Cisco Aironet 2702i AIR-CAP2702I-E-K9 전단

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AIR-CAP2702I-E-K9

© 2014 Cisco and/or its affiliates. All rights reserved. This document is Cisco Public Information.

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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 ...................................................................................................................................... 16

2.3.8 Regulatory Considerations ................................................................................................................. 16

2.3.9 MU-MIMO .............................................................................................................................................. 17

2.3.10 802.11ac Project Authorization Request ......................................................................................... 18

3. When Is 802.11ac Happening? ......................................................................................................................... 19

4. How Does 802.11ac 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