?11? ????????(fixed wireless)??

1
???????

• ?11? ????????(fixed wireless)??

2
???????

• ?????(fixed network) ?
• ???????????(fixed wireless)???
• ?????????????? ?

3
?????????
4
?????????(overlay network)? ?

• ??????????????(capacity demands)?
• ???????????????

5
LMDS?????

• Local
• Multipoint
• Distribution
• Service

6
LMDS?????
7
LMDS?????

• ??????????,?????????
• ????????,??????????????????
• ?????,??????????????
• LMDS????????????(scalable),?????????????????,?????
  ???????
• ?????????????????????????,LMDS???????CPE???,??????
  ?????????????
• ??????????????????

8
LMDS???

• ?????(interactive TV)
• ???????
• ????

9
MMDS?????

• ?????
• ??
• ?????(telecommuter)
• ?????(branch office)
• ??????

10
IEEE 802.11?????????(frame format)
11
???(access point)???(station)???????
12
??????????? (access point)
13
802.11???????

• ???(AP,access point)
• ???(mobile station)
• ????(wireless medium)
• ????(distribution system)

14
??802.11???????
15
??????San Hose???Wi-Fi hotspot????
16
?????

• 802.16????2001?12???,?????10-66 Ghz???wireless
  MANs
• WiMAX (802.16)?IEEE????????(fixed wireless
  broadband)??????
• 802.16e?802.20????????????????
• 802.16e???????2?6 GHz?????,802.20??????3.5 GHz??