Evaluation of DSM Performance with Mixed DSL Services and Measured Crosstalk Channels

Neiva Fonseca, D. Neves, Ana Gomes, Marcio Conte, Aldebaro Klautau, Evaldo Gonçalves Pelaes

DOI: 10.14209/sbrt.2007.31321

Evento: XXV Simpósio Brasileiro de Telecomunicações (SBrT2007)

Keywords: Digital Subscriber Lines Power Allocation Dynamic Spectrum Management (DSM) FEXT Crosstalk

Abstract

In most works published so far, dynamic spectrum management (DSM) techniques are simulated assuming a single service (e.g. ADSL) and classical copper-pair channel models described in standards for spectrum management. This work presents an evaluation of DSM algorithms based on measured channels and with multiple services. A measurement campaign was performed to completely characterize scenarios by measuring the direct and far-end crosstalk transfer functions. Results for a total of two scenarios of ten twisted pairs (200 measurements), involving both equal and non-equal length cables are presented. The work also presents a thorough investigation of state-ofart DSM algorithms (namely, ISB, ASB, SCALE and IWF) simulated in multiple services (namely, ADSL, ADSL2+ and VDSL2) scenarios.

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