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Information 2017, 8(3), 86; doi:10.3390/info8030086

Analytical Framework for Preliminary Planning of Very High-Speed Digital Subscriber Line Access Networks

1,†
and
2,†,*
1
Department of Enterprise Engineering “Mario Lucertini”, University of Rome Tor Vergata, Via del Politecnico 1, 00133 Rome, Italy
2
Department of Innovation & Information Engineering, Guglielmo Marconi University, Via Plinio 44, 00193 Rome, Italy
These authors contributed equally to this work.
*
Author to whom correspondence should be addressed.
Received: 25 May 2017 / Revised: 13 July 2017 / Accepted: 13 July 2017 / Published: 19 July 2017
(This article belongs to the Section Information and Communications Technology)
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Abstract

In this paper, we introduce an analytical framework for the performance evaluation of the VDSL2-based access systems. It allows for the obtaining of approximations of the achievable bit rate per user, taking into account several factors, such as the bit-loading limitation per sub-carrier; interference scenario, including the number and positions of the active interferers along the cable; crosstalk statistics; and vectoring. A closed-form expression for the maximum sub-carrier frequency that can be loaded with the maximum number of allowed bits is also presented. Formulas are obtained assuming log-normal statistics for the signal-to-interference-plus-noise ratio (SINR) per sub-carrier. The validity of the proposed formulas has been assessed by computer calculations. A very good agreement between the exact and the approximated bit rates has been obtained. The framework can be used for preliminary design of VDSL2 systems in terms of the bit rate coverage, as well as to analyze performance of other access technologies such as ADSL and G.fast. View Full-Text
Keywords: subscriber loop; crosstalk; VDSL; vectoring subscriber loop; crosstalk; VDSL; vectoring
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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Mazzenga, F.; Giuliano, R. Analytical Framework for Preliminary Planning of Very High-Speed Digital Subscriber Line Access Networks. Information 2017, 8, 86.

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