Chapter 10

802.11n HT Analysis

In this chapter, you will learn about the following:

  • Introduction to 802.11n
  • 802.11n Fields, Information Elements, and Frames
    • HT Control Field
    • HT Control Wrapper Frame
    • HT Capabilities Element
    • HT Operation Element
  • Physical Layer Enhancements
    • Spatial Multiplexing
    • Transmit Beamforming
    • Space Time Block Coding (STBC)
    • Antenna Selection
    • 40 MHz Channels
    • Short Guard Interval
    • Modulation and Coding Schemes (MCSs)
  • MAC Layer Enhancements
    • A-MSDU
    • A-MPDU
    • Delayed BlockAcks
    • RIFS
  • 802.11n Protection Mechanisms
    • Mode 0 – Green Field
    • Mode 1 – HT non-Member Protection
    • Mode 2 – HT 20 MHz Protections
    • Mode 3 – Non-HT Mixed Mode
    • Dual CTS
    • L-Sig TXOP Protection
    • Phased Co-Existence Operation
    • 40-MHz Intolerant

The 802.11n amendment ...

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