JPH03268553A - Full duplex personal computer communication system through radio telephone set - Google Patents

Abstract

PURPOSE:To easily attain opposite full duplex communication even in a place having no wired telephone network by arranging a portable radio telephone set on the side of a portable personal computer, converting an input signal from the 1st MODEM for modulating/democulating data to a radio signal and radiating the radio signal to space through a terminal antenna. CONSTITUTION:Digital data such as characters outgoing transmitted from the portable personal computer 1 is modulated to an analog signal of 300 to 2400bps by the MODEM 1a and the analog signal is modulated to a radio frequency signal of 800MHz band and radiated from the terminal antenna 5a to space. A base station antenna 6a receives the radio frequency signal of 800MHz and sends the received signal to a fixed type radio telephoneset 6, which demodulates the received signal into a analog signal of 300 to 2400bps and outputs the analong signal to a wired telephone network exchange 2 through a wired telephone line 4. The exchange 2 selects one of the 1st personal computer/host 3-1 to the nth personal computer/host 3-n as a prescribed destination to be communicated and receives the input data concerned through corresponding MODEM out of plural MODEMS 3a-1 to 3a-n.

Description

[Detailed Description of the Invention] [Summary] Regarding a full-duplex personal computer communication system using a portable personal computer, the purpose of this invention is to enable full-duplex personal computer communication using wireless communication even in places where there is no wired telephone network. A portable personal computer having a first modem unit that performs modulation and demodulation, a wired telephone network exchange, and a plurality of personal computers/hosts each having one of the second modem units that performs data modulation and demodulation, A portable type that radiates into space a radio signal modulated by an input signal from the first modulation/demodulation section through a terminal antenna, and demodulates a received signal from the terminal antenna and sends it to the first modulation/demodulation section. a wireless power packer, receiving the wireless signal and sending the demodulated signal to the wired telephone network exchange;
and a fixed wireless telephone that emits a wireless signal modulated by the input signal from the wired telephone network exchange into space via a base station antenna, and a full-duplex communication between the portable computer and the plurality of computers/hosts is provided. To configure communication so that it can be performed from any point.

[Industrial application field]

The present invention relates to a full-duplex personal computer communication system using a portable personal computer.

[Conventional technology]

FIG. 3 is a diagram showing the configuration of a conventional embodiment, which is a system that enables full-duplex simultaneous communication at the digital data level. In the figure, 1 is a portable personal computer, and 1a is a first modulation/demodulation unit (hereinafter referred to as a modem) that modulates and demodulates transmitted and received data, and is integrated with the portable personal computer 1. Further, 1b is a connection jack provided in the second modem 1a. Note that 2 is a wired telephone network exchange, and 3-1 to 3-n are, for example, a fixed structure first personal computer/host computer (hereinafter referred to as host) and an nth personal computer/host;
Furthermore, 3a-1 to 3a-n are the first personal computers/hosts 3-
A second modem is integrated with the first and nth personal computers/hosts 3-n, and 4 is a wired telephone line.

The PC full-duplex communication system shown in Figure 3 is becoming popular throughout the country as a simple communication method. Communication between the portable personal computer 1 and the first personal computer/host 3-1 to the nth personal computer/host 3-n, which are the opposite communication destinations, is performed as follows.

For upstream transmission of digital data such as characters from the portable personal computer 1, the digital data is sent to the modem 1a at
0 bits per second (bps), 1200bps, or 2
Modulate to an analog signal at any speed of 400 bps,
The signal passes through a connection jack 1b provided on the modem 1a for connection to the wired telephone line 4, is placed on the wired telephone line 4, and is transmitted to the wired telephone network exchange 2. Then, the wired telephone network exchange 2 receives and receives the analog signal via the wired telephone vA4, and receives the analog signal from the first PC/host 3-1 to the opposite communication destination.
One of the n-th personal computers/hosts 3-n is selected and sequentially switched, and the switching output is sent to the wired telephone line 4. Then, the analog signal from the wired telephone line 4 is converted into a digital signal by each modem 3a-1 to 3a-n, and then sent to the fixed type first personal computer/host 3-1 to the n-th personal computer at the opposite communication destination. /Sent to host 3-n.

Conversely, the downlink transmission of digital data from the first personal computer/host 3-1 to the n-th personal computer/host 3-n to the portable personal computer 1 is performed through the reverse path.

That is, digital data from the first personal computer/host 3-1 to the nth personal computer/host 3-n is transferred to the modem 3a.
-1 to 3a-n, the signal is converted into an analog signal through the wired telephone line 4, the wired telephone network exchange 2, the wired telephone line 4, and the connection jack 1b, and then reaches the modem 1a, where it is demodulated into a digital signal. and is sent to the portable computer 1.

As mentioned above, communication between the portable computer 1 and the first computer/host 1-3-] to the n-th computer/host 3-n is performed by full-duplex communication, and therefore the wired telephone line 4 The method is to connect by inserting it into the connection jack 1b of the modem 1a.

[Problem to be solved by the invention]

Therefore, there is a problem that communication is not possible from a place without a wired telephone line, that is, from any arbitrary point.

An object of the present invention is to enable arbitrary two-way full-duplex communication even in places where there is no wired telephone network.

[Means to solve the problem]

The present invention comprises a portable personal computer 1 having a first modem 1a that modulates and demodulates data, a wired telephone network exchange 2, and one of second modems 3a-1 to 3a-n that modulates and demodulates data. Multiple computers/hosts 3-1 to 3-n with
The radio signal modulated by the input signal from the first modem 1a is radiated into space via the terminal antenna 5a, and the received signal from the terminal antenna 5a is demodulated to transmit the radio signal to the first modem 1a. A portable radio telephone 5 transmits to one modem 1a, and a radio signal that receives and demodulates the radio signal, sends it to the wired telephone network exchange 2, and modulates the signal with the input signal from the wired telephone network exchange 2. A fixed wireless telephone 6 that radiates into space via a base station antenna 6a.
so that full-duplex communication between the portable personal computer 1 and the plurality of personal computers/hosts 3-1 to 3-n can be performed from any location using the portable wireless telephone 5. It consists of

[For production]

In the present invention, in the configuration shown in FIG. 1, a portable wireless telephone 5 is provided on the portable personal computer 1 side, and an input signal from a first modem 1a that modulates and demodulates data is converted into a wireless signal and a terminal antenna 5a is used. and demodulates the received signal from the terminal antenna 5a to the modem 1a.
A fixed wireless telephone 6 is provided on the wired telephone network exchange 2 side to receive the radio signal from the terminal antenna 5a and send the demodulated signal to the wired telephone network exchange 2. A wireless signal obtained by modulating the input signal from the wired telephone network exchange 2 is radiated into space via the base station antenna 6a.

Therefore, full-duplex communication between the portable personal computer 1 and the plurality of personal computers/hosts 3-1 to 3-n is performed via wireless transmission and reception, and full-duplex personal computer communication can be performed from any location. can.

〔Example〕

FIG. 1 is a diagram showing the configuration of the present invention, which is a portable personal computer communication system using a car telephone network or the like. In the figure,
1 and 18.2.3-1 to 3-n and 3a-1 to 3a-n
has the same structure as that of the conventional example shown in FIG. 3; 1 is a portable personal computer, 1a is the first modem on the portable personal computer J side, and 2 is a wired telephone network switch. Further, 3-1 to 3-n are the first personal computer/host, the n-th personal computer/host,
A-1 to 3a-n are second modems on the side of the first personal computer/host 3-1 to the nth personal computer/host l-3-n, and 4 is a wired telephone line.

Note that 5 and 5a and 6 and 6a are constituent parts of the present invention,
Reference numeral 5 indicates a portable radio telephone set on the side of the personal computer 1, and reference numeral 5a indicates a terminal antenna connected to the portable radio telephone 5. In addition, 6 is a fixed wireless telephone installed on the wired telephone network exchange 2 side;
6a is a base station antenna connected to the wired telephone network exchange 2;

In FIG. 1, upstream transmission of digital data such as characters from the portable personal computer 1 is first performed using the modem 1a at 300 to 300.
The signal is modulated into a 2400 bps analog signal, and the analog signal is modulated into a radio frequency signal in the 800 MHz band by the portable radio telephone 5 and radiated into space through the terminal antenna 5a. Then, the base station antenna 6a receives the radio frequency signal in the 800 MHz band, sends it to the fixed wireless telephone 6, demodulates it into an analog signal of 300 to 2400 bps in the fixed wireless telephone 6, and the analog signal is transmitted to the wired telephone line 4. It is input to the wired telephone network exchange 2 via. Note that the wired telephone network exchange 2 selects the first PC/host 3-1 to the n-th PC/host 3-n as predetermined opposite communication destinations, and transmits the input data to the respective modems 3a-1 to 3a-n. T-Uke is taken through n.

Conversely, the downlink transmission of digital data from the first personal computer/host 3-1 to the n-th personal computer/host 3-n to the portable personal computer 1 is performed through the reverse path to that described above. That is, the respective digital data from the first personal computer/post 3-1 to the nth personal computer/host 3-n are sent to the modems 300 to 2400b by the modems 3a-1 to 3a-n.
It is modulated into a PS analog signal and sent to the wired telephone network exchange 2 through the wired telephone line 4, and is sent to the wired telephone network exchange 2 from the first personal computer/boss 3-1 to the nth personal computer/host 3-n. Data from a predetermined personal computer/host is input to the fixed wireless telephone 6 via the wired telephone line 4.

The fixed wireless telephone 6 modulates the signal into a 900 MHz band radio frequency signal and radiates it into space through the base station antenna 6a. Note that the terminal antenna 5a receives the radio frequency signal in the 900 MHz band and sends it to the portable wireless telephone 5.
The signal is demodulated into an analog signal of 300 to 2400 bps and sent to the modem 1a, and further demodulated into a digital signal by the modem 1a and sent to the portable personal computer 1.

As mentioned above, the wired telephone line 4 can be used by taking advantage of the fact that the portable wireless telephone 5 that uses a car telephone network etc. is full duplex in its wireless communication format and performs audio frequency propagation communication. Instead, the modem 1a of the portable personal computer 1 is connected to the portable wireless telephone 5 to realize full-duplex wireless personal computer communication from any location. Note that the communication destination may be either wired or wireless.

FIG. 2 is a diagram showing the configuration of an embodiment of the present invention, and particularly shows the modem 1a in detail. In the figure, the portable personal computer 1, modem 1a, and portable wireless telephone 5 are the same as in FIG. 1 above. Note that 11 to 20 and 21a to 21c are circuits provided inside the modem 1a, 11 is a full-duplex modem control section, 12a is a first amplifier, 12b is a second amplifier, 13 is a transformer, and 14 is a polarity Detection unit, 515a and S
15b is a switch contact, 16 is an incoming call detection section, and 17 is an arrester. Further, 18 is an audio amplifier, and 19 is a loudspeaker. Note that Za is a first impedance, zb is a second impedance, 20 is a wireless connection detection unit, 21a, 21c
21b is an earphone jack on the modem 1a side, and similarly, 21b is a ground jack on the modem 1a side. Furthermore, 51a and 5
1c is an earphone jack on the side of the portable radio telephone 5, and 51b on the side of the portable radio telephone @5 is a ground jack.

In the case of wired telephone communication in FIG.
It is converted into an 8PS analog signal and sent to the polarity detection unit 14 via the second amplifier 12b and the transformer 13 for transformation. At this time, the incoming call detection unit 16 detects the wired telephone network exchange 2 (
(not shown), the switch contact 515a closes to create a path between the wired telephone network exchange 2 and the portable personal computer 1, and the data from the portable personal computer 1 is protected by lightning arrester I7. It is transmitted to the wireline telephone network switch 2 through the line side while being protected. Conversely, when the incoming call detection unit 16 detects that data has been sent from the wired telephone network exchange 2, the switch contact S15
b is closed to create a passage between the wired telephone network exchange 2 and the portable personal computer 1, and data from the wired telephone network exchange 2 is transmitted through the switch contact 515b - 1 - lance 13 - second amplifier 12b
The signal reaches the full-duplex modem control unit 11 via the route , where it is demodulated and converted into digital data,
It is received by the portable personal computer 1. Note that if the information handled by the modem 1a is data, the gate signal is sent to the audio amplifier 18.
If the information handled by the modem 1a is audio, the gate signal uses the audio amplifier 18 to intercept the audio at the loudspeaker 19.

When performing one type of wireless telephone communication, when the wireless connection detection section 20 detects the connection between the modem 1a and the wireless telephone 5, the wireless connection detection section 20 sends a detection signal to the full-duplex modem control section 11 and switches the two switches. Contact 515a and S15
Control is performed to open b, disabling transmission and reception on the line side. Therefore, the digital data from the portable personal computer 1 is modulated by the full-duplex modem control unit 11 and converted into 300 to 240
It is converted into an analog signal of 08PS and sent to the second amplifier 12b.
is sent to the first impedance Za via the first impedance Za, impedance matching is performed by the first impedance Za, and sent to the portable wireless telephone 5 via the earphone jacks 21a and 51a, where it is modulated by radio frequency. It is radiated into space from the terminal antenna 5a. Furthermore, the radio frequency signal from the terminal antenna 5a is demodulated to an audible frequency by the portable radio telephone 5, and the second impedance zb
The impedance matching was done in the second amplifier 1.
2b, the full-duplex modem control unit 11 converts the data into digital data, and sends the data to the portable personal computer l, where it is received. Note that when the information handled by the modem 1a is data, the gate signal kills the audio amplifier 18 and stops the loudspeaker 19, and when the information handled by the modem 1a is audio, the gate signal is sent to the loudspeaker 19 by making use of the audio amplifier 18. Interception of voice is the same as for data.

[Effects of the Invention] As is clear from the above description, according to the present invention, it is possible to easily construct a communication system that takes full advantage of the advantages of portable personal computers and does not require difficult communication procedures.

[Brief explanation of drawings]

FIG. 1 is a diagram showing the configuration of the present invention, FIG. 2 is a diagram showing the configuration of an embodiment of the present invention, and FIG. 3 is a diagram showing the configuration of a conventional embodiment. In the figure, 1 is a portable personal computer, 1a is a first modem unit, 2 is a wired telephone network switch, 3-1 to 3-n are first personal computers/hosts, and nth personal computers/hosts are 3a-1 to 3a. -n is a second modulation/demodulation unit, 4 is a wired telephone line, 5 is a portable radio telephone, 5a is a terminal antenna, 6 is a fixed radio telephone, and 6a is a base station antenna.

Claims (1)

[Claims] A portable personal computer (1) having a first modem unit (1a) that modulates and demodulates data, a wired telephone network switch (2),
A second modem unit (3a-1 to 3a
- multiple computers/hosts (3) with one of
-1 to 3-n), in which a wireless signal modulated by the input signal from the first modulation/demodulation section (1a) is radiated into space via a terminal antenna (5a), and the terminal A portable radio telephone (5) that demodulates a received signal from the antenna (5a) and sends it to the first modulation/demodulation section (1a).
and sending a signal obtained by receiving and demodulating the wireless signal to the wired telephone network exchange (2), and transmitting the wireless signal modulated by the input signal from the wired telephone network exchange (2) to the base station antenna (
A fixed wireless telephone (6) is provided which emits radiation into the space via the portable computer (1) and a plurality of computers/hosts (6a).
3-1 to 3-n) from any point via the portable radio telephone (5). Heavy computer communication system.