802.11ac: A Survival Guide"O'Reilly Media, Inc.", 2013 - IEEE 802.11 (Standard) 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. Author Matthew Gast--an industry expert who led the development of 802.11-2012 and security task groups at the Wi-Fi Alliance--explains how 802.11ac will not only increase the speed of your network, but its capacity as well. Whether you need to serve more clients with your current level of throughput, or serve your existing client load with higher throughput, 802.11ac is the solution. This book gets you started. Understand how the 802.11ac protocol works to improve the speed and capacity of a wireless LAN Explore how beamforming increases speed capacity by improving link margin, and lays the foundation for multi-user MIMO Learn how multi-user MIMO increases capacity by enabling an AP to send data to multiple clients simultaneously Plan when and how to upgrade your network to 802.11ac by evaluating client devices, applications, and network connections. |
Contents
Chapter 1 Introduction to 80211ac | 1 |
Chapter 2 The PHY | 11 |
Chapter 3 The MAC | 37 |
Chapter 4 Beamforming in 80211ac | 59 |
Chapter 5 80211ac Planning | 87 |
Glossary | 127 |
About the Author | 136 |
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Common terms and phrases
2.4 GHz band 80 MHz channel A-MPDU access points airtime applications authentication beamforming bits Block ACK bytes capabilities capacity CCMP certification channel bandwidth channel width client devices Compressed Beamforming constellation points control plane convolutional code coverage Data field data rates deployment described designed DTIM enables encoding encryption Ethernet feedback matrix forward error correction Gbps gigabit guard interval header implement increase interoperability LDPC management plane maximum Mbps MHz primary MU-MIMO multi-user MIMO multi-user transmission multicast multiple NDP Announcement frame network administrators null data packet number of spatial OFDM Optional payload phase shift physical layer physical layer frame PLCP protocol features receiver Segment short guard interval Signal B field single single-stream single-user space-time streams speed standard STBC steering matrix subcarriers symbol throughput TKIP traffic transmit vendors VHT Signal wave Wi-Fi Alliance wider channels wireless LAN wireless network