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The Study and Design of Wireless Access Point

Author: ZhangZuoZuo
Tutor: ShaoShi
School: East China Normal University
Course: Applied Computer Technology
Keywords: Wireless LAN The wireless access point IEEE802.11 Embedded Systems uClinux
CLC: TN925.93
Type: Master's thesis
Year: 2006
Downloads: 261
Quote: 3
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Abstract


With the development of wireless technology and the reduction of production costs, wireless LAN (Wireless Local Area Network, WLAN), its easy to install, flexible, economical, and paid close attention to mobility characteristics, growing very rapidly. The wireless access point (Access Point) is an important part of building a wireless LAN, wireless network for the mobile host to provide access to the Internet and extranet services, frame forwarding to each other between the wireless network and the wired network. WLAN equipment, the price of the AP in terms of relative wireless network card is much more expensive, while some of the AP's alternative is more complex, higher operating requirements of the user. Therefore, in order to save costs, make better use of the existing embedded devices, expansion of the function of the wireless card, this article-depth analysis of the IEEE802.11b specification and uClinux device driver and Prism 3.0 chipset depth research based on uClinux USB interface Wireless LAN Driver operating system, developed on the basis of the Host AP driver. In this way, the wireless card can be dynamic in the the Station mode \A configuration port USB and wired network embedded devices, access the wireless card, self-configured by the user, in addition to access to the network through the wireless network card, also by enabling the NIC, the function of the device with the AP. Basic functions, the design Soft AP AP does not make much difference, access capacity and coverage in Soft AP AP indicators can not, but the Soft AP has some advantages in the application. Because users can simply use the existing embedded devices, the corresponding AP driver module is loaded, you can enable the AP function of the device, it can reduce the cost of wireless networking. The Soft AP implemented in this article is to run through the host CPU and completed almost all 802.11b control function this way software is very flexible program easier to modify the user depending on the application need to be developed and enhanced AP's performance and management capabilities. With the large-scale deployment of wireless network infrastructure, an endless stream of new norms and standards in the wireless network, the use of the design of this article can be easily upgraded, and only need to replace the wireless card and modify the corresponding drive can be upgraded to 802.11g, and even update version. The Soft AP to provide an economical and convenient way of networking for a small number of users in the local area, temporary networking needs, to better reflect the advantages of flexible, practical application significance. This paper focuses on the IEEE802.11 standard, the different implementations of the AP, and then defines the basic functionality of the Host AP, given the Host AP hardware platform design and software design. Next, do a detailed discussion of based on Prism3.0 chipset wireless port driver to achieve specific description is given, and the design and implementation of the AP function. Finally, on the drive to achieve the functionality, performance testing, to verify the feasibility of the Soft AP.

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CLC: > Industrial Technology > Radio electronics, telecommunications technology > Wireless communications > Radio relay communications,microwave communications > Wireless subscriber loop ( Radio Access Network)
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