Abstract
The objective of vehicular communication is to improve road safety and traffic efficiency through a variety of cooperative intelligent transport system (C-ITS) services. These services allow information exchange between vehicles and other communication entities (e.g., vehicles, infrastructure, pedestrians). Many advanced services are envisaged to support autonomous vehicles and safety applications. The performance requirements of such services are considered highly critical for road safety. However, all these services increase the channel load, and thus, it is difficult to differentiate which service has a higher priority for accessing communication channels. In this paper, we focus on the classification of C-ITS services, which allows the cohabitation of all services considering the strict performance requirements for some services. The aim is to classify C-ITS services based on their packet delay requirements in order to define higher priority for critical services to ensure their dissemination, especially under congestion conditions. Then, we present protocols and quality of service (QoS) mechanisms that can map this classification to the available vehicular networks.
Highlights
C OOperative intelligent transport systems (C-ITSs) have been proposed in recent years to improve vehicular communication systems
quality of service (QoS) mechanisms can allow C-ITSs to ensure the proper functioning of their services while taking into account the limited resources offered by communication technologies
We present a mapping between the proposed C-ITS service classes and the traffic priorities defined by the ITS-G5 and LTE-V2X technologies
Summary
C OOperative intelligent transport systems (C-ITSs) have been proposed in recent years to improve vehicular communication systems These systems are studied to ensure a set of services that increase road safety, optimize traffic management and improve road user experience. Of their performance requirements and criticality levels This endeavour will be challenging in dense vehicular environments considering the expected increase in the penetration rate of C-ITSs in vehicles, which will likely result in an overload of these networks. QoS mechanisms can allow C-ITSs to ensure the proper functioning of their services while taking into account the limited resources offered by communication technologies. To exploit these resources properly, it is necessary to have a clear classification of C-ITS services that will coexist in such a system. Different communication modes and exchanged information or messages for intelligent transport system applications are given
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