Fiber to the Home (FTTH) yatanga kutorwa zvakanyanya nemakambani ekutaurirana
Pasi rose, zvichiita kuti matekinoroji akure nekukurumidza. Active optical networks (AON) uye passive optical networks (PON) ndiwo masisitimu maviri makuru anoita kuti FTTH broadband connections ikwanise. PON inogona kupa mhinduro dzinodhura zvakanyanya inowanikwa munzvimbo zhinji dzeFTTH deployments. ABC yePON ichaunzwa munyaya ino, iyo inonyanya kusanganisira zvikamu zvekutanga uye tekinoroji ine chekuita nayo inosanganisira OLT, ONT, ONU, uye ODN.
Tsananguro yePON: Tsananguro, Maitiro uye Zvakanakira
Network ye "passive optical network" inoreva network ye "fiber-optic" inoshandisa "point-to-multipoint topology" uye "optical splitters" kuendesa data kubva panzvimbo imwe chete yekutumira kuenda kune akawanda user endpoints. Kusiyana neAON, vatengi vakawanda vanobatanidzwa kune transceiver imwe chete kuburikidza ne "branching tree" ye "fibers" uye "passive splitter/combiner units", inoshanda zvachose munzvimbo ye "optical" uye isina simba muPON architecture. Kune zviyero zviviri zvikuru zvePON: Gigabit Passive Optical Network (GPON) uye Ethernet Passive Optical Network (EPON). Maumbirwo avo e "topology" akafanana. Sesarudzo yekutanga mune akawanda FTTH deployments scenarios, mhinduro yePON ine mabhenefiti akati wandei akakosha:
Kushandiswa Kwesimba Rakaderera
Nzvimbo Inodiwa Zvishoma
Bandwidth Yakakwirira
Kuchengetedzwa Kwepamusoro-soro
Zviri nyore kuisa uye kuwedzera
Mari Yekushanda Nekutarisira Yakaderedzwa
Maumbirwo ePON neZvikamu
Muhurongwa hweGigabit Ethernet Passive Optical Network (GEPON), kune optical line terminal (OLT) pahofisi yepakati yemupi webasa uye ma optical network units (ONUs) kana optical network terminals (ONTs) ari pedyo nevashandisi, pamwe ne optical splitter (SPL). Pamusoro pezvo, optical distribution network (ODN) inoshandiswawo panguva yekutumira pakati peOLT neONU/ONT.
Chiteshi cheOptical Line (OLT)
OLT ndiyo nzvimbo yekutanga ye network ye optical passive, iyo yakabatana ne core switch kuburikidza ne Ethernet cables. Basa guru reOLT nderekushandura, kuronga, uye kutumira masaini e network yePON uye kuronga ma optical network terminals multiplexing ye transmission yakagovaniswa kumusoro. Kazhinji, michina yeOLT ine rack, CSM (Control and Switch Module), ELM (EPON Link Module, PON card), redundancy protection -48V DC power supply modules, kana imwe 110/220V AC power supply module, uye mafeni. Muzvikamu izvi, kadhi rePON ne power supply zvinotsigira hot-swap nepo imwe module yakavakwa mukati. OLT ine nzira mbiri dzekuyangarara: kumusoro (kuwana kuparadzira mhando dzakasiyana dzedata uye voice traffic kubva kune vashandisi) uye pasi (kuwana data, voice, uye video traffic kubva kune metro network kana kubva kune long-haul network uye kuitumira kune ese ONT modules paODN.) Daro guru rinotsigirwa pakutumira kuburikidza neODN i20 km.
Chiteshi cheOptical Network (ONU) / Chiteshi cheOptical Network (ONT)
ONU inoshandura masaini ekuona anotumirwa kuburikidza nemafibers kuenda kumasaini emagetsi. Masaini aya emagetsi anozotumirwa kune vanhu vakanyoresa. Kazhinji, pane daro kana imwe network yekupinda pakati peONU nenzvimbo yemushandisi wekupedzisira. Uyezve, ONU inogona kutumira, kuunganidza, uye kugadzirisa mhando dzakasiyana dzedata rinobva kumutengi uye kuritumira kumusoro kuOLT. Kugadzirisa inzira inogadzirisa uye kurongazve ruzivo rwedata kuitira kuti riendeswe zviri nani. OLT inotsigira kugoverwa kwebandwidth kunoita kuti data riendeswe zvakanaka kuOLT, iyo inowanzo svika nekukurumidza kubva kumutengi. ONU inogona kubatanidzwa nenzira dzakasiyana-siyana uye mhando dzetambo, senge waya yemhangura yakasonwa, waya yecoaxial, fiber yemaziso, kana kuburikidza neWi-Fi.
Midziyo yekushandisa inogonawo kunzi optical network terminal (ONT). Kutaura zvazviri, ONT yakafanana neONU. ONT izwi reITU-T, nepo ONU izwi reIEEE. Zviri muzvikamu zvakasiyana, zvese zvinoreva michina yemushandisi muGEPON system. Asi mukuita, pane musiyano mudiki pakati peONT neONU zvichienderana nenzvimbo yazvo.
Network yekugovera yeOptical (ODN)
ODN, chikamu chakakosha chePON system, inopa nzira yekutumira optical yekubatanidza maONU neOLTs iri kure nemakiromita makumi maviri kana kupfuura. Mukati meODN, tambo dzefiber optic, fiber optic connectors, passive optical splitters, uye assistant components zvinoshanda pamwe chete. ODN ine zvikamu zvishanu zvinoti feeder fiber, optical distribution point, distribution fiber, optical access point, uye drop fiber. feeder fiber inotanga kubva pa optical distribution frame (ODF) iri mu central office telecommunication room uye inoguma panzvimbo ye optical distribution yekuvhara kure. Distribution fiber kubva panzvimbo ye optical distribution kusvika panzvimbo ye optical access point inogovera optical fibers kunzvimbo dziri pedyo nayo. Drop fiber inobatanidza optical access point kuma terminals (ONTs), zvichiita kuti optical fiber idonhe mudzimba dzevashandisi. Pamusoro pezvo, ODN ndiyo nzira yakakosha yekutumira data rePON uye hunhu hwayo hunokanganisa zvakananga mashandiro, kuvimbika, uye scalability yePON system.
Mhedziso
OLT, ONU kana ONT, uye ODN ndizvo zvinhu zvikuru muGEPON system, izvo zvave zvichishandiswa zvakanyanya muFTTH applications kusvika pari zvino. Kuderera kwemidziyo yekubatanidza mawaya (pasina zvinhu zvinoshanda) uye flexible media transmission zvinoita kuti passive optical networks ive yakanakira maapplication epamba eInternet, izwi, uye mavhidhiyo. Pamusoro pezvo, passive optical networks dzinogonawo kushandiswa mumakoriji nemabhizinesi, zvichipa mhinduro dzinodhura. Sezvo tekinoroji yePON yakaramba ichivandudzika, maapplication anogona kuwedzerwawo.
Nguva yekutumira: Chikumi-14-2022