DOCSIS OVER PON (D-PON)
Hāʻawi ka Docsis ma luna o PON (D-PON) i ka hopena no ka CATV MSO e hāʻawi i nā lawelawe HDTV+Ethernet ma kahi o 3000 FTTH mea kākau ma ke kaiāulu o ka liʻiliʻi o 10Km fiber mamao i ke keʻena poʻo. E loaʻa i kēlā me kēia mea kūʻai aku he 60ch+ QAM channel HDTV contents a me 50Mbps broadband capability. ʻO RFoG micronode, CMTS a me CWDM nā mea hana nui i kēia noi.
Ua hoʻolaha ʻo SCTE iā RF ma luna o Glass (RFoG) maʻamau SCTE-174-2010 i kekahi mau makahiki i hala aku nei, e wehewehe ana i ke ala hoʻihoʻi burst mode e hiki ai i hoʻokahi kelepona modem e hoʻouna i ka ʻikepili hoʻohuli ma luna o ka fiber cable i CMTS ke hoʻonohonoho ʻia nā modem cable āpau ma ke ʻano TDMA. Me RFoG, hiki i ka Cable MSO ke hoʻonui i ka lawelawe CMTS/Cable Modem mai ka pūnaewele HFC a hiki i ka Fiber i ka pūnaewele home (FTTH). ʻO kēia ka mea i kapa ʻia ʻo DOCSIS ma luna o Passive Optical Network (D-PON). Kākoʻo ʻo D-PON i ka 1x32 optical splitter ma 20Km fiber mamao a i ʻole 1x64 optical splitter ma 10Km fiber mamao.
Ua hoʻokomo pū mākou i Docsis 3.0 mini-CMTS e pili ana i ka maʻamau C-DOCSIS. ʻO GmCMTS30 he 16ch downstreaming channel a me 4 upstreaming channels, e kākoʻo ana i docsis 2.0 a me docsis 3.0 cable modems. Ma 256QAM, 16 mau kaha DS i kaʻana like i ka bandwidth 800Mbps, ʻo ia hoʻi i 256 mau mea inoa modem cable, hiki i ka wikiwiki Ethernet maʻemaʻe ma kahi o 50Mbps.
Me ka hui kūpono o CMTS a me D-PON, hiki i ka Cable MSO ke hāʻawi aku i ka HDTV hoʻokūkū a me nā lawelawe pūnaewele kiʻekiʻe ma ke kumu kūʻai. Me ka fiber i ka home, ʻoi aku ka maʻalahi o ka mālama ʻana a me ka hoʻonui ʻana i ka ʻōnaehana.
I loko o ka ʻōnaehana o Docsis 3.1 a i ʻole Docsis 4.0 e noi ana i ka hoʻopaʻa ʻana i ke ala hoʻihoʻi hou aku i ka bandwidth CATV haʻahaʻa, ʻo ka optical beat interference (OBI) kahi mea paʻakikī i ka ʻōnaehana PON. Me ka laser ala hoʻihoʻi ʻole CWDM i kūkulu ʻia ma ka puka aniani i koho ʻia, ʻike ʻo GFH2009 RFoG Micronode i ka koi manuahi OBI ma kahi kālā hoʻokele waiwai, loaʻa nā pōmaikaʻi o ka hoʻolaha ʻana i nā haneli o nā TV HD a kaʻana like i ka ʻikepili 10Gbps Ethernet.
E ʻike i ke kaha kiʻi pūnaewele manaʻo D-PON a me ke kaha kiʻi hoʻokuʻi ʻana i nā lako poʻo D-PON.
