FTTH Fiber Circuit Classification

Mutsara wekutumira weFTTH wakakamurwa kuva mapoka matatu: Duplex (dual fiber bidirectional) loop, Simplex (single fiber bidirectional) loop uye Triplex (single fiber three-way) loop.Iyo mbiri-fiber loop inoshandisa maviri optical fibers pakati pekupedzisira kweOLT. uyeONUkuguma, imwe nzira iri pasi, uye chiratidzo chinobva kumagumo eOLT kusvika kumagumo eONU;imwe nzira iri kumusoro, uye chiratidzo chinobva kumagumo eONU kusvika kumagumo eOLT.Simplex single-fiber loop inonziwo Bidirectional, kana BIDI kwenguva pfupi.Iyi sarudzo inoshandisa fiber imwe chete ye optical kuti ibatanidze OLT kuguma uye ONU kuguma, uye inoshandisa WDM kuendesa kumusoro uye kudzika zviratidzo nezviratidzo zve optical zvakasiyana-siyana zvewavelengths. kuderedza huwandu hwefiber inoshandiswa nehafu uye kuderedza mari yekuguma kwevashandi veONU.Zvisinei, kana iyo imwe-fiber nzira inoshandiswa, splitter uye musanganisi inofanira kuiswa mu optical transceiver module.Iyo inonyanya kuoma kupfuura optical transceiver module uchishandisa nzira mbiri yefiber.Iyo BIDI yekumusoro sigidhi inoshandisa iyo laser kutapurirana mu1260 kusvika 1360nm bhendi, uye yakadzika inoshandisa iyo 1480 kusvika 1580nm bhendi.Mune mbiri-fiber loop, ese ari kumusoro nekudzika anoshandisa 1310nm bhendi kufambisa masaini.

FTTH ine matekinoroji maviri: Media Converter (MC) uye Passive Optical Network (PON).MC inonyanya kushandiswa kutsiva waya dzemhangura dzinoshandiswa mutsika dzeEthernet network, uye inotora point-to-point (P2P) network topology kuendesa 100Mbps masevhisi kudzimba dzevashandisi kuburikidza neoptical fibers.Kuvakwa kwePON kunonyanya kupatsanura maziso. chiratidzo kubva kune optical line terminal (OLT) yakadzika kuburikidza ne-optical fiber kuburikidza ne-optical splitter kuendesa chiratidzo chemaziso kune imwe neimwe optical network terminal (ONU / T), nokudaro kuderedza zvikuru network yemidziyo yekamuri Uye mutengo wekugadzirisa midziyo, kuchengetedza mari yakawanda yekuvaka yakadai semagetsi emagetsi. ,saka yave tekinoroji yazvino inopisa yeFTTH.FTTH parizvino ine mhinduro nhatu: point-to-point FTTH mhinduro, EPON FTTH mhinduro uye GPON FTTH mhinduro.

P2P-yakavakirwa FTTH Solution

P2P inzvimbo-kune-point optical fiber yekubatanidza Ethernet yekufambisa tekinoroji.Iyo zvakare inoshandisa tekinoroji yeWDM kuwana nzira mbiri dzekutaurirana.Kana ichienzaniswa neEPON, ine hunhu hwekushandisa tekinoroji yakapusa, mutengo wakaderera uye kuwana nyore kwenhamba shoma yevashandisi.

Iyo P2P FTTH network inoendesa kumusoro uye yakadzika wavelengths pane imwe optical fiber pakati pepakati hofisi switch uye mushandisi zvishandiso kuburikidza neWDM, uye mushandisi wega wega anongoda imwe optical fiber.Iyo yakakwira yavelength ndeye 1310nm, uye yakadzika yavelength ndeye 1550nm.Kuburikidza nekushandiswa kweiyo optical fiber transmission, iyo Ethernet inotambanudzwa zvakananga kubva kuhofisi yepakati kuenda kune desktop yemushandisi.Nepo ichipa yakakwira-bandwidth uye yehupfumi nzira yekuwana, inobvisa kuoma kwesimba rekupa uye kugadzirisa kwekoridho switch mune yechinyakare Ethernet nzira yekuwana, uye inodzivirira Kuomerwa mukudzoreredza kwekudyara kunokonzerwa nekuderera kwekuvhura mwero, kuvhurika kuchinjika uye kuchengetedzwa kwakanyanya.Mumhinduro yeP2P, vashandisi vanogona kunakidzwa chaizvo ne100M bandwidth chete, uye nyore kutsigira yakakwirira-bandwidth masevhisi akadai sevhidhiyophone, vhidhiyo painodiwa, telemedicine, uye kureba dzidzo.Ichiri kutsigira yakakwirira-kumhanya data application, inogona kupa E1 interface uye POTS interface, kuitira kuti akasiyana masevhisi aingoda yakazvimirira wiring anogona kugadziriswa kuburikidza nefiber imwe chete.

EPON-yakavakirwa FTTH Solution

EPON inotora nzvimbo-kune-multipoint chimiro uye passive optical fiber transmission nzira.Chiyero chepasi chinogona kusvika ku10Gb / s, uye kumusoro kunotumira hova dze data mukuputika kweEthernet mapaketi.Pamusoro pezvo, EPON inopawo mamwe mashandiro, kugadzirisa uye manejimendi (OAM) mabasa.EPONtekinoroji ine kuenderana kwakanaka nemidziyo iripo.Iyo ichangoburwa Hunhu hweSevhisi (QoS) tekinoroji inoita kuti Ethernet ikwanise kutsigira izwi, data uye mifananidzo masevhisi.Aya matekinoroji anosanganisira yakazara-duplex rutsigiro, pamberi uye chaiyo yenzvimbo yenzvimbo network (VLAN).

EPON inoshandisa optical fiber kubatanidza pakati pepakati hofisi midziyo uye ODN optical coupler.Mushure mekupatsanurwa kuburikidza neiyo optical coupler, vanosvika makumi matatu nevaviri vashandisi vanogona kubatana.Iyo yavelength yekumusoro i1310nm, uye yakadzika wavelength i1490nm.Iyo optical fiber kubva kuPON port yeOLT inosanganisa iyo 1550nm analog kana dijitari CATV optical chiratidzo kune optical fiber kuburikidza nemultiplexer, uye yozobatana kuneONUmushure mekupatsanurwa neiyo optical coupler.Iyo ONU inopatsanura iyo 1550nm CATV siginecha uye inoishandura kuita redhiyo frequency chiratidzo chinogona kutambirwa neTV yakajairika.Iyo ONU inobatawo chiratidzo che data chinotumirwa neOLT uye inotumira kune mushandisi interface.Mushandisi wemushandisi anogona kupa FE uye TDM interfaces kuti isangane nemushandisi sevhisi yevashandisi yebroadband kuwana, uye inopindirana neiyo iripo 'TDM sevhisi zvinodiwa nevashandisi.EPON inoshandisa tekinoroji yeWDM kuona point-to-multipoint nzira mbiri dzekutaurirana pane imwechete optical fiber.Iyo ine hunhu hweakajeka fomati uye yakaderera mutengo, uye inoenderana nekusimudzira maitiro eIP-inotevera-chizvarwa network.Tichifunga kuti ramangwana "mambure matatu mune imwe" achashandisa IP seyakanyanya protocol, nyanzvi zhinji dzinotenda kuti EPON ndiyo mhinduro yakanakisa yekuziva FTTH mune ramangwana.

GPON-yakavakirwa FTTH Solution

GPONndiyo yazvino tekinoroji yekuwana tekinoroji yakatangwa neITU-T mushure meA/BPON.Muna 2001, FSAN yakatanga rimwe basa rakajairwa rakanangana nekumisa maPON network (GPON) ine kumhanya kwekushanda kwakakwira kupfuura 1Gb/s.Pamusoro pekutsigira kumhanya kwepamusoro, GPON inotsigirawo akawanda masevhisi ane hunyanzvi hwepamusoro, achipa akawanda OAM&P mabasa uye scalability yakanaka.Iwo makuru maficha eGPON ndeaya:

1) Tsigira ese masevhisi.

2) Iyo yekuvhara kureba ingangoita 20km.

3) Tsigira akawanda mareti pasi peiyo protocol.

4) Ipa OAM & P basa.

5) Zvinoenderana neiyo nhepfenyuro hunhu hwePON yakadzika traffic, nzira yekudzivirira yekuchengetedza pane protocol layer inopihwa.

Iyo GPON chiyero inopa yakanyanya kushanda mwero wekutapurirana kune akasiyana masevhisi, uchifunga nezve OAM&P mabasa nekusimudzira kugona.GPON haisi kungopa hupamhi hwepamusoro, asiwo inotsigira mabasa akasiyana-siyana ekuwana, kunyanya mu data uye TDM kutumira, kutsigira maitiro ekutanga pasina kutendeuka.GPON inotora iyo itsva transmission convergence layer protocol "General Framing Protocol (GFP)" kuti ione kuvharidzirwa kwezvizhinji. nzizi dzebasa;panguva iyi, inochengetedza mabasa akawanda muG.983 asina hukama zvakananga nePON protocol, yakadai seOAM neDBA.