Abstract:
To improve safety on the roads, next-generation vehicles will be equipped with short-range communication technologies. Many applications enabled by such communication wil...Show MoreMetadata
Abstract:
To improve safety on the roads, next-generation vehicles will be equipped with short-range communication technologies. Many applications enabled by such communication will be based on a continuous broadcast of information about the own status from each vehicle to the neighborhood, often referred as cooperative awareness or beaconing. Although the only standardized technology allowing direct vehicle-to-vehicle (V2V) communication has been IEEE 802.11p until now, the latest release of longterm evolution (LTE) included advanced device-to-device features designed for the vehicular environment (LTE-V2V) making it a suitable alternative to IEEE 802.11p. Advantages and drawbacks are being considered for both technologies, and which one will be implemented is still under debate. The aim of this paper is thus to provide an insight into the performance of both technologies for cooperative awareness and to compare them. The investigation is performed analytically through the implementation of novel models for both IEEE 802.11p and LTE-V2V able to address the same scenario, with consistent settings and focusing on the same output metrics. The proposed models take into account several aspects that are often neglected by related works, such as hidden terminals and capture effect in IEEE 802.11p, the impact of imperfect knowledge of vehicles position on the resource allocation in LTE-V2V, and the various modulation and coding scheme combinations that are available in both technologies. Results show that LTE-V2V allows us to maintain the required quality of service at even double or more the distance than IEEE 802.11p in moderate traffic conditions. However, due to the half-duplex nature of devices and the structure of LTE frames, it shows lower capacity than IEEE 802.11p if short distances and very high vehicle density are targeted.
Published in: IEEE Transactions on Vehicular Technology ( Volume: 66, Issue: 11, November 2017)

Institute of Electronics, Computer and Telecommunication Engineering, National Research Council of Italy, Bologna, Italy
Alessandro Bazzi (S’03–M’06) received the Laurea
degree and the Ph.D. degree in telecommunications engineering both from the University of Bologna, Bologna, Italy, in
2002 and 2006, respectively. Since 2002, he has been with the Institute of Electronics, Computer and Telecommunication
Engineering, National Research Council of Italy and since the academic year 2006/2007, he has been an adjunct
Professor at the Universi...Show More
Alessandro Bazzi (S’03–M’06) received the Laurea
degree and the Ph.D. degree in telecommunications engineering both from the University of Bologna, Bologna, Italy, in
2002 and 2006, respectively. Since 2002, he has been with the Institute of Electronics, Computer and Telecommunication
Engineering, National Research Council of Italy and since the academic year 2006/2007, he has been an adjunct
Professor at the Universi...View more

Institute of Electronics, Computer and Telecommunication Engineering, National Research Council of Italy, Bologna, Italy
Barbara M. Masini (S’02–M’05) received the Laurea
degree (summa cum laude) in telecommunications engineering and the Ph.D. degree in electronic,
computer science, and telecommunication engineering from the University of Bologna, Bologna, Italy, in 2001 and 2005,
respectively. Since 2005, she has been a Researcher at the Institute for Electronics and for Information and
Telecommunications Engineering, National Research...Show More
Barbara M. Masini (S’02–M’05) received the Laurea
degree (summa cum laude) in telecommunications engineering and the Ph.D. degree in electronic,
computer science, and telecommunication engineering from the University of Bologna, Bologna, Italy, in 2001 and 2005,
respectively. Since 2005, she has been a Researcher at the Institute for Electronics and for Information and
Telecommunications Engineering, National Research...View more

Institute of Electronics, Computer and Telecommunication Engineering, National Research Council of Italy, Bologna, Italy
Alberto Zanella (S’99–M’00–SM’12)
received the Laurea degree (summa cum laude) in elecronic engineering from the University of Ferrara,
Ferrara, Italy, in 1996, and the Ph.D. degree in electronic engineering and computer science from the University of
Bologna, Bologna, Italy, in 2000. In 2001, he joined the CNR-CSITE (merged in CNR-IEIIT since 2002) as a Researcher
and, since 2006, has been a Senior Researcher. His re...Show More
Alberto Zanella (S’99–M’00–SM’12)
received the Laurea degree (summa cum laude) in elecronic engineering from the University of Ferrara,
Ferrara, Italy, in 1996, and the Ph.D. degree in electronic engineering and computer science from the University of
Bologna, Bologna, Italy, in 2000. In 2001, he joined the CNR-CSITE (merged in CNR-IEIIT since 2002) as a Researcher
and, since 2006, has been a Senior Researcher. His re...View more

Vodafone Group Research and Development, London, U.K.
Ilaria Thibault received the B.S. and M.Sc. degrees in
telecommunications engineering from the University of Bologna, Bologna, Italy, in 2006 and 2009, respectively, and the
Ph.D. degree in information and communication technologies jointly from the University of Bologna, Italy, and from
Pompeu Fabra University, Barcelona, Spain, in 2013. She is currently working as a Principal Researcher in Vodafone
Group R&D and foc...Show More
Ilaria Thibault received the B.S. and M.Sc. degrees in
telecommunications engineering from the University of Bologna, Bologna, Italy, in 2006 and 2009, respectively, and the
Ph.D. degree in information and communication technologies jointly from the University of Bologna, Italy, and from
Pompeu Fabra University, Barcelona, Spain, in 2013. She is currently working as a Principal Researcher in Vodafone
Group R&D and foc...View more

Institute of Electronics, Computer and Telecommunication Engineering, National Research Council of Italy, Bologna, Italy
Alessandro Bazzi (S’03–M’06) received the Laurea
degree and the Ph.D. degree in telecommunications engineering both from the University of Bologna, Bologna, Italy, in
2002 and 2006, respectively. Since 2002, he has been with the Institute of Electronics, Computer and Telecommunication
Engineering, National Research Council of Italy and since the academic year 2006/2007, he has been an adjunct
Professor at the University of Bologna. His work mainly focuses on connected vehicles and heterogeneous wireless
access networks, with particular emphasis on medium access control, routing, and radio resource management. He serves
as a Reviewer and TPC Member for various international journals and conferences and he is currently in the Editorial
Board of Hindawi's Mobile Information Systems.
Alessandro Bazzi (S’03–M’06) received the Laurea
degree and the Ph.D. degree in telecommunications engineering both from the University of Bologna, Bologna, Italy, in
2002 and 2006, respectively. Since 2002, he has been with the Institute of Electronics, Computer and Telecommunication
Engineering, National Research Council of Italy and since the academic year 2006/2007, he has been an adjunct
Professor at the University of Bologna. His work mainly focuses on connected vehicles and heterogeneous wireless
access networks, with particular emphasis on medium access control, routing, and radio resource management. He serves
as a Reviewer and TPC Member for various international journals and conferences and he is currently in the Editorial
Board of Hindawi's Mobile Information Systems.View more

Institute of Electronics, Computer and Telecommunication Engineering, National Research Council of Italy, Bologna, Italy
Barbara M. Masini (S’02–M’05) received the Laurea
degree (summa cum laude) in telecommunications engineering and the Ph.D. degree in electronic,
computer science, and telecommunication engineering from the University of Bologna, Bologna, Italy, in 2001 and 2005,
respectively. Since 2005, she has been a Researcher at the Institute for Electronics and for Information and
Telecommunications Engineering, National Research Council of Italy. Since 2006, she has also been an adjunct Professor
at the University of Bologna. She works in the area of wireless communication systems and her research interests are
mainly focused on vehicular networks, facing several issues, from physical and MAC aspects up to adaptive beaconing
and real-field trial implementations. Special attention has been paid to vehicular sensor networks for urban sensing
and cellular network offloading. Her research is also focused on physical layer aspects for relay-assisted
communications, energy harvesting, and on theoretical and experimental activities dealing with visible light
communication. Since 2016, she has been an Area Editor of Elsevier Computer Communication and has
been the Lead Guest Editor of Elsevier Ad Hoc Networks, special issue on vehicular networks for
mobile crowd sensing. She acts as a Reviewer for several journals and as a TPC member for several conferences and for
the Italian Ministry of Economic Development.
Barbara M. Masini (S’02–M’05) received the Laurea
degree (summa cum laude) in telecommunications engineering and the Ph.D. degree in electronic,
computer science, and telecommunication engineering from the University of Bologna, Bologna, Italy, in 2001 and 2005,
respectively. Since 2005, she has been a Researcher at the Institute for Electronics and for Information and
Telecommunications Engineering, National Research Council of Italy. Since 2006, she has also been an adjunct Professor
at the University of Bologna. She works in the area of wireless communication systems and her research interests are
mainly focused on vehicular networks, facing several issues, from physical and MAC aspects up to adaptive beaconing
and real-field trial implementations. Special attention has been paid to vehicular sensor networks for urban sensing
and cellular network offloading. Her research is also focused on physical layer aspects for relay-assisted
communications, energy harvesting, and on theoretical and experimental activities dealing with visible light
communication. Since 2016, she has been an Area Editor of Elsevier Computer Communication and has
been the Lead Guest Editor of Elsevier Ad Hoc Networks, special issue on vehicular networks for
mobile crowd sensing. She acts as a Reviewer for several journals and as a TPC member for several conferences and for
the Italian Ministry of Economic Development.View more

Institute of Electronics, Computer and Telecommunication Engineering, National Research Council of Italy, Bologna, Italy
Alberto Zanella (S’99–M’00–SM’12)
received the Laurea degree (summa cum laude) in elecronic engineering from the University of Ferrara,
Ferrara, Italy, in 1996, and the Ph.D. degree in electronic engineering and computer science from the University of
Bologna, Bologna, Italy, in 2000. In 2001, he joined the CNR-CSITE (merged in CNR-IEIIT since 2002) as a Researcher
and, since 2006, has been a Senior Researcher. His research interests include MIMO, mobile radio systems, ad hoc and
sensor networks, and vehicular networks. Since 2001, he has the appointment of Adjunt Professor of electrical
communication (2001–2005), telecommunication systems (2002-, 2012–2013), multimedia communication systems
(2006–2011) at the University of Bologna. He participated/participate in several national and European projects.
He was Technical Cochair of the PHY track of the IEEE Conference WCNC 2009 and of the Wireless Communications
Symposium of the IEEE GLOBECOM 2009. He was/is in the Technical Program Committee of several international
conferences, such as ICC, GLOBECOM, WCNC, PIMRC, and VTC. He had served as the Editor for Wireless Systems
(2003–2012) and the IEEE Transactions on Communications. He is currently the Senior Editor of
the IEEE Transactions on Communications.
Alberto Zanella (S’99–M’00–SM’12)
received the Laurea degree (summa cum laude) in elecronic engineering from the University of Ferrara,
Ferrara, Italy, in 1996, and the Ph.D. degree in electronic engineering and computer science from the University of
Bologna, Bologna, Italy, in 2000. In 2001, he joined the CNR-CSITE (merged in CNR-IEIIT since 2002) as a Researcher
and, since 2006, has been a Senior Researcher. His research interests include MIMO, mobile radio systems, ad hoc and
sensor networks, and vehicular networks. Since 2001, he has the appointment of Adjunt Professor of electrical
communication (2001–2005), telecommunication systems (2002-, 2012–2013), multimedia communication systems
(2006–2011) at the University of Bologna. He participated/participate in several national and European projects.
He was Technical Cochair of the PHY track of the IEEE Conference WCNC 2009 and of the Wireless Communications
Symposium of the IEEE GLOBECOM 2009. He was/is in the Technical Program Committee of several international
conferences, such as ICC, GLOBECOM, WCNC, PIMRC, and VTC. He had served as the Editor for Wireless Systems
(2003–2012) and the IEEE Transactions on Communications. He is currently the Senior Editor of
the IEEE Transactions on Communications.View more

Vodafone Group Research and Development, London, U.K.
Ilaria Thibault received the B.S. and M.Sc. degrees in
telecommunications engineering from the University of Bologna, Bologna, Italy, in 2006 and 2009, respectively, and the
Ph.D. degree in information and communication technologies jointly from the University of Bologna, Italy, and from
Pompeu Fabra University, Barcelona, Spain, in 2013. She is currently working as a Principal Researcher in Vodafone
Group R&D and focusing on the development and prototyping of 5G technologies and connected car solutions. Her main
research interests include network deployment models for ultrareliable and low latency services and physical layer
aspects of wireless vehicle-to-vehicle communications.
Ilaria Thibault received the B.S. and M.Sc. degrees in
telecommunications engineering from the University of Bologna, Bologna, Italy, in 2006 and 2009, respectively, and the
Ph.D. degree in information and communication technologies jointly from the University of Bologna, Italy, and from
Pompeu Fabra University, Barcelona, Spain, in 2013. She is currently working as a Principal Researcher in Vodafone
Group R&D and focusing on the development and prototyping of 5G technologies and connected car solutions. Her main
research interests include network deployment models for ultrareliable and low latency services and physical layer
aspects of wireless vehicle-to-vehicle communications.View more