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Proceedings Paper

Transmission design in a multimode HFC network
Author(s): G. Keith Cambron
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Paper Abstract

Contemporary hybrid fiber coaxial (HFC) networks are capable of supporting a wide range of services including traditional analog video, telephony, digital video, and data services. Each service has unique performance or service requirements. This contribution examines transmission design for one such network. Pacific Bell's advanced communications network (ACN). The design methodology begins with a set of end to end service quality objectives. Network impairments, such as noise, distortion and delay, are allocated across the network elements using a set of standard network models. These models are a representative set of the actual field designs and bound the network operating parameters. Network components, headend equipment, and customer premises equipment are specified analytically or characterized empirically in relationship to the chosen impairment set. The component parameters are then included in analytical models to estimate overall network performance. In addition to the forward path transmission considerations examined by traditional coaxial network designers, other dimensions including power consumption, traffic demand, and message latency are taken into account. Analytical models are used to estimate the effects of multiple modulation schemes within the unified network. The variability introduced by on demand services such as telephony and interactive digital services changes the base computational domain from deterministic models to stochastic ones. These models are then used to set operating parameters at measurable points throughout the network for proof of performance prior to turn up, and for ongoing performance monitoring. For closure, empirical results are compared with model projections as a way of verifying and improving the predictive models.

Paper Details

Date Published: 4 November 1996
PDF: 7 pages
Proc. SPIE 2917, Broadband Access Systems, (4 November 1996); doi: 10.1117/12.257322
Show Author Affiliations
G. Keith Cambron, Pacific Bell (United States)


Published in SPIE Proceedings Vol. 2917:
Broadband Access Systems
Wai Sum Lai; Sam T. Jewell; Curtis A. Siller; Indra Widjaja; Dennis Karvelas; Indra Widjaja; Dennis Karvelas, Editor(s)

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