Kugwiritsa ntchito EPON Technology mu FTTx Access Network

Tekinoloje ya EPON yochokera ku FTTx ili ndi maubwino a bandwidth apamwamba, kudalirika kwakukulu, mtengo wotsika wokonza, komanso ukadaulo wokhwima. Kachiwiri, imayambitsa njira yogwiritsiridwa ntchito ya EPON mu FTTx, kenako ndikusanthula mbali zazikulu zaukadaulo wa EPON mukugwiritsa ntchito ndikusanthula EPON. Ubwino wake ukuunika. Nkhani zitatu zazikulu zaOLTKuyika kwa netiweki kwa zida, njira yolumikizira mautumiki amawu, komanso kasamalidwe kamanetidwe kaphatikizidwe mu EPON-based FTTx network access network akuwunikidwa.

1, EPON kusanthula zochitika

Tekinoloje ya EPON pakadali pano ndiyo kukhazikitsa kwakukulu kwa Broadband Optical access ndi FTTx. Poganizira za ukadaulo wa EPON, kukhwima, mtengo wandalama, zofunikira zamabizinesi, mpikisano wamsika ndi zinthu zina, ntchito zazikulu zaukadaulo wa EPON zitha kugawidwa m'mitundu iyi:

FTTH (Fiber to the Home), FTTD (Fiber to the Desktop), FTTB (Fiber to Building), FTTN/V, etc. Mitundu inayi imawonetseredwa makamaka kusiyana kwa malo a mapeto a chingwe cha kuwala, kutalika kwa chingwe chamkuwa chofikira, komanso kuchuluka kwa ogwiritsa ntchito omwe amaphimbidwa ndi node imodzi, Dziwani malo a malo ofikira ulusi ndiONUmu X mu FTTx. Kupyolera mu kutumizidwa kwa FTTx zosiyanasiyana kuti akwaniritse kuwala kwa kuwala, cholinga chachikulu cha FTTH kulimbikitsa kuwala kwa fiber kunyumba, FTTB/FTTN ndiyo njira yoyendetsera ndalama zambiri panthawiyi.

EPON imatenga Efaneti ngati chonyamulira, itengera malo opangira ma multipoint komanso ma passive optical fiber transmission mode. Kutsika kwapang'onopang'ono kumatha kufika 10Gbit / s pakadali pano, ndipo uplink imatumiza mtsinje wa data ngati mapaketi a Ethernet ophulika. Pakalipano, EPON Technology yakhala ikugwiritsidwa ntchito kwambiri mumitundu yonse ya "optical in copper out" yomanga makina opangira ntchito. Kuchokera pakuwona kwa nthawi yayitali ya FTTx kusinthika kwa maukonde, maonekedwe a 10G EPON Technology amaperekanso njira yabwino yothetsera operekera FTTx network kukweza bwino.

FTTx imagwiritsa ntchito fiber optical monga njira yotumizira, yomwe ili ndi ubwino wa mphamvu zazikulu zotumizira, khalidwe lapamwamba, kudalirika kwakukulu, mtunda wautali wotumizira, ndi kusokoneza kwa anti-electromagnetic. Ndi njira yachitukuko yofikira ku Broadband.

(1) FTTH njira

FTTH, kapena njira ya fiber-to-home, ndiyoyenera kumadera omwe ogwiritsa ntchito amakhala obalalika, monga nyumba zosungiramo nyumba, kumene ogwiritsira ntchito ali ndi zofunikira zapamwamba za bandwidth, ndipo otukula akugwira nawo ntchito yomanga maukonde.FTTH amazindikira kuti "mawonekedwe onse a kuwala, palibe mkuwa panthawi yonseyi". Node imodzi imafanana ndi wogwiritsa ntchito m'modzi. Wogwiritsa ntchito amapeza mphamvu zamphamvu kwambiri za bandwidth ndi bizinesi, koma mtengo womanga umakhalanso wokwera.

(2) FTTD njira

Njira ya FTTD ndi yoyenera pazochitika zomwe nyumba zamaofesi apamwamba ndi ogwiritsa ntchito ena zimakhazikika ndipo zimafuna bandwidth yapamwamba, komanso ndizoyeneranso zochitika zomwe mautumiki apamwamba a bandwidth monga IPTV amapangidwira m'madera okhalamo. Njira yayikulu yolumikizira intaneti ndikutulutsa chingwe cha kuwala kuchokera kuOLTku ofesi yapakati kupita ku nyumbayi, ikani chophatikizira chamagetsi m'chipinda choperekerako kapena khola la nyumbayo, ndikuchilumikiza pakompyuta ya wogwiritsa ntchito kudzera pa chingwe chamagetsi chanyumbayo kapena chingwe chotsitsa. chogawanitsa kuwala mukhonde kapena m'chipinda choperekera nyumbayo molingana ndi mphamvu ya ogwiritsa ntchito. Pa nthawi yomweyi, poganizira za kuphweka kwa kukhazikitsa, teknoloji yolumikizira ozizira iyenera kugwiritsidwa ntchito momwe mungathere pakuyikaONUkumbali ya ogwiritsa ntchito.

(3) FTTB njira

Njira ya FTTB ndi yoyenera pazochitika zomwe chiwerengero cha ogwiritsa ntchito mu nyumba imodzi yamalonda ndi yaying'ono ndipo zofunikira za bandwidth sizokwera. FTTB imazindikira kuti "fiber ku nyumbayi, mkuwa suchoka m'nyumba" .Chingwe chowunikira cha woyendetsa chimafikira ku nyumbayo, ndipo node yolowera imayikidwa mu khola. Kupyolera mu node iyi, zosowa za bizinesi za onse ogwiritsa ntchito m'nyumbayi zimaphimbidwa, ndipo mwayi wogwiritsa ntchito bandwidth ndi mphamvu zamalonda zimakhalabe zapamwamba kwambiri, ndiyo njira yothetsera midzi yomwe yangomangidwa kumene;

(4) FTTN/V njira

FTTN/V kwenikweni ndi "fiber kwa anthu ammudzi (mudzi), mkuwa sungathe kuchoka kumudzi (mudzi)", wogwira ntchitoyo amatumiza chingwe cha fiber optic m'mudzi (mudzi), ndikuyika nambala yochepa kapena ma node okha Chipinda cha makompyuta kapena nduna zakunja za anthu ammudzi (mudzi) ,Kukwaniritsa kufalikira kwa bizinesi kwa ogwiritsa ntchito m'dera lonselo (mudzi), ndipo kuthekera kwake kwa bandwidth ndi bizinesi ndizofooka. Ndilo yankho lalikulu pakumanganso mizinda komanso kumidzi "optical copper retreat".

Mitundu yosiyanasiyana ya maukonde imakhudza mwachindunji kumangidwa kwa ODN ndi makonzedwe a PON system network element. Njira yoyenera yolumikizira intaneti iyenera kusankhidwa malinga ndi zosowa zenizeni. Malo ochezera a FTTx omwe amagawidwa ndi makasitomala osiyanasiyana komanso mitundu yosiyanasiyana ya maukonde a FTTx akhoza kukhazikitsidwa m'magawo osiyanasiyana.

2, Kusanthula kwavuto kwa EPON mukugwiritsa ntchito

2.1 Mfundo zazikuluzikulu za EPON pokonzekera ntchito

EPON imayang'ana kwambiri zinthu 4 pokonzekera projekiti: kukonza ma cable network,OLTmalo oyika, malo opangira optical splitter, ndiONUmtundu.

Mapulani a dongosolo la chingwe cha kuwala, njira yolowera m'nyumba, ndi kusankha kwa chingwe cha kuwala / CHIKWANGWANI ndizovuta kwambiri pa intaneti ya EPON, zomwe zidzakhudze ndalama zonse, kugwiritsa ntchito chingwe, kugwiritsa ntchito zipangizo ndi mapaipi. kugwiritsa ntchito. Kugwiritsa ntchito ukadaulo wa PON kumapangitsa kuti pakhale zofunidwa kwambiri pamachitidwe ochezera amakono a optical cable network, makamaka pakuyika kwa zingwe zowonera mkati mwa cell. Ngati chingwe cha fiber optic chimayikidwa padera kwa wogwiritsa ntchito aliyense, zingwe zambiri za fiber optic zimafunika mu selo, zomwe zidzawononge ndalama zambiri zamapaipi mu selo, zomwe zimapangitsa kuti mtengo uwonjezeke kwa wogwiritsa ntchito. Choncho, m'pofunika kuchita ntchito yabwino pokonzekera wosuta kuwala chingwe maukonde kumayambiriro siteji yomanga, kuphatikizapo msana kuwala chingwe routing, pachimake nambala, etc., kupewa kuwononga chuma mmene ndingathere.

Kuyika kwaOLTndi splitter zidzakhudza kwambiri masanjidwe ndi mtengo wandalama wa netiweki ya chingwe cha Optical. Mwachitsanzo,OLTKutumizidwa ku ofesi yapakati kudzakhala mbali ya chingwe cha backbone Optical, ndipo kutumizidwa kwa anthu ammudzi kumaletsedwa ndi zipangizo zaofesi komanso ndalama zothandizira.OLTku ofesi yapakati. Posankha malo a chipangizo chilichonse, kugawa kwa ogwiritsa ntchito mu selo ndi zofunikira za bandwidth za ogwiritsa ntchito osiyanasiyana ziyenera kuganiziridwa panthawi imodzimodzi, ndipo gulu la ogwiritsira ntchito wandiweyani ndi gulu la ogwiritsira ntchito obalalika liyenera kuchitidwa mosiyana.

Mtundu waONUziyenera kusankhidwa pamodzi ndi kamangidwe ka chingwe m'dera lofikira.ONUmakamaka POS+DSL ndi POS+LAN. Mwachitsanzo, pamene mawaya omanga m'deralo ali ndi mawaya opotoka okha, aONUadzagwiritsa ntchito POS + DSL, Voice Access kudzera pa softswitch, burodibandi kupeza ADSL/VDSL; pomanga mawaya m'deralo amatenga ma waya a Gawo 5,ONUadzagwiritsa ntchito zida za POS + LAN, komanso nyumba zamaofesi, mayunitsi, ndi mapaki okhala ndi mawaya ophatikizika,ONUidzagwiritsa ntchito Zida zokhala ndi mawonekedwe a LAN.

Mu kapangidwe ka uinjiniya, kuchuluka kocheperako mu ODN kuyenera kuwongoleredwa, ndipo tikulimbikitsidwa kuti tiziwongolera mkati mwa 26dB.

2.2 Mawonekedwe a EPON mumanetiweki a FTTX

Poyerekeza ndi umisiri wanthawi zonse, ukadaulo wa FTTx womwe ukukulirakulira wotengera EPON uli ndi izi:

(1) Ukadaulowu ndi wosavuta, mtengo wake ndi wotsika, ndipo mautumiki a IP amatha kupatsirana bwino, zomwe zimathandizira kusinthasintha komanso kutumizira mwachangu kwa mautumiki. EPON ndi yosavuta kupanga. ODN imayikidwa mu nyumbayi, ndiONUamayikidwa kumbali ya ogwiritsa ntchito kuti apereke ntchito zosiyanasiyana. Nthawi yomangayi ndi yaifupi ndipo kutumiza ntchito ndikosavuta komanso kosavuta.

(2) Mu dongosolo, palibe chifukwa chokhazikitsa zida zogwirira ntchito zachikhalidwe pakati pa ofesi yapakati ndi malo ogwiritsira ntchito, kupulumutsa kumanga chipinda cha makompyuta. ODN ndi chipangizo chongokhala. Ndikosavuta kupeza malo omanga a ODN mnyumbamo, zomwe zimachepetsa mtengo womanga, kubwereketsa ndi kukonza chipinda cha makompyuta.

(3) Ma network ndi azachuma ndipo amapulumutsa ndalama zomangira maukonde. Maukonde a FTTx amatengera kapangidwe ka point-to-multipoint, komwe kumapulumutsa zida zambiri za fiber backbone. Fiber yothamanga kwambiri imatha kuthandiza ogwiritsa ntchito angapo nthawi imodzi, zomwe zimathandizira kwambiri kubweza ndalama pakumanga maukonde.

(4) Yosavuta kusamalira ndi kusamalira. Pali EPON united network management ku ofesi yapakati, yomwe imatha kuyang'anira mbali ya ogwiritsa ntchitoONU, yomwe ndi yosavuta kuwongolera ndi kukonza kuposa modemu ya HDSL kapena modemu ya kuwala.

3, Mapeto

Mwachidule, ogwira ntchito akukumana ndi mitundu yambiri ya mpikisano. M'munda wa maukonde ofikira, pokhapokha ogwiritsira ntchito asankha njira yoyenera yofikira angathe kutsimikizira mokwanira zofuna za ogwira ntchito ndi kukwaniritsa zosowa zamalonda zomwe zimasintha nthawi zonse.Njira ya EPON ndi teknoloji yatsopano yofikira yomwe ikuyang'anizana ndi tsogolo. Dongosolo la EPON ndi nsanja yantchito zambiri ndipo ndi chisankho chabwino pakusintha kupita ku netiweki ya IP yonse. EPON ikhoza kupereka ntchito zothamanga kwambiri, zodalirika, zogwiritsa ntchito zambiri komanso zokhoza kuyendetsedwa pamtengo wotsika kwambiri, womwe ndi chiwonetsero chathunthu ndi chitsimikizo cha mtengo kwa ogwiritsa ntchito ndi ogwiritsa ntchito.