I-DOCSIS PHEZU KWEPON (D-PON)
I-Docsis phezu kwe-PON (i-D-PON) isiphakamiso sinikeza isisombululo se-CATV MSO ukubonelela ngeenkonzo ze-HDTV + Ethernet malunga ne-3000 FTTH umrhumi kuluntu olungaphantsi kwe-10Km umgama wefiber ukuya kwi-headend office. Umbhalisi ngamnye uya kuba ne-60ch + QAM imixholo ye-HDTV ye-channel ye-HDTV kunye ne-50Mbps yamandla e-broadband. I-RFoG micronode, i-CMTS kunye ne-CWDM zixhobo eziphambili kwesi siphakamiso.
I-SCTE yazisa i-RF phezu kweglasi (RFoG) esemgangathweni ye-SCTE-174-2010 kwiminyaka embalwa edlulileyo, ichaza indlela yokubuya kwendlela yokuqhuma evumela ukuba imodem yentambo enye ithumele umva idatha ngentambo yefayibha kwi-CMTS xa zonke iimodem zentambo zisetwe kwimowudi yeTDMA. Nge-RFoG, i-Cable MSO inokwandisa i-CMTS/inkonzo yeModem yeCable ukusuka kwinethiwekhi ye-HFC ukuya kwi-Fiber ukuya kwinethiwekhi yasekhaya (FTTH). Oku kubizwa ngokuba yi-DOCSIS phezu kweNethiwekhi ye-Passive Optical (D-PON). I-D-PON isekela i-1x32 i-splitter ye-optical kwi-20Km umgama wefiber okanye i-1x64 ye-optical splitter kwi-10Km umgama wefiber.
Siye sazisa kwakhona i-Docsis 3.0 mini-CMTS esekwe kumgangatho we-C-DOCSIS. I-GmCMTS30 ine-16ch iziteshi ezihlayo kunye neziteshi ezi-4 ezinyukayo, ezixhasa i-docsis 2.0 kunye ne-docsis 3.0 i-modem zentambo. Kwi-256QAM, iziteshi ze-16 ze-DS zingabelana nge-800Mbps i-bandwidth, oku kuthetha ukuba kubabhalisi bemodem ye-cable ye-256, isantya esicocekileyo se-Ethernet sinokuba malunga ne-50Mbps.
Ngokudityaniswa okugqibeleleyo kwe-CMTS kunye ne-D-PON, i-Cable MSO inokubonelela nge-HDTV ekhuphisanayo kunye neenkonzo ze-intanethi eziPhezulu ngexabiso elifikelelekayo. Ngefayibha ekhaya, konke ukugcinwa kwenkqubo kunye nokuphucula kuba lula kakhulu.
Kwinkqubo ye-Docsis 3.1 okanye i-Docsis 4.0 ecela ukuxhamla kwi-channel yendlela yokubuyisela kwi-bandwidth ephantsi ye-CATV, ukuphazamiseka kwe-optical beat interference (OBI) yinto enzima kakhulu kwinkqubo ye-PON. Nge-laser ye-laser ye-CWDM eyakhelwe kwi-laser ye-return kwi-window ekhethiweyo ye-optical window, i-GFH2009 RFoG Micronode iqonda imfuno ye-OBI yamahhala kwi-budget yezoqoqosho, enenzuzo yokusasaza amakhulu e-TV ye-HD kunye nokwabelana ngedatha ye-Ethernet ye-10Gbps.
Jonga i-D-PON isiphakamiso somzobo womnatha kunye ne-D-PON ye-headend yesixhobo sokudibanisa umzobo.
