Kodi mawonekedwe a netiweki a Optical Access Network (OAN) ndi chiyani?
Optical access network (OAN) imatanthawuza kugwiritsidwa ntchito kwa fiber optical ngati njira yayikulu yotumizira kuzindikira ntchito yotumizira uthenga pa netiweki yofikira.Imalumikizidwa ku node yautumiki kudzera pa optical line terminal (OLT), ndikulumikizidwa kwa wogwiritsa ntchito kudzera pa optical network unit (ONU).Optical fiber access network imaphatikizapo zida zakutali-optical network unit ndi central office equipment-optical line terminal, zomwe zimagwirizanitsidwa ndi zipangizo zotumizira.Zigawo zazikulu za dongosololi ndi OLT ndi kutaliONU.Amamaliza kutembenuka kwa ma protocol a signing from the service node interface (SNI) to user network interface (UNI) mu network yonse yofikira.Chipangizo chofikira pachokha chimakhalanso ndi maukonde ndipo chimatha kupanga mitundu yosiyanasiyana ya netiweki topology.Pa nthawi yomweyo, zipangizo mwayi alinso ndi ntchito za yokonza m'deralo ndi kutali centralized kuyan'anila, kupanga yokonza kasamalidwe maukonde kudzera transparent kuwala kufala, ndi kubweretsa izo mu malo maukonde kasamalidwe kasamalidwe ogwirizana kudzera lolingana maukonde kasamalidwe protocol.
Udindo wa OLT ndikupereka mawonekedwe pakati pa netiweki yolumikizira ndi masinthidwe am'deralo, ndikulankhulana ndi gawo la optical network pagawo la ogwiritsa ntchito kudzera pakutumiza kwa kuwala.Imalekanitsa kotheratu ntchito yosinthira kusintha kwa ogwiritsa ntchito.The optical line terminal imapereka chisamaliro ndi kuyang'anira yokha komanso kutha kwa wogwiritsa ntchito.Ikhoza kuikidwa mwachindunji kumapeto kwa ofesi yosinthanitsa pamodzi ndi kusinthanitsa kwapafupi, kapena ikhoza kukhazikitsidwa kumapeto kwakutali.
Ntchito ya ONU ndikupereka mawonekedwe ogwiritsira ntchito pa intaneti.Ikhoza kugwirizanitsidwa ndi ma terminals osiyanasiyana ogwiritsira ntchito, ndipo panthawi imodzimodziyo imakhala ndi ntchito yotembenuza photoelectric ndi ntchito yofanana yokonza ndi kuyang'anira.Ntchito yaikulu ya ONU ndiyo kuthetsa chingwe cha kuwala kuchokera ku OLT, kukonza chizindikiro cha kuwala ndikupereka mawonekedwe a ntchito kwa mabizinesi ang'onoang'ono angapo, ogwiritsa ntchito malonda ndi ogwiritsa ntchito okhalamo.Mapeto a intaneti a ONU ndi mawonekedwe owoneka bwino, ndipo mapeto ake ogwiritsira ntchito ndi magetsi.Choncho, ONU ili ndi optical / magetsi ndi magetsi / kuwala kutembenuza ntchito.Ilinso ndi ntchito za digito / analogi ndi analogi / digito kutembenuka kwa zokambirana.ONU nthawi zambiri imayikidwa pafupi ndi wogwiritsa ntchito, ndipo malo ake amakhala ndi kusinthasintha kwakukulu.
Optical Access Network (OAN) imagawidwa kukhala Active Optical Network (AON, Active Optical Network) ndi Passive Optical Network (PON, Passive Optica Optical Network) potengera kugawa kwadongosolo.
Maonekedwe a topological of network optical fiber access network amatanthauza makonzedwe a geometric a mizere yopatsira ndi mfundo.Imawonetsa malo ogwirizana komanso mawonekedwe olumikizana a node iliyonse pamaneti.Mapangidwe a topological of network ali ndi chikoka chofunikira pamaneti ntchito, mtengo ndi kudalirika.Mapangidwe atatu ofunikira a topological ndi: mawonekedwe a basi, owoneka ngati mphete komanso ngati nyenyezi.Kuchokera pa izi, mabasi-nyenyezi, nyenyezi ziwiri, mphete ziwiri, mabasi-basi ndi mafomu ena ophatikizana ophatikizika angatengedwe.Iliyonse ili ndi mawonekedwe ake komanso chowonjezera chogwirizana.