Data-Rate Performance and Coverage of the Sub-Band Vectoring for VDSL 35b Profile

ABSTRACT

Vectoring, used in VDSL2 to counteract FEXT, becomes less effective, or even ineffective, when users belong to different vectoring groups. This situation is common when the Regulator imposes sub-loop unbundling and users of uncoordinated service providers cause alien-FEXT. The sub-band vectoring (SBV) technique introduced here, avoids this situation and retains the vectoring benefits. We show SBV allows achieving up to 150 Mbit/s per user in downstream at 200 m from cabinet for VDSL2 profile-35b, with two concurrent service providers. We also introduce the concept of data-rate coverage representing the users’ percentage served at a given data-rate in the area.

KEYWORDS:

• Vectoring
• VDSL2
• sub-band vectoring
• sub-loop unbundling
• alien-FEXT
• data-rate coverage

Notes

¹ Computer calculations done with higher values of overall power showed that data-rate performance does not improve significantly beyond this value.

Additional information

Notes on contributors

Romeo Giuliano

Romeo Giuliano received the telecommunication engineering degree cum laude in 1999 (with awarded thesis as the best one of the year), the master in business engineering in 2001 and the telecommunications and microelectronic engineering PhD degree in 2004 from University of Rome “Tor Vergata”, Rome, Italy. From 2014, he is an associate professor at Guglielmo Marconi University, “Department of Innovation & Information Engineering”, in Networks and the Internet and Wireless Systems for the Internet Access courses. From 2011 to 2014, he was researcher at University of Rome Tor Vergata “Department of Enterprise Engineering”. From 2001 to 2011, he joined the Consorzio Università Industria, Laboratori di Radiocomunicazioni (RadioLabs, http://www.radiolabs.it), a research consortium specialized in wireless communications. Currently he is working on 4G wireless cellular systems, 5G and wired access networks (e.g. VDSL2 and G.fast). Other development projects and research interests are on unmanned aerial vehicles, remote train control systems, indoor and outdoor localization applications based on GNSS systems and RFID technology, heterogeneous networks and dense networks, wireless sensor and actuator networks, UWB technology, and the Internet of Things/Machine Type Communications. He is author or co-author of about 100 papers in international journals and conferences.

Franco Mazzenga

Franco Mazzenga received the DrEng degree in electronics engineering cum laude from the University of Rome “Tor Vergata”, Italy in 1993. His thesis was awarded the prize for the 40-th year of the Fondazione Ugo Bordoni (FUB), Rome, Italy. In 1997 he obtained the PhD degree in telecommunications. From 1998 to 2000 he was researcher in Consorzio di Ricerca in Telecomunicazioni (CoRiTel), Rome, Italy. From 2000 to 2006 he was researcher in the Electronics Engineering Department of the University of Rome “Tor Vergata”. From 2006, he is an associate professor of communications in the Department of Enterprise Engineering at the same university. Since 2001, he is the CTO of the Consorzio Università-Industria Laboratori di Radiocomunicazioni (RadioLabs), Rome, Italy (http://www.radiolabs.it), and he is a member of the Board of Directors since 2012. He is the author of about 140 scientific papers published in international journals and conference proceedings. He owns five patents in communications technologies. His research interests are in wireless and wired communications technologies and access networks. He has been involved in several European FP5, FP6 and FP7 projects and industrial projects for three Finmeccanica companies: Selex Communications (now Selex-ES), Telespazio and Ansaldo STS.

Francesco Vatalaro

Francesco Vatalaro is a full professor of telecommunications at the University of Roma Tor Vergata, Rome, Italy. He received the DrEng degree in electronics engineering from the University of Bologna, Italy, in March 1977. Before joining University in 1987, he worked for industrial laboratories. As visiting professor he taught courses at the Electrical Engineering/Systems Department, University of Southern California (USC), Los Angeles, CA (1998) and at the Computer Science Department of UCLA, Los Angeles, CA (2000). He was founder (2001) and the president of the research center RadioLabs, Rome, Italy (2001-2008). He is/was member of scientific committees and member of the board of directors in several private/public research institutions. He was the president of the NGN Committee of the Italian Telecoms Regulator Agcom (2009-2012). He was member of the Scientific Committee of Thales Alenia Space, France-Italy (2006-2010). He was the IEEE Italy Section Chair (2010-2012), and a member of the IEEE ComSoc Strategic Committee in 2012. He co-authored over 150 research papers published in international journals and in conference proceedings, and three patents. His scientific interests include next generation networks, regulatory issues in telecommunications, mobile communications, and spectrum access policies. Professor Vatalaro is a senior member of the IEEE.