Physical Address
304 North Cardinal St.
Dorchester Center, MA 02124
Candidate Improvements to DSRC Message Set Dictionary Using Systems Engineering (SAE J3067-2020)
SAE J3067-2020 is an Information Report that applies systems engineering methods to propose candidate improvements to the Dedicated Short Range Communications (DSRC) Message Set Dictionary defined in SAE J2735. The report includes a comprehensive concept of operations, architectural needs, and detailed features for vehicle-to-vehicle (V2V) and vehicle-to-everything (V2X) safety applications. Stabilized in 2020, the document serves as a reference for the connected vehicle community.
Overview of the Systems Engineering Approach
The report follows a structured systems engineering framework, beginning with a concept of operations that identifies stakeholders, objectives, and the current situation. It defines a reference physical architecture including various device types:
| Device Type | Role |
|---|---|
| On-Board Unit (OBU) | General-purpose vehicle device for V2V communication |
| Roadside Unit (RSU) | Infrastructure device for V2I communication |
| Public Safety On-Board Unit (PSOBU) | OBU for emergency and law enforcement vehicles |
| Transit Vehicle On-Board Unit (TrVOBU) | OBU for buses and transit vehicles |
| Commercial Motor Vehicle On-Board Unit (CVOBU) | OBU for trucks and commercial fleets |
By formalizing device characteristics and operational environments, the systems engineering process ensures that message set improvements align with user needs and interoperability requirements.
Key Candidate Improvements for V2X Safety
The report details numerous user needs for V2V and V2I applications. For V2V, crash prevention safety is paramount, including forward collision prevention, intersection movement assist, pre-crash actions, and lane change warnings. Situational awareness features such as emergency vehicle alerts and vehicle emergency response are also covered. For V2I, the focus is on safety and eco-driving, including data to determine stopline violations and warnings about work zones and roadway hazards.
🛠️ Engineering Design Insight
The message set candidate improvements prioritize crash prevention and situational awareness. By applying systems engineering, the report transforms high-level safety needs into concrete data elements and message structures, facilitating consistent implementation across OBUs, RSUs, and other device types.
⚠️ Stabilization Notice
SAE J3067 was stabilized in 2020 because the technical community is moving toward newer communication technologies such as C-V2X. While these candidate improvements remain a valuable reference for systems engineering best practices, new designs should consider the latest standards.
Frequently Asked Questions
- What is the purpose of SAE J3067-2020?
It provides candidate improvements to the SAE J2735 DSRC Message Set Dictionary using systems engineering methods, including a concept of operations and architectural needs for V2X safety applications. - What device types are defined in the reference architecture?
The architecture includes On-Board Units (OBU), Roadside Units (RSU), Public Safety OBU, Transit Vehicle OBU, and Commercial Motor Vehicle OBU. - How does this report improve V2X safety?
It formalizes user needs for crash prevention and situational awareness, ensuring that message sets support essential V2V applications like forward collision warning and intersection movement assist, as well as V2I functions like work zone warnings. - Why was the document stabilized?
Stabilization indicates that the using community is moving toward newer technologies (e.g., C-V2X). The report is preserved for reference but not actively maintained.
