JPH0683124B2 - Wireless system - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a private wireless system, and more particularly to a private wireless system for performing wireless communication in a private area.

[Conventional technology]

Various terminals have been introduced into the office, and as the processing performed there has become complicated, the wiring work for those terminals has become complicated, and if the layout is changed, a considerable construction cost is required.

Particularly in recent years, the connection between terminals tends to become more complicated due to the widespread use of local area networks. Therefore, the labor required for wiring, the cost, and the increase in the construction cost due to the layout change will increase in the future. Is expected.

Therefore, it is considered to develop a system that makes it possible to move a terminal used in a premises such as an office by introducing a radio and facilitate layout change.

That is, in order to reduce the complicated wiring as described above, to effectively use the office, etc., and to easily change the layout, it is considered to make the communication between the terminal and the host computer and the communication between the terminals wireless. For this reason, the LARN (Local Area Rad)
The io Network) Research and Study Committee has been organized, and in March 1985, the "Investigation and Research Report on the Wireless Local Network" was issued.

[Problems to be solved by the invention]

However, if the communication between the host and the terminal or the host and the host is wireless as in the conventional case, the effect of wireless communication is small. The reason is as follows. First, in a computer-to-computer communication such as a host-to-terminal communication, a communication protocol must be provided in order to increase the reliability of transmitted data. This has the drawback that the hardware of the radio becomes complicated.

In addition, several different systems have already been introduced in the wired system, so when introducing a wireless protocol different from these, it is necessary to prepare software and hardware that can handle it in the terminal as well. is there.

Moreover, the services that can be provided by the in-house wireless system obtained through such efforts are the same as the services that have already been realized by the wired system, and the services that can be provided are substantially out of the existing range. No, it has little freshness.

When introducing a local wireless system, if a new service can be provided at a low price while coexisting with a conventional wired system, the effect of wireless can be further enhanced.

An object of the present invention is to provide a local area radio system that satisfies such a condition.

[Means for solving problems]

The present invention relates to a local area wireless system for wirelessly communicating on a local area, with a wireless input device for transmitting an input signal input by a user's operation as a wireless signal matched to a channel of a terminal to be connected. A wireless display that receives a display signal from a terminal that should be a wireless signal by selecting a channel, the wireless display and a wireless input device, and a plurality of terminal bodies connected to each other via a network; and the wireless input. A plurality of wireless transceivers for receiving a signal from the device, transmitting the signal to the terminal body, and transmitting a signal from the terminal body to the wireless display.

[Action]

According to the present invention, in the case of introducing an OA device or the like, it is possible to arrange only what should be kept at the user's hand, and place other things at places other than the user's hand. That is, in the present invention, a local wireless system is provided in which only the input device and the display are kept in the user's hand, and the other devices are collectively placed in an appropriate place somewhere, for example, a computer room or the like, and exchange between them by wireless communication. It In this case, a plurality of terminals can be freely used by providing the input device and the display with the channel selection function. Further, in this case, it is not necessary to change the wireless communication system for each terminal, and it is also possible to provide a new service such as a plurality of users sharing the same display screen.

〔Example〕

 Next, the present invention will be described with reference to the drawings.

FIG. 1 shows an embodiment of the present invention. As shown in FIG. 1, the local wireless system includes wireless displays 10 and 11.
And wireless keyboards 20 and 21 as wireless input devices, wireless transceivers 30 and 31, and terminal bodies 40 to 42 including CPUs.

The wireless keyboards 20 and 21 are keyboards for inputting input signals to the terminals by wireless signals, and the wireless displays 10 and 11 are display devices that receive signals for display as wireless signals and perform display. These are kept in the hands of the users who use them. On the other hand, the terminal bodies 40 to 42 including the CPU are not connected to the display or keyboard by wires as in the conventional wired type, and are arranged at appropriate places other than the user's hand.

In the present embodiment, there are three CPUs, and Ethernet 70
It is assumed that they are connected with.

Wireless transceivers 30 and 31 are connected to the terminal bodies 40 and 42, respectively.
A disk device 60 is connected to the terminal main body 42. The wireless transceivers 30 and 31 demodulate the signals from the wireless keyboard and transmit them to the respective terminal bodies 40 and 42,
Also, the display signals from the respective terminal bodies 40, 42 are modulated and sent to the wireless display. The transmitting and receiving parties are the wireless display 10 and the wireless keyboard 20 in the case of the wireless transceiver 30, and the wireless display 11 and the wireless keyboard 21 in the case of the wireless transceiver 31, but this combination is performed by changing the channel as described later. It can be changed.

Wireless keyboard thus keyboard or display
20, 21 and wireless displays 10, 11 are based on the following reasons.

As office automation equipment increases in offices, offices are filled with machines. One advantage of on-premises communication is that only those devices that need to be organized and really in the hands of the user should be placed in the office, other things should be placed outside the user's hands, for example directly from the user. It is in a place where it can be placed in an invisible place. Considering what should be kept at the user's hand, it is an input / output device, and the CPU, fixed disk, etc. do not necessarily have to be placed in the office, and are always at hand compared to the input / output device. It turns out that it doesn't have to be. From this point of view, as shown in FIG. 1, the keyboards and displays are the wireless keyboards 20 and 21, and the wireless displays 10 and 11, and the communication is performed via the wireless transceivers 30 and 31.

As described above, in the system according to the present embodiment, in the indoor wireless system that facilitates the movement of the terminal by performing wireless communication in the indoor area, the wireless keyboard 20 for inputting the input signal from the user to the terminal by the wireless signal, 21, wireless display 10,11 that receives a signal from the terminal body as a wireless signal, and the signal from the wireless keyboard 20,21 is demodulated and transmitted to the terminal body, and from the terminal body to the wireless display 10,11. Radio transceivers 30 and 31 for modulating signals,
It is composed of terminals that communicate with the wireless displays 10 and 11 and the wireless keyboards 20 and 21.

In the system of FIG. 1, wireless displays 10 and 11
Receives and displays signals from radio transceivers 30 and 31, respectively. The signals from the wireless keyboards 20 and 21 are received by the wireless transceivers 30 and 31, respectively, and sent to the CPU of the terminal body 40 and the CPU of the terminal body 42, respectively.

By constructing the system in this way, users using the wireless display 10 and the wireless keyboard 20 can
Even if the CPU is not at hand, the CPU of the terminal body 40 can be used without difficulty. Similarly, a user using the wireless display 11 and the wireless keyboard 21 is
CPU can be used. Further, if the printer 50 is connected to the CPU of the terminal body 40 as in the case shown in the figure, the user using the wireless keyboard 21 can output from the CPU of the terminal body 40 via the Ethernet 70. You can The disk device 60 connected to the CPU of the terminal body 42 can be used in the same manner from the wireless keyboard 20.

Furthermore, since the terminal body, the display and the keyboard are not physically connected, the connection relationship can be freely changed. In the example of FIG. 1, the transceiver is used in the wireless display 10 by changing the channel of the receiver.
It can also receive signals from 31. Wireless keyboard
If the channel is changed so that 20 is also connected to the wireless transceiver 31, the CPU of the terminal main body 42 can be used without the Ethernet 70, and thus the disk device 60 can also be used. In addition, the same screen can be shared between the wireless display 10 and the wireless display 11, and a game or a conference can be held. Therefore, this system can add a new service to the local data communication system.

As described above, in this embodiment, it is possible to place only the keyboard and the display at the user's hand, place the others at appropriate places, and exchange them by wireless communication. Moreover, since the keyboard and display can be used for any type of terminal, there is no need to change the wireless communication system to support the terminal, and moreover, a new service is provided in which multiple users share the same display screen. You can also

In this embodiment, any communication method may be used between the wireless displays 10 and 11 and the wireless transceivers 30 and 31, or between the wireless keyboards 20 and 21 and the wireless transceivers 30 and 31. The easiest is probably the analog FM method. In such a case, the analog display signal from the CPU is FM-modulated by the wireless transceivers 30 and 31 and transmitted. The wireless displays 10 and 11 can receive and display this signal if they have an FM receiver similar to a television receiver. Since the signals from the wireless keyboards 20 and 21 are slow in speed, a commercially available modem used for transmitting data on the premises may be used.

〔The invention's effect〕

As described above, according to the present invention, by using the wireless display and the wireless input device, it is possible to provide the in-house wireless system that can easily deal with the layout change without bringing unnecessary electronic devices into the office or the like. it can. In this way, the terminals can be put together in one place, and can be easily connected to each other via a local area network such as Ethernet.
Moreover, there is no need to change the wireless communication system to support terminals,
Further, the connection relationship between the terminal body and the display or input device can be freely changed, and a new service can be provided to the local data communication system.

[Brief description of drawings]

 FIG. 1 is a diagram showing an embodiment of the present invention. 10,11 ...... Wireless display 20,21 ...... Wireless keyboard 30,31 ...... Wireless transceiver 40-42 ...... Terminal body 50 ...... Printer 60 ...... Disk device 70 ...... Ethernet

Claims (2)

[Claims] A wireless input device for transmitting an input signal input by a user's operation as a wireless signal matched with a channel of a terminal to be connected, in a indoor wireless system for performing wireless communication in a local area, and receiving A wireless display that receives a display signal from a terminal to be received as a wireless signal by selecting a channel, performs communication with the wireless display and a wireless input device,
A plurality of terminal main bodies connected to each other via a network, and a plurality of wireless transceivers for receiving signals from the wireless input device and transmitting the signals to the terminal main body, and transmitting signals from the terminal main body to the wireless display. Characteristic wireless system in the premises. 2. The indoor radio system according to claim 1, wherein the wireless input device is a wireless keyboard that inputs an input signal from a user to the terminal body by a wireless signal. Wireless system.