JPH05308314A - Control system for origination and termination frequency - Google Patents

Abstract

PURPOSE:To prevent a transmitter receiver for a slave station from being disconnected from a line by outputting a signal for variation control over the origination and termination frequency of the slave station by a master station in response to the alarm signal from the slave station which indicates a drop in solar battery electric power, and controlling the origination and termination frequency by the slave station. CONSTITUTION:An electric power drop detecting circuit 108 outputs an electric power drop detection signal 82 corresponding to the extent of the electric power drop from a battery 110 to an alarm signal generating circuit 109. Then information on the electric power drop of the slave station is sent as a forward radio frequency signal 21 to the master station through a sent signal processing circuit 105 and a radio transmitting circuit 106. The master station sends control information, showing how much the origination and termination frequency of the slave station is controlled, as a downward ratio frequency signal 11 to the slave station. A slave station origination and termination frequency control circuit 107 recognizes how much the origination and termination frequency from the slave station control signal 62 is limited. A control signal 72 corresponding to that is outputted to an interface circuit 104, which variably limits origination and termination frequencies of respective terminals connected to the circuit 104.

Description

Detailed Description of the Invention [Industrial applications]

The present invention relates to a transmitter / receiver for a master station and a transmitter / receiver for a slave station of a wireless communication system composed of one master station and a plurality of slave stations.

[0002]

2. Description of the Related Art A conventional example will be described with reference to FIGS. FIG. 3 is a block diagram showing an example of a transmitter / receiver for a child station of a conventional wireless communication system. As shown in the figure, the transmitter / receiver device for a slave station using the solar panel 111 as its power source temporarily charges the battery 110 with the power generated by the solar panel 111 and further supplies power to each circuit. Communicates with the master station using electric power from the solar battery composed of the battery 110 and the solar panel 111.

Downlink radio frequency signal 1 transmitted from the master station
1 is received by the slave station wireless reception circuit 101, and the first slave station reception signal 1 obtained from the slave station wireless reception circuit 101 is received.
2 is converted into the slave station reception data 32 by the slave station reception signal processing circuit 103. The slave station reception data 32 is transmitted to each terminal via the slave station terminal interface circuit 104. Further, the data transmitted from each terminal is collected by the slave station terminal interface circuit 104 and becomes the slave station transmission data 42. The slave station transmission data 42 is converted into a slave station processing signal 52 by the slave station transmission signal processing circuit 105, and the slave station processing signal 52 is transmitted to the slave station wireless transmission circuit 10.
6, the signal is sent as an upstream radio frequency signal 21 to the master station.

FIG. 4 is a block diagram showing an example of a transmitter / receiver for a master station of a conventional wireless communication system. As shown in the figure, the master station transmitter / receiver receives the uplink radio frequency signal 21 transmitted from the slave station by the master station wireless reception circuit 201, and obtains the master station wireless reception circuit 201 by the master station wireless reception signal 201. The reception signal 13 is converted into reception data 33 for master station by the reception signal processing circuit 203 for master station. The master station reception data 33 is transmitted to each terminal via the master station terminal interface circuit 204. Further, the data transmitted from each terminal is collected by the master station terminal interface circuit 204 and becomes the master station transmission data 43. Transmission data for master station 4
3 is converted into a master station processing signal 53 by the master station transmission signal processing circuit 205, and the master station processing signal 53 is sent to the slave station as the downlink radio frequency signal 11 by the master station wireless transmission circuit 206. Is becoming

[0005]

In the above-mentioned conventional wireless communication system, in the transmitter / receiver for a slave station using a solar battery as a power source, the power source power is excessively reduced due to factors such as weather conditions and line usage conditions. There is. In such a case, if you make and receive calls to and from the slave station indefinitely, the power will be excessively reduced, and you will not be able to operate the transmitter / receiver device for the slave station. There is a problem that a failure such as a system stop that takes a long time to complete maintenance such as replacement occurs. An object of the present invention is to provide an outgoing / incoming call control system which limits the number of incoming / outgoing calls in accordance with a decrease in power of a solar battery and prevents line disconnection or the like due to inoperability of a transmitter / receiver device for a slave station.

[0006]

According to the present invention, a slave station powered by a solar battery has means for detecting a decrease in power of the solar battery and outputting an alarm signal to the master station. Has a means for outputting a signal for variably controlling the number of incoming / outgoing calls of the slave station by this alarm signal,
Further, the slave station is provided with means for controlling the number of incoming and outgoing calls by this control signal.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, the present invention will be described with reference to the drawings. FIG. 1 is a block diagram of an embodiment of a slave station transmitting / receiving apparatus of the present invention. In the figure, the transmitter / receiver for a slave station temporarily charges the battery 110 with the power generated by the solar panel 111, and further supplies power to each circuit. Use to communicate with the master station.

The slave station radio receiving circuit 101 receives the downlink radio frequency signal 11 received from the master station. The control signal detection circuit 102 detects the slave station control signal 62 from the received slave station reception signal 12. Reception signal processing circuit for slave station 1
Reference numeral 03 is a slave station reception signal 2 from the control signal detection circuit 102.
2 is converted into the reception data 32 for the slave station. The slave station terminal interface circuit 104 connects the slave station reception data 32 to each terminal, and the data from each terminal is collected by the slave station terminal interface circuit 104 and becomes the slave station transmission data 42. The slave station outgoing / incoming call number control circuit 107 outputs an outgoing / incoming call control signal 72 corresponding to the slave station control signal 62 to the slave station terminal interface circuit 104.

The slave station transmission signal processing circuit 105 converts the slave station transmission data 42 and the slave station alarm signal 92 sent from the alarm signal generation circuit 109 into a slave station processing signal 52. The slave station wireless transmission circuit 106 processes the slave station processing signal 5
2 is transmitted to the master station as the upstream radio frequency signal 21. When the power generated by the solar panel 11 and the power supplied from the battery 110 falls below a preset reference value, the power source power drop detection circuit 108 outputs a power drop detection signal 82 according to the degree. The alarm signal generation circuit 109 converts the power drop detection signal 82 into a slave station alarm signal 92 for the master station.

FIG. 2 is a block diagram of an embodiment of a transmitter / receiver for a master station according to the present invention. In the figure, the transmitter / receiver for the master station communicates with the slave station using a radio frequency signal.
The master station wireless reception circuit 201 receives the upstream radio frequency signal 21 received from the slave station. Alarm signal detection circuit 20
2 detects a master station alarm signal 63 from the received master station reception signal 13. Reception signal processing circuit 203 for master station
Converts the master station reception signal 23 received by the alarm signal detection circuit 202 into master station reception data 33. The master station terminal interface circuit 204 connects the master station reception data 33 to each terminal, and the data from each terminal is collected by the master station terminal interface circuit 204 and becomes the master station transmission data 43.

The master station transmission signal processing circuit 205 converts the master station transmission data 43 and the control signal 83 sent from the control signal generation circuit 208 into a master station processing signal 53. The master station wireless transmission circuit 206 transmits the master station processed signal 53 as the downlink radio frequency signal 11 to the slave station. The parent station outgoing / incoming call number control circuit 207 variably controls the number of outgoing / incoming calls of the slave station in response to the parent station alarm signal 63, and outputs a parent station control signal 73. The control signal generation circuit 208 controls the master station control signal 73.
Is converted into a control signal 83 for controlling the slave station.

Next, the operation of this embodiment will be described with reference to FIGS. In the slave station of FIG. 1, when the power supplied from the battery 110 falls below a preset reference value, the power supply power drop detection circuit 108 outputs a power drop detection signal 82 corresponding to the degree to the alarm signal generation circuit. It outputs to 109. The alarm signal generation circuit 109 outputs the slave station alarm signal 92 corresponding to the power drop detection signal 82 to the slave station transmission signal processing circuit 105. Then, the information about the decrease in the power supply of the slave station is transmitted through the slave station transmission signal processing circuit 105 and the slave station wireless transmission circuit 106,
It is transmitted to the master station as the upstream radio frequency signal 21.

In the master station of FIG. 2, the information about the decrease in the power supply of the slave station is detected by the alarm signal detection circuit 202 and output as the master station alarm signal 63. The master station outgoing / incoming number control circuit 207 determines from the master station alarm signal 63 how much to limit the outgoing / incoming number of the slave station, and outputs the master station control signal 73. The control signal generation circuit 208 converts the master station control signal 73 into a control signal 83 for controlling the slave station. The control information of the number of outgoing / incoming calls to the slave station is transmitted to the master station transmission signal processing circuit 205 and the master station wireless transmission circuit 206.
And is transmitted to the child station as the downlink radio frequency signal 11.

In the slave station of FIG. 1, control information on the number of incoming and outgoing calls is detected by the control signal detection circuit 102 and output as a slave station control signal 62. Control circuit 107 for outgoing / incoming calls
Recognizes from the slave station control signal 62 to what extent the number of outgoing / incoming calls is limited, and outputs an outgoing / incoming call control signal 72 corresponding thereto to the slave station terminal interface circuit 104.
The slave station terminal interface circuit 104 receives the outgoing / incoming call control signal 72, and in response to this signal, the number of outgoing / incoming calls to each terminal connected to the slave station terminal interface circuit 104 can be variably limited.

[0015]

As described above, according to the present invention, the power supply state of the battery of the slave station is monitored by using the power supply power drop detection circuit and the alarm signal generation circuit, and this information is transmitted to the master station to transmit the information to the master station. By controlling the master station's outgoing / incoming call number control circuit and control signal generation circuit, the number of outgoing / incoming calls to each terminal connected to the slave station can be variably limited, resulting in an excessive decrease in the power supplied from the battery. It is possible to prevent troubles such as line disconnection and system stoppage due to, and long-term system stoppage until maintenance completion such as battery replacement, and the power supply status of the slave station at the master station. By being able to grasp the information, it is possible to improve the efficiency in terms of maintenance management.

[Brief description of drawings]

FIG. 1 is a block diagram of an embodiment of a slave station transmitting / receiving apparatus of the present invention.

FIG. 2 is a block diagram of an embodiment of a master station transmitting / receiving apparatus of the present invention.

FIG. 3 is a block diagram of an example of a conventional transceiver for a slave station.

FIG. 4 is a block diagram of an example of a conventional master station transmitting / receiving apparatus.

[Explanation of symbols]

 101 wireless reception circuit for slave station 102 control signal detection circuit 103 received signal processing circuit for slave station 104 terminal terminal interface circuit for slave station 105 transmission signal processing circuit for slave station 106 wireless transmission circuit for slave station 107 slave station outgoing / incoming number control Circuit 108 Power supply power drop detection circuit 109 Alarm signal generation circuit 110 Battery 111 Solar panel 201 Master station radio reception circuit 202 Alarm signal detection circuit 203 Master station reception signal processing circuit 204 Master station terminal interface circuit 205 Master station transmission signal Processing circuit 206 Master station wireless transmission circuit 207 Master station outgoing / incoming call number control circuit 208 Control signal generation circuit

Claims (1)

[Claims] 1. A wireless communication system comprising a master station and a slave station powered by a solar battery, wherein the slave station detects a decrease in power of the solar battery and outputs an alarm signal to the master station. And a means for outputting to the master station a signal for variably controlling the number of outgoing / incoming calls of the slave station by the alarm signal, and further for the slave station, the control signal An incoming / outgoing number control system comprising means for controlling the number of incoming / outgoing calls.