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Paul Ho - Wireless Infrastructure for Mobile e-Learning

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  • 1. Wireless Infrastructure for MobileELearning- Implementing WiFi for Schools Without Compromises Paul Ho System Engineer Cisco System Ltd.© 2010 Cisco and/or its affiliates. All rights reserved. Cisco Confidential 1
  • 2. • Trends: The 21st Century Classroom • Challenging • High Dense Best Practices© 2010 Cisco and/or its affiliates. All rights reserved. Cisco Confidential 2
  • 3. © 2010 Cisco and/or its affiliates. All rights reserved. Cisco Confidential 3
  • 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© 2010 Cisco and/or its affiliates. All rights reserved. Cisco Confidential 4
  • 5. © 2010 Cisco and/or its affiliates. All rights reserved. Cisco Confidential 5
  • 6. © 2010 Cisco and/or its affiliates. All rights reserved. Cisco Confidential 6
  • 7. “Making appropriate investments in computing infrastructure is as important as investing in wiring or lighting..” Dr. Mark Edwards Superintendent Mooresville Graded School District© 2010 Cisco and/or its affiliates. All rights reserved. Cisco Confidential 7
  • 8. It changes how many expect to be connected wherever they are learning Simple Secure Reliable ANY USER ANY DEVICE ANYWHERE ANYTIME
  • 9. 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) © 2010 Cisco and/or its affiliates. All rights reserved. Cisco Confidential 10
  • 10. 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© 2010 Cisco and/or its affiliates. All rights reserved. Cisco Confidential 11
  • 11. • 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)© 2010 Cisco and/or its affiliates. All rights reserved. Cisco Confidential 12
  • 12. • 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)© 2010 Cisco and/or its affiliates. All rights reserved. Cisco Confidential 13
  • 13. • 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© 2010 Cisco and/or its affiliates. All rights reserved. Cisco Confidential 14
  • 14. © 2010 Cisco and/or its affiliates. All rights reserved. Cisco Confidential 15
  • 15. • 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© 2010 Cisco and/or its affiliates. All rights reserved. Cisco Confidential 16
  • 16. • Core network • Wireless capacity and Wifi access points • Density • Security policy • Support model: assisted, self-support • How users will access apps© 2010 Cisco and/or its affiliates. All rights reserved. Cisco Confidential 17
  • 17. Most important thing for iPadsand BYOD is stable RF!!!!© 2010 Cisco and/or its affiliates. All rights reserved. Cisco Confidential 18