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GM and partners demonstrate cross-brand V2X application layer interoperability in China

At the 2016 SAE-China Congress & Exhibition from October 26-28 in Shanghai, General Motors teamed up with the China Academy of Information and Communications Technology (CAICT), Tsinghua University, Chang’an Auto, Yanfeng Visteon and Shanghai International Auto City to demonstrate the interoperability of the emerging China connected vehicle (V2X) application layer standard for the first time.

A complete set of communication standards is necessary for underpinning an intelligent transportation system (ITS) using connected vehicles as a key component. GM, Tsinghua University and Chang’an Auto are leading a working group for the development of the V2X application layer and application data-exchange service standard with the support of SAE-China and C-ITS (China ITS Industry Alliance).

The goal of the working group is to standardize V2X message formats agnostic to lower-layer communication technology. The WG is using a message set dictionary similar to SAE J2735 as the basis, taking into account unique traffic characteristics in China.

Source: Huawei. Click to enlarge.

The working group initially completed a definition and demand analysis of the applications, and is now working to define the required message set dictionary and data exchange standards.

The required message set dictionary defines the content, format and coding methods for data exchange at the application layer. The data exchange standards stipulate time, frequency, data requirements and interface definition for data exchange.

Through the demonstration, the working group improved and verified the required message set dictionary and data exchange standards at the V2X application layer. In addition, it generated important reference data to bolster China’s further research on intelligent and connected vehicles (ICVs) and pave the way for their future deployment.

V2X has the potential to mitigate many traffic collisions and improve traffic congestion by sending and receiving basic safety information such as location, speed and direction of travel between vehicles. For this type of cooperative technology to work, it is essential that common standards and a security framework be established.

We are pleased to bring to China the expertise that we have gained from developing and promoting V2X technology in North America and Europe to drive ICV development in China.

—Dr. John Du, director of GM China Science Lab

The demonstration included the following safety applications: Blind Spot/Lane Change Warning, Forward Collision Warning, Intersection Movement Assist and Special Vehicle Avoid Notification.

In a paper published earlier this year (“Global Harmonization Of Connected Vehicle Communication Standards”), the Michigan Department of Transportation and the Center for Automotive Research (CAR) noted that connected vehicle standards in China are lagging behind the rapid market growth driven by global auto manufactures and domestic telecommunication service providers.

China has set aside spectrum (5.795-5.815GHz) for ITS applications - mainly for ETC, traveler information systems, traffic operation, and fleet management.


Account Deleted

V2X will never work globally because of different standards, protocols etc. And it is not just about vehicles they are not at the center of things (nothing is as everything that runs on electricity will be connected in the coming few years). What will work is X2cloud and vise versa. The cloud for an automaker like Tesla is a central datacenter that has a staff of programmers and security experts that can monitor data flows and prevent hacking before it leads to injury or death for all the devices that upload info and receive info from that cloud. They can also economically add new data protocols for getting info back and forth to the constantly evolving devices in this world of internet of things.

Again only Tesla understands this and already has a cloud (data center) that communicates with its vehicles and other sources of info that are relevant for their autopilot. No other car maker has it or even attempt to build it as far as we know. Other automakers think vehicles can talk directly to each other without anything in between (read cloud) that scans for and monitors viruses and hacking. This is madness from a security point of view and only Tesla gets it. The old auto industry is such a joke of incompetence and disrespect for the environment with their never ending support for unsustainable combustion engines and nearly zero understanding of how to make the IoT work. No wonder that Tesla is able to take on this industry by storm.

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