Yintoni i-xPON

Njengesizukulwana esitsha setekhnoloji yokufikelela kwifayibha ye-optical, i-XPON ineengenelo ezinkulu ekuchaseni ukuphazamiseka, iimpawu ze-bandwidth, umgama wokufikelela, ukugcinwa kunye nolawulo, njl. Ukusetyenziswa kwayo kutsale ingqalelo enkulu kubaqhubi behlabathi. Itekhnoloji yokufikelela kwi-optical ye-XPON ivuthiwe ngokwe-EPON kwaye zombini i-GPON yenziwe yi-central office OLT, izixhobo ze-ONU ezikwicala lomsebenzisi kunye nenethiwekhi yokusasazwa kwe-optical engasebenziyo ye-ODN. Phakathi kwazo, inethiwekhi kunye nezixhobo ze-ODN ziyinxalenye ebalulekileyo yokufikelela okudibeneyo kwe-XPON, okubandakanya ukwenziwa kunye nokusetyenziswa kwenethiwekhi entsha yefayibha ye-optical. Izixhobo ze-ODN ezinxulumene noko kunye neendleko zokunxibelelana ziye zaba zizinto ezibalulekileyo ezithintela usetyenziso lwe-XPON.

Ingcamango

Okwangoku, ubuchwepheshe be-xPON obuthembisayo ngokubanzi buquka i-EPON kunye ne-GPON.

Itekhnoloji ye-GPON (Gigabit-CapablePON) sisizukulwana samva nje somgangatho wokufikelela odibeneyo we-broadband passive optical osekelwe kumgangatho we-ITU-TG.984.x. Inezibonelelo ezininzi ezifana ne-bandwidth ephezulu, ukusebenza kakuhle, ukugubungela okukhulu, kunye neendawo ezixineneyo zomsebenzisi. Abaqhubi bayijonga njengetekhnoloji efanelekileyo yokufezekisa i-broadband kunye notshintsho olupheleleyo lweenkonzo zenethiwekhi yokufikelela. Izinga eliphezulu le-GPON elisezantsi yi-2.5Gbps, umgca ongaphezulu yi-1.25Gbps, kwaye umlinganiselo wokwahlukana okuphezulu yi-1:64.

I-EPON luhlobo lobuchwepheshe obutsha bokufikelela kwi-broadband, obufezekisa ukufikelela kwedatha, ilizwi kunye nevidiyo ngenkqubo yokufikelela kwi-fiber enye ye-optical, kwaye busebenza kakuhle kwezoqoqosho. I-EPON iya kuba yiteknoloji yokufikelela kwi-broadband eqhelekileyo. Ngenxa yeempawu zesakhiwo senethiwekhi ye-EPON, iingenelo ezikhethekileyo zokufikelela kwi-broadband ekhaya, kunye nokudibana kwendalo kunye neenethiwekhi zekhompyutha, iingcali kwihlabathi liphela ziyavumelana ukuba iinethiwekhi ze-optical ezingasebenziyo kukufezekiswa "kweenethiwekhi ezintathu kwelinye" kunye nesisombululo kwindlela yolwazi. Eyona ndlela ilungileyo yokudlulisela idatha "kwimayile yokugqibela".

Inkqubo yenethiwekhi ye-PON yesizukulwana esilandelayo xPON:

Nangona i-EPON kunye ne-GPON zinetekhnoloji zazo ezahlukeneyo, zine-topology yenethiwekhi efanayo kunye nesakhiwo esifanayo solawulo lwenethiwekhi. Zombini zijolise kwisicelo senethiwekhi yokufikelela kwi-optical kwaye azihambelani. Inkqubo yenethiwekhi ye-PON yesizukulwana esilandelayo i-xPON inokuxhasa ngaxeshanye. Le migangatho mibini, oko kukuthi, izixhobo ze-xPON zinokubonelela ngeendlela ezahlukeneyo zokufikelela kwi-PON ngokweemfuno ezahlukeneyo zabasebenzisi, kwaye zisombulule ingxaki yokungahambelani kwetekhnoloji ezimbini. Kwangaxeshanye, inkqubo ye-xPON ibonelela ngeqonga lolawulo lwenethiwekhi elidibeneyo elinokulawula iimfuno ezahlukeneyo zeshishini, lifezekise amandla okuxhasa apheleleyo (kubandakanya i-ATM, i-Ethernet, i-TDM) ngesiqinisekiso esiqinileyo se-QoS, kwaye lixhase ukuhanjiswa kweTV yekhebula nge-WDM; kwangaxeshanye, inokuchonga ngokuzenzekelayo i-EPON, ikhadi le-GPON Access longezwa kwaye lirhoxiswe; lihambelana ngokwenene neenethiwekhi ze-EPON kunye ne-GPON ngaxeshanye. Kubaphathi benethiwekhi, lonke ulawulo kunye noqwalaselo lolweshishini, nokuba umahluko wobuchwephesha phakathi kwe-EPON kunye ne-GPON ungakanani. Oko kukuthi, ukusetyenziswa kobuchwephesha kwe-EPON kunye ne-GPON kuyabonakala kulawulo lwenethiwekhi, kwaye umahluko phakathi kwezi zimbini ukhuselekile kwaye unikezelwa kwi-interface edibeneyo yomaleko ophezulu. Iqonga lolawulo lwenethiwekhi edibeneyo yenye yezona nzuzo zinkulu zale nkqubo, eqinisekisa ngokwenene ukuhlanganiswa kweetekhnoloji ezimbini ezahlukeneyo ze-PON kwinqanaba lolawulo lwenethiwekhi.

Iiparameters eziphambili kunye nezibonakaliso zobugcisa

Iiparameter eziphambili zenethiwekhi ye-xPON zezi zilandelayo:

●Iinkonzo ezininzi zokuxhasa: ukufezekisa iinkonzo ezipheleleyo (kuquka i-ATM, i-Ethernet, i-TDM) ngesiqinisekiso esingqongqo seQoS, sokwenza ngcono ishishini, ukuxhasa ukuhanjiswa kweTV ngentambo ye-downlink nge-WDM;

●Ukuchongwa ngokuzenzekelayo kunye nokulawulwa kwamakhadi okufikelela e-EPON kunye ne-GPON;

●Xhasa amandla esebe le-1:32;

●Umgama wokudluliselwa awudluli kwiikhilomitha ezingama-20;

●Isantya somgca ohambelanayo onyukayo nophantsi yi-1.244Gbit/s. Inkxaso yomsebenzi wezibalo zethrafikhi yezibuko;

●Xhasa umsebenzi wokwabiwa kwe-bandwidth enamandla kunye ne-static.

●Xhasa imisebenzi yokusasaza okuninzi kunye nemisebenzi yokusasaza okuninzi

Izalathisi eziphambili zobugcisa zenethiwekhi ye-xPON:

(1) Umthamo wenkqubo: Le nkqubo inesiseko sokutshintsha i-IP esinamandla amakhulu (30G) ukubonelela nge-interface yenethiwekhi ye-10G Ethernet, kwaye i-OLT nganye inokuxhasa iinethiwekhi ze-PON ezingama-36.

(2) Ujongano lweenkonzo ezininzi: Ixhasa i-TDM, i-ATM, i-Ethernet, i-CATV, kwaye ibonelela ngesiqinisekiso esiqinileyo se-QoS, esinokubandakanya ngokupheleleyo iinkonzo ezikhoyo. Ixhasa ngokwenene ukuphuculwa okubushelelezi kweshishini.

(3) Iimfuno zokuthembeka okuphezulu kwenkqubo kunye nokufumaneka kwayo: Inkqubo ibonelela ngendlela yokutshintsha ukhuseleko lwe-1+1 ukuze ihlangabezane ngokupheleleyo neemfuno zenethiwekhi yonxibelelwano ukuze inethiwekhi ithembeke, kwaye ixesha lokutshintsha lingaphantsi kwe-50ms.

(4) Uluhlu lwenethiwekhi: indlela yenethiwekhi ye-10,20Km enokulungiselelwa, ihlangabezana ngokupheleleyo neemfuno zenethiwekhi yokufikelela.

(5) Iqonga lesoftware yolawulo lwenkqubo edibeneyo: Kwiindlela ezahlukeneyo zokufikelela, yiba neqonga lolawulo lwenethiwekhi edibeneyo

Ulwakhiwo

Inkqubo yenethiwekhi yefayibha ye-optical engasebenziyo yinkqubo yokudlulisa i-broadband yefayibha ye-optical eyenziwe yi-optical line terminal (OLT), inethiwekhi yokusasazwa kwe-optical (ODN), kunye neyunithi yenethiwekhi ye-optical (ONU), ebizwa ngokuba yinkqubo ye-PON. Imodeli yesalathiso senkqubo ye-PON iboniswe kuMfanekiso 1.

Inkqubo ye-PON isebenzisa isakhiwo senethiwekhi ye-point-to-multipoint, isebenzisa inethiwekhi yokusasazwa kwe-optical engasebenziyo njengendlela yokudlulisa umbane, isebenzisa imo yokusasaza kwi-downlink, kunye nemo yokusebenza ye-TDM kwi-uplink, efezekisa ukuhanjiswa kwesignali ye-single-fiber bidirectional. Xa kuthelekiswa nenethiwekhi yokufikelela yendabuko, inkqubo ye-PON inokunciphisa ukusetyenziswa kokufikelela kwigumbi lekhompyutha kunye nokufikelela kwiintambo ze-optical, yonyuse ukugubungela kwenethiwekhi ye-access node, yonyuse izinga lokufikelela, yonciphise izinga lokusilela kwemigca kunye nezixhobo zangaphandle, kwaye iphucule ukuthembeka kwenkqubo. Kwangaxeshanye, ikwagcina iindleko zokulungisa, ngoko ke inkqubo ye-PON yeyona teknoloji iphambili yesicelo senethiwekhi yokufikelela ngeendlela ezimbini ye-NGB.

Ngokweendlela ezahlukeneyo zokusasaza isignali zenkqubo, inokubizwa ngokuba yi-xPON, njenge-APON, i-BPON, i-EPON, i-GPON kunye ne-WDM-PON. I-GPON kunye ne-EPON zisasazwe kakhulu kwihlabathi liphela, kwaye kukwakho nezicelo ezinkulu ekuguqulweni kwenethiwekhi yerediyo kunye nethelevishini eneendlela ezimbini. I-WDM-PON yinkqubo esebenzisa iziteshi ezizimeleyo zamaza phakathi kwe-OLT kunye ne-ONU ukwenza uqhagamshelo oluvela kwindawo ukuya kwindawo. Xa kuthelekiswa ne-TDM- ezifana ne-EPON kunye ne-GPON, i-PON kunye ne-WDM-PON zinezibonelelo ze-bandwidth ephezulu, ukucaca kweprotocol, ukhuseleko kunye nokuthembeka, kunye nokukhula okunamandla. Ziyindlela yophuhliso lwexesha elizayo. Kwixesha elifutshane, ngenxa yemigaqo enzima ye-WDM-PON, amaxabiso aphezulu esixhobo, kunye neendleko eziphezulu zenkqubo, ayinazo iimeko zezicelo ezinkulu.

Izalathisi zobugcisa eziphambili ze-xPON

①Umthamo wenkqubo: Le nkqubo inesiseko sokutshintsha i-IP esinamandla amakhulu (30G), ibonelela nge-interface yenethiwekhi ye-10G Ethernet, kwaye i-OLT nganye inokuxhasa ii-PON ezingama-36;

②Ujongano lweenkonzo ezininzi: inkxaso ye-TDM, i-ATM, i-Ethernet, i-CATV, kwaye inika isiqinisekiso esiqinileyo se-QoS, inokuyifunxa ngokupheleleyo ishishini elikhoyo, kwaye ixhase ngokwenene ukuphuculwa okugudileyo kweshishini;

③ Iimfuneko zokuthembeka okuphezulu kunye nokufumaneka kwenkqubo: Inkqubo ibonelela ngendlela yokutshintsha ukhuseleko lwe-1+1 ukuze ihlangabezane ngokupheleleyo neemfuno zenethiwekhi yonxibelelwano ukuze inethiwekhi ithembeke, kwaye ixesha lokutshintsha lingaphantsi kwe-50m;

④Uluhlu lwenethiwekhi: Ububanzi benethiwekhi obuyi-10-20km bunokulungiswa ukuze buhlangabezane ngokupheleleyo neemfuno zenethiwekhi yokufikelela;

⑤Iqonga lesoftware yolawulo lwenkqubo edibeneyo: Kwiindlela ezahlukeneyo zokufikelela, ineqonga lolawulo lwenethiwekhi edibeneyo.

I-HUANET ivelisa iimodeli ezininzi ze-xPON ONU, xPON ONT, kuquka i-1GE xPON ONU, 1GE+1FE+CATV+WIFI xPON ONT, 1GE+1FE+CATV+POTS+WIFI xPON ONU, 1GE+3FE+POTS+WIFI xPON ONT. Sikwabonelela ngeHuawei xPON ONT.