JPH03274819A - In-equipment signal route switching method - Google Patents

Abstract

PURPOSE:To remarkably reduce the hit time of a signal by performing the selective connection of a second system in advance when the signal route of a first system is switched to that of the second system, after that, performing the switching of the first and second systems of a transmission part, and performing the disconnection of the first system finally. CONSTITUTION:A state is switched, for example, so as to select and output the second system signal NB of an input signal IN. Firstly, the connection control processing of a selection part 3 is performed at the selection part 3 of the second system so that the second system signal NB of a reception part IN can be selected and can be connected to output 31b. Secondly, the switching control processing of the transmission part 41 is performed at the transmission part 41 so that the signal 41B of the second system instead of the signal 41A of the first system can go to output 01. Afterwards, when the disconnection to control the system set in a connecting state to a disconnecting state is performed normally at the selection part 2 of the first system, the switching of the system can be completed normally.

Description

DETAILED DESCRIPTION OF THE INVENTION Technical Field The present invention relates to a method for switching signal paths within a device, and more particularly to a control method for switching between two signal paths when there are two signal paths within a device.

Prior Art Switching of signal paths within a certain device is performed when the signal path needs to be changed due to maintenance of the device, etc. In this case, the paths for multiple human input signals and multiple output signals are internally switched. This is done using a switching cross-connect device or the like.

For example, a circuit having the configuration shown in FIG. 2 may be used.

In the figure, N input signals 1 to IN are each
The signals are input to N receiving sections 11 to IN each having a function of distributing the input to the second system.

Each of these N receivers 11 to IN has two output systems (
IA, 1B), (2A, 2B), ...... (N
A, NB), and the output group IA- of the first system
NA is N human power 21a to 2Na of the selection unit 2 corresponding to the first system having a human power of NUN. Moreover, the output group IB-NB of the second system is N human power 31a to 3Na of the selection unit 3 corresponding to the second system, which have the same input/output of <NUN.

Each of these selection units 2 and 3 has N human power groups (21
a, -., 2Na) and (31a, ., 3Na) to each of N output groups (2l b, ... 2Nb)
and (31b, . . . , 3Nb).

Output signal 01 by selectively selecting the first and second systems respectively
~ N transmitters 4 with input/output ratio of 2:1 to be turned on
1 to 4N are provided. The transmitter 41 has first and second
A pair of corresponding selection outputs 21b and 31b of the system selection units 2 and 3 are operated by two people, and one of them is outputted as an output signal 01 to the outside.

The transmitter 42 outputs a corresponding set of selection outputs 2 from the selection units 2 and 3.
2b and 32b are operated by two people, and one of them is output signal 02.
Externally as The same applies to the other transmitters 43 to 4N.

In such a configuration, as shown in FIG. A case will be described in which the first system signal of the input signal IN is switched to the second system signal of the Nth human input signal IN and is sent to the outside.

At this time, the selection unit 2 of the first system is controlled to disconnect the selection connection, the transmission unit 41 is controlled to switch between the first and second systems, and the selection unit 3 of the second system is controlled to connect the human power 3Na. Control for selectively connecting the output 31b is required.

Conventionally, the above-mentioned three controls are performed simultaneously, which has the drawback of a long momentary interruption time of the transmission signal to the outside.

Purpose of the Invention The present invention has been made to eliminate such drawbacks of the prior art, and its purpose is to further shorten the momentary interruption time of the signal when switching the route of the signal system. An object of the present invention is to provide an intra-device signal path switching method that allows for the switching of signal paths within a device.

Structure of the Invention According to the present invention, there are N receiving means each having a function of distributing an input signal from the outside to a first and second system, and a receiving means provided corresponding to the first and second systems, respectively. , each N
N inputs and outputs for each of the first and second systems.
first and second selection means for selectively connecting arbitrary inputs of the first and second systems to arbitrary outputs using manual input signals; an in-device signal path including N transmitting means for selectively deriving the inputs of the first system and the second system, respectively, using mutually corresponding outputs of the selection means as inputs of the first system and the second system; A method for switching a switching circuit, the method comprising: a first step of controlling a selection state of the second selection means; a second step of controlling an alternative selection state of the transmission means; and a third step of controlling the selection state of the first selection means to an off state.

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

FIG. 1 is a flowchart showing the operating procedure of an embodiment of the present invention, and is an example when applied to the cross-connect device shown in FIG. 2.

From the state shown in FIG. 2, that is, the state in which the first system signal NA of the Nth human input signal IN is selected and output, the state shown in FIG. 5, that is, the second system signal NB of the input signal IN is selected and output. The case of switching to the state will be explained.

First, in the selection unit 3 of the second system, the second
Connection control processing is performed for this selection unit 3 so that the system signal NB is selected and connected to the output 31b (step 51). If the selection unit 3 is connected normally (Y in step 52)
ES), the state shown in FIG. 3 will occur.

Next, in the transmitter 41, a switching control process is performed for the transmitter 41 so that the second system signal 41B becomes the output 01 instead of the first system signal 41A (step 53). If the switching control of the transmitter 41 is normal (YES in step 54), the state shown in FIG. 4 will be reached.

Thereafter, in the selection unit 2 of the first system, the connected state is controlled to be disconnected (step 55). If the cutting is performed normally (YES in step 56), the fifth
The state shown in the figure is reached and the system switching ends normally (step 57).

If the selective connection is not performed normally in step 51 (NO in step 52), it is determined that system switching is not possible and the process ends. Further, if the switching process in step 53 is not performed normally (NO in step 54), the second system selection unit 3 is returned to the state before the process in step 51 (step 58).
), it ends as switching is not possible.

Further, if the disconnection process in step 55 is abnormal (No in step 56), the states of the selection section 3 and the transmission section 41 are returned to the states before steps 51 and 53 (step 5
1), the process ends as switching is not possible (step 60).

Effects of the Invention As described above, according to the present invention, when switching from the first system to the second system signal path, the second system is selectively connected in advance, and then the signal path of the transmitter is connected. 1,
Since the two systems are switched and the first system is finally disconnected, the momentary interruption of the output signal to the outside of the device is only when the system is switched in the transmitter, so the momentary interruption of the signal is minimized as much as possible. This has the effect of making it possible to shorten the length.

[Brief explanation of drawings]

FIG. 1 is an operational flowchart of an embodiment of the present invention, and FIGS. 2 to 5 are circuit diagrams showing states at each step when switching signal systems. Explanation of symbols of main parts

Claims (1)

[Claims] (1) N receiving means each having a function of distributing external input signals to a first and second system; a first having an input and an output, receiving each of the N input signals of the first and second systems as input, and selectively connecting any input of each of the first and second systems to any output; and a second selection means, each using the corresponding outputs of the first and second selection means as inputs of the first system and the second system, and selecting the inputs of the first system and the second system, respectively. A method for switching an in-device signal path switching circuit including N transmitting means that uniformly derives N transmitting means, the method comprising: a first step of controlling the selection state of the second selecting means; An intra-device signal path switching method comprising: a second step of controlling an alternative selection state; and a third step of controlling the selection state of the first selection means to an off state.