the number of outgoing highways are four, that is, only the incoming highways 1-1 to 1-4 and the outgoing highways 2-1 to 2-4, as shown in FIG. It can be realized by combining only -1 to 3-4.

(Problems to be Solved by the Invention) However, as described above, the number of incoming highways or outgoing highways of the time division speech path to be configured is the maximum of the number of incoming highways or outgoing highways in one time switch. If it is smaller than the value, a portion of the time switch where there is no incoming highway or outgoing highway, for example, the channel memory corresponding to the shaded portion of the time switches 3-1 to 3-4 in the example of FIG. There is a problem that the speech path memories 4-5 to 4-8 are not used at all.

The present invention eliminates the above-mentioned problems, and reduces the unused channel memory even when the number of incoming highways or outgoing highways of a time division speech channel to be configured is smaller than the maximum value of the number of incoming highways or outgoing highways. The purpose of the present invention is to provide a possible time-divisional communication path.

(Means for Solving Problems) In order to solve the above problems, the present invention includes a plurality of communication path memories and control memories corresponding to the number of incoming highways or the number of outgoing highways, and any one of the incoming highways is provided. The number of time switches that connect one to one outgoing highway or connect one incoming highway to each outgoing highway is equal to the number of outgoing highways or the number of incoming highways, and the channel memory is in a matrix. In the time-division speech path combined so that each time switch is divided into a basic unit and an extension unit that can be mounted separately, and the basic unit has n less than the maximum value N of the number of incoming highways or the number of outgoing highways. Channel memory, a control memory, a first selector for selecting any one of the n channel memories, and an output of the first selector. And a second selector for selecting one of the outputs of the expansion unit and the expansion unit, and the expansion unit includes (N-n) or less speech path memories and (N-n) or less A selector for selecting one of the channel memories is provided.

(Operation) According to the present invention, when the number of incoming highways or the number of outgoing highways of the time-division speech path to be constructed is n or less, the time-division is implemented by mounting only the basic unit of each time switch. If the number of incoming highways or outgoing highways of the time-division call path to be constructed is greater than n, the time-division call can be constructed by mounting the extension unit together with the basic unit of each time switch. You can build a road.

(Embodiment) FIG. 1 shows an embodiment of the time-division speech path of the present invention, in which the number of incoming highways and the number of highways are 8 as in the conventional example. The same components as those in the example are designated by the same reference numerals. That is, 1-1 to 1-8
Is the entrance highway, 2-1 to 2-8 is the exit highway, 9A-
1-9A-8 is a basic unit (TSWA), 9B-1-9B-8 is an extension unit (TSWB) (However, in the drawing, the incoming highway 1-2, 1-3, 1-6, 1-7 , Dehighway 2-2-2
-7, basic units 9A-2 to 9A-7 and extension unit 9B
It omits about -2 to 9B-7. ).

The basic unit 9A-1 and the extension unit 9B-1 are obtained by dividing the time switch 3-1 in the conventional example so that they can be mounted separately.
M) 4-1 to 4-4 (However, in the drawing, the call path memory 4-
Omitted about 2,4-3. ) And control memory (SCM)
6, a selector (SEL) 10 for selecting any one of the speech path memories 4-1 to 4-4, an output of the selector 10 and an output of a selector in the expansion unit 9B-1 described later. Output highway 2-1
And a selector 11 to be connected to the extension unit 9B-1 and a speech path memory (SPM) 4-5 to 4-8 in the extension unit 9B-1.
(However, the call path memories 4-6 and 4-7 are omitted in the drawing.) And a selector 12 for selecting any one of the call path memories 4-5 to 4-8. Has been.

In addition, the communication path memories 4-1 to 4-8 in the basic unit 9A-1 and the extension unit 9B-1 are connected via the control information line 7.
Further, the selectors 10 and 12 are connected to the control memory 6 via the control information line 13 and the selector 11 is connected to the control memory 6 via the control information line 14, but between the basic unit 9A-1 and the extension unit 9B-1. Control information lines 7 and 13 and selector
For output line from 12 to selector 11, add-on unit 9B
Depending on the presence / absence of -1, it is connected or not connected.

The other basic units 9A-2 to 9A-8 and the extension units 9B-2 to 9B-8 are also divided into the time switches 3-2 to 3-8 in the conventional example so that they can be mounted separately. The basic unit 9A-1 and the extension unit 9B-1
Is configured similarly to.

Next, the operation of the device will be described. The manner of time slot conversion and highway conversion is basically the same as in the conventional example. That is, the entrance highway 1-1
The information input from 1 to 8 is written in the communication path memories 4-1 to 4-8 of one basic unit and extension unit, for example, 9A-1 and 9B-1, for 1024 time slots respectively, and the control memory 6 The time slot is converted and read according to the 10-bit control information sent from the device.

At this time, the information read from the channel memory 4-1 to 4-4 is transferred from the control memory 6 to the selector 10 by the selector 10.
Any one of them is selected according to the 2-bit control information sent to 10, and at the same time, the channel memory 4-
The information read from 5 to 4-8 is output by the selector 12
Any one of them is selected according to the 2-bit control information sent from the control memory 6 to the selector 12. Further, the information output from the selectors 10 and 12 is selected and output by the selector 11 according to the 1-bit control information sent from the control memory 6 to the selector 11.

Further, at this time, the information input from the input highways 1-1 to 1-8 is similarly processed and output in the basic units 9A-2 to 9A-8 and the extension units 9B-2 to 9B-8, As a result, the highways are converted and output to the respective output highways 2-1 to 2-8.

In addition, from the control memory 6, each of the call path memories 4-1 to 4-8
If the contents of the time slot conversion are the same, the control information sent to will be exactly the same as the control information of the conventional example, and the control information sent to the selectors 10, 12 and 11 will have the same contents of the highway conversion. If there is, it becomes exactly the same as the lower 2 bits and the upper 1 bit of the conventional 3-bit control information.

The time-division speech path described above is a basic unit including four speech path memories, a control memory, and two selectors in which time switches having a capacity corresponding to eight incoming highways and one outgoing highway are divided. And an additional unit including four channel memories and selectors as a mounting unit, each of which is 16 in total, and a total of 16 channel channels are combined in a matrix. FIG. 5 shows an implementation mode of the time-division speech path described in FIG.

Here, by using the time switch composed of the basic unit and the extension unit described above, the number of input highways and the number of output highways are four, that is, the input highways 1-1 to 1-
4 and the outgoing highway 2-1 to 2-4 only, it is realized by combining only the basic units 9A-1 to 9A-4 as shown in FIG. it can.

In this case, since it is not necessary to mount the extension units 9B-1 to 9B-4, that is, the portion of the time switch in which the incoming highway does not exist, an unused communication channel memory unlike the conventional example does not occur.

In the embodiment, the number of input highways in each of the basic unit and the extension unit is four, and the number of input highways in one time switch composed of these is eight, but the number is not limited to this. . Further, in the embodiment, one time switch is composed of one basic unit and one extension unit, but the present invention is not limited to this. Furthermore, in the embodiment, the time switch that connects a plurality of incoming highways to one outgoing highway is combined by the number of outgoing highways. The same can be applied to a time-division speech path in which time switches connected to any one of the clothing are combined for the number of incoming highways.

FIG. 7 is a graph showing the effect of saving the communication path memory by the time division communication path of the present invention in comparison with the case of the conventional time division communication path. Here, the maximum value of the number of incoming highways or the number of outgoing highways is N, the number of speech path memories provided in one basic unit is n, and in the case of N = 8 and n = 4, FIG. ) Is N = 8 and n = 2, the same figure (c) is N
= 8 and n = 6 are shown respectively.

In the figure, the solid line bar graph shows the number of call path memories according to the present invention, and the broken line bar graph shows the number of call path memories according to the conventional time-division call path. If the number is n or less, it can be seen that the present invention can save the number of channel memory in comparison with the conventional time-division channel in any case (however, the number that can be saved varies depending on the value of n. Although not shown, it also changes depending on the value of N).

(Effects of the Invention) As described above, according to the present invention, each time switch forming a time-division speech path is divided into a basic unit and an extension unit that can be separately mounted, and the basic unit has the number of incoming highways. Alternatively, n speech channel memories having a maximum number N of outgoing highways less than N, a control memory, a first selector for selecting any one of the n speech channel memories, and the first selector. And a second selector for selecting one of the outputs of the expansion unit, and the expansion unit includes (N−n) or less speech path memories and (N−n) Since the selector for selecting any one of the following speech path memories is provided, the number of incoming highways or outgoing highways of the time division speech path to be constructed is n.
In the case of less than or equal to the number of times, the time division speech path can be constructed by mounting only the basic unit of each time switch, and thus, as in the conventional case, there is no input highway or output highway in each time switch. It is possible to reduce or eliminate the call path memory corresponding to the above, that is, to reduce or eliminate the call path memory that is not used at all, and the number of incoming highways or outgoing highways of the time divisional call to be constructed is If there are more than one, the time-division speech path can be constructed by mounting the extension unit together with the basic unit of each time switch. There is an advantage that a time-divisional communication path can be constructed.

[Brief description of drawings]

FIG. 1 is a block diagram showing an embodiment of a time division speech path of the present invention, and FIG. 2 is a construction diagram showing an example of a conventional time division speech path,
FIG. 3 is a diagram showing an implementation mode of a conventional time division speech path, and FIG.
FIG. 5 is a diagram showing another implementation mode of the conventional time division speech path, FIG. 5 is a diagram showing an implementation mode of the time division communication channel of the present invention, and FIG. 6 is another implementation of the time division communication channel of the present invention. FIGS. 7 (a), 7 (b) and 7 (c) are graphs showing the effect of saving the communication channel memory according to the present invention. 1-1 to 1-8 …… Incoming highway, 2-1 to 2-8 ……
Exit highway, 4-1 to 4-8 ... Channel memory, 6 ...
... Control memory, 7,13,14 ... Control information line, 9A-1 to 9A-
8 ... Basic unit, 9B-1 to 9B-8 ... Expansion unit, 10,11,12 ... Selector.

Claims (1)

[Claims] 1. A plurality of communication path memories corresponding to the number of incoming highways or the number of outgoing highways and a control memory are provided, and any one of the incoming highways is connected to one outgoing highway or one incoming highway. In the time-division speech path, the time switches connected to any one of the outgoing highways are combined so that the number of outgoing highways is equal to the number of incoming highways. The switch is divided into a basic unit and an expansion unit that can be mounted separately, and the basic unit has n speech path memories with a maximum number N of incoming highways or outgoing highways less than N, a control memory, and the n A first selector that selects any one of the communication path memories of the above, and one of the output of the first selector and the output of the extension unit. And a selector for selecting any one of (N−n) or less speech path memories and (N−n) or less speech path memories in the expansion unit. A time-division speech path characterized by having and.