JPS6342245A - Centralized control system - Google Patents

Abstract

PURPOSE:To automatically execute switching from a main control station to a subcontrol station by constituting the titled system so that a control station sends out a switching signal to the subcontrol station, when a fault is occurred in a main control station, confirms a fact that a confirming signal from the main control station does not exist, and the subcontrol station starts actually a line control. CONSTITUTION:When a fault is occurred in a main controls station B, first of all, a control station A cannot receive a response signal b1. Therefore, the control station A confirms fact that a response signal b2 from a subcontrol station C can be received, and sends out a switching signal a2' to subcontrol station C. The subcontrol station C receives the switching signal a2', and sends out actually a line control signal c1, only when a confirming isignal from the main control station is not received, and simultaneously, sends out the response signal b2 to the control station A. The subcontrol station C receives in advance line control signals C1, C1', therefore, a reference signal sending-out timing To and line control information can become the same as those of the main control station B. Also, the control station A sends out continuously a switching signal a1' to the main control station B having no response signal.

Description

[Detailed Description of the Invention] [Objective of the Invention] (Field of Industrial Application) This invention provides a system for controlling a main control station that performs line allocation control and one or more slave stations that switch only when a failure occurs in the main control station. This invention relates to a centralized control system that includes a control station.

(Prior Art) When a large number of stations communicate using limited communication lines, it is known that a demand assignment communication method is useful in allocating a communication line each time there is a call request. In particular, the centralized control method, in which a single control station performs line allocation control, not only allows the control station to control the lines all at once, but also eliminates the need for each slave station to manage the lines. It has many advantages such as a simple configuration. However, when there is only one control station, there is a problem in system reliability that if a failure occurs in the control station, the entire system cannot be operated.

” In order to solve the problems mentioned in Section 2 (1'1')
・゛と、にi、? .

A method has been considered in which a plurality of control stations are installed and switching is performed by a small amount of movement. Fundamental (this (7)
Text, Intermediate in the control station! I wish you all the best.
m h'J c! : +t i#II ml /i=j
c! - to Ashi Sei 1, 2, 3) - The control station performs actual line control, and the slave control station (also has line control information)
"・, If there is a failure on the main side a7i3i in line control 4, line 7, the slave control ((-) is a manual switch. However, in the method of In fact, since control stations are switched between control stations, the drawback is that each switch takes time.

(The invention will solve it) 2: Problems to be solved) In the conventional centralized control system, if there is a failure in the control station 1f', the system operation will be interrupted. In order to solve this problem, even with the technique of providing a slave control station, when a failure occurs in the main control station and the line control is performed by switching to the slave control station 1, how long does it take to make the switch? was. The present invention (!) has been made based on one such drawback of the conventional technology, and it does not take much time to switch between the master control station and the slave control station (this automatically happens) (Ill”
,, c! We provide a centralized control system that allows:
Aiming at IJ, 1: Doing 1, [Structure of the invention] (Means to solve the problem) Main control that performs line allocation control) Q5, ': Th main control station (When C failure occurs (this In order to switch the master control station/: slave control station I=, set up one or more slave controls that actually perform line control.
, a new control station is set up... When the control station receives no response signal from the main control station and receives a response signal from the slave control station, the control station receives the response signal from the slave control station. The main control J
→Sends a switching signal to all control stations to inform them that line control will be performed on the actual I'fA.
．． In addition, the main control station always sends a confirmation signal to the slave control station,
The response signal is received from the slave control.

(Function) In the centralized control system ICf, the control station transmits a confirmation signal to inform the master control station and slave control station whether or not to actually perform line control, and sends a response signal to the confirmation signal. One main control station, which receives from each control station, sends the line fee fll signal from each slave station, the confirmation signal from one station, and the responses No. 48 from the side control stations. When the signal is not received, line control is stopped, and during slave control, a switching signal from the control station is received, and a from the main control station is
If the signal cannot be received, line control will begin.

(Example) Below 1, Drawings! (-' indicates), 2', #' Zetsu (Based on this, the details of one embodiment of ``il1'' will be explained.

Figure 1 (;↓, 1 station each: Control station A5 Main control station B
, a slave control station (,'2) and a system consisting of n slave stations (7,').

Control station Ai:j:, main control j・uI], slave control 14 (2
1, which sends the respective confirmation 'F'i @ ``1 * ''*s switching group 'al', aq'.
Main control station J3, slave control interval C is 8t, control 4A, power j
and a response signal 13. ．． 4, which transmits 13f, and the main control station B (main control station B), which performs line control such as allocating and releasing lines for stations 1 to 6. The main control station B (pair j7) sends a line control signal (c') for requesting line allocation and release.

〆1, /2, Mrs' control 1 station I), slave*IJ control station C has conversion 1, 4 tree 1 function 2, 2, 2, 2, slave control interval C sends line control signal during normal operation. il: Yes. However, the line control signal C from the main control station) 3;
a31 = It is assumed that the line control signal C, / from the port is received by 7° f':, the main controller 8B sends a confirmation signal t' and a control signal d/, to the slave control C, and the slave control Interval C sends a response signal dt i41 control % (responsibility 7) to main control station B.
4'・Send L.

The reason why the control bureau was set up completely was as follows.

Sending and receiving signals between the main control station and slave control station automatically (l,
'In the method of cutting through, let's say (, f1 master! tilJ Goten J, ': 1ilJ 1 station 6C11% harm has occurred 7
, too, C1'' Takagawa ill Is there a problem in the j1 main control station from MJ and the signal is not being received?
Yama 1 Kingo wakes up and can easily determine if there is no signal from the main control station.If there is a crack, the main control station or the slave station is down. If this occurs, which side has the C failure occurred?
This is because it is not possible to distinguish between the two.

The frame structure when main control station B performs line control is
Shown in the figure. Here, by performing time division multiplexing, each slave station 1 to n receives a reference signal at time TO, information for station 1 at TO, information for station 2 at To, and information for station N at time To. A line control signal C8 including the line control signal C8 is sent out. Each slave station 1~n
is time T, station 1 sends out information at time Tt, station 2 sends out information at time Tn to main control station B as line control signals C, /. Control station A sends a signal a! to main control station B, which actually performs line control. Send out. This signal a notifies the main control that actually performs line control. Main control station B sends a response signal S to control station A. Further, the control station A sends a signal a to the slave control station C, which does not actually send line control signals. This signal a
, is a signal that commands slave control, and upon receiving this signal, the station stops sending out the line assignment signal. During the slave control station C, the control station C sends the three response signals to the control station A. Furthermore, the master control station B sends a signal d to the slave control station C to confirm which is the master control and which is the slave control station, and sends a signal d to the slave control station C.
sends its response signal d, to main control station B.

In the event that a system failure or a failure such as a rain failure occurs in main control station B, in the conventional method, this failure would be manually switched from the main control station to the slave control station.
A certain amount of time was required for switching. In contrast, in this embodiment, if a failure occurs in the main control station, the control station A will first be unable to receive the response signal S.

Then, the control station A confirms that it can receive the response signal bt from the slave control unit C, and sends the switching signal a, / to the slave control unit C. The slave control interval C is the switching signal a,
/ and a confirmation signal d from the main control station.

It actually starts transmitting the line control signal c, only when the line control signal c is not received. At the same time, a response signal S is sent to the control station Af. Slave control interval C is line control signal CI+C1'
Since the main control station B has received the reference signal transmission timing To and the line control information in advance, the reference signal transmission timing To and the line control information are the same as those of the main control station B. Furthermore, the control station A continues to send the switching signal a1/ to the main control station B which does not receive a response signal.

Main control station B also receives line control signals CI' from each slave station,
Only when the confirmation signal aI from the control station A and the response signal d2 from the slave control station C cannot be received, line control is stopped. As a result, switching from the main control station to the slave control station can be performed automatically, and there are almost no instantaneous interruptions in line control.

Next, if CIc1jli damage occurs between slave controls,
Even though the control station A has received the response signal bi from the master control station B, it receives the response signal b! from the slave control station C! cannot receive. The control station A sends confirmation signals a,
continue to send out.

When a failure occurs in control station A, that is, when confirmation signals al and at are not sent to master control station B and slave control station C, master control station B performs main control using response signal d from slave control station C. By confirming that the slave control unit C is a slave control by the confirmation signal d, even if a failure occurs in the control station, it is possible to accurately distinguish between the main control and the slave control. .

When restarting main control station B where a failure has occurred, main control station B sends a line information transmission request signal dI to slave control station C.
′ is sent. The slave control station C sends line control information to the main control station B using the signal d,/ in response to the signal d,'. The signal dt' is sent because the main control station B can receive the line control signal CI p"1' when the fault is recovered.
, ' are continued until the control data of the master control station B and the slave control station C match. When a match is confirmed, the main control station B sends a control signal d, indicating completion to the slave control station C, and sends a response signal s, to the control station A. When the control station A receives the response signal b1, it sends a switching signal aI'*a2' to the main control station B and the slave control station C, respectively. By receiving the switching signals a, /, the slave control unit C stops line control. Main control station B resumes line control by receiving switching signal a.

In other words, the restart is completed.

When restarting the slave control station C in which a failure has occurred, the slave control station C sends a line information sending signal dt to the main control station B. Main control station B receives signal d.

In contrast, line control information is sent to slave control unit B using signal d. The signal cl is transmitted from the slave 1 control station C (
Valve return, -71 o'clock (r (line control signal (:, , (
:, / becomes possible to receive 1t.
Sending (:, i master control station! 3J and slave control station C and control data match each other).

If the coincidence is confirmed, and the slave control station C becomes larger, the master control station B l
(The control signal d*f indicating completion is sent 141.Jl
: We also send out a response message to the control station AiC, and the re-establishment has been completed by Konruko I-. example (detailed explanation), 7'
;l: However, the present invention is limited to the embodiments of Na above.
Seven variations are possible, and such variations are included in the present invention. For example, even if two or more slave controls are installed, there is no clean connection between them. In that case, the priority when switching between slave controls is required: j:. In addition, the error signal between the main control station and the j-slave station may be included in the line control signal between the main control station and each slave station. There is a degree of freedom in system configuration, and uplink and downlink may be configured separately.

In addition, the present invention applies to all A5 line centralized control systems (V-' applied 7'''6 531 iJi ((
, control qi 2 failure occurred 44E I,, y It was requested that the control station continue sending the confirmation value or switching signal, but the confirmation signal or switching signal was not sent until the response knee signal was received. Both 4th and 7th send out signals, 11-th, J door 1, [Efficacy of the invention,] the present invention (rl, +7.B, main side, 1 station 1r, 1 abatement has occurred. 9A joint control station sends a switching signal to the slave 1fjlJ station, confirms that there is no confirmation signal from the main control station 1-, which can automatically switch from the main control station to the slave control station.

ia (+: Sisteno, without any interruption, can continue, 1, 1, 1, i[da, control station 1, chapter 1)) j of the constant control signal between the stations of the one-do system and the station of the good-time system,
It is possible to check the slave control of the main control at all times.

[Brief explanation of the drawing]

FIG. 1 is a block diagram of an embodiment of the present invention (a block diagram of a cross-sectional system, and FIG. 2 is a frame block diagram.
J * (iK "'Response signal, 'IpCR'...
Line control signal, (1, / , , 1. /,... Control signal, a g', pull H'... switching signal,
.

Claims (1)

[Claims] (1) A main control station that sends and receives line assignment signals for communication between stations, and one or more slave control stations that switch over and perform line control only when a failure occurs in the main control station. and constantly transmits a confirmation signal informing the main control station that it will perform line control and a confirmation signal informing the slave control station to stop transmitting the line assignment signal, and the main control station Also, only when a response signal of the confirmation signal is received from the slave control station, and the response signal from the main control station is not received, and the response signal from the slave control station is received, the slave control comprising a control station that transmits a switching signal to a control station to notify that a station will switch from the main control station to perform line control, and the main control station sends a confirmation signal to the slave control station, The centralized control system is characterized in that the slave control station sends a response signal for the confirmation signal to the main control station.