??????(WPAN)

1
???????

• ?8? ??????

2
???????

• ????????? ?
• ??????????? ?
• ??????????? ?

3
??????????
4
????????????
5
???????

• ????????????
• ??????????
• ????????
• ????????
• ????????
• ???????

6
?????????????

• ??????(WPAN)
• ?????? (WWAN, wireless wide area network)
• ?????? (WLAN, wireless local area network)
• ????????(Fixed Wireless)
• ???????(Protocols)

7
?????????

• ?????(radio frequency)
• ?? (laser)
• ??? (Infrared)
• ?? (Microwave)
• ??(Bluetooth)??
• ??????

8
?????????

• MTS (Mobile Telephone Service)
• IMTS(Improved Mobile Telephone Service)
• AMPS (Advanced Mobile Phone Service)
• MSAs (metropolitan statistical areas)?RSAs(rural
  service areas)

9
???????????
10
???????

• ??(Cell)????????,?????????(Base
  Station),???????????????
• ????(Switching Center)????????,????????????,??????
  ??

11
??????????????
12
????????????
13
?????
14
?????????
15
??????????
16
?????????

• ???(vertical)
• ???(horizontal)

17
????????(privacy)???(security)??

• ??(privacy)???(security)??
• ????(wireless viruses)???
• ????(cell phone)???
• ??????????
• IPSec??
• SSL (Secure Sockets Layer)

18
?????????

• ????????(fixed wireless communication)
• ????????(mobile wireless communication)
• ????????(optical wireless communication)

19
QA

• ????(cloned telephone)???????? ?
• ???????????