1

1

1. digital 2

() 3 (HomeRF) (Bluetooth) (Wireless Fidelity : wi-fi) (HomeRF)HomeRF = Home Radio Frequency 2.4 GHz 1.6 Mbps 150

(Bluetooth) ISM(Industrail, Scientific, Medical) 2.4 10 Notebook , Notebook, Headset : (BWC : Body Wearable Computer) (Wireless Fidelity : wi-fi) (LAN : Local Area Network) Wireless LAN 50-100

2. (Wireless LAN) (Wireless LAN WLAN)

2.1 (Mobility)2.2 .. 1997 IEEE IEEE 802.11 2 /.. 1999 IEEE IEEE 802.11b 11 / 2.3 : PC Notebook Pocket PC PCMCIA : 802.11 Cisco, Orinoco, Toshiba, 3Com, Linksys (Access Point) : LAN :

2.4 Notebook Pocket PC : PCMCIA PC : PCMCIA PCI adapter Access Point Adapter 2.5 2 (Ad-Hoc) ( ) 2 (Access point) (Infrastructure) (Access point) 2.6 WPAN (Wireless Personal Area Network) 2 IR (Infra-Red) Bluetooth 3 10 WLAN (Wireless Local Area Network) WMAN (Wireless Metropolitan Area Network) WWAN (Wireless Wide Area Network) 2.7 (FireWall) (User Name and Password) WEP (wired equivalency privacy key) Wi-Fi Protected Access (WPA) WEP Network Adapter http://wordpress.comhttp://thitaporn.wordpress.com