converged communications (ccwg) (166376737)
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Deploying 802.11n Pilot
Tammy Closs
Bob Johnson
Kevin Miller
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Introducing Duke
• Research & teaching – Medicine, nursing, basic sciences, genomics,
clinical trials
– Engineering
– Social science, divinity
– Environmental science
– Law, Business, Public Policy
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Hospitals, clinics• Student life: athletics, residential life
• Auxiliaries
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Metrics
• 5,500 undergraduate
• 6,500 graduate
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8,000 faculty• 22,000 staff (incl. medicine)
• 8,600 acres – 1,200 developed
• 48,000 wired ports (excl. medicine)• 7TB+/day to/from Internet
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Campus Maps
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Backdrop for 802.11n
• Duke Digital Initiative
– Inspired new uses for technology in
academics
• Strategic Plan: Making a Difference
– $1.3B over 5-8 yrs (2nd yr)
• Teaching & Learning Center
– Classes as performances
– Primary access: wireless or wired?
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Business Drivers
• Increase in wireless
connectivity
• Decrease in wired use
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Public wired ports(library) completely
unused
• Increased need for
mobility
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Peak Simultaneous Wireless Users
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Current infrastructure
1700 APs
+800 APs – Res. Halls
11 WiSM
60% Coverage
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802.11n First look
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Pilot Environment
• Epworth Residence Hall
– 16K S.F.
– ~55 students, faculty-in-residence
– Previously hotspot-only 802.11b/g
• Qty. 8 – AP1252 (2.4GHz + 5GHz)
• Dedicated 4402 (code eval)
• 3750G + 802.3at PoE injectors
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Intensive Testing
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Experiences
• 40%+ connecting with 802.11n
– MacBook
– Dell, Lenovo, others
• 129Mbps+ peak throughput (11n clients)
• 802.11g client: 2x faster on 11n AP
compared to 11g AP
– Especially pronounced at greater distances
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Next Steps
• Campus-wide 802.11n rollout over next 6-9months – 1:1 swap of existing 802.11a/b/g APs
– Completing wireless deployment in reshalls
• All new laptops to have 802.11n radios
• Prioritizing locations – Teaching and learning spaces
– Greenfield opportunities (“New Campus”)
• Risk mitigation – 802.11n standard
– PoE, GbE connectivity
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Financial Considerations
• Evaluation of funding approachfor wired and wirelessnetworks
– Wireless installed with one-time
funds – Wired network: ongoing refresh
budget
• 802.11n upgrade: advancingplanned 4 year refresh cycle
• Observation: wired networksize decreases, yet cost perport will increase (GbE, 10GbE)
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Future
• Experimenting with HDTV-over-WiFi
• Preparing for phase-out of 802.11b
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Legacy devices v. leading edge• Refresh issues with Auxiliaries (inventory, PoS)
• VoWiFi
– Location, E911
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Questions
• Future of wired VoIP phones?
• Future of wired ports?
• Laptop backup on wireless network?• Gaming – suitable over wireless?
• Multicast applications on wireless? (IPTV)
• Wireless security & usability
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Contact Information
• Bob Johnson
– +1 919 668 1762
• Kevin Miller
– +1 919 668 6484