AON yog dab tsi?
AON yog lub network ua haujlwm kho qhov muag, feem ntau yog siv qhov taw tes-rau-point (PTP) network architecture, thiab txhua tus neeg siv tuaj yeem muaj cov kab hluav taws xob kho qhov muag tshwj xeeb. Active optical network hais txog kev xa tawm ntawmrouters, switching aggregators, active optical equipment and other switching equipment between central office equipment and user distribution units during the signal transmission. Cov switchgears no tau tsav los ntawm hluav taws xob los tswj cov teeb liab kev faib tawm thiab kev taw qhia cov cim rau cov neeg siv khoom tshwj xeeb. Cov khoom siv kho qhov muag muaj xws li lub teeb ci (laser), optical receiver, optical transceiver module, optical amplifier (fiber amplifier thiab semiconductor optical amplifier).
PON yog dab tsi?
PON yog Passive Optical Network, taw tes-rau-multipoint network qauv, thiab yog lub ntsiab thev naus laus zis rau FTTB / FTTH. Passive optical network hais txog ODN (optical distribution network) tsuas yog siv cov fibers optical thiab passive Cheebtsam, thiab tsuas yog yuav tsum siv cov cuab yeej nyob ntawm qhov chaw teeb liab thiab cov teeb liab tau txais qhov kawg. Nyob rau hauv ib tug raug PON system, lub optical splitter yog lub hauv paus, thiab lub optical splitter yog siv los cais thiab sau cov optical signals kis los ntawm lub network. Cov splitters rau PON yog bidirectional. Nyob rau hauv qhov kev taw qhia downstream, ntau yam kev pab cuam xws li IP cov ntaub ntawv, lub suab, thiab yees duab raug faib los ntawm covOLTnyob rau hauv lub hauv paus chaw ua hauj lwm nyob rau hauv lub tshaj tawm hauv xov los ntawm lub 1: N passive optical splitter nyob rau hauv lub ODN Rau tag nrho covONUunits ntawm PON; nyob rau hauv cov kev taw qhia upstream, ntau cov ntaub ntawv kev pabcuam los ntawm txhua tusONUyog txuas mus rau tib lub fiber ntau optical los ntawm 1: N passive optical combiner hauv ODN yam tsis muaj kev cuam tshuam rau ib leeg, thiab thaum kawg xa mus rauOLTntawm qhov chaw ua haujlwm hauv nruab nrab rau kev txais tos kawg.
Passive optical network muaj xws li cov kab hluav taws xob kho qhov muag (OLT) ntsia ntawm qhov chaw nres tsheb hauv nruab nrab, thiab ib pab pawg sib koom ua ke ntawm cov khoom siv kho qhov muag (ONUs) ntsia ntawm tus neeg siv qhov chaw. Optical distribution network (ODN) nruab nrab ntawm covOLTthiab covONUmuaj cov fibers optical thiab passive splitters lossis couplers. PON tau muab faib ua peb tus qauv: ATM-based APON (ATM PON), Ethernet-based EPON (Ethernet PON), thiab GPON (Gigabit PON) raws li General Frame Protocol.
Nyob rau hauv lub AON network, tus neeg siv muaj ib tug tshwj xeeb kho qhov muag fiber kab, uas yog ib qho yooj yim rau tom qab kev kho mob network, muaj peev xwm nthuav dav, kev hloov kho network, thiab lwm yam. Tsis tas li ntawd, AON network npog ntau yam ntawm kwv yees li 100 kilometers; PON network feem ntau txwv rau fiber ntau optic cables mus txog 20 kilometers. AON feem ntau coj cov teeb liab kho qhov muag los ntawm cov khoom siv nquag, thiab PON siv cov khoom siv tsis muaj zog, uas ua rau cov nqi siab dua rau AON kev xa tawm network dua li PON.