Abstract
To ensure the driving safety in vehicular network, it is necessary to construct a local dynamic map (LDM) for an extended range. Using the standard vehicular communication protocols, however, vehicles can construct the LDM for only one-hop range. Constructing large-scale LDM is highly challenging because vehicles randomly change their position. This paper proposes a dynamic map propagation (DMP) method, which builds a large aggregated LDM data using a multi-hop communication. To reduce the data overhead, we introduce an efficient clustering method based on a half-circle of the forwarder’s wireless range. The DMP elects one forwarder per cluster, which constructs LDM and forwards it to a neighbor cluster. The inter-cluster interference is minimized by allocating a different transmit window to each cluster. DMP copes with a dynamic environment by frequently re-electing the forwarders and their associated transmission windows. Simulation results reveal that DMP enhances the forwarders’ reception ratio by 20%, while extending LDM dissemination range by 29% over a previous work.
Highlights
A self-organized dynamic vehicular network supports various types of communications [1,2].The communication links between the vehicles can significantly improve the driving safety and traffic control [3]
This dynamic information can be represented as a map which is updated every predefined period to cope with dynamic nature of V2X network
We prove that our clustering method can reduce communication overhead compared with a conventional clustering method
Summary
A self-organized dynamic vehicular network supports various types of communications [1,2].The communication links between the vehicles can significantly improve the driving safety and traffic control [3]. A self-organized dynamic vehicular network supports various types of communications [1,2]. Rely on recent dynamic information exchanged between the vehicles via vehicle-to-vehicle (V2V) or vehicle-to-infrastructure (V2I) networks. This dynamic information can be represented as a map which is updated every predefined period to cope with dynamic nature of V2X network. This map is called as a local dynamic map (LDM) and its standard definition is given in [4]. V2X can be considered as a key technology that enhances a driving safety
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