JPS6384224A - Master station equipment for time division multi-directional multiplex communication system - Google Patents

Abstract

PURPOSE:To ensure the switching to a standby equipment by utilizing a time slot of a polling channel, giving a supervisory signal in a master station and supervising the signal so as to detect the occurrence of a fault in the master station equipment in its own station equipment. CONSTITUTION:A master station supervisory signal (b) from a supervisory signal generating circuit 10 is subject to time division multiplex to an input signal (a) by a time division multiplex circuit 20 according to a master station supervisory timing signal outputted from a polling control circuit 50 and polling information (c) from the circuit 50 is multiplexed with the signal by a time division multiplex circuit 30. Then the result is processed by a transmission signal processing circuit 40 and is outputted as a transmission signal (d). Moreover, a time division multiplex circuit 60 applies multiplex to the signal (d) with a reception signal (e) sent from each slave station according to the master station supervisory timing signal from the circuit 50 in the master station supervisory signal T multiplexed in the signal (d) and processed by a reception signal processing circuit 70 and the result is outputted as an output signal (f). A supervisory circuit 80 supervises the presence of a fault according to the master station supervisory timing signal from the circuit 50 to detect fault at the occurrence of fault.

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to a master station device for time division multidirectional multiplex communication system,
In particular, the present invention relates to a master station device for a time division multidirectional multiplex communication system capable of detecting a failure within the master station itself.

[Conventional technology]

FIG. 3 is a system configuration diagram of an example of a time division multiplex communication system to which the present invention is applied.

9. The master station continuously sends multiplexed time-division signals in multiple directions to each slave station, and each slave station synchronizes with the signal sent from the master station.9. By reproducing the timing signal, the signal allocated to the own station is extracted.

In addition, each slave station receives time Ta# T, l..., which is assigned to each slave station based on the above timing signal.
The master station transmits signals for T times and controls the master station so that the signals a, b, . . . F in the figure indicates one frame of the signal S, and T, , T, . . . Tn indicate the time allocated to each slave station within one frame. Further, P is a polling channel signal for managing and controlling each slave station from the master station using a polling method, and is commonly used by each slave station. - As an example, the figure shows a case where the master station is polling the slave stations. Further, Tb indicates the allocated time of the polling channel signal P5.

[Problem that the invention seeks to solve]

In the time division multiplex communication system as shown in FIG. 3 described above, all communications are performed via the master station, so a failure in the master station will cause a failure in the entire system.

Therefore, increasing the reliability of the master station device becomes an important issue. One way to solve this problem is to configure the master station device with a working device and a backup device, but in the event of a failure in the working device of the master station, it is possible to effectively switch from the working device to the backup device. Therefore, it is important to reliably detect failures in the master station within the master station itself.

The present invention solves these problems and makes it possible to detect a failure occurring in the master station device in its own device.

[Means for solving problems]

The master station device for time division multiplex communication system according to the present invention has one
It is composed of one master station and a plurality of slave stations, and between the signal trains of the transmission path between the master station and the slave stations, a polling channel is provided for managing and controlling each slave station from the master station using a polling method. In a multi-directional multiplex communication system, there is a monitoring signal generation circuit that generates signals for monitoring within the master station, and N polling channels sent from the master station to the slave stations every M polling period (M and N are positive integers). ) a first time division multiplexing circuit that time division multiplexes the internal monitoring signal outputted from the supervisory signal generation circuit to a certain internal monitoring time slot; and a transmission signal processing circuit that performs transmission signal processing of the transmission signal; and a transmission signal processing circuit that separates and multiplexes the internal monitoring signal in the master station, which is time-division multiplexed on the output signal of the transmission signal processing circuit, into the signal train sent from the slave station. a second time division multiplexing circuit; a reception signal processing circuit that performs reception signal processing on the signal output from the second time division multiplexing circuit; and a monitoring circuit that monitors the internal monitoring signal of the parent station.

〔Example〕

Next, the present invention will be explained with reference to the drawings.

FIG. 1 is a block diagram showing an embodiment of a master station apparatus in the case where the master station apparatus for a time division multiplex communication system according to the present invention is applied to the time division multiplex communication system as shown in FIG. 1st
In the figure, 10 is a supervisory signal generation circuit that generates a signal for internal monitoring in the master station, 20 is a timing signal for internal monitoring in the master station that is output from the polling control circuit 50, and 20 is a supervisory signal generation circuit that generates a signal for internal monitoring in the master station. Accordingly, this is a rapid division multiplexing circuit that time-division multiplexes input signals sent from a master station to a slave station. 30 is a time division multiplexer for time division multiplexing polling information output from the polling control circuit 50 into a signal output from the 1 time division multiplexing circuit 20 in accordance with a polling timing signal also output from the polling control circuit 50. It is a circuit. 40 is a transmission signal processing circuit that performs transmission signal processing such as scrambling on the signal output from the time division multiplexing circuit 30, and the transmission signal output from this transmission signal processing circuit 40 is sent to the slave station.

Reference numeral 60 indicates that the master station monitoring signal, which is time-division multiplexed with the transmission signal output from the transmission signal processing circuit 40, is sent from the slave station in accordance with the master station monitoring timing signal output from the polling control circuit 50. This is a time division multiplexing circuit that separates and multiplexes received signals. 70 is a received signal processing circuit that performs received signal processing such as descrambling on the signal output from the time division multiplexing circuit 60 and outputs an output signal.

A monitoring circuit 80 monitors a master station monitoring signal that is time-division multiplexed with the output signal output from the received signal processing circuit 70 in accordance with a timing signal for monitoring within the master station output from the polling control circuit 50. 50 is a polling control circuit which outputs a monitoring timing signal within the master station to the time division multiplexing circuits 20 and 60 and the monitoring circuit 80, outputs a polling timing signal and polling information to the time division multiplexing circuit 30, and This circuit receives polling information sent from each slave station, which is time-division multiplexed with the output signal output from the received signal processing circuit 7°, and performs management control of each slave station.

FIG. 2 is a time chart showing an example of signals of each part in FIG. 4. In the figure, (a) shows the input signal of the first cause, (b) shows the master monitoring signal T output from the monitoring signal generation circuit 10, and (C) shows the polling signal output from the polling control circuit 50. (d) shows the transmission signal output from the transmission signal processing circuit 40, and this signal is sent to the slave station.

Also, (e) shows the received signals sent from each slave station.

(f) is a received signal (e) in which the master station monitoring signal T is time-division multiplexed with the transmission signal (d) by the time division multiplexing circuit 6o.
The signals are separated and multiplexed into the received signal processing circuit 7o.

This shows an output signal that is output after receiving signal processing.

Further, in FIG. 2, F indicates one frame and PC indicates one polling cycle. Figure 2 shows 1 per polling period.
This is an example of a case where a number of internal monitoring time slots are provided.

As is clear from the explanation of FIGS. 1 and 2 above,
In the master station device shown in FIG.
The time division multiplexing circuit 20 outputs the master station monitoring signal (second figure) outputted from the polling control circuit 50 and inputs the input signal (see figure 2 (a) )), and polling information (FIG. 2 (C)) output from the polling control circuit 5o is multiplexed on this multiplexed signal by the time division multiplexing circuit 30, and the transmission signal processing circuit At step 4o, transmission signal processing such as scrambling is performed and output as a transmission signal (FIG. 2(d)).

Further, in the two-time division multiplexing circuit 60, the transmission signal processing circuit 4
The master station monitoring signal (T in FIG. 2(d)) is time-division multiplexed with the transmission signal output from 0.

According to the internal monitoring timing signal outputted from the polling control circuit 50, the signals are separated and multiplexed into the received signals sent from each slave station (FIG. 2(e)).

The received signal processing circuit 70 performs received signal processing such as descrambling and outputs it as an output signal (FIG. 2(f)), and the monitoring circuit 80 outputs a timing signal for monitoring within the master station from the polling control circuit 50. The presence or absence of failures is monitored according to the following.

For this reason, the supervisory signal generation circuit 101 in the master station device in FIG.
Time division multiplexing circuits 20, 30, 60. Transmission signal processing circuit 40. When a failure occurs in the received signal processing circuit 70,
The master station monitoring signal, which is time-division multiplexed with the output signal output from the received signal processing circuit 70, is not abnormal, and as a result, the monitoring circuit 80 can detect a failure in the master station device.

In the above explanation, the polling channel has 1
We have explained the case where one time slot for monitoring within the parent station is provided for each polling cycle, but the polling channel has N (M and N are positive integers) timeslots for monitoring within the parent station every M polling cycles. It is clear from the above description that the present invention can also be applied to a case where slots are provided.

〔Effect of the invention〕

As explained above, the master station device for the time division multiplex communication system according to the present invention transmits the master station monitoring signal using the time slot of the polling channel, and by monitoring the signal, the master station device It becomes possible to reliably detect failures that occur within the own station equipment, and it becomes possible to reliably switch from the active equipment to the standby equipment in the event of a failure in the active equipment at the master station equipment. . Furthermore, since the internal station is monitored using the time slot of the polling channel, there is no need to provide an extra time slot for monitoring the master station, and therefore, there is an effect that efficient monitoring is possible.

[Brief explanation of the drawing]

FIG. 1 is a configuration diagram of an embodiment of a master station device for time division multiplex communication system according to the present invention, FIG. 2 is a time chart showing an example of signals of each part of FIG. 1, and FIG. 3 is a diagram of the present invention. FIG. 2 is a system configuration diagram showing seven examples of time division multiplex communication systems to which the above is applied. 10: Monitoring signal generation circuit, 20.30: Time division multiplexing circuit, 40: Transmission signal processing circuit, 50: Porting IJ control circuit, 60: Time division multiplexing circuit. 70: Reception signal processing circuit, 80: Monitoring circuit.

Claims (1)

[Claims] 1. Consisting of one master station and a plurality of slave stations, a polling channel for managing and controlling each slave station from the master station by a polling method is included in the signal train of the transmission path between the master station and the slave stations. In the time-division multi-directional multiplex communication system, there is a monitoring signal generation circuit that generates signals for monitoring within the master station, and a polling channel sent from the master station to each slave station.
a first time-division multiplexing circuit that time-division multiplexes internal monitoring signals outputted from the monitoring signal generation circuit to N internal monitoring time slots (M and N are positive integers) for each polling cycle; and a transmission signal processing circuit that performs transmission signal processing of the signal output from the first time division multiplexing circuit.
a second time division multiplexing circuit that separates and multiplexes a master station monitoring signal time division multiplexed on the output signal of the transmission signal processing circuit into a signal train sent from the slave station; a received signal processing circuit that performs received signal processing of the signal output from the time division multiplexing circuit; and a monitoring circuit that monitors the master station monitoring signal that is time division multiplexed on the output signal of the received signal processing circuit. A master station device for a time-division multidirectional multiplex communication system, comprising: