JPS59201544A - Exchange calling method of portable radio telephone set - Google Patents

Abstract

PURPOSE:To simplify and miniaturize a portable mobile radio set by detecting that a receiving electric field input has operated consecutively for a time at a predetermined level or over, and deciding the detected result as a start and call end signal to an exchange. CONSTITUTION:An antenna 9 of the portable radio telephone set 101 is kept to a position possible for close coupling with a wired waveguide 17 of a radio base station device 102, and the set 101 operates a transmission start section 7, and transmits a radio wave f1 from the antenna 9 from a known circuit. The base station device 102 receives this radio wave at the wired waveguide 17 and inputs it to a demodulation section 13. A receiving electric field detecting section 18 detects that there exists a prescribed value or over of the input of the demodulation section 13, transmits a control signal to an automatic exchange to allow a radio channel during calling to detect and to transmit a call tone. A receiving electric field detecting section 18 of the base station device 102 that the received electric field is intermitted for a prescribed time or over at the end of talking, and a call end signal is transmitted to the exchange.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for controlling calls from a portable radio telephone device to an exchange using two radio frequencies and a tightly coupled mobile radio line.

The method of calling a telephone exchange from a subscriber telephone connected via a communication cable line is usually done by picking up the handset and closing the hook switch to short-circuit the telephone line, and the telephone exchange detects the short-circuit of the telephone line. Detecting a telephone line that is ringing the exchange. However, this short-circuit method cannot be used in wireless telephone devices, so a conventional method has been used in which control signals are transmitted from the wireless telephone device to control the telephone exchange.

A conventional example is shown in FIG. In the figure, (101) is a mobile radio telephone device, (102) is connected to an automatic exchange,
This figure shows a wireless base station device. Mobile radio telephone equipment (101
) includes a control signal transmitter (l) and a dial signal transmitter (2).
), audio input section (3), modulation section (5), multiplication section (6),
Transmission starting section (7), transmitting tank middle part (8), antenna duplexer [
191, antenna (9), reception amplification section (10), demodulation section (
+3+, audio output section (4), signal F wave device 05), response signal receiving section till, signal display section (12).
The radio base station device G02) has antennas (9), (20),
It consists of a modulation section (5), a multiplication section (6), and a transmitting tank middle section (8).

Further, f is the transmission radio frequency from the mobile station radio telephone device (101) and f2 is the transmission radio frequency from the radio base station device (102).

Next, the operation will be explained. Mobile radio telephone equipment (101
), first operate the transmission activation unit (7) of the mobile radio equipment (101) to activate the mobile radio telephone equipment (101) for transmission (this is the control signal transmission unit). (1) to send out a tone signal for starting the automatic switching device.This tone signal is sent to the modulator (5) line (9).
Send from. In the radio base station equipment fit (102), the radio waves received by the antenna (9) are input to the reception amplification ao+ via the antenna common unit 0gl and amplified, demodulated by the demodulation unit a31, and sent to the signal Pe unit 05). The tone signal is extracted and converted into a control signal for the automatic exchange by the control signal converter 161 to start the automatic exchange. When the automatic exchange starts and preparations for receiving the tone signal are completed, the automatic exchange converts the tone signal to the response signal transmitter DO+. Response signal transmitter 1 that transmits a response signal
20+, upon receiving the response signal from the automatic exchange, sends out a tone signal for response to the mobile radio telephone device (101). The response tone signal becomes a modulated signal in the modulator (5), is multiplied to radio frequency f2 in the multiplier (6), amplified in the transmission amplifier (8), and sent to the antenna (via the antenna common unit 191). 9). Mobile radio telephone equipment (101
) receives this on the antenna (9) and sends it to the antenna common area (+9).
It is manually amplified via + to the reception amplification unit Uω, and then sent to the demodulation unit U3.
), the tone signal is taken out by the signal E waver (+5) and input to the response signal receiving section tn). When the response signal receiving section 01) receives this tone signal, the control signal transmitting section 01) sends a transmission stop signal to the control signal transmitting section), and the control signal transmitting section stops transmitting the tone signal from the automatic exchange. The activation is displayed on the signal display section 112+. When the dial signal transmitter (2) is operated after confirming the signal display unit (1), the subscriber selection tone signal is input from the dial signal transmitter (2) to the modulator) 5), and the control signal transmitter The tone signal is sent to the demodulator t131 of the wireless base station device (102) in the same manner as the tone signal is transmitted from the wireless base station device (102). The demodulator (13) demodulates the tire signal and calls the selected subscriber by sending it to the automatic exchange.

At the end of the call, when the control signal transmitter of the mobile radio telephone device (101) is operated, the control signal transmitter (1) transmits a tone signal for recovery. The recovery tone signal is input to the control signal converter mark a of the radio base station device (102) in the same manner as the activation tone signal, and the control signal converter (1G) sends a recovery signal to the automatic exchange.

When the automatic exchange returns to normal operation, the automatic exchange machine sends out an activation signal to the response signal transmitting section (20), and sends out a response tone signal from the response signal transmitting section (20). The response signal is received by the mobile radio telephone device (101) in the same manner as described above.
I(+1) to control the control signal transmitter (11,
The return signal from the control signal transmitter +11 is stopped.

The conventional method is configured as described above.

This method is suitable for cases where significant fluctuations in received field strength are expected, such as in general mobile radio, but the device is complicated and cannot be used while being carried around, such as in portable radio telephones. This method has the drawback of being restricted in the miniaturization of the equipment required for the application.

This invention was made in order to eliminate the above-mentioned drawbacks of the conventional system when using a tightly coupled mobile radio line, and focused on the fact that the received electric field strength of the tightly coupled mobile radio line is extremely stable. , a radio base station receives radio waves transmitted from a mobile radio device, detects that the received electric field input is at a predetermined level or more, and continues for a predetermined period of time; It is determined to be a start signal to the beach, and it also detects when the received electric field input at the wireless base station falls below a predetermined level, or when the received electric field input is interrupted for a predetermined period of time. The object of the present invention is to simplify the device by determining that it is a return signal to the idle device, thereby making it possible to make the portable mobile radio telephone device smaller and more reliable.

An embodiment of the present invention will be described below with reference to FIG. In FIG. 2, the mobile radio telephone device (101) is the same as in FIG.
13. The circuit configuration is the same as that in FIG. 1 except that the signal display section 112+ is removed. Furthermore, the waveguide 07 of the radio base station device (102) is used to transmit and receive radio waves instead of the antenna (9) in Fig. 1, and is closely coupled to the antenna (9) of the mobile radio telephone device (101). Install it in a location where it is possible.

The received electric field detector (j8) detects that when the received electric field strength from the waveguide 0η is small, the input to the demodulator (I3) is the received electric field strength from the waveguide a (which is proportional to the received electric field strength). This is a circuit that detects that the received electric field strength of the antenna (9) is above a certain value by utilizing the well-known property that the input to the demodulator (03) becomes saturated when As shown in Fig. 1, the station equipment (102) is a signal filter (]5
), +ij control signal converter (16), and name/response signal transmitter t20+.

Next, the operation will be explained.

The mobile radio telephone device (101) is held in a position where it can be tightly coupled to the antenna (waveguide a'? of the radio base station device (102)), and the transmission activation section (7) is operated to transmit the signal. The circuit transmits radio waves f from the antenna (9). The radio base station device (102) receives this signal using a waveguide and inputs it to the demodulator t131 using a known circuit.

The received electric field detection section 08) is connected to the demodulation section (13) using a known circuit.
) is detected to be above a certain value and sends a control signal to the automatic exchange. By detecting this signal and the line on which the signal is being sent using a known circuit, the automatic exchange detects the radio line that is calling the exchange, and also receives a selection signal from the mobile radio telephone device (102) to the called subscriber. After preparations are completed, a dial tone is sent to the wireless line via I7 in the same way as for a regular subscriber telephone line. This dial tone is input to the modulation section (5) of the radio base station device (102), and similarly to the response signal in the conventional method described above, it is transmitted to the demodulation section (t) of the mobile radio telephone device (101).
13] and then output as an audible signal from the audio output section (4). On this day, the mobile radio telephone device (101) operates the dial signal transmitter (2) to send out a subscriber selection tone signal similar to that of a normal subscriber telephone. This signal is transmitted to the automatic exchange in the same way as in the conventional system described above, and in the automatic exchange, it is connected to the selected subscriber in the same way as a selection signal from a normal subscriber telephone,
The communication with the mobile radio telephone device (101) is made 6J capable.

When the wireless output from the radio base station device (102) is cut off, the input from the waveguide □□□ is cut off, and the received electric field detection unit (18) detects that the received electric field is cut off for a certain period of time or more. is detected and sends a call end signal to the automatic exchange.

When the automatic exchange receives the call termination signal, it restores the connection of the subscriber's line that made the call.

In the above embodiment, two radio frequencies are used and one mobile radio telephone device is joined to an automatic exchange. By doing so, it is possible to connect a plurality of mobile radio telephone devices at the same time in the same way, and it is also possible to connect the lines of different mobile radio telephone devices using an automatic switch.

As described above, according to the present invention, since the radio waves transmitted by the mobile radio telephone device that makes a call using a tightly coupled mobile radio line are used as the control signal to the automatic exchange, it is possible to control the reversing control in two ways compared to the conventional method. Signal circuits are not required, the device is 1×1, and is inexpensive. In addition, the mobile radio telephone device can be made smaller and more reliable, making it suitable for carrying.

[Brief explanation of drawings]

Figure 1 is a block diagram showing a mobile radio telephone device using a conventional signal transmission method, and Figure 2 (an embodiment of the present invention) shows a mobile radio telephone device using a coupled mobile radio line. In the figure, (101) is a mobile radio telephone device, (102) is a wireless base station device, (1η is a waveguide, and (Ig) is a receiving 4G electric field/direction unit. , In the figures, the same reference numerals indicate the same or corresponding parts. Agent: Masuo Oiwa

Claims (1)

[Claims] (1) A method for calling an exchange from a mobile radio telephone device via a radio base station device in a portable radio telephone device using two radio frequencies and a tightly coupled mobile radio telephone line, the method comprising: The station equipment is provided with a reception electric field detection section that detects the presence or absence of transmission radio waves from the radio telephone device, and the transmission radio waves from the radio telephone device detected by the reception electric field detection section are used as exchange ffrlJ control signals of the exchange.
), a method for calling an exchange for a portable radio telephone device, characterized in that: