Yini i-xPON

Njengesizukulwane esisha sobuchwepheshe bokufinyelela kwe-fiber optical, i-XPON inezinzuzo ezinkulu ekulweni nokuphazamiseka, izici zomkhawulokudonsa, ibanga lokufinyelela, ukugcinwa nokuphathwa, njll. Isicelo sayo sidonse ukunakwa okukhulu kubaqhubi bomhlaba.Ubuchwepheshe be-XPON bokufinyelela optical buyi-EPON evuthiwe futhi i-GPON yomibili yakhiwe ihhovisi elimaphakathi i-OLT, okokusebenza okuseceleni komsebenzisi kwe-ONU kanye nenethiwekhi yokusabalalisa ebonakalayo ye-ODN.Phakathi kwazo, inethiwekhi ye-ODN kanye nemishini kuyingxenye ebalulekile yokufinyelela okuhlanganisiwe kwe-XPON, okubandakanya ukwakheka nokusetshenziswa kwenethiwekhi entsha ye-fiber optical.Imishini ehlobene ye-ODN nezindleko zokuxhumana seziphenduke izinto ezibalulekile ezikhawulela izinhlelo zokusebenza ze-XPON.

Umqondo

Okwamanje, ubuchwepheshe be-xPON obuvame ukuba nethemba lomkhakha buhlanganisa i-EPON ne-GPON.

Ubuchwepheshe be-GPON (Gigabit-CapablePON) yisizukulwane sakamuva se-broadband passive optical integrated access standard based on the ITU-TG.984.x standard.Inezinzuzo eziningi ezifana nomkhawulokudonsa ophezulu, ukusebenza kahle okuphezulu, ukumbozwa okukhulu, nokuxhumana okucebile komsebenzisi.Abasebenzisi bakubheka njengobuchwepheshe obufanele ukwenza i-broadband kanye noshintsho oluphelele lwezinsiza zenethiwekhi.Izinga eliphezulu eliphansi lomfula we-GPON ngu-2.5Gbps, umugqa okhuphukayo ungu-1.25Gbps, futhi isilinganiso esiphezulu sokuhlukanisa ngu-1:64.

I-EPON iwuhlobo lobuchwepheshe obusafufusa bokufinyelela ku-broadband, obuqaphela ukufinyelela kwesevisi okudidiyelwe kwedatha, izwi nevidiyo ngohlelo olulodwa lokufinyelela i-fiber optical, futhi linokusebenza kahle kwezomnotho.I-EPON izoba ubuchwepheshe bokufinyelela be-broadband obujwayelekile.Ngenxa yezimpawu zesakhiwo senethiwekhi ye-EPON, izinzuzo ezikhethekile zokufinyelela kwe-broadband ekhaya, kanye nenhlanganisela yemvelo yemvelo namanethiwekhi wamakhompiyutha, ochwepheshe emhlabeni wonke bayavuma ukuthi amanethiwekhi optical passive awukufezeka "kwamanethiwekhi amathathu kwelinye" futhi isixazululo kuthelawayeka wolwazi.Indlela yokudlulisa ehamba phambili "yemayela lokugcina".

Isizukulwane esilandelayo sesistimu yenethiwekhi ye-PON xPON:

Nakuba i-EPON ne-GPON inobuchwepheshe bayo obuhlukene, bane-topology yenethiwekhi efanayo kanye nesakhiwo sokuphatha inethiwekhi efanayo.Zombili ziqondiswe kuhlelo lokusebenza lwenethiwekhi yokufinyelela okubonakalayo efanayo futhi azihlanganisi.Isistimu yenethiwekhi ye-PON yesizukulwane esilandelayo i-xPON ingasekela ngesikhathi esifanayo.Lawa mazinga amabili, okungukuthi, imishini ye-xPON ingahlinzeka ngezindlela ezihlukene zokufinyelela kwe-PON ngokwezidingo ezihlukene zabasebenzisi, futhi ixazulule inkinga yokungahambelani kobuchwepheshe obubili.Ngesikhathi esifanayo, uhlelo lwe-xPON lunikeza inkundla yokuphatha inethiwekhi ebumbene engakwazi ukuphatha izidingo zebhizinisi ezihlukahlukene, ibone isevisi ephelele (kuhlanganise ne-ATM, Ethernet, TDM) amakhono okusekela ngesiqinisekiso esiqinile se-QoS, futhi isekele ukudluliswa kwe-TV yekhebula engezansi nge-WDM;ngesikhathi esifanayo, ingakwazi ukukhomba ngokuzenzakalelayo i-EPON, ikhadi le-GPON Access liyanezelwa futhi lihoxiswe;iyahambisana ngempela namanethiwekhi e-EPON kanye ne-GPON ngesikhathi esisodwa.Kubaphathi benethiwekhi, konke ukuphatha nokumisa okwebhizinisi, kungakhathaliseki ukuthi yimuphi umehluko wezobuchwepheshe phakathi kwe-EPON ne-GPON.Okusho ukuthi, ukuqaliswa kobuchwepheshe kwe-EPON ne-GPON kubonakala kubaphathi benethiwekhi, futhi umehluko phakathi kwalokhu okubili uvikelekile futhi unikezwa ku-interface ehlanganisiwe ye-upper-layer.Inkundla yokuphatha inethiwekhi ehlanganisiwe ingenye yezinzuzo ezinkulu zalolu hlelo, eqaphela ngempela ukuhlanganiswa kobuchwepheshe obubili obuhlukene be-PON ezingeni lokuphatha inethiwekhi.

Imingcele eyinhloko nezinkomba zobuchwepheshe

Imingcele eyinhloko yenethiwekhi ye-xPON imi kanje:

● Amandla okusekelwa kwezinsizakalo eziningi: ukuzuza isevisi ephelele (okuhlanganisa i-ATM, i-Ethernet, i-TDM) amandla okusekela anesiqinisekiso esiqinile se-QoS, ukuthuthukiswa kwebhizinisi, ukusekela ukuhanjiswa kwe-TV ye-downlink nge-WDM;

● Ukuhlonza okuzenzakalelayo nokuphathwa kwamakhadi okufinyelela e-EPON kanye ne-GPON;

●Ukusekela 1:32 ikhono legatsha;

●Ibanga lokudlulisela alikho ngaphezu kwamakhilomitha angama-20;

●Isilinganiso somugqa wokulinganisa okhuphukayo nowehlayo ongu-1.244Gbit/s.Sekela umsebenzi wezibalo zethrafikhi echwebeni;

●Sekela umsebenzi wokwabiwa komkhawulokudonsa oguqukayo nomile.

●Sekela imisebenzi yokusakaza okuningi neyokusakaza okuningi

Izinkomba zobuchwepheshe eziyinhloko zenethiwekhi ye-xPON:

(1) Umthamo wesistimu: Uhlelo lunomthamo omkhulu wokushintsha i-IP (30G) ukuhlinzeka nge-interface yenethiwekhi ye-10G Ethernet, futhi i-OLT ngayinye ingasekela amanethiwekhi we-PON angu-36.

(2) I-interface yesevisi eminingi: Isekela i-TDM, i-ATM, i-Ethernet, i-CATV, futhi inikeze isiqinisekiso esiqinile se-QoS, esingafaka ngokugcwele izinsizakalo ezikhona.Isekela ngempela ukuthuthukiswa okushelelayo kwebhizinisi.

(3) Ukuthembeka okuphezulu kwesistimu kanye nezidingo zokutholakala: Uhlelo luhlinzeka ngendlela yokuzikhethela yokuvikela engu-1+1 ukuze ihlangabezane ngokugcwele nezimfuneko zenethiwekhi yokuxhumana ngocingo ngokwethembeka kwenethiwekhi, futhi isikhathi sokushintsha singaphansi kwama-50ms.

(4) Ibanga lenethiwekhi: indlela yenethiwekhi engu-10,20Km elungisekayo, ihlangabezana ngokugcwele nezimfuneko zenethiwekhi yokufinyelela.

(5) Iplathifomu yesofthiwe yokuphathwa kwesistimu ehlanganisiwe: Ngezindlela ezahlukene zokufinyelela, yiba nenkundla yokuphatha inethiwekhi ehlangene

Isakhiwo

I-Passive optical fibre network system iwuhlelo lokudlulisa i-fiber broadband oluhlanganisa i-optical line terminal (OLT), i-optical distribution network (ODN), kanye ne-optical network unit (ONU), ebizwa ngokuthi i-PON system.Imodeli yereferensi yesistimu ye-PON iboniswa kuMfanekiso 1.

Uhlelo lwe-PON lwamukela ukwakheka kwenethiwekhi ye-point-to-multipoint, isebenzisa inethiwekhi yokusabalalisa optical passive njengendlela yokudlulisa, isebenzisa imodi yokusakaza ku-downlink, kanye nemodi yokusebenza ye-TDM ku-uplink, eqaphela ukudluliswa kwesignali ye-fiber bidirectional eyodwa.Uma kuqhathaniswa nenethiwekhi yokufinyelela evamile, uhlelo lwe-PON lunganciphisa ukusetshenziswa kokufinyelela ekamelweni lekhompyutha futhi lufinyelele izintambo ezibonakalayo, lwandise ukumbozwa kwenethiwekhi yendawo yokufinyelela, lwandise izinga lokufinyelela, lunciphise izinga lokuhluleka kwemigqa nemishini yangaphandle, futhi ngcono ukwethembeka kohlelo.Ngesikhathi esifanayo, iphinde isindise izindleko zokulungisa, ngakho-ke uhlelo lwe-PON luwubuchwepheshe bokusebenzisa obuyinhloko benethiwekhi ye-NGB yokufinyelela ngezindlela ezimbili.

Ngokusho kwamafomethi ahlukene wokudlulisa isignali wesistimu, ingabizwa ngokuthi i-xPON, njenge-APON, BPON, EPON, GPON ne-WDM-PON.I-GPON ne-EPON zisetshenziswe kabanzi emhlabeni wonke, futhi kukhona nezinhlelo zokusebenza ezinkulu ekuguquleni amanethiwekhi omsakazo kanye nomabonakude anezindlela ezimbili.I-WDM-PON iwuhlelo olusebenzisa iziteshi ezizimele ze-wavelength phakathi kwe-OLT ne-ONU ukwenza uxhumano lwephoyinti nephoyinti.Uma kuqhathaniswa ne-TDM- efana ne-EPON ne-GPON, i-PON ne-WDM-PON inezinzuzo zomkhawulokudonsa ophezulu, ukucaca kwephrothokholi, ukuphepha nokuthembeka, kanye nokukala okuqinile.Ziyisiqondiso sentuthuko yesikhathi esizayo.Esikhathini esifushane, ngenxa yezimiso eziyinkimbinkimbi ze-WDM-PON, izintengo eziphakeme zedivayisi, kanye nezindleko eziphezulu zesistimu, ayikabi nazo izimo zezicelo ezinkulu.

Izinkomba zobuchwepheshe eziyinhloko ze-xPON

①Umthamo wesistimu: Uhlelo lunomgogodla wokushintsha we-IP (30G), luhlinzeka ngenethiwekhi ye-10G Ethernet, futhi i-OLT ngayinye ingasekela ama-PON angu-36;

②Isixhumi esibonakalayo sezinsizakalo eziningi: isekela i-TDM, i-ATM, i-Ethernet, i-CATV, futhi inikeze isiqinisekiso esiqinile se-QoS, ingamunca ngokugcwele ibhizinisi elikhona, futhi isekele ngempela ukuthuthukiswa okushelelayo kwebhizinisi;

③ Izidingo zokwethembeka okuphezulu kwesistimu nokutholakala: Uhlelo luhlinzeka ngendlela yokuzikhethela engu-1+1 yokushintsha ukuze kuhlangatshezwane ngokugcwele nezimfuneko zenethiwekhi yokuxhumana ngocingo ngokwethembeka kwenethiwekhi, futhi isikhathi sokushintsha singaphansi kwama-50m;

④Ibanga lenethiwekhi: 10-20km ububanzi benethiwekhi bungalungiselelwa ukuhlangabezana ngokugcwele nezimfuneko zenethiwekhi yokufinyelela;

⑤Iplathifomu yesofthiwe yokuphathwa kwesistimu ehlanganisiwe: Ezindleleni ezihlukene zokufinyelela, inenkundla yokuphatha inethiwekhi ehlanganisiwe.

I-HUANET ikhiqiza izinhlobo eziningi ze-xPON ONU, i-xPON ONT, ehlanganisa i-1GE xPON ONU, 1GE+1FE+CATV+WIFI xPON ONT, 1GE+1FE+CATV+POTS+WIFI xPON ONU, 1GE+3FE+POTS+WIFI xPON ONT.Futhi sihlinzeka nge-Huawei xPON ONT.