622 research outputs found
Simulation Framework for Cooperative Adaptive Cruise Control with Empirical DSRC Module
Wireless communication plays a vital role in the promising performance of
connected and automated vehicle (CAV) technology. This paper proposes a
Vissim-based microscopic traffic simulation framework with an analytical
dedicated short-range communication (DSRC) module for packet reception. Being
derived from ns-2, a packet-level network simulator, the DSRC probability
module takes into account the imperfect wireless communication that occurs in
real-world deployment. Four managed lane deployment strategies are evaluated
using the proposed framework. While the average packet reception rate is above
93\% among all tested scenarios, the results reveal that the reliability of the
vehicle-to-vehicle (V2V) communication can be influenced by the deployment
strategies. Additionally, the proposed framework exhibits desirable scalability
for traffic simulation and it is able to evaluate transportation-network-level
deployment strategies in the near future for CAV technologies.Comment: 6 pages, 6 figure, 44th Annual Conference of the IEEE Industrial
Electronics Societ
Reducing Message Collisions in Sensing-based Semi-Persistent Scheduling (SPS) by Using Reselection Lookaheads in Cellular V2X
In the C-V2X sidelink Mode 4 communication, the sensing-based semi-persistent
scheduling (SPS) implements a message collision avoidance algorithm to cope
with the undesirable effects of wireless channel congestion. Still, the current
standard mechanism produces high number of packet collisions, which may hinder
the high-reliability communications required in future C-V2X applications such
as autonomous driving. In this paper, we show that by drastically reducing the
uncertainties in the choice of the resource to use for SPS, we can
significantly reduce the message collisions in the C-V2X sidelink Mode 4.
Specifically, we propose the use of the "lookahead," which contains the next
starting resource location in the time-frequency plane. By exchanging the
lookahead information piggybacked on the periodic safety message, vehicular
user equipments (UEs) can eliminate most message collisions arising from the
ignorance of other UEs' internal decisions. Although the proposed scheme would
require the inclusion of the lookahead in the control part of the packet, the
benefit may outweigh the bandwidth cost, considering the stringent reliability
requirement in future C-V2X applications.Comment: Submitted to MDPI Sensor
Development and Performance Evaluation of a Connected Vehicle Application Development Platform (CVDeP)
Connected vehicle (CV) application developers need a development platform to build,
test and debug real-world CV applications, such as safety, mobility, and environmental
applications, in edge-centric cyber-physical systems. Our study objective is to develop
and evaluate a scalable and secure CV application development platform (CVDeP)
that enables application developers to build, test and debug CV applications in realtime.
CVDeP ensures that the functional requirements of the CV applications meet the
corresponding requirements imposed by the specific applications. We evaluated the
efficacy of CVDeP using two CV applications (one safety and one mobility application)
and validated them through a field experiment at the Clemson University Connected
Vehicle Testbed (CU-CVT). Analyses prove the efficacy of CVDeP, which satisfies the
functional requirements (i.e., latency and throughput) of a CV application while
maintaining scalability and security of the platform and applications
Proposition of Augmenting V2X Roadside Unit to Enhance Cooperative Awareness of Heterogeneously Connected Road Users
Intelligent transportation and autonomous mobility solutions rely on
cooperative awareness developed by exchanging proximity and mobility data among
road users. To maintain pervasive awareness on roads, all vehicles and
vulnerable road users must be identified, either cooperatively, where road
users equipped with wireless capabilities of Vehicle-to-Everything (V2X) radios
can communicate with one another, or passively, where users without V2X
capabilities are detected by means other than V2X communications. This
necessitates the establishment of a communications channel among all
V2X-enabled road users, regardless of whether their underlying V2X technology
is compatible or not. At the same time, for cooperative awareness to realize
its full potential, non-V2X-enabled road users must also be communicated with
where possible or, leastwise, be identified passively. However, the question is
whether current V2X technologies can provide such a welcoming heterogeneous
road environment for all parties, including varying V2X-enabled and
non-V2X-enabled road users? This paper investigates the roles of a
propositional concept named Augmenting V2X Roadside Unit (A-RSU) in enabling
heterogeneous vehicular networks to support and benefit from pervasive
cooperative awareness. To this end, this paper explores the efficacy of A-RSU
in establishing pervasive cooperative awareness and investigates the
capabilities of the available communication networks using secondary data. The
primary findings suggest that A-RSU is a viable solution for accommodating all
types of road users regardless of their V2X capabilities.Comment: 13 page
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