?????ü

?????

????????

2006??11??16??
???????й?????????

??????EV-DO
???????????2006??3G???й?????????????


??2006??11??16???????????????????????????????????????糤?????????????????????????EV-DO???????δ????????????????2006??3G???й????????????????????EV-DO???????????????????????????????????????????????????

??????3G???й???????????й??????????????о??????????????????????????????????й????????????????????????????????????????????????????????Χ???????й?????????????????????????????????滮???????з??????????????????????????????????????????????????????????????????????????3G??????????????????????????????????????飬??3Gδ??????????????????????

???????????????????????????????????????3GPP2??EV-DO????????????????????????????CDMA 2000 1x EV-DO ???????????VoIP??QoS??A?汾, ??????????????B?汾???????????MIMO/SDMA/OFDMA??C?汾??

???????????????????????????????????????????????????????????·??????????????????????????????????????????????????????????????????OFDM?????????????????????????????????????????????????????????????????????????????????????????????????????????

????EV-DO??δ???????????????????С?????????????????????????????磬????????????л?????????????????WiMAX??W- CDMA??WiFi????????л???????????MMD B?汾??????????PCRF????????????????????MMD????????QoS???????????????????е???????????????????????????

???????????????????????CTIA????У????????????????????????3G/WLAN????л?????????????á?

?????????????EV-DO??????????е?1xRTT???磬A?汾?е???AP???????????????С??AP??????????е?CR??BSC??PDSN???豸????Щ??????????????????????????????????????????

???????????????????й???????????????顱????????????????????????????飬??й???????????????????????

????3GPP2

????3GPP??????????????????????????3G?????淶??????????????????2G???絽3G????????????????δ?????????????????????????????????????κ????????й????????????(CWTS)??1999?????3GPP??
????3GPP2??????????????ANSI-41?????????????cdma2000??????????????????淶?????????1999??1????????????? TIA???????ARIB???????TTC????????TTA????????????????й???????????о???(CWTS)??1999??6???????????????? 3GPP2?????????????????????????????CDMA2000??????????????顣?й????????Э??(CCSA)??????CWTS??3GPP2?????????????CCSA??

????CDMA2000 1x EV-DO

????1x EV???????"Evolution"???????????????DO??????Data Only????????????????????????????壬??Data Only???Data Optimized?????EV-DO???????CDMA2000 1x???????????????????????Ч???????Σ???2001??12????ITU????????CDMA2000 1x EV-DO???????CDMA2000??????????????????IMT-2000???????

????????????

????????????????????????????????????(TSE:6501/NYSE:HIT)λ???????????????????????356,000???2005????????94,648?????($80.9billion)????????????????????????????????????????????а??????????????????豸??????/??????????????/????????????????????????????????????????????????????????????????()??

???緽?

???????й????????? ???????????/?г????

??????
????
?????
?????г?????????????·5?? ???????????19??1910??
???
100004
?绰??
(8610)6539-9236
E-mail??
yshen@hitachi.cn

???????????

??????
????/???
???
100738
?????
?????ж?????????????1?? ????????????ó????W1??902??
?绰??
(8610)8518-5208-30/27
E-mail??
wuyu@prap.com.cn / df@prap.com.cn

???? Adobe(R) Reader(TM)????PDF?????????????Adobe Systems Incorporated(Adobe Systems???)??Adobe(R) Reader(TM)??

???????????????????

XML 地图 | Sitemap 地图