Abstract
Ensuring cooperative awareness by periodic message beaconing in vehicular environments is necessary to address pedestrian safety. However, high periodic basic safety message broadcasting in dense vehicular environments makes accessing the communication channel very competitive. Furthermore, high-frequency periodic broadcasting causes fast device energy dissipation which is a key issue for small computing devices used in wireless sensor and mobile communications. Therefore, in order to achieve reliable message dissemination for vehicle-to-pedestrian safety, energy loss minimization mechanisms for pedestrian mobile devices should be developed. This article proposes controlling the number of broadcasts by eliminating periodic safety message broadcasts from pedestrian nodes; these nodes only receive broadcasts from vehicles and then conditionally communicate with the vehicles when safety alerts are raised. When the pedestrian nodes do not receive messages from any vehicle for a specified period, pedestrian no...
Highlights
The intelligent transport system (ITS) revolution has given birth to tremendous technologies in the realm of vehicle-to-vehicle (V2V) and vehicle-to-infrastructure (V2I) communications
It is important to note that dedicated short range communications (DSRC) for safety is based on the real-time exchange of basic safety messages (BSMs) between pedestrian devices, vehicles, and relevant roadside infrastructures
The major challenge addressed in this study is the fast energy dissipation caused by periodic beaconing of safety messages leading to a short life span in pedestrian devices
Summary
The intelligent transport system (ITS) revolution has given birth to tremendous technologies in the realm of vehicle-to-vehicle (V2V) and vehicle-to-infrastructure (V2I) communications. A broadcast storm suppression approach that eliminates pedestrian node periodic broadcasts is presented; the pedestrian nodes receive vehicle broadcasts and conditionally communicate by unicasting to the specific transmitting vehicle when received BSMs are considered a threat to safety. Certain conditions such as signal interference by high vehicles may affect the transmission and delivery of messages to the pedestrian. A numerical analysis of energy consumption based on packet size considering the SAE J27353 BSM specification in both the conventional IEEE 802.11 broadcast and the proposed vehicle broadcast-to-pedestrian (Vbr2P) scheme.
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