Centralized Spliting yog dab tsi?
Lub centralized splitting network yog ib tug nyob rau hauv uas lub optical splitters ntawm lub optical kab davhlau ya nyob twg (OLT) thiab lub kho qhov muag network unit (ONU) nyob rau hauv parallel, yeej nyob rau hauv daim ntawv ntawm "OLT → optical splitter → ONU", qhov twg cov splitting ratio ntawm cov optical splitters siv feem ntau yog 1:64. Hauv daim ntawv thov kev sib faib hauv nruab nrab, lub optical splitter tuaj yeem ntsia tau rau hauv nruab nrab ntawm qhov chaw ua haujlwm hauv nruab nrab, tab sis txhawm rau txuag ntawm cov nqi fiber ntau, cov optical splitter feem ntau yog nruab nrab ntawm OLT thiab ONU hauv kev xyaum.
Lub OLT (Optical Line Terminal) qhov chaw nres nkoj nyob rau hauv lub hauv paus chaw ua hauj lwm (CO) yuav txuas / spliced mus rau ib tug fiber ntau tawm hauv CO. Cov fiber ntau no kis tau los ntawm kev sib txawv kaw kom ncav cuag qhov chaw nres nkoj ntawm fiber ntau splitter, feem ntau muab tso rau hauv ib lub txee. Ib qho fiber ntau tawm ntawm qhov chaw ua haujlwm hauv nruab nrab (CO) yuav koom nrog lossis txuas mus rau OLT (Optical Line Terminal) chaw nres nkoj. Yuav kom tau txais mus rau qhov chaw nres nkoj ntawm fiber ntau splitter, uas feem ntau nyob hauv lub txee, cov fiber ntau no yuav tsum dhau los ntawm ntau qhov kev kaw. Qhov fiber ntau splitter qhov chaw tso zis txuas mus rau FTTH faib network, uas txuas rau cov neeg siv khoom muaj peev xwm lub tsev ntawm ntau qhov chaw kaw thiab sab hauv tsev / sab nraum zoov lub thawv, lossis ONTs (Optical Network Terminal). Nrog rau qhov centralized splitting architecture, PON yog li txuas ib qho chaw nres nkoj OLT rau 32 ONTs.
Distributed Spliting yog dab tsi?
Nyob rau hauv sib piv rau centralized splitting architecture, ib tug faib splitting tswv yim tsis siv fiber splitters nyob rau hauv lub hauv paus chaw ua hauj lwm. Ib qho kev cog ntoo sab nraud yog txuas ncaj qha rau lossis txuas mus rau OLT chaw nres nkoj. Nyob ze ntawm lub chaw ua haujlwm tseem ceeb, thawj theem ntawm kev sib cais (1: 4 lossis 1: 8) yog tsim nyob rau hauv ib qho kev kaw. Lub OLT fiber ntau tuaj txog ntawm lub chaw ua haujlwm hauv nruab nrab yog txuas nrog cov tswv yim ntawm thawj qib fiber ntau splitter. Txhua qhov sib cais ntawm qib thib ob ntawm fiber ntau splitters (1: 16 lossis 1: 8), uas nyob hauv cov thawv davhlau ya nyob twg ze ze rau cov neeg siv khoom, tuaj yeem npog 8 txog 16 qhov chaw nyob. Cov fibers los ntawm cov zis ntawm thawj theem splitters hais los saum no yog cov inputs ntawm cov PON splitters.
Yuav Ua Li Cas Xaiv Ntawm Centralized Splitting vs Distributed Spliting?
Qhov zoo thiab qhov tsis zoo ntawm centralized splitting thiab faib splitting tes hauj lwm yog sau los ntawm cov lus hauv qab no:
FTTH network architecture yuav txiav txim siab los ntawm ntau qhov sib txawv, suav nrog koj qhov xwm txheej nyiaj txiag thiab kev cia siab rau yav tom ntej. Qhov ntsuas ntawm koj cov neeg siv khoom hauv paus yog lwm qhov kev txiav txim siab tseem ceeb. Kev faib tawm yuav yog qhov zoo tshaj plaws rau kev sib txuas ntau cov neeg siv khoom sai hauv nroog. Txawm li cas los xij, kev faib nruab nrab hauv nruab nrab yog qhov zoo dua vim nws muaj kev hloov pauv ntau dua rau cov chaw nyob deb lossis tsis tshua muaj neeg nyob.
Xaus
Thov nco ntsoov coj mus rau hauv tus account txhua qhov tshwj xeeb ntawm koj lub network scenario ua ntej xaiv cov txheej txheem kev sib cais los siv hauv PON-based FTTH network. Muab hais tias ob qho tib si centralized thiab faib splitting tes hauj lwm muaj qhov zoo thiabqhov tsis zoo, qhov zoo tshaj plaws architecture yog ib qho uas txaus siab rau cov neeg muab kev pab xav tau thiab kev cia siab thaum txo cov nqi peev, ua kom cov nuj nqis ua haujlwm ntev, thiab tsim kom muaj lub network uas muaj pov thawj yav tom ntej thiab tuaj yeem hloov mus rau cov thev naus laus zis tshiab yam tsis muaj kev hloov pauv loj.