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Selection of WLAN for Schools in HK. Presented by: Mr. Ken K.K. Fon g B.Soc Sc (HKU), M.Sc. (I.M), MBA, MCIM, CM, MHKMA, MHKCS, Chartered IT Professional, Chartered Marketer Vice Chairman, Hong Kong Wireless Technology Industry Association (WTIA)

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Selection of wlan for schools in hk

Selection of WLAN for Schools in HK

Presented by:

Mr. Ken K.K. Fong B.Soc Sc (HKU), M.Sc. (I.M), MBA, MCIM, CM, MHKMA, MHKCS, Chartered IT Professional, Chartered Marketer

Vice Chairman, Hong Kong Wireless Technology Industry Association (WTIA)

Board Member, Radio Spectrum Advisory Committee, OFTA

CEO, Synergy Technology (Asia) Ltd

CIO, Fortune Telecom Holding Ltd.


Selection of wlan for schools in hk1

Selection of WLAN for Schools in HK


Introduction to WTIA

Introduction to Wireless Network

WLAN Frequency Spectrum Allocation

About WLAN and Wi-Fi Standard

WTIA agenda on EMB Measure

Tips on system, vendor and quotation selection

Objectives of wtia
Objectives of WTIA

Not-for-Profit Corporation registered in HK since 2001 with objectives:

  • To promote the development, usage and awareness of wireless technology applications in Hong Kong

  • To represent and safeguard the interests and opinions of the wireless technology to the Government and other international parties

  • To enhance communication and partnership between different types of companies in the wireless technology industry

Activities of wtia
Activities of WTIA

  • has over 100 local and overseas company members, including mobile network operators, mobile device manufacturers,wireless technology providers, system integrators, wireless applicationservices developers, consultancy firms, etc.

  • has organized different types of activities, including conference, seminar, workshop, competition, exhibition, etc. to accelerate the industry development.

  • Annual War Driving event (WLAN Security Survey)

  • manage the Wireless Development Centre (WDC) at Cyberport under the support of ITF fund

Selection of wlan for schools in hk3

Selection of WLAN for Schools in HK

Introduction to Wireless Network

Wireless network area definitions
Wireless Network Area Definitions

Courtesy of IEEE 802.15 Press Kit. Jan. 2001


















Selection of wlan for schools in hk

Wide Area

WAN:everywhere outside of the hotspots, where wireless Internet connection are provided


< 400 Kb/s – xx Mls, Kms

Metropolitan Area

MMDS; LMDS; 802.16

10M > 155 Mb/s - Kms

MAN:Building to Building connection

Local Area

802.11b; 802.11a; 802.11g

2M > 54Mb/s – > 300 ft, 100 m

LAN:collection of secure “hot spot” connections, providing broadband access to the Internet

Personal Area


< 800 Kb/s – < 30 ft, 10 m

PAN:collection of secure connections between devices in a “very” local area

Selection of wlan for schools in hk4

Selection of WLAN for Schools in HK

WLAN and RF Frequency Spectrum Allocation

The electromagnetic spectrum


US ISM: 902-928 MHz

2.4 – 2.4835 GHz

802.11b (11 Mbps)

802.11g (54 Mbps)

5 GHz

802.11a (54 Mbps)

The Electromagnetic Spectrum

Short Wave Radio

FM Broadcast

Infrared wireless LAN

AM Broadcast























Wlan the radio frequency spectrum
WLAN & the Radio-frequency Spectrum

  • 9 kilohertz and 300 gigahertz

  • Common Known RF Bands

    • FM Broadcasting: VHF

      • e.g. CR1 88.1;88.3;88.6 etc

    • Television: UHF

      • e.g. TV CH21 471.25(V)/477.25(S) MHz

    • Cellular/Mobile: 900MHz; 1800MHz

    • WLAN: 2.4GHz and 5Ghz

Standard and regulatory in hk
Standard and Regulatory in HK

  • IEEE Standards

    • 802.11b / 802.11g

      • 3 non overlapping channels in HK

      • 2.4-2.4835 GHz

    • 802.11a

      • 12 non overlapping channels in HK

      • 5.15-5.25 (4); 5.25-5.35 (4); 5.75-5.85 (4-5)

  • Worldwide Regulatory Progress

    • ITU World Radio Conference (WRC-03)

    • Agenda Item 1.5: set a global allocation: 5.15-5.35; 5.47-5.725

    • Total 455Mhz

    • Plus existing 5.75-5.85 > 580Mhz; i.e. 24 non-overlapping channel in 5GHz

5ghz spectrum and the 802 11a









5GHz Spectrum and the 802.11a

4 Ch

4 Ch

11 Ch

4 Ch


12 Channels

(*can use up to

6dBi gain antenna)








19 Channels

(*assumes no

antenna gain)



UNII-1: Indoor use, antenna must be fixed to the radio

UNII-2: Indoor/Outdoor use, fixed or remote antenna

UNII-3: Outdoor bridging only

*if you use a higher gain antenna, you must reduce the transmit power accordingly

Selection of wlan for schools in hk5

Selection of WLAN for Schools in HK

WTIA Agenda on EMB Measure

Wtia agenda on emb measure
WTIA Agenda on EMB Measure

  • of Improving School IT Infrastructure

  • Focus on WLAN infrastructure and applications

  • Lead by WTIA Professional Task Force

    • Dr. Raymond Sezto

    • Dr. H.C Lui

    • Mr. Jimmy Yeung

    • Mr. Ken Fong

    • Other Supporting Committee

Wtia agenda on emb measure1
WTIA Agenda on EMB Measure

  • With EMB

    • Focus Group Meeting with Pilot Schools (Oct. to Mid Nov.)

    • Site Survey and Findings with Pilot Schools ( Early Nov.)

    • 「資訊科技教育計劃」 Proposal Reviews / Advisory Services (End of Nov. to Mid of Dec.)

    • Project Terms, Specification and Implementation Plan Reviews and Advisory Services (to be announce)

Wtia agenda on emb measure2
WTIA Agenda on EMB Measure

  • With HKedcity

    • Mini WLAN Website

    • WLAN Forum and FAQ

    • WLAN Selection and Implementation Guideline for School

Wtia agenda on emb measure3
WTIA Agenda on EMB Measure

  • With eESIG and HKU SPACE

    • Technical Workshop on WLAN: standard, implementation and security

Focus group meeting
Focus Group Meeting

  • A Focus Group Meeting (25/10/2004) has been called by EMB and WTIA upon 9 Pilot Schools that has implemented WLAN during the past 2 years

Focus group meeting1
Focus Group Meeting

  • Interesting Findings

    • Have the right expectation of the WLAN functions, applications and coverage

    • Selecting a partner but not a vendor

    • Have a selection plan (Scorecard) for the system and partner

    • Plan for a whole coverage but can start with a smaller scale

    • A must for those open area group activities

    • Explore the true value, contents and killer applications of the WLAN

Focus group meeting2
Focus Group Meeting

  • Interesting Findings

    • Selecting Enterprise class network or small soho WLAN network

    • Choose the right standard (a, b or g?)

    • Cost is not the only selection factors

    • Don’t under-estimate the importance of privacy and Security Measure

    • Compatible with different brand and model

    • Site Survey is important

Selection of wlan for schools in hk6

Selection of WLAN for Schools in HK

Tips on system, vendor and quotation selection

Wlan selection criteria
WLAN Selection Criteria

  • Select the right standard and protect your investment: 802.11 a/b/g

  • Stable and able to work even in non-air conditioned environment

  • Good Performance for support of large numbers of simultaneous clients

  • Enough capacity and power for future upgrade

  • Good wireless coverage, enough radio output power and able to add external antenna

  • Powerful security

    • e.g. WPA2/IEEE 802.11i and proactive rogue AP and client detection

    • Support multiple VLAN

  • Quality of service for voice and video applications

    • IEEE 802.11e

  • Simple to deploy

    • e.g. Automatic channel selection, transmit power control for cell sizing

    • e.g. Support IEEE 802.3af POE

  • Centralized configuration and monitoring

  • Support WDS in case cable laying is not possible

Vendor selection criteria
Vendor Selection Criteria

  • Reputable and healthy financial background

  • Ability to provide total and turnkey solution

  • In business in the community for years

  • Depth of know how (both wireless/RF technology and education)

  • Employee Profiles

  • Size of Customer and References

  • Provide future upgrade path

  • Ensure it provide direct local service

  • Know the warranty period, warranty type, term and the rate

  • Provide good hotline support, speedy remote support and

  • Price and quality of the Site Survey/proposal/presentation material

Tips for the quotation
Tips for the quotation

  • Ask for a site visit and survey before quote

  • Give your detail expectation on the use and coverage and should provide your detail floor plan

  • Breakdown the cost into hardware, software, cabling, training and implementation

  • Preferable to ask them quote brand reliable name: Don’t let’s them fail you at critical time

  • Start to compare rate and negotiating

  • Compare between Quotation apple to apple

Tips for the quotation1
Tips for the quotation

  • Don’t just based on cost but also give score based on other selection factor

  • If there is big cost difference, discuss to make sure your understand them

  • Is your selected proposal meet your budget? Share with them at this point. But be realistic, “you get what you apy for”.

  • Ask for hidden or running cost. Best if they can provide you 3 years TCO.

For more information

For more Information

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