The future of wi fi
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The Future of Wi-Fi. Dirk Gates Chief Executive Officer. Lessons in Networking. Wi-Fi Evolution. Wireless Market Drivers 75M Wi-Fi clients in 2006 70M hybrid phones by 2007 More business applications $2B Market in 2006. Connection Growth. Connection Growth. 100Base-T. 100Base-T.

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The Future of Wi-Fi

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The future of wi fi

The Future of Wi-Fi

Dirk GatesChief Executive Officer


Lessons in networking

Lessons in Networking

Wi-Fi Evolution

  • Wireless Market Drivers

    • 75M Wi-Fi clients in 2006

    • 70M hybrid phones by 2007

    • More business applications

    • $2B Market in 2006

Connection Growth

Connection Growth

100Base-T

100Base-T

802.11i

L2 Switching

L2 Switching

802.11b/a

10Base-T

10Base-T

802.11g

802.11

WLAN Array

2000

2000

2005

2010

1990

1990

1995

1995

Connectivity

Connectivity

Capacity

Capacity

  • Ethernet Evolution

  • Wi-Fi Hits Critical Inflection Point

    • Current WLAN architectures won’t support surge in demand

    • Need simple architecture to support coverage AND capacity


Wi fi deployment evolution

Wi-Fi Deployment Evolution

54

1,404

162

Mbps

11

33

3 26

Non-overlapping Channels

802.11b 802.11g 802.11a

  • Deployment Recommendation

    • Deploy a multi-mode (802.11a/b/g) infrastructure

  • Increased Capacity

    • 802.11a adds 23 more channels

    • 1,242Mbps of additional capacity

  • Increased Performance

    • 802.11g better than 802.11b (but degrades in its presence)

    • 802.11a adds clean spectrum (less interference)

      • Higher overall performance

      • Range now matches 802.11g

  • Now Industry Standard

    • All leading chipset vendors are shipping multimode as standard offering*

    • By next year, nearly all enterprise class notebooks will be 802.11a/b/g capable*

    • Proposed 802.11n standard will virtually eliminate 802.11b/g

      • Channel bonding scheme in 802.11n leaves only one bonded channel in 2.4GHz

* Source: Del Oro 2004


Wi fi evolution

Wi-Fi Evolution

New Client Sales

90

80

70

60

50

Millions

40

30

20

10

0

2004

2005

2006

2007

2008

2009

2010

10.17

8.39

7.40

7.04

7.22

6.52

3.04

.11b

29.43

34.33

25.47

11.91

7.46

4.89

3.81

.11b/g

16.89

33.57

52.50

66.90

71.94

68.90

63.78

.11a/b/g

.11a/b/g/n

0.00

0.00

5.93

17.69

33.65

55.52

81.48

56.49

76.30

91.30

103.53

120.26

135.83

152.11

Total

% w/ 802.11a

30%

44%

58%

65%

60%

51%

42%

New Client Shipments

  • Migration to Multi-mode

    • 2.4GHz does not support future WLAN needs

    • 802.11a client shipments surpass 802.11b/g only clients this year

    • Chipset suppliers have announced a/b/g solutions for mobile phones (designs currently in development)

  • Other Data Points

    • Chip makers driving a/b/g adoption

      • Less interference

      • Huge push beginning 2005

    • 50M+ a/b/g chips forecast in 2006

    • Price delta b/g vs. a/b/g < $6


Deploy for voice and data

Deploy for Voice and Data

  • Design for Capacity – Not Just Coverage

    • Over provision for wireless (same as for wired)

    • Use all available 802.11a/b/g channels simultaneously

    • Reuse channels as often as possible

    • Deploy for 54Mbps everywhere

    • Keep cell sizes small

    • Minimize simultaneous users per cell

  • Optimize for Voice

    • Fewer users at higher data rates = less contention/latency

    • Small cells & higher rates = lower Tx power & faster Tx time = longer battery life

    • Insist on standards-based QoS (802.11e / WMM)

    • Use VLANs and SSIDs to map wired VoIP to VoWLAN

    • Minimize roaming domains through WLAN switching

  • Build a Wi-Fi Network to do more than ONE THING!


Current architecture suitability for voice and data

Current Architecture Suitability for Voice and Data

  • Traditional “Fat” Access Point Deployments

    • Too many devices

    • Expensive to deploy

    • Hard to manage

    • Poor roaming capabilities

  • “Thin” Access Points + “WLAN Switch” Infrastructure

    • Even more devices and equipment

    • Still hard to deploy

    • More Expensive

    • Easier to manage

    • Does not scale

    • Better roaming


Current architectures

Current Architectures

Current Architecture Suitability for Voice and Data

  • Proprietary TDMA-based Products

    • Multiple Access Points - Single Channel and BSSID

    • Creates a single, large collision domain

    • Transparent roaming at the expense of capacity

    • Lowest capacity architecture for data

    • Does not work well with standard APs

  • Integrated High Count Radio Solutions

    • Switch + Multiple Integrated Access Points

    • Operates on all available channels

    • Fewer devices to deploy and manage

    • Sectorized coverage best for channel reuse

    • Stations roam less

    • Ideal for voice – lowest latency

    • Best architecture for both voice and data

    • Best TCO


Summary

Summary

  • Those who do not learn from history are doomed to repeat it.

  • Coverage is so 90’s – it’s all about capacity.

  • Get thee to 5GHz.

  • Voice is coming – be prepared.

  • Don’t ride a one trick pony.


Thank you

Thank You

Dirk Gates

Chief Executive Officer

[email protected]

www.xirrus.com


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