Nrog rau txoj kev loj hlob ntawm kev lag luam thiab kev vam meej, tib neeg tau sib sau ua ke ntau thiab ntau dua rau pej xeem.Nyob rau tib lub sijhawm, kev puas tsuaj rau pej xeem kev ruaj ntseg kuj ua rau muaj kev nyuaj siab loj rau kev sib haum xeeb hauv zej zog.Lub Koob Yees Duab thiab Kev Tshawb Fawb tuaj yeem muab kev saib xyuas video hauv lub sijhawm tiag tiag thiab kev kaw cov yeeb yaj kiab, muab lub hauv paus tseem ceeb rau kev sau cov ntaub ntawv pov thawj tom qab.Qhov kev loj hlob sai ntawm Lub Koob Yees Duab thiab Kev Tshawb Fawb tau muab txoj hauv kev zoo rau kev tsim kho "lub nroog sib haum xeeb".Cov ntaub ntawv sau los ntawm Cov duab sau cov ntsiab lus muab faib rau hauv Lub Koob Yees Duab thiab Kev Tshawb Fawb yuav tsum tau xa mus rau lub server hauv lub sijhawm tiag tiag rau kev saib, tshuaj xyuas thiab cov ntsiab lus.Data kis tau tus mob network yog qhov nyuaj rau kev tsim kho hauv nroog saib xyuas thiab tswb network, thiab lub luag haujlwm tseem ceeb ntawm Cov txheej txheem xa cov ntaub ntawv tau dhau los ua qhov tseem ceeb.EPON, uas tuaj yeem muab kev nkag siab bandwidth, tau dhau los ua cov thev naus laus zis tseem ceeb uas nws txoj kev lag luam loj siv nyob ntawm.
Nrog rau kev txhim kho kev sib txuas lus thev naus laus zis, EPON thev naus laus zis tau maj mam nkag mus rau hauv kev saib xyuas kev ruaj ntseg.Nws yog bandwidth access technology ntawm point-to-multipoint network qauv thiab passive optical fiber kis hom.
Tam sim no, qhov zoo ntawm EPON thev naus laus zis tau maj mam xav txog, tshwj xeeb tshaj yog hauv Daim Ntawv Thov Koob Yees Duab thiab Saib Xyuas.Thaum EPON tau siv rau kev saib xyuas lub network, nws tuaj yeem muab kev ua si tag nrho rau nws qhov zoo ntawm qhov siab bandwidth thaum daws qhov yooj yim cov ntaub ntawv video xa tawm ntawm tus nqi qis, thiab nws cov yam ntxwv yooj yim thiab hloov tau zoo tuaj yeem txo tus nqi tag nrho thiab kev saib xyuas ntawm lub network. .
EPON network muaj qhov zoo hauv qab no:
1. Kev ntseeg siab.EPON yog ib qho splitter thiab optical fiber.Nws muaj lub neej ua haujlwm ntev thiab tsis muaj cov khoom siv ua haujlwm.Nws zam lub zog tsis ua haujlwm, xob laim tawm tsam, overcurrent thiab overvoltage puas, thiab lwm yam. Lub network muaj kev ntseeg siab thiab txo cov nqi kho.
2. tus nqi qis.EPON thev naus laus zis rau ib leeg-ntxhais fiber ntau kis tau tus mob, txuag ib nrab ntawm cov fiber ntau dua li kev sib kis ntawm fiber ntau.Tsis tas li ntawd, EPON tsis tas yuav muaj hluav taws xob sab nraud thaum lub sij hawm kis tau tus mob, yooj yim rau nteg, thiab qhov pib yuav tsum tsis muaj kev saib xyuas, uas tuaj yeem txuag cov nqi khiav lag luam thiab cov nqi tswj.
3.High bandwidth.1Gmps symmetric kis tau tus mob, tuaj yeem yooj yim ua tau raws li cov kev cai ntawm kev saib xyuas video.Lub bandwidth ntawm txhua ONU tuaj yeem hloov kho qhov nruab nrab ntawm 2M thiab 1Gmps.Qhov nruab nrab nruab nrab bandwidth ntawm OLT chaw nres nkoj hauv txhua ONU yog li 30M, uas ua tau raws li IPTV cov cai.
4.EPON muaj tus nqi siab ua haujlwm thiab EPON ceev tuaj yeem ncav cuag tib lub siab bandwidth ntawm cov dej ntws thiab nqes qis ntawm 1.25Gb / s.Qhov siab tshaj plaws ceev tuaj yeem ncav cuag 10Gb / s, qhov siab tshaj plaws kis tau tus mob mus txog 20km, uas yog qhov haum rau cov kev pab them nqi ntawm cheeb tsam cheeb tsam network, thiab pib npog thaj tsam ntawm qhov nruab nrab.
5.Qhov kev sib txuas yog hloov tau, thiab qhov siab tshaj plaws optical split piv yog 1:64.Cov ntoo-zoo li lub network qauv yog saws los tsim ib qho point-to-multipoint neeg siv network topology los ntawm kev sib xyaw ntawm cov sib txawv optical splitters.Los ntawm qhov tsim nyog network npaj thiab tsim, cov peev txheej fiber ntau tuaj yeem txuag tau qhov kawg.Nws yog ib qho kev daws teeb meem zoo rau cov duab sau thiab dispersion.
EPON Technology Txoj Cai
EPON (Ethernet Passive Optical Network) Ethernet passive optical network yog cov khoom lag luam ntawm kev ua ke zoo tshaj plaws ntawm Ethernet thev naus laus zis thiab PON thev naus laus zis.
Txhawm rau cais cov teeb liab hauv kev sib kis thiab kev txais tos ntawm ntau tus neeg siv ntawm tib lub fiber ntau, ob txoj kev siv thev naus laus zis hauv qab no tau txais kev pom zoo: cov ntaub ntawv downlink tau txais kev tshaj tawm thev naus laus zis, thiab cov ntaub ntawv uplink tau txais TDMA thev naus laus zis.
EPON daim ntawv thov hauv Lub Koob Yees Duab thiab kev soj ntsuam
EPON thev naus laus zis yog tus cwj pwm los ntawm kev siv bandwidth siab, kev ruaj ntseg siab thiab kev siv siab ntawm cov peev txheej.Cov thev naus laus zis no muaj qhov zoo rau kev saib xyuas hauv tsev kawm ntawv. Ua ntej, kev saib xyuas hauv tsev kawm ntawv yuav tsum muaj kev kub ceev, zoo tshaj plaws ntiag tug network ib puag ncig los nqa nws cov kev pabcuam video zoo.EPON thev naus laus zis muab uplink thiab downlink symmetric 1Gbps bandwidth, uas tuaj yeem ua tau raws li qhov xav tau. Cov kev xav tau ntawm cov kev pabcuam video.Qhov thib ob, EPON qhov hloov pauv ntawm cov qauv topological maximally saib xyuas cov txheej txheem tawg ntawm lub tiaj ua si.Txawm hais tias nws yog ib pawg tuab ntawm cov vaj tse lossis ib txoj kev sib cais, nws tuaj yeem haum nrog lub network tsim nyog. Thaum kawg, kev ruaj ntseg thiab ruaj khov. ntawm EPON kuj nce qib kev nkag mus siv thev naus laus zis ntawm kev saib xyuas chaw ua si mus rau qib tshiab.
Thaum xav tau cov ntsiab lus tseem ceeb hauv qhov chaw ua si, EPON tuaj yeem txais kev sib txuas lus zoo.Ib qho PON chaw nres nkoj ntawm OLT cov cuab yeej txuas nrog 1: N spectrometer.Tom qab ncav cuag qhov chaw kho qhov muag pem hauv ntej, ntau ONU cov cuab yeej txuas nrog.Ua kom zoo dua ntawm qhov ntev ntawm cov khoom siv fiber ntau kis tau tus mob, txuas mus rau txhua qhov yuav tsum tau muab tso rau hauv cheeb tsam.Cov khoom siv fiber ntau tuaj yeem khaws cia rau tom qab nthuav dav nkag.
Kev saib xyuas ntawm txoj kev nyob ib puag ncig tuaj yeem ua tiav hauv txoj kev zigzzagging los txuas txoj kev saib xyuas cov ntsiab lus hauv series.In ib cheeb tsam me me, EPON nrog qhov ntev ntawm 20KM tuaj yeem muab kev nkag tau.Hauv thaj chaw loj, ntau txoj kev tuaj yeem siv los daws qhov teeb meem nyob deb.