JP2806138B2 - Switching control method in wireless system - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a radio system in which a plurality of radio stations are cascaded to transmit a signal, such as a digital radio system, and in particular, each of the radio stations has a plurality of n active systems and one radio system. In a wireless system having a standby system and being switched between each other by an external control command, a maintenance person who performs maintenance and inspection work on a specific working system that has received a switch instruction to the standby system at an arbitrarily designated wireless station. And a switching control method for performing the switching. In the switching control method in the wireless system, it is necessary to prevent a maintenance person from accidentally shutting down an active system other than the active system to be maintained by being instructed to switch to the standby system.

[0002]

2. Description of the Related Art In a conventional radio system, a state variation (fading, etc.) of a spatial propagation path between cascaded radio stations.
In order to avoid deterioration of the line quality of receiving the transmission signal from the previous station and transmitting it to the next station, although not shown, a plurality of n
When one spare system SP is provided in addition to the active systems M1 to Mn (for example, n = 9), and the maintenance person carries out work such as inspection and maintenance of any one active system Mi on a real line. Is
The active system Mi is forcibly switched to the spare system SP, and maintenance work on the specific active system Mi is performed without any trouble in line operation.

[0003]

Recently, however, a line for switching one Mi of the active systems M1 to Mn of each radio station to the standby system SP by a control command from a remote centralized monitoring control station. Switching is being performed, and the maintainer performs necessary maintenance work on the active system Mi, which has switched to the standby system SP at each wireless station upon receiving a switching control instruction from the centralized monitoring control station. Since the current configuration is complicated and there is no clear indication on the active system Mi that switches to receive the switching instruction to the spare system SP, the maintenance person mistakenly removes the other active systems M1 to There is a problem that Mn is cut off. An object of the present invention is to provide an active system M1 to Mn different from a specific active system Mi which is switched in response to a switching instruction to the standby system SP.
Is to realize a switching control method in a wireless system without an operation error that a maintenance person accidentally turns off.

[0004]

SUMMARY OF THE INVENTION The basic configuration of the present invention for this end, as shown in FIG. 1, as shown in FIG. 3, for example, the radio station specified by the switching instruction "1" from the control station ,
Rusabu can the power supply to the given active system to the cross-sectional
Provide a switch . Then, the switching instruction “1” and the sub
AND of the output signal "1" when the switch is on
Using the output “1”, the operation of the switching oscillation circuit
By stopping, the breaker NFB is activated and the power
Power supply to the system switched from the supply board to the spare
Cut off. Alternatively, there is provided a display means for displaying that the designated active system has been switched to the standby system (hereinafter, abbreviated as “currently being switched”).

[0005]

According to the present invention, the radio system 21 designated by "1" of the switching command "0/1" from outside receives the "1" of the switching command SYS CONT to the spare system SP in the working system. As described above, using the sub-switch 1i provided only for Mi ,
The output of the power supply to the active system Mi to cross. one
On the other hand, the other active system receiving the switching instruction SYS CONT "0"
Sub-switch ₁ 1 ~1 _n of the beam is, the scan for the AND output is "0"
The switching oscillation circuit cannot be turned off, and the output of the power supply cannot be turned off . In addition, the active system that has received the switching instruction SYS CONT "1" to the spare system SP
The display means 2i for only Mi indicates that the switching is currently being performed. Therefore, the system is switched to the standby system SP in response to the switching instruction "1" from the external, for example, the centralized monitoring and control station 10, and is used in a different system from the current system Mi to be maintained.
There is no operation error in which the maintenance personnel mistakenly cuts off the power supply to M1 to Mn and disconnects the line.

[0006]

FIG. 2 is a block diagram showing the overall configuration of a switching control system in a wireless system according to an embodiment of the present invention, and FIG. 3 is a block diagram showing the configuration of a power supply panel of each active and standby system of each wireless station. . Each power supply board PS provided in each system of each wireless station in FIG. 3 is provided with the sub-switch 1 and the display means 2 of the present invention. In the overall configuration shown in FIG. 2, the monitoring and control device of the wireless station 21 at one end serving as the monitoring and control station
The control console 10 of the AS, for each monitoring and control device AS of the cascaded radio stations 21, 22, and 23, the n active systems M1 to Mn
Of, whether the switching instruction "1/0" switch to the spare system SP and Mi, another auxiliary signal path and the main signal path (Dig i tal S
ervice Channel). Then, the supervisory control device AS of the radio station 22 specified from the supervisory control console 10 of the terminal station 21 receives the switching command "1/0" from the control console 10 of the radio station 21 via the auxiliary signal path DSC. To generate the switching command SYS CONT "1/0", and use the active systems M1 to Mn of the wireless station 22 and the standby system.
Controls each power supply panel PS of the SP. In the power supply board PSi of the working system Mi shown in FIG. 3 which has received "1" of the switching instruction SYS CONT to the standby system SP at the radio station 22, the switching instruction SYS
The light emitting diode LED of the display means 2 of the present invention is turned on by CONT "1", and the lighted LED indicates that the active system Mi receiving the switching command "1" is switching to the standby system SP. Is displayed. In the power supply panel PSi,
The logical product (AND) of the above switching instruction SYS CONT "1" and the output signal "1" when the sub-switch SUB SW is turned on is obtained, and the switching oscillator circuit of the power supply board PSi is obtained by the AND output "1".
By turning off (IC), the circuit breaker NFB of the line of the output voltage from the power supply board PSi is operated, and the output voltage -48V from the power supply board PSi to the system Mi is turned off. Then, at the wireless station 22, the switching command SYS CO
In is not possible to AND between an output signal "1" of the sub-switch SUB SW receives "0" of NT other systems M1 -Mn (excluding system Mi), excluding the power supply panel PS ₁ ~PS _n (PSi ) Do not turn off the switching oscillation circuit (IC). Therefore, the terminal
The active system which received the switching instruction SYS CONT "1" to the standby system SP at the radio station 22 specified from the control console 10 of 21
Except for the Mi, that is, the system M ₁ ~ M _n in the working which has received the "0" of SYS CONT, also will not be a line disconnection as a cross-sectional the its power output by a maintenance person is wrong.

[0007]

As described above, according to the present invention, only a specific working system switched to a standby system at a specific relay station or terminal station by a simple switching command from the outside. Turn off the power supply. In addition, an indication that switching is currently being performed is displayed on the active system switched to the standby system. Therefore, it is possible to prevent the maintenance person from erroneously shutting down another active system, thereby improving the reliability of the wireless system.

[Brief description of the drawings]

FIG. 1 is a principle diagram showing a basic configuration of a switching control method in a wireless system of the present invention.

FIG. 2 is a block diagram showing the overall configuration of a switching control method in the wireless system according to the embodiment of the present invention;

FIG. 3 is a block diagram showing a configuration of each power supply panel of an active system and a standby system of each wireless station in the wireless system according to the embodiment of the present invention;

[Explanation of symbols]

1 is a sub-switch , 2 is a display means, 10 is a control console of a centralized monitoring control station or a terminal, and 21, 22, and 23 are cascaded radio stations.

Claims (2)

(57) [Claims] 1. Each cascaded radio station has a plurality of active systems and one standby system, and a designated active system in a designated radio station is designated by a switching command from a control station. In the switching control method in the wireless system that switches to the standby system, a sub switch (SUB SW) is installed on the power supply panel of each system.
When the sub-switch is turned on, the output signal “1” turns on.
Switch the switching command "1" through the AND gate
In addition to the switching oscillation circuit,
Activating the breaker (NFB) by stopping the operation
To the system switched from the power supply panel to the standby.
A switching control method in a wireless system , wherein only power supply is cut off . 2. A radio station designated by a switching command from said control station is provided with display means for displaying that said designated working system has been switched to a standby system. 2. A switching control method in the wireless system according to 1.