Nrog rau kev nce ntxiv ntawm cov kev pabcuam uas Passive Optical Networks (PON) nqa, nws tau dhau los ua qhov tseem ceeb kom rov qab tau cov kev pabcuam sai sai tom qab cov kab tsis ua haujlwm. PON tiv thaiv kev hloov pauv thev naus laus zis, ua ib qho kev daws teeb meem tseem ceeb los xyuas kom meej tias kev lag luam txuas ntxiv mus, txhim kho kev ntseeg siab ntawm lub network los ntawm kev txo lub sijhawm cuam tshuam network kom tsawg dua 50ms los ntawm cov txheej txheem ntse redundancy.
Lub ntsiab lus ntawmPONkev hloov pauv kev tiv thaiv yog kom ntseeg tau tias kev lag luam txuas ntxiv mus los ntawm kev tsim qauv ob txoj kev ntawm "thawj + thaub qab".
Nws cov txheej txheem ua haujlwm tau muab faib ua peb theem: thawj zaug, nyob rau theem nrhiav pom, lub kaw lus tuaj yeem txheeb xyuas qhov tawg ntawm cov fiber lossis cov khoom siv tsis ua haujlwm hauv 5ms los ntawm kev sib xyaw ua ke ntawm kev saib xyuas lub zog kho qhov muag, kev ntsuas qhov yuam kev, thiab cov lus qhia ntawm lub plawv dhia; Thaum lub sijhawm hloov pauv, qhov kev nqis tes ua hloov pauv tau pib ua haujlwm raws li lub tswv yim teeb tsa ua ntej, nrog rau kev ncua sijhawm hloov pauv ib txwm tswj tau hauv 30ms; Thaum kawg, nyob rau theem rov qab, kev tsiv teb tsaws chaw ntawm 218 cov kev lag luam xws li VLAN chaw thiab kev faib bandwidth tau ua tiav los ntawm lub cav sib dhos teeb tsa, kom ntseeg tau tias cov neeg siv kawg tsis paub txog.
Cov ntaub ntawv xa tawm tiag tiag qhia tau tias tom qab siv cov thev naus laus zis no, lub sijhawm cuam tshuam txhua xyoo ntawm PON tes hauj lwm tuaj yeem txo qis los ntawm 8.76 teev mus rau 26 vib nas this, thiab kev ntseeg tau tuaj yeem txhim kho los ntawm 1200 zaug. Cov txheej txheem tiv thaiv PON tam sim no suav nrog plaub hom, Hom A rau Hom D, tsim kom muaj cov txheej txheem kev ua tiav los ntawm qhov yooj yim mus rau qib siab.
Hom A (Trunk Fiber Redundancy) txais yuav kev tsim ntawm ob lub qhov rooj PON ntawm OLT sab sib koom MAC chips. Nws tsim kom muaj qhov txuas fiber optic thawj thiab thaub qab los ntawm 2: N splitter thiab switches hauv 40ms. Nws cov nqi hloov kho vajtse tsuas yog nce 20% ntawm cov peev txheej fiber, ua rau nws tsim nyog rau cov xwm txheej xa mus luv luv xws li cov tes hauj lwm hauv tsev kawm ntawv. Txawm li cas los xij, nws yuav tsum tau sau tseg tias cov phiaj xwm no muaj kev txwv ntawm tib lub rooj tsavxwm, thiab ib qho tsis ua haujlwm ntawm lub splitter yuav ua rau muaj kev cuam tshuam ob qhov txuas.
Hom B siab dua (OLT chaw nres nkoj redundancy) xa ob lub chaw nres nkoj ntawm cov chips MAC ywj pheej ntawm sab OLT, txhawb hom thaub qab txias / sov, thiab tuaj yeem txuas ntxiv mus rau ob lub tsev tswj hwm OLTs. HauvFTTHkev sim xwm txheej, qhov kev daws teeb meem no tau ua tiav kev tsiv teb tsaws chaw ntawm 128 ONUs hauv 50ms, nrog rau qhov poob pob ntawm 0. Nws tau ua tiav siv rau lub kaw lus xa video 4K hauv lub network tshaj tawm hauv xeev thiab TV.
Hom C (kev tiv thaiv fiber tag nrho) yog xa mus los ntawm kev xa mus rau backbone/distributed fiber dual path, ua ke nrog ONU dual optical module tsim, los muab kev tiv thaiv kawg-rau-kawg rau cov txheej txheem kev lag luam nyiaj txiag. Nws tau ua tiav 300ms qhov yuam kev rov qab los hauv kev sim kev ntxhov siab ntawm kev lag luam hauv khw, ua tau raws li tus qauv kev cuam tshuam sub-second ntawm cov txheej txheem kev lag luam.
Qib siab tshaj plaws Hom D (tag nrho lub kaw lus kub thaub qab) siv cov qauv tub rog qib, nrog kev tswj hwm ob qho tib si thiab ob lub dav hlau architecture rau ob qho tib si OLT thiab ONU, txhawb nqa peb txheej redundancy ntawm fiber / chaw nres nkoj / fais fab mov. Ib qho kev xa tawm ntawm 5G chaw nres tsheb hauv paus backhaul network qhia tau hais tias qhov kev daws teeb meem tseem tuaj yeem tswj tau 10ms qib hloov pauv kev ua tau zoo hauv qhov chaw ib puag ncig hnyav ntawm -40 ℃, nrog rau lub sijhawm cuam tshuam txhua xyoo tswj tau hauv 32 vib nas this, thiab tau dhau MIL-STD-810G tub rog tus qauv ntawv pov thawj.
Yuav kom ua tiav kev hloov pauv tsis muaj teeb meem, yuav tsum kov yeej ob qho teeb meem tseem ceeb:
Hais txog kev teeb tsa synchronization, lub kaw lus siv cov thev naus laus zis sib txawv incremental synchronization los xyuas kom meej tias 218 qhov tsis zoo li qub xws li VLAN thiab QoS cov cai yog sib xws. Tib lub sijhawm, nws synchronizes dynamic data xws li MAC address table thiab DHCP lease los ntawm lub tshuab replay ceev, thiab seamlessly inherit security keys raws li AES-256 encryption channel;
Nyob rau theem rov qab tau kev pabcuam, lub tshuab lav peb zaug tau tsim - siv cov txheej txheem tshawb pom sai sai los nias lub sijhawm sau npe ONU rov qab mus rau hauv 3 vib nas this, ib qho algorithm ntws dej ntse raws li SDN kom ua tiav kev teem sijhawm tsheb khiav, thiab kev kho qhov tsis siv neeg ntawm ntau yam kev ntsuas xws li lub zog kho qhov muag / qeeb.
Lub sijhawm tshaj tawm: Lub Rau Hli-19-2025