Wien 2003-12-23 Welcome to the FTW xDSL simulation tool! This is the first official beta version of the upcoming version 3.0 of the FTW xDSL simulation tool. Please look in doc/Simulation_Tool.html for general documentation and WhatsNew for information of what has changed since previous version. This simulation tool aims to support the evolving standardization process of xDSL. The objective of the simulation tool is to concentrate the knowledge of xDSL simulations from standardization work and FSAN results into one simulation package to facilitate evaluation of various xDSL proposals and scenarios. The future development and support for this tool is now done by Telecommunications Research Center Vienna (FTW), Austria, . The performance of ADSL, SDSL, and VDSL as well as its impact on existing services can be evaluated using this tool. A number of predefined scenarios (specific topologies and traffic patterns) are implemented and the noise models used in standardization bodies like ETSI and ITU are directly available in this tool. Besides the predefined scenarios and models it is possible for the user to define their own scenarios, noise models, various noise levels, and spectral masks. The tool have now also the possibility to simulate various forms of line-code dependent things. License: ------- This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; version 2 of the License. When REFERRING to this simulator (The FTW xDSL simulator) no files in the xdslcomm and xdsldefs directories should be changed. When referring to simulations done with this simulator the main simulations files must be made available upon request to anyone asking for them. That is, anyone should be able replicate any simulations referring to this simulator by putting the main files into their simulator and redo the experiments for themselves. Disclaimer: ----------- This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details (in file COPYING, or http://www.opensource.org/gpl-license.html) You should have received a copy of the GNU General Public License along with this program; if not, write to the Free Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA The numerical assumptions in this tool are based on assumptions in published ETSI and ANSI standards, and the few measurements that have been performed. Due to the random and large variations in behavior of these networks, it can not be guaranteed that these assumptions are realistic for real access networks. Contact: -------- In the future FTW will serve as support for the tool and will release bug fixes and function as coordinator for the simulator future developments. A web site for the simulator can be found at: http://www.xdsl.ftw.at/xdslsimu Comments can be sent the authors directly or to: xdslsimu@ftw.at Happy simulation, wishes the main authors: Tomas Nordström Daniel Bengtsson FTW TeliaSonera AB Donau-City-Strasse 1 Aurorum 6 AT-1220 Wien, Austria SE-97775 Luleå, Sweden (Tomas.Nordstrom@FTW.at) (Daniel.Bengtsson@teliasonera.com) -------- Copyright (C): 1998-2000 by Telia Research AB, Luleå, Sweden; 2000-2003 by Forschungszentrum Telekommunikation Wien, Austria; All rights reserved.