JPH10285203A - Radio lan system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To connect data terminals accommodated in the LAN system to a public line by using a portable telephone system that sends/receives radio data communicated between a base station connecting to the public line and a portable communication terminal without wired-cable connection between the LAN system and the public line. SOLUTION: Data terminals are connected to the radio LAN system A via a LAN 17. Upon the receipt of radio data from a base station connecting to a public line by a radio reception means 11, a LAN transmission control means 16 analyzes the received radio data and allows a LAN transmission means 14 to send the data to a corresponding data terminal via the LAN 17. Upon the receipt of data from a data terminal via the LAN 17 by a LAN reception means 1, a radio transmission control means 15 analyzes the received data and allows a radio transmission means 12 to send data to be sent to the public line to the base station connecting to the public line as radio data.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a LAN device for connecting a data terminal accommodated in a LAN to a public line.
In particular, by using a mobile phone system for transmitting and receiving wireless data between a base station connected to a public line and a mobile communication terminal, and transmitting and receiving wireless data between the base station and a LAN device, The present invention relates to a wireless LAN device for connecting a data terminal accommodated in a public line to the public line.

[0002]

2. Description of the Related Art LAN (Local Area Network)
Is known as a network that connects data terminals such as computers and their peripheral devices via lines. For example, a plurality of data terminals are accommodated in one LAN system via a cable, and data communication using a LAN is performed between the data terminals accommodated in one LAN system. In such a LAN system, the connection between the LAN and a public line (a line used by the public) is established by connecting a cable to the LAN.
2. Description of the Related Art Data is communicated between a data terminal in an AN system and another data terminal located outside via a public line via a public line. One configuration example of such a LAN system is shown in FIG.

FIG. 1 shows a LAN 24 installed indoors, for example, in an office or a general home. This LAN 24 includes a plurality of data terminals D1 to D4 such as a personal computer (PC) and a printer. Is housed. In the interior shown in the figure, a modem 31 is installed at a position several meters away from the indoor wall W, for example, and the public line 21 drawn from outside is connected to a telephone 32 via the modem 31. It is connected. Also, LA
Each of the data terminals D1 to D4 accommodated in N24
4, the LAN adapter 33 is connected to the modem 31 via a wired cable 34 having a length of about several meters.

Here, the above-mentioned modem 31 is connected to a telephone 32
And a switch for connecting either one of the LAN adapter 33 and the public line 21 to the public line 21, and has a function of converting analog data into digital data and a function of converting digital data into analog data. That is, in general, analog data is transmitted in the public line 21 and digital data is processed in the data terminals D1 to D4. Therefore, the analog / digital conversion processing of the data and the data Has been performed. With the above configuration, each of the data terminals D1 to D4 accommodated in the LAN 24 is connected to the public line 21 via the wired cable 34, and thereby each of the data terminals D1 to D4 located indoors is connected to the outdoor line via the public line. Is communicated via a public line 21 with another data terminal located in the Internet.

Further, a personal handy phone system (PH) used as a simple type portable telephone system is used.
In S), a line between a PHS terminal and a public line is connected using a base station that transmits and receives wireless data to and from a portable communication terminal (PHS terminal). Here, the base station includes, for example, a home base station installed in an office or a general home, an outdoor base station installed outdoors for the public, and the like. For example, when a home base station is used, a home base station is installed in the above-described office or the like,
A public line is connected to this home base station. Then, by transmitting and receiving radio data between the home base station and the PHS terminal, the PHS terminal is transmitted via the home base station.
2. Description of the Related Art A line between a terminal and a public line is connected. One home base station can accommodate a plurality of PHS terminals.

[0006]

However, in the LAN adapter in the LAN system described above,
L to connect the data terminal housed in
Since the AN adapter and the public line are connected via a wired cable, for example, when it is necessary to move the LAN once installed, it is necessary to change the arrangement of the above-mentioned wired cable. Therefore, LA once installed
There was a problem that the layout of N could not be easily changed.

In the above-mentioned LAN adapter, it is necessary to connect a place where a public line is drawn and a place where a LAN is installed via a wired cable.
For example, when these places are far apart, long cables are required, which adds to the cost of the cables,
From such a point, the LAN is installed near the place where the public line is drawn, for example, when the public line is drawn on the wall of the room, the LAN setting place is limited to the vicinity of this wall. There was a problem that was limited to.

In the above LAN adapter, LA
Since the line between the N system and the public line is connected via a wired cable, one LAN system occupies one public line. Therefore, a plurality of LAN systems are connected to the public line. In such a case, there is a problem that the same number of public lines as these LAN systems must be drawn indoors.

The present invention has been made to solve such a conventional problem. When a data terminal accommodated in a LAN is connected to a public line, the LAN device and the public line are connected by a wired cable. LAN without connecting
It is an object of the present invention to provide a wireless LAN device that can connect a line between a data terminal accommodated in a public telephone line and a public line. More specifically, by using a base station of a portable telephone system such as the above-mentioned PHS home base station and connecting a line between a wireless LAN device and a public line via this base station, Even if the LAN device and the public line are not connected using a wired cable, LA
An object of the present invention is to provide a wireless LAN device that can connect a line between a data terminal accommodated in N and a public line.

[0010]

In order to achieve the above object, a wireless LAN device according to the present invention includes a portable telephone system for transmitting and receiving wireless data between a base station connected to a public line and a portable communication terminal. By utilizing, the data terminal accommodated in the LAN is connected to the public line as follows. Here, it is assumed that a data terminal is connected to the wireless LAN device via the LAN. For example, it is assumed that a base station connected to a public line and the wireless LAN device are installed in the same room.

In the wireless LAN device, when the wireless receiving means receives the wireless data from the base station, the LAN transmission control means analyzes the received wireless data and sends the data addressed to itself to the corresponding data terminal to the LAN transmitting means. Causes transmission via LAN. That is, the destination of the wireless data received from the base station is analyzed by the LAN transmission control means, and if the data terminal which is the destination of this data is accommodated in the LAN connected to its own wireless LAN device, The transmission control means sends the data to the data terminal corresponding to this destination.
The transmission is performed via the LAN by the AN transmission means.

In the wireless LAN device, when the LAN receiving means receives data from the data terminal via the LAN, the wireless transmission control means analyzes the received data, and
The data to be transmitted to the public line is transmitted to the base station as wireless data by wireless transmission means. That is, the destination of the data received from the data terminal via the LAN is analyzed by the wireless transmission control means. If the destination to which the data is to be transmitted is a public line, the wireless transmission control means transmits the data to the base station. To wireless data by wireless transmission means. Therefore, in the wireless LAN device according to the present invention, the data to be transmitted to the public line transmitted from the data terminal via the LAN is transmitted as wireless data to the base station, and the wireless terminal transmitted from the base station and addressed to itself. Since the data is transmitted to the corresponding data terminal via the LAN, the wireless L
The line between the data terminal accommodated in the LAN and the public line can be connected without connecting the AN device and the public line using a wired cable.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment according to the present invention will be described with reference to the drawings. FIG. 1 shows a configuration example of a wireless LAN device A according to the present invention. The wireless LAN device A includes a wireless communication unit 1 for transmitting and receiving wireless data, and a LAN for transmitting and receiving data via a LAN. A communication unit 2 and a communication control unit 3 that controls the wireless communication unit 1 and the LAN communication unit 2 are provided. It is also assumed that a LAN 17 is connected to the wireless LAN device A shown in FIG. In this example, the wireless LAN device A is used as a LAN adapter that connects a data terminal accommodated in the LAN 17 to a public line. The wireless communication unit 1 includes an antenna T. The wireless communication unit 1 includes a wireless reception unit 11 that receives wireless data and a wireless transmission unit 12 that transmits wireless data. .

The wireless receiving means 11 is means for receiving wireless data transmitted from the base station of the portable telephone system used in the present invention, such as a demodulator for demodulating the wireless data received from the antenna T. Consists of
In this example, PH is used as a base station of the mobile phone system.
The home base station of S is used, and the above-mentioned wireless receiving means 11 is configured as a means for receiving the wireless data transmitted from this home base station. Wireless transmission means 12
Is means for transmitting data to be transmitted as wireless data that can be received by the base station of the mobile phone system used in the present invention. For example, the data is modulated into wireless data and transmitted from the antenna T described above. It consists of a modulator and the like. In this example, the wireless transmission unit 12 is configured as a unit that transmits data to be transmitted as wireless data that can be received by a PHS home base station.

The LAN communication unit 2 has LAN receiving means 13 for receiving data via the LAN 17 and L
LAN transmission means 14 for transmitting data via the AN 17 is provided. Here, the LAN receiving means 13 includes, for example, a demodulator for demodulating data transmitted via the LAN 17, and the LAN transmitting means 14 modulates data, for example, and transmits the data via the LAN 17. It consists of a container and the like. The communication control unit 3 includes a wireless transmission control unit 15 for controlling a wireless data transmission process by the wireless transmission unit 12 and a LAN transmission control unit 1 for controlling a data transmission process by the LAN transmission unit 14.
6 are provided. In this example, a case will be described in which the communication control unit 3 is configured as a hardware circuit including a CPU, a memory, and the like.

The wireless transmission control means 15 analyzes the data received by the LAN receiving means 13 via the LAN 17 and wirelessly transmits the data to be transmitted to the public line to the base station of the portable telephone system used in the present invention. This is means for transmitting data as wireless data by means of T.12. That is, the wireless transmission control means 15 analyzes the destination of the data received by the LAN receiving means 13 and, when the destination to which the data is to be transmitted is a public line, uses this data in the present invention. Wireless transmission means 12 to base station of mobile phone system
Means for transmitting as wireless data. In addition,
As described above, in this example, the home base station of the PHS is used as the base station of the mobile phone system.

In this embodiment, the data received by the LAN receiving means 13 via the LAN 17, ie, the LA
It is assumed that the data transmitted from the data terminal accommodated in N17 to the wireless LAN device A is added with address data indicating a destination to which the data is to be transmitted. The destination of the data is detected by analyzing the added address data, and it is determined whether the destination to which the data is to be transmitted is a public line. Further, in this example, the above-described wireless transmission control means 15 is configured such that the CPU expands the control program stored in the ROM into the RAM and executes the above processing.

The LAN transmission control means 16 analyzes the wireless data received by the wireless receiving means 11 from the base station of the portable telephone system used in the present invention, and transmits the data addressed to itself to the corresponding data terminal. LA by 14
This is means for transmitting via N17. That is, the LAN transmission control means 16 analyzes the destination of the wireless data received from the base station of the mobile phone system used in the present invention, and connects the data terminal to which this data is to be transmitted to its own wireless LAN device A. In the case where the data is accommodated in the designated LAN 17, the data is transmitted to the corresponding data terminal by the LAN transmitting means 14 via the LAN 17. As described above, in this example, the home base station of the PHS is used as the base station of the mobile phone system.

In this example, the wireless data transmitted from the home base station to the wireless LAN device A, that is, the data transmitted to the data terminal accommodated in the LAN 17 via the public line is It is assumed that address data indicating a destination to which data is to be transmitted is added, and the destination of each data terminal accommodated in the LAN 17 connected to the own wireless LAN device A is stored in the LAN transmission control means 16 described above. It is assumed that the memory is provided. Thereby, the LAN transmission control means 16 described above
A data terminal to transmit the data by analyzing address data added to the wireless data received from the home base station and determining whether the destination of the analyzed wireless data is stored in the memory; Is contained in the LAN 17 connected to the own wireless LAN device A. As a result of this determination, the data terminal to which the received data is to be transmitted is transmitted to its own wireless LA.
When it is confirmed that the data is not accommodated in the LAN 17 connected to the device A, the data once received is sent back to the transmission source by the wireless transmission means 12 via the home base station. In this example, the LAN transmission control means 16
Means that the CPU executes the control program stored in the ROM
It is configured by executing the above processing by developing the program into M.

The communication control unit 3 has a function of relaying data communication performed between data terminals accommodated in the same LAN 17, that is, a function of controlling data communication performed in the LAN 17. Is provided. Next, FIG. 2 shows a configuration example where a plurality of LAN systems are accommodated in the same home base station using the wireless LAN device A having the above configuration. In the figure,
For example, a PHS home base station 22 installed indoors, such as in an office or a general home, is shown. A public line 21 is connected to the home base station 22.

Here, at the PHS home base station 22,
Generally, wireless data transmission / reception processing is performed by a digital method.
1 has a function of converting the analog data received from 1 into digital data and transmitting it as wireless data, and a function of converting the digital data received as wireless data into analog data and transmitting it to the public line 21. .

A LAN 24 having a configuration similar to that of the conventional example shown in FIG. 4 is installed in the room shown in FIG. 4. The LAN 24 has a plurality of data such as a personal computer and a printer. Terminals D1 to D4
Is housed. In addition, these data terminals D1 to D1
4 is connected via a LAN 24 to a wireless LAN device A1 having the same configuration as that of the wireless LAN device A shown in FIG. 1, and one data terminal D1 to D4, one LAN 24 and one wireless LAN device A1. The system is configured. In this example, the public line 21 and the L
Since the AN 24 and the data terminals D1 to D4 have the same configurations as those of the conventional example shown in FIG.
In FIG. 2, these are indicated using the same reference numerals as those shown in FIG. Similarly, the indoor wall W is indicated using the same reference numerals as those in FIG.

In the room shown in FIG.
As in the AN system, a plurality of LAN systems each including a data terminal, a LAN, and the wireless LAN device A shown in FIG. 1 are installed. In this example, in order to identify each of the plurality of wireless LAN devices A having the same configuration, each wireless LAN device is indicated using a symbol such as “A1”, “A2”,. Similarly, the antennas provided in each of the wireless LAN devices A1, A2,... Are indicated by using symbols such as “T1”, “T2”,. FIG. 2 shows the LAN system including the wireless LAN device A1, the LAN 25 accommodating a plurality of data terminals (not shown), and the wireless LAN connected to the LAN 25 among the plurality of LAN systems. L
Only the LAN system composed of the AN device A2 is shown.

Here, the wireless LAN devices A1, A2,... Provided in each LAN system described above are accommodated in the home base station 22 (service area), that is, the wireless LAN devices A1, A2,.・ And home base station 2
It is assumed that the wireless communication device is installed in an area where wireless data can be transmitted / received to / from the wireless communication device. In addition, a PHS terminal 23 that transmits and receives wireless data to and from the home base station 22 is shown indoors shown in FIG. As described above, in this example,
One home base station 22 and a plurality of LAN systems (a LAN system configured by the wireless LAN device A1, a LAN system configured by the wireless LAN device A2,
..) And the PHS terminal 23, a line between each of the wireless LAN devices A1, A2,...

FIG. 3 shows an example of a line connection process performed by each of the wireless LAN devices A1, A2,... Each wireless LAN device A1, A2,.
Are the same, so only the wireless LAN device A1 will be described below. First, wireless LA
The N device A1 waits until the wireless receiving unit 11 receives wireless data from the home base station 22 or the LAN receiving unit 13 receives data from the data terminal via the LAN (step S1).

When data is received by the wireless receiving means 11 or the LAN receiving means 13, the wireless L
The AN device A1 analyzes the received data and detects the transfer destination (destination) of the data analyzed from the address data added to the data (step S2). Note that this analysis process is performed by the wireless reception unit 11 as described above.
The wireless data received by the LAN transmission control means 16 is performed by the LAN transmission control means 16, and the data received by the LAN reception means 13 is performed by the wireless transmission control means 15
Done by

Here, for example, from the data terminal D1 to the LAN
24 is determined to be data to be transmitted to the public line 21 (step S
3) The wireless LAN device A1 transmits this data to the home base station 22 as wireless data as follows.
That is, the wireless LAN device A1 first performs TEL (link connection) to the data transfer destination via the home base station 22 (step S4), and subsequently transmits the data to be transmitted to the home base station 22 as wireless data. (Step S
5). Here, the data transmitted to the home base station 22 is transmitted to the destination of the data via the public line 21, and the wireless LAN device A1 transmits the data to be transmitted to the home base station 22 as wireless data. When the communication is completed, the wireless line to the home base station 22 is cut off (link disconnection).
(Step S6).

For example, when wireless data transmitted from the home base station 22 to any one of the LAN systems is received by the wireless LAN device A1 (step S3), the wireless LAN device A1 first receives the wireless data. It is determined whether the destination of the received wireless data is any of the data terminals D1 to D4 accommodated in the LAN 24 connected to the own wireless LAN device A1 (step S7), and the data addressed to the own LAN system is determined. Transmits this data to the corresponding data terminal via the LAN 24 as follows.

That is, if the received wireless data is addressed to, for example, the data terminal D2, the wireless LAN device A1 first establishes a line with the data terminal D2 to which the data is to be transmitted. Is specified (step S8), and the data to be transmitted is transmitted to the data terminal D2 via the LAN 24 (step S9). When the data transmission process is completed, the line to the data terminal D2 is cut off (link disconnected) (step S10). In this way,
Data is transmitted from the wireless LAN device A1 to the data terminal D2 via the LAN 24.

If the destination of the wireless data received by the wireless LAN device A1 is not a data terminal accommodated in the own LAN system (step S7),
The wireless LAN device A1 discards the received wireless data (step S11). As described above, the wireless L
The line connection processing is performed by the AN device A1, and the wireless LAN device A provided in another LAN system such as the wireless LAN device A2 is also used for the wireless LAN device A.
The same processing as that of the device A1 is performed. Therefore, in the present invention, when a data terminal accommodated in a LAN is connected to a public line, a portable telephone system such as the above-mentioned PHS home base station is used, and the wireless LAN device and the public line are connected via the base station. Is connected wirelessly, so a wireless LAN
The data terminal accommodated in the LAN can be connected to the public line without connecting the device and the public line.

Further, according to the present invention, there is no need to connect the wireless LAN device and the public line using a wired cable, so that the cost for this cable can be eliminated.
Further, even when the LAN once installed is moved, it is not necessary to change the arrangement of the cables as in the related art, so that the layout of the LAN can be easily changed. Further, according to the present invention, as long as the wireless data can be transmitted and received between the wireless LAN device and the base station, the LAN can be installed in any location.
Can be arbitrarily moved.

In the above embodiment, the communication control unit 3 having a processor, a memory, and the like executes the control program to control the wireless communication unit 1 and the LAN communication unit 2 so that the communication between the wireless LAN device In the present invention, the processing for controlling the line connection with the public line is controlled. However, in the present invention, each functional means for executing the processing may be configured as an independent hardware circuit. The present invention also relates to a floppy disk or a CD-ROM storing the control program.
The processing according to the present invention can be performed by inputting the processing program into the computer from the storage medium and causing the processor to execute the processing program.

In the above embodiment, the wireless LAN device stores the destination of each data terminal accommodated in the LAN connected to the wireless LAN device, and stores the destination added to the wireless data received from the home base station 22. (Address data) is analyzed to determine whether or not the wireless data is data addressed to itself. However, the method of this determination is arbitrary. For example, the home base station 22 detects the destination of the data transmitted via the public line 21, specifies the LAN system (wireless LAN device) to which the data is to be transmitted, and specifies the specified LAN system (wireless LAN device). LAN device)
(For example, in the above embodiment, “A1”, “A
2 ”,...) May be added to the data and transmitted as wireless data. That is, in this case, the wireless LAN device adds the wireless data received from the home base station 22. By detecting the above-described identifier, it is possible to determine whether the data is data addressed to itself.

Further, in the above embodiment, an example in which a home base station and a plurality of LANs are provided in one indoor space has been described, but, for example, a home base station is installed between offices. By sharing one home base station with a plurality of LANs installed in each of the offices, the connection between the LAN installed in each office and the public line is provided by one home base station. You can do it too.

In addition, data communication between different LAN systems, such as data communication between a LAN system constituted by the wireless LAN device A1 and a LAN system constituted by the wireless LAN device A2, for example. Can also. Similarly, for example, as in the above-described embodiment, PH
When the home base station of S is used, data communication can be performed between the LAN system and the PHS terminal 23. Here, data communication performed between different LAN systems and data communication performed between the LAN system and the PHS terminal are performed, for example, using the home base station 22 as a relay device. Each P
This is performed directly without using the home base station 22 by a transceiver function or the like provided for each HS terminal.

As described above, when the PHS home base station is used as the portable telephone system as in the above embodiment, the data communication performed between the LAN systems or between the LAN system and the PHS terminal uses the public line. Since the communication is performed without any intervention, the cost of data communication between such LAN systems can be reduced. Further, when a PHS home base station is used in the present invention, one home base station (that is, one public line) can be shared by a plurality of LAN systems as shown in the above embodiment. Therefore, even when a plurality of LAN systems are provided, it is not always necessary to draw the same number of public lines. In addition, even when a new LAN system is added to the home base station, there is no need to connect a new LAN system to the home base station via a wired cable. Can be expanded.

When a PHS home base station is used in the present invention, as described above, the home base station generally has a function of converting data from analog to digital and a function of converting data from digital to analog. Therefore, the home base station can be used as a modem without having a modem as shown in FIG. As described above, according to the present invention, P
When the home base station of the HS is used, one home base station is connected to the LAN system and the PHS while maintaining the simplicity and low cost of the existing system PHS.
By sharing the terminal with the terminal, a system in which the data communication function of the LAN system and the communication function of the PHS terminal are integrated can be constructed.

By using a base unit of a parent-child telephone such as a digital cordless phone as a base station, it is possible to obtain the same effect as that obtained by using the home base station of the PHS. In the above embodiment,
The case where the PHS home base station is installed indoors and used as the mobile phone system used in the present invention has been described. In the present invention, for example, a base station installed outdoors such as an outdoor base station installed for the public is used. You can also use stations.

[0039]

As described above, according to the wireless LAN device of the present invention, when a data terminal accommodated in a LAN is connected to a public line, a connection between the base station connected to the public line and the portable communication terminal is established. A data terminal accommodated in a LAN is connected to a public line by transmitting and receiving wireless data between the base station and the wireless LAN device according to the present invention using a mobile phone system for transmitting and receiving wireless data between the base station and the base station. With this configuration, the data terminal accommodated in the LAN can be connected to the public line without connecting the wireless LAN device and the public line with a wired cable.

Further, according to the wireless LAN device of the present invention, there is no need to connect the wireless LAN device to the public line using a wired cable, so that the cost for this cable can be eliminated. Installed LAN
Even if the user moves the LAN, the layout of the LAN can be easily changed because there is no cable. Further, according to the wireless LAN device according to the present invention, the location of the LAN can be freely set as long as the wireless data can be transmitted and received between the wireless LAN device and the base station. Can be moved arbitrarily.

[Brief description of the drawings]

FIG. 1 is a configuration example of a wireless LAN device according to an embodiment of the present invention.

FIG. 2 is a diagram for explaining connection with a public line by the wireless LAN device of the present invention.

FIG. 3 is an example of a line connection process by the wireless LAN device of the present invention.

FIG. 4 is a diagram for explaining connection with a public line using a conventional LAN adapter.

[Explanation of symbols]

1. wireless communication section, 2. LAN communication section, 3. communication control section, 11 wireless receiving section, 12 wireless transmitting section, 13 LAN receiving section, 14 LAN transmitting section, 15 ..Wireless transmission control means, 16 LAN
Transmission control means, 17 LAN, 21 public line, 22 home base station, 23 PHS terminal,
24..LAN, 25..LAN, A, A1, A2.
· Wireless LAN device, W · · · Wall, T, T1, T2 · · · Antenna, D1, D2, D3, D4 · · · Data terminal,

──────────────────────────────────────────────────の Continuation of the front page (51) Int.Cl. ⁶ Identification symbol FI H04L 29/10 (72) Inventor Kenichiro Takishiro 3-14-20 Higashinakano, Nakano-ku, Tokyo Inside Kokusai Electric Corporation

Claims (1)

[Claims] 1. A wireless LAN for connecting a data terminal housed in a LAN to a public line using a mobile telephone system for transmitting and receiving wireless data between a base station connected to the public line and a mobile communication terminal. An apparatus, comprising: wireless receiving means for receiving wireless data from a base station; and a LAN for receiving data from a data terminal via a LAN.
Receiving means; wireless transmitting means for transmitting wireless data to the base station; and LAN for transmitting data to the data terminal via the LAN
Transmitting means, analyzing the wireless data received by the wireless receiving means, transmitting data to the corresponding data terminal to the corresponding LAN terminal, transmitting the data to the LAN transmitting means, and analyzing the data received by the LAN receiving means Wireless transmission control means for transmitting data to be transmitted to a public line to a base station as wireless data by wireless transmission means.