CN1848780A

CN1848780A - Apparatus and method for automatic changingover standard

Info

Publication number: CN1848780A
Application number: CN 200510025028
Authority: CN
Inventors: 应力; 陆庆元; 范耀周; 林肇
Original assignee: HUAMAN INFORMATION TECHNOLOGY Co Ltd SHANGHAI; SHANGHAI INFORMATION SAFETY TECHNOLOGY SUPPORT CENTER Co Ltd
Current assignee: HUAMAN INFORMATION TECHNOLOGY Co Ltd SHANGHAI; SHANGHAI INFORMATION SAFETY TECHNOLOGY SUPPORT CENTER Co Ltd
Priority date: 2005-04-12
Filing date: 2005-04-12
Publication date: 2006-10-18

Abstract

A method for automatically switching over standards utilizes radio frequency module, master control module, WAPI enciphering/ deciphering module, output module, double- way connected storage module and clock control module to realize automatic selection and treatment of state standard and international standard at radio local network.

Description

The device and method that standard automaticallyes switch

Technical field

Patent of the present invention relates to the device and method that a kind of standard automaticallyes switch, relate in particular to the device and method of a kind of automatic realization WLAN (wireless local area network) national standard and international standard, relate to and a kind ofly not only met mandatory national standard (GB15629.11-2003 and GB15629.1102-2003) but also the device and method of the WLAN (wireless local area network) of the automatic selection of existing international standard, its method is applicable to all devices of wireless office net, comprises terminal, access point, router, gateway etc.

Background technology

The mobility of WLAN devices has been brought convenience on using and higher user's access rate.Sui Pen note this to popularize its application more and more wider, more and more universal, enterprise and domestic consumer will become the market of WLAN devices.WLAN (wireless local area network) obtains the favor of vast telecom operators just rapidly.

But because WLAN (wireless local area network) is to utilize aerial signal to transmit, easily intercepted and captured, existing international standard inserts carries out unilateral authentication, and cryptographic algorithm easily is cracked, and is absolutely unsafe.On November 26th, 2003 for this reason, State Administration for Quality Supervision and Inspection and Quarantine and national standardization administration committee unite the issue bulletin, announce that the mandatory national standard (GB15629.11-2003 and GB15629.1102-2003) of WLAN (wireless local area network) product came into effect from December 1st, 2003.But because China will cause the safety of WLAN (wireless local area network) to occur blank to the postponement of compulsory standard in the highest commercial negotiation of U.S.-China.In order to plug a gap the device and method that the present invention has adopted " bimodulus technology " to come the realization standard to automatically switch.

Summary of the invention

Technical problem to be solved by this invention provide a kind of can be according to on-the-spot operating position, the safety device and the method for work thereof of the switching of the optional automatic realization WLAN (wireless local area network) world of user and GB, the module of this device and GB is embedded in the WLAN devices, to ensure data transmission safety, use this device solves Pen to remember this computer roaming problem anywhere simultaneously.

In order to solve the problems of the technologies described above, the invention provides a kind of device of realizing the WLAN (wireless local area network) bimodulus, it comprises:

Interface module, with the WAPI agreement of GB and encrypting module by interface module and primary module seamless link.This patent adopts the IIC interface.

The WAPI encrypting module.Major function is to realize the WAPI agreement.

Main control module.Major function is the automatic switchover module of two kinds of standards.

Wherein, described described main control module comprises:

Primary processor, be solidificated in device top control module in the primary processor body, and be connected with the WAPI encrypting module by iic bus is two-way;

This device has following characteristics: Automatically realized existing WLAN terminal device, as the international standard of notebook and desktop computer and the compatibility of mandatory GB.Decide which kind of cipher mode of employing by user and market.

Realized existing compatibility to all 802.11 protocol suite master chips.

Description of drawings

Fig. 1 is the device and method that standard of the present invention automaticallyes switch, and is device (being called for short " the bimodulus ") structural representation of a kind of automatic realization WLAN (wireless local area network) national standard and international standard.

Fig. 2 is the schematic diagram of information processing more specifically of device shown in Figure 1.

Embodiment

The invention will be further described below in conjunction with accompanying drawing

This device comprises:

Interface module, it comprises radio-frequency module 1 and output interface module 4;

With the two-way iic bus band WAPI enciphering/deciphering module 3 that is connected of interface module;

Clock control module 6, it provides this device information to flow to and synchronised clock;

The memory module 5 of two-way connection, by the FLASH of 32 bit data width, the SDRAM of 32 bit data width, BOOT ROM form, and deposit operation of main control module chip and WAPI enciphering/deciphering module and initialize routine in it.

Described output module 4 can be selected USB interface for use as required, perhaps adopts pcmcia interface, perhaps adopts the MINIPCI interface, perhaps adopts PCI, RJ45.

Described main control module 2 is primary processors that existing manufacturer has 802.11 agreements.This primary processor and memory module cooperate finishes three major functions:

1) processing of system information, control.Automatically realize the information Recognition of WLAN (wireless local area network) national standard and international standard, circulation.

2) finish the information processing of 802.11 agreement international standards.

3) finish of forwarding, the processing of the information of 802.11 agreement national standards to WAPI enciphering/deciphering module 3.Described WAPI enciphering/deciphering module 3 major functions are to reply with main control module, finish the protocol authentication, the information enciphering/deciphering that meet national standard.

The invention provides the device and method that a kind of above-mentioned standard automaticallyes switch, embodiment comprises the steps: in conjunction with the message processing flow of AP access point and netting twine

The function that embodiment realizes: in AP, realize to accept the wireless network of WAPI standard and the wireless network of international standard simultaneously.

Fig. 2 explanation:

1), whole system logically is divided into 4 parts:

● STA: portable terminal can be the wireless network card of WAPI national standard, also can be the wireless network card of 802.11 agreement international standards.

● ASU: the entity of authentication WAPI

● AP (WAPI part): logically be divided into the WAPI part to an AP entity here, also is to divide from software function, and the function of this part is handled WAPI agreement flow process and WAPI encrypted packets exactly

● AP (international standard part): logically be divided into the international standard part to an AP entity here, and the major function of this part is to handle the agreement flow process (comprising the WEP part) and the WEP enciphered data of international standard

2), entity line and empty body line:

● the entity line is represented the packet in the identifying procedure.

● empty body line is represented packet, comprises the encrypted data packet by WAI, encrypted data packet not, WEP encrypted data packet

3), entity is the numeral number on the empty body line:

(1), the discriminating activation data bag that sends of AP, belong to WAPI agreement (maximum 3 times)

(2), insert to differentiate and request data package to belong to the WAPI agreement

(3), the request of certificate authentication packet, belong to the WAPI agreement

(4), certificate is differentiated and response data packet to be belonged to the WAPI agreement

(5), insert to differentiate and response data packet to belong to the WAPI agreement

(6), the unicast key agreement request packet, belong to the WAPI agreement

(7), the unicast key agreement response data packet, belong to the WAPI agreement

(8), the multicast key notification packet, belong to the WAPI agreement

(9), the multicast key response data packet, belong to the WAPI agreement

(10), the encrypted packets (STA-＞AP (WAPI part)) of process WAI

(11), through the encrypted packets of WAI (AP (WAPI part)-＞STA)

(12), do not pass through WAI or WEP encrypted data packet

(13), through the WEP encrypted data packet

4), flow process is simply narrated:

STA is after being connected to AP on the physical link, AP initiatively sends and differentiates the activation data bag, if responding at limited number of times with in the stipulated time to insert, STA differentiates request data package, illustrate that this STA is to use the WAPI national standard to insert, AP indicates that this STA is related with WAPI in the table of oneself safeguarding, AP treats this STA as WAPI STA in STA this time connects.Flow process is exactly 1,2,3,4,5,6,7,8,9,10,11.Do not differentiate request data package if STA responds to insert at limited number of times with in the stipulated time, illustrate that this STA is to use the STA of 802.11 international standards, AP treats this STA as the STA of international standard in STA this time connects.Flow process is 1,12,13.

Claims

1, the device and method of standard automatic switchover is the device and method of a kind of automatic realization WLAN (wireless local area network) national standard and international standard (bimodulus), it increases control, Rule of judgment with former international standard 802.11 master chips, the mode of memory expansion or increase enciphering/deciphering module realizes, it is characterized in that, comprising:

Radio-frequency module (1);

Main control module (2);

WAPI enciphering/deciphering chess piece (3);

Output module (4);

The memory module of two-way connection (5);

Clock control module (6);

2, the device of realization WLAN (wireless local area network) bimodulus according to claim 1, it is characterized in that, described automatic realization is after AP and STA set up physical link according to 802.11 agreements, AP is after STA sends discriminating activation data bag, whether STA responds at limited number of times with in the stipulated time to insert is differentiated request data package, judges with this to enter the described flow process of different standards.

3, the device and method of standard automatic switchover according to claim 1 is characterized in that described output module 4 can be selected USB interface for use as required, perhaps adopts pcmcia interface, perhaps adopts the MINIPCI interface, perhaps adopts PCI, RJ45.

4, the device and method of standard automatic switchover according to claim 1, it is characterized in that, described bimodulus is to increase the control Rule of judgment on original 802.11 agreement master chips, enlarge on-board memory, or increases WAPI enciphering/deciphering chip again and just can see in fact.