1. Yintoni i-XGS-PON?
ZombiniI-XG-PONkwaye i-XGS-PON zezakwa-I-GPONuthotho. Ukusuka kwimephu yendlela yobugcisa, i-XGS-PON yindlela entsha yobuchwepheshe ye-XG-PON.
Zombini i-XG-PON kunye ne-XGS-PON ziyi-10G PON, umahluko ophambili ngulo: i-XG-PON yi-PON engalinganiyo, izinga lokunyuka/lokuhla kwezibuko ze-PON yi-2.5G/10G; i-XGS-PON yi-PON engalinganiyo, izinga lokunyuka/lokuhla kwezibuko ze-PON Izinga yi-10G/10G.
Iiteknoloji eziphambili zePON ezisetyenziswayo ngoku yiGPON kunye neXG-PON, zombini ezi zi-PON ezingalinganiyo. Ekubeni idatha yomsebenzisi ye-upstream/downlink ngokubanzi ingafaniyo, xa sijonga isixeko esithile sokuqala njengomzekelo, i-avareji ye-upstream traffic ye-OLT yi-22% kuphela ye-downstream traffic. Ke ngoko, iimpawu zobugcisa ze-asymmetric PON zihambelana neemfuno zabasebenzisi. hambelana. Okubaluleke ngakumbi, izinga lokunyuka kwe-asymmetric PON liphantsi, iindleko zokuthumela izinto ezifana nee-laser kwi-ONU ziphantsi, kwaye ixabiso lezixhobo liphantsi ngokufanayo.
Nangona kunjalo, iimfuno zomsebenzisi zahlukile. Ngokukhula kweenkonzo zokusasaza bukhoma kunye nokujonga ividiyo, kukho iimeko ezininzi apho abasebenzisi banikela ingqalelo ngakumbi kwi-bandwidth ye-uplink. Imigca ezinikeleyo engenayo kufuneka ibonelele ngeesekethe ze-uplink/downlink ezilinganayo. La mashishini akhuthaza imfuno ye-XGS-PON.
2. Ukuhlalisana kwe-XGS-PON, i-XG-PON kunye ne-GPON
I-XGS-PON yindlela entsha yobuchwepheshe ye-GPON kunye ne-XG-PON, kwaye ixhasa ukufikelela okuxutyiweyo kweentlobo ezintathu ze-ONU: i-GPON, i-XG-PON kunye ne-XGS-PON.
2.1 Ukuhlalisana kwe-XGS-PON kunye ne-XG-PON
Njenge-XG-PON, i-downlink ye-XGS-PON isebenzisa indlela yokusasaza, kwaye i-uplink isebenzisa indlela ye-TDMA.
Ekubeni ubude be-wavelength kunye nesantya se-downstream se-XGS-PON kunye ne-XG-PON zifana, i-downstream ye-XGS-PON ayihlukanisi phakathi kwe-XGS-PON ONU kunye ne-XG-PON ONU, kwaye i-optical splitter isasaza i-downstream optical signal kwi-ODN link efanayo. Kwi-XG(S)-PON (XG-PON kunye ne-XGS-PON) ONU nganye, i-ONU nganye ikhetha ukufumana isignali yayo kwaye ilahla ezinye izibonakaliso.
Uqhagamshelwano oluphezulu lwe-XGS-PON lwenza udluliselo lwedatha ngokweendawo zexesha, kwaye i-ONU ithumela idatha kwiindawo zexesha ezivunyelwe yi-OLT. I-OLT yabela ngokuguquguqukayo iindawo zexesha ngokweemfuno zethrafikhi ze-ONU ezahlukeneyo kunye nohlobo lwe-ONU (ingaba yi-XG-PON okanye i-XGS-PON?). Kwindawo yexesha eyabelwe i-XG-PON ONU, izinga lodluliselo lwedatha yi-2.5Gbps; kwisithuba sexesha eyabelwe i-XGS-PON ONU, izinga lodluliselo lwedatha yi-10Gbps.
Kuyabonakala ukuba i-XGS-PON ngokwendalo ixhasa ukufikelela okuxutyiweyo ngeentlobo ezimbini ze-ONU, i-XG-PON kunye ne-XGS-PON.
2.2 Ukuhlalisana kwe-XGS-PON kunyeI-GPON
Ekubeni ubude be-uplink/downlink bahlukile kobe-GPON, i-XGS-PON isebenzisa isisombululo seCombo ukwabelana nge-ODN ne-GPON. Ukuze ufumane umgaqo wesisombululo seCombo, jonga inqaku elithi “Ingxoxo ngeSisombululo sokuphucula ukusetyenziswa kwezixhobo ze-XG-PON kwiBhodi yabaBhali beCombo”.
Imodyuli ye-Combo optical ye-XGS-PON idibanisa imodyuli ye-GPON optical, imodyuli ye-XGS-PON optical kunye ne-WDM multiplexer.
Kwicala elingasentla, emva kokuba isignali ye-optical ingenile kwi-XGS-PON Combo port, i-WDM ihluza isignali ye-GPON kunye nesignali ye-XGS-PON ngokwe-wavelength, ize ithumele isignali kwiitshaneli ezahlukeneyo.
Kwicala le-downlink, imiqondiso evela kwitshaneli ye-GPON kunye netshaneli ye-XGS-PON ziyaphindaphindeka nge-WDM, kwaye isignali exutyiweyo iyancitshiswa kwi-ONU nge-ODN. Ekubeni i-wavelengths zahlukile, iintlobo ezahlukeneyo ze-ONU zikhetha i-wavelengths ezifunekayo ukuze zifumane imiqondiso ngeefilitha zangaphakathi.
Ekubeni i-XGS-PON ngokwendalo ixhasa ukuhlala kunye ne-XG-PON, isisombululo seCombo se-XGS-PON sixhasa ukufikelela okuxutyiweyo kwe-GPON, i-XG-PON kunye ne-XGS-PON iintlobo ezintathu ze-ONU. I-Combo optical module ye-XGS-PON ikwabizwa ngokuba yi-three Mode Combo optical module (i-XG-PON's Combo optical module ibizwa ngokuba yi-two-mode Combo optical module kuba ixhasa ukufikelela okuxutyiweyo kwe-GPON kunye ne-XG-PON iintlobo ezimbini ze-ONU).
3. Imeko yeMarike
Ichatshazelwa yindleko yezixhobo kunye nokuvuthwa kwezixhobo, ixabiso lezixhobo zangoku ze-XGS-PON liphezulu kakhulu kunele-XG-PON. Phakathi kwazo, ixabiso leyunithi ye-OLT (kuquka ibhodi yomsebenzisi yeCombo) liphezulu malunga ne-20%, kwaye ixabiso leyunithi ye-ONU liphezulu ngaphezu kwe-50%.
Nangona imigca ezinikeleyo engenayo kufuneka ibonelele ngeesekethe ezilinganayo ze-uplink/downlink, ithrafikhi yokwenyani yemigca ezinikeleyo engenayo isalawulwa yile ndlela ilandelayo yokuziphatha. Nangona kukho iimeko ezininzi apho abasebenzisi banikela ingqalelo ngakumbi kwi-bandwidth ye-uplink, phantse akukho mzekelo weenkonzo ezingenakufikelela kwi-XG-PON kodwa kufuneka zifikelelwe nge-XGS-PON.
Ixesha lokuthumela: Epreli-12-2023