Sharing data between mobile devices, connected vehicles and infrastructure - task 3: concept of operations : technical memorandum –final.

Timcho, Thomas; Toth, Christopher; Rosenbohm, Joerg; Pierce, Bennett K.; Brooks, Richard; Zimmer, Robert; Nallamothu, Sudhakar · 2016 · ROSA P / United States. Department of Transportation. Intelligent Transportation Systems Joint Program Office

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Summary

This technical memorandum, produced by Battelle Memorial Institute for the U.S. Department of Transportation (DOT), addresses the integration of mobile devices into the connected vehicle environment. The research is motivated by the widespread adoption of smartphones and the potential for these devices to transmit safety and mobility messages alongside vehicles and infrastructure. A primary concern is that uncoordinated communication from a large number of mobile devices could cause channel congestion and increased error rates, potentially degrading the low-latency performance required for critical safety applications. The document aims to define a Concept of Operations (ConOps) to examine the feasibility of using non-Dedicated Short-Range Communications (DSRC) mechanisms for probe and safety messages, develop modifications to existing message sets for mobile device applicability, and demonstrate methods for coordinating communications between mobile devices, vehicles, and infrastructure. The methodology involves a conceptual analysis of the current system and the proposed changes, rather than empirical data collection. The authors review existing standards, including SAE J2735 (DSRC Message Set Dictionary), SAE J2945/9 (performance requirements for vulnerable road users), and the National ITS Architecture. The report identifies specific user classes, such as drivers, pedestrians, and infrastructure providers, and defines user needs for Personal Safety Messages (PSM) and Personal Mobility Messages (PMM). The core of the document details several operational scenarios, including small-scale demonstrations involving transit stops and mid-block boarding, as well as large-scale scenarios. These scenarios illustrate how mobile devices equipped with DSRC or cellular technology would interact with roadside equipment and vehicles, incorporating back-office functions for transit management. The findings outline a conceptual system where mobile devices act as a "connected person" fleet, complementing vehicle-centric communications. The report identifies that current standards like the Basic Safety Message (BSM) are vehicle-specific and lack parameters for pedestrians or mobile devices, necessitating the use of the Personal Safety Message (PSM) defined in SAE J2735:2016. The operational scenarios demonstrate how coordinated messaging can improve efficiency and reduce congestion compared to uncoordinated behavior. The document also analyzes the operational, organizational, and developmental impacts of this proposed system, noting advantages in safety and mobility while acknowledging limitations and trade-offs in message coordination and infrastructure requirements. The significance of this work lies in its contribution to the broader connected vehicle strategy by formally integrating mobile devices into the transportation ecosystem. By defining the concept of operations and specific scenarios, the report provides a basis for determining system requirements and demonstration test plans. It highlights the need for harmonized standards and coordinated messaging protocols to prevent network saturation. This document serves as a foundational reference for stakeholders, engineers, and policymakers to understand the role of mobile devices in enhancing safety and mobility, ensuring that the benefits of connected vehicle technology are not compromised by the proliferation of personal communication devices.

Key finding

The report defines a conceptual system and operational scenarios for coordinating mobile device messages with connected vehicles and infrastructure to improve safety and mobility benefits.

Methodology

theoretical

Provenance

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Topics

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• v2x connected vehicle