Standards Development

Scope

The scope of this proposal is specifications for application or software of server function implemented within a vehicle, including definitions from OSI layers descriptions to message sequences in order to gather information about security and function of the driving from other neighbouring vehicles or traffic participants by communication or other means without receiving support of the infrastructure services. This document, second part of ISO 23239 covers specifications of communication stack from OSI Layer 5 to 7, information expressions and message sequences.

This group standard documents will be composed of following group documents. They will be submitted as separated new work items continuously.

Road vehicles – Vehicle domain service – Part 1: General information and use case definitions

Road vehicles – Vehicle domain service – Part 2: Application layer and sequence requirements

Road vehicles – Vehicle domain service – Part 3: Network and transport layer requirements

Road vehicles – Vehicle domain service – Part 4: Physical and data link layer requirements 

Additional relevant documents for conformance tests will follow

Purpose

Although the autonomous driving function takes over the driver’s operation, it still requires a judgment of correct driving behavior. While many independent autonomous driving cars and intelligent driver assistance functions can provide information collected by various sensors, LIDAR and radar, their performance is limited and it is inevitable that they may not be as accurate as necessary due to weather, blind spots and other ambient conditions. Therefore, independent sensor functions may not be sufficient to provide accurate situational awareness.

In addition, the blinkers normally equipped with all vehicles can only provide one-way fragmentary information, if the vehicle communicates with neighboring other vehicles or traffic participants and exchanges the necessary information, it can go beyond the limits of its sensor capabilities and blind spots to provide a more accurate assessment of the traffic situation. If each vehicle can communicate with other vehicles, it will be possible to negotiate a planned driving operation with neighboring vehicles and adjust the order and timing of their driving operation.

This ability to share information between vehicles is provided only on a direct communication network between the vehicle and the neighboring traffic participants, and can be accomplished with on-board functionality without investing in a significant communication infrastructure on the roadside. It will enable vehicles on the road to make more accurate and appropriate driving choices, which will have a number of benefits such as reducing traffic accidents, reducing congestion and improving traffic efficiency.

Implementation specifications need to be planned to ensure that the number of vehicles on the road can communicate instantly with each other, establish safe connections and adjust driving plans in a reliable and stable manner. Therefore, there are a number of issues and challenges that need to be solved in the communication specification, such as collecting sufficient information, cross-validating and generating reliable integrated information, sending the created information to the necessary recipients, and talking to multiple vehicles in a secure session. It is therefore important to compile the traffic conditions that need to be addressed and identify selected use cases, and based on these it is necessary to identify the specifications and technology requirements for vehicle applications beyond V2X communication.

A key aspect of this documentation development focuses on the points of implementation across the vehicle. Typical use cases are collected and the required aspects of the implementation specification are derived in this document and following series parts with referring to the existing documents. All  documentation is developed within a unique series of standards to eliminate inconsistencies and unnecessary redundancies within the documentation. As a result of these tasks, compatibility and interoperability will be confirmed, adding to the economy and efficiency of implementation with global consistency. In addition, by providing a concrete pathway from existing documentation to vehicle implementation, it is expected to support a smooth launch and accelerate the introduction of current or next generation communication technologies into the future vehicle market.

Proposed works items about specifications for communication will define detailed requirements based on more general policies for VDS implementation provided in ISO 232391-1 document. They will provide practical specifications to generate trustable driving information applicable to driving operations in a vehicle performed under the driving responsibilities