1. Kuyini i-XGS-PON?
KokubiliI-XG-PONkanye ne-XGS-PON kungokwe-I-GPONuchungechunge. Kusukela kumephu yobuchwepheshe, i-XGS-PON iyinguquko yezobuchwepheshe ye-XG-PON.
Zombili i-XG-PON kanye ne-XGS-PON ziyi-10G PON, umehluko omkhulu uwukuthi: i-XG-PON iyi-PON engalingani, izinga lokuxhumanisa/lokudiliza lembobo ye-PON lingu-2.5G/10G; i-XGS-PON iyi-PON elinganayo, izinga lokuxhumanisa/lokudiliza lembobo ye-PON Izinga lingu-10G/10G.
Ubuchwepheshe obuyinhloko be-PON obusetshenziswa njengamanje yi-GPON ne-XG-PON, zombili eziyi-PON engalingani. Njengoba idatha yomsebenzisi ye-upstream/downlink ngokuvamile ingafani, uma sibheka idolobha elithile lesigaba sokuqala njengesibonelo, isilinganiso se-upstream traffic ye-OLT singama-22% kuphela we-downstream traffic. Ngakho-ke, izici zobuchwepheshe ze-asymmetric PON zihlobene ngokuyisisekelo nezidingo zabasebenzisi. Okubaluleke kakhulu, izinga lokuxhumanisa le-asymmetric PON liphansi, izindleko zokuthumela izingxenye ezifana nama-laser ku-ONU ziphansi, futhi intengo yemishini iphansi ngokufanayo.
Kodwa-ke, izidingo zomsebenzisi ziyahlukahluka. Njengoba ukwanda kwezinsizakalo zokusakaza bukhoma kanye nokuqapha ividiyo, kunezimo eziningi lapho abasebenzisi benaka kakhulu i-bandwidth ye-uplink. Imigqa ezinikele engenayo idinga ukuhlinzeka ngezifunda ze-uplink/downlink ezilinganayo. Lawa mabhizinisi akhuthaza isidingo se-XGS-PON.
2. Ukuhlalisana kwe-XGS-PON, i-XG-PON kanye ne-GPON
I-XGS-PON iyinguquko yezobuchwepheshe ye-GPON ne-XG-PON, futhi isekela ukufinyelela okuxubile kwezinhlobo ezintathu ze-ONU: i-GPON, i-XG-PON kanye ne-XGS-PON.
2.1 Ukuhlalisana kwe-XGS-PON kanye ne-XG-PON
Njenge-XG-PON, i-downlink ye-XGS-PON isebenzisa indlela yokusakaza, kanti i-uplink isebenzisa indlela ye-TDMA.
Njengoba ubude be-wavelength kanye nesilinganiso se-downstream se-XGS-PON kanye ne-XG-PON zifana, i-downstream ye-XGS-PON ayihlukanisi phakathi kwe-XGS-PON ONU kanye ne-XG-PON ONU, futhi i-optical splitter isakaza isignali ye-optical engezansi kusixhumanisi esifanayo se-ODN Ku-XG(S)-PON (XG-PON kanye ne-XGS-PON) ONU ngayinye, i-ONU ngayinye ikhetha ukuthola isignali yayo futhi ilahla ezinye izimpawu.
Ukuxhumeka kwe-XGS-PON kwenza ukudluliswa kwedatha ngokwezikhathi, kanti i-ONU ithumela idatha ngezikhathi ezivunyelwe yi-OLT. I-OLT yabela ngokuguquguqukayo izikhala zesikhathi ngokwezidingo zethrafikhi zama-ONU ahlukene kanye nohlobo lwe-ONU (ingabe yi-XG-PON noma i-XGS-PON?). Esikhathini sesikhathi esabelwe i-XG-PON ONU, izinga lokudluliswa kwedatha lingu-2.5Gbps; ngesikhathi esabelwe i-XGS-PON ONU, izinga lokudluliswa kwedatha lingu-10Gbps.
Kungabonakala ukuthi i-XGS-PON isekela ngokwemvelo ukufinyelela okuxubile ngezinhlobo ezimbili ze-ONU, i-XG-PON kanye ne-XGS-PON.
2.2 Ukuhlalisana kwe-XGS-PON kanyeI-GPON
Njengoba ubude be-uplink/downlink buhlukile kobe-GPON, i-XGS-PON isebenzisa isisombululo se-Combo ukuze yabelane nge-ODN ne-GPON. Ukuze uthole isimiso sesisombululo se-Combo, bheka isihloko esithi “Ingxoxo ngesisombululo sokuthuthukisa ukusetshenziswa kwezinsiza ze-XG-PON kweBhodi yababhalisile be-Combo”.
I-Combo optical module ye-XGS-PON ihlanganisa i-GPON optical module, i-XGS-PON optical module kanye ne-WDM multiplexer.
Ngasohlangothini oluya phezulu, ngemva kokuba isignali yokukhanya ingena echwebeni le-XGS-PON Combo, i-WDM ihlunga isignali ye-GPON kanye nesignali ye-XGS-PON ngokuya ngobude be-wavelength, bese ithumela isignali eziteshini ezahlukene.
Esiqondisweni sokuxhumanisa, izimpawu ezivela esiteshini se-GPON kanye nesiteshi se-XGS-PON ziyaphindaphindwa nge-WDM, futhi isignali exubile ixhunywa nge-ONU nge-ODN. Njengoba ubude be-wavelength buhlukile, izinhlobo ezahlukene ze-ONU zikhetha ubude be-wavelength obudingekayo ukuze zithole izimpawu ngezihlungi zangaphakathi.
Njengoba i-XGS-PON isekela ngokwemvelo ukuhlala ndawonye ne-XG-PON, isixazululo se-Combo se-XGS-PON sisekela ukufinyelela okuxubile kwezinhlobo ezintathu ze-ONU ze-GPON, i-XG-PON kanye ne-XGS-PON. I-Combo optical module ye-XGS-PON ibizwa nangokuthi i-Three Mode Combo optical module (i-XG-PON's Combo optical module ibizwa ngokuthi i-two-mode Combo optical module ngoba isekela ukufinyelela okuxubile kwe-GPON kanye ne-XG-PON izinhlobo ezimbili ze-ONU).
3. Isimo Semakethe
Ithintwa yizindleko zemishini kanye nokuvuthwa kwemishini, intengo yamanje yemishini ye-XGS-PON iphakeme kakhulu kuneye-XG-PON. Phakathi kwazo, intengo yeyunithi ye-OLT (kufaka phakathi ibhodi yomsebenzisi we-Combo) iphakeme cishe ngo-20%, kanti intengo yeyunithi ye-ONU iphakeme ngaphezu kuka-50%.
Nakuba imigqa ezinikele engenayo idinga ukuhlinzeka ngezifunda ezilinganayo ze-uplink/downlink, ithrafikhi yangempela yemigqa eminingi ezinikele engenayo isabuswa yilokhu kuziphatha okulandelayo. Nakuba kunezimo eziningi lapho abasebenzisi benaka kakhulu i-bandwidth ye-uplink, cishe azikho izinsizakalo ezingenakufinyelelwa nge-XG-PON kodwa okumele zifinyelelwe nge-XGS-PON.
Isikhathi sokuthunyelwe: Ephreli-12-2023