Fiber rau Lub Tsev (FTTH) yog ib lub kaw lus uas teeb tsa fiber optics los ntawm ib qho chaw hauv nruab nrab ncaj qha mus rau hauv cov tsev ib leeg xws li cov tsev thiab cov chav tsev. Kev xa tawm FTTH tau dhau los ntev heev ua ntej cov neeg siv tau siv fiber optics es tsis yog tooj liab rau kev nkag mus rau hauv Is Taws Nem broadband.
Muaj ob txoj hauv kev yooj yim rau kev xa tawm lub network FTTH ceev ceev:cov tes hauj lwm optical uas nquag siv(AON) thiab tsis ua haujlwmcov tes hauj lwm kho qhov muag(PON).
Yog li AON thiab PON tes hauj lwm: qhov txawv yog dab tsi?
Lub network AON yog dab tsi?
Ib lub AON yog ib lub network architecture uas txhua tus neeg siv khoom muaj nws tus kheej txoj kab fiber optic uas xaus rau ntawm lub optical concentrator. Ib lub network AON muaj cov khoom siv hluav taws xob xws li routers lossis switching aggregators los tswj kev faib tawm teeb liab thiab kev taw qhia rau cov neeg siv khoom tshwj xeeb.
Cov khawm hloov pauv tau qhib thiab kaw ntau txoj hauv kev los coj cov teeb liab nkag thiab tawm mus rau qhov chaw tsim nyog. Lub network AON vam khom rau Ethernet thev naus laus zis ua rau kev sib koom tes ntawm cov neeg muab kev pabcuam yooj yim. Cov neeg sau npe tuaj yeem xaiv cov khoom siv kho vajtse uas muab cov ntaub ntawv tus nqi tsim nyog thiab nthuav dav raws li lawv cov kev xav tau nce ntxiv yam tsis tas yuav rov teeb tsa lub network. Txawm li cas los xij, AON networks xav tau tsawg kawg ib lub khawm hloov pauv rau ib tus neeg sau npe.
Lub network PON yog dab tsi?
Tsis zoo li AON networks, PON yog ib qho point-to-multipoint network architecture uas siv passive splitters los cais thiab sau cov teeb liab optical. Fiber splitters tso cai rau PON network los pab ntau tus neeg rau npe hauv ib lub fiber yam tsis tas yuav xa cov fibers sib cais ntawm lub hub thiab tus neeg siv kawg.
Raws li lub npe qhia, PON tes hauj lwm tsis suav nrog cov khoom siv hloov pauv motorized thiab sib koom cov fiber bundles rau qee qhov ntawm lub network. Cov khoom siv nquag tsuas yog xav tau ntawm qhov chaw thiab qhov kawg ntawm lub teeb liab.
Hauv ib lub network PON ib txwm muaj, PLC splitter yog qhov chaw tseem ceeb. Cov kais fiber optic muab ntau lub teeb liab optical sib xyaw ua ke rau hauv ib qho zis, lossis cov kais fiber optic coj ib qho kev nkag optical thiab faib rau ntau qhov zis ib tus zuj zus. Cov kais no rau PON yog bidirectional. Yuav kom meej meej, cov teeb liab fiber optic tuaj yeem xa mus rau hauv qab ntawm lub chaw ua haujlwm hauv nruab nrab kom tshaj tawm rau txhua tus neeg sau npe. Cov teeb liab los ntawm cov neeg sau npe tuaj yeem xa mus rau sab saud thiab ua ke rau hauv ib lub fiber los sib txuas lus nrog lub chaw ua haujlwm hauv nruab nrab.
AON vs PON Networks: Qhov sib txawv thiab kev xaiv
Ob lub PON thiab AON networks tsim cov fiber optic backbone ntawm FTTH system, tso cai rau tib neeg thiab cov lag luam nkag mus rau hauv Is Taws Nem. Ua ntej xaiv PON lossis AON, nws yog ib qho tseem ceeb kom nkag siab txog qhov sib txawv ntawm lawv.
Kev Faib Tawm Teeb Liab
Thaum nws los txog rau AON thiab PON networks, qhov sib txawv tseem ceeb ntawm lawv yog txoj kev uas lub teeb liab optical raug faib rau txhua tus neeg siv khoom hauv FTTH system. Hauv AON system, cov neeg rau npe muaj cov pob fiber tshwj xeeb, uas tso cai rau lawv nkag mus rau tib lub bandwidth, es tsis yog ib qho sib koom. Hauv PON network, cov neeg rau npe sib koom ib feem ntawm lub network fiber bundle hauv PON. Yog li ntawd, cov neeg siv PON kuj tseem yuav pom tias lawv lub system qeeb dua vim tias txhua tus neeg siv sib koom tib lub bandwidth. Yog tias muaj teeb meem tshwm sim hauv PON system, nws tuaj yeem nyuaj rau nrhiav qhov chaw ntawm qhov teeb meem.
Cov nqi
Tus nqi siv nyiaj ntau tshaj plaws hauv lub network yog tus nqi ntawm kev muab hluav taws xob rau cov khoom siv thiab kev saib xyuas. PON siv cov khoom siv passive uas xav tau kev saib xyuas tsawg dua thiab tsis muaj hluav taws xob ntau dua li lub network AON, uas yog lub network nquag. Yog li PON pheej yig dua li AON.
Kev Nrug Deb thiab Daim Ntawv Thov
AON tuaj yeem npog qhov deb txog li 90 kilometers, thaum PON feem ntau raug txwv los ntawm cov kab fiber optic cable ntev txog li 20 kilometers. Qhov no txhais tau tias cov neeg siv PON yuav tsum nyob ze rau lub teeb liab pib.
Ntxiv mus, yog tias nws cuam tshuam nrog ib daim ntawv thov lossis kev pabcuam tshwj xeeb, ntau lwm yam yuav tsum tau xav txog. Piv txwv li, yog tias RF thiab cov kev pabcuam video yuav tsum tau xa tawm, ces PON feem ntau yog tib qho kev daws teeb meem. Txawm li cas los xij, yog tias txhua qhov kev pabcuam yog raws li Internet Protocol, ces PON lossis AON yuav tsim nyog. Yog tias qhov deb ntev dua thiab muab lub zog thiab txias rau cov khoom siv hauv thaj teb tuaj yeem ua teeb meem, ces PON yuav yog qhov kev xaiv zoo tshaj plaws. Lossis, yog tias tus neeg siv khoom lub hom phiaj yog kev lag luam lossis qhov project cuam tshuam nrog ntau chav nyob, ces AON network yuav tsim nyog dua.
AON vs. PON Networks: Koj nyiam FTTH twg?
Thaum xaiv ntawm PON lossis AON, nws yog ib qho tseem ceeb uas yuav tsum xav txog seb cov kev pabcuam twg yuav xa mus rau hauv lub network, tag nrho cov topology ntawm lub network, thiab leej twg yog cov neeg siv khoom tseem ceeb. Ntau tus neeg teb xov tooj tau xa ntau yam kev sib xyaw ntawm ob lub network hauv ntau qhov xwm txheej sib txawv. Txawm li cas los xij, raws li qhov xav tau ntawm kev sib koom tes hauv network thiab kev nthuav dav txuas ntxiv mus, cov qauv network feem ntau yuav tso cai rau txhua lub fiber siv sib pauv hauv PON lossis AON daim ntawv thov kom tau raws li qhov xav tau ntawm cov kev xav tau yav tom ntej.
Lub sijhawm tshaj tawm: Lub Kaum Hli-24-2024