《white_paper_c11-713103》.pdf
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White Paper
802.11ac: The Fifth
Generation of Wi-Fi
Technical White Paper
January 2014
© 2014 Cisco and/or its affiliates. All rights reserved. This document is Cisco Public Information. Page 1 of 1
Contents
1. Executive Summary 3
2. What Is 802.11ac? 4
2.1 Drivers for 802.11ac 4
2.2 How Does 802.11ac Go So Fast? 5
2.3 How Do We Make 802.11ac Robust? 7
2.3.1 Technology Overview 7
2.3.2 Differences Between 802.11ac and 802.11n 8
2.3.3 Standards-Based Beamforming 9
2.3.4 RTS/CTS with Bandwidth Indication 10
2.3.5 All A-MPDUs 12
2.3.6 Channelization and 80+80 MHz 12
2.3.7 Rate at Range 15
2.3.8 Regulatory 16
2.3.9 MU-MIMO 17
2.3.10 802.11ac Project Authorization Request 18
3. When Is 11ac Happening? 18
4. How Does 11ac Affect Me? 19
4.1 Compatibility 19
4.2 When to Upgrade to 802.11ac? 20
4.3 Radio Resource Management and WIPS Effects 21
5. Summary 21
Appendix: What Is 802.11n? 21
© 2014 Cisco and/or its affiliates. All rights reserved. This document is Cisco Public Information.
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