Wi - Fi may provide hot coverage, low mobility and high speed of data transmission, wireless access and transmission with high speed is Wi - Fi technical main characteristics。 Domestic telecommunication, CNC, mobile are very concerned Wi - Fi technology development and application。 Based on the hotspot access service once considered the huge impact on 3G, but Wi - Fi technology transmission distance is short and signals penetrate the characteristics of poor ability also insurmountable。 

4。2。2 Wi - Fi technical superiority 

In recent years, the number of WAP at a rapid pace, wireless network convenience and efficient make its rapid popularization。 Whether wireless urban construction, or business unit of LAN opening, or mobile phones Wi - Fi function, all with Wi - Fi technical advantages of itself is not pided: 

1) wider LAN coverage 

Based on bluetooth radio coverage is very small, radius, and only about 15m Wi - Fi radius criterion of up to 100 m, can cover whole building office building, 

2) transmission speed 

Wi - Fi technology transmission is very fast, can achieve 11Mbps (802。11 b) or 54Mbps (802。11 a), suitable for high speed data transmission business; 

3) without wiring 

Wi - the main advantage lies in the Fi don't need wiring, need not suffer wiring condition limit, so very suitable for mobile office users needs。 At the airport, station, coffee shop, library such personnel more dense place Settings "hot spots", and through high-speed lines will Internet access these places。 Users will only support wireless LAN laptop or PDA get within the area, can high-speed access the Internet; 

4) health and safety 

The launch of IEEE802。11 provisions shall not exceed 100 power HaoWa, actual transmission power, about 60 ~ 70 HaoWa, and mobile transmission power about 200 HaoWa ~ 1 tile between handheld interphone, $5 watts。 Compared with the latter, Wi - Fi products of radiation smaller。 

5。 Conclusions 

Each kind of wireless communication has its distinctive place, ultra-wideband technology transfer rate is high, Wi - Fi technology bestrow scope。 As wireless communications technology development, people on high-speed short-range wireless communication request more and more high, ultra-wideband technology, Wi - Fi technology has broad prospects for development。

References论文网

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[3] Communications Week International, May 2001,pp 25-40 

[4] De Volkskrant, 30 March 2002 

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Nexis,  January 2002, 13-16 

[6] C。 Drury, Management Accounting, Chapman & Hall, London, 1995 

[7] Hugin, May 2001 

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[9] M。H。P。 Oremus, “Assessing the potential of public WiFi service access for the automotive area,” MBA Thesis, Rotterdam School of management, December 2002 

[10] Shell Press Service SI-PAM/3, Shell International B。V。, July 16  2002 

[11] “Swedish regulator invites companies to the WiFi beauty contest,” The Economist,  July 4th 2002