JPH04335723A - Radio telephone system - Google Patents

Abstract

PURPOSE:To allow one mobile station to use two radio telephone services comprising a radio telephone service used for high speed movement and a radio telephone service used at low speed movement only whose utility charge is lower than the high speed movement radio telephone service in radio communication. CONSTITUTION:A mobile station 13 is provided with a 1st control section 3 and a detection section 2, and an on-vehicle private base station 14 is provided with a 2nd control section 7, a frequency conversion section 10 and a start detection section 6 to use two different radio telephone networks. The connection to the radio telephone network is selected automatically by having only to turn ON/OFF a ignition key of a vehicle to implement protocol conversion and telephone number conversion. Through the constitution above, one mobile station 13 uses two different radio telephone networks A, B.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to radio telephone equipment.

0002

2. Description of the Related Art In recent years, radio telephone devices have become widely used as their convenience and economy have improved, and among them, cellular telephones have become particularly popular.

[0003] A conventional wireless telephone device will be explained below with reference to the drawings. FIG. 4 is a general block diagram of a conventional wireless telephone device. In FIG. 4, 17 is an antenna, 18 is a radio unit that performs signal transmission/reception and modulation/demodulation;
Reference numeral 19 denotes an audio processing unit that processes audio signals such as expansion and compression, 20 a data processing unit that processes dialed digit signals, etc., 21 a control unit that controls the entire telephone device, and 22 a telephone number input from the outside. 23 is a display section that displays input from the keypad section and information such as received field strength; 24 is a speaker that outputs audio; 25 is a microphone that inputs audio;
6 is a communication processing unit including 15-21.

The operation of the conventional radio telephone device configured as described above will be explained below. In conventional wireless telephone devices, when making a call, input such as dial input is converted into a data signal by the keypad section 22, voice input is converted into a voice signal by the microphone 25, and the control section 21 converts the voice signal and data signal. and control the received electric field strength information signal, etc.
The display unit 23 displays input from the keypad unit 22, the audio processing unit 19 performs compression of audio signals, and the data processing unit 20 processes control signals and the like. These audio signals, control signals, etc. are modulated by the radio section 18 and transmitted via the antenna 17.

[0005] When an incoming call is received, an incoming signal is input through the antenna 17, received and demodulated by the radio section 18, and converted into a voice signal and a control signal. The audio processing unit 19 performs expansion of audio signals, and the data processing unit 20 processes control signals and the like. The control unit 21 controls the audio signal, the data signal, the received electric field strength information signal, etc., the audio signal is converted into an output by the speaker 24, and the information such as the received electric field strength is displayed on the display unit 23.

[0006]

[Problems to be Solved by the Invention] However, when the conventional radio telephone device described above is used in a radio telephone network with different transmission power, frequency band, protocol, telephone number, call charge, etc. The problem was that it required

SUMMARY OF THE INVENTION It is an object of the present invention to solve the above problems and provide a wireless telephone device that can be used alone even in different wireless telephone networks.

[0008]

[Means for Solving the Problems] In order to solve the above problems, the wireless telephone device of the present invention is capable of wireless communication even in different wireless communication networks when used alone as a mobile station or in combination with an in-vehicle private base station. The following means are provided.

That is, the mobile station side includes a detection section that detects a transmission power control request signal sent from an in-vehicle private base station, and a first control section that performs transmission power control based on the signal detected by this detection section. In addition, the in-vehicle private base station side has a start detection section that detects when the car starts and stops, and a transmission power control request signal that is sent from the ignition ON/OFF signal sent from the start detection section. a second control unit that generates a signal, performs protocol conversion and telephone number conversion, and controls the mobile station control signal output; a second radio unit that can transmit, receive, and modulate/demodulate power-controlled signals for in-vehicle use; The mobile station is provided with a frequency conversion section that converts the frequency of the mobile station to a frequency of a different radio telephone network service, and a third radio section that has an output for a different radio telephone network service than that of the mobile station.

0010

[Operation] With the above-described configuration, the present invention uses one mobile station and can be used in a car by simply turning on the ignition key.
By using a mobile station and an in-vehicle private base station together, you can automatically communicate on wireless telephone network B, which is different from the mobile station and can handle high-speed movement, and is cheaper than the above wireless telephone network B when using only the mobile station outside the vehicle. It is possible to communicate using the mobile station's wireless telephone network A, which charges a telephone call fee.

[0011]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a block diagram showing a wireless telephone device according to an embodiment of the present invention.
as GSM (Group Special Mobi)
PCN (Personal
Communications Network)
think of.

In FIG. 1, reference numeral 1 denotes a communication processing section, which operates in the same way as the communication processing section 26 of the conventional example explained in FIG. 2 is a detection unit that detects a transmission power control request signal sent from the mobile station in-vehicle antenna 9 of the GSM in-vehicle private base station 14; 3 is a unit that controls transmission power based on the transmission power control request signal detected by the detection unit 2; This is the first control unit that performs the following. 4 is a modulation/demodulation and transmission/reception unit in a conventional mobile station;
The first radio section 5 is an antenna of the mobile station, which functions as a modulation/demodulation and transmitting/receiving section after performing transmission power control. The PCN mobile station 13 is configured above.

The configuration of the GSM vehicle-mounted private base station 14 is as follows. 6 is a start detection unit that detects when the car starts and stops; 7 is a start detection unit that generates a transmission power control request signal based on the ignition ON/OFF signal sent from the start detection unit 6, and also performs protocol conversion and telephone number conversion. This is a second control unit that controls the mobile station control signal output as well as the mobile station control signal output. 8 is a power-controlled signal (PCN) for inside the car.
a second radio section capable of transmitting/receiving and modulating/demodulating at a frequency of 9;
is an in-vehicle antenna for a PCN mobile station that transmits and receives minute radio waves that do not affect the outside of the vehicle. 10 is PCN⇔
A frequency conversion unit that converts the frequency to GSM (wireless telephone network service with different frequencies), 11 is a GSM wireless telephone network B
A third radio section 12 is an antenna outside the vehicle for a GSM base station.

[0014] The operation of the radio telephone device configured as described above will be explained below. Wireless telephone network B (GSM)
has a wide range of services. Moreover, the serviceable range of the wireless telephone network A (PCN) occupies only a part of the above-mentioned services. Typically, users of wireless telephone equipment:
As shown in Figure 3, a PCN mobile station 13 and a PCN base station 1 are installed outside the vehicle.
6, wireless telephone network A (PCN), which has lower call charges than wireless telephone network B (GSM), is used. As shown in FIG. Since telephone network A (PCN) cannot be used, wireless telephone network B (
GSM).

In the vehicle, first, when the ignition key is turned on, the start detection section 6 detects the ignition key ON signal, and the second control section 7 detects the ignition key ON signal.
turns on the power, generates a transmission power control request signal, and the second radio section 8 modulates and transmits. This signal is P
It is sent via the in-vehicle antenna 9 for the CN mobile station and the antenna 5 of the PCN mobile station, the first radio section 4 receives and demodulates this transmission power control request signal, and the detection section 2 receives and demodulates this transmission power control request signal. To detect. The first control unit 3 performs power control so that the radio waves transmitted from the PCN mobile station 13 thereafter do not go outside the vehicle.

When making a call, the first control section 3 controls the communication processing section 1.
(operation similar to that of the communication processing section 26 in FIG. 4) controls the transmission power of the transmission signal generated from the first radio section 4, and modulates and transmits it. This transmission signal is sent via the antenna 5 of the PCN mobile station and the in-vehicle antenna 9 for the PCN mobile station, the second radio section 8 receives and demodulates it, and the second control section 7 performs protocol conversion and telephone number conversion. with PCN mobile station 1
Controls the transmission output of the control signal No. 3. Frequency converter 10
converts this into the frequency of wireless telephone network B (GSM), the second control section 7 controls the transmission power to wireless telephone network B (GSM), and the third radio section 11 modulates and transmits it to the GSM base station. wireless telephone network B (GSM) via the external antenna 12 for
and communicates with the GSM base station 15.

When receiving a call, a signal from the wireless telephone network B (GSM) is received via the external antenna 12 for the GSM base station, the third radio unit 11 receives and demodulates the signal, and the second control unit 7 performs protocol conversion and phone number conversion. The frequency conversion unit 10 converts this to the frequency of the wireless telephone network A (PCN), and the second control unit 7 performs power control for the in-vehicle radio. Furthermore, the second radio unit 8 modulates and transmits the signal to the PCN
The signal is sent via the in-vehicle antenna 9 for the mobile station and the antenna 5 of the PCN mobile station 13, the first radio section 4 receives and demodulates it, and the communication processing section 1 outputs audio and data.

[0018] When returning to the state where the PCN mobile station 13 is a single unit,
The ignition key is turned OFF, the start detection section 6 detects the ignition OFF signal, and the second control section 7 generates a transmission power control signal to restore the transmission power to the original state. The second radio unit 8 modulates and transmits this transmission power control signal, and this signal is transmitted to P
In-vehicle antenna 9 for CN mobile station and PCN mobile station 13
The first radio section 4 receives and demodulates the signal. The detection unit 2 detects this transmission power control signal, the first control unit 3 performs power control, and the first control unit 3 generates a confirmation signal indicating that the transmission power has returned to that of a single mobile station. The first radio unit 4 modulates and transmits this confirmation signal, and this signal is sent via the antenna 5 of the PCN mobile station 13 and the in-vehicle antenna 9 for the PCN mobile station, and the second radio unit 8 receives and demodulates the signal. , the second control unit 7 turns off the power of the GSM vehicle-mounted private base station 14.

[0019]

[Effects of the Invention] As described above, according to the present invention, two different
It has a function that allows wireless communication on both wireless telephone networks.
Outside the vehicle, you can communicate using wireless telephone network A, which has lower call charges than wireless telephone network B, using only the mobile station, while inside the vehicle, you can communicate using wireless telephone network B using both the mobile station and the private vehicle base station.
can be communicated with.

[Brief explanation of drawings]

FIG. 1 is a block diagram showing the circuit configuration of a wireless telephone device according to an embodiment of the present invention.

FIG. 2 is a block diagram illustrating an example of the use of a wireless telephone device in an embodiment of the present invention.

FIG. 3 is a block diagram illustrating another usage example of the wireless telephone device in one embodiment of the present invention.

FIG. 4 is a block diagram showing the configuration of a conventional wireless telephone device.

[Explanation of symbols]

1 Communication processing unit 2 Detection unit 3 First control unit 4 First radio unit 5 PCN mobile station antenna 6 Start detection unit 7 Second control unit 8 Second radio unit 9 In-vehicle antenna 10 for PCN mobile station
Frequency converter 11 Third radio unit 12 External antenna 13 for GSM base
PCN mobile station 14 GSM vehicle private base station 15
GSM base station 16 PCN base station

Claims (2)

[Claims] Claim 1: A detection unit that detects a transmission power control request signal sent from an in-vehicle private base station on the mobile station side, and a first control unit that performs transmission power control based on the signal detected by the detection unit. and a first radio unit that performs transmission, reception, and modulation/demodulation, generates a transmission power control request signal to the in-vehicle private base station, performs protocol conversion and telephone number conversion, and controls mobile station control signal output. A second control unit, a second radio unit that can transmit/receive and modulate/demodulate power-controlled signals for in-vehicle use, and a frequency conversion unit that converts the frequency of the mobile station to the frequency of a different wireless telephone network service, which are different from the mobile station. and a third radio section having an output for a radio telephone network service. Claim 2: The second control unit sends a transmission power control request from the in-vehicle private base station to the mobile station in response to an ignition key ON/OFF signal sent from a start detection unit that detects when the car starts and stops. 2. The radiotelephone device according to claim 1, wherein the radiotelephone device generates a signal and controls the transmission power of the mobile station as a result.