Yintoni i-xPON

Njengesizukulwana esitsha seteknoloji yokufikelela kwi-fiber optical, i-XPON ineenzuzo ezinkulu kwi-anti-interference, iimpawu ze-bandwidth, umgama wokufikelela, ukugcinwa kunye nokulawula, njl.Itekhnoloji ye-XPON yokufikelela kwi-optical access ikhulile ngokwe-EPON kunye ne-GPON zombini ziqulunqwe yi-ofisi ephakathi ye-OLT, izixhobo ze-ONU ezisecaleni komsebenzisi kunye ne-passive optical network network ODN.Phakathi kwabo, inethiwekhi ye-ODN kunye nezixhobo ziyinxalenye ebalulekileyo ye-XPON yokufikelela okudibeneyo, okubandakanya ukuqulunqwa kunye nokusetyenziswa kwenethiwekhi entsha ye-fiber optical.Izixhobo ezinxulumene ne-ODN kunye neendleko zenethiwekhi ziye zaba yimiba ebalulekileyo ethintela izicelo ze-XPON.

Ingcamango

Okwangoku, ithekhinoloji yeXPON enethemba loshishino iquka iEPON kunye neGPON.

Iteknoloji yeGPON (Gigabit-CapablePON) sisizukulwana samva nje se-broadband passive optical edibeneyo yokufikelela umgangatho osekelwe kumgangatho we-ITU-TG.984.x.Ineenzuzo ezininzi ezinje nge-bandwidth ephezulu, ukusebenza kakuhle okuphezulu, ukugubungela okukhulu, kunye nojongano lomsebenzisi otyebileyo.Abanini-zithuthi bayithatha njengeteknoloji efanelekileyo yokufezekisa i-broadband kunye nenguqu ebanzi yokufikelela kwiinkonzo zenethiwekhi.Ubuninzi bezinga elisezantsi le-GPON yi-2.5Gbps, umgca onyukayo ngu-1.25Gbps, kwaye umlinganiselo ophezulu wokuhlukana ngu-1:64.

I-EPON luhlobo lweteknoloji yokufikelela kwi-broadband ekhulayo, eqonda ukufikelela kwenkonzo edibeneyo yedatha, ilizwi kunye nevidiyo ngokusebenzisa inkqubo yokufikelela kwi-fiber optical, kwaye inokusebenza kakuhle kwezoqoqosho.I-EPON iya kuba yitekhnoloji yokufikelela kwibroadband eqhelekileyo.Ngenxa yeempawu zesakhiwo senethiwekhi ye-EPON, iingenelo ezikhethekileyo zokufikelela kwi-broadband ekhaya, kunye nendibaniselwano yendalo yendalo kunye nothungelwano lwekhompyuter, iingcali kwihlabathi liphela ziyavuma ukuba uthungelwano lwe-passive optical kukufezekiswa "kwenethiwekhi ezintathu kwelinye" kwaye isisombululo kuhola wendlela wolwazi.Eyona ndlela yosasazo “yemayile yokugqibela”.

Isizukulwana esilandelayo se-PON yenethiwekhi ye-xPON:

Nangona i-EPON kunye ne-GPON banobuchwepheshe babo obahlukeneyo, bane-topology yenethiwekhi efanayo kunye nesakhiwo solawulo lwenethiwekhi efanayo.Zombini zijoliswe kwisicelo sothungelwano sokufikelela kwi-optical efanayo kwaye azikho non-convergence.Inkqubo yenethiwekhi yePON yesizukulwana esilandelayo iXPON inokuxhasa ngaxeshanye.Le migangatho mibini, oko kukuthi, izixhobo ze-xPON zinokubonelela ngeendlela ezahlukeneyo zokufikelela kwe-PON ngokweemfuno ezahlukeneyo zabasebenzisi, kunye nokusombulula ingxaki yokungahambelani kobuchwephesha obubini.Ngexesha elifanayo, inkqubo ye-xPON ibonelela ngeqonga lolawulo lwenethiwekhi edibeneyo enokulawula iimfuno ezahlukeneyo zoshishino, ukuqonda inkonzo epheleleyo (kuquka i-ATM, i-Ethernet, i-TDM) amandla okuxhasa ngesiqinisekiso esingqongqo se-QoS, kunye nokuxhasa ukuhanjiswa kwe-TV ye-cable ephantsi nge-WDM;ngelo xesha, inokuchonga ngokuzenzekelayo i-EPON, ikhadi le-GPON Access longezwa kwaye lihoxisiwe;iyahambelana ngokwenene ne-EPON kunye neenethiwekhi zeGPON ngaxeshanye.Kubaphathi benethiwekhi, lonke ulawulo kunye noqwalaselo lolweshishini, kungakhathaliseki umahluko wezobugcisa phakathi kweEPON kunye neGPON.Oko kukuthi, ukuphunyezwa kobugcisa be-EPON kunye ne-GPON kucacile kulawulo lwenethiwekhi, kwaye umehluko phakathi kwezi zibini zikhuselekile kwaye zinikezelwe kwi-interface edibeneyo yomgangatho ophezulu.Iqonga elidityanisiweyo lolawulo lwenethiwekhi yenye yeenzuzo ezinkulu zale nkqubo, eqonda ngokwenene ukudityaniswa kweetekhnoloji ezimbini ezahlukeneyo zePON kwinqanaba lolawulo lwenethiwekhi.

Iiparamitha eziphambili kunye nezalathi zobugcisa

Iiparamitha eziphambili zenethiwekhi ye-xPON zezi zilandelayo:

● Izakhono zokuxhasa iinkonzo ezininzi: ukufikelela kwinkonzo epheleleyo (kubandakanya i-ATM, i-Ethernet, i-TDM) amandla okuxhasa ngesiqinisekiso esingqongqo seQoS, ukwenzela ukulungelelanisa ishishini, ukuxhasa i-downlink cable TV transmission nge-WDM;

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

● Inkxaso 1:32 isakhono sesebe;

● Umgama wothumelo awukho ngaphezu kweekhilomitha ezingama-20;

●Umntla kunye nomgangatho we-symmetric line 1.244Gbit / s.Ukuxhasa umsebenzi weenkcukacha-manani zezithuthi zezibuko;

● Inkxaso eguquguqukayo kunye nomsebenzi wolwabiwo we-static bandwidth.

● Xhasa usasazo oluninzi kunye nemisebenzi emininzi

Ezona zalathisi zobugcisa eziphambili zenethiwekhi ye-xPON:

(1) Umthamo weNkqubo: Inkqubo inomthamo omkhulu wokutshintsha i-IP (30G) ukubonelela nge-interface ye-10G ye-Ethernet yenethiwekhi, kwaye i-OLT nganye inokuxhasa i-36 iinethiwekhi ze-PON.

(2) I-interface yeenkonzo ezininzi: Inkxaso ye-TDM, i-ATM, i-Ethernet, i-CATV, kunye nokubonelela ngesiqinisekiso esingqongqo se-QoS, esinokubandakanya ngokupheleleyo iinkonzo ezikhoyo.Ixhasa ngokwenene uphuculo olugudileyo lweshishini.

(3) Inkqubo yokuthembeka okuphezulu kunye neemfuno zokufumaneka: Inkqubo inikezela ngokuzikhethela kwe-1 + 1 indlela yokutshintsha ukhuseleko ukuze ihlangabezane ngokupheleleyo neemfuno zenethiwekhi yonxibelelwano yokuthembeka kwenethiwekhi, kwaye ixesha lokutshintsha lingaphantsi kwe-50ms.

(4) Uluhlu lwenethiwekhi: ulungelelwaniso lwe-10,20Km yenethiwekhi yendlela, ukuhlangabezana ngokupheleleyo neemfuno zokufikelela kwinethiwekhi.

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

Ulwakhiwo

Inkqubo ye-passive optical fiber network yinkqubo yokuhanjiswa kwe-fiber broadband eyenziwe nge-terminal optical line (OLT), i-optical distribution network (ODN), kunye neyunithi ye-optical network (ONU), ebizwa ngokuba yi-PON system.Imodeli yesalathiso ye-PON iboniswe kuMfanekiso 1.

Inkqubo ye-PON ithatha i-point-to-multipoint network structure, isebenzisa inethiwekhi yokusabalalisa i-optical passive njengendlela yokuhambisa, isebenzisa imodi yokusasazwa kwi-downlink, kunye nemodi yokusebenza ye-TDM kwi-uplink, eqonda ukuhanjiswa kwesignali ye-fiber-fiber bidirectional.Xa kuthelekiswa nenethiwekhi yokufikelela yendabuko, inkqubo ye-PON inokunciphisa ukusetyenziswa kokufikelela kwigumbi lekhompyutha kunye nokufikelela kwiintambo ze-optical, ukwandisa ukugubungela inethiwekhi ye-node yokufikelela, ukwandisa izinga lokufikelela, ukunciphisa izinga lokungaphumeleli kwemigca kunye nezixhobo zangaphandle, kwaye ukuphucula ukuthembeka kwenkqubo.Ngelo xesha, iphinda igcine iindleko zokugcinwa, ngoko ke inkqubo ye-PON yiteknoloji yesicelo esiphambili se-NGB yokufikelela kwiindlela ezimbini.

Ngokweendlela ezahlukeneyo zokuhambisa umqondiso wenkqubo, ingabizwa ngokuba yi-xPON, njenge-APON, i-BPON, i-EPON, i-GPON kunye ne-WDM-PON.I-GPON kunye ne-EPON ziye zasasazwa ngokubanzi kwihlabathi jikelele, kwaye kukho izicelo ezinkulu kwinguqu yonomathotholo kunye nomabonakude ngeendlela ezimbini.I-WDM-PON yinkqubo esebenzisa iziteshi ezizimeleyo ze-wavelength phakathi kwe-OLT kunye ne-ONU ukwenza uxhumano lwe-point-to-point.Xa kuthelekiswa ne-TDM-njenge-EPON kunye ne-GPON, i-PON kunye ne-WDM-PON ineenzuzo ze-bandwidth ephezulu, i-protocol transparency, ukhuseleko kunye nokuthembeka, kunye ne-scalability enamandla.Zizikhokelo zophuhliso lwexesha elizayo.Ngexesha elifutshane, ngenxa yemigaqo eyinkimbinkimbi ye-WDM-PON, amaxabiso aphezulu esixhobo, kunye neendleko eziphezulu zenkqubo, akukabikho iimeko zezicelo ezinkulu.

Iimpawu eziphambili zezobugcisa ze-xPON

① Umthamo weSistim: Inkqubo inomthamo omkhulu wokutshintsha i-IP (30G), ibonelela nge-interface yenethiwekhi ye-Ethernet ye-10G, kwaye i-OLT nganye inokuxhasa ii-PON ze-36;

②I-Multi-service interface: inkxaso ye-TDM, i-ATM, i-Ethernet, i-CATV, kunye nokubonelela ngesiqinisekiso esingqongqo se-QoS, inokufunxa ngokupheleleyo ishishini elikhoyo, kwaye ixhase ngokwenene ukuphuculwa kweshishini;

③ Inkqubo yokuthembeka okuphezulu kunye neemfuno zokufumaneka: Inkqubo ibonelela ngeendlela zokutshintsha zokhuselo ze-1+1 ukuhlangabezana ngokupheleleyo neemfuno zothungelwano lonxibelelwano lokuthembeka kwenethiwekhi, kwaye ixesha lokutshintsha lingaphantsi kwe-50m;

④Uluhlu lwenethiwekhi: I-10-20km i-diameter yenethiwekhi ingaqwalaselwa ukuba ihlangabezane ngokupheleleyo neemfuno zenethiwekhi yokufikelela;

⑤Iqonga lesoftware yolawulo lwenkqubo emanyeneyo: Kwiindlela ezahlukeneyo zokufikelela, ineqonga lolawulo lothungelwano olumanyeneyo.

I-HUANET ivelisa iimodeli ezininzi ze-xPON ONU, xPON ONT, ziquka 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.