Efficient coordination and transmission of data for cooperative vehicular safety applications

Abstract

This paper presents a method for efficient exchanges of Data Elements between vehicles running multiple safety applications. To date, significant efforts have been made in designing lower-layer communication protocols for VANET. Also, industry and government agencies have made progress in identifying and implementing certain vehicular safety applications. However, the specific environment of VANETenabled safety applications lends itself to significant efficiencies in how information is coordinated within a vehicle and transmitted to neighboring vehicles. These efficiencies are instantiated in what we call the Message Dispatcher. The Message Dispatcher is an interface between multiple safety applications and the lower-layer communication stack. This Message Dispatcher concept was recently contributed to the Society of Automotive Engineers (SAE) and has become an underlying principle in their safety message standardization process. It has also been implemented in vehicle demonstrations at the Toyota Technical Center (TTC) in Ann Arbor, MI.

Performance Analysis of WAVE Control Channels for Public Safety Services in VANETs

“…C.L. Robinson [7] analyzed the Data Elements usage in the eight NHTSA-defined high priority safety applications. We calculate the total encoded data size of each application and each communication type.…”

Human centric data fusion in Vehicular Cyber-Physical Systems

“…with attributes such as speed, acceleration, etc that are exchanged over the wireless channel. The authors in [3] proposed a component called the Message Dispatcher that acted as a multiplexer at each sender, by removing redundant data elements from applicationThe First International Workshop on Cyber-Physical Networking Systems 978-1-4244-9920-5/11/$26.00 ©2011 IEEEgenerated messages before sending them on the wireless channel. It demultiplexed and regenerated the messages at the receiver before delivering them to the applications.…”

“…This is crucial from the safety application perspective since most vehicles are constantly in motion, and the range of the on-board radio is only a few hundred feet, thereby giving us a very small time-window We have presently used the Message Dispatcher [3] to handle this task. The LL Fusion layer also performs two additional functions: it checks incoming data for correctness and maintains a historical information repository called the environment.…”

Multimodal PDA Interfaces to Assist Drivers in Monitoring Their Vehicles

“…TrafficView [3] focuses on safety and describes a PDA-based structure for inter-vehicle communication of local data between neighbouring cars (GPS coordinates and OBD gathered values). Another framework for collision avoidance is proposed in [4] where the hardware components (including a mini-PC) are integrated into the car and linked to the dashboard display. In [5] a querying model for collecting and sharing information about vehicles and roads status is described.…”

“…: speed, engine load/temperature) and vehicle terrestrial coordinates is basic to develop services based on vehicle-to-vehicle (v2v) and vehicle-to-infrastructure (v2i) data exchange [4]. We considered the locationawareness as a complementary aspect for the car status monitoring.…”