JPH05219565A - Transmitter/receiver for radio communication system - Google Patents

Abstract

PURPOSE:To prevent a line from being disconnected by rapidly lowering supplied power by suppressing consumed energy by limiting the number of originated/ terminated calls at a terminal I/F circuit by a control circuit when a slave station executing communication with a master station detects the power reduction of a solar battery power source at the transmitter/receiver of the own station. CONSTITUTION:The transmitter/receiver for slave station executes communication with the master station by charging the generated power of a solar panel 108 to a battery 109 and supplying the power to respective circuits. Further, when the supplied power of the battery 109 gets lower than a reference value set in advance, a power supply reduction detecting circuit 106 outputs a power reduction detecting signal 71 corresponding to the degree. A transmission/ reception control circuit 107 outputs a transmission/reception control signal 81 corresponding to the signal 71 to a terminal I/F circuit 103 and when the circuit 103 receives the signal 81, the number of calls originated/terminated to respective connected terminals is variably limited. Thus, energy consumption is suppressed, and line disconnection or system stop caused by the rapid reduction of supplied power can be prevented.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wireless communication system composed of a master station and a slave station, and more particularly to a transmitter / receiver device for the slave station using a solar battery.

[0002]

2. Description of the Related Art FIG. 2 is a block diagram showing an example of a transmitting / receiving apparatus of a slave station in a conventional wireless communication system. As shown in the figure, the slave station transmitter / receiver that uses a solar panel as a power source temporarily charges the battery 109 with the power generated by the solar panel 108 and supplies the power to each circuit. The slave station uses the power from the battery 109 to communicate with the master station. That is, the reception radio frequency signal 11 transmitted from the master station is received by the radio reception circuit 101, and the reception signal 21 obtained by the radio reception circuit 101 is received.
Is converted into reception data 31 by the reception signal processing circuit 102. The received data 31 is transmitted to each terminal via the terminal interface circuit 103. Further, the data transmitted from each terminal is collected by the terminal interface circuit 103 and becomes the transmission data 41. Transmission data 41
Is converted into a processed signal 51 by the transmission signal processing circuit 104, and the processed signal 51 is sent to the master station as the transmission radio frequency signal 61 by the radio transmission circuit 105.

[0003]

In the above-mentioned conventional transmitter / receiver device for a slave station which uses a solar battery as a power source, the power supplied from the battery 109 sharply decreases due to factors such as weather conditions and line usage conditions. It may not be possible to operate the transmitter / receiver of the station, resulting in a failure such as line disconnection or system stoppage. In addition, there is a problem that a system is stopped and other trouble occurs until maintenance such as battery replacement performed when the power supply is reduced is completed. An object of the present invention is to provide a transmission / reception device that prevents a system stoppage due to a decrease in power of a solar battery.

[0004]

According to the present invention, a power source power drop detecting circuit for detecting a power drop of a solar battery and a power source power drop detecting circuit are sent to a transmitter / receiver device of a slave station powered by a solar battery. A signal is sent and received to control the number of incoming and outgoing calls of the slave station. For example, the slave station has a terminal interface circuit that controls transmission / reception between the master station and the terminal, and a power supply power drop detection circuit detects a drop in the power supply of the solar battery and issues a signal based on this detection signal. The incoming control circuit outputs a control signal,
The terminal interface circuit is configured to limit the number of transmissions and receptions based on this control signal.

[0005]

[Operation] When the power supply of the solar battery is reduced, the number of incoming / outgoing calls of the slave station is limited, so that the power consumption of the slave station is suppressed to prevent a rapid reduction of the supply power, and the communication line is short-term. Avoid breaks in between.

[0006]

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 slave station transmitter / receiver temporarily charges the battery 109 with electric power generated by the solar panel 108, supplies electric power to each circuit, and uses the electric power from the battery 109 to communicate with the master station. I do. The radio reception circuit 101 receives the reception radio frequency signal 11 received from the master station, and the reception signal processing circuit 102 converts the reception signal 21 into reception data 31. The terminal interface circuit 103 sends the received data 31 to each terminal. Further, the terminal interface circuit 103 collects data from each terminal and uses it as the transmission data 41. The transmission signal processing circuit 104 converts the transmission data 41 into a processing signal 51, and the wireless transmission circuit 105 transmits the processing signal 51 as a transmission radio frequency signal 61 to the master station.

Further, when the power supplied from the battery 109 falls below a preset reference value, the power supply power drop detection circuit 106 outputs a power drop detection signal 71 according to the degree. The outgoing / incoming call control circuit 107 outputs an incoming / outgoing call control signal 81 corresponding to the power drop detection signal 71 to the terminal interface circuit 103.

With this configuration, when the power supplied from the battery 109 falls below a preset reference value, the power supply power drop detection circuit 106 sends and receives a power drop detection signal 71 according to the degree. Output to the control circuit 107. The outgoing / incoming call control circuit 107 outputs an incoming / outgoing call control signal 81 corresponding to the power drop detection signal 71 to the terminal interface circuit 103. When the terminal interface circuit 103 receives the incoming / outgoing call control signal 81,
The number of incoming and outgoing calls to each connected terminal is variably limited.

Therefore, when the power supplied from the battery 109 is reduced, the number of incoming and outgoing calls is limited to prevent an excessive decrease, and the line currently being communicated is interrupted or the system is stopped. To avoid. Further, the power consumption of the transmission / reception operation in the slave station is suppressed, and the connection is secured even when the number of lines is reduced until the battery replacement or the like is completed, and the line is completely disconnected.

[0010]

As described above, according to the present invention, a transmitter / receiver device using a solar battery is provided with a power source power drop detection circuit for detecting a drop in the power supply of the battery, and the number of incoming / outgoing calls of slave stations based on the detection result. Since it has an outgoing / incoming call control circuit that outputs a signal to limit the number of incoming / outgoing calls, it variably limits the number of incoming / outgoing calls when the power supply to the battery is reduced, which causes a line disconnection or system failure due to a sudden drop in the supplied power. It is possible to obtain the effect that it is possible to avoid the stop of the system and the like, and also to avoid the failure such as the system stop for a long time required for the completion of the maintenance such as the battery replacement.

[Brief description of drawings]

FIG. 1 is a block diagram of an embodiment of a transmission / reception device of the present invention.

FIG. 2 is a block diagram of an example of a conventional transmission / reception device.

[Explanation of symbols]

 101 wireless reception circuit 103 terminal interface circuit 105 wireless transmission circuit 108 solar panel 109 battery

Claims (2)

[Claims] 1. A power supply drop detection circuit for detecting a drop in power of the solar battery in a transmitter / receiver of a slave station using a solar battery as a power supply in a wireless communication system composed of a master station and a slave station, and a power supply for the same. A transmission / reception apparatus for a wireless communication system, comprising: a transmission / reception control circuit for controlling the number of transmissions / receptions of a slave station according to a signal transmitted from a power drop detection circuit. 2. A terminal interface circuit for controlling transmission / reception between a master station and a terminal, wherein a power supply power drop detection circuit detects a drop in power supply of a solar battery, and call origination / reception control based on this detection signal. The circuit outputs the control signal,
The transmitting / receiving apparatus of the wireless communication system according to claim 1, wherein the terminal interface circuit is configured to limit the number of transmissions / receptions based on the control signal.