以太网控制芯片RTL8019AS数据帧分析

以太网控制芯片RTL8019AS数据帧分析 以太网控制芯片RTL8019AS数据帧分析 2007NO.28 T???3 SCIFNCF??TECHNOLOGYINF??MAfION????M =??b?j??]h????RTL8019AS?????u].?? ??]V??=?TCP/IP???3?????&=????j(Int ernet)?V?7=1?y???N=b???'?F=?=????lInter net=C??????="=E?'??x??????????F?h?F?Fj??S ??tx?????Internet????j????l?????u?(?k ?Z=?PC?>62??x???62?E]????c?0?#?????8?F =i?????Z]h=?Internet?????l?7??60?????F?V x=Internet???l???????G?s?Fx?="?????162?? ???162:tZ???:/?1???G=>=?=???=!????]8?????F ?F?f]hx=?G?s?Fx=]??9????=?TCP/IP???y j??L?????3??=???????j????k?l60=??????? TCP/IP???y=??L???????l]6?N?????#???? =(???8=a?F=?=??;??=?]-?lInternet?.x????? ????????]h?????862=????lj?62?>???c?????? ??60 ????TCP/IP???y=??L????=E?1==?S=? =Ij?????????????:=?PC?>=>?d???Fj?=????8 ?(??PC?>??=?InternetI??=?PC?>??=}??+ ??=?:??=?=A?l?????G?#??:??=?????x????N?. ??(DSP).?(?l????]h??+m????]h????w. ?H?O??j??G?sx=???G=>?f????=}?v60 x??l?(?l????]h??+?j????]h?????yj? ?LTCP/IP??????j?Internet=??s?(???l?? ??jo?Sj??k???j?F?h?H?(???k???j??=?]6 Internet?????L.?l???????L=a?F???8???2?? ???????????G?k???j???????{?Lj?x:???? Internet??="=??h60?????{?L????????x??; ?3?;??]h?????j????]h???????G?F?????{?L?? ?????3?yj??L??????j??W??x?60?s???;=??d ?l???j????]h????RTL8019AS=>x??F????]. ???????{?L??????60 ?k???j?u?(???l=??b?j?8j??F??jo??=??b ?j???y=???. I=??b?j??=??b?j?????u =??b?j?3??=????S?k???j???l?????(?l ???(x??x???8it,.???8j???=c=??l?k???j (LAN)=a???l???#????????x????N?.????60 =??b?j?l=??????8="ful=?10-100Mbps???)?? x:?2x????O?F???????#??IOEaseT=??b?j?; ?Zj?x=?G?s62???????u=???IOMbps???)?? ?F?G=>???l??=>??????=??b?j???3.???(]h ?:?Q??x???=??????????l?(?l????=??x???? ?y?(x??F???*?u????60=??b?j???3??]V?l?k ??S9?7???0?>???S????90?F?G=>?k???j=??? ?8j?.?????????k???j=E??=E??=??b?j60 ???????l??=??bW1?8j???=?IEEES02.3 ?8j??F=??b?j=a?k?S????=??u=>??xV???yx: ???F=??u?O??????=???j?=??l=??W]?????]6?? ?????6???????????>=???]w??]6?????????3 ?,??????x???60??????=??b?j?????u??].?? ?3?yj??LTCP/IP????????A?k60 ?lIEEE802.3?8j?=a?F=??b?j???u?;=7?? ].???G:P????I?k?>?F??xV:????)m j?=a: ]V???2?;0,1????=??2???G?F??=??(?? ???8??x??????h?2?860IEEE802.3?u??]V ???2???l7=b????. ?u?????y?,(SOF),IEEE802.3?u=a???? ?y?????F=?=w=b??????=??21???*?F???>=??u ???&????60 ???8?????6?k???>???2?????h?u????x? ?????6?k?F?N????6=b????60j?=a?F???8?6?k ??=??3???k?F=???=??3?(??x:?2?1?????6?k60 ????/????:???l2=b?????F?8?????h???? ?????J?x??/???>?u??j??H??=?????=>??xV ??????????????60 ????;IEEE802.3?u?l??????=a?????h ??????=C?J?x?????y????60?????????????? ???L?Fx??u???}??????????]664=b???????? ?LZ{?F??=o??????=??.x(??]???j&???????F=? ??x???=b?u??????=Ex==?64=b????60 ?u?+?d??]9(FSC):????]9?O?p????=>4 =b??????????1Lx??+??Z{(CRC)?F?;???2???8 ????=??)?F?l???h????????????=??????u?lx: ?2???I=a?3?,?????x. RTL80I9AS?j????]h?????F???3=????? =?IEEE802.3?8j???=??b?j??]h????.??x:?S ???????{?L?,?T=??b?j?u?8j?60xQ?3???h?? ???????u??=E?3IEEE802.3=??b?j?u???u?Z ???F????x(?????????????O?,???????F?:?G?h ??????????????=?60=I??].??RTL8019AS ?j????]h?????????2?????u?????h?????u. ??lIEFE802.3?8j??u?{?L [-a!m ??.- M8#9FTallfh5idht6FX>1 }:PF-SD=?=IDA=E-4=???TY =?{?F{-??-F,6 ??2RTL8019AS???2?????u {?F??50}=?}60?&=?!??6F-FCS]. }wl-'*n*IB9tlkA????????=p{????????{?z??wvv)Ilm J!}:P??6=?{26Y62=?:600} ??3RTL8019AS???h?????u RSR}?F!?F?F{?F{62l60{PCs xx?hxL??=I=?=????? {1?F?F=?.60?F ?????6?k?{?6?k?)?????????T??=e??????]9 ??j??j?.1?Y ?? {1}}}{}26E146-15MI{ 2RTLOO19AS?j????]h?????????u 2.1RTL8019AS?j????]h???????? ?;???ORealtekj????)=???RTL8019AS =??b?j??]h???F?;?Zj?xP?????u??62x=j??? =??{?Fx?j??l?0?>=ClOMbps?j??=a???S???? ????x?.=}???u??(1)?,??Ethernet11=H lEEE802.3(l0Base5,lOBase2,1OBawT) ?8j?,(2)j??????F?h?????F????]6IOMbps???) ??,(3)j?W16KB??SRAM,?l???h???Aj??F?V x=??=}?N?.?????)?????J,(4)?3?28/16xV?? ???}??,8=b=a???[????=???16=b1/O??I?k ?S??60?'62?3?2UTP,AUl,BNC??]???x??F?? ?3?2??IOBaseT???j????????]????ux???Ill 2.2RTL8019AS???2?????u ???2?????u???{?L????260 ???2?????u???{?L?3802.3?8j??u???) ?Z??.j?=a?F]V????]962?u????xV62?u?+???? ]9?;??=???]???]?/x????F=H=C?J??=???j?60 ??=??????????O?????F??j????????6?k62???6 ?k62????????????????????60 2.3RT1,8019AS???h?????u ???h?????u???{?L????3, ?;????=??Ij??F?h]6?????J?O?{?L??=E?3 802.3?u???)?Z???F?3????3?k?>.?H?*?6?F RTL8019AS??]???]?=?.???h???262=I=??? ?8??62=??b?j?u????:e=S=b?????G??(j?4?? ??6I?F??=??o???G?????Rj???x?=???]??I?????? ???Fx???=?????=?=????V?T?x?F??x????????e ???FxQ?3??=S=b?????G??????x(??????=>?3?? ?2???????F?:?G?h??????????????=?60 3???????? =????2ARP?O=>x??F???I?h?????o ?????U??SCIENCE&TECHNOLOGYINFORMATION 7N0.SCIFNCF&TEOINOLOOYINFOFMAtION T???3 ??]??(x??????????????I=H???n ?A?? (?T????=(?u???????>=Hx????????T??230601) ????:?s??????=???]??(x??????????????I.=???=??s=S=???]??(x???????3=b=}?v?8j?W CDMA,CDMA2000??TD-SCDM=?. ????=??s??=???]??(x???????xP]?60??????]??(x????????b?????y=????n. j??u??:??]??(x?????3G4G =a??].????:TQ319.3???W?8???2:A?????1??1672-3791(200.7)09(b??0094-02 ????x???=?=(??2006??1?T20?????7?? 3G=S?u???&?8j?="=???:t=a???8j?.TD- SCDMA=>?Y???(x??y=(?8j??F?Y????3G?? ?????L?3]??Fj??Fj???=???=&??3G??j??+?R ??=????(??????60=?=o?33G?3G??j???=> 3rdGenerationMobileCommunications, =a???p=c?;?3?8?s=S=???]??(x?????.j?=? ?sj?=????????F?320=1??90??=?=aj?????=? ???????F?8???31979????=??Hj??????(x??? ??60 ADC(D-AMPS)?????s??JDC(???l?X?E=> PDC)?c??????]??(x?????60?l??=??????? ??=aGSM?????????R=?????601991??GSM ???????L?l?u?4??=1?F?j?????(???y60 GSM??????]??(x???????=??u?460???l 1982???F?u?4???Sj??u?+???0????]??????l?? ?i?Fx????9?u?(????NMT(?9?u??]??#??)?? ??????TACS(j???=??(x?????)???uj????N ??=???x???]?=(]?.??????=??????3??j??? ???F=E?????l???1x??l60=>=???x?j??u?4?? =?x??l??]??#???F????=???j?j???????,1982 ???F?9?u?????YCEPT(?u?4???#?y?B?ux()?? =?=?=?=?????=??F???J]h??900MHz??????j? j??u?4?#x?=(]????760?l???+?ux(=C?;?G?? =?=?=b?l?u?4?#x??8j???x((ETSI)???3???? x(F??:t??]???]p?L??(GroupSpecialMo bile)",????:tGSM"?F??]h???Sj????8j????? ??=?60 GSM?????Sj???????????:?4??????]? x?62?j?????L?u62?"?>???2?U??=6??62?( ???O??62?[???u?>=E?A???KxP?Fx??????* ?(???????Y62?"?>?9?#??x=60 5G 1?s=?=???]??(x????? 1974???F?e?f????????j?=??0????]??j ???????F?F??j????f]hj?AMPS(Advanced MobilePhoneService)=?=?1882???l???? ???L???i60?F=????)?F??????TACS(Total AccessCommunicationSystem)???9?u?? 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U ?? U n U ?!II U n U n U =X U C U :P U O U ?? U n U ?? :t 60 O D ?? U n U ?? U C ?? U e ?? :t U Jll U ?? .?? j .?? n U C =? ?f ?X . ?F ?F ?? ?? ?? n U :P j? . .:P n U j? ]I :P U :PL D n ?P ?? :e ?? :e ?? ?? ?? n U =X U ??U ?? n ?? d . Q a n n ?? ?> j? U C ?? ?? C ?F :P C n U e n U . 60 U d J ?d :Pd C U ab ?? ab 00 . ?? . n ?P J ?F ?? ?> r :PJ j? U ??J ?? n U ?????U??SCIENCE&TECHNOLOGYINFORMATION