Transcript Planning for 802.11ac Webinar www.cwnp.com

Planning for
802.11ac
Webinar
www.cwnp.com
Copyright © 2014 CWNP, LLC All rights reserved.
Agenda
1
2
3
4
5
6
Understanding the issues
Planning for coverage
Planning for capacity
Planning for coverage and capacity
Client Considerations
Upgrade Planning
Understanding the Issues
• 802.11ac features:
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Wider channels (up to 160 MHz)
More spatial streams (up to 8)
256-QAM modulation
MU-MIMO (Transmit Beamforming)
Understanding the Issues
• Spectrum utilization
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2.4 GHz vs. 5 GHz
20 MHz
40 MHz
80 MHz
160 MHz
• Data rates
• Increase from 11a/g through 11ac
Planning for Coverage
• No discussion required for 2.4 GHz
• 5 GHz provides for 25 20 MHz channels
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22 are available for use in the US
9 are guaranteed to be available
195 MHz additional space very likely in 2015
Channel reference numbering changed
40
MHz
80
MHz
5.150-5.250
5.250-5.330
5.490-5.730
5.735-5.815
165
161
157
153
149
144
140
UNII-3
136
132
128
124
120
116
112
108
104
100
UNII-2-Extended
64
60
56
52
UNII-2
48
44
40
20
MHz
36
UNII-1
ISM
New with 11ac
TDWR
DFS Channels
Planning for Capacity
• Capacity is king – coverage is assumed
• Stated differently – anyone can do
coverage
• Keith Parsons, “…coverage is easy.”
• Considerations related to capacity:
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Applications
Users/clients
Wireless side
Wired side
• Installing more physical AP devices is
not the only solution
Planning for Coverage and Capacity
• Must consider channel planning with
capacity requirements in mind
• Individual throughput
• Aggregate throughput
• Factors:
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•
•
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Co-channel interference
User volume in channel
Applications
Client types
Client Considerations
• Today
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Most clients on 802.11n
Few clients on 802.11ac
Few clients on 802.11bg
Fewer clients on 802.11a
• Tomorrow
• Most clients on 802.11ac
• Few clients on 802.11n
• DFS and Clients
• Know your clients
• Make DFS support a primary consideration
going forward
Upgrading
• From 802.11n
• Phase 1
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Continue use of 40 MHz channels
• Phase 2
•
After client support: implement 80 MHz channels
• From 802.11a/b/g
• Little use of 11a, but must be considered
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When in place:
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Replace APs with same channel plan
If adding more APs, adjust channel plan after additional
APs are installed
• Maintain existing b/g and overlay ac
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•
Initially, disable 2.4 GHz on ac APs
Enable 2.4 GHz as b/g devices are removed
Tools of the Trade
• Spectrum analyzer
• No new investment required - technically
• Protocol analyzer
• New investment required
• Site survey software
• New investment required
Agenda
1
2
3
4
5
6
Understanding the issues
Planning for coverage
Planning for capacity
Planning for coverage and capacity
Client Considerations
Upgrade Planning