KR20070012901A - Wireless communication apparatus and national communication radio-frequency protocol sellecting method using thereof - Google Patents

Abstract

A wireless communication device and a method for selecting the propagation standard according to each country by using the same are provided to enable a user to select an optimum propagation standard in order to use wireless communication, by using a wireless communication unit in which each propagation standard are set according to countries and areas and stored. When a user selects a desired country in a mobile terminal, a controller of the mobile terminal reads communication information of the desired country stored in a storage unit(S301). The controller reads a designated address including PDA(Production Data Area) data including propagation standard of the desired country from the first address(S302). The controller reads the stored propagation standard starting from the designated address and detects it(S303). The controller sets a function of a MAC processing unit for processing a data link and functions of each element of the mobile terminal according to the detected propagation standard information(S304). The controller completes wireless connection for wireless communication(S305). The mobile terminal performs wireless communication(S306).

Description

Wireless communication apparatus and national radio standard selection method using the same {Wireless Communication apparatus and national communication radio-frequency protocol sellecting method using

1 is a block diagram showing the basic configuration of a wireless communication device.

2 is a flowchart illustrating a process of inputting a country-specific radio wave standard into a wireless communication device according to the present invention.

3 is a flowchart illustrating a method of selecting and using a country-specific radio standard stored in a wireless communication device according to the present invention.

* Explanation of symbols for main parts of drawings *

31: wireless transceiver 32: baseband processing unit

33: MAC processing unit 34: storage unit

The present invention relates to a radio wave standard selection method for each country using a wireless communication device, and more particularly, to a radio wave standard selection method for freely selecting and using radio wave standards defined differently for each country stored in the radio communication device.

In general, a wireless local area network (WLAN) refers to a LAN that wirelessly transmits and receives data between a computer and a computer or between a computer and other communication devices by using radio frequency (RF) or infrared rays. This wireless LAN has been developed in recent years due to the rapid development of Internet service and wireless communication technology. Especially, it is easy to install and maintain in places where wired networks are not easy to build, such as network access in buildings, large offices and exhibition halls. Its use is exploding due to its simplicity.

The wireless LAN card installed in the wireless LAN system is an interface card for transmitting and receiving data between a plurality of computers connected to an allocated network. The wireless LAN card uses radio waves or infrared rays to transmit and receive data, thereby transmitting baseband signals through radio waves. There is a need for a physical layer.

On the other hand, among the standards of the physical layer of the WLAN, for example, 802.11 was developed by the IEEE working group, and is currently divided into four standards such as 802.11, 802.11a, 802.11b, and 802.11g. Use CSMA / CA. The 802.11b specification uses Complementary Code Keying (CCK) modulation, which provides faster data rates than 802.11 using PSK modulation, and is less susceptible to interference from multipath propagation, and operates in the 2.4 GHz band. It provides a transfer rate of 11Mbps per second. The 802.11a specification, developed from 802.11b, is applied to wireless atm systems, operates at radio frequency bandwidths of 5 GHz to 6 GHz, and can achieve data rates up to 54 Mbps using orthogonal frequency-division multiplexing (OFDM) modulation. have.

In addition, the contents adopted by each country among the frequency bands of the WLAN card recommended by IEEE 802.11 are shown in Table 1 below.

channel Center frequency USA / Canada Europe France Spain Republic of Korea One 2412 MHz ○ ○ ○ 2 2417 MHz ○ ○ ○ 3 2422 MHz ○ ○ ○ 4 2427 MHz ○ ○ ○ 5 2432 MHz ○ ○ ○ 6 2437 MHz ○ ○ ○ 7 2442 MHz ○ ○ ○ 8 2447 MHz ○ ○ ○ 9 2452 MHz ○ ○ ○ 10 2457 MHz ○ ○ ○ ○ ○ 11 2462 MHz ○ ○ ○ ○ ○ 12 2467 MHz ○ ○ ○ 13 2472 MHz ○ ○ ○ 14 2484 MHz

As shown in Table 1, the United States and Canada use the center frequencies of 2412 MHz to 2462 MHz bands, while in Europe and Korea they use most of the recommended frequency bands from 2412 MHz to 2462 MHz bands. Only the band 2457 MHz to 2472 MHz and Spain use only the band 2457 MHz to 2462 MHz.

Firmware for driving a hardware-configured WLAN card using these frequencies includes initial firmware for downloading the driver firmware to an empty flash memory during initial installation, and a firmware for initializing and updating the WLAN card. Head firmware, secondary firmware that implements a communication protocol for wireless LAN, and a PDA (Productiuon Data Area) that stores the characteristics of the wireless LAN card, which is associated with the frequency band settings allowed for use in Table 1. Information and the like are recorded.

In the related art, since the frequency bands allowed by the WLAN card are different in each country, as described above, the PDA is changed and the firmware downloaded to the WLAN card is changed according to the above, and the WLAN card is produced, managed, and sold by country. .

In addition, a wireless LAN card is connected to an access point (AP), which is a wireless access device interworking with a wired network, to be allocated a communication channel, and the AP is an ISM (Indutrial, Scientific and Medical) band region of a 2.4 GHz frequency band without a license. It can be used to configure a network of speeds of several Mbps to several tens of Mbps.

The AP follows the high-speed 802.11 standard of DSSS (Direct Sequence Spread Spectrum) because the existing AP supporting 2Mbps speed and the latest AP supporting 11Mbps speed coexist and move to high speed 11Mbps environment easily. This is because there is compatibility between different products.

In order to maximize the transmission / reception distance of the communication module provided in the wireless LAN equipment, the output of the transmission frequency should also be kept to the maximum.

This is in accordance with the Adjacent Channel Power Ratio (ACPR) specification defined in the IEEE 802.11 specification, which defines the linear characteristics of a frequency amplifier.

That is, the channel signal is basically amplified within a predetermined frequency bandwidth, but intermodulation occurs in the bandwidth of the channel signal where several frequencies are concentrated, and this phenomenon invades adjacent channel frequencies to form unnecessary energy.

For the reasons mentioned above, the frequency amplifier is limited in maximizing its output, and as the output of the frequency amplifier rises, the ACPR value also increases, so the aspect of this ACPR must be taken into account to realize the maximum output of the frequency amplifier.

Therefore, as described above, producers and sellers have a problem of separately producing, managing, and selling wireless LAN cards by country, and from a user's point of view, it is inconvenient to purchase and install wireless LAN cards for each country or region. There is this.

The present invention has been proposed in order to solve the above problems, the producer or the user can use the wireless communication by selecting the optimal radio standard in the corresponding country by using a radio communication device that stores the radio standards for each country in advance An object of the present invention is to provide a method of using a communication device.

Another object of the present invention is a wireless communication method that saves installation costs because it does not need to provide a separate wireless communication device for each country or region, since it uses a wireless communication device that sets and stores all different radio standards for each country or region. Can be provided.

In order to achieve the above object, the present invention provides a method of wirelessly communicating by setting, selecting, and executing different radio standard information for each country using a wireless communication device. A first step of designating and linking, in a storage unit, an address to store different radio standard information of a corresponding country; A second step of inputting and storing the radio wave standard information of a corresponding country when an address to which the radio wave standard information is stored is designated and linked; A third step of reading an address in which radio wave standard information of any of the countries stored in the storage unit of the wireless LAN card is stored according to a user's country selection instruction; A fourth step of reading and detecting the radio wave standard information stored in the read address; And a fifth step of wirelessly communicating by setting a radio wave standard with the WLAN card based on the detected radio wave standard information.

Hereinafter, with reference to the accompanying drawings will be described in detail a preferred embodiment of the present invention.

1 is a block diagram showing the basic configuration of a wireless communication device.

As shown in FIG. 1, the wireless communication apparatus receives and processes a radio signal from an AP and transmits and receives data transmitted from the communication terminal to the AP as a radio signal. A baseband processor 32 for demodulating data received through the AP and modulating data transmitted to the AP through the wireless transceiver 31, a channel based on a medium access control (MAC) protocol between the AP and a corresponding communication terminal. MAC processing unit 33 for performing data link processing such as securing and the like, and PDA data for storing country-specific addresses, country-specific radio specification information, and characteristics of wireless communication devices connected to the MAC processing unit 33, and the like. It consists of a storage unit 34, such as an electronically erasable programmable read only memory (EEPROM) for storing the data.

A wireless LAN card is mainly used as the wireless communication device.

When a wireless LAN card of this configuration is installed in a new communication terminal, the wireless communication device scans all channels to receive a beacon transmitted from the AP, and reads information contained in a frame of the received beacon signal. Therefore, the channel set for each AP should be set as a channel for data communication according to the read information.

In general, a plurality of APs set to different channels transmit a beacon signal, and after receiving the WLAN card, the WLAN card does not require an AP, and supports the communication between the wireless clients in an AD-hoc mode, The AP connects to a wired network and communicates in one way in an infrastructure mode that supports network formation. At this time, in the infrastructure construction mode, the network manager checks the channel set in the AP by the network manager, and in the ad hoc mode, the user selects one channel among the allowed channels for each country and uses it for communication. do.

How to set the radio standards for each country in a wireless LAN card having such a configuration and operation will be described with reference to Figure 2 and [Table 2].

2 is a flowchart illustrating a process of inputting a radio wave standard for each country into a wireless communication device according to the present invention, and [Table 2] illustrates a structure of a storage unit 34 of a WLAN card.

The producer of the WLAN card or the user of the WLAN card designates and sets a country required for a predetermined address at the beginning of the storage unit 34 of the WLAN card and an address for storing the radio wave standard of the country (S201).

Specifically, in order to store the radio wave standards of the Republic of Korea in the storage unit 34 of the wireless LAN card such as EEPROM, as shown in [Table 2], the Republic of Korea address is specified as the first address, "001000" is set by the specified link. Subsequently, the next address is designated by the United States, and is set by designating " 001011 "

Address  Data 000000   001000-South Korea 000001   001011-United States 000010   001111-Europe 000011 ㆍ 000100 ㆍ 000101 ㆍ 000110 ㆍ 000111 ㆍ 001000   PDA Data on Korean Radio Standards ㆍ ㆍ 001001 001010 001011   PDA Data on American Radio Standards 001100 001101

After the country and the address for storing the radio wave standard of the country are designated and set at the predetermined address, PDA data including the radio wave standard information of the country is input to the address for storing the radio wave standard of the country (S202).

This PDA data includes, for example, a manufacturer's unique number representing LG Innotek, a manufacturer, a serial number of a wireless communication device, a MAC address, which is an address used in Ethernet, and an interface relating to an interface of a wireless LAN card. List, frequency channels allowed in the country, and output information of the radio frequency of the country.

Among the PDA data, the output information of the wireless communication frequency of the corresponding country is optimally output of the radio wave output of each country, for example, as shown in [Table 3]. In this case, it means information capable of wireless communication with an optimal radio wave output of 8.5 dBm between the radio wave output minimum value of 7 dBm and the maximum value of 10.5 dBm, and is input to the storage unit 34 by the manufacturer in step S202.

Next, PDA data including the American radio standard information is input to the address "001011", and the radio standard information for each country is sequentially input to the storage unit 34 of the wireless LAN card and then stored (S203).

 Radio standard (baud rate) Korea radio wave output US radio wave output European radio wave output at least optimal maximum at least optimal maximum at least optimal maximum  802.11b (11 Mbps)  7 dBm  8.5 dBm  10.5 dBm  15 dBm  18.7 dBm  23 dBm  4.5 dBm  6 dBm  7.5 dBm  802.11g (54 Mbps)  7 dBm  8.5 dBm  10.5 dBm  9 dBm  12 dBm  19 dBm  4.5 dBm  6 dBm  7.5 dBm

Hereinafter, a method in which a user of a communication terminal selects a radio standard for each country and performs radio communication using the radio communication device in which radio standard information for each country is stored will be described with reference to FIG. 3.

3 is a flowchart illustrating a method of selecting and using a country-specific radio wave standard stored in a wireless communication device according to the present invention.

When a user of a communication terminal such as a laptop equipped with a wireless LAN card in which radio wave standard information is set for each country performs wireless communication overseas, the user executes wireless communication in the management menu of the communication terminal. If selected, the control unit (not shown) of the communication terminal starts reading American communication information stored in the storage unit 34 of the wireless communication device (S301).

When starting to read the communication information of the country of the United States, the control unit is a PDA containing the radio wave standard of the United States at the address ("000001") of the first portion of the wireless communication device storage unit 34 as shown in [Table 2] The designated address ("001011") into which data is input is read (S302).

After reading the designated address " 001011 ", the American radio wave standard stored in the designated address " 001011 " is read and detected (S303). At this time, if the radio communication standard of the United States is 802.11b, the control unit reads and detects radio wave information that can be transmitted and received at a radio wave output of 18.7 dBm from a designated address ("001011").

After reading and detecting the American radio standard, the control unit sets functions of the Mac processing unit 33 to perform data link processing and each component of the mobile communication terminal according to the detected American radio standard information (S304).

Specifically, the functions of the MAC processing unit 33 and each component of the communication terminal are set so that the channel of the frequency band and the optimum radio wave output of the frequency allowable according to the American radio standard are set to 18.7 dBm.

In this state, the control unit completes the wireless connection for performing the wireless communication in the state set to the channel of the frequency band allowed by the American radio standard and the optimum radio wave output of 18.7 dBm (S305).

After completing the wireless connection, the communication terminal performs wireless communication by transmitting and receiving at a radio wave output of 18.7 dBm through a channel of a frequency band allowed according to the American radio standard (S306).

In addition, if the user intends to use the wireless communication while staying in another country abroad, there is no need to purchase a separate wireless communication device, it is possible to use the wireless communication simply by selecting and setting the radio wave standards of the country as described above. Will be.

Although the technical spirit of the present invention has been described in detail according to the above-described preferred embodiment, it should be noted that the above-described embodiments are for the purpose of description and not of limitation.

In addition, those skilled in the art will understand that various implementations are possible within the scope of the technical idea of the present invention.

As described above, the present invention does not need to provide a separate wireless communication device for each country or region, so that wireless communication can be performed using a wireless communication device that sets and stores all different radio standards for each country or region. There is no need to overproduce a separate wireless communication device, and users can save costs because they do not purchase a separate wireless communication device.

Claims (5)

In a method of wirelessly communicating by setting and selectively executing different radio standard information for each country using a wireless communication device, A first step of designating and linking an address to store different radio standard information of a corresponding country in a storage unit of a wireless communication device; A second step of inputting and storing the radio wave standard information of a corresponding country when an address to which the radio wave standard information is stored is designated and linked; A third step of reading an address storing radio wave standard information of any of the countries stored in the storage unit of the WLAN card according to a country selection instruction; A fourth step of reading and detecting the radio wave standard information stored in the read address; And A fifth step of wirelessly communicating with the wireless communication apparatus by setting a radio wave standard based on the detected radio wave standard information; Wireless communication method using a wireless communication device comprising a. The method of claim 1, The radio wave standard information includes information on an optimal value of the radio wave power for each country. The method of claim 1, The storage unit of the wireless communication device is a wireless communication method using a wireless communication device, characterized in that the EEPROM (electronically erasable programmable read only memory). A program comprising the process of a wireless communication method according to claim 1. A wireless transceiver for transmitting and receiving a signal transmitted and received by an antenna as a radio signal; A baseband processor for demodulating or modulating the transmitted and received data; A MAC processing unit performing data link processing according to radio standard information of a specific country; And Is connected to the MAC processing unit, country-specific address, country-specific radio specification information, And a storage unit in which the characteristics of the wireless communication device are stored. A radio communication apparatus, characterized in that different radio standard information is set and executed for each country.

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