KR20040103276A - Apparatus of ralay AP for wireless LAN - Google Patents

Abstract

PURPOSE: A relay AP unit of a wireless LAN system is provided to enhance users' convenience by expanding a service area and reducing a shadow area without connecting a system by using a cable. CONSTITUTION: A USB(Universal Serial Bus) LAN card(310) performs wireless communication through the first channel. A relay AP LAN card(320) is connected by USB and performs wireless communication through the second channel. An antenna unit(321) transmits and receives wireless data through the second channel. A USB connector(322) connected to the USB LAN card(310) transmits and receives data. An antenna unit(311) performs wireless communication through the first channel. A wireless MAC(Media Access Control) unit(323) processes data, which the USB connector(322) has received from the USB LAN card(310), to wireless data. A BBP(Baseband Processor) unit(324) makes the processed wireless data baseband data. An RF(Radio Frequency) unit(325) changes the baseband data to RF, and the antenna unit(321) transmits the RF in the air. The second channel wireless data transmitted by the relay AP LAN card(320) is received by a wireless communication terminal such as a notebook or PDA.

Description

AP device for relaying wireless LAN system {Apparatus of ralay AP for wireless LAN}

The present invention relates to an AP device for relaying a wireless LAN system, and more particularly, to an AP device for relaying a wireless LAN system for reducing a shadow area of an WLAN system used in connection with a wired Internet service and increasing a service area.

Currently, WLAN services combined with high-speed services such as Asymmetric Digital Subscriber Line (ADSL) or Very High Datarate DSL (VDSL) are increasingly being provided to the home.

The structure of a wireless LAN system of a general home provided with a wireless LAN service combined with the high speed service is as follows.

1 is a block diagram showing the structure of a wireless LAN system configured in a conventional home.

Referring to Figure 1, the room 1 (ⓐ), room 2 (ⓑ), room 3 (ⓒ), the bathroom (ⓓ), living room (ⓔ), kitchen (ⓕ), multi-purpose room (ⓖ) and includes the porch (ⓗ) The wireless LAN system configured in a general home includes a wired modem 100, a computer 110, AP 1, 2 (120, 130), and a notebook 140.

The wired modem 100 is a modem for high-speed Internet service. When only the wired service is provided, the wired modem 100 is connected to the computer 120 to provide the Internet service to the user.

In order to receive the wireless LAN service, the wired modem 100 is connected to the AP 1 120, the AP 1 120 is wired to the computer 120, and the AP 1 120 is wirelessly connected to the notebook 140. Is connected.

AP 1, 2 (120, 130) is an Access Point (AP) to connect to the wired modem 100 to enable a wireless LAN (AP) function to transmit and receive data to and from the wired modem 100 in the air Do it.

The optimal location of the AP installed in the subscriber's home is preferably in the center of the house, such as AP 2 130, but in general, AP 2 130 is rarely installed, and only AP 1 120 is installed to provide wireless LAN service. To provide.

In addition, the notebook 140 is a wireless communication terminal for wireless data transmission and reception with the AP 1 (120), and may be replaced with a PDA, a mobile communication terminal capable of wireless LAN communication.

In the wireless LAN system of the general home having the above structure, the performance of the AP 1 120 is inversely proportional to the distance from the notebook 140 which is the wireless terminal. The shorter the distance, the better the communication state, and the farther the distance, the communication It becomes impossible.

In particular, as shown in FIG. 1, when the distance from room 1 (ⓐ) to room 2 (ⓑ) is farther away than room 3 (ⓒ), room 3 (ⓒ) becomes a shaded area, There is a problem that can not receive the wireless LAN service due to poor reception sensitivity. At this time, the greater the distance from the AP 1 (120), the higher the probability of becoming a shadow area.

Various methods have been attempted to reduce the shadow area, and there is a method of increasing the output of the AP 1 120. However, there is a limit to how to increase the output of the AP 1 (120).

Alternatively, a high gain antenna can be attached to AP 1 120, which also has a high cost problem and limitations.

Alternatively, as shown in FIG. 1, AP 2 130 may be installed in the center of a house using a cable in connection with a wired modem 100 instead of AP 1 120. .

However, the above-described method has to be connected to the AP 2 (130) by connecting a cable, so installation is cumbersome and inconvenience due to the cable, service users do not prefer this method.

In order to solve the above problems, the present invention configures a relay link wirelessly in place of the wired LAN cable by using the Ad-hoc mode, to reduce the shadow area of the wireless LAN system, the wireless area that can expand the service area It is an object of the present invention to provide an AP device for relaying a LAN system.

1 is a block diagram showing the structure of a wireless LAN system configured in a conventional home.

2 is a block diagram showing the structure of a wireless LAN system according to an embodiment of the present invention.

3 is a block diagram illustrating a structure of the detachable relay AP device of FIG. 2 according to an embodiment of the present invention.

4 is a block diagram showing the structure of the integrated relay AP device of FIG. 2 according to an embodiment of the present invention.

Relay AP device of the wireless LAN system according to a feature of the present invention,

In order to provide a wireless LAN service connected to a wired LAN system, a wireless communication unit converts data transmitted and received from the wired LAN system into wireless data of a first channel and wireless communication having a wireless LAN communication function of a second channel. A relaying AP device for relaying wireless data between terminals, comprising: a first wireless LAN card performing wireless communication of a first channel through an ad-hoc mode wireless link with the wireless communication unit; And a second wireless device connected to the first wireless LAN card to convert data transmitted and received by the first wireless LAN card through wireless communication of the first channel into wireless data of a second channel to transmit and receive data to and from the wireless communication terminal. Wireless LAN card is included.

Wireless LAN system according to a feature of the present invention,

A wireless LAN system, which is connected to a wired LAN and provides a wireless LAN service to a wireless communication terminal, comprising: a wireless communication unit converting data transmitted and received from the wired LAN into wireless data of a first channel; And a relay AP for receiving wireless data of the first channel transmitted and received by the wireless communication unit through an Ad-hoc mode wireless link, and transmitting and receiving the received wireless data to the wireless communication terminal as wireless data of a second channel. .

In this case, the relay AP may include: a first WLAN card for performing wireless communication of a first channel through a wireless link in an Ad-hoc mode with the wireless communication unit; And a second wireless device connected to the first wireless LAN card and converting data transmitted and received by the first wireless LAN card through wireless communication of the first channel into wireless data of a second channel to transmit and receive data to and from the wireless communication terminal. Wireless LAN card is included.

In particular, the first channel and the second channel is characterized by using a channel separated by more than a certain number of channels to avoid mutual interference.

The first wireless LAN card may include: a connection unit connected to the second wireless LAN card to transmit and receive data; A wireless conversion unit for converting the data received by the wire into wireless data; A baseband processor for converting the radio data converted by the radio conversion unit into a baseband signal; A radio signal unit for converting the baseband signal converted by the baseband processor unit into a radio signal; And an antenna unit for transmitting the radio signal converted by the radio signal unit to the radio communication unit through an ad-hoc mode radio link with the radio communication unit.

The second WLAN card may include: a connection unit connected to the first WLAN card to transmit and receive data by wire; A wireless conversion unit for converting the data received by the wire into wireless data; A baseband processor for converting the radio data converted by the radio conversion unit into a baseband signal; A radio signal unit for converting the baseband signal converted by the baseband processor unit into a radio signal; And an antenna unit for transmitting the radio signal converted by the radio signal unit to the radio communication terminal.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those skilled in the art may easily implement the present invention. As those skilled in the art would realize, the described embodiments may be modified in various different ways, all without departing from the spirit or scope of the present invention. In the accompanying drawings, parts irrelevant to the description of the present invention are omitted in order to clearly describe the present invention, and the same or similar parts are denoted by the same reference numerals.

2 is a block diagram illustrating a structure of a wireless LAN system according to an exemplary embodiment of the present invention.

Referring to FIG. 2, a LAN system for enabling wireless LAN service by connecting to a high speed service according to an exemplary embodiment of the present invention includes a wired modem 100a, a computer 110, a USB (Universal Serial Bus) LAN card 210, And a relay AP 220. In this case, the relay AP 220 is a detachable relay AP 220, and may be configured as an integrated relay AP 220a by using a personal computer memory card international association (PCMCIA) LAN card.

The wired modem 100a and the computer 110 are directly connected as in the case of receiving a wired service. In this case, the wired modem 100a should support a USB port for connecting the USB LAN card 210.

The USB LAN card 210 is a wireless communication unit connected to the wired modem 100a and converting data transmitted and received by the wired modem 100a into wireless data by the Ad-hoc mode. The relay AP 220 is connected to the USB LAN card 210 in an infrastructure mode so that the USB LAN card 210 receives data transmitted and received through a wireless communication from a wired modem, and converts it into another channel wireless signal. Transmit to the air

At this time, the Ad-hoc mode and the infrastructure mode are two modes that can be implemented in the WLAN card, the Ad-hoc mode is a mode configured for link configuration between the WLAN card without communication to the outside, infrastructure Mode is a mode that provides a general wireless LAN service. In this case, the Ad-hoc mode and the infrastructure mode may not be selected at the same time, and may be selected and used respectively.

That is, the wired modem 100a transmits the received data to the USB LAN card 210 through the USB port, and the USB LAN card 210 wirelessly transmits the data received from the wired modem 100a to the air through the first channel. Send. In this case, the first channel refers to a specific data channel that is arbitrarily determined.

In addition, the relay AP 220 receives the first channel wireless data transmitted by the USB LAN card 210 to the air, and transmits the second channel wireless data to the air again. For this purpose, the relay AP 220 should be able to operate in Ad-hoc mode with two LAN cards embedded therein.

The wireless data transmitted to the air through the second channel may be received by a wireless communication terminal such as a laptop, a PDA, or a mobile terminal in the home to receive a wireless LAN service.

The structure of the wireless LAN system including the wired modem 100a, the USB LAN card 210, the relay AP 220 and the integrated relay AP 220a will be described in more detail as follows.

3 is a block diagram illustrating a detailed structure of the detachable relay AP 220 of FIG. 2 according to an exemplary embodiment of the present invention.

Referring to FIG. 3, the relay AP 220 includes a USB LAN card 310 and a relay AP LAN card 320.

The USB LAN card 310 is a wireless LAN card for wireless communication through a first channel such as the USB LAN card 210 of FIG. 2, and can be replaced with a wireless LAN card of a PCMCIA type, in which case the USB LAN card 210 of FIG. 2 is used. Wireless communication of the first channel such as

The relay AP LAN card 320 performs wireless communication of a second channel with a wireless LAN card connected to the USB LAN card 310 in a USB manner, and the second channel is the same channel as a wireless communication terminal such as a laptop or a PDA. .

Therefore, since the USB LAN card 310 and the relay AP LAN card 320 have the same structure except for performing wireless communication of different channels, the structure of the relay AP LAN card 320 will be described as a representative.

The relay AP LAN card 320 may include an antenna unit 321, a USB connection unit 322, a wireless media access control (MAC) unit 323, a baseband processor (BBP) unit 324, and a radio frequency (RF) unit ( 325).

The antenna unit 321 transmits and receives wireless data through the second channel, and the USB connection unit 322 is connected to the USB LAN card 310 to transmit and receive data. In addition, the antenna unit 311 of the USB LAN card 310 performs wireless communication in the first channel.

The wireless MAC unit 323 is a wireless conversion unit for processing the data received from the USB LAN card 310 by the USB connection unit 322 into wireless data, and the BBP unit 324 basebands the processed wireless data. The RF unit 325 converts the baseband data into a radio frequency so that the antenna unit 321 can transmit the air.

The second channel wireless data transmitted by the relay AP LAN card 320 is received by a wireless communication terminal such as a notebook or a PDA to communicate.

The wireless LAN system having the above structure provides a wireless LAN service by connecting a wired modem (100a) = USB LAN card 210-USB LAN card 310 = relay AP LAN card 320-wireless communication terminal 140. . In this case, '=' means connected by a cable, '-' means wireless communication.

In addition, the USB LAN card 210 and the USB LAN card 220 of the relay AP 220 performs wireless data communication of the first channel, the relay AP LAN card 320 and the wireless communication terminal 140 Perform wireless data transmission on two channels.

In this case, the first channel and the second channel may use channels that are separated by four or more channels in order to eliminate mutual interference.

In addition, it is possible to configure the integrated relay AP 220a using the PCMCIA LAN card instead of the USB LAN card 220 according to the embodiment of the present invention as described above.

4 is a block diagram showing the structure of the integrated relay AP device of FIG. 2 according to an embodiment of the present invention.

Referring to FIG. 4, the integrated relay AP device 220a = 400 in FIG. 2 configures two PCMCIA LAN cards 410 and 420 so that two LAN cards are integrally formed without the USB connection units 312 and 322. Since the configuration of each LAN card is the same as described above with reference to FIG. 3, description thereof will be omitted.

In this case, the wireless data communication channel between the LAN card is also divided into a first channel and a second channel, and set to be separated by at least four channels to avoid interference.

Although a preferred embodiment of the present invention has been described in detail above, the present invention is not limited thereto, and various other changes and modifications are possible.

As described above, the AP device for relaying a wireless LAN system according to the present invention provides a wireless LAN system that is connected to a wired LAN system in order to minimize shadow areas according to distances and to increase service areas. By providing a relay AP capable of data communication, there is an effect of improving the convenience of the user of the WLAN service by extending the service area and reducing the shadow area without connecting the system using a cable.

Claims (6)

In order to provide a wireless LAN service connected to a wired LAN system, a wireless communication unit converts data transmitted and received from the wired LAN system into wireless data of a first channel and wireless communication having a wireless LAN communication function of a second channel. In a relay AP device for relaying wireless data between terminals, A first wireless LAN card performing wireless communication of a first channel with the wireless communication unit through an Ad-hoc mode wireless link; And A second wireless device connected to the first wireless LAN card and converting data transmitted and received by the first wireless LAN card to the wireless communication unit through wireless communication of a first channel into wireless data of a second channel to transmit and receive data to and from the wireless communication terminal; LAN card AP device for relaying a wireless LAN system comprising a. In the wireless LAN system to provide a wireless LAN service to a wireless communication terminal connected to a wired LAN, A wireless communication unit which converts data transmitted and received from the wired LAN into wireless data of a first channel and transmits and receives data; And A relay AP that receives wireless data of a first channel transmitted and received by the wireless communication unit through an Ad-hoc mode wireless link, and transmits and receives the received wireless data to the wireless communication terminal as wireless data of a second channel. WiFi system comprising a. The method of claim 2, The relay AP, A first wireless LAN card performing wireless communication of a first channel through a wireless link in an Ad-hoc mode with the wireless communication unit; And A second wireless device connected to the first wireless LAN card and converting data transmitted and received by the first wireless LAN card to the wireless communication unit through wireless communication of a first channel into wireless data of a second channel to transmit and receive data to and from the wireless communication terminal; LAN card WiFi system comprising a. The method of claim 3, wherein The first channel and the second channel is a wireless LAN system, characterized in that for using the channel away from a certain number of channels to avoid interference. The method of claim 3, wherein The first wireless LAN card, A connection unit connected to the second WLAN card to transmit and receive data; A wireless conversion unit for converting the data received by the wire into wireless data; A baseband processor for converting the radio data converted by the radio conversion unit into a baseband signal; A radio signal unit for converting the baseband signal converted by the baseband processor unit into a radio signal; And An antenna unit for transmitting the radio signal converted by the radio signal unit to the radio communication unit through an ad-hoc mode radio link with the radio communication unit WiFi system comprising a. The second wireless LAN card, A connection unit connected to the first WLAN card to transmit and receive data by wire; A wireless conversion unit for converting the data received by the wire into wireless data; A baseband processor for converting the radio data converted by the radio conversion unit into a baseband signal; A radio signal unit for converting the baseband signal converted by the baseband processor unit into a radio signal; And A wireless LAN system comprising an antenna unit for transmitting the wireless signal converted by the wireless signal unit to the wireless communication terminal.