FTTH Fiber Circuit Classification

Mutsara wekufambisa weFTTH wakakamurwa kuva mapoka matatu: Duplex (dual fiber bidirectional) loop, Simplex (single fiber bidirectional) loop uye Triplex (single fiber three-way) loop.Iviri-fiber loop inoshandisa maviri optical fibers pakati peOLTend uyeONUkuguma, imwe nzira iri zasi kwerwizi, uye chiratidzo chinobva kuOLTkuguma kweONUend; imwe nzira iri kumusoro, uye chiratidzo chinobva kuONUkuguma kweOLTend.Simplex single-fiber loop inonziwo Bidirectional, kana BIDI kwenguva pfupi. Iyi mhinduro inoshandisa imwe chete optical fiber kubatanidza iyoOLTend uyeONUkuguma, uye inoshandisa WDM kutumira zviratidzo kumusoro uye pasi nezviratidzo zvemaziso zvewavelengths yakasiyana-siyana.Kuenzaniswa neDuplex dual-fiber circuits, iyi single-fiber circuit inoshandisa WDM transmission inogona kuderedza huwandu hwefiber inoshandiswa nehafu uye kuderedza mari yeONUuser end. 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 neoptical fiber kuburikidza neoptical splitter kuendesa chiratidzo chemaziso kune yega yega optical network terminal (ONU/T), nokudaro zvichideredza zvakanyanya imba yemidziyo yetiweki Uye mutengo wekugadzirisa midziyo, kuchengetedza mari yakawanda yekuvaka senge optical cables, saka yave yazvino kupisa tekinoroji 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. Kuenzaniswa neEPON, ine hunhu hwekushandisa tekinoroji yakapusa, mutengo wakaderera uye nyore kuwana kune vashoma vashandisi.

Iyo P2P FTTH network inoendesa kumusoro uye yakadzika wavelengths pane imwe optical fiber pakati pehofisi yepakati.chinjauye midziyo yemushandisi 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.chinjamune yechinyakare Ethernet nzira yekuwana, uye inodzivirira Kuoma mukudyara kudzoreredza kunokonzerwa neakaderera kuvhura mwero, kuvhurika kunoshanduka uye kuchengetedzeka 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 paPON port yeOLTinosanganisa iyo 1550nm analog kana dijitari CATV optical siginecha kune optical fiber kuburikidza nemultiplexer, uye yozobatana kuneONUmushure mekupatsanurwa neiyo optical coupler. TheONUinoparadzanisa iyo 1550nm CATV siginecha uye inoishandura kuita redhiyo frequency sigiyo inogona kugamuchirwa neyakajairwa TV. TheONUzvakare inogadzirisa iyo data chiratidzo inotumirwa neOLTuye inoitumira kune mushandisi.Mushandisi wemushandisi anogona kupa FE neTDM nzvimbo dzekusangana kuti isangane nezvinodiwa zvebasa remushandisi kuti iwane Broadband, uye inopindirana nezviripo zvevashandi' TDM sevhisi zvinodiwa. EPON inoshandisa tekinoroji yeWDM kuona point-to-multipoint nzira mbiri dzekutaurirana pane imwechete optical fiber. Iyo ine maitiro eakajeka 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.