You are previewing 802.11ac: A Survival Guide.
O'Reilly logo
802.11ac: A Survival Guide

Book Description

The next frontier for wireless LANs is 802.11ac, a standard that increases throughput beyond one gigabit per second. This concise guide provides in-depth information to help you plan for 802.11ac, with technical details on design, network operations, deployment, and monitoring.

Table of Contents

  1. Dedication
  2. Special Upgrade Offer
  3. Foreword
  4. Preface
    1. Audience
    2. Conventions Used in This Book
    3. Safari® Books Online
    4. How to Contact Us
    5. Acknowledgments
  5. 1. Introduction to 802.11ac
    1. History
    2. The Core Technology of 802.11ac
      1. Beamforming and Multi-User MIMO (MU-MIMO)
      2. Operating Frequency Band for 802.11ac
    3. 802.11ac Product Development Plans
  6. 2. The PHY
    1. Extended MIMO Operations
    2. Radio Channels in 802.11ac
      1. Radio Channel Layout
        1. Radio channel spectral mask
      2. Available Channel Map
    3. Transmission: Modulation, Coding, and Guard Interval
      1. Modulation and Coding Set (MCS)
        1. 256-QAM modulation
      2. Guard Interval
      3. Error-Correcting Codes
    4. PHY-Level Framing
      1. The VHT Signal Fields
        1. VHT Signal A field
        2. VHT Signal B field
      2. The Data Field
    5. The Transmission and Reception Process
    6. 802.11ac Data Rates
      1. 802.11ac Data Rate Matrix
        1. “Missing” MCS values
      2. Comparison of 802.11ac Data Rates to Other 802.11 PHYs
    7. Mandatory PHY Features
  7. 3. The MAC
    1. Framing
      1. Frame Size and Aggregation
      2. Management Frames
        1. The VHT Capabilities Information element
        2. The VHT Operation Information element
        3. Other management frame changes
    2. Medium Access Procedures
      1. Clear-Channel Assessment (CCA)
        1. Basic channel access rules
        2. Sensitivity requirements
      2. Protection and Coexistence of 802.11ac with Older 802.11 Devices
      3. Dynamic Bandwidth Operation (RTS/CTS)
    3. Security
    4. Mandatory MAC Features
  8. 4. Beamforming in 802.11ac
    1. Beamforming Basics
      1. Null Data Packet (NDP) Beamforming in 802.11ac
        1. Channel measurement (sounding) procedures
        2. The feedback matrix
    2. Single-User (SU) Beamforming
      1. Channel Calibration for Single-User Beamforming
        1. NDP Announcement frame
        2. NDP frame
        3. VHT Compressed Beamforming Action frame
    3. Multi-User (MU) Beamforming
      1. Channel Calibration for Multi-User Beamforming
        1. NDP Announcement frame
        2. NDP frame
        3. Compressed Beamforming Action frame
        4. Beamforming Report Poll frame
      2. Multi-User MIMO Transmission
        1. PHY changes for MU-MIMO
        2. Transmission and reception of multi-user data streams
      3. MU-MIMO Implementation
        1. Null steering
        2. Acknowledgement in MU-MIMO
        3. Queuing and quality of service
  9. 5. 802.11ac Planning
    1. Getting Ready for 802.11ac
      1. Catching the 802.11ac Technology Wave
        1. First wave 802.11ac versus second wave 802.11ac
      2. Client Device Mix
      3. Application Planning
        1. Admission control
      4. Physical Network Connections
        1. Backbone connectivity
        2. Power requirements
      5. Security
        1. Link-layer encryption
        2. Fast roaming
        3. Management frame protection
        4. Authentication
      6. Additional Planning Considerations
        1. Guest management
        2. Intrusion detection
    2. 802.11ac Radio Planning
      1. Available Radio Channels
      2. Coverage and Capacity Estimates
        1. Initial 802.11ac AP mounting locations
        2. 5 GHz coverage and 802.11ac-only APs
      3. Equipment Selection
      4. Network Architecture for 802.11ac
        1. Architecture comparison
        2. Selecting a network architecture
          1. Management plane
          2. Data plane
          3. Control plane
      5. Hardware Considerations
        1. Mandatory tests
        2. Optional tests
    3. Building an 802.11ac Network
      1. Channel Selection
      2. Network Tuning and Optimization
        1. Voice
        2. Multicast
    4. Checklist
  10. Glossary
  11. About the Author
  12. Colophon
  13. Special Upgrade Offer
  14. Copyright