ELE 2860 H. T. Tsui 1. The view of an H. K. Engineer 2 A case study.
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Transcript of ELE 2860 H. T. Tsui 1. The view of an H. K. Engineer 2 A case study.
Ranking on IT
• Singapore Taiwan Korea H.K.
Market 10 7 19 23
Infrastructure 13 19 25 18
Government 1 2 15 11
Application (CO) 7 18 12 15
Application ( P) 9 14 1 23
…..
Total 3 9 14 18
A case study: 3G Vs Wi Fi
• Wi Fi is a wireless technology which have a data rate 5 times that of 3G
• Advantages:• Based on technology in the public domain.• A Wi Fi access point (base station) cost US$ 70
( cellular one cost more than $ 50,000)
WI- FI (1)
In major cities, many hot spot access points
can be set up at low cost in cafés, airports,
stations.
Cheap: HK $ 3 per 10 minutes in Pacific
Cafes in H. K.• Access Points : 200 in H. K.• 5,000 in Seoul• Voice over IP
WI- FI (2)
• Wi-Fi enabled devices
Half the lap top sold have built in or
add on wi-fi
Even PDAs have this capability
if higher power is allowed. wi-fi can
have a range of 2.5 KM.
Hot spot can be extended to cover tall
building
WI- FI (3)
• Disadvantages Limited to within 100-300 meters from a hot spot (access point) 4W transmission power
The lab top using wi-fi is not allowed to be mobile Spectrum crowded: 2.4 giga hetz
Wi-fi service business is a low risk one
• For PCCW
• If it spend US $ 10 million, it can provide
service to 28 % of urban H.K. by 2011
It can break even by 2009
For a dominant fixed line player like PCCW,
wireless coverage is more simple. It can put
wi-fi access point atop existing cables
3G in danger
For a 3G operator
The cost for a network covering H.K. is
US $250 million + 6.4 millions annual
licence fee
Wi-fi development in US and Europe
• Wi-fi has developed as a community movement.• Wi-Fi normads without an account can have free
access
• People opening network to entire neighbourhoods, marking access points by chalk in front of wi-fi-enabled houses. This force many local businesses to offer free access too.