A Wireless World Emerges?

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(No Transcript)
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A Wireless World Emerges?

• The Benefits and Challenges of Businesses Based
  on WiFi

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Who is Cognio?
5 year old company focused on spectrum
analysis/analytics capabilities

• The market leader in Enterprise WiFi RF tools
• Based in Germantown, MD
• Key patent holders in WiFi interference and
  mitigation with dozens of patents in this space
• OEMs AirMagnet, Cisco, Fluke, WildPackets
• Solutions tools and embedded solutions for
  mitigating RF interference

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WiFi Technology Enablers

• Free spectrum
• Inexpensive devices
• Standardization

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Driving Innovations in Productivity and Commerce
Environment Applications
Retail Asset tracking Inventory management In store telephony Mobile kiosks
Healthcare Mobile bedside care Location-based call routing Asset tracking
Financial services Real time mobile data Guest and contractor access Video surveillance
Government Public safety and security Digital communities Emergency services
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Meets All of Our Need to be Free

• Untethered
• Realtime
• Fast

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The Unlicensed Band Experiment

• We are about to have an unplanned real-time
  experiment on the consequences of uncoordinated
  spectral sharing using incompatible etiquette
  rules

- USA Federal Communications Commission,
Technical Advisory Committee Meeting Report 12/00
Unlicensed band
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The Experiment is a Success!
Experimental Result Many device types and
devices
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Are we heading for a train wreck?
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For WiFi, other WiFi is a problem

• Co-channel interference (CCI) comes from another
  AP located on the same channel
• Ex. AP next door
• Ex. Neighboring cell
• With CSMA, effectively share the capacity
• Adjacent channel interference (ACI) comes from an
  AP on an overlapping channel
• Ex. I am on channel 1, another AP is on channel
  2
• Can be more worse than (CCI)

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And then, theres the rest
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Performance Requirements for Applications
Max Jitter
Max Latency
Max Packet Error Rate
Data Throughput Rate
Number of Streams
Type of Service
/-10ms
90ms
3.6 10-5
30 Mbps
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Multiple Stream(1 HDTV/2SDTV)
/-10ms
90ms
3.6 10-5
19-24 Mbps
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HDTV
/-10ms
90ms
3.6 10-5
3 to 7 Mbps
1
SDTV/DVD
/-5ms
10ms
3.6 10-5
3 Mbps
2 per
HQ Video Conf. Call
/-10ms
100ms
5.8 10-5
256 kbps
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CD Quality Audio
gt100ms
gt100ms
0
10 Mbps
1
High Speed Data
gt100ms
gt100ms
0
2 Mbps
1
Med. Speed Data
gt100ms
gt100ms
0
500 kbps
1
Low Speed Data
/-5ms
10ms
1.5 10-3
128 kbps
2 per
HQ Voice Calls
/-20ms
30ms
1.5 10-3
16 kbps
2 per
MQ Voice Calls
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The Effects of Interference on VoFi
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The Effect in Carrier/Home Environments
Consumer gripes
WiFi in the Home Report
90 Consumers that say they have had a bad experience
85 Admit to swearing, shouting, crying or hitting something in frustration
71 Think customer service representatives aren't sufficiently trained
63 Believe outstanding customer service is the 1 reason to give more business to a company
53 Believe inability to reach service representatives over the phone or web is the 1 consumer compliant

• 67 of all residential WiFi problems are
  interference related
• Creates high cost to providers
• Truck rolls (35 of issues)
• Product returns (20 of issues)
• Churn (29 of issues)
• Voice and video requires service without
  interruptions or jitter caused by interference

Technology troubles set off tantrums, tears, and
tirades. USA Today
Source Harris Interactive Survey, October 2006
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So, what to do?
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Incorporate RF plans into your WiFi Planning
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Buy the Right Infrastructure

• 24x7 monitoring
• Mitigation
• Better QoS

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Use Tools. They Help.
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Conclusions

• Unlicensed Band and WiFi experiment was a success
  to date
• WiFi delivers significant new capabilities and
  applications
• But there are growing pains related to congestion
• And this impacts reliability, cost of ownership,
  customer satisfaction
• To implement these solutions, and to achieve the
  benefits, planning must be addressed consistently
  throughout the WiFi life cycle.