Kev siv EPON Technology hauv FTTx Access Network
EPON-based FTTx thev naus laus zis muaj qhov zoo ntawm bandwidth siab, muaj kev ntseeg siab, tsis tshua muaj nqi tu, thiab paub tab technology.Qhov thib ob, nws qhia txog cov qauv kev thov ntawm EPON hauv FTTx, thiab tom qab ntawd txheeb xyuas qhov tseem ceeb ntawm EPON thev naus laus zis hauv daim ntawv thov thiab tshuaj xyuas EPON.Qhov zoo yog tsom xam.Peb qhov teeb meem tseem ceeb ntawmOLTCov cuab yeej siv network tso, lub suab kev pabcuam kev sib txuas lus, thiab kev sib koom ua ke kev tswj hwm kev sib koom ua ke hauv EPON-based FTTx nkag network tau txheeb xyuas.
1, EPON daim ntawv thov scenario tsom xam
EPON thev naus laus zis tam sim no yog qhov tseem ceeb ntawm kev siv broadband optical nkag thiab FTTx.Xav txog cov yam ntxwv ntawm EPON thev naus laus zis, kev loj hlob, kev nqis peev, kev ua lag luam, kev sib tw ua lag luam thiab lwm yam, cov kev siv tseem ceeb ntawm EPON thev naus laus zis tuaj yeem muab faib ua hom hauv qab no:
FTTH (Fiber rau lub tsev), FTTD (Fiber rau lub Desktop), FTTB (Fiber rau lub tsev), FTTN/V, thiab lwm yam. Cov plaub hom yog mas manifested nyob rau hauv qhov sib txawv ntawm qhov kawg ntawm lub optical cable, qhov ntev ntawm kev nkag mus rau tooj liab cable, thiab qhov ntau ntawm cov neeg siv them los ntawm ib qho ntawm ib leeg, Txiav txim siab txoj haujlwm ntawm fiber ntau nkag thiabONUX in FTTx.Los ntawm kev xa tawm ntawm ntau yam FTTx kom ua tiav cov khoom siv fiber ntau, lub hom phiaj kawg ntawm FTTH los txhawb kev kho qhov muag fiber ntau rau hauv tsev, FTTB / FTTN yog qhov kev siv nyiaj txiag ntau dua nyob rau theem no.
EPON siv Ethernet raws li tus neeg nqa khoom, txais yuav taw tes rau ntau qhov qauv thiab passive optical fiber kis hom.Tus nqi downlink tuaj yeem ncav cuag 10Gbit / s tam sim no, thiab uplink xa cov ntaub ntawv ntws hauv daim ntawv tawg Ethernet pob ntawv.Tam sim no, EPON Technology tau siv dav hauv txhua yam ntawm "optical hauv tooj liab tawm" kev tsim kho ntawm cov neeg ua haujlwm.Los ntawm qhov kev xav ntawm lub sijhawm ntev FTTx network evolution, cov tsos ntawm 10G EPON Technology kuj muab cov kev daws teeb meem zoo dua rau cov neeg ua haujlwm 'FTTx network smooth upgrading.
FTTx siv cov khoom siv kho qhov muag los ua qhov nruab nrab kis tau tus mob, uas muaj qhov zoo ntawm kev sib kis loj, kev ua haujlwm siab, kev ntseeg siab, kev sib kis ntev, thiab kev cuam tshuam los tiv thaiv hluav taws xob.Nws yog txoj kev loj hlob ntawm kev siv broadband.
(1) FTTH txoj kev
FTTH, los yog fiber-to-the-tsev txoj kev, yog haum rau cov cheeb tsam uas cov neeg siv nyob sib txawv, xws li villas, qhov twg cov neeg siv muaj ntau dua cov kev xav tau ntawm bandwidth, thiab cov neeg tsim khoom tau koom tes nrog kev tsim kho network.FTTH paub txog "txhua qhov kev siv kho qhov muag, tsis muaj tooj liab nyob rau hauv tag nrho cov txheej txheem. "Ib lub node sib raug rau ib tus neeg siv.Tus neeg siv tau txais lub zog bandwidth thiab lub peev xwm ua lag luam, tab sis tus nqi tsim kho kuj tseem siab.
(2) FTTD txoj kev
FTTD txoj kev tsim nyog rau cov xwm txheej uas cov tsev ua haujlwm high-end thiab lwm cov neeg siv yog cov concentrated thiab xav tau cov bandwidth siab, thiab nws kuj yog qhov tsim nyog rau cov xwm txheej uas cov kev pabcuam siab-bandwidth xws li IPTV tau tsim nyob rau hauv cov chaw nyob tuab.Txoj kev sib txuas lus dav dav yog rub tawm cov kab hluav taws xob kho qhov muag los ntawm OLT ntawm lub chaw ua haujlwm hauv nruab nrab mus rau lub tsev, tso qhov muag qhov muag rau hauv chav xa khoom lossis txoj hauv kev ntawm lub tsev, thiab txuas mus rau tus neeg siv lub desktop los ntawm lub tsev kho qhov muag cable lossis poob. cable.Nyob rau hauv cov ntaub ntawv no, nws yog tsim nyog los xaiv seb puas yuav muab lub optical splitter nyob rau hauv txoj kev hauv tsev los yog nyob rau hauv lub handover chav tsev raws li kev siv ntawm cov neeg siv.Nyob rau tib lub sijhawm, xav txog qhov yooj yim ntawm kev teeb tsa, kev sib txuas tshuab txias yuav tsum tau siv ntau li ntau tau thaum txhim khoONUntawm tus neeg siv sab.
(3) FTTB txoj kev
Txoj kev FTTB yog qhov tsim nyog rau cov xwm txheej uas cov txheeb ze ntawm cov neeg siv hauv ib lub tsev lag luam me me thiab cov kev xav tau bandwidth tsis siab.FTTB paub txog "fiber rau lub tsev, tooj liab tsis tawm hauv lub tsev".Los ntawm cov node, kev lag luam xav tau ntawm txhua tus neeg siv hauv lub tsev tau them, thiab cov neeg siv nkag mus rau bandwidth thiab kev ua lag luam muaj peev xwm tseem nyob siab heev, nws yog cov kev daws teeb meem tseem ceeb rau cov zej zog tsim tshiab;
(4) FTTN/V txoj kev
FTTN/V yog qhov tseem ceeb "fiber rau zej zog (lub zos), tooj liab tsis tuaj yeem tawm hauv zej zog (lub zos)", tus neeg teb xov tooj xa cov fiber ntau optic hauv zej zog (lub zos), thiab nruab ib qho me me lossis txawm tias tsuas yog cov nodes hauv lub computer chav lossis sab nraum zoov txee ntawm lub zej zog (lub zos), kom ua tiav kev lag luam kev pab cuam rau cov neeg siv nyob rau hauv tag nrho cov zej zog (lub zos), thiab nws cov kev siv bandwidth thiab kev lag luam muaj peev xwm kuj tsis muaj zog.Nws yog qhov kev daws teeb meem tseem ceeb rau kev tsim kho hauv nroog thiab nyob deb nroog "optical tooj liab rov qab".
Cov qauv sib txawv sib txawv ncaj qha cuam tshuam rau kev tsim kho ntawm ODN thiab cov chaw ntawm PON system network ntsiab.Hom kev sib txuas tsim nyog yuav tsum raug xaiv raws li qhov xav tau tiag tiag.FTTx network platform sib koom los ntawm ntau tus neeg siv khoom thiab ntau yam FTTx networking daim ntawv thov hom tuaj yeem teeb tsa hauv ntau cheeb tsam.
2, Teeb meem tsom xam ntawm EPON hauv daim ntawv thov
2.1 Cov ntsiab lus tseem ceeb ntawm EPON hauv kev npaj ua haujlwm
EPON feem ntau txiav txim siab 4 yam hauv kev npaj ua haujlwm: kev npaj kho qhov muag cable network,OLTinstallation qhov chaw, optical splitter installation qhov chaw, thiab ONU hom.
Txoj kev npaj ntawm qhov kho qhov muag cable, txoj kev nkag mus rau hauv tsev, thiab kev xaiv ntawm optical cable / fiber ntau yog cov teeb meem tseem ceeb tshaj plaws hauv EPON kev sib txuas lus, uas yuav cuam tshuam ncaj qha rau tag nrho cov peev txheej, kev siv hluav taws xob kho qhov muag, cov khoom siv thiab cov kav dej. kev siv.Kev siv PON thev naus laus zis ua rau muaj kev xav tau siab ntawm cov neeg siv tam sim no kho qhov muag cable network networking hom, tshwj xeeb tshaj yog nyob rau hauv kev teeb tsa ntawm cov neeg siv kho qhov muag cables hauv lub xov tooj ntawm tes.Yog hais tias ib tug fiber optic cable yog cais deployed rau txhua tus neeg siv, ib tug loj tus naj npawb ntawm fiber optic cables yuav tsum tau nyob rau hauv lub cell, uas yuav siv tau ib tug loj npaum li cas ntawm cov kav dej nyob rau hauv lub cell, uas ua rau ib tug nce nyob rau hauv tus nqi ntawm ib tug neeg siv.Yog li ntawd, nws yog ib qho tsim nyog yuav tsum tau ua txoj haujlwm zoo hauv kev npaj cov neeg siv khoom siv kho qhov muag cable network nyob rau theem pib ntawm kev tsim kho, suav nrog cov pob txha kho qhov muag cable routing, core tooj, thiab lwm yam, kom tsis txhob nkim cov peev txheej ntau li ntau tau.
Qhov kev tso kawm ntawm OLT thiab splitter yuav cuam tshuam zoo rau kev teeb tsa thiab kev nqis peev ntawm cov khoom siv kho qhov muag cable.Piv txwv li, OLT xa tawm ntawm lub chaw ua haujlwm hauv nruab nrab yuav tuav ib feem ntawm lub caj qaum kho qhov muag cable, thiab kev xa tawm hauv zej zog raug txwv los ntawm cov chaw ua haujlwm hauv chav ua haujlwm thiab cov nqi txhawb nqa.Thaum pib ntawm txoj kev loj hlob, nws raug nquahu kom xa OLT ntawm lub hauv paus. chaw ua haujlwm.Thaum xaiv qhov chaw ntawm txhua lub cuab yeej, kev faib tawm ntawm cov neeg siv hauv lub xov tooj ntawm tes thiab cov kev cai bandwidth ntawm cov neeg siv sib txawv yuav tsum raug txiav txim siab tib lub sijhawm, thiab cov neeg siv tuab thiab pawg neeg siv dispersed yuav tsum tau kho nyias.
Hom ONU yuav tsum raug xaiv ua ke nrog cov kab teeb tsa hauv thaj chaw nkag.ONUs feem ntau suav nrog POS + DSL thiab POS + LAN.Piv txwv li, thaum lub tsev xaim hauv zej zog tsuas yog muaj kev sib tw, ONU yuav siv POS + DSL, suab Access los ntawm softswitch, broadband nkag los ntawm ADSL/VDSL;thaum tsim cov kab hluav taws xob hauv lub zej zog tau txais Qeb 5 kev thaiv,ONUyuav siv cov khoom siv POS + LAN, thiab rau cov tsev ua haujlwm, chav nyob, thiab cov chaw ua si nrog kev sib txuas, ONUs yuav siv cov khoom siv nrog LAN interface.
Hauv kev tsim qauv engineering, qhov siab tshaj plaws attenuation tus nqi hauv ODN yuav tsum tau tswj, thiab nws raug pom zoo kom tswj tsis pub dhau 26dB.
2.2 Nta ntawm EPON hauv FTTX networking
Piv nrog rau kev siv thev naus laus zis niaj hnub, FTTx cov cuab yeej ua kom paub tab raws li EPON muaj qhov zoo hauv qab no:
(1) Cov cuab yeej siv tau yooj yim, tus nqi qis, thiab cov kev pabcuam IP tuaj yeem xa mus tau zoo, uas yog qhov tsim nyog rau kev hloov pauv sai thiab xa mus rau cov kev pabcuam sai.EPON yog yooj yim los tsim.ODN raug xa mus rau hauv lub tsev, thiab ONUs raug xa mus rau ntawm tus neeg siv sab los muab ntau yam kev pabcuam.Lub sij hawm tsim kho yog luv luv thiab kev pab cuam xa tawm yooj yim thiab hloov tau.
(2) Hauv qhov system, tsis tas yuav teeb tsa cov cuab yeej siv niaj hnub nruab nrab ntawm lub hauv paus chaw ua haujlwm thiab cov neeg siv thaj chaw, txuag kev tsim kho ntawm chav computer.ODN yog ib qho khoom siv passive.Nws yog qhov yooj yim dua los nrhiav qhov chaw tsim kho ntawm ODN hauv lub tsev, uas txo cov nqi ntawm kev tsim kho, kev xauj tsev thiab kev saib xyuas ntawm chav tsev computer.
(3) Lub network yog kev lag luam thiab txuag cov nqi tsim kho network.FTTx network txais cov qauv taw tes-rau-multipoint, uas txuag tau ntau tus neeg siv cov pob txha fiber ntau.Lub fiber ntau ceev tuaj yeem pab ntau tus neeg siv tib lub sijhawm, uas ua rau muaj txiaj ntsig zoo rau kev rov qab los ntawm kev nqis peev hauv kev tsim kho network.
(4) Yooj yim tswj thiab tswj.Muaj EPON kev tswj hwm kev sib koom ua ke ntawm lub hauv paus chaw ua haujlwm, uas tuaj yeem tswj hwm tus neeg siv-sab ONU, uas yooj yim rau kev tswj thiab tswj dua li HDSL modem lossis optical modem.
3. Cov lus xaus
Nyob rau hauv luv luv, cov neeg tsav tsheb tab tom ntsib kev sib tw loj heev.Hauv kev nkag mus rau hauv kev tes hauj lwm, tsuas yog thaum cov neeg ua haujlwm xaiv txoj kev nkag mus kom raug lawv tuaj yeem lav tag nrho cov kev txaus siab ntawm cov neeg ua haujlwm thiab ua tau raws li qhov xav tau ntawm kev lag luam hloov pauv mus tas li.Lub EPON system yog kev siv tshuab tshiab rau lub neej yav tom ntej.EPON system yog lub platform ntau qhov kev pabcuam thiab yog qhov kev xaiv zoo rau kev hloov mus rau tag nrho-IP network.EPON tuaj yeem muab kev kub ceev, txhim khu kev qha, ntau qhov kev pabcuam thiab tswj tau cov kev pabcuam nkag tau ntawm tus nqi qis, uas yog qhov ua kom pom tseeb thiab lav tus nqi rau cov neeg siv thiab cov neeg siv.