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Study MAC Sub-layer of WLAN and Design Based on ARM

Author: YangAiMin
Tutor: SongZhongKang
School: Wuhan University of Technology
Course: Control Theory and Control Engineering
Keywords: Wireless LAN Medium Access Control Protocol Distributed Coordination Function Centralized coordination function
CLC: TP393.17
Type: Master's thesis
Year: 2006
Downloads: 256
Quote: 1
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Abstract


Currently, the rapid development of wireless LAN technology, which is another hot after following 3G communications. Wireless LAN (Wireless LAN, WLAN), a wireless medium, to provide a wireless data communication system of peer to peer and point-to-point connection. Industry there are a variety of wireless LAN standard, which is the most widely used of the IEEE released IEEE802.11x series of standards, the standard specification of Wireless LAN Medium Access Control (MAC) layer and physical layer (PHY). MAC layer protocol and is key to the development of independent intellectual property rights wireless LAN products. Paper the IEEE802.11b standard as the basis of research and design. The paper analyzes their respective characteristics and application of wireless LAN standard is more popular in the industry, the advantages of the wireless LAN and the main application areas. IEEE802.11b wireless LAN networking features, basically part of the logical service interface, two basic wireless LAN networking model - BSS (Basic Serve Set) and IBSS (Independment, Basic Serve Set). Nine kinds of basic services provided by the MAC layer, and the relationship between various services, in-depth analysis. The data, management and control of the MAC frame structure. Paper two basic IEEE802.11b wireless LAN access methods - DCF (Distributed Coordination control function) and the PCF (centralized coordination control function) were analyzed. System particularly DCF based CSMA / CA (collision avoidance carrier sense multiple access) technology, in-depth analysis, focusing on the Carrier Sense, random back-off mechanism, recovery and retransmission of the frame, the channel control technology. The MAC layer management functions, wherein the frame synchronization maintenance, made a detailed study of capture and the implementation details of the scanning and power management. Papers presented on the basis of analysis of the MAC layer protocol based on 32 ARM processor S3C4510B in wireless card design. The specific MAC controller part of the design, the design of the the MAC controller's hardware circuit to achieve a real-time kernel uC/OS- Ⅱ transplant in S3C4510B processor as the operating environment of the MAC protocol software. Finally, according to the modular program design thinking, design the the site MAC layer protocol software, the entire protocol functions into seven functional modules, described in detail the functions of each protocol modules and module function, design four modules which procedures.

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CLC: > Industrial Technology > Automation technology,computer technology > Computing technology,computer technology > Computer applications > Computer network > Local area network (LAN), metropolitan - area network (MAN) > Wireless LAN
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