The document discusses implementing wireless infrastructure for mobile e-learning in schools. It notes that global mobile traffic is expected to grow substantially by 2015 and video will account for most mobile traffic. The document outlines best practices for deploying high-density WiFi networks in schools to support bringing personal devices and 1-to-1 computing initiatives. These include using a wireless controller to manage access points centrally and optimize radio frequencies across the network. Key considerations for mobile learning programs are ensuring sufficient wireless capacity, developing policies for security and acceptable use, and getting support from teachers, parents and administrators.

1. Wireless Infrastructure for Mobile
ELearning
- Implementing WiFi for Schools Without Compromises
Paul Ho
System Engineer
Cisco System Ltd.
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2. • Trends: The 21st Century Classroom
• Challenging
• High Dense Best Practices
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4. 2015 Global Mobile Traffic
7B Mobile Devices Will Grow 26x
Video Will Be 66% of All Mobile Traffic
Source: Cisco Visual Networking Index (VNI) Global Mobile Data Forecast, 2010–2015
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7. “Making appropriate
investments in computing
infrastructure is as
important as investing in
wiring or lighting..”
Dr. Mark Edwards
Superintendent
Mooresville Graded School District
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9. It changes how many expect to be connected wherever they are learning
Simple Secure Reliable
ANY USER ANY DEVICE
ANYWHERE ANYTIME

10. What is Wireless LAN?
 A method of transmitting data over the air, in a LAN setting
 Notice: this is NOT a Cellular mobile technology (like GSM, CDMA)
 Wi-Fi – A trademark of the Wi-Fi Alliance
 Wireless Fidelity, derived from the audio term High Fidelity (Hi-Fi)
 The Wi-Fi Alliance certifies Wi-Fi products if they comply to 802.11
inter-Operability standards
 IEEE 802.11 is a set of standards for WLAN communication
 Standards that exist today:
Standard Band Bit-Rate
802.11a 5 GHz 54 Mbps
802.11b 2.4 GHz 11 Mbps
802.11g 2.4 GHz 54 Mbps
802.11n / MIMO 2.4 and 5 GHz Up to 450 Mbps (3x3)
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11. What is a WLAN Access Point (AP) ?
 A Wireless Access Point connects the wired network to wireless
devices (stations)
 Fat AP – AP with security and limited management capability in the
unit itself.
 Translates signals and manages network transmission to/from the
wireless devices and the core network
 Each wireless network is identified by a SSID (Service Set Identifier)
SSID
Internet
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12. • Coverage
 In a typical office, Wi-Fi network transmitting distance can be 75-150 ft. W
 Wi-Fi speed is decrease with the distance from the AP
 Fast roaming technology is required for pervasive coverage
• Interference with other appliances, co-channels
 2.4 GHz and 5 GHz, Public Spectrum, ISM band.
 Microwave, cordless phone, baby monitors, security cameras, Bluetooth
devices, Amateur radio, video senders are all operated in 2.4GHz spectrum,
shared the band with Wi-Fi.
 Jam with other APs at the same channel
• Security
Old Standard, WEP,  Replace by new Standard IEEE802.11i/WPA2, much
safer now
• Capacity
Legacy 11b (11Mbps)  Latest 11n (300/450Mbps)  Coming 11ac (> 1Gbps)
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13. • High density wireless devices in the classroom
• 1-1 Computing
• Multiple devices per users
• Add more Access Point won’t solve this
problem, Why?
• Channel Limitations
• 3 non-overlapping channels in 2.4 GHz (11b or 11g)
• Co-Channel Interference
• 4-21 non-overlapping channels in 5 GHz (11a)
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14. • Holistic View of the
Network
• Centralization provides
Wireless Controller
perspective on Central
Management
relationships between
Switch/Routed
APs Network
• Enables optimal RF
calibration for a large
wireless network
• Maximize Wireless capacity,
minimize Interference and
effective client roaming
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16. • Get buy-in from parents,
school board, faculty
• Enlist tech-savvy teachers to
vet instructional technology
and create success stories
• Think about curriculum
changes, digital resources,
teaching
• Wireless network infrastructure
capacity
• Start with a pilot program to
determine feasibility of
allowing students to bring their
own devices to class
• Create “acceptable use policy”
• Teach students digital
citizenship
• Monitor test scores and
outcomes
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17. • Core network
• Wireless capacity and
Wifi access points
• Density
• Security policy
• Support model: assisted,
self-support
• How users will access
apps
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18. Most important thing for iPads
and BYOD is stable RF!!!!
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