JP3062918B2 - Wireless communication device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a PHS for performing a mobile communication in a relatively narrow range on a wireless communication network for providing a wide area service.
The present invention relates to a wireless communication device for connecting a mobile device.

[0002]

2. Description of the Related Art As a typical wireless communication network for providing a wide area service, there is an automobile / mobile phone network. The transmission output of these wireless systems is 1 W or more, and the reach of radio waves is 2-1.
It extends over 0 km. On the other hand, there is a simple portable system (hereinafter abbreviated as PHS) that enables communication using the same mobile device at home, in an office, or in the public. In PHS, the transmission power is specified at 10 mW,
The reach of radio waves is around 100 m. The advantages of PHS are that it is possible to communicate with a single mobile device at any time, from home calls to calls via the public line, regardless of the location and time. Is good, and the transmission output is small, so that the battery life is long. The disadvantages are
Since the reach is narrow, a large number of base stations must be installed, and it takes a long time and a lot of money to build a public network. Is worse, so that only movement at a walking speed is possible.
For the advantages and disadvantages of the car / mobile phone system,
It can be said that it is almost the reverse of that of HS.

[0003]

In an environment in which wireless systems having such advantages and disadvantages coexist, a user using a mobile device can move his / her mobile / mobile phone terminal within a certain area when moving at high speed by car or the like. For example, when shopping at an underground mall or the like, two types of mobile units must be prepared and used, such as using a PHS terminal, which is cumbersome and inconvenient. Further, it is conceivable to use the PHS as a cordless telephone which is one of the usage forms at a work site. For example, in road construction, electricity and gas construction, it is conceivable that communication between workers at a work site is performed by a PHS terminal as a cordless telephone, and an instruction from the center or an inquiry to the center is performed by an automobile / mobile phone terminal. Also in this case, both the car / mobile phone terminal and the PHS terminal must be carried and used properly, which is inconvenient.

[0004] It is an object of the present invention to mutually complement the disadvantages of a car / portable telephone system and a PHS and to enable each user to connect to the car / portable phone system only by preparing one PHS terminal. Accordingly, it is an object of the present invention to provide a wireless communication device capable of realizing a convenient communication environment in which a car and a mobile phone service are added to a communication function such as a meeting call between a plurality of users realized by the PHS.

[0005]

In order to achieve this object, a wireless communication apparatus according to the present invention comprises a mobile / mobile telephone system.
Cars and mobile phones that have the function of performing wireless communication with the system
PH capable of communication between a talk mobile station and a plurality of PHS terminals
S fixed station, said car / mobile phone mobile station and
In order to transmit signals to and from the PHS fixed station,
Connected to the mobile / mobile phone mobile station and the PHS fixed station
Communication with mobile device configuration including connected connection lines
Device, wherein the car / mobile phone mobile station comprises:
Transmission and reception of wireless communication waves with automobile / mobile phone systems
And a first antenna for connecting to the first antenna
And receiving the output of the receiving side of the duplexer
And a first receiver connected to the transmitting side of the duplexer.
And the receiving side control information from the first receiver.
Automobile / mobile phone system receiving and transmitting to the first transmitter
To the PHS fixed local station
Control signal for performing communication with the plurality of PHS terminals
And a mobile / mobile phone mobile station control unit
In the PHS fixed station, the plurality of PHS terminals
A second antenna for transmitting and receiving wireless communication waves of
An antenna switch connected to the second antenna;
Second reception for receiving the receiver output of the antenna switch
And a second transmitter connected to the transmitting side of the antenna switch.
TDD control and time division multiplexing for time division separation
TDMA control, exchange control and conference call control for connection
Multiplexing unit for performing, the multiplexing unit and the mobile / mobile phone mobile station
A PHS-specific device for mutually transmitting the control signal with a control unit.
A fixed station control unit, and the mobile / mobile phone mobile station unit.
A first audio signal output from the first receiver is connected to the connection line.
Transmitted to the multiplexing unit via the
Call control or the basis of the exchange control and the TDMA control
Is input to the second transmitter as a multiplexed transmission signal,
The multiplexed reception signal from the second receiver is
Of the TDD control and the conference call control or the exchange control
As a second audio signal output via the connection line
Input to the first transmitter of the mobile / mobile phone mobile station,
The control signal from the car / mobile phone mobile station control unit
Is transmitted to the PHS fixed station controller via the connection line.
It is transmitted as the number of the PHS handsets control signal, the PH
The control signal from the S fixed station control unit is transmitted via the connection line.
To the mobile / mobile phone mobile station control unit.
Is transmitted as a control signal for the speech system,
The plurality of PHS terminals and the car / mobile phone system
Conference call connection between the PHS terminals and the plurality of PHS terminals.
Conference call connection or individual exchange call connection between
Each of a number of PHS terminals and the car / mobile phone system
Communication with the system is performed through the multiplexing unit.
It is configured to: The wireless communication device according to the present invention
In the above, the multiplexing unit of the PHS fixed local unit includes the TD
D control, the multiplexed reception from the second receiver.
A demultiplexing unit for demultiplexing the received signal,
From the output of the separation unit, the received signal of each channel and the PHS fixed station
Separate from the reception control signal as the control signal to the control unit
A deframing / decoding unit, wherein the conference call control or
For the exchange control, the received signal of each channel and the
From the first audio signal output from the first receiver
Outputting the second audio signal to a transceiver and the plurality of PHS terminals
Switching connection for extracting each channel's transmission signal to the end
And transmitting each of the channels for the TDMA control.
Transmission signal and a control signal for the plurality of PHS terminals.
To form a multiplexing frame by using a communication control signal
A second frame unit and the multiplexing frame;
Multiplexing unit for extracting the multiplexed transmission signal to the transmitter
And a configuration including:

[0006]

A mobile / mobile telephone mobile station and a PHS fixed station are provided to connect the respective receiver voice signal output and transmitter input, and to transmit a call signal, a dial signal and a call signal between respective control sections. By being configured to transmit, the voice signal and the control signal of the automobile / mobile phone system can be converted into the PHS voice signal and the control signal, and the plurality of PHS terminals are used by using the plurality of PHS terminals.
A conference call between them and the plurality of PHs
Each of the S terminals can access the car / mobile phone system.

[0007]

FIG. 1 is a block diagram showing a wireless communication mode using a wireless communication apparatus according to the present invention. In FIG. 1, 1
Is a car / mobile phone base station, 2 is a PHS public network base station,
Reference numeral 3 denotes a wireless communication apparatus according to the present invention, which comprises a mobile / mobile phone mobile station 31 and a PHS fixed station 32, and 4a
4n are PHS mobile devices. As an optimal use form of the wireless communication device 3 according to the present invention, the wireless communication device 3 is configured as a mobile device so as to be mounted on a passenger car or a work vehicle .
And In a place where radio waves from the PHS public network base station 2 do not reach the wireless communication device 3, one of the PHS mobile devices 4a to 4n, for example, 4a transmits to the wireless communication device 3 via the route 6a, and the route 7 The mobile telephone base station 1 is connected to the mobile telephone base station 1 to access and communicate with a vehicle / mobile telephone network. For short-range communication such as transceiver communication, the PHS mobile device 4
The communication is performed by extension communication via the wireless communication device 3 on the routes 6b and 6n as in b and 4n, or in the PHS direct inter-subunit communication mode by the route 8. In the communication in the city area, the PHS public network base station 2 is directly accessed via the route 5 like the PHS mobile device 4n without passing through the wireless communication device 3. In addition, one person at a remote location and a plurality of workers in the vicinity of the passenger car or the work vehicle communicate with each other in a conference format via the routes 7 to 6a, 6b, and 6n. In this type of conference-type communication, for example, instructions from the center are directly sent to workers during work, so work safety is ensured.In addition, workers at the center can understand the situation at the site more accurately. it can.

As described above, by using the wireless communication apparatus 3 according to the present invention, one PHS mobile device 4a to 4n can be used for multiple purposes, and the frequency can be effectively used. For example, if all workers are provided with a conventional mobile phone and try to use them for inter-worker communication and center communication, each mobile phone individually occupies the radio wave given to the automobile / mobile phone system, so that many frequencies are used. Need. On the other hand, if the wireless communication device 3 of the present invention is used, only one channel needs to reach a wide range of radio waves, and it is sufficient to use a required number of frequencies in a local range. can do.

FIG. 2 is a block diagram showing the configuration of a specific embodiment of the wireless communication apparatus 3 according to the present invention. Reference numeral 31 denotes a mobile / mobile phone mobile station, which includes an antenna 31a, a duplexer 31b, a receiver 31c, a transmitter 31d, and a mobile / mobile phone mobile station controller 31e. Reference numeral 32 denotes a PHS fixed station, and a PHS fixed station controller 32a,
b, transmitter 32c, receiver 32d, antenna switch 32
e, and an antenna 32f.

An antenna 31a is an input / output terminal for a modulated wave in a frequency band allocated to a car / portable telephone system.
The demultiplexer 31b is a circuit for sharing the antenna 31a for transmission and reception, and prevents a radio wave output from the transmitter 31d from going to the receiver 31c. The receiver 31c tunes to a carrier of a desired frequency and detects it to output a voice signal and a control signal such as a zone identification signal or an incoming call signal. The transmitter 31d modulates an audio signal together with a call signal or a control signal such as a dial signal and a position registration signal, converts the signal to a desired frequency, and transmits the signal. Car & Mobile Phone mobile station controller 31e, as shown in FIG. 3, if the incoming waiting state monitors the control signal outputted from the receiver 31c, a zone identification signal is changed (S _1), the location registration signal via the transmitter 31d to be transmitted to the automobile and mobile telephone system (S _2). When the position registration is completed, the process returns to the standby state. If an incoming call signal is received when the zone identification signal does not change (S ₃ ), it is transmitted to the PHS fixed station control unit 32a (S ₄ ), and if a response signal is received from the PHS fixed station control unit 32a (S ₃ ) S _5), establishes a link channel (S _6), enters the communication state. When an outgoing call is made, the PHS fixed station control unit 32
Upon receiving the calling signal from a (S _7), and requests a link channel establishment to automotive and portable telephone system (S _8). When a link channel is established (S ₉ ), P
Outputs link establishment completion signal to the HS fixed station controller 32a (S _10), sends the then received dial signal to the automobile and mobile telephone system, enters a communication state (S _11). When receiving the downlink disconnection signal during communication (S _12), and transmits the disconnection information to the PHS base station controller 32a (S _13), disconnects the communication channel (S _14). The PHS fixed station control unit 3
Even when receiving an uplink disconnect signal from 2a to cut the (S ₁₅₎ a communication channel. When the communication channel is disconnected, the state returns to the standby state.

The PHS fixed station control unit 32a performs call control, call control, and exchange control. In the incoming call control, as shown in FIG. 4, from automobiles, mobile phones mobile station control unit 31e receives the incoming call signal (S _21), PHS mobile station for example is specified in the PHS mobile station or sub-address to a predetermined 4
b to send the incoming call signal (S _22), PHS mobile station 4b
And when a link channel is established (S
_23), a response signal sent to the motor vehicle, a mobile phone the mobile station control unit 31e (S _24). If the PHS mobile station to be called in advance is not determined, all PHS mobile stations 4a to 4a
n, and a link channel is allocated to the PHS mobile device when any of the PHS mobile devices responds. In call control, when the PHS mobile station 4b when there is no incoming call signal is a link channel establishment request (S _25), transmitting the calling signal to the car, mobile phones mobile station controller 31e (S _26). If there is no link channel establishment request, the process returns to the standby state. After receiving the link establishment completion signal from the car / mobile phone mobile station control unit 31e (S
_27), establishing a link channel to PHS mobile 4b (S _28). Thereafter, receives a dial signal from the PHS mobile station 4b, transmitting a dial signal to the car, mobile phones mobile station controller 31e (S _29). Thereafter, connection control is performed between the audio signal input / output to / from the mobile / mobile phone mobile station unit 31 and the audio signal input / output to / from the PHS mobile device 4b. When receiving the uplink disconnect signal from the PHS mobile station during communication (S _30), and transmits the disconnection information to the automobile and portable telephone mobile station controller 31e (S ₃₁₎ to disconnect the communication channel (S _32). Also, the mobile / mobile phone mobile station control unit 31e
(S ₃₃ ), the communication channel is disconnected. When the communication channel is disconnected, the state returns to the standby state.

In the case of a conference call, as shown in FIG. 5, one communication channel is established (S ₄₁ ).
Then, while the communication is started via the path 6a, the presence or absence of the conference invitation signal is checked ( _S42 ). When the conference invitation signal is received, the PHS fixed station is sent to another communication partner to be invited, for example, the PHS mobile unit 4b. sending the incoming call signal from the control unit 32a (S _43), prompting a conference participant by establishing voice signal link channel (S _44). If there is no meeting invitation signal, the process enters a communication channel disconnection loop. PH on further request
S mobile Likewise audio signal adder against 4c performs convening connected (described later 320b) to (S ₄₅₎ to the conference. In a conference call, a conference call signal is transmitted to the PHS fixed station control unit 32a by pressing a conference key or a number key (not shown) provided on the PHS mobile devices 4a to 4c, and the call is started from that point. In the conference call, all communication channels are disconnected when the one communication channel is disconnected ( _S46 ), and the conference call ends. When the communication channel is disconnected, a standby state is entered.

FIG. 6 shows a specific embodiment of the multiplexing unit 32b, which is a TDMA (Time Division Multiple Access).
)-To perform TDD (Time Division Duplex) control, the switching connection unit 320, the audio encoding unit 326, the audio decoding unit 323, the frame assembling unit 327, and the deframe unit 3
24, a transmission multiplexing section 328, and a reception multiplexing / demultiplexing section 325. 320a is a switch group, and 320b is an adder.

FIG. 6 shows a case where the number of multiplexed PHSs is four.
In this example, three channels are assigned to a control channel and three channels are assigned to a voice channel. In FIG. 6, a switching connection unit 320 is a mutual conversion connection for analog audio of each channel.
And each channel via the mobile / mobile phone mobile station 31
Analog voice and analog sound of car / mobile phone system
Exchange connection with voice and conference call between each channel and each
In a portion for performing addition for a conference call in which a car / mobile phone system is added to a channel, the received voice signal RS output from the receiver 31c is X0, and the three received voice signals output from the voice decoding unit 323 are output. X1, X2, X3,
The transmission audio signal TS input to the transmitter 31d is set to Y0, and the three transmission audio signals input to the audio encoding unit 326 are set to Y3, Y2, and Y1 so as to correspond to the reception audio signals X1, X2, and X3.
And connection and addition are performed according to the following equation (1).

[0015]

(Equation 1) Here, S00 to S32 are switches, S00 is Y0 and X1, S01 is Y0 and X2, and S02 is Y.
0 and X3, S10 is Y1 and X0, S11 is Y1
, X1; S12, Y1 and X2; S20, Y2 and X0; S21, Y2 and X1; S22, Y2 and X1.
3, S30 is Y3 and X0, S31 is Y3 is X2
And S32 interconnects Y3 and X3, respectively.
In this case, the exchange connection control of each channel and each
Switching connection control between channel and car / mobile phone system
Is the case. In the case of conference call control , everything is on (=
In the case of 1), when the conference call is not performed, the switch at the position to be exchanged is turned off. The audio encoding unit 326 and the audio decoding unit 323 perform digital-to-analog conversion of audio. The frame assembling section 327 assembles a voice signal, a frame signal, a transmission control signal TC of the PHS fixed station control section 32a, and the like according to a format to generate a channel signal. The deframe unit 324 removes the frame signal, and outputs the audio signal to the audio decoding unit 323 by using the reception control signal R
C is passed to the PHS fixed station control unit 32a. Multiplexer 328
Time-division multiplexes the voice and control channels.
The demultiplexer 325 separates and distributes the channels.

The transmitter 32c responds to the multiplexed signal by
Modulation, frequency conversion, and amplification are performed and transmitted as a transmission signal. The receiver 32d receives the received signal, selects a desired carrier frequency, and performs frequency conversion and demodulation. The antenna switch 32e allows the output of the transmitter 32c to pass during the transmission period, and inputs a received radio wave to the receiver 32d during the reception period. The antenna 32f is an input / output terminal for a modulated wave in a frequency band assigned to the PHS.

[0017]

As has been detailed description, according to the present invention, by using the wireless communication apparatus according to the present invention, it is possible to perform a flexible wireless communications in most occasions The underbarrel one PHS mobile station also Telecommunications There is an advantage that resources can be effectively used.

[Brief description of the drawings]

FIG. 1 is a diagram illustrating a wireless communication mode using a wireless communication device of the present invention.

FIG. 2 is a block diagram illustrating a configuration of a wireless communication device according to the present invention.

FIG. 3 is a flowchart for explaining the operation of the present invention.

FIG. 4 is a flowchart for explaining the operation of the present invention.

FIG. 5 is a flowchart for explaining the operation of the present invention.

FIG. 6 is a block diagram illustrating details of a multiplexing unit used in the present invention.

[Explanation of symbols]

 Reference Signs List 1 automobile telephone base station 1a antenna 2 PHS public network base station 2a antenna 3 wireless communication device 4a, 4b,..., 4n according to the present invention PHS mobile device 5, 6a, 6b,. Mobile station section 32 PHS fixed station section 31a Antenna 31b Demultiplexer 31c Control section 31d Transmitter 31e Control section 32a Control section 32b Multiplex section 32c Transmitting section 32d Receiving section 32e Antenna switch 32f Antenna 320 Switching connection section 320a Switch group 320b Adder 323 Audio encoding unit 324 Deframe unit 325 Demultiplexing unit 326 Audio encoding unit 327 Frame assembling unit 328 Transmission multiplexing unit RS received audio signal TS transmitted audio signal RC reception control signal TC transmission control signal

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Keisuke Oharaki, Inventor, 1-4-10 Irifune, Chuo-ku, Tokyo Tokyo Electric Power Company System Research Laboratory (56) References JP-A-4-335723 (JP, A) JP-A-6-326779 (JP, A) JP-A-4-345217 (JP, A)

Claims (2)

(57) [Claims] 1. Wireless communication with an automobile / mobile phone system
And car, mobile phones mobile local having a function of a plurality of the PHS terminal and the communication and the PHS fixed local possible, with the automobile and cellular phone mobile local and the PHS fixed local
The car / cell phone for mutual transmission of signals between
A connection line connected to the mobile station and the PHS fixed station;
A wireless communication device provided with a mobile device configuration, wherein the mobile / mobile phone mobile station unit includes the mobile / mobile device.
The first for transmitting and receiving wireless communication waves with the telephone system
Antenna and a duplexer connected to the first antenna
And a first receiving unit for receiving a receiving-side output of the duplexer.
A first transmitter connected to the transmitting side of the duplexer;
Receiving the receiving side control information from the first receiver,
Control signal for car / cell phone system to one transmitter
And further, the plurality of PHS fixed offices
Mutual transmission of control signals for communication with PHS terminals
And a mobile / mobile phone mobile station control unit that performs communication with the plurality of PHS terminals.
A second antenna for transmitting and receiving line communication waves;
Antenna switch connected to the second antenna and the antenna
A second receiver for receiving the receiver output of the switch
And a second transmission connected to the transmission side of the antenna switch.
And TDD control and time division multiple access for time division separation
Control, exchange control, and conference call control for
Multiplexing unit, and the multiplexing unit and the mobile / mobile phone mobile station system.
PHS fixed for mutual transmission of the control signal with the control unit
A mobile station / mobile phone mobile station from a first receiver.
1 is transmitted to the multiplexing unit via the connection line.
And the conference call control of the multiplexing unit or the
A multiplexed transmission signal is formed based on the switching control and the TDMA control.
And the multiplexed reception signal from the second receiver is input to the second transmitter .
Of the TDD control and the conference call control or the exchange control
As a second audio signal output via the connection line
The control signal input to the first transmitter of the mobile / mobile phone mobile station unit and transmitted from the mobile / mobile phone mobile station control unit
Is transmitted to the PHS fixed station controller via the connection line.
Number of control signals for PHS terminals, and the control signal from the PHS fixed station control unit is
Via the line to the car / mobile phone mobile station controller
・ Transferred as control signals for mobile phone systems
The plurality of PHS terminals and the car / mobile phone system
Conference call connection between the PHS terminals and the plurality of PHS terminals.
Conference call connection or individual exchange call connection between
Each of a number of PHS terminals and the car / mobile phone system
Communication with the system is performed through the multiplexing unit.
Wireless communication device configured to: 2. The multiplexing unit of the PHS fixed local unit, For the TDD control, the signal from the second receiver
A demultiplexing unit for demultiplexing the multiplexed received signal;
From the output of the demultiplexing unit, each channel reception signal and the PH
And a reception control signal as a control signal to the S fixed station control unit.
A deframe / decoding unit for separation, For each of the conference call control and the exchange control,
Channel reception signal and a first audio signal from the first receiver.
Output of the second audio signal from the signal output to the first transmitter.
Power and transmission signals for each channel for the plurality of PHS terminals
An exchange connection for extracting For the TDMA control, each channel transmission signal and
A transmission control signal as a control signal for the plurality of PHS terminals
Encoding and frame that constitute a multiplexing frame
The second transmitter by using the multiplexing frame.
A multiplexing unit for extracting the multiplexed transmission signal to The wireless communication device according to claim 1, further comprising:
Place.