| Many large and medium sized enterprises have begun to use WLAN (Wireless Local Area Networks) to replace their traditional network under the influence of many factors. WLAN is superior to the traditional network in mobility, deployment and cost. Performance of WLAN will get a great discount if the network fails to design, deploy and maintain the program which can deal with problems caused by interference. Finding and solving interference have always been an important task during the development of WLAN.Interferences can be classified into WLAN interference and non-WLAN interference according to the source. Band navigation which aims to solve interference from interior of network can decrease WLAN interference through band navigation module of WLAN card which supports band2.4GHz and5GHz according to load of the two bands. Spectrum analysis aims at dealing with interference coming from exterior of WLAN such as bluetooth, microwave oven and MS XBOX,etc. Spectrum analysis can find interference source by real-time monitoring non-WLAN signals in wireless network device. Interference is avoided according to communication quality of present channel would navigate the requested association frame when a station correlate AP (Access Point). Interference device processing module belonging to spectrum analysis can filter interference device information reported by driver of AP, report interference device information to AC, make AC receive and maintain interference device information and send Trap warning to network management software.Firstly, application background, working principle and needs of function of band navigation and spectrum analysis are analyzed in general. Secondly, need analysis and design of association frame processing module belong to band navigation and interference device processing module belonging to spectrum analysis are made with great emphasis. Thirdly, the dissertation ends with the conclusion and expectation of the two sub-modules. |
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