JPH09200862A - Mobile data communication device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent the portability of a mobile station terminal and a data terminal from being lowered by constituting the mobile station terminal so as to execute data access to the data terminal through a receiving circuit and a transmitting circuit. SOLUTION: A mobile station terminal 100 is connected to a base station 10 through a radio wave and the base station 10 is connected to a public telephone network 30 through an exchange 20. A transmitting voice signal is transmitted/received among the terminal 100, the station 10 and the network 30. In the case of accessing data from a data terminal 200, the terminal 200 is connected to the terminal 100 through an infrared-ray interface. Connection relation between the terminal 100 and the network 30 is similar to the connection between the terminals 200, 100. Since data access can be attained without connecting the terminal 200 to another equipment through a cord or the like, the portability of the data terminal 200 and the mobile station terminal 100 can be prevented from being reduced.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mobile data communication device.

[0002]

2. Description of the Related Art In the field of mobile communication, various wireless communication devices such as car phones and digital cordless phones have been put into practical use. Moreover, recently, the transmission (communication) of voice signals is rapidly shifting from analog transmission to digital transmission. Furthermore, with the digitization of transmission,
Communication of non-voice signals is gradually being put to practical use for the general public.

A data terminal such as a notebook personal computer (notebook type personal computer) is connected to a PH
There are cases where a public telephone network is accessed through a mobile station terminal such as an S terminal (digital cordless telephone).

FIG. 3 shows some connection methods in such a case. That is, FIG. 3A shows the data terminal 200.
However, through the data communication unit 300, the mobile station terminal 10
This is the case when connected to 0. Here, the communication unit 30
When the mobile station terminal 100 sees the mobile station terminal 100 from the data terminal 200, it is equivalent to a modem, or the mobile station terminal 100 transmits and receives digital data in a packet state, so that the packet processing is dealt with. , Or processing for error correction.

Further, FIG. 3B shows a data unit 300.
Is a PC card (PCMCIA card), which is inserted into the PC card slot 201 of the data terminal 200.

Further, FIG. 3C shows that the mobile station terminal 100
The communication unit 300 is built in, and the mobile station terminal 100 is installed in the PC card slot 201 of the data terminal 200.
When plugged into.

[0007]

As shown in FIG. 3, three methods are conceivable for connecting the data terminal 200 to the mobile station terminal 100, and the method of FIG. 3A has been put to practical use.

However, in the case of FIG. 3A, three devices 2
Since 00, 300, and 100 must be connected to each other by a dedicated cord, there is a problem that they cannot be used immediately when desired. In addition, since the devices are connected by the connection cord during use, even if the devices 200 and 100 are notebook computers, PHS terminals, etc. and have excellent portability and convenience, these characteristics are impaired. I will end up.

Further, in the case of FIG. 3B, the adapter card 300 for data communication must be purchased.
Moreover, since the card 300 and the mobile station terminal 100 are still connected by the connection cord, there is the same problem as in the case of FIG. 3A.

In the case of FIG. 3C, the mobile station terminal 10
Since 0 must have a shape and structure suitable for the PC card slot 201 of the data terminal 200, the usability becomes poor when used for a call. Furthermore, during data communication, part of the mobile station terminal 100 enters the PC card slot 201 of the data terminal 200, so it is necessary to consider the EMC received from the data terminal 200.

Moreover, since a high frequency output for mobile communication generally requires relatively large power, the mobile station terminal 10
0 with a built-in battery, PC card slot 20
It is difficult to reduce the size to a size suitable for 1.

The present invention is intended to solve the above problems.

[0013]

According to the present invention, a mobile station has a mobile station terminal having a wireless receiving circuit and a transmitting circuit, and is configured to access data with a data terminal through the receiving circuit and the transmitting circuit. This is a data communication device.

[0014]

FIG. 1 shows the overall configuration of a mobile data communication device according to the present invention.

That is, at the time of a call, the mobile station terminal 100
However, the base station 10 is connected via radio waves to the public telephone network 30 through the exchange 20.

Therefore, at the time of a call, a voice signal for transmission is transmitted from the mobile station terminal 100 to the base station 10 by radio waves and sent from the base station 10 to the public telephone network 30. Further, a voice signal from the public telephone network 30 is transmitted from the base station 10 to the mobile station terminal 100 by radio waves and received.

Further, when the data terminal 200 accesses data, the data terminal 200 and the mobile station terminal 100 are connected via the infrared interface. The mobile station terminal 100 is connected to the base station 20 via radio waves, and the base station 20 is connected to the public telephone network 30 via the exchange 30.

Therefore, the digital data of the data terminal 200 is sent to the mobile station terminal 100 by infrared rays, further sent from the mobile station terminal 100 to the base station 10 by radio waves, and sent to the public telephone network 30.

Digital data from the public telephone network 30 is sent from the base station 10 to the mobile station terminal 100 by radio waves, and is further sent from the mobile station terminal 100 to the data terminal 200 by infrared rays.

FIG. 2 shows an embodiment in which the mobile station terminal 100 is a PHS terminal, and the circuits 111 to 116 are reception systems and 1
21 to 126 are transmission systems.

During a call, the base station or PH
The transmission signal from the S master unit is received by the transmission / reception antenna 101, the received signal is supplied to the reception circuit 111 through the antenna duplexer 102, the intermediate frequency signal of the target signal is extracted, and this signal is demodulated circuit. It is supplied to 112 and the packet signal is extracted.

Further, the packet signal is supplied to the transmission path decoding circuit 113 for error correction, and the error-corrected signal is supplied to the audio decoding circuit 114 to be a digital audio signal on the original time axis. , This signal is D / A
The analog signal is supplied to the converter circuit 115 and is converted into an original analog audio signal, and this signal is supplied to the handset 116.

The voice signal from the transmitter 121 is A
The signal is supplied to the D / D converter circuit 122 and converted into a digital audio signal, this signal is supplied to the audio encoding circuit 123 and packetized, and this packet signal is supplied to the transmission path encoding circuit 124 to encode for error correction. Processing is performed.

Then, this encoded signal is supplied to the modulation circuit 125 to be a QPSK signal for transmission, and this signal is supplied to the antenna 101 through the transmission amplifier 126 and the antenna duplexer 102, and is transmitted to the base station or the PHS master. Sent to the machine.

Further, a microcomputer 105 is provided for system control, and an LED 106 for displaying an operating state or the like on the microcomputer 105.
And the keypad 107 for various operations are connected.
Further, each circuit is controlled by the microcomputer 105, and the receiving circuit 111 and the transmitting circuit 12 are controlled.
PLL synthesizer circuit 1 for supplying local oscillation signal to 6
08 is controlled.

In the present invention, a receiving circuit 130 and a transmitting circuit 140 of the infrared communication system are further provided for such a PHS terminal 100. Then, as described above, the data terminal 200 is connected to the PHS terminal 100 and further to the public telephone network 30 through the receiving circuit 130 and the transmitting circuit 140.

That is, when the PHS terminal 100 is connected to the base station or the PHS master unit and data from the public telephone network 30 is transmitted from the base station or the PHS master unit, a call is made. The data packet is extracted from the demodulation circuit 112 in the same manner as.

Then, the data packet is supplied to the transmission path decoding circuit 131 for error correction, and the error-corrected data is supplied to the reception side transmission control circuit 132 to be a signal according to the IrDA standard. This signal is supplied to the infrared LED 134 through the infrared interface driver circuit 133 to be converted into infrared light, and this infrared light is transmitted to the data terminal 200.

Further, the infrared rays from the data terminal 200 are
While being received by the light receiving element 141, the received light signal is supplied to the infrared interface receiver circuit 142 and an IrDA standard signal is extracted. Then, this signal is supplied to the transmission-side transmission control circuit 143 for packetization, and this packet data is transmitted to the transmission coding circuit 144.
Is supplied to the modulation circuit 125, and is then supplied to the modulation circuit 125, and thereafter, is transmitted to the base station or the PHS master unit in the same manner as in the case of a telephone call.

In this case, the reception side transmission control circuit 13
2 and the transmission-side transmission control circuit 143 cooperate with each other to execute synchronization, error correction, transmission control procedure, and the like.

In this way, the data terminal 200 is connected to the public telephone network 30 through the PHS terminal 100 to access data. In this case, the data terminal 200,
Since the PHS terminal 100 is connected via infrared rays, as shown in FIGS. 3A and 3B, it can be used immediately when desired, as compared with the case where a connection cord is used.

Also, since there is no connection cord during use,
The portability and convenience of the PHS terminal 100 and the data terminal 200 are not impaired. Furthermore, during data communication, PH
The S terminal 100 is not affected by the EMC from the data terminal 200. Further, it is not necessary to purchase the data communication compatible adapter card 300.

Further, since the PHS terminal 100 can have a shape and structure suitable for a telephone call, the usability during a telephone call does not deteriorate. In addition, when used for data communication, the PHS terminal 100 near the data terminal 200.
Data terminal 200 and P.
The HS terminal 100 can be freely arranged.

In the above description, the mobile station terminal 100
Is a PHS terminal, but may be a mobile phone, a transceiver, or the like, and the data terminal 200 may be a PDA or the like, such as an electronic notebook. Furthermore, in the above description, the data line between the data terminal 200 and the mobile station terminal 100 is connected by infrared rays, but radio waves may be used as long as they are wireless.

[0035]

According to the present invention, the data terminal can be used immediately when desired, as compared with the case where the data terminal is connected to the mobile station terminal by the connection cord. In addition, since the connection cord is not used even during use, the portability and convenience of the mobile station terminal and the data terminal are not impaired. Further, during data communication, the mobile station terminal is not affected by the EMC from the data terminal.

Further, there is no need to purchase a data communication compatible adapter card. Further, since the mobile station terminal can have a shape and a structure suitable for a call, the usability during a call does not deteriorate. Further, when used for data communication, it is only necessary to place the mobile station terminal near the data terminal, so that the mobile station terminal and the data terminal can be freely arranged.

[Brief description of drawings]

FIG. 1 is a system diagram showing one embodiment of the present invention.

FIG. 2 is a system diagram showing one embodiment of the present invention.

FIG. 3 is a connection diagram for explaining the present invention.

[Explanation of symbols]

 100 mobile station terminal 101 transmitting / receiving antenna 111 receiving circuit 112 demodulating circuit 113 transmission path decoding circuit (for voice signal) 114 voice decoding circuit 115 D / A converter circuit 116 receiver 121 transmitter 120 A / D converter circuit 123 voice encoding circuit 124 Transmission path coding circuit (for audio signal) 125 Modulation circuit 126 Transmission amplifier 130 Reception circuit 131 Transmission path decoding circuit (for data) 132 Reception side transmission control circuit 133 Infrared interface driver circuit 134 Infrared LED 140 Transmission circuit 141 Infrared light receiving element 142 Infrared ray Interface receiver circuit 143 Transmission side transmission control circuit 144 Transmission line coding circuit (for data) 200 Data terminal

Claims (4)

[Claims] 1. A mobile data communication apparatus in which a mobile station terminal has a wireless receiving circuit and a transmitting circuit, and accesses data with a data terminal through the receiving circuit and the transmitting circuit. 2. The mobile data communication apparatus according to claim 1, wherein the mobile station terminal is a PHS terminal, and the data is accessed to a public telephone network through the PHS terminal. apparatus. 3. The mobile data communication device according to claim 2, wherein the receiving circuit and the transmitting circuit are infrared receiving and transmitting circuits. 4. The mobile data communication device according to claim 3, wherein the infrared reception circuit and the infrared transmission circuit access infrared light according to the IrDA standard.