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The University of Hong Kong Information Technology Services
Coverage of WiFi Network
Total no. of APs > 1500 Locations:
Classrooms & Lecture Theatres Libraries Residential Halls Departmental Offices and Premises Amenities Centres, PC laboratories and Open Areas (podia)
802.11b&g -> 802.11n
2008: 200 units of “IEEE 802.11n draft 2.0” Aruba access points as pilot test. Scope:
replaced 100 units of 802.11b access points installed over 5 years. added 100 new 802.11n access points to augment WiFi coverage.
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The University of Hong Kong Information Technology Services
Recent Major Upgrades
Robert Black College
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The University of Hong Kong Information Technology Services
WiFi Network Accessibility
PC Laboratories
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The University of Hong Kong Information Technology Services
Schematic Diagram of HKU WiFi Network
Staff Network
530 new APs for student residential halls 810 mainly for replacing existing 802.11b&g Aps
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The University of Hong Kong Information Technology Services
0
501
2004/05
537
2005/06
570
587
2006/07
2007/08
1,527 840
2008/09
2009/10
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The University of Hong Kong Information Technology Services
WiFi Users
<presenter> Computer Centre
Recent Major Upgrades
WiFi for Student Residential Halls
Internet
Router
Access control
WiFi Network
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The University of Hong Kong Information Technology Services
Simplified Thin-AP System Configuration
WiFi controller
Brief History
Year 2000-2003 2004-2005 2006-2007 2008 2009-2010
Standard 802.11b 802.11b/g
802.11b/g 802.11b/g/n (draft 2.0) 802.11b/g/n
AP type Fat AP Fat AP Thin AP Thin AP Thin AP
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The University of Hong Kong Information Technology Services
WiFi Network Accessibility
Lecture Theatres
Departmental Conference Rooms
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The University of Hong Kong Information Technology Services
2
The University of Hong Kong Information Technology Services
Brief history of WiFi development in HKU
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The University of Hong Kong Information Technology Services
Components of WiFi network
DHCP Server
Radius Server
Core switch
WiFi Controllers
Tunnel
Tunnel
ITS Building
Router
Access switch
AP Distribution switch AP AP Access switch
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The University of Hong Kong Information Technology Services
Recent Major Upgrades
WiFi for Student Residential Halls
1998: wired network connection for all student residential halls 2010: 570 APs for 17 halls, 1 guest house; 4700 places
WiFi controller
Primary link
Resilient links
Primary link
Campus network
Thin access points
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The University of Hong Kong Information Technology Services
Schematic Diagram of HKU WiFi Network
Brand Orinoco/Proxim Orinoco/Proxim 3Com Aruba H3C
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The University of Hong Kong Information Technology Services
Coverage, topology and usage statistics
Notebook
Notebook Mobile Device
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The University of Hong Kong Information Technology Services
Schematic Diagram of WiFi Network – inside building
AP Access switch
2006/07
2007/08
2008/09
2009/10
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The University of Hong Kong Information Technology Services
Number of WiFi Access Points
1,600 1,400 1,200 1,000
800 600 400 200
<date>
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The University of Hong Kong Information Technology Services
WiFi Usage
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The University of Hong Kong Information Technology Services
Recent Major Upgrades:
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The University of Hong Kong Information Technology Services
Recent Major Upgrades
St. John’s College University Hall
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The University of Hong Kong Information Technology Services
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The University of Hong Kong Information Technology Services
Recent Major Upgrades
802.11b&g -> 802.11n
2009: wide deployment of 802.11n-ready access points in HKU 1340 H3C access points (H3C WA2620EAGN)
Recent Major Upgrades
802.11b&g -> 802.11n
6 H3C WX6103 controllers (3+3 redundancy) All 802.11n APs in HKU after this upgrade Upgrade expected to be completed before end of 2010.
Recent Major Upgrades
Ricci Hall
Simon K. Y. Lee Hall
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The University of Hong Kong Information Technology Services
Recent Major Upgrades
Graduate House
Swire Hall