Title :
Comparisons of fiber-to-the-curb upgrade alternatives for multichannel digital video
Author :
Lu, Kevin W. ; Chapuran, Thomas E. ; Wagner, Stuart S.
Author_Institution :
Bellcore, Morristown, NJ, USA
Abstract :
Key technical and economic factors involved in transporting voice and video services over hybrid fiber/coax distribution networks are examined. Two upgrade architectures for providing multichannel digital video services as an overlay in a narrowband fiber-to-the-curb (FTTC) system with eight living units (LUs) per optical network unit (ONU) are investigated. The upgrade provides video subscribers with access to switched channels and to a menu of 140 multicast or broadcast channels, all digitally compressed to 4 Mb/s per channel. One of the upgrade architectures transports video channels in asynchronous transfer mode (ATM) cells using a wavelength division multiplexing (WDM) overlay from the host digital terminal (HDT) to upgraded ONUs, with coaxial drops to set-top converters at the customer premises. The alternative architecture uses subcarrier multiplexing (SCM) technqiues to transport video channels in 16-quadrature AM (QAM) format to video ONUs (V-ONUs) each serving 64 LUs through a coax-bus distribution
Keywords :
optical fibre subscriber loops; 16-quadrature AM; ATM cells; FTTC system; QAM; SCM; asynchronous transfer mode; broadcast channels; coax-bus distribution; coaxial drops; customer premises; host digital terminal; hybrid fiber/coax distribution networks; living units; multichannel digital video; narrowband fiber-to-the-curb; optical network unit; set-top converters; subcarrier multiplexing; switched channels; transport video channels; upgrade architectures; video services; voice services; wavelength division multiplexing; Asynchronous transfer mode; Coaxial components; Digital video broadcasting; Economics; Narrowband; Optical fiber networks; Optical network units; Video compression; Wavelength converters; Wavelength division multiplexing;
Conference_Titel :
Optical/Hybrid Access Networks, 1993., 5th Conference on
Conference_Location :
Montreal, Que.
Print_ISBN :
0-7803-1249-X
DOI :
10.1109/OHAN.1993.588650
