Kushandiswa kweEPON Technology muFTTx Access Network
Iyo EPON-yakavakirwa FTTx tekinoroji ine mabhenefiti epamusoro bandwidth, kuvimbika kwepamusoro, mutengo wakaderera wekugadzirisa, uye tekinoroji yakakura. Chechipiri, inosuma yakajairika application modhi yeEPON muFTTx, yobva yaongorora zvakakosha zveEPON tekinoroji mukushandisa uye inoongorora EPON. Zvakanakira zvinoongororwa. Zvinhu zvitatu zvakakosha zveOLTmidziyo network yekumisikidza, izwi sevhisi networking mode, uye yakasanganiswa network manejimendi ekuvaka muEPON-based FTTx yekuwana network inoongororwa.
1, EPON application mamiriro ekuongorora
EPON tekinoroji parizvino ndiyo huru yekuitwa kwebroadband Optical access uye FTTx. Tichifunga nezvehunhu hweEPON tekinoroji, kukura, mutengo wekudyara, zvinodiwa zvebhizinesi, makwikwi emusika uye zvimwe zvinhu, iwo makuru mashandisirwo eEPON tekinoroji anogona kukamurwa kuva anotevera marudzi:
FTTH (Fiber to the Home), FTTD (Fiber to the Desktop), FTTB (Fiber to the Building), FTTN/V, etc. Iwo mana modes anonyanya kuratidzwa mukusiyana kwechinzvimbo chekuguma kwetambo ye optical, kureba kwetambo yemhangura yekuwana, uye huwandu hwevashandisi hwakafukidzwa nenode imwe chete, Sarudza chinzvimbo chefiber yekuwana nzvimbo uyeONUmu X muFTTx. Kuburikidza nekutumirwa kweFTTx dzakasiyana-siyana kuti iwane optical fiber, chinangwa chekupedzisira cheFTTH chekusimudzira optical fiber kumba, FTTB/FTTN ndiyo inonyanya kushandiswa kwehupfumi padanho rino.
EPON inotora Ethernet semutakuri, inotora nzvimbo kune multipoint chimiro uye passive optical fiber transmission mode. The downlink rate inogona kusvika 10Gbit / s parizvino, uye iyo uplink inotumira data rwizi nenzira yekuputika Ethernet mapaketi. Parizvino, EPON Tekinoroji yakashandiswa zvakanyanya mumhando dzese dze "optical in copper out" yekuvaka maitiro evashandisi. Kubva pakuona kwenguva refu yeFTTx network evolution, kutaridzika kwe10G EPON Technology inopawo mhinduro iri nani yevashandi' FTTx network smooth upgrading.
FTTx inoshandisa optical fiber senzira yekutapurirana, ine zvakanakira hukuru hwekutapurirana, mhando yepamusoro, kuvimbika kwepamusoro, kureba kwekutapurirana chinhambwe, uye anti-electromagnetic kupindira. Ndiyo nzira yekusimudzira yekuwana Broadband.
(1) FTTH nzira
FTTH, kana kuti fiber-to-the-home method, inokodzera nzvimbo dzinogara vashandisi dzakapararira, dzakadai semavillas, uko vashandisi vane zvinodiwa zvepamusoro zvebhanwidth, uye vagadziri vanobatanidzwa mukuvaka network.FTTH inoziva " all optical access, hapana mhangura mukuita kwose”. Imwe node inoenderana nemushandisi mumwe. Mushandisi anowana iyo yakasimba bandwidth uye bhizinesi kugona, asi mutengo wekuvaka zvakare wakakwira.
(2) FTTD nzira
Iyo nzira yeFTTD inokodzera zviitiko apo zvivakwa zvepamusoro zvehofisi uye vamwe vashandisi zvakanyungudutswa uye zvinoda yakakwira bandwidth, uye inokodzerawo mamiriro epamusoro-bandwidth masevhisi akadai seIPTV anogadzirwa munzvimbo dzakaomarara dzekugara. Iyo general networking nzira ndeyekuburitsa iyo optical tambo kubva kuOLTpahofisi yepakati pechivako, isa optical splitter mukamuri yekugovera kana mukoridho wechivako, woibatanidza nedesktop yemushandisi kuburikidza netambo yekuona yechivako kana kudonhedza tambo. Muchiitiko ichi, zvakakosha kusarudza kana kuisa. iyo optical splitter mukoridho kana mukamuri yekugovera yechivako zvinoenderana nekusimba kwevashandisi. Panguva imwecheteyo, tichifunga nezvekureruka kwekuiswa, tekinoroji yekubatanidza inotonhora inofanira kushandiswa zvakanyanya sezvinobvira pakuisaONUkudivi remushandisi.
(3) FTTB nzira
Nzira yeFTTB inokodzera mamiriro ezvinhu apo nhamba yevashandisi mune imwe bhizinesi chivako iduku uye bandwidth inodiwa haisi yakakwirira. FTTB inoziva "fiber kuchivako, mhangura haibvi muchivako" Kuburikidza nenode iyi, zvinodiwa zvebhizinesi zvevashandisi vese muchivako zvakafukidzwa, uye mushandisi kuwana bandwidth uye kugona kwebhizinesi kunoramba kwakakwirira kwazvo, ndiyo mhinduro huru yenharaunda dzichangobva kuvakwa;
(4) FTTN/V nzira
FTTN/V ichokwadi "fiber kunharaunda (musha), mhangura haigone kusiya nharaunda (musha)", mushandisi anoisa tambo yefiber optic munharaunda (mumusha), uye anoisa nhamba diki kana kunyange mafundo chete munharaunda. komputa kamuri kana yekunze kabati yenharaunda (musha) ,Kuwana bhizinesi kufukidzwa kwevashandisi munharaunda yese (musha), uye yekuwana bandwidth uye kugona kwebhizinesi kushoma. Ndiyo mhinduro huru yekuvakwazve kwemadhorobha uye yekumaruwa "optical copper retreat".
Yakasiyana networking modes inokanganisa zvakananga kuvakwa kweODN uye marongero ePON system network zvinhu. Iyo yakakodzera networking mode inofanirwa kusarudzwa zvinoenderana nezvinodiwa chaizvo. Iyo FTTx network chikuva yakagovaniswa nevatengi vakasiyana uye akasiyana FTTx networking application modes inogona kumisikidzwa mumatunhu akasiyana.
2, Dambudziko rekuongorora EPON mukushandisa
2.1 Pfungwa huru dzeEPON mukuronga chirongwa
EPON inonyanya kutarisa zvinhu zvina mukuronga kweprojekiti: Optical cable network kuronga,OLTyekuisa nzvimbo, optical splitter yekuisa nzvimbo, uyeONUtype.
Kurongeka kwehurongwa hwetambo yemaziso, nzira yekupinda nayo mumba, uye kusarudzwa kwetambo yemagetsi/fiber ndizvo zvinonyanya kukosha muEPON networking process, iyo inozokanganisa mari yese yekudyara, kushandisa tambo dzemagetsi, kushandiswa kwemidziyo uye pombi. kushandiswa. Iko kushandiswa kwePON tekinoroji kunoisa zvakanyanya kudiwa kune yazvino mushandisi optical cable network networking mode, kunyanya mukurongeka kwemushandisi optical tambo mukati mesero. Kana tambo yefiber optic yakaiswa zvakasiyana kune mumwe nemumwe mushandisi, nhamba huru yefiber optic tambo dzinodiwa muchitokisi, izvo zvinopedza huwandu hukuru hwepombi zviwanikwa musero, zvichikonzera kuwedzera kwemutengo pamushandisi. Naizvozvo, zvinodikanwa kuita basa rakanaka mukuronga kwemushandisi optical cable network muchikamu chekutanga chekuvaka, kusanganisira iyo backbone optical cable routing, core number, nezvimwewo, kudzivirira kutambisa zviwanikwa zvakanyanya sezvinobvira.
Kuiswa kweOLTuye splitter ichakanganisa zvakanyanya marongero uye mutengo wekudyara weiyo optical cable network. Semuyenzaniso,OLTkuendeswa kuhofisi yepakati kunotora chikamu chebackbone optical cable, uye kutumirwa munharaunda kunorambidzwa nehofisi yekamuri zviwanikwa uye mari yekutsigira.Pakutanga kwekusimudzira, zvinokurudzirwa kuendesa iyoOLTpahofisi huru. Paunosarudza nzvimbo yemudziyo wega wega, kugoverwa kwevashandisi muchitokisi uye zvinodiwa zvebhanwidth zvevashandisi vakasiyana-siyana zvinofanirwa kutariswa panguva imwe chete, uye boka revashandisi rakanyanya uye boka revashandisi rakapararira rinofanira kurapwa zvakasiyana.
Mhando yeONUinofanira kusarudzwa pamwe chete netambo yetambo munzvimbo yekuwana.ONUskunyanya zvinosanganisira POS+DSL uye POS+LAN. Semuenzaniso, kana iyo yekuvakisa wiring munharaunda ine chete yakamonyoroka peya, iyoONUichashandisa POS + DSL, izwi Kupinda kuburikidza nesoftswitch, Broadband kuwana neADSL/VDSL; pakuvaka wiring munharaunda inotora Chikamu 5 wiring,ONUichashandisa POS + LAN midziyo, uye yezvivakwa zvehofisi, zvikamu, uye mapaki ane akasanganiswa wiring,ONUsichashandisa Equipment ine LAN interface.
Mukugadzirwa kweinjiniya, iyo yakanyanya kukoshesa kukosha muODN inofanirwa kudzorwa, uye inokurudzirwa kuidzora mukati me26dB.
2.2 Zvimiro zveEPON muFTTX networking
Kuenzaniswa nematekinoroji ekuwana echinyakare, tekinoroji inowedzera kukura yeFTTx yakavakirwa paEPON ine zvinotevera zvakanaka:
(1) Iyo tekinoroji iri nyore, mutengo wakaderera, uye masevhisi eIP anogona kufambiswa zvakanaka, izvo zvinogonesa kuchinjika uye nekukurumidza kutumira masevhisi. EPON iri nyore kugadzira. ODN inoiswa muchivako, uyeONUsanoiswa kudivi remushandisi kupa masevhisi akasiyana. Nguva yekuvaka ipfupi uye kutumirwa kwesevhisi kuri nyore uye kunochinjika.
(2) Muchirongwa, hapana chikonzero chekumisikidza midziyo yechinyakare inoshanda pakati pehofisi yepakati nenzvimbo yemushandisi, kuchengetedza kuvakwa kwekamuri yekombuta. ODN chigadziriso chinoshanda. Zviri nyore kuwana nzvimbo yekuvaka yeODN muchivako, iyo inoderedza mari yekuvaka, kubhadhara uye kugadzirisa kwekamuri yekombiyuta.
(3) Iyo network ine mari uye inochengetedza mari yekuvaka network. Iyo FTTx network inotora point-to-multipoint chimiro, iyo inochengetedza yakawanda yevashandisi backbone fiber zviwanikwa. Iyo yakakwirira-kumhanya fiber inogona kushandira vashandisi vakawanda panguva imwe chete, iyo inovandudza zvakanyanya kudzoka kwekudyara mukuvaka network.
(4) Zviri nyore kuchengetedza uye kubata. Kune EPON yakabatana network manejimendi pahofisi yepakati, iyo inokwanisa kubata mushandisi-diviONU, iri nyore kubata nekuchengetedza kupfuura HDSL modem kana optical modem.
3, Mhedziso
Muchidimbu, vashandi vari kutarisana nemhando dzakaoma dzemakwikwi. Mundima yekuwana network, chete kana vashandisi vakasarudza nzira yekuwana nayo vanogona kuvimbisa zvizere zvinofarirwa nevashandisi uye kusangana nezvinodiwa zvebhizinesi zvinogara zvichichinja.Iyo EPON system inyanzvi yekuwana tekinoroji yakatarisana neramangwana. Iyo EPON system ipuratifomu yemabasa akawanda uye isarudzo yakanaka yekushandura kune ese-IP network. EPON inogona kupa masevhisi ekumhanya-mhanya, akavimbika, akawanda-sevhisi uye anogoneka ekuwana masevhisi pamutengo wakaderera, unova kuratidzwa kuzere uye vimbiso yekukosha kwevashandisi nevashandisi.