Riassunto analitico
In recent years, the evolution of Advanced Driver Assistance Systems (ADAS) has
progressively shifted towards connected and automated driving. Correspondingly, Vehicleto-
Everything (V2X) communication technology is stirring a great deal of interest from
both telecommunications and automotive industry players, thanks to its potential for
improving road safety and traffic efficiency in future Intelligent Transportation Systems.
For this reason, the Third Generation Partnership Project (3GPP) has recently introduced
support to Cellular-based V2X (C-V2X) in its latest Release 14 LTE-Advanced
(LTE-A) specifications, addressing basic V2X services and laying the foundation for more
advanced use cases that will be enabled by future 5G systems. This thesis illustrates
C-V2X technology as specified by 3GPP and discusses its suitability for the dissemination
of road safety messages. Namely, alternative strategies for road hazard warning delivery
on roadways are examined and evaluated in terms of end-to-end latency and reliability
for both in-coverage and out-of-coverage scenarios. Under cellular coverage, the local network
infrastructure can be leveraged to quickly deliver road alerts to distant vehicles in a
Vehicle-to-Infrastructure fashion (V2I); however, this implies the extensive deployment of
local distribution servers, along the lines of the Multi-access Edge Computing (MEC) paradigm,
which is yet to be implemented; rather, this work puts forth an original forwarding
method exploiting the currently available local infrastructure with minimal architectural
modifications, without requiring the assistance of application servers. For the case where
a connection to the cellular network is not available, this work investigates the feasibility
of safety message delivery through a simple multi-hop Vehicle-to-Vehicle (V2V) approach,
tailored on LTE-A C-V2X. The performance of both strategies has been thoroughly assessed
by numerical simulations. To achieve this goal, the V2V Mode 4 scheme recently
defined by 3GPP has been developed from scratch and integrated within the ns-3 network
simulator, evaluating V2V communication performance in the presence of both periodic
and event-triggered traffic.
In particular, the V2V transmission scheme recently defined by 3GPP has been integrated
into the ns-3 network simulator by modifying the pre-existing LTE model and the
V2V communication performance has been evaluated for both periodic and event-triggered
traffic.
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Abstract
In recent years, the evolution of Advanced Driver Assistance Systems (ADAS) has
progressively shifted towards connected and automated driving. Correspondingly, Vehicleto-
Everything (V2X) communication technology is stirring a great deal of interest from
both telecommunications and automotive industry players, thanks to its potential for
improving road safety and traffic efficiency in future Intelligent Transportation Systems.
For this reason, the Third Generation Partnership Project (3GPP) has recently introduced
support to Cellular-based V2X (C-V2X) in its latest Release 14 LTE-Advanced
(LTE-A) specifications, addressing basic V2X services and laying the foundation for more
advanced use cases that will be enabled by future 5G systems. This thesis illustrates
C-V2X technology as specified by 3GPP and discusses its suitability for the dissemination
of road safety messages. Namely, alternative strategies for road hazard warning delivery
on roadways are examined and evaluated in terms of end-to-end latency and reliability
for both in-coverage and out-of-coverage scenarios. Under cellular coverage, the local network
infrastructure can be leveraged to quickly deliver road alerts to distant vehicles in a
Vehicle-to-Infrastructure fashion (V2I); however, this implies the extensive deployment of
local distribution servers, along the lines of the Multi-access Edge Computing (MEC) paradigm,
which is yet to be implemented; rather, this work puts forth an original forwarding
method exploiting the currently available local infrastructure with minimal architectural
modifications, without requiring the assistance of application servers. For the case where
a connection to the cellular network is not available, this work investigates the feasibility
of safety message delivery through a simple multi-hop Vehicle-to-Vehicle (V2V) approach,
tailored on LTE-A C-V2X. The performance of both strategies has been thoroughly assessed
by numerical simulations. To achieve this goal, the V2V Mode 4 scheme recently
defined by 3GPP has been developed from scratch and integrated within the ns-3 network
simulator, evaluating V2V communication performance in the presence of both periodic
and event-triggered traffic.
In particular, the V2V transmission scheme recently defined by 3GPP has been integrated
into the ns-3 network simulator by modifying the pre-existing LTE model and the
V2V communication performance has been evaluated for both periodic and event-triggered
traffic.
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