JPS6269797A - Space switching device for time division channel - Google Patents

Abstract

PURPOSE:To substantially synchronize input and output signals with a space switch by providing a circuit for sending a signal to a space switch module and relaying it to other switch module and disposing a variable delay circuit compensating a delay. CONSTITUTION:An input terminal A is connected to a receiving circuit 102 and a circuit 102 has an elastic function for absorbing the variation of a phase generated when a signal is transmitted from other switch module. The output 104 of the circuit 102 is connected to a transmission circuit 106 and a delay circuit 108, and the circuit 108 varies the quantity of delay. The quantity of delay is controlled by a delay control circuit 116. Similarly, an input terminal D of a switch module 100 is connected to a receiving circuit 118 and the circuit 118 has also the elastic function and absorbs the variation of the phase generated when the signal is transmitted from other switch module. The output of the circuit 118 is connected to a transmission circuit 126 through an OR circuit 112 and the output is connected to an output terminal C.

Description

DETAILED DESCRIPTION OF THE INVENTION 3. First and second aspects of the invention (Industrial Application Field) The present invention relates to a tunnel switching system, and particularly to a space switching device constituting a time-division communication path thereof.

(Prior Art) A so-called TST type time-division communication path, which is composed of two time switches and one space switch between them, has the following characteristics:
For example, Ken Sanpei, ``Method for configuring large-scale time-division communication paths,'' published in 1981, Proceedings of the National Conference of the Information and Systems Division of the Communication Society, and Patent Application No. 1983-24300.

In these conventional time-division channels, a single time-division channel switch module includes a set of primary time switches, spatial switches, and secondary time switches. Other similar modules are equipped with a transmitter circuit and a receiver circuit with an elastic circuit that absorbs phase variations between modules, and are connected by inter-module cables. Connections of the temporal and spatial switches within the same module include delay circuits configured to adjust the signal and phase through the connections between the modules.

(Problems to be Solved by the Invention) The time division communication path switch module in such a conventional example has a number of channels that is 1/4 of the maximum station size. Therefore, it is possible to expand the system in units of 1/4 of this maximum scale. However, it does not meet the demand for detailed expansion of channels with a number of channels higher than RI, and therefore the economical efficiency of expansion is difficult.

Therefore, it is an object of the present invention to eliminate the drawbacks of the prior art and to provide a space switching device for time-division communication paths that can be expanded to any desired scale up to the maximum scale.

(V Vi for Solving the Problems) In order to solve the problems mentioned in 1-1, the present invention uses a TST type time switch consisting of a primary time switch, an inter-company switch, and a secondary time switch;
``Constituting the structural unit of the space switch in the 3 communication paths,
Time and minutes that are combined to form a space switch; 1.
In a single channel spatial switching device, the spatial switching device has a spatial switching circuit that makes arbitrary connections between input and output signals, and has an elastic function to connect signals from the primary time switch or other spatial switching devices. 1st to receive
a receiving circuit, a first transmitting circuit that transmits the received signal 5 to another space switch device, and a variable delay 4 that delays the received signal and inputs it to the space switch circuit, and delays this signal. a second receiving circuit having an elastic function and receiving a signal 5) from another space switch device; receiving a signal from the space switch circuit and delaying the signal; A second delay circuit means whose delay rate is variable for delaying this signal, and the outputs of the second receiving circuit and the second delay circuit means are logically summed and sent to a secondary time switch or other space switch device. This includes a transmitting circuit for a transmitter 2.

(Function) According to the present invention, the first transmitting circuit of the space switch device as a 4II component of the empty 1111 switch transmits a signal from the primary time switch or another space switch device to another space switch device. Relay. The first delay circuit means:
The delay caused by the cable between the first transmitting circuit and the switching device is compensated for, and the delay 15 is variable. by this,
All signals input to the space switch circuit in the space switch device are substantially synchronized (+i).

In addition, the second sending circuit 18 is configured to logically OR the signal from the space switch device to the other space switch device or the secondary time switch with 4'T'j from the other space switch device. Relay. The second and detour compensate for the delay that occurs in the cable between the second transmission circuit and the switching device, and the delay is τIr from the first one. The signals output to the spatial switch device and the secondary time switch are all substantially synchronized 418 signals.

(Example) Next, the present invention will be explained in detail with Retsuketsu blood + iT + detailed explanation 1! 1
1 to 0 In order to facilitate understanding of the present invention, an example of a time/minute 1 channel space switching device according to the prior art will be described before explaining the embodiments of the present invention. .

In the conventional TST type time/minute/1m channel illustrated in FIG. 3, primary time switches 50 to
53. One set of space switches 20 to 23 and one set of secondary time switches 60 to 63 are dependent on PiS.

The network module with the module number l (1 = an integer from 0 to 3) includes a transmitting circuit a1 and a receiving circuit bl equipped with an elastic circuit that absorbs phase variations in connections between network modules.
is installed. The connection between the output of the primary layer II) 1 switch 51 of the network module l and the space switch 21 of the network module of the other module number m is the connection between the transmitting circuit al and the inter-module cable connected to the circuit. This is done by connecting via Jl11.

The output of the primary time switch 51 in the same module is also connected to the spatial switch 21 through a delay circuit el. 11: Detour e1 is connected to connection j1 within the same module
1 with a delay in the signal appearing at connection jl
+ signal phase is set to be substantially synchronized with the phase of the signal received by the receiving circuit b1 from the other module m. As a result, the space switch 21 in each module
The phase of 0 so input into is unified, and it becomes 5 times period doki ka'i no.

Similarly, on the output side of the space switch 21, the network module l includes a transmitting circuit cl and a receiving circuit d1 equipped with an elastic circuit that absorbs phase variations in the connections between the network modules. It is listed on S. The connection between the output of the spatial switch 21 of the network module l and the secondary time switch 6m of the network module of another module number -Jm is to connect the transmitting circuit c1 to the receiving circuit dll by an inter-module cable k1m. It is done by

The output k11 from the space switch 21 in the rotation module to the module 1 is connected to the secondary time switch 6I through the d detour fl by ORing with the output from the receiving circuit d+. Delayed episode! ISf+ delays the number 6 appearing on connection kl+ in the same module by 'J,
Moreover, this delay is set to a value that substantially rotates the signal phase of the connection k11 to the phase of the signal received in the receiving circuit d1 from the other module m.

As a result, the phases of the signals manually input to the secondary time switches 61 in each module are unified, and the synchronous operation becomes [111].

Each of the time-division channel switch modules 0 to 3 in such a conventional example has a maximum number of channels of 174 channels. Therefore, it is possible to increase the number of stations in units of 174, which is the maximum station size. However, the number of channels in this expansion range could not meet the demand for detailed expansion, and therefore it was difficult to make expansion economical.

With reference to FIG.
jt's space switch module 100 has a larger capacity 111. The input terminal A is connected to the receiving circuit 102. Receiving circuit +02 is connected to other switch module 10
It has an elastic mechanism that absorbs phase variations that occur when 0 to 0 signals are transmitted.

The output 104 of the receiving circuit 102 is connected to the transmitting circuit 10B and d
The extension circuit is connected on 10th. The output of the transmitting circuit 108 is connected to the output terminal fB. The delay circuit ioa is
Nobu H, + or IIf change, human power 104 F7) Shin'
3 D. Add a extension to space switch 110 manpower +1
2 is a human-powered circuit. The delay col is the control end f4
It is controlled by a delay control circuit 11B connected to 14.

These input/output terminals FA and B and their related circuits 102,
108 and 116 are space switch + 10 human power 11
1 out of 2 was lost.

Similarly, the input terminal J'-D of the space switch module 100
is connected to the receiving circuit 118. Receiving circuit 118
It also has an elastic function and absorbs phase variations that occur when signals are transmitted from other switch modules 100.

An output 120 of the receiving circuit 11B is connected to one input of an OR circuit 122. Output 124 of OR circuit 122
is connected to the transmitting circuit 12B, and the output of the transmitting circuit 128 is connected to the output terminal C. The other input 128 of OR circuit 122 is connected to the output of delay circuit 130.

The input 132 of the delay circuit 130 is a space switch (Sij)
+10 output. The delay circuit 130 also has a variable delay, so it can delay the signal from the human power 132! This is a circuit that applies manual power to the human power 128 of the OR circuit 122. The delay I4 is controlled by another delay control circuit 13B connected to the control terminal +34. These input/output terminals C and D and their associated circuits 118, 126, 130 and 13B are provided for the output 132 of the space switch +10.

The space switch 110 is a connection circuit that establishes an arbitrary connection between the signal at the input 112 and the signal at the output 132, and realizes the function of a space switch in a conventional time-division communication channel.

By combining a plurality of such small space switch modules 100, it is possible to configure a space switch of any size having eight channels larger than this.

An example is shown in FIG.

In the configuration example shown in FIG. 3, a space switch having a total of n incoming and outgoing lines is constructed by 16 small capacity space switch modules 100 each having n/4 incoming and outgoing lines. These 16 modules +00 have coordinate positions in the space switch Hlj(i, j=o, 1.2.
3) and the module 100 shown in FIG. 2 is advantageously used. n/4 big end FA of each module Hij
ijk, old 'k, and out-end f-Bijk, Dijk
(k=o, l, . . . n/4-1) are input terminals /-A, D and output terminals /-B, C, respectively, of the module 100 shown in FIG.

For example, the input terminal f-AOOk of the module HOO is connected to the transmission circuit PTOk of the primary time switch in the preceding stage by a cable 000k, and the output terminal p-Boo
k is connected to the input end of module HOI/−AO1k by cable d01k.

Similarly, the input terminal j-Aijk of the H-th module is connected to the output terminal r-Bi (j-1).
)k,! = Connected by cable dijk.

Output terminal Bi3k of module old 3 is not used.

The delay resistance R11jk of the delay circuit 108 provided for the human input signal of the Hth module mk number 1-1 is as follows.

However, l1lilk is the delay j4 of the transmitting circuit 10B and cable dilk, DIlk is the delay amount of the receiving circuit with elastic function, and RIi3k is the arbitrary delay acid of the delay circuit installed for the th input signal in module old 3. be.

By setting the delay QRIi3k to an arbitrary fixed value and absorbing the deviation of the delay amount of the transmitting circuit and cable using the elastic function,
) can be a fixed value rJ1, and the delay EikRIj
jk will not depend on (i, k). That is,
The delay 1-2 required within each module old depends on j.

The input signal to the spatial sweep 7,000 toward module H has a delay of 1. j: and the delay added to this +1i Rr i j k, and the cable drive circuit of the primary time switch and the cable condition are DIi
If it is OK, then it becomes. As mentioned in , this does not depend on (i, k),
And as shown in the formula, it is also fixed for j. This equation also shows the phase delay of the space switch of module H Tsuta 3 when the human power is 0, and each module old J is unified with the phase delay of module old 3, and the space switch human power signal is rotated. It shows that there is.

The output terminal (-COOk) of module I (00 is connected to the input terminal DIOk of module HIO by cable dlOk. Similarly, the input terminal D of module Hij is connected to the input terminal DIOk of module HIO.
ijk is the output terminal C(i
-1) Connected to j by cable dijk. The output terminal of each module of the module H3j is connected to the receiving circuit 5Tjk of the secondary time switch in the primary stage. In addition, the input terminal f DO of module HOO
Ok is not used. Also, input terminal Dojk of module HOj is not used.

' arranged for the th output signal of module H1j
The delay amount ROijk of the N delay circuit 130 is as follows.

However, DClm j k is the delay jj1 of the OR circuit 122, the transmitting circuit 128, and the cable dilk, DOk is the delay amount of the receiving circuit with elastic function, and ROOjk is the 6th output 6 in the module IJOj.
It is an arbitrary delay in the extension circuit that one was left behind for a long time.

By setting delay:j:ROOJk to an arbitrary fixed value and absorbing the deviation of delay j1 of the circuit and cable with the elastane ink function, (DO+
sjk+00(signal+I)k) can be a fixed value DO, and the delay 7j:ROijk will not depend on (i,k).

That is, the inevitable delay jI8 in each module old j is j
Depends on.

As described above, the spatial switch 110 in each module HiJ has the same configuration, its operation delay is fixed, and all phases are aligned at the input.

Therefore, after calculating the delay ROijk based on this belief, the OR circuit 122 of the other module and the transmitting/receiving circuit 102.108.118. I26, the delay added by the cable to the input7. HΣ(DOmjk+DO(m
+1)k) 1=0 The sum is the delay j in the receiving circuit 5Tik of the secondary time switch.
I), which becomes . However, 5Tik includes the slow gDo(i+1)k due to the elastic function.

As mentioned above, this does not depend on (i, k) and is also fixed for i as shown in the equation. This equation also shows the phase lag of the output signal of the spatial switch of module HOj to the secondary time switch, and for each module Hi
This shows that j is unified to the phase delay of module HOj, and the receiving circuit of the secondary time switch has the same phase.

In this way, in this embodiment, from the primary time switch to the small chamber
Circuits 102 and 106 are provided to relay signals to the H and B space switch modules 100 between the phase pressures of the small room space switch modules 100, and a delay circuit 102 and 106 is provided to compensate for the delay caused by this relay circuit and the inter-module cable. strange ′j
I! An extension circuit 108 and a control circuit l16 are provided. Therefore, all human input signals to the spatial switches 110 within the switch module 100 are substantially synchronous signals.

Also small room 1. i: Space switch module 100 to 2
A circuit 118゜122, 1 that relays the signal to the next time switch while calculating the logical sum between the switch modules 100.
26, and a delay circuit 130 with a delay of 1 to Or to compensate for the delay caused by this relay circuit and the inter-module cable.
and a control circuit 136. therefore,
All signals from the switch module 100 to the secondary time switches are substantially synchronous (11).

This makes it possible to use Komurohani's space switch module of any size to construct a larger space switch of any size.

(Effects of the Invention) As described above, according to the present invention, a space switch module as a structural unit of a space switch is provided with a circuit for relaying a signal from a primary interlayer switch or another switch module to another switch module, A variable delay circuit is provided to compensate for the delay caused by the relay circuit and the inter-module cable. In addition, a circuit is provided that relays the signal from the spatial switch module to another switch module or secondary time switch while calculating the logical OR with the signal from the other switch module, and compensates for the delay caused by this relay circuit and the cable between the modules. delay early (i
A +7 variable delay circuit is provided.

As a result, all signals input to and output from the space switches in the space switch module become substantially synchronous signals.

Therefore, a small R1#'l space switch module of any size can be used as a structural unit, and a larger one, α
It is possible to construct a spatial switch with a scale of . Therefore, the space switching device for time-division communication channels according to the present invention can be expanded up to a maximum scale of .alpha.

[Brief explanation of drawings]

FIG. 1 is a block diagram showing an example of a module configuration of a conventional TST type time-division communication path. 7FJ2 is a block diagram showing the configuration of an embodiment of the space switching device for time-division communication paths according to the present invention, and FIG.
Small room shown in Figure S2; multiple M 5 space switch modules
1 is a block diagram showing an example in which a space switch with a larger capacity t, H, and scale is configured. Explanation of the numbers of L coparts too, Hij, , space switch module 102.
118. , receiving circuit 108.126. , transmission circuit 110, Sij, , space switch 108.1301. Delay circuit 116.130. , Delay control circuit A, D, , , Input end f B, C, ..., Output end r- Patent applicant Oki Electric Industry Co., Ltd. Agent Takao Katori Oki Maruyama Figure 1

Claims (1)

[Claims] 1. A time division device that constitutes a structural unit of a space switch in a TST type time division communication channel consisting of a primary time switch, a space switch, and a secondary time switch, and which is combined to form the space switch. In a space switch device for a communication path, the space switch device has a space switch circuit that makes arbitrary connections between input and output signals, and an elastic function, and has a signal from the primary time switch or other space switch device. a first receiving circuit that receives the signal; and a first receiving circuit that transmits the received signal to another space switch device.
a first delay circuit means that delays the received signal and inputs it to the space switch circuit, and has a variable delay amount for delaying the signal; a second receiving circuit that receives a signal from the switch device; a second delay circuit that receives a signal from the spatial switch circuit and delays the signal, and the amount of delay by which the signal is delayed is variable; and a second transmitting circuit for calculating the logical sum of the outputs of the second delay circuit means and transmitting the result to the secondary time switch or other spatial switch device. Space switch device. 2. In the space switch device according to claim 1, the space switch has a scale of NxN (N is a natural number), and the (i, j)th (0≦i,
The first space switch device constituting the structural unit of j≦N
The delay amount RIijk of the delay circuit means is RIijk=Σ
^N_l_>_j(DIilk+DIlk)+RIi3
k, where DIilk is the delay amount of the first transmitting circuit and the cable connected to it, DIlk is the delay amount of the first receiving circuit, and RIi3k is the delay amount of the (i, N)th space switch device. A space switching device characterized in that the delay amount is the delay amount of the first delay circuit means for the k-th output. 3. In the space switch device according to claim 1, the space switch has a scale of NxN (N is a natural number), and the (i, j)th (0≦i,
j≦N)
The delay amount ROijk of the delay circuit means is ROijk=Σ
＾＾−＾1_m_=_0(DOmjk+DO(m+1
)k)+RO0jk, where DOmjk is the delay amount of the second transmitting circuit and the cable connected to it, DOk is the delay amount of the second receiving circuit, and RO0jk is the (0, j)th corresponding space. A space switch device characterized in that the amount of delay is the delay amount of the second delay circuit means for the k-th output of the switch device.