JPH08163646A - Radio communication device - Google Patents

Abstract

PURPOSE: To provide a convenient communication environment wherein automobile and portable telephone services are offered in addition to the communication functions of PHS by complementing the disadvantages of the automobile and portable telephone system and PHS with each other, and enabling a connection with the automobile and portable telephone system only by preparing only one PHS terminal. CONSTITUTION: This device is provided with an automobile and portable telephone mobile station part 31 and a PHS fixed station part 32, whose receiver speech signal output and transmitter input are connected; and a call signal, a dial signal, and a termination signal are transmitted between their control parts. Consequently, the speech signal and control signal of the automobile and portable telephone system can be converted into the speech signal and control signal of the PHS, and the automobile and portable telephone system can be accessed by using the PHS terminal.

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 agile communication within a relatively narrow range in a wireless communication network providing wide area service.
The present invention relates to a wireless communication device that connects a mobile device.

[0002]

2. Description of the Related Art An automobile / cellular phone network is a typical wireless communication network for providing wide area services. 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 in any of the home, the office, and the public. In PHS, the transmission output 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 one mobile device at any time from home calls to calls via public lines, and because the range of radio waves is narrow, the frequency reuse efficiency is high. Is good, and because the transmission output is small, the battery life is long. The disadvantage is that
Since the coverage area is narrow, it is necessary to install an extremely large number of base stations, and it takes a long time and a lot of money to set up a public network. Since it will worsen, you can only move at walking speed.
For the advantages and disadvantages of automobile / cell phone systems, see P above.
It can be said that it is almost the same as that of HS.

[0003]

In an environment in which wireless systems having such advantages and disadvantages coexist, when a user who uses a mobile device moves at high speed in an automobile or the like, he / she may use an automobile / mobile phone terminal within a certain area. For example, when shopping in an underground mall or the like, it is cumbersome and inconvenient to prepare and use two types of mobile devices such as PHS terminals. Further, it is possible to use the PHS as a cordless telephone, which is one of the usage forms, at the work site. For example, in road construction, electricity, and gas construction, it is conceivable that workers at the work site communicate with each other using a PHS terminal as a cordless telephone, and instructions from the center or inquiries to the center are transmitted using a car / mobile telephone terminal. Also in this case, both the car / mobile phone terminal and the PHS terminal must be carried and used properly, which is inconvenient.

An object of the present invention is to provide a PHS with a car / mobile phone system and a PHS by compensating for each other's disadvantages and enabling connection to the car / mobile phone system by preparing only one PHS terminal. It is an object of the present invention to provide a wireless communication device that can realize a convenient communication environment by adding a car / mobile phone service to the realized communication function.

[0005]

To achieve this object, a wireless communication device according to the present invention includes a first receiver and a first transmitter capable of communicating with an automobile / mobile phone system, and a dial. A car / mobile phone mobile station unit having a car / mobile phone mobile station control unit for transmitting information and receiving incoming information, a second receiver and a second transmitter capable of communicating with a PHS terminal, and TDMA -Multiplexer for TDD control and PHS for receiving dialing information and transmitting incoming call information
And a PHS fixed station section having a fixed station control section, and inputs the audio signal output of the first receiver of the automobile / mobile phone mobile station section to the second transmitter via the multiplexing section of the PHS fixed station section. Then, the audio signal output of the second receiver via the multiplexing unit of the PHS fixed local unit is input to the first transmitter of the automobile / mobile telephone mobile station unit, and the automobile / mobile telephone mobile station control unit A control signal such as an incoming call signal received and output is transmitted to the PHS fixed station control unit, and a control signal such as a calling signal or a dial signal received by the PHS fixed station unit is controlled by the car / mobile telephone mobile station control unit. By transmitting the PHS terminal to the vehicle, the PHS terminal and the automobile / mobile phone system can be connected to each other.

[0006]

The mobile / mobile phone mobile station and the PHS fixed station are provided, the receiver voice signal output and the transmitter input are connected, and the calling signal, the dial signal and the incoming signal are sent between the respective control units. By configuring to transmit, the voice signal and control signal of the car / cell phone system can be converted into the voice signal and control signal of PHS, and the car / cell phone system can be accessed using the PHS terminal. become.

[0007]

1 is a block diagram showing a form of wireless communication using a wireless communication apparatus according to the present invention. In FIG. 1, 1
Is an automobile / cell phone base station, 2 is a PHS public network base station,
3 is a wireless communication device according to the present invention, which is composed of a mobile / mobile phone mobile station 31 and a PHS fixed station 32, and 4a.
4n is a PHS mobile device. As an optimum usage mode of the wireless communication device 3 according to the present invention, the wireless communication device 3 is loaded on a passenger car or a work vehicle. At a place where the radio wave from the PHS public network base station 2 does 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 is transmitted. It connects to the automobile telephone base station 1 via the mobile telephone and accesses the automobile / mobile telephone network to perform communication. Short-distance communication such as transceiver communication is performed by extension communication via the wireless communication device 3 on the routes 6b and 6n like the PHS mobile units 4b and 4n, or in the PHS direct handset communication mode by the route 8. . For communication in an urban area, the PHS public network base station 2 is directly accessed through the route 5 like the PHS mobile device 4n without using the wireless communication device 3. In addition, one remote person and a plurality of workers around the passenger car or the work vehicle are in a meeting form in a route 7 to 6a, 6b,
Communication is performed via 6n. In such conference-type communication, for example, instructions from the center directly reach the workers during the work, so the safety of the work is ensured, and the workers on the center side can grasp the situation on the site more accurately. it can.

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

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

The antenna 31a is an input / output terminal for a modulated wave in the frequency band assigned to the automobile / mobile phone system.
The duplexer 31b is a circuit for sharing the antenna 31a for transmission and reception, and prevents the radio wave output from the transmitter 31d from sneaking into the receiver 31c. The receiver 31c tunes to a carrier of a desired frequency and detects the carrier to output a control signal such as a voice signal and a zone identification signal or an incoming call signal. The transmitter 31d modulates a voice signal together with a control signal such as a call signal, a dial signal, or a position registration signal, converts the voice signal into a desired frequency, and transmits the frequency. As shown in FIG. 3, the car / mobile phone mobile station controller 31e monitors the control signal output from the receiver 31c in the incoming call waiting state, and when the zone identification signal changes (S ₁ ), the position registration is performed. signal via the transmitter 31d to be transmitted to the automobile and mobile telephone system (S _2). When the position registration is completed, it returns to the standby state. Upon receiving an incoming call signal when the zone identification signal does not change (S _3), transmit it to the PHS base station controller 32a (S _4), if receiving a response signal from the PHS base station controller 32a ( S _5), establishes a link channel (S _6), enters the communication state. When there is no incoming call signal, the PHS fixed station control unit 32 makes an outgoing call.
Upon receiving the calling signal from a (S _7), and requests a link channel establishment to automotive and portable telephone system (S _8). Link when the 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). In addition, 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, it returns to the standby state.

The PHS fixed station controller 32a performs incoming call control, outgoing 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 Four
The incoming call signal is sent to b (S ₂₂ ), and the PHS mobile device 4 b
When the 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 device to be called is not determined in advance, all the PHS mobile devices 4a to 4 under it
An incoming signal is sent to n, and when any of the PHS mobile stations responds, a link channel is assigned to the PHS mobile station. 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 / cell phone mobile station controller 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). After that, connection control is performed between the voice signal input / output to / from the mobile / mobile phone mobile station unit 31 and the voice 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). In addition, the car / cell phone mobile station control unit 31e
From even when receiving the downlink disconnect signal to disconnect the (S ₃₃₎ a communication channel. When the communication channel is disconnected, it returns to the standby state.

In the case of a conference call, as shown in FIG. 5, a state in which one opposite communication channel is established (S ₄₁ ), for example, route 7
While the communication is started via the route 6a and the presence or absence of the conference call signal ( _S42 ), when there is the conference call signal, the other party to be called, for example, the PHS mobile station 4b and the PHS fixed station. 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 conference invitation signal, the communication channel disconnection loop is entered. PH on request
S mobile Likewise audio signal adder against 4c performs convening connected (described later 320b) to (S ₄₅₎ to the conference. In the conference call, by pressing a conference key or a number key (not shown) provided on the PHS mobile units 4a to 4c, a conference call signal is transmitted to the PHS fixed station control unit 32a and the call is started from that point. The conference call terminates by disconnecting all communication channels when the opposite communication channel is disconnected ( _S46 ). When the communication channel is disconnected, the standby state is entered.

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

FIG. 6 shows 1 when the number of PHS multiplexing is 4.
An example is shown in which channels are assigned to control channels and the remaining three channels are assigned to voice channels. In FIG. 6, an exchange connection unit 320 is a part that performs analog voice connection and addition for conference call. The exchange connection unit 320 outputs the received voice signal RS output from the receiver 31c as X0, and the three voice output units 323 output from the voice decoding unit 323. Corresponding received voice signals X1, X2, X3, a transmitted voice signal TS input to the transmitter 31d is Y0, and three transmitted voice signals input to the voice encoding unit 326 are associated with the received voice signals X1, X2, X3. Connection and addition are performed according to the following equation (1) as Y3, Y2, and Y1.

[0015]

[Equation 1] However, S01 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, and S11 is Y1.
And X1; S12, Y1 and X2; S20, Y2 and X0; S21, Y2 and X1; S22, Y2 and X1.
3, S3 is Y3 and X0, S31 is Y3 is X2.
And S32 interconnect Y3 and X3, respectively.
In the case of the conference call, all are turned on (= 1), and when the conference call is not performed, the switch at the position to be exchange-connected is turned off. Speech encoding unit 326 and speech decoding unit 3
23 performs digital-analog conversion of voice. The frame assembling section 327 is used for audio signals, frame signals or P
The transmission control signal TC of the HS fixed station control unit 32a is assembled according to the format to generate a channel signal. The deframe unit 324 removes the frame signal, passes the voice signal to the voice decoding unit 323, and passes the reception control signal RC to the PHS fixed station control unit 32a. The multiplexing unit 328 time division multiplexes the voice channel and the control channel. The demultiplexing unit 325 separates and distributes channels.

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

[0017]

As described above in detail, by using the wireless communication device according to the present invention, it is possible to carry out wireless communication in almost any situation with one type of PHS mobile device, and effective use of radio wave resources. It has the advantage that it can be used.

[Brief description of 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 flow chart 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 flow chart 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]

 1 Car Telephone Base Station 1a Antenna 2 PHS Public Network Base Station 2a Antenna 3 Wireless Communication Device 4a, 4b, ..., 4n PHS Mobile Station 5, 6a, 6b, ... 6n, 7, 8 Route 31 Car / Cellular Phone Mobile station 32 PHS fixed station 31a antenna 31b demultiplexer 31c controller 31d transmitter 31e controller 32a controller 32b multiplexer 32c transmitter 32d receiver 32e antenna switch 32f antenna 320 exchange connection 320a switch 320b adder 323 Speech coding unit 324 Deframe unit 325 Demultiplexing unit 326 Speech coding unit 327 Frame assembling unit 328 Transmission multiplexing unit RS reception voice signal TS transmission voice signal RC reception control signal TC transmission control signal

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁶ Identification code Internal reference number FI Technical indication H04Q 7/26 7/30

Claims (2)

[Claims] 1. A first receiver and a first transmitter capable of communicating with an automobile / mobile phone system, and an automobile / mobile phone mobile station controller for transmitting dial information and receiving incoming call information. A mobile / mobile phone mobile station, a second receiver and a second transmitter capable of communicating with a PHS terminal, a multiplexer for performing TDMA-TDD control, and a PHS for receiving dial information and transmitting incoming information. A fixed station control unit and a PHS fixed station unit, wherein the voice signal output of the first receiver of the automobile / mobile phone mobile station unit is transmitted to the second unit via the multiplexing unit of the PHS fixed station unit.
To the transmitter of the PHS fixed local unit, and the audio signal output of the second receiver via the multiplexing unit of the PHS fixed local unit is transmitted to the first mobile unit of the automobile / mobile phone.
Control signal such as an incoming call signal received and output by the mobile / mobile phone mobile station control unit is transmitted to the PHS fixed station control unit, and a call received by the PHS fixed station unit is transmitted. A wireless communication device configured to enable connection between the PHS terminal and the automobile / mobile phone system by transmitting a control signal such as a signal or a dial signal to the automobile / mobile phone mobile station control unit. 2. The wireless communication apparatus according to claim 1, wherein the multiplex unit is provided with a conference call function.