JPS6215939A - System for sending emergency call signal - Google Patents

Abstract

PURPOSE:To obtain an inexpensive emergency call system with high reliability by sending alternately a sound signal output stored in advance and a voice input by a sound collection microphone through timer control at an emergency state so a to inform the emergency state to a base station. CONSTITUTION:When an input signal comes from an emergency operation input terminal 9, a timer control section 11 controls a sound signal sending section 12 in which voice is stored in advance by a timer control section 11 and the stored sound signal is outputted to a control section 5. Further, the state input in a mobile station cabin from a sound collection microphone connection terminal 10 is outputted to the control section 5 after the elapse of a prescribed time depending on the automatic control of the timer control section 11. That is, the sound signal stored in advance and the state in the cabin by the sound collection microphone are outputted alternately to the control section 5, both signals are modulated by a transmitter 3 and sent to a base station from an antenna 1 through an antenna switch section 2.

Description

DETAILED DESCRIPTION OF THE INVENTION (Technical Field) The present invention relates to an improvement of an emergency call method in a mobile station of a wireless communication system.

(Prior art and its problems) FIG. 2 is a block diagram showing an example of an emergency call system in a mobile station of a conventionally used wireless communication system. In the figure, 1 is an antenna, 2 is an antenna switching section, 3 is a transmitter, 4 is a receiver, 5 is a control section, 6 is a reception output connection terminal, 7 is a modulation input connection terminal, 8 is an emergency call signal sending section,
9 is an emergency operation input terminal, and 10 is a sound collection microphone connection terminal.

Next, this operation will be explained. Radio waves from the base station are received in the air 11i11, passed through the antenna switching unit 2, received by the receiver 4, and outputted as a demodulated output to the reception output connection terminal 6 of the control unit 5. on the other hand.

For transmission from the mobile station, audio input from the modulation input connection terminal 7 enters the transmitter 3 from the control section 5 and is modulated.

The signals are transmitted from the liill to the base station as radio waves through the antenna switching unit 2. In addition, in an emergency, the emergency call signal and car number signal etc. from the emergency call signal sending unit 8 are sent to the base station by the signal from the emergency operation input terminal 9, and after a certain period of time, the sound collecting microphone connection terminal 10 The voice input from the antenna is guided through the control section 5 to the transmitter 3, modulated, and transmitted as radio waves from the antenna 1 through the antenna switching section 2 to the base station. However, the conventional system has major drawbacks such as an increase in signal capacity due to an increase in the number of mobile stations and a complicated control circuit, making it uneconomical. Furthermore, on the base station side, there are also disadvantages such as an increase in cost due to an increase in the number of circuits for detecting and displaying emergency call signals, and concerns about ensuring reliability due to the increase in parts.

(Purpose) In order to eliminate these drawbacks, the present invention adds an audio signal generation section and a timer control section in which audio is stored in advance to the mobile station side, and outputs and collects the audio signal stored in advance in an emergency state. The purpose of this system is to automatically and alternately transmit audio input from a sound microphone under timer control to notify the base station of an emergency situation.

(Embodiment) FIG. 1 is a block diagram showing an embodiment according to the present invention.
The same parts as in FIG. 2 are indicated by the same symbols, 11 is a timer control section, and 12 is an audio signal generation section in which audio is stored in advance. Next, this operation will be explained. The radio waves from the base station received by the antenna 1 are demodulated by the receiver 4, are controlled by the control unit 5, and are output as a reception output from the reception output connection terminal 6, and are output from the modulation input connection terminal 7 during normal operation. The operation in which the audio input is demodulated by the transmitter 3 and transmitted as radio waves from the antenna 1 through the antenna switching unit 2 is the same as in the example shown in FIG.

The details of the emergency call signal sending operation according to this embodiment will be explained below. When there is an input signal from the emergency operation input terminal 9, the timer control unit 11 controls the audio signal sending unit 12 in which the preliminary audio is stored, and outputs the stored audio signal to the control unit 5. Also, the timer control section 11
by automatic control.

After a certain period of time has elapsed, the status input inside the mobile station vehicle from the sound collecting microphone connection terminal 10 is output to the control unit 5. In other words, the pre-stored audio signals and the situation inside the vehicle from the sound collecting microphone are output to the control unit 5 alternately, and both signals are modulated by the transmitter 3, passed through the antenna switching unit 2, and sent from the antenna 1 to the base station. Send. I (Effect) As explained above, according to the present invention, it is possible to increase the number of control circuits due to an increase in the number of mobile stations without sending out an emergency call signal, a car number signal, etc. from the mobile station. Since a circuit for detecting and displaying an emergency signal is also unnecessary on the side, an inexpensive and highly reliable emergency call system can be constructed.

[Brief explanation of drawings]

FIG. 1 is a block diagram of an emergency call signal sending system for a mobile station according to an embodiment of the present invention, and FIG. 2 is a block diagram showing an example of a mobile station using a conventional emergency call system. 1: Antenna, 2: Antenna switching section, 3: Transmitter. 4: Receiver, 5: Control unit, 6: Reception output connection terminal. 7: Modulation input connection terminal, 8: Emergency call signal sending section. 6: Emergency operation input terminal, 10: Sound collection microphone connection terminal. 11: Timer control section, 12: Audio signal transmission section in which audio is stored in advance. Figure 1 Figure 2

Claims (1)

[Claims] In a wireless communication system composed of a base station and a mobile station, in an emergency, the mobile station automatically transmits pre-stored voices to the base station under timer control, without relying on an emergency call signal, and moves using a sound-collecting microphone. An emergency call signal transmission method that is characterized by alternately transmitting information about the situation inside the station vehicle to inform of an emergency situation.