A cross-layer approach for evaluating the impact of single NEXT interferer in DMT based ADSL systems

Authors:
Indradip Ghosh;Kalyan Basu;Sumantra R. Kundu
Affiliations:
Center for Research in Wireless Mobility and Networking, University of Texas at Arlington, Arlington, TX;Center for Research in Wireless Mobility and Networking, University of Texas at Arlington, Arlington, TX;Center for Research in Wireless Mobility and Networking, University of Texas at Arlington, Arlington, TX
Venue:
ITC20'07 Proceedings of the 20th international teletraffic conference on Managing traffic performance in converged networks
Year:
2007

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Abstract

In this paper we aim to develop an analytical model of the cross-layer characteristics of a Near End Cross Talk (NEXT) limited ADSL channel and determine the effective channel capacity of such a system. The ADSL users often encounter impact of other users in the same cable system due to NEXT interference that reduces the transmission capacity of the ADSL link. At the same time, due to application behavior, the source traffic of the user introduces a level of uncertainty. This paper proposes a model for capturing the cross-layer dynamics of these two uncertainties of an ADSL system. The model provides a closed form analytical method for determining the effective capacity of the ADSL system limited by NEXT interference.