Taw qhia rau EPON thiab 10G-EPON
Piv nrog GPON network thiab 10G-GPON, nws zoo li tias EPON thiab 10G-EPON tsis tshua paub, tsab xov xwm no feem ntau yuav qhia EPON & 10G-EPON, thiab qhov sib txawv ntawm GPON thiab EPON.
EPON yog dab tsi?
EPON (Ethernet Passive Optical Network), yog PON thev naus laus zis raws li Ethernet. Nws txais cov qauv point-to-multi-point, passive optical fiber kis tau tus mob, thiab muab ntau yam kev pab cuam ntawm Ethernet.
Ib qho kev kho qhov muag fiber ntau nrog ob lub wavelengths yog siv hauv EPON network los xa cov teeb liab bidirectional1.25Gbit / s. 1310nm ntawm kev taw qhia nce toj, qis qis 1490nm. EPON network yog tsim los ntawm OLT (Optical Line Terminal), ONU (Optical Network Unit) thiab ODN (Optical DistributionNetwork). Lub cev topology yog point-to-multipoint tree network, thiab cov logical topology yog ntau qhov taw tes-to-point txuas los ntawm OLT rau txhua ONU. Ntawm lawv, ODN ua lub luag haujlwm ntawm kev sib txuas OLT thiab ONU.
Raws li ib qho ntawm PON thev naus laus zis, EPON muaj cov yam ntxwv zoo xws li cov bandwidth siab, kev pab cuam ntev, kev sib txuas yooj yim, thiab cov kab nruab nrab nruab nrab. Ua ntawv thov rau broadband accessnetworks, nws tuaj yeem txhim kho lub network bandwidth thiab kev ua haujlwm thiab txo cov nqi tu. Nws yog anoptical access technology nyiam los ntawm mainstream tswv. EPON tuaj yeem siv rau hauv FTTH, FTTB, FTTO thiab FTTM ib puag ncig los muab lub suab, cov ntaub ntawv thiab kev pabcuam video.
PON txoj cai ua haujlwm
EPON downstream kev sib txuas lus txoj cai
EPON txais yuav hom kev tshaj tawm hauv cov kev taw qhia qis. Txhua ONUs tuaj yeem tau txais cov ntaub ntawv tib yam.Different ONU cov ntaub ntawv yog qhov txawv ntawm LLID (Logical Link Identifier), thiab ONUs lim tshaj tawm xov xwm kom tau txais lawv cov ntaub ntawv.
EPON kev sib txuas lus sab sauv txoj cai
Hauv kev taw qhia txog dej ntws los ntawm ONU rau OLT, lub sijhawm faib ntau yam cuab yeej siv tshuab (TDMA) tau siv los xa cov tsheb thauj mus los hauv lub sijhawm.
10G-EPON yog dab tsi?
10G-EPON yog ib qho kev txhim kho EPON tiam tom ntej technology raws li EPON technicalstandards uas twb muaj lawm. Nws tsuas yog daws cov teeb meem hauv qab no ntawm EPON tes hauj lwm:
Kev txhim kho txuas ntxiv ntawm cov lag luam siab-bandwidth muaj ntau dua qhov yuav tsum tau ua rau bandwidth, thiab EPON thev naus laus zis tsis tuaj yeem muab bandwidth txaus kom tau raws li qhov xav tau.
Cov neeg siv-sab nkag siv thev naus laus zis txuas ntxiv tsim kho tshiab, thiab cov neeg siv nkag mus siv bandwidth tseem nce ntxiv. EPON thev naus laus zis yuav dhau los ua ib qho bandwidth bottleneck.
Spliting ratio thiab kis nrug ncaj qha cuam tshuam rau kev tsim kev lag luam network.
Symmetrical 10G-EPON
Symmetric-rate 10G-EPON txhawb nqa ob qho tib si xa tawm thiab tau txais cov ntaub ntawv txoj kev ua haujlwm ntawm 10 Gbit / s.
Asymmetric 10-EPON
Asymmetric upstream kis tau tus mob yog 1G-EPON, downstream kis ntawm 10 Gbit / s.
10G-EPON downstream kev sib txuas lus txoj cai
Hauv kev taw qhia qis qis, OLT xa cov ntaub ntawv mus rau ONU ntawm kev tshaj tawm, txhua ONU tuaj yeem tau txais cov ntaub ntawv tib yam, thiab ONU yuav txiav txim seb puas yuav tau txais cov ntaub ntawv raws li LLID cov ntaub ntawv.
10G-EPON kev sib txuas lus sab sauv txoj cai
Nyob rau hauv qhov kev taw qhia saum toj kawg nkaus, lub sij hawm faib ntau yam kev siv tshuab (TDMA) yog siv los xa cov tsheb thauj mus los hauv lub sijhawm, thiab ONU ua cov ntaub ntawv xa mus rau hauv av raws li lub sijhawm teem los ntawm OLT.
EPON rau 10G EPON evolution
Nrog rau kev txhim kho thiab nrov ntawm cov kev pabcuam siab ceev ceev xws li cov xov tooj cua siab, kev sib txuas lus video, kev soj ntsuam video, kev ua si hauv online, kev siv Internet, thiab VoIP, kev siv bandwidth tau ntsib cov teeb meem loj. EPON network tsuas yog muab 1.25G tus nqi, uas tsis tuaj yeem ua tau raws li cov neeg xav tau ntawm bandwidth, 10G-EPON los ua. 10G EPON yog sib xws nrog 1G EPON. 10G EPON thiab 1G EPON tuaj yeem ua ke los ntawm kev sib koom tib yam ODN, OLT thiab PON chaw nres nkoj.
Saum toj no tsuas yog cov lus piav qhia yooj yim thiab luv luv txog EPON thiab 10G-EPON, qee qhov EPON tseem ceeb Technology zoo li DBA FEC thiab EPON Standards & raws tu qauv tsis tau hais hauv tsab xov xwm no, yog tias koj xav paub ntxiv, koj tuaj yeem tiv taujwww.htfwdm.compab txhawb nqa.
