Abstract
In vehicular networks, efficient multi-hop message dissemination can be used for various purposes, such a informing the driver about the recent emergency event or propagating the local dynamic map of a predefined region. Dissemination of warning information up to a longer distance can reduce the accidents on the road. It provides a driver additional time to react to the situations adequately and assists in finding a safe route towards the destination. The adopted V2X standards, ETSI TS’s C-ITS and IEEE 1609/IEEE 802.11p, specify only primitive multi-hop message dissemination schemes. IEEE 1609.4 standard disseminates the broadcast messages using the method of flooding, which causes high redundancy, severe congestion, and long delay during multi-hop propagation. To address these problems, we propose an effective broadcast message dissemination method. It introduces a notion of source Lateral Crossing Line (LCL) algorithm, which elects a set of relay vehicles for each hop based on the vehicle locations in a way that reduces the redundant retransmission and congestion, consequently minimizing the delays. Our simulation results demonstrated that the proposed method can achieve about 15% reduction in delays and 2 times the enhancement in propagation distance compared with the previous methods.
Highlights
Development of Intelligent Transportation Systems (ITS) that are equipped with wireless communication device have been actively studied in recent years to improve the road safety and autonomous driving
We introduce the notion of a source Lateral Crossing Line (LCL) L, which is a perpendicular
We studied multi-hop propagation of broadcast messages in a distributed vehicular network
Summary
Development of Intelligent Transportation Systems (ITS) that are equipped with wireless communication device have been actively studied in recent years to improve the road safety and autonomous driving. It is recommended to propagate a warning on information to further distance, so that drivers approaching event area may have longer time to take precautions [4,5]. There are several crash avoidance applications specified in Reference [6], and each of these applications generates a report that must to be propagated to further distance in multi-hop fashion. In Reference [7], authors proposed a method which utilizes wireless communication between nearby vehicles to warn the driver about potential threats. The information of road events, can be propagated further neighbors applying various dissemination techniques [2,8,9]. One of a classic data dissemination techniques is flooding [2,8]
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