Broadband cable access networks for triple play services : source-destenation

Abstract

This paper evaluates the performance of sending Triple play Services over hybrid networks. The network performance factors will be considered by observing the network`s availability, packet loss, delay and throughput. These evaluations will be tested over different network scenario, where the last mile media services suggested to be delivered over telephone twisted pair by means of using ADSL. The attention will be concerned for services over cable, where a proposal of using bandwidth efficient turbo trellis coded modulation (TTCM) in ADSL DMT systems instead of the multidimensional 16-state Trellis Coded Modulation (MTCM) that is given as an option in Asymmetric Digital Subscriber Lines (ADSL) standard based on discrete multitone (DMT) techniques. The results show that by using turbo codes, it can obtain 6 dB coding gain for a bit error rate (BER) of 10-6 in AWGN channels and more than 6.8 dB coding gain for a BER of 10-7 using a concatenated coding scheme.