Ua ib tiam tshiab ntawm kev siv tshuab fiber ntau optical, XPON muaj qhov zoo heev hauv kev tiv thaiv kev cuam tshuam, cov yam ntxwv bandwidth, qhov deb ntawm kev nkag mus, kev saib xyuas thiab kev tswj hwm, thiab lwm yam. Nws daim ntawv thov tau nyiam kev mloog zoo los ntawm cov neeg teb xov tooj thoob ntiaj teb. XPON optical access technology yog qhov paub tab heev, EPON thiab GPON ob leeg yog tsim los ntawm chaw ua haujlwm hauv nruab nrab OLT, cov khoom siv ONU sab neeg siv thiab passive optical distribution network ODN. Ntawm lawv, ODN network thiab cov khoom siv yog ib feem tseem ceeb ntawm XPON integrated access, uas cuam tshuam txog kev tsim thiab kev siv ntawm lub network fiber ntau optical tshiab. Cov khoom siv ODN thiab cov nqi network cuam tshuam tau dhau los ua cov yam tseem ceeb uas txwv tsis pub siv XPON.
Lub Tswv Yim
Tam sim no, cov thev naus laus zis xPON feem ntau zoo siab suav nrog EPON thiab GPON.
GPON (Gigabit-CapablePON) thev naus laus zis yog tiam tshiab tshaj plaws ntawm broadband passive optical integrated access standard raws li ITU-TG.984.x tus qauv. Nws muaj ntau yam zoo xws li bandwidth siab, ua haujlwm tau zoo, npog loj, thiab cov neeg siv interfaces nplua nuj. Cov neeg teb xov tooj suav tias nws yog ib qho thev naus laus zis zoo tagnrho los ua kom tiav broadband thiab kev hloov pauv ntawm kev nkag mus rau cov kev pabcuam network. Qhov siab tshaj plaws ntawm GPON yog 2.5Gbps, kab upstream yog 1.25Gbps, thiab qhov siab tshaj plaws splitting ratio yog 1:64.
EPON yog ib hom thev naus laus zis nkag mus rau hauv broadband tshiab, uas ua tiav kev nkag mus rau cov ntaub ntawv, lub suab thiab video los ntawm ib qho kev nkag mus rau hauv fiber ntau optical, thiab muaj kev lag luam zoo. EPON yuav dhau los ua thev naus laus zis nkag mus rau hauv broadband. Vim yog cov yam ntxwv ntawm EPON network qauv, qhov zoo tshwj xeeb ntawm kev nkag mus rau hauv tsev broadband, thiab kev sib xyaw ua ke nrog cov khoos phis tawj network, cov kws tshaj lij thoob plaws ntiaj teb pom zoo tias passive optical networks yog kev ua tiav ntawm "peb lub network hauv ib qho" thiab kev daws teeb meem rau txoj kev loj. Qhov nruab nrab xa xov zoo tshaj plaws rau "mais kawg".
Lub tshuab PON network tiam tom ntej xPON:
Txawm hais tias EPON thiab GPON muaj lawv cov thev naus laus zis sib txawv, lawv muaj tib lub network topology thiab cov qauv tswj hwm network zoo sib xws. Lawv ob leeg tau tsom mus rau tib lub optical access network application thiab tsis yog non-convergence. Lub tshuab PON network tiam tom ntej xPON tuaj yeem txhawb nqa tib lub sijhawm. Ob lub qauv no, uas yog, xPON cov khoom siv tuaj yeem muab ntau hom kev nkag mus rau PON raws li cov kev xav tau sib txawv ntawm cov neeg siv, thiab daws qhov teeb meem ntawm kev tsis sib xws ntawm ob lub thev naus laus zis. Tib lub sijhawm, lub tshuab xPON muab lub platform tswj hwm network uas tuaj yeem tswj hwm ntau yam kev xav tau ua lag luam, paub txog kev pabcuam tag nrho (suav nrog ATM, Ethernet, TDM) kev txhawb nqa nrog kev lees paub QoS nruj, thiab txhawb nqa kev xa xov tooj cua cable TV los ntawm WDM; tib lub sijhawm, nws tuaj yeem txheeb xyuas EPON, GPON Access card ntxiv thiab rho tawm; nws yog qhov sib xws tiag tiag nrog EPON thiab GPON networks tib lub sijhawm. Rau cov thawj tswj hwm network, txhua qhov kev tswj hwm thiab kev teeb tsa yog rau kev lag luam, tsis hais txog qhov sib txawv ntawm EPON thiab GPON. Uas yog hais tias, kev siv EPON thiab GPON yog pob tshab rau kev tswj hwm network, thiab qhov sib txawv ntawm ob qho no yog tiv thaiv thiab muab rau cov txheej txheem sib koom ua ke sab saud. Lub platform tswj hwm network sib koom ua ke yog ib qho ntawm cov txiaj ntsig loj tshaj plaws ntawm lub kaw lus no, uas ua tiav qhov kev sib koom ua ke ntawm ob lub thev naus laus zis PON sib txawv ntawm qib kev tswj hwm network.
Cov yam ntxwv tseem ceeb thiab cov cim qhia kev ua haujlwm
Cov yam ntxwv tseem ceeb ntawm xPON network yog raws li nram no:
● Kev txhawb nqa ntau yam kev pabcuam: kom ua tiav kev pabcuam tag nrho (xws li ATM, Ethernet, TDM) kev txhawb nqa nrog kev lees paub QoS nruj, rau kev ua lag luam zoo, txhawb nqa downlink cable TV kis los ntawm WDM;
● Kev txheeb xyuas thiab kev tswj hwm ntawm EPON thiab GPON daim npav nkag mus;
●Kev txhawb nqa 1:32 ceg muaj peev xwm;
●Qhov kev sib kis tsis pub tshaj 20 kilometers;
●Tus nqi ntawm cov kab sib txuas ntawm sab saud thiab sab hauv qab yog 1.244Gbit/s. Txhawb nqa cov ntaub ntawv txog kev khiav tsheb ntawm qhov chaw nres nkoj;
●Txhawb nqa kev faib bandwidth dynamic thiab static.
● Txhawb nqa multicast thiab multicast functions
Cov ntsuas kev ua haujlwm tseem ceeb ntawm xPON network:
(1) Lub peev xwm ntawm lub kaw lus: Lub kaw lus muaj lub peev xwm loj IP switching core (30G) los muab 10G Ethernet network interface, thiab txhua OLT tuaj yeem txhawb nqa 36 PON networks.
(2) Kev sib txuas lus ntau yam: Txhawb nqa TDM, ATM, Ethernet, CATV, thiab muab kev lees paub QoS nruj, uas tuaj yeem suav nrog cov kev pabcuam uas twb muaj lawm. Nws yeej txhawb nqa kev txhim kho kev lag luam kom zoo.
(3) Qhov kev ntseeg siab thiab muaj peev xwm ntawm lub kaw lus: Lub kaw lus muab kev xaiv 1 + 1 kev tiv thaiv hloov pauv kom ua tau raws li qhov xav tau ntawm lub network kev sib txuas lus rau kev ntseeg siab ntawm lub network, thiab lub sijhawm hloov pauv tsawg dua 50ms.
(4) Network ntau yam: configurable 10,20Km network txoj kev, ua tau raws li qhov yuav tsum tau ua ntawm lub network nkag mus.
(5) Unified system management software platform: Rau ntau txoj kev nkag mus, muaj ib lub unified network management platform
Cov qauv
Lub kaw lus fiber ntau optical passive yog lub kaw lus xa xov fiber ntau broadband uas muaj cov chaw nres tsheb optical (OLT), lub network faib khoom optical (ODN), thiab lub chaw network optical (ONU), hu ua PON system. Tus qauv siv rau PON system tau qhia hauv Daim Duab 1.
Lub kaw lus PON siv cov qauv network point-to-multipoint, siv lub network faib khoom siv passive optical ua lub tshuab xa xov, siv hom tshaj tawm hauv qhov downlink, thiab hom ua haujlwm TDM hauv qhov uplink, uas ua tiav kev xa xov tooj cua ib leeg-fiber. Piv nrog rau lub network nkag mus ib txwm muaj, lub kaw lus PON tuaj yeem txo qhov kev siv nkag mus rau chav computer thiab nkag mus rau cov cables optical, nce qhov kev pabcuam network ntawm cov node nkag mus, nce tus nqi nkag mus, txo tus nqi tsis ua haujlwm ntawm cov kab thiab cov khoom siv sab nraud, thiab txhim kho kev ntseeg siab ntawm lub kaw lus. Tib lub sijhawm, nws kuj txuag cov nqi kho, yog li lub kaw lus PON yog cov thev naus laus zis siv tseem ceeb ntawm NGB ob txoj kev nkag mus rau network.
Raws li cov qauv sib txawv ntawm kev xa cov teeb liab ntawm lub kaw lus, nws tuaj yeem raug xa mus rau xPON, xws li APON, BPON, EPON, GPON thiab WDM-PON. GPON thiab EPON tau raug xa mus thoob plaws ntiaj teb, thiab kuj tseem muaj cov ntawv thov loj hauv kev hloov pauv ntawm xov tooj cua thiab TV ob txoj kev sib txuas. WDM-PON yog ib lub kaw lus uas siv cov channel wavelength ywj pheej ntawm OLT thiab ONU los tsim kev sib txuas taw tes. Piv nrog TDM- xws li EPON thiab GPON, PON thiab WDM-PON muaj qhov zoo ntawm bandwidth siab, kev pom tseeb ntawm cov txheej txheem, kev nyab xeeb thiab kev ntseeg siab, thiab kev nthuav dav muaj zog. Lawv yog cov kev taw qhia kev txhim kho yav tom ntej. Hauv lub sijhawm luv luv, vim yog cov ntsiab cai nyuaj ntawm WDM-PON, cov nqi khoom siv siab dua, thiab cov nqi system siab, nws tseem tsis tau muaj cov xwm txheej rau cov ntawv thov loj.
Cov ntsuas tseem ceeb ntawm xPON
① Lub peev xwm ntawm lub cev: Lub cev muaj lub peev xwm loj IP switching core (30G), muab 10G Ethernet network interface, thiab txhua OLT tuaj yeem txhawb nqa 36 PONs;
②Multi-service interface: txhawb TDM, ATM, Ethernet, CATV, thiab muab kev lav QoS nruj, tuaj yeem nqus tau tag nrho cov lag luam uas twb muaj lawm, thiab txhawb nqa kev txhim kho zoo ntawm kev lag luam;
③ Qhov system muaj kev ntseeg siab thiab muaj peev xwm ua tau: Lub system muab kev xaiv 1 + 1 tiv thaiv hloov mechanism kom ua tau raws li qhov yuav tsum tau ua ntawm lub network telecommunication rau kev ntseeg siab ntawm lub network, thiab lub sijhawm hloov pauv tsawg dua 50m;
④Network ntau yam: 10-20km network txoj kab uas hla tuaj yeem teeb tsa kom ua tau raws li qhov yuav tsum tau ua ntawm lub network nkag mus;
⑤Unified system management software platform: Rau ntau txoj kev nkag mus, nws muaj ib lub platform tswj hwm network sib koom ua ke.
HUANET tsim ntau yam qauv ntawm xPON ONU, xPON ONT, suav nrog 1GE xPON ONU, 1GE+1FE+CATV+WIFI xPON ONT, 1GE+1FE+CATV+POTS+WIFI xPON ONU, 1GE+3FE+POTS+WIFI xPON ONT. Peb kuj muab Huawei xPON ONT.
Lub sijhawm tshaj tawm: Lub Rau Hli-24-2021