JPS63132540A - Master station equipment for time division multi-directional multiplex communication system - Google Patents

Abstract

PURPOSE:To exactly detect a fault generated in a master station equipment, in the own station equipment, by allowing an in-master station monitoring signal to flow by utilizing a time slot of a polling channel, and monitoring its signal. CONSTITUTION:An in-master station supervisory signal which has been brought to time division multiplexing is fetched in accordance with an in-master station monitoring timing signal outputted from a polling controlling circuit 120, in a gate circuit 70, and sent to a time division multiplexing circuit 80. In the time division multiplexing circuit 80, said signal is brought to time division multiplexing to a receiving carrier wave signal received from each slave station, in accordance with the in-master station monitoring sory timing signal outputted from the polling controlling circuit 120, and demodulated by a demodulation circuit 90. When a fault is generated in each circuit of 10-100 in a master station equipment, the in-master station monitoring signal which has been brought to time division multiplexing to an output signal outputted from a receiving signal processing circuit 100 becomes abnormal, and as a result, the fault of the master station equipment can be detected by a monitoring circuit 110.

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,
! ! ! The present invention relates to a master station device for a time division multi-directional multiplex communication system capable of detecting a failure within the master station within 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.

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 and regenerates the timing signal. , extracts the signal allocated to its own station.

Further, each slave station has a time TB t Tb#... assigned to each slave station based on the above timing signal.

The master station transmits signals for Tn, and controls the master station so that the signals a, b, . Indicates one frame of FFi signal S in the figure * Ta4 Tb # ""mT
n indicates the time allocated to each slave station within one frame. Further, in the figure, Pb is a signal of a polling channel for managing and controlling each slave station from the master station using a polling method, and is commonly used for each slave station. - As an example, the figure shows a case where the master station is polling the slave station b'. Further, e Tb indicates the total time allocated to the polling channel signal Pb.

[Problem to be solved by the invention] 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 affects the entire system. becomes an obstacle.

Therefore, increasing the reliability of the R 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.

[Steps to solve 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 the 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 each slave station every M polling period (M and N are positive numbers). an integer) a first time division multiplexing circuit that time-division multiplexes the internal monitoring signal outputted from the monitoring signal generation circuit to a certain internal monitoring time slot; a modulation circuit that inputs a signal and outputs a transmission carrier signal;
Transmit carrier signal.

a frequency converting circuit that converts the frequency of the receiver received from each of the slave stations into a frequency of a carrier signal; and a dart circuit that extracts the internal monitoring signal from the transmitted carrier signal whose frequency has been converted by the frequency converting circuit.

a second time division multiplexing circuit for time division multiplexing the intra-master station monitoring signal extracted by the dart circuit onto the received carrier wave signal received from each of the slave stations;

It is configured to include a demodulation circuit that demodulates the signal output from the time division multiplexing circuit, and a monitoring circuit that monitors the internal monitoring signal in the parent station that is time division multiplexed with the signal output from the demodulation circuit.

〔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 120, and 20 is a supervisory signal generation circuit that generates a signal for internal monitoring in the master station. Accordingly, this is a time division multiplexing circuit that time division multiplexes input signals sent from a master station to each slave station. 30 is a polling control circuit 120
Polling information output from.

Also output from the pooling control circuit 120? - 2 time division multiplexing circuit 20 according to the ring timing signal;
This is a time-division multiplexing circuit that time-division multiplexes signals output from the multiplexer. 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 50 is a modulation circuit that inputs the signal output from the transmission signal processing circuit 40 and outputs a transmission carrier signal. Then, the transmission carrier signal output from this modulation circuit 50 is sent to each slave station.

60 is a frequency conversion circuit that converts all the frequencies of the transmission carrier signal output from the modulation circuit 50 into the frequency of the reception carrier signal received from the slave station; According to the timing signal for monitoring within the master station that is output from the control circuit 120.

This is a dirt circuit that extracts only the internal monitoring signal time-division multiplexed in the time-division multiplexing circuit 20.

80 is a time division multiplexer for time division multiplexing the internal monitoring signal taken out by the dart circuit 70 onto the received carrier wave signal received from each slave station according to the internal monitoring timing signal output from the polling control circuit 120. It is a circuit. 90 is a demodulation circuit that demodulates the signal output from the time division multiplexing circuit 80;

100 is a received signal processing circuit that performs received signal processing such as descrambling on the signal output from the demodulation circuit 90 and outputs an output signal.

110 is a received signal processing circuit 1 according to a timing number for monitoring within the master station outputted from a polling control circuit 120.
This is a monitoring circuit that monitors the internal monitoring signal in the parent station that is time-division multiplexed with the output signal output from 00. 120 is a polling control circuit.

A timing signal for monitoring within the parent station is output to the time division multiplexing circuits 20 and 80, a Y-to circuit 70, and a monitoring circuit 110, a timing signal for polling and polling information are output to the time division multiplexing circuit 30, and Received signal processing circuit 10
This circuit receives pooling information sent from each slave station that is time-division multiplexed into the output signal output from 0, and manages and controls each slave station.

FIG. 2 is a time chart showing an example of signals of each part shown in FIG. In the same figure, (a) is the input signal ' of Fig. 1.
t e (b) is the internal monitoring signal T ffi outputted from the monitoring signal generation circuit 10, and (e) is the polling information '! outputted from the polling control circuit 120. r,
(d) is a signal in which the parent station monitoring signal T (b) and polling information (C) which are multiple outputted from the time division multiplexing circuit 30 are time division multiplexed on the input signal (a), and (e) is a modulated signal. A transmit carrier signal output from circuit 50 is shown, and this transmit carrier signal is sent to each slave station.

(f) shows the master station monitoring signal T extracted from the transmission carrier signal frequency-converted by the frequency conversion circuit 60 in the f-to circuit 70. In addition, (X) represents the received carrier signal received from each slave station, and (h) represents the time division multiplexing circuit 80.
In , (i) is multiple outputted from the received signal processing circuit 100, a signal obtained by time-division multiplexing the master station monitor signal T(f) extracted by the ff-) circuit 70 and the received carrier wave signal 0). Shows the output signal.

Further, in FIG. 2, TDl and TD2 indicate delay times, F indicates one frame tt, and pc indicates one polling period. FIG. 2 shows an example in which one time slot for monitoring within the master station is provided for every 14-ring period.

As is clear from the above explanation of FIGS. 1 and 2, in the master station device shown in FIG. In the division multiplexing circuit 20, the input signal (FIG. 2(a)) is time-division multiplexed according to the timing signal for monitoring within the master station which is multiple outputted from the polling control circuit 120, and this multiplexed signal is The multiplexing circuit 30 outputs multiple polling information from the polling control circuit 120 (see FIG. 2(C)).
) are time-division multiplexed (FIG. 2(d)), and a transmission signal processing circuit 40 performs transmission signal processing such as scrambling.

The modulation circuit 50 outputs the transmit carrier signal (FIG. 2(e)), and the two-frequency conversion circuit 60 converts it into the frequency of the receive carrier signal (FIG. 2-) received from each slave station.

Furthermore, the master station monitoring signal (T in FIG. 2(e)), which is time-division multiplexed on the two-frequency-converted transmission carrier signal (on the time chart (same as in FIG. 2(,)), is sent to the gate circuit 70.
At the time, the signal is taken out in accordance with the internal monitoring timing signal outputted from the polling control circuit 120 and sent to the two-time division multiplexing circuit 80 (FIG. 2(f)). In the time division multiplexing circuit 80, the received carrier wave signal (FIG. 2 (g)) received from each slave station is time division multiplexed ( (Fig. 2 (h)) # It is demodulated by the demodulation circuit 90, the received signal processing such as descrambling is performed in the received signal processing circuit 100, and it is output as an output signal (Fig. 2 (i)). The monitoring signal within the master station (T in FIG. 2(i)) which is time-division multiplexed in FIG.
0, the presence or absence of a failure is monitored by monitoring according to the internal monitoring timing signal output from the polling control circuit 120.

Therefore, when a failure occurs in each of the circuits 10 to 100 in the master station device in FIG. 1, the master station monitoring signal ( If T) in FIG. 2(i) is abnormal, the monitoring circuit 110 can detect a failure in the master station device.

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

〔Effect of the invention〕

As explained above, the master station device for time-division multiplex communication system according to the present invention transmits the monitoring signal within the master station using the time slot of the polling channel, and by monitoring the signal, It is possible to reliably detect a fault that has occurred within the own station device, and it becomes possible to reliably switch from the active device to the standby device when the active device in the master station device fails. 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. 1 is a system configuration diagram illustrating an example of a time division multiplex communication system to which the above is applied. 10: Monitoring signal generation circuit, 20, 30: Time division multiplexing circuit, 40: Transmission signal processing circuit, 50: Modulation circuit,
60: Frequency conversion circuit, 70: Dart circuit, 80: Time division multiplexing circuit, 90: Demodulation circuit. 100: Reception signal processing circuit, 110: Monitoring circuit. 120: Polling control circuit.

Claims (1)

[Claims] 1. Consisting of one master station and a plurality of slave stations, the signal train of the transmission path between the master station and the slave stations includes a polling channel for managing and controlling each slave station from the master station using a polling method. In the time-division multidirectional multiplex communication system, a monitoring signal generation circuit that generates a signal for monitoring within the master station, and N polling channels sent from the master station to each slave station every M polling period (M and N is a positive integer) A first time division multiplexing circuit that time-division multiplexes the internal monitoring signal outputted from the monitoring signal generation circuit to a certain internal monitoring time slot; a modulation circuit that inputs a multiplexed signal and outputs a transmission carrier signal; a frequency conversion circuit that converts the frequency of the transmission carrier signal to the frequency of a reception carrier signal received from each slave station; and the frequency conversion circuit. a gate circuit that extracts the master station monitoring signal from the frequency-converted transmission carrier signal;
a second time division multiplexing circuit that time division multiplexes the internal monitoring signal extracted by the gate circuit onto the received carrier signal received from each of the slave stations; for a time-division multidirectional multiplex communication system, comprising: a demodulation circuit that demodulates a signal output from the demodulation circuit; and a monitoring circuit that monitors a master station monitoring signal that is time-division multiplexed with the signal output from the demodulation circuit. Master station device.