JPH09252487A - Mobile telephone system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To use a PHS(personal handyphone system) terminal even inside a train or the like moving at a medium high speed by providing a converter for mutually converting medium high speed mobile object signals and PHS signals in a mobile object, performing medium high speed mobile communication between the mobile object and a fixed station at the outside and performing PHS communication inside the mobile object. SOLUTION: The medium high speed mobile communication is performed between a mobile terminal equipment 1 and a relay station 3 connected to a fixed telephone network 4, the mobile terminal equipment 1 converts the PHS signals from a PHS base station 5 connected to the mobile terminal equipment 1 to the medium high speed mobile object signals and transmits them to the relay station 3, the mobile terminal equipment 1 converts the medium speed mobile object signals from the relay station 3 to the PHS signals inversely and transmits them to the PHS base station 5 and communication is performed by using the PHS terminal 6 even inside the train moving at the medium high speed. Then, in the case that medium high speed form data are inputted from a reception part, the conversion control part of the mobile terminal equipment 1 converts data matched with the format of PHS form data and outputs them as the PHS form data to a communication control part.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mobile telephone system device using a PHS, and more particularly to a mobile telephone system which enables use of the PHS in a train or a ship moving at medium and high speeds.

[0002]

2. Description of the Related Art First, as an example of a conventional mobile telephone system, a case of making a call to a general subscriber telephone from the inside of a train or the like that moves at a medium or high speed will be described with reference to FIG.
FIG. 4 shows an in-car telephone system of a train, a mobile phone system, and a PHS (Personal) as a conventional mobile telephone system.
It is a schematic explanatory view showing an example of (Handy-phone System).
As shown in FIG. 4, the conventional in-car telephone system includes a mobile terminal equipment 1'provided in a train and provided with an antenna, a public telephone 2 connected to the mobile terminal equipment 1 ', and a switching controller. Relay station 3 as an external fixed station connected to fixed telephone network 4 and transmitting / receiving to / from mobile terminal equipment 1'in the train
It is composed of

When making a call from the public telephone 2 in the vehicle to the subscriber telephone 41, the signal transmitted from the public telephone 2 is modulated in the mobile terminal equipment 1'and transmitted through the antenna, and the relay station 3 is , Receives a signal from the mobile terminal equipment 1 ', sends it out to the fixed telephone network 4 via the line, and is connected to the subscriber telephone 41 via the exchange controller of the fixed telephone network 4 to make a call. ing.

There is a mobile phone system as another conventional mobile phone system. As shown in FIG. 4, the mobile phone system is a mobile phone for carrying out transmission / reception between the mobile terminal 7 carried by a user and the mobile terminal. It is composed of a base station 8 and a mobile telephone exchange station 9 which is connected to the fixed telephone network 4 and controls a plurality of mobile telephone base stations 8. Then, the signal transmitted from the mobile phone terminal 7 is connected to the fixed telephone network 4 via the mobile telephone base station 8 and the mobile telephone exchange station 9, and is connected to the desired subscriber telephone 41. .

Recently, as a mobile telephone system that can be used at a lower cost than conventional mobile telephones, PHS (Personal)
Handy-phone System) has been introduced and is rapidly spreading. As shown in FIG. 3, in the PHS, a PHS base station 5 connected to the fixed telephone network 4 is provided to perform transmission / reception with the PHS terminal 6, and the PHS terminal 6 is
It is possible to talk with the subscriber telephone 41 connected to the fixed telephone network 4 via the HS base station 5.

A feature of PHS is that the area covered by the base station is small (microcell system).
Base stations such as car telephones cover an area with a radius of 1.5 km to several km, while PHS base stations have a radius of 100 km to 100 km.
It covers an area of 300m. As described above, the use of the microcell system has the advantages that the power consumption of the terminal and the base station can be reduced, and a large number of small-sized and inexpensive base stations can be installed in a building or an underground mall.

In a mobile phone or PHS, a base station controlling communication changes every time the terminal moves and the area changes (handover). However, in the mobile phone, the terminal moves at medium and high speeds because the area is large. However, the number of handovers is small and medium to high speed mobile communication is possible.

[0008]

However, in the above-mentioned conventional mobile telephone system using the PHS, since the area radius covered by the base station is small, handover frequently occurs when the terminal attempts to move at medium and high speeds. Then, the function cannot be followed and communication becomes impossible, so that there is a problem that it can be used only at a walking speed and it is inconvenient.

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a mobile telephone system capable of performing communication using a PHS terminal from the inside of a train or the like moving at medium and high speeds. To do.

[0010]

The invention according to claim 1 for solving the above-mentioned problems of the prior art is, in a mobile telephone system, a medium-high-speed mobile signal used for medium-high-speed mobile communication in a mobile body. A conversion device for mutually converting a PHS signal used in PHS communication is provided, medium-high speed mobile communication is performed between the mobile body and the fixed station, and PHS communication is performed inside the mobile body. Therefore, the PHS terminal can be used even inside a train or the like that is moving at medium to high speed, and convenience can be improved.

In order to solve the above-mentioned problems of the conventional example, the invention according to claim 2 is, in a mobile telephone system, mobile terminal equipment for carrying out medium to high speed mobile communication with a mobile body with an external fixed station. PHS for PHS communication with PHS terminals
A base station is provided, and the mobile terminal equipment includes a first receiving unit that receives a medium-high speed mobile signal used in medium-high speed mobile communication, and a second receiving unit that receives a PHS signal used in PHS communication.
And a converter for converting the medium-high speed mobile body signal received by the first receiver into a PHS signal and converting the PHS signal received by the second receiver into a medium-high speed mobile body signal.
The PHS signal converted by the converter is converted into the PHS signal.
The mobile terminal equipment is characterized in that the mobile terminal equipment includes a first transmitting unit for transmitting to the base station and a second transmitting unit for transmitting the medium-high speed mobile body signal converted by the converting unit to the fixed station. , PHS between mobile terminal equipment and PHS base station
By communicating with a signal and communicating between the mobile terminal equipment and the fixed station by medium to high speed mobile communication, the PHS terminal can be used inside a train or the like moving at medium to high speed,
It is possible to improve convenience.

In order to solve the problems of the above-mentioned conventional example, the invention according to claim 3 is a mobile telephone system, wherein in a mobile terminal equipment, mobile terminal equipment for performing medium to high speed mobile communication with an external fixed station is provided. , PHS for PHS communication with PHS terminals
A base station, wherein the PHS base station receives a PHS signal used in PHS communication, and a first receiving unit that receives a medium-high speed mobile signal used in medium-high speed mobile communication;
And a converter for converting the medium-high speed mobile body signal received by the first receiver into a PHS signal and converting the PHS signal received by the second receiver into a medium-high speed mobile body signal.
The PHS signal converted by the converter is converted into the PHS signal.
The PHS base station is characterized by being provided with a first transmission unit for transmitting to the terminal and a second transmission unit for transmitting the medium-high speed mobile body signal converted by the conversion unit to the mobile terminal equipment. , PH between the PHS base station and the PHS terminal
By communicating by S signal and communicating between the PHS base station and the mobile terminal equipment by medium to high speed mobile communication, the PHS terminal can be used inside a train or the like moving at medium to high speed, which is convenient. Can be improved.

[0013]

Embodiments of the present invention will be described with reference to the drawings. A mobile telephone system (this system) according to an embodiment of the present invention is provided in a car such as a train.
A base station for S is provided, and a function for converting signals (medium-high speed mobile signals) used in conventional mobile phones and PHS signals to each other is added to mobile terminal equipment installed in trains. However, the PHS signal is communicated between the PHS base station and the mobile terminal equipment, and the mobile terminal equipment and the relay station are communicated by the medium-high speed mobile signal. However, it enables communication using a PHS terminal.

FIG. 1 is a block diagram of a mobile telephone system (present system) according to an embodiment of the present invention.
It should be noted that portions having the same configuration as in FIG. As shown in FIG.
PHS base station 5 provided in a train or the like and a mobile IS
A mobile terminal equipment 1 which is a terminal of a system capable of communicating even during medium and high speed movement such as DN and a relay station 3 as a fixed station which is connected to a fixed telephone network 4 and controls communication with the mobile terminal equipment 1.
The PHS base station 5 is connected to the mobile terminal equipment 1 by a cable. Also, PHS
The base station 5 and the relay station 3 are the same as conventional ones. Furthermore, although the moving body is a train here, the same applies to ships and aircraft.

The mobile terminal equipment 1 is a characteristic part of this system, is a terminal of a medium-high speed mobile communication system, and
Signals used for communication with the relay station 3 (middle and high speed mobile signals) and signals used in PHS (PHS
Signal) and the function of mutually converting. Then, it communicates with the relay station 3 by a medium-high speed mobile signal, and the PHS
The base station 5 communicates with a PHS signal.

By the way, a mobile ISDN capable of communicating at a high speed and a medium speed, a medium speed mobile signal used in a conventional mobile phone system and an in-car phone system, and a PHS signal used in PHS communication are: Since the signal format and output are different, it is impossible for the relay station 3 and the PHS base station 5 to directly communicate with each other.

Therefore, in this system, the mobile terminal equipment 1
And the relay station 3 connected to the fixed telephone network 4 perform medium to high speed mobile communication, and further connect the PHS base station 5 to the mobile terminal equipment 1 to move the PHS signal from the PHS base station 5. The terminal equipment 1 converts the medium-high speed mobile signal to the relay station 3 and transmits it to the relay station 3, and conversely, the mobile terminal equipment 1 converts the medium-high speed mobile signal from the relay station 3 into a PHS signal, and the PHS base station. By sending to station 5, P
The HS terminal 6 is used to make a call.
The configuration and operation of the mobile terminal equipment 1 will be described in detail later.

Further, the PHS base station 5 is similar to the conventional one,
It controls PHS communication in a certain area and is provided in each vehicle in the train. Since the PHS base station 5 is fixed inside the train, it actually moves at the same medium and high speed as the train, but the relative positional relationship with the PHS terminal 6 carried by the user inside the train does not change much. Therefore, there is no problem in communication between the PHS base station 5 and the PHS terminal 6. Also,
Even when the user moves the vehicle, the relative speed of the PHS terminal 6 with respect to the PHS base station 5 is about the walking speed, so that the handover can be easily performed.

For example, when making a call between the PHS terminal 6 in the vehicle and the subscriber telephone 41, the PHS signal from the PHS terminal 6 is received by the PHS base station 5 and sent to the mobile terminal equipment 1 via the cable. It In the mobile terminal equipment 1, the received PHS signal is converted into a medium-high speed mobile signal,
It transmits from the antenna to the relay station 3. And relay station 3
However, by transmitting the medium-high speed mobile signal transmitted from the mobile terminal equipment 1 to the fixed telephone network 4 as in the conventional case, the subscriber telephone 4
1 is transmitted.

Next, communication between the mobile terminal equipment 1 and the PHS base station 5, which is a characteristic part of this system, will be described with reference to FIG. Fig. 2 shows the mobile terminal equipment 1 of this system.
3 is a block diagram showing the configuration of a PHS base station 5. FIG. As shown in FIG. 2, the mobile terminal equipment 1 includes an antenna 11 for transmitting and receiving data to and from the relay station 3, and demodulates the received medium and high speed mobile signal to obtain digital data in the medium and high speed mobile signal format (medium and high speed format data). ), And the medium and high speed format data and PHS signal format data (PHS format data)
And a PHS base station 5 for converting between and
A communication control unit 14 for controlling communication with the conversion control unit 13
And a transmission unit 15 that modulates the medium- and high-speed format data received from the device 1 to a medium- and high-speed mobile signal and transmits the signal via the antenna 11.

The conversion control unit 13 has a data format of data (medium-high speed format data) used in the medium-high speed mobile signal and data used in the PHS signal (PH).
S format data),
When the medium-high speed format data is input from the receiving unit 12, the data is read, the data is converted according to the format of the PHS format data, and the data is output to the communication control unit 14 as PHS format data.

On the contrary, the conversion control unit 13 has the communication control unit 14
When the PHS format data is input from the PHS base station 5 via the, the data is read, the format of the medium-high speed format data is referred to, the input data is converted to the medium-high speed format data, and the data is sent to the transmission unit 15. It is a thing. Therefore, the data on the transmission path is PHS format data, and the PHS base station 5 handles only PHS format data for transmission / reception, so that the configuration and operation similar to the conventional one may be used.

The communication control unit 14 receives the PHS format data from the PHS base station 5 transmitted through the transmission line, and the P control unit 13 transmits the PHS format data.
And a transmitter for outputting the HS format data to the transmission path.

Further, as shown in FIG. 2, the PHS base station 5
Is connected to the mobile terminal equipment 1 via a transmission line,
An antenna 51 for transmitting and receiving to and from the PHS terminal 6,
A transmission unit 52 that modulates format data for transmission and transmits it via the antenna 51, a reception unit 53 that demodulates the signal received by the antenna 51 and extracts data in PHS format, the mobile terminal equipment 1, and PHS format data. And a communication control unit 54 that transmits and receives.

Next, the operation at the time of communication between the mobile terminal equipment 1 and the PHS base station 5 will be specifically described with reference to FIG. When the mobile terminal equipment 1 receives the medium-high speed mobile body signal from the relay station 3 by the antenna 11, the receiving unit 12 demodulates the received signal, extracts the data in the medium-high speed mobile body signal format, and the conversion control unit 13 Send to. When the medium-high speed format data is input, the conversion control unit 13 converts it according to the format of the PHS format data and sends it as PHS format data to the communication control section 14, and the communication control section 14 receives the input PHS format data. Output the data to the transmission line.

Then, the communication control unit 54 of the PHS base station 5
Then, when the PHS format data is received from the transmission path, the transmitter 52 modulates the PHS signal into the PHS signal and outputs the PHS signal via the antenna 51. Then, the PHS terminal 6 in the car
It is designed to receive the S signal.

On the contrary, the PHS signal from the PHS terminal 6 is
When the antenna 51 of the PHS base station 5 receives, the receiving unit 5
3 is converted into PHS format data, and the communication control unit 54 outputs it to the transmission path. Then, the communication control unit 1 of the mobile terminal equipment 1
4 receives the PHS format data, the conversion control unit 13
However, the data is converted into medium-high speed format data, further modulated into a medium-high speed mobile body signal in the transmission unit 15, and transmitted from the antenna 11 to the relay station 3. In this way, the operation of the mobile terminal equipment 1 and the PHS base station 5 of this system is performed.

According to the present system, the PH connected to the mobile terminal equipment 1 capable of medium and high speed mobile communication is provided in a car such as a train.
Since the S base station 5 is provided and the mobile terminal equipment 1 is provided with the conversion control unit 13 for mutually converting the data in the medium-high speed mobile signal format (medium-high speed format data) and the PHS format data, the PHS is provided. PHS between terminal 6 and PHS base station 5
By communicating by signals, PHS base station 5 and mobile terminal equipment 1 communicate by PHS format data, and mobile terminal equipment 1 and external relay station 3 communicate by medium and high speed mobile signals, The PHS terminal 6 can be used in a train such as a train moving at medium and high speeds, and there is an effect that convenience can be improved.

Further, in the present system (first example), a conversion control unit having a conversion function between medium and high speed format data and PHS format data is provided on the mobile terminal equipment 1 side, but as another system, It is also possible to provide the conversion control unit on the PHS base station 5 side. Another system according to the embodiment of the present invention will be described with reference to FIG. FIG. 3 is a block diagram showing a configuration of mobile terminal equipment and a PHS base station in another mobile telephone system according to the embodiment of the present invention.
As shown in FIG. 3, in another system, there is no conversion control unit on the side of the mobile terminal equipment 1 ', and a conversion control unit 55 is provided on the side of the PHS base station 5', which is different from the first example. There is.

In the other system, when the PHS base station 5'receives the PHS signal from the PHS terminal 6, the receiving section 53 demodulates the PHS format data and the conversion control section 55 outputs the PHS format data. When the PHS base station 5'receives the medium-high speed format data from the transmission path after converting it to the high-speed format data and transmitting it to the mobile terminal equipment 1'through the transmission path, the PHS is converted by the conversion control unit 55.
The data is converted into format data and further modulated by the transmission unit 52 to send the PHS signal to the PHS terminal 6. That is, in the above another example, communication is performed by medium-high speed format data on the transmission line between the mobile terminal equipment 1'and the PHS base station 5 '.

In the other mobile telephone system described above, P
Since the HS base station 5'is provided with the conversion control unit 55 for mutually converting the medium-high speed format data and the PHS format data, the PHS signal is communicated between the PHS terminal 6 and the PHS base station 5 '. , The PHS base station 5'and the mobile terminal equipment 1'communicate with medium and high speed format data, and the mobile terminal equipment 1'and the external relay station 3 communicate with middle and high speed mobile signals, The PHS terminal 6 can be used in a train such as a train moving at medium and high speeds, and there is an effect that convenience can be improved.

[0032]

According to the first aspect of the present invention, the mobile device is provided with the conversion device for mutually converting the medium-high speed mobile signal and the PHS signal, and the medium-high speed is provided between the mobile device and the external fixed station. Since the mobile telephone system performs mobile communication and performs PHS communication inside the mobile body, the PHS terminal can be used even in a train or the like moving at medium to high speed, and convenience can be improved. effective.

According to the second aspect of the present invention, the mobile terminal is provided with a mobile terminal facility for performing medium to high speed mobile communication with an external fixed station, and a PHS base station for performing PHS communication with the PHS terminal. The mobile terminal equipment is provided with a converter for converting a medium-high speed mobile signal received from a fixed station into a PHS signal and converting a PHS signal received from a PHS base station into a medium-high speed mobile signal. Since the mobile telephone system transmits to the base station and the medium-high speed mobile signal to the fixed station, the PHS signal is communicated between the mobile terminal equipment and the PHS base station, and between the mobile terminal equipment and the fixed station. By using the medium to high speed mobile communication, the PHS terminal can be used inside a train or the like that is moving at the medium to high speed, and the convenience can be improved.

According to the third aspect of the present invention, the mobile unit is provided with a mobile terminal facility for performing medium to high speed mobile communication with an external fixed station, and a PHS base station for performing PHS communication with the PHS terminal. A PHS base station is provided with a conversion unit for converting a medium-high speed mobile signal received from a mobile terminal equipment into a PHS signal and converting a PHS signal received from a PHS terminal into a medium-high speed mobile signal. Since it is a mobile telephone system that transmits to the terminal and transmits the medium and high speed mobile signals to the mobile terminal equipment, P between the PHS base station and the PHS terminal
By communicating with the HS signal and communicating between the PHS base station and the mobile terminal equipment by medium to high speed mobile communication, the PHS terminal can be used inside a train or the like moving at medium to high speed, which is convenient. There is an effect that can improve.

[Brief description of drawings]

FIG. 1 is a configuration block diagram of a mobile telephone system (present system) according to an embodiment of the present invention.

FIG. 2 is a block diagram showing the configurations of a mobile terminal equipment 1 and a PHS base station 5 of the present system.

FIG. 3 is a block diagram showing configurations of a mobile terminal equipment and a PHS base station in another mobile telephone system according to the embodiment of the present invention.

FIG. 4 is a conventional mobile phone system including an in-car phone system for a train, a mobile phone system, and a PHS (Personal).
It is a schematic explanatory view showing an example of (Handy-phone System).

[Explanation of symbols]

1 ... mobile terminal equipment, 2 ... public telephone, 3 ... relay station,
4 ... Fixed telephone network, 5 ... PHS base station, 6 ... PHS terminal, 7 ... Mobile terminal, 8 ... Mobile phone base station, 9 ... Mobile phone exchange station, 11 ... Antenna, 12 ... Receiving part, 1
3 ... Conversion control part, 14 ... Communication control part, 15 ... Transmission part, 41 ... Subscribed telephone, 51 ... Antenna, 52 ... Transmission part, 53 ... Reception part, 54 ... Communication control part, 55 ... Conversion control part

Claims (3)

[Claims] 1. A mobile unit is provided with a conversion device for mutually converting a medium-high speed mobile signal used in medium-high speed mobile communication and a PHS signal used in PHS communication, and between the mobile unit and the fixed station. Performs high-speed mobile communication, and performs PHS communication inside the mobile body. 2. A mobile terminal facility for performing medium to high speed mobile communication with an external fixed station and a PHS terminal for a mobile body.
A PHS base station that performs HS communication is provided, and the mobile terminal equipment includes a first reception unit that receives a medium-high speed mobile signal used in medium-high speed mobile communication, and a PH used in PHS communication.
A second receiving unit that receives an S signal, and a medium-high-speed mobile body signal received by the first receiving unit are converted into a PHS signal, and the PHS signal received by the second receiving unit is converted into a medium-high-speed mobile body signal. And a P converted by the conversion unit.
A mobile terminal facility comprising: a first transmitter that transmits an HS signal to the PHS base station; and a second transmitter that transmits the medium-high speed mobile signal converted by the converter to the fixed station. A mobile telephone system characterized in that 3. A mobile terminal device for performing medium-high speed mobile communication with an external fixed station and a PHS terminal for a mobile body.
A PHS base station for performing HS communication is provided, and the PHS base station receives a medium-high speed mobile signal used for medium-high speed mobile communication, and a PH used for PHS communication.
A second receiving unit that receives an S signal, and a medium-high-speed mobile body signal received by the first receiving unit are converted into a PHS signal, and the PHS signal received by the second receiving unit is converted into a medium-high-speed mobile body signal. And a P converted by the conversion unit.
A first transmitter for transmitting an HS signal to the PHS terminal;
A second transmission unit for transmitting the medium-high speed mobile body signal converted by the conversion unit to the mobile terminal equipment.
A mobile telephone system characterized by being a base station.