“If only I had known sooner…” – a typical thought in critical traffic situations. Timely and precise information is an important aspect in future safety and traffic efficiency systems.

On 25 May 2011 the multi-industry Cooperative Cars Extended (CoCarX) research project demonstrated its findings. The project had set out to investigate next-generation cooperative applications based on cellular networks. Excellent feedback was received from the over 80 visitors from automotive and telecom industries public sector academia and press.

Employing an Ericsson LTE test network set up at the Vodafone Test Centre in Düsseldorf three scenarios were presented using two prototype Ford vehicles:

  • a warning message due to sudden braking of a vehicle ahead – demonstrating the low vehicle-to-vehicle delay times enabled by LTE
  • instant push of location-dependent traffic information to the driver’s compartment
  • parallel video transmission to vehicles aimed at demonstrating the LTE system capacity.


One major outcome of the project was the finding that an LTE cellular system can transfer messages from one vehicle to a server in the cellular network and back to other vehicles in clearly below 100 ms. With such low V2V delay increased system capacity and a higher cost efficiency LTE is a perfect carrier medium even for time-critical V2X communication.

Multiple services can efficiently be delivered to a car using advanced session management which makes it possible to bring in different services to the car over one radio connection. These services can be assigned different priorities during the transmission e.g. to ensure that a video download doesn’t slow down an important warning message. The different services can also separately be billed with tailored tariffs matching the business model of the respective service. Modern service enablement functions complete the package e.g. by providing location-aware message delivery using a GeoMessaging enabler.

The research in CoCarX also clearly shows that the cellular network can be combined with ad-hoc based approaches such as 802.11p into one heterogeneous communication system. This leverages the strengths of both systems and forms a combined overall solution that is much more than just the sum of its parts.


For more information please contact Rene Rembarz. Click here to read previous news item on CoCar.




Link to original Article


Original Publication Date: Mon 20 Jun 2011