Proceedings ArticleDOI
Investigating the effectiveness of decentralized congestion control in vehicular networks
Andrea Vesco,Riccardo Scopigno,Claudio Casetti,Carla-Fabiana Chiasserini +3 more
- pp 1314-1319
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TLDR
Surprisingly, it is found that DCC has little impact, and, in certain scenarios, it may even lead to performance degradation with respect to the case where the legacy IEEE 802.11p MAC protocol is implemented.Abstract:
Vehicular ad hoc networks are expected to suffer from channel congestion, due to the high number of vehicles moving on the roads, the limited available bandwidth and the many applications that they will support. In order to mitigate such problem, ETSI has recently specified the Decentralized Congestion Control (DCC) mechanisms for Intelligent Transportation Systems (ITS) operating in the 5 GHz range. Although they are already part of the standard, very few results exist on the DCC performance. In this work, we aim at filling this gap by investigating the impact on the system performance of the single DCC mechanisms, as well as their joint effect when they are all implemented at the DCC access layer. Surprisingly, we find that DCC has little impact, and, in certain scenarios, it may even lead to performance degradation with respect to the case where the legacy IEEE 802.11p MAC protocol is implemented.read more
Citations
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Proceedings ArticleDOI
Collective perception and decentralized congestion control in vehicular ad-hoc networks
TL;DR: Different message formats and dissemination variants for sharing sensor data are presented and analysed and implications caused by Decentralized Congestion Control as proposed by standardisation are assessed in a constrained environment with hundreds of vehicles.
Proceedings ArticleDOI
A First Investigation of Congestion Control for LTE-V2X Mode 4
TL;DR: This work focuses on the interactions between the strategies used by the LTE-V2X Sidelink mode 4 for autonomous resource allocations - LBT and Semi-persistent scheduling (SPS) - and decentralized congestion control (DCC) mechanisms.
Proceedings ArticleDOI
Making cars a main ICT resource in smart cities
Onur Altintas,Falko Dressler,Florian Hagenauer,Makiko Matsumoto,Miguel Sepulcre,Christoph Sommery +5 more
TL;DR: An architecture is proposed, named Car4ICT, that puts cars into the middle of future ICT systems, in this system users are able to offer and request services; at the same time, members are in charge of discovering the services and routing the data between users.
Journal ArticleDOI
Dependability of Decentralized Congestion Control for Varying VANET Density
TL;DR: A novel performance indicator is defined, evaluated, and discussed, which the authors of this work have named data novelty, and a multistate-active DCC mechanism is proposed, which achieves a dependable behavior.
Journal ArticleDOI
The Effect of Decentralized Congestion Control on Collective Perception in Dense Traffic Scenarios
TL;DR: This work presents and analyse different message formats and dissemination variants for sharing sensor data and the implications of an ETSI ITS G5 based network for collective perception and assesses the results in a controlled environment.
References
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Proceedings ArticleDOI
Congestion control for vehicular safety: synchronous and asynchronous MAC algorithms
TL;DR: A standard compliant TDM overlay on top of the MAC layer that can significantly improve the packet reception performance and combined with a distributed resource selection protocol can discover even more neighboring devices than the improved asynchronous approach, making DSRC safety applications more reliable.
Proceedings ArticleDOI
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TL;DR: This paper proposes to leverage recurring interferences by randomly selecting each TX power following a given probability distribution, and the probability distribution provides control to the applications regarding the required Awareness Quality, in particular by providing a higher Awareness Quality at close range.
Proceedings ArticleDOI
Urban VANETs and hidden terminals: Evaluation through a realistic urban grid propagation model
TL;DR: A new urban model (called Reliable Urban Grid - RUG) is proposed as an extension of an already validated propagation model of urban corners to more complex grid topologies, showing the higher impact of collisions by hidden terminals on standard contention-based medium access control protocols when compared to slotted solutions.
Comparing Communication Performance of DSRC OBEs from Multiple Suppliers
TL;DR: The results of extensive tests that compare four on-board equipment (OBE) devices sending safety messages show that some devices consistently perform moderately better than others, and some configurations appear well suited for supporting collision avoidance safety applications, while others do not.