JPS60196022A - Radio telephone set - Google Patents

Abstract

PURPOSE:To attain the talking through telephones by transmitting a call signal with a radio telephone device which the states of slave devices can be monitored by a master device only in case the slave devices are set in the waiting state when the master device receives the call signal. CONSTITUTION:The carrier signal transmitted through an antenna 23 of a master device 1 is supplied to a reception circuit 25 through an antenna 24 of the 1st salve device. The carrier signal received by the circuit 25 is partially detected by a carrier wave detecting circuit 23 to actuate temporarily a transmission circuit 29 in case the 1st slave device is set under a waiting state. Then the carrier signal is transmitted through an antenna 34 and received by a reception circuit 22. Then the carrier signal is applied to a control circuit 3 via the 1st detection circuit 7 to discriminate that the 1st slave device is kept in the waiting state. Then a call signal control part is controlled and a call signal oscillator 10 is oscillator to supply a call signal to the circuit 29. Then said carrier signal is modulated and transmitted through the antenna 23.

Description

DETAILED DESCRIPTION OF THE INVENTION (A) Field of Industrial Application The present invention relates to a radio telephone that allows a base unit to monitor the status of a slave unit.

(b) Prior art Wireless telephones that enable telephone communication by communicating wirelessly with a base unit connected to a telephone line and the base unit are, for example,
It is described in Publication No. 7649.

When a plurality of handsets are provided in such a radio telephone, the transmitting frequency and receiving frequency are made to be different between each handset so that signals can be exchanged with the selected handset. When a base unit receives a call signal from a telephone line in a stick device, it needs to check which handset is on standby and send the call signal to that handset. If the calling signal is sent to a handset whose power is turned off, and the calling signal is not noticed and continues to be sent, the call will never be able to be made.

(／→ Purpose of the Invention The present invention provides a wireless telephone in which, when a base unit receives a call signal, the call signal is transmitted only when it is confirmed that the slave unit is in a standby state so that a telephone conversation can be made. This is what we provide.

B) Structure of the Invention The present invention modulates a carrier wave signal having a frequency that matches the receiving frequency of each slave unit with an identification signal unique to each slave unit in a transmission circuit of a base unit, or transmits it without modulating it, When the handset is in the receiving state, operate the transmitting circuit of the handset with the carrier wave signal or identification number 4 received by the receiving circuit,
A wireless telephone characterized in that a carrier wave signal of a predetermined frequency is transmitted from the transmission circuit to the handset, either as is or modulated with an identification signal, and received by the receiving circuit of the base unit to confirm that the handset is in a standby state. Regarding.

(e) Examples The following describes the wireless telephone of the present invention according to the drawings.
The sword is a base unit connected to a telephone line (2), which is controlled by a control circuit (3) that generates various signals by being controlled by signals applied to it, and a PLL (41) which is controlled by code signals from the control circuit (3). The receiving circuit (5) in which the receiving frequency is determined, the same P L L (
a transmitting circuit (6) in which the frequency of the carrier signal is determined by (71 (8));
), an identification signal oscillator (9) that is operated by a signal from the control circuit (3) and generates an identification signal, a calling signal oscillator (QO) that is also operated by a signal from the control circuit (3) and generates a calling signal, and a telephone line. (2) Calling signal detection circuit α that detects the calling signal transmitted from
It has a relay uh that connects the v1 hybrid transformer a2 and the telephone line (2). In addition, the control circuit (
3) is shown in FIG. 4 (the central processing unit is formed by a microconductor and processes each supplied signal and outputs the necessary signals, the central processing unit) Q.
A ROM (
15), a RAM QG) which records and outputs the signal from the central processing unit α as needed, and a 4-bit code signal 1 which controls the PLL (41) based on the signal from the central processing unit α→. )+ , D2 , Ds
, D4, a recognition signal control unit 0en for generating the recognition signal, a call control unit a→ for controlling the call signal, and the relay (131).
and a relay signal generating section that generates a relay signal that excites the. (2+) is a keyboard.

Figure 2 is a block diagram of one of the many handsets with different transmitting and receiving frequencies.
a receiving circuit Qω connected to the receiving circuit Qω, an amplifier circuit (20) for amplifying the audio signal from the receiving circuit (25), and a microphone (
27) an amplifier circuit (c) for amplifying the audio signal from the amplifier circuit; a transmitting circuit (2) for transmitting the audio signal amplified in the amplifier circuit;
9) A PLL (program divider of 3υ and a control circuit 0 that determines the division ratio) that is controlled by a keyboard (2)) etc. and sets the reception frequency or transmission frequency of the reception circuits (two and the transmission circuit), and and a carrier detection circuit (c).

Next, the operation of the wireless telephone according to the present invention will be explained. When a calling signal is received by the base unit (1) via the telephone line (2), it is detected by the calling signal detection circuit 0υ and supplied to the control circuit (3). Then the control circuit (3
) operates and generates a code signal from DATAaη. Code signal signals 1, Dl, and D4 are determined by the transmitting frequency and receiving frequency of the transmitting circuit (5) and receiving circuit (6) as shown in FIG. The tail signal is set to match the receiving and transmitting frequencies of the machine.
, ,D, ,D4 is o, o.

0.1, the division ratio of the program divider 41 is set accordingly, the frequency of the carrier signal of the transmitting circuit (6) is matched with the receiving frequency of the first slave unit, and The reception frequency of (5) is tuned to the frequency of the carrier signal of the first slave unit.Therefore, the reception frequency of the base unit (1)
The carrier wave signal transmitted from the antenna (C) is supplied to the receiving circuit (C) from the antenna (24) of the first child device.

By the way, the handset is not scheduled to be used at all (unused state where all power supplies are turned off, and standby state where only the receiving circuit (c) is in operation and the transmitting circuit (to) is inactive). There is a call state in which both the receiving circuit (c) and the transmitting circuit are operated.When the first handset is in the standby state, when the receiving circuit (c) receives a carrier wave signal, a portion of the carrier wave signal is is detected by the carrier detection circuit (c), the transmission circuit is temporarily activated, and the carrier signal is transmitted from the antenna.The carrier signal is received by the receiving circuit (2) of the base unit, and the transmitting circuit is temporarily activated. The control circuit (3) passes through the detection circuit (7).
), and identifies that the first slave device is in a standby state. Then, the paging signal controller α field is controlled to cause the paging signal oscillator a to oscillate and supply it to the transmitting circuit fiK to modulate the carrier signal and transmit it from the antenna (c). The carrier wave signal modulated by the calling signal is transmitted to the receiving circuit of the first handset (
c), and the paging signal is demodulated. The calling signal is amplified by the amplifier circuit (E) and then drives the speaker (G), so that the owner of the first handset can know that there is an incoming call. Then, when the owner operates the keyboard (1) to put the transmitting circuit (3) into an operating state, etc., and puts it into a talking state, an activation signal is generated.

The activation signal is applied to the transmitting circuit (2), modulates the carrier signal, and is transmitted from the antenna diagram. The receiving circuit (5) of the base unit (1) demodulates the calling signal, passes through the control circuit (3) and adds it to the relay α, which energizes the 0th relay and closes the telephone line (2) to enter the talking state. Make it.

Therefore, the voice signal from the other party is applied from the telephone circuit (2) to the transmitting circuit (6) via the relay (131) and the hybrid transformer, where the carrier wave signal is modulated and transmitted.

The carrier wave signal enters the receiving circuit (c) from the antenna Ca of the first handset, where it is demodulated into an audio signal and sent to the amplifier circuit (c).
After being amplified by 20, the speaker C3S sounds. -When the owner of the male device speaks into the microphone □□□,
The voice is converted into an audio signal by a microphone (C), amplified by an amplifier circuit (C), and then input to a transmission circuit, where it is modulated into a carrier wave signal and transmitted. In the base unit (1), the receiving circuit (c) demodulates and detects the voice signal in the same manner as described above, and the voice signal is supplied to the telephone line via the hybrid transformer α2 and the relay α3 and transmitted to the other party, allowing a telephone conversation to be performed.

When the first slave unit is not in use, there is no response from the first slave unit, and when this is detected in the base unit, the D
Code signal of ATA part αη, , D, , D3, D4
is set to 0, 0.1.0, this time it becomes possible to communicate with the second slave unit, and it is checked whether the second slave unit is in the standby state in the same way as described above.

In the above, we checked whether the status of the slave unit is in the standby state using the carrier wave signal, but the response may be from a slave unit controlled by a base unit other than this base unit, and there is a risk of misidentification. Figure 3 shows how the identification signal determined for each machine is sent from inside for confirmation.
In order to communicate with the first slave unit, a code signal set to 010.0,1 is generated, and the first slave unit is identified from the identification signal oscillator (9) using the signal from the identification signal control unit (a). A specified identification signal is generated. The transmission circuit (6) matches the frequency of the carrier signal with the receiving frequency of the first handset by the code signal, modulates it with the identification signal, and transmits it from the antenna (c).

The receiving circuit (c) of the first handset demodulates the identification signal from the received carrier signal and applies it to the control circuit 13 via the identification signal detection circuit. Then, the control circuit 02 operates and puts the transmitting circuit (to) into an operating state, generates a confirmation signal from the code signal oscillator G7), modulates the carrier wave signal in addition to the transmitting circuit, and transmits the signal. Then, the receiving circuit in the base unit (
In 5), the carrier wave signal is demodulated, the confirmation signal generated by the first slave unit is detected, and the confirmation signal is sent to the control circuit (3) through the second detection circuit (8), and the first slave unit is in a standby state. and call signal controller α in the same way as described above.
9 to oscillate the calling signal oscillator (10) to generate the first
Send it to the handset to start a phone call.

When the first handset is in an inoperable state or the identification signal is not a specified one, the first handset does not respond, so the main handset (1) changes the code signal and sends the second and third handset.
...Sequentially searches for slave units and finds a slave unit that is in standby mode.

In the above, it is also possible to call the other party from the handset and have a telephone conversation. To do so, operate the keyboard (to) to enter a talking state, and oscillate the code signal oscillator 07) to generate a dial signal. The dial signal modulates a carrier wave signal in the transmitting circuit 01 and is transmitted to the base unit. Then, the base unit (in the case of Katana, the relay (131) is energized by the activation signal generated when the call state is set, and the dial signal is sent to the receiving circuit (
After demodulating with 5), high print transformer α4, relay (1
3) and is added to the telephone line (2) and transmitted to the other party. Therefore, when the other party hears the dial tone and picks up the receiver, the telephone line (2) is closed and the telephone conversation becomes possible.

(F) Effects of the Invention As described above, the wireless telephone of the present invention transmits a carrier wave signal to the handset when a calling signal is received by the base, and only when it is confirmed that the handset is in standby mode. Since it is now possible to talk between the handset and the base unit, it is no longer possible to leave the handset unattended without knowing that it is in an inactive state.

[Brief explanation of drawings]

FIG. 1 is a block diagram of the base unit of the wireless telephone of the present invention, and FIG.
3 and 3 are block diagrams of the handset of the wireless telephone according to the present invention, FIG. 4 is a block diagram of the control circuit used in the base unit, and FIG. 5 shows the code signals used in the present invention. This is a diagram. (1)...Base unit, (2)...Telephone line, (3)
...Control circuit, (4)...PLL, (
5)...Transmission circuit, (6)...Transmission circuit, (7
)...first detection circuit, (8)...second detection circuit,
(251...Reception circuit, c!9)...Transmission circuit, C3)...Carrier detection circuit, (support))...
detection circuit. Applicant Sanyo Electric Co., Ltd. and one other agent Patent attorney Shizuo Sano Figure 3 4

Claims (1)

[Claims] (1) Consisting of a base unit connected to a telephone line and a slave unit capable of communicating with the base unit wirelessly, a carrier wave having the same frequency as that received by the slave unit from the base unit When the handset is in a standby state, the transmitting circuit is operated by receiving the carrier wave signal, and the handset transmits a carrier wave signal of a frequency determined by the handset, and the carrier wave signal from the handset is activated. A wireless telephone characterized in that, in addition to a control circuit, the status of a slave unit is determined when reception is received by a base unit. (2. In claim (1), a carrier wave signal detection circuit is provided in the slave unit, and the carrier wave signal detection circuit detects the carrier wave signal transmitted from the base unit, and the transmitting circuit of the slave unit is operated. (3) In claim (1), the carrier wave signal transmitted from the base unit is controlled by the control circuit.
1. The knowledge of the benefit of the organization 5! 1. A radio telephone characterized in that an identification signal is modulated by an I+4 signal and received by a handset, and an identification signal detection circuit identifies an identification signal from a carrier signal, and adds the identification signal to a control circuit to operate a transmission circuit of the handset.