JP2830741B2 - Cross connect method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cross-connect system used in digital circuit switching for connecting a communication path in both directions, and particularly for circuit switching in which time slots are exchanged using a time switch.

[0002]

2. Description of the Related Art Conventionally, a cross-connect device used for circuit switching is configured as shown in FIG. In this device, a receiving line 1 in which a plurality of paths are multiplexed is connected to a selector 3. The selector 3 is a path termination control unit 5
When the time switch 6 of the cross connection unit 13 is not connected, that is, when the time switch 6 is an empty circuit path, the path is connected to the path terminating circuit 4. 6, the cross-connect processing is performed.

In the cross connection unit 13, the path setting control unit 7 controls the time switch 6 so that the multiplexed paths from the connection termination unit 12 exchange time slots in path units. . The signal whose time slot has been exchanged is sent to the connection termination unit 1.
2 selector 10. The selector 10 is controlled by an idle pattern generation control unit 11 to transmit a signal from the cross connection unit 13 to the transmission line 2 or to transmit an idle pattern from the idle pattern generation circuit 8 or 9. The transmission line 2 transmits an idle pattern to an empty line path, and which idle pattern is transmitted is determined by the characteristics of the line.

[0004]

However, in such a conventional method, at the time of setting a path, it is necessary to release the termination of the input path at the connection termination unit, release the insertion of the idle pattern to the output path, and connect the time switch. There is. When the path connection is released, it is necessary to terminate the input path in the connection termination unit, insert an idle pattern into the output path, and release the connection to the time switch. As described above, since the cross-connect control is distributed, it becomes a factor of deteriorating the processing capacity for a request to immediately re-set a plurality of paths, such as a download of a path setting and an emergency start-up. Had issues. The present invention has been made in view of such a situation, and is intended to easily respond to a request for resetting a plurality of paths.

[0005]

In order to solve such a problem, the inventions according to the first and second aspects of the present invention transmit a control signal corresponding to the control information at the time of controlling a time switch and analyze the control information. Then, based on the analysis result, the vacant line path among the receiving side lines is terminated, and the vacant line path among the transmitting lines transmits an idle pattern.

[0006]

The cross connection unit transmits cross connect information and a signal indicating which path is a free line path using the free time slot. This signal is analyzed by the decoder at the connection terminating unit side, and the idle receiving line is terminated by the path terminating circuit according to the analysis result.
An idle pattern is transmitted to an empty line path of the transmission line.

[0007]

Next, the present invention will be described with reference to the drawings. FIG. 1 is a block diagram showing an embodiment of the present invention.
Is connected to the cross connection unit 13 or the path termination circuit 4 via the selector 3 in the connection termination unit 12. A signal subjected to cross-connect processing from the cross connection unit 13 or a signal from the idle pattern generation circuits 8 and 9 of the connection termination unit 12 is selected and output to the transmission line 2 by the selector 10.

The selectors 3 and 10 operate based on the signal from the cross connection unit 13 in a manner to be described later.
5 is controlled. The path terminating circuit 4 performs a terminating process of an empty line path among the multiplexed paths. Also, idle pattern generating circuits 8 and 9
Is for transmitting a fixed idle pattern to an empty line path on the transmitting side.

The cross connection unit 13 is a time switch 6 for making an arbitrary connection for each path from the connection terminating unit 12 in path units, an instruction of path connection / non-connection to the time switch 6, Path setting control unit 7 for instructing the type of idle pattern, time switch 6
Of the control information from the path setting control unit 7 for each path, encodes the connection / non-connection instruction and the idle pattern type instruction information at the time of non-connection, and sends it to the corresponding path.
It has a pattern insertion circuit 14 for inserting into a vacant time slot of the multiplexed signal .

The device configured in this manner is transmitted from the cross connection unit 13 to the corresponding path , that is, the time switch 6.
The path connection / non-connection instruction and the idle pattern type instruction information at the time of non-connection are inserted into the empty time slots of the multiplexed signal transmitted to the path to which is connected. This is sent to the connection termination unit 12, and the inserted information is analyzed by the decoder 15 provided therein.

As a result, the decoder 15 controls the switch 10 so as to transmit an idle pattern to an empty line path of the transmission side signal 2 based on the analyzed result. The switch 3 is controlled so as to be terminated by the circuit 4.

[0012]

As described above, according to the first and second aspects of the present invention, the control information of the time switch is transmitted through an empty time slot, the control information is analyzed, and the switch is controlled based on the analysis result. Accordingly, even when the control elements are not distributed to various places and the path is changed, the control can be performed only by the analysis result, and thus there is an effect that it is easy to cope with a change in the system.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a configuration of one embodiment of the present invention.

FIG. 2 is a block diagram showing a configuration of a conventional example.

[Explanation of symbols]

1: transmission line, 2: reception line, 3, 10: switch, 4
... Path termination circuit, 6 time switch, 7 path setting control unit, 8, 9 idle pattern generation circuit, 12 connection termination unit, 13 cross connection unit, 14 pattern insertion circuit, 15 decoder.

Claims (2)

(57) [Claims] 1. A method according to claim 1 , wherein each path is multiplexed.
Time switch and time slot
And a path setting control unit for controlling the time switch.
One of the outputs connected to the cross connection section and the receiving side line is the time switch
A first selector connected to the output of the first selector.
A path termination circuit connected to the other of the forces, the first selector
Termination control unit that controls the switching of
Multiple idle pattern occurrences that generate a dollar pattern
Road, signal from the time switch or the idle
In response to the idle pattern output from the pattern generation circuit
A switch having a second selector for selecting and outputting either
And a plurality of connection terminators, and terminates an unused line path among receiving lines having a plurality of paths.
End, idle pattern in empty line path among transmission lines
And the line used is cross-connected by the time switch.
Cross-connect system that performs tatto processing and sends it to the transmission line
The path setting system provided in the cross connection unit.
A connection / non-connection instruction for each path of control information from the
And idle pattern type indication information when not connected
A control signal corresponding to the control information of the time switch;
Its empty time slot according to the output of the time switch
A pattern insertion circuit to be inserted into the connection end portion;
The control signal in the signal sent from the
And a decoder for analyzing, on the basis of the analysis result of said decoder, said first selector
The receiver terminates the free line path among the receiving lines and sends
An idle line path sends an idle pattern
A cross-connect method characterized by the following. 2. The method according to claim 1, wherein the control signal is transmitted via an empty time slot.
And a cross-connect method.