Chapter 6. Medium Access Control (MAC) for IEEE 802.11 Networks

Venkatesh Vadde and Sridhar Ramesh

IN THIS CHAPTER

The throughput of a WLAN is impacted not only by the channel quality, SNR, and diversity in the PHY layer but also by the medium access control (MAC) protocol. The MAC in IEEE 802.11a WLANs assumes significance owing to the specific nature of a wireless medium. Unlike in wired media, the channel in a wireless OFDM system changes dynamically, leading to unpredictable fading and to a high bit error rate (BER). The high BER often degrades further owing to the inability to detect an impending collision ...

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