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2004??11??16??

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??????????????????????????CDMA2000 1xEV-DO
"Revision A"


??2004??11??16???????????????????????????????????????????ü??????й?????????????????????????????????й?Irwin Mark Jacobs?????????????????????????????Э?飬?????????????????????????????????CDMA2000 1xEV-DO "Revision A"????????????

??????????κ??????Э?飬?????????????????????"Revision A"????????????EV-DO???????????????Revision A????CDMA(Code Division Multiple Access)??????????????????????????CDMA2000 1xEV-DO????????????????????????鲥????????????????????2005????????????

????Revision A??2004??????????????????????????????????2.4Mbit/s??????????????????3.1Mbit/s??????????鲥????????????????(QoS)????????????????????????????????????????????????????????绰?????????????????????????

????????1996??12???????????????????й?CDMA???????????????????????1997??10?????????????й????????????????2000 ??1????????????????????CDMA 1xEV-DO?????HDR(High Data Rate)??????????????????к????????

???????????KDDI?????2000??7??????е?CDMA2000 1xEV-DO???????????????????????????÷???EV-DO?????????????????????EV-DO????All IP??????????·????????????????????????????????硣?????豸?????EV-DO?????????????????????????????????????????????????豸?????????????????EV-DO?????????????????趨??????????????

??????????????????????Revision A??EV-DO???????????????????????PDSN(Packet Data Serving Node)???????豸?????????????????豸??????????????????????????????

???????????????г?????δ???????????????????????????????

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  1. CDMA2000 1xEV-DO???????????????????????????????????CDMA????????????????????KDDI?????2003??10????2GHz??ο?????÷????2003??11????800MHz??ο?????÷???
  2. ?鲥(multicast)????????????????????????????????????
  3. QoS(Quality of Service)??????????????????????????????????????????????????
  4. HDR(High Data Rate)?????????????????????????????????????
  5. All IP???????豸?????IP????????????????????

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

????????????????????????????????????(TSE:6501/NYSE:HIT)λ???????????????????????356,000???2005????????94,640?????($80.9billion)????????????????????????????????????????????а??????????????????豸??????/??????????????/????????????????????????????????????????????????????????????????()??

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??????????????(www.qualcomm.com)????CDMA??????????????????????????????????????????????????????????????????????????????????????????????У??????????????500??????????ù????2003???500????????????????г?????QCOM??????????н????

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?绰??
010-65908135
E-mail??
yshen@hitachi.cn / slliu@hitachi.cn

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100022
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?绰??
010-84584750-238/235
E-mail??
xfjiang@webershandwick.com / ssun@webershandwick.com

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