CN101453319B - USB interface wireless network card compatible with multiple security standards - Google Patents

Abstract

The invention relates to a USB interface wireless network card capable of being compatible with various safety criterions, which consists of a power supply, a USB interface, a baseband and radio-frequency module, a memory device and an antenna. The USB interface wireless network card converts 802.3 network data into 802.11 data through the USB interface and a baseband chip which can be compatible with the various safety criterions, and is communicated with other devices which accord with a 802.11 protocol through the radio-frequency module according with the 802.11 protocol and the antenna used for a WLAN, because the USB interface wireless network card is compatible with the various safety criterions such as WEP, WAP, WAPI, WPA and RSN, the USB interface wireless network card can provide a safer wireless network environment for users.

Description

The USB interface wireless network card of compatible with multiple security standards

Technical field

The present invention relates to the USB interface wireless network card equipment of compatible with multiple security standards, can support the chip of multiple safety standard, can support safety standards such as WEP, WAP, WAPI, WPA, RSN, wherein the WAPI safety standard is the safety standard of China's independent intellectual property right, the fail safe and the compatibility that can compatible with multiple security standards can further improve equipment, can make the user safer enjoy convenient that wireless network brings.

Background technology

At present, the USB interface wireless network card is a kind of very competitive wireless Internet access technology, and it can provide to get online without being tethered to a cable with the desktop computer computer and be connected for the notebook that has USB interface.As everyone knows, the mechanics of communication the most widely that adopts in wireless local area at present is that the IEEE of the U.S. or the standard of international ISO tissue formulation are encrypted, and comprises WEP, WAP, WAPI, WPA, RSN etc. than general safety standard at present.Wherein, international standard has adopted modes such as WEP, WPA, 802.11x, 802.11i, VPN to attempt to guarantee wlan security, but they otherwise just the cable LAN safety mechanism is transferred on the WLAN by technology, be easy to technically be decrypted, safety problem has become the important research direction of WLAN.The safety that appears as WLAN that China has the secure standard WAPI of independent intellectual property right provides a new solution.Because safety standard is various, make that the safety-compliant when same network interface card uses in different countries and regions becomes problem, and the USB interface wireless network card of compatible with multiple security standards can address this problem, for the user provides safer online environment.

Summary of the invention

For can compatible country variant and the safety standard in area, improve the safety issue of WLAN (wireless local area network), the invention provides the USB interface wireless network card of compatible with multiple security standards, not only can use international safety standards such as WEP, WAP, WPA, RSN to carry out communication, but also compatible China have the safer safety encipher standard WAPI of independent intellectual property right.

The present invention solves the technical scheme that its technical problem adopts: baseband chip adopt can compatible with multiple security standards baseband chip, in the wireless networking process, can adjust cipher mode according to the safety standard in the country one belongs to and area, realize safe wireless network environment more, thereby make the safer use wireless network of user.Data Control flow process of the present invention roughly is: wireless network card is at first related with the AP generation, obtains the safety standard that AP adopts; Finished 802.3 with the conversion of 802.11 data format after select corresponding safe enciphering and deciphering algorithm device in the baseband chip according to different safety standards; Be modulated into the radiofrequency signal of 2.4GHz or 5GHz again via radio-frequency module, go out by antenna transmission; The control flow of reception data in contrast.Concrete technical scheme is as follows:

In the present invention, the primary processor of system adopt can compatible with multiple security standards baseband chip, have USB interface.The safety standard of base band compatibility comprises safety standards such as WEP, WAP, WAPI, WPA, RSN, and wherein the WAPI safety standard is the safety standard of China's independent intellectual property right.

Among the present invention, the radio-frequency module of system adopt to be supported the chip of 802.11 serial protocols, comprises 802.11a, 802.11b, 802.11g etc., can only support a kind of also can support simultaneously multiple.

To be these wireless network cards be made up of the wireless radio frequency modules and the WLAN antenna of the baseband chip of compatible with multiple security standards and assembly thereof, support 802.11 serial protocols characteristics of the present invention.Its operation principle is that network signal is mutual by USB interface and baseband chip, baseband chip is converted into 802.3 wide area network datas 802.11 WLAN data, and carrying out data interaction by signal and wireless aps that radio-frequency module is modulated into 2.4GHz or 5GHz, signal adopts different safety standards via baseband chip according to the country one belongs to and area different.

The invention has the beneficial effects as follows that the notebook and the desktop computer computer that have USB interface use wireless network card of the present invention can insert WLAN easily, conveniently use wireless network.Wireless network is supported multiple safety standard simultaneously, and the WAPI standard comprising China has independent intellectual property right can provide a safe wireless network environment more for the user.System operation is simple, working stability.

Description of drawings

Fig. 1 fundamental diagram of the present invention.

Fig. 2 data flowchart of the present invention

Embodiment

The present invention is further described below in conjunction with drawings and Examples.

Concrete connected mode of the present invention:

Power supply power pack of the present invention (4) provides needed power supply for the various device on the wireless network card, the function that its is realized provides USB interface+power supply of 5V, be converted into needed various different electrical power on the network interface card, carry out concrete selection according to concrete different schemes.

Baseband chip of the present invention (2) can be connected with wide area network by USB interface, carries out transfer of data by difference IQ signal and radio frequency chip.Baseband chip is finished two groundworks: the data that 1,802.3 wide area network data are converted into 802.11 serial protocols, it is realized by the firmware program of chip, according to 802.3 agreements the useful data that will transmit is extracted from 802.3 Frame, according to 802.11 agreements useful data is encapsulated then; 2, the hardware algorithm of the desired safety standard of data based communication of 802.11 agreements by chip carried out encryption and decryption work, because selected for use can compatible with multiple security standards baseband chip (the encryption and decryption work of data all is to be finished by the hardware in the chip), by the association of communicating by letter, base band can obtain the safety standard that radio communication adopted of current country, just can finish the work of encryption and decryption to the data of 802.11 agreements via relevant hardware algorithm device in the baseband chip, thereby realize switching safety standard.

Memory device of the present invention (3) adopts the place as the embedded software storage, can require to select suitable memory device according to the interface of baseband chip and the size and the speed of service of firmware program, such as EEPROM.

Radio frequency chip of the present invention (5) needs to support 802.11 serial protocols, and it is responsible for the baseband signal modulation that meets 802.11 serial protocols is become the radiofrequency signal of 2.4GHz or 5GHz, and radio-frequency (RF) switch is connected to antenna (6).

Antenna (6) can be selected shaft-like, pottery or microstrip antenna according to applied environment and other considerations, can support one or two of 2.4GHz and 5GHz channel kind.

PC (PC) or notebook (STA) use the wireless network card of USB interface of the present invention to be connected to wireless aps by wireless medium (by safer encryption standard WAPI), and then access of radio network, realize the function of getting online without being tethered to a cable.

Claims (1)

1. the USB interface wireless network card of compatible with multiple security standards, compatible with multiple security standards, comprise WEP, WAP, WAPI, WPA, RSN, it is characterized in that described USB interface wireless network card is made up of power supply, USB interface, base band and radio-frequency module, memory device and antenna; Wherein:

Described base band is selected the chip that can support multiple safety standard for use, can support WEP, WAP, WAPI, WPA, RSN safety standard; Base band is connected with wide area network by USB interface, carry out transfer of data by difference IQ signal and radio-frequency module, wide area network data 802.3 is converted into the data of 802.11 serial protocols, the hardware algorithm of desired safety standard by base band carries out encryption and decryption work according to communicating by letter, and it is related by communication, obtain the safety standard that radio communication adopted of current country, the data of 802.11 agreements are finished the work of encryption and decryption via relevant hardware algorithm device in the base band, realize switching safety standard;

Described radio-frequency module is supported 802.11 serial protocols, comprises 802.11a, 802.11b, 802.11g, can only support a kind ofly also can support multiple 802.11 serial protocols simultaneously; The baseband signal that meets 802.11 serial protocols is modulated the radiofrequency signal that becomes 2.4GHz or 5GHz, and radio-frequency (RF) switch is connected to antenna;

Described antenna is used for wlan device, supports in 2.4GHz and the 5GHz channel one or two, selects flagpole antenna, ceramic antenna or microstrip antenna according to applied environment;

Described USB interface is as the approach that message transmission is arrived host computer;

Described memory device requires to select suitable memory device as the place of embedded software storage according to the interface of baseband chip and the size and the speed of service of firmware program;

Described power supply provides needed power supply for the various device on the wireless network card, USB interface provide+power supply of 5V, be converted into needed various different electrical power on the network interface card.

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