PON yog qhov luv ntawm kev ua haujlwm passive optical network, uas txhais tau tias lub network faib hluav taws xob tsis muaj cov khoom siv hluav taws xob thiab cov khoom siv hluav taws xob. ODN yog tsim ntawm cov khoom sib txig xws li splitter, thiab tsis xav tau cov khoom siv hluav taws xob nquag nquag. Lub tshuab hluav taws xob (passive optical network) muaj qhov kho qhov muag kab (OLT) tau nruab rau hauv nruab nrab tswj chaw nres tsheb thiab ib pawg txhawb kev kho qhov muag network (onus) ntsia ntawm tus neeg siv' s qhov chaw.
Lub chaw xa khoom hluav taws xob (ODN) ntawm OLT thiab ONU muaj cov khoom siv fiber ntau thiab passive splitter lossis coupler. GPON (Gigabit muaj peev xwm PON) thev naus laus zis yog qhov tseeb tshiab tshaj plaws broadband passive optical integrated nkag cov qauv raws ITU-TG. 984. X txuj. Nws muaj ntau yam zoo, xws li lub siab bandwidth, high efficiency, kev pab them nqi loj, tus neeg siv nplua nuj interface thiab lwm yam. Nws suav hais tias yog qhov thev naus laus zis zoo tshaj plaws rau qhov dav dav thiab kev hloov pauv ntawm kev nkag mus rau cov kev pabcuam network los ntawm cov neeg siv feem ntau.
Tus qauv PON
Tus PON system tus qauv yog suav nrog qhov kho qhov muag kab davhlau ya nyob twg (OLT) hauv chaw ua haujlwm hauv nruab nrab, chaw faib khoom hluav taws xob (ODN) muaj cov twj siv hluav taws xob passive, thiab kho qhov muag (network network / optical network terminal) (ONU / ont) ntawm cov neeg siv kawg. Qhov sib txawv yog tias ont tau ncaj qha rau ntawm tus neeg siv kawg, thaum nws muaj lwm cov tes hauj lwm (xws li Ethernet) thiab network koom nrog kev tswj hwm (EMS) ntawm ONU thiab cov neeg siv. Feem ntau, tsob ntoo topology qauv ntawm taw tes rau multipoint yog saws.
Nyob rau hauv cov kev taw qhia downlink, IP cov ntaub ntawv, lub suab, video thiab lwm yam kev pabcuam tau muab faib rau txhua ONU chav nyob ntawm PON los ntawm 1: n passive optical distributor hauv ODN los ntawm OLT hauv lub hauv paus chaw haujlwm. Nyob rau hauv cov kev taw qhia sab saum toj, cov ntaub ntawv kev pabcuam ntau ntawm txhua ONU txuas nrog tib lub fiber ntau los ntawm 1: n passive optical combiner hauv ODN, thiab thaum kawg xa mus rau OLT tus txais ntawm chaw ua haujlwm, uas zoo ib yam li kis- -tus qauv qauv.
Cov yam ntxwv ntawm PON
Qhov nyuaj ntawm PON dag nyob rau hauv cov teeb liab ua thev naus laus zis. Hauv qhov kev taw qhia downlink, cov teeb liab ntawm tus tes hloov mus rau txhua tus siv. Nyob rau hauv cov kev taw qhia sab saum toj, txhua ONU yuav tsum lees txais qee yam ntawm ntau yam kev nkag tau, xws li lub sijhawm faib ntau txoj haujlwm (TDMA) raws tu qauv kom ua tiav cov ntaub ntawv nkag mus rau cov xov tooj sib kis. Tam sim no, lub ntsiab ntawm PON thev naus laus zis siv rau kev siv dav dav yog EPON thiab GPON.
Qhov zoo ntawm PON system
1. Tus nqi hluav taws xob tsawg, kev saib xyuas yooj yim, yooj yim nthuav, yooj yim txhim kho. PON tus qauv tsis xav tau lub zog hluav taws xob thiab cov khoom siv hluav taws xob hauv kev xa khoom, yog li nws yooj yim kom nteg, hauv paus tsis xav tau kev txij nkawm, thiab txuag tau ntau lub sijhawm ntev ua haujlwm thiab tswj tus nqi
2. Passive optical network (PON) yog qhov nruab nrab nruab nrab, uas muaj peev xwm zam tag nrho kev cuam tshuam hluav taws xob thiab xob laim, thiab zoo heev rau kev siv hauv cov cheeb tsam uas muaj ntuj tsis zoo.
3. PON system siv cov khoom siv me me ntawm chav haujlwm hauv ib cheeb tsam, muaj kev pib nqis peev qis, nthuav kom yooj yim thiab rov qab los siab ntawm peev
4. Muab cov bandwidth siab heev. EPON tuaj yeem muab 1.25gb / s bandwidth symmetrical nce thiab nqis, thiab tuaj yeem hloov kho rau 10Gb / s nrog kev tsim kho ntawm Ethernet thev naus laus zis. GPON muaj txog li 2.5gb / s bandwidth.
5. Cov chaw pabcuam ntau. Raws li taw tes rau multipoint network, PON siv tus qauv kiv cua kom txuag tau cov khoom sib koom ua ke thiab pabcuam coob tus neeg siv. Txoj kev uas cov neeg siv khoom siv hauv chaw ua haujlwm thiab cov khoom siv fiber ntau tuaj yeem txuag cov neeg siv peev.
6. Kev faib tawm Bandwidth yog qhov hloov tau thiab cov kev pabcuam zoo (QoS). G / EPON muaj ib qho ua tiav rau bandwidth faib thiab lav. Yuav ua tiav cov neeg siv qib SLA.
PON system lees txais WDM (ntom ntom ntuag faib ua ntau yam sib xyaw ua ke) thev naus laus zis kom paub ib zaug xwb fiber ntau bidirectional kis.
Txhawm rau cais cov teeb liab los ntawm ntau tus neeg siv ntawm cov qub fiber ntau kho qhov muag, ob hauv qab no txuas mus rau kev siv tshuab tshiab:
Cov ntaub ntawv downlink ntws siv cov tshuab tshaj tawm;
1.TDMA thev naus laus zis tau saws rau uplink cov ntaub ntawv ntws.
2.Each PON chaw nres nkoj tuaj yeem ua tiav qhov chaw xa hluav taws xob ntau ntawm 1.25g hauv uplink thiab 2.5G hauv downlink
Cov txheej txheem tseem ceeb ntawm PON system muaj raws li hauv qab no:
Optical line davhlau ya nyob twg (OLT) cov cuab yeej ntawm chaw ua haujlwm kawg
ODN hais txog kev xa khoom hluav taws xob xaib siv los txuas OLT cov cuab yeej ntawm chaw ua haujlwm thiab ONU khoom siv ntawm cov chaw taws teeb kawg. ODN tsuas muaj cov khoom siv lossis chaw ua haujlwm passive
Chav kuaj hluav taws xob (ONU / ONT).
Davhlau kho qhov muag kab (OLT)
Txoj haujlwm ntawm kho qhov muag kab davhlau ya nyob twg (OLT) yog los muab qhov cuam tshuam kho qhov muag ntawm kev pabcuam network thiab ODN, thiab muab ntau txoj kev los xa cov kev pabcuam ntau yam. OLT yog cov tub ntxhais txheej, txheej kev pabcuam thiab cov txheej txheem sib xws. Cov kev pabcuam txheej tsuas yog muab cov kev pabcuam cov chaw nres nkoj los txhawb ntau yam; cov tub ntxhais txheej muab qhov kev sib txuas, kev sib txuam thiab cov kis; pej xeem txheej muab lub zog ua haujlwm, kev saib xyuas thiab tswj txoj haujlwm.
Lub hav zoov ntawm OLT tuaj yeem txo qhov txuas txuas ntawm cov txheej txheej sab saud network thiab cov cuab yeej siv nkag sab, xws li cov interface tshwj xeeb, cov kabmob txhais tau tias, kev sib tham hauv daim ntawv thiab cov cuab yeej tswj hwm, thiab tuaj yeem muab kev sib koom ua ke tswj ntawm kev siv network.
Lub luag haujlwm tseem ceeb ntawm OLT suav nrog kev faib ua haujlwm sib faib thiab DN kev ua haujlwm kom haum.
OLT kev pab cuam interface ua haujlwm muaj xws li: kev pabcuam chaw nres nkoj ua haujlwm, kev pabcuam cuam tshuam kev hloov kho, ua haujlwm lub suab sib tshuam, kev pabcuam cuam tshuam interface.
Cov dej num ntawm tsoomfwv ntawm OLT feem ntau suav nrog OAM ua haujlwm thiab muab hluav taws xob muaj nuj nqi.
Lub ntsiab noj ntawm lub zog kho qhov muag los ntawm OLT yog raws li nram no:
1. Kev faib tawm: qhov ntau dua ntawm cov neeg shunt, qhov poob ntau dua.
2. Optical fiber: qhov ntev qhov ntev, qhov ntau dua qhov poob.
3. ONU: qhov ntau ntawm tus lej onus, lub tshuab hluav taws xob ntau OLT yuav tsum. Txhawm rau kom ntseeg tau tias lub zog ntawm txhua ONU siab dua qhov tau txais qhov rhiab heev thiab muaj qee qhov kev npoo, pob nyiaj yuav tsum tau ua raws li cov lej thiab cov xa hluav taws xob.
Chav ntsuas kho qhov muag (ONU)
Chav ntsuas hluav taws xob (ONU) nyob nruab nrab ntawm ODN thiab cov cuab yeej siv, muab qhov kev sib tshuam ntawm cov neeg siv thiab ODN thiab kev siv hluav taws xob nrog rau tus neeg siv sab, kom paub txog kev ua thiab tswj kev tswj ntawm ntau lub teeb liab hluav taws xob. ONU muaj cov tub ntxhais txheej, txheej kev pab cuam thiab txheej pej xeem. Cov kev pabcuam txheej tsuas yog hais txog tus neeg siv chaw nres nkoj; tub ntxhais txheej muab multiplexing thiab optical interface; pej xeem txheej muab lub zog hluav taws xob thiab tswj kev tswj hwm.
ODN nyob nruab nrab ntawm ONU thiab OLT, muab kev xa xov hluav taws xob txhais tau tias rau OLT thiab ONU, ua tiav txoj haujlwm ua haujlwm ntawm cov teeb liab kho qhov muag kis thiab xa hluav taws xob.
ODN feem ntau muaj cov ceg ntoo ua qauv ntoo, uas feem ntau suav nrog cov khoom hauv qab no:
1. Lub chaw xa khoom hauv zos: cov xaib faib khoom kho qhov muag, thiab lwm yam
2. Optical faib cov chaw txiav txim siab: qhov chaw faib khoom kho qhov muag, lub thawv kev sib tshuam lub thawv, lub thawv kho qhov muag, lub thawv kho qhov muag, lub thawv kho qhov muag, thiab lwm yam
3. Optical tus neeg siv cov khoom siv nkag mus rau hauv cov chaw: kho qhov muag splitter, lub thawv hlov kho qhov muag, lub thawv txuas kev sib txuas lub thawv, thiab lwm yam
4. Tus neeg siv cov khoom siv davhlau ya nyob twg: tus neeg siv lub davhlau ya nyob twg lub thawv thiab cov xov tooj hluav taws xob cov ntaub ntawv
5. Lwm yam khoom siv yooj yim: kho qhov muag cable, kho qhov muag fiber ntau, pigtail, thiab lwm yam
Kev siv ntawm FTTH hauv PON
Raws li cov haujlwm sib txawv ntawm optical fiber mus txog ntawm tus neeg siv sab, daim ntawv thov cov qauv ntawm broadband optical nkag network muaj cov qauv hauv qab no, uas tau muab coj los hu ua FTTx, feem ntau suav nrog: fttn (fiber rau lub node), fttz (fiber ntau rau thaj chaw), fttcab (fiber ntau rau lub txee), FTTC (fiber ntau rau qhov ntug), FTTB (fiber rau lub tsev), FTTP (fiber ntau rau lub tsev ua haujlwm), FTTH (fiber rau lub txee) Tsev） 、 FTTO （Fiber Mus Rau Qhov Chaw Haujlwm
Ntawm lawv, FTTH, FTTB / C, fttcab yog cov ntawv thov tseem ceeb tshaj plaws. FTTH, FTTO thiab FTTP yog qhov zoo tshaj plaws broadband optical fiber ntau hom nkag mus
FTTH cov koom ua ke hauv lub network
Cov network zoo li cas ntawm FTTH yog muaj nyob hauv daim duab. Raws li qhov sib txawv ua lag luam xav tau ntawm cov neeg siv thiab cov xwm txheej xov hluav taws xob hauv tsev, lub network hauv tsev tuaj yeem txais cov qauv sib txawv hauv tsev, txawm yog wired lossis wired + wireless AP nkag hom, uas tuaj yeem yooj yim thiab yoog raws lub suab, cov ntaub ntawv dav dav, IPTV , WLAN thiab lwm yam kev pabcuam.
Yog tias koj xav tau dab tsi, koj tuaj yeem hu rau HTF Zoey.
tiv tauj ： support@htfuture.com
Skype ： sales5_ 1909 ， WeChat ： 16635025029
