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The Future of Wi-Fi

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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  1. The Future of Wi-Fi Dirk GatesChief Executive Officer

  2. 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

  3. 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

  4. 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

  5. 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!

  6. 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

  7. 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

  8. 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.

  9. Thank You Dirk Gates Chief Executive Officer dirk.gates@xirrus.com www.xirrus.com

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