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Vehicle-to-vehicle comms at core of car smart technology

07 Apr 2016

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Self-driving technologies in automated trucks is possible, as evidenced by a recent successful demonstration by NXP Semiconductors N.W. and DAF trucks in the Netherlands. The demonstration was part of the European Truck Platooning Challenge, an event organised by the Dutch Ministry of Infrastructure and the Environment, that has trucks driving in columns (platooning) on public roads from several European cities to the Netherlands.

The challenge is designed to bring autonomous platooning one step closer to implementation by showcasing economic, traffic management and safety advantages. It also addresses the need for legislation and standardisation of Intelligent Transportation Systems (ITS) across Europe, as current rules and regulations regarding speed and distance vary between countries.

Under the EcoTwin consortium, DAF, TNO, and Ricardo joined forces to make this demonstration possible. The core of the 'EcoTwin' technology setup is a sophisticated vehicle-to-vehicle (V2V) communications solution, RoadLINK, developed by NXP. It uses the wireless communications standard IEEE 802.11p combined with NXP radar technology to empower the trucks within the platoon to securely exchange information in real time and automatically brake and accelerate in response to the lead truck.

The high speed of communication and responsiveness of NXP RoadLINK technology allows extremely tight distances and truly synchronous driving between the platooning DAF Trucks: To demonstrate autonomous acceleration and braking, the planned distance between the vehicles is slated for 0.5 seconds–which, when traveling at 80kph (50mph), translates to a distance of only 10 metres (30ft). The responsiveness of the trailing truck within the platoon is estimated at 25 times faster than the average human reaction time of one second—saving critical time in case of emergency braking.

NXP trucks

Figure 1: Kick off European Platooning Challenge at DAF factory Westerlo Belgium. From left to right, Christophe Leurident (Advisor Belgian mobility Minister Galant), Ron Borsboom (Director of Product Development DAF), Maurice Geraets (Director New Business NXP), Leo Kusters (Managing Director Urbanisation TNO), Gert Liefting (Managing Director Ricardo Netherlands)

The RoadLINK communication system designed by NXP is built into the mirrors of the DAF Trucks participating in the platoon. The redundant NXP V2V system design with four secure channels ensures extremely reliable communication. In addition to providing the platooning commands, it provides real time video and bi-directional audio communication between the two vehicles. The audio allows the drivers to talk to each other without relying on other communication channels, such as cellular networks. Furthermore, the V2V powered camera in the lead truck streams what it "sees" to the driver in the trailing truck, providing a clear look at the road ahead.

"We're honoured to be part of the European Truck Platooning Challenge as a key partner and provider of the secure vehicle-to-vehicle and radar technologies for the DAF trucks –DAF and other truck platoons will use our technology to complete their journey safely and effectively," said Torsten Lehmann, senior vice president of Car Infotainment and Driver Assistance for NXP. "NXP is helping to improve fuel efficiency, emissions, safety, and traffic flow in the European Union, while avoiding accidents and saving lives."

"It goes without saying that there is still a lot of continued development required before we can introduce platooning as a new technology on the market," said Ron Borsboom, member of DAF Trucks' Board of Management and responsible for product development. "This is definitely not a process that will be complete before 2020. There is still a great deal that has to be sorted out in terms of legislation, liability and acceptance. In conjunction with NXP, TNO, and Ricardo, we will be demonstrating during the European Truck Platooning Challenge that truck platooning is technically possible. This demonstration should pave the way for truck manufacturers to be allowed to carry out further testing of the technology on public roads in order to acquire even more experience. It is now up to politicians to make this possible."

NXP's radar solutions and RoadLINK technology are used in several of the truck platoons that participated in the April 6 event in the Netherlands. NXP's vehicle-to-vehicle (V2V) and vehicle-to-infrastructure (V2I) technology is essential for the continued development and advancement of self-driving cars and macro-traffic management. It helps vehicles automatically exchange information on speed, position and direction with other automobiles in their vicinity and enables vehicles and infrastructure to communicate traffic management data or hazards such as localised speed limits, traffic signaling and road works warnings, hazardous locations and more. This can significantly improve traffic flow, decrease accidents and reduce fuel consumption and emissions. NXP is cooperating on V2X technologies with car OEMs and major industry players including Siemens, Harman, Delphi and Cohda Wireless. NXP's RoadLINK will be implemented in series cars starting this year as part of the Delphi V2X platform.




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