In today’s fast-paced and competitive market, drivers can demand internet based connectivity, social media and streaming infotainment within their cars. But before tomorrow’s cars are truly connected cars, OEMs and suppliers have to first find effective ways to manage today’s smart data transfer challenges. To help in understanding this topic area better, Automotive IQ has produced an exclusive report called: "On the Verge of Tomorrow: Managing Data Transfer Challenges for Smart Cars" Download it here: http://bit.ly/SlideshareSmartData

1. On the Verge of Tomorrow
Managing Data Transfer Challenges for Smart Cars
Modern vehicles include a multitude of special technologies for ensuring safety. Advanced
Driver Assistance Systems, Active Breaking, Night Vision or Adaptive Cruise Control are some of
the technologies needed for today’s and future road safety. All these systems require
information from local sensors to interact with the vehicle: Primary sensors, e. g. Radar (radio
waves), Sonar (sound propagation), Lidar (light detection and ranging) and Camera (camera-
based object detection).
Car-to-X-communication will revolutionize tomorrow’s driving with the help of intelligent
mobility. This refers to radio-based exchange of information and data between vehicles (car to
car) and infrastructure (car to infrastructure). The data collected by the local sensor networks
of each vehicle will be loaded into an independent cloud (Big Data). This method relies on a

2. network of individual vehicles: The more the vehicles, the greater the security network.
Vehicles can be addressed directly with the help of this technology, for example, in case an
emergency vehicle needs a clear road or in order to improve traffic flow by controlling traffic
signals.
Car-to-X communication enables cars to be aware of their surroundings, status and routes with
ever more precise information on speed, position, and direction of travel. The interaction
between individual cars, infrastructure and internet based systems is an Intelligent Transport
System (ITS). But what about the constraints for data exchange?
Data Exchange Constraints
Whatever technology is used for Car-to-X-communication, it is critical that information is
distributed to relevant parties effectively depending on their location and within the required
timeframe. The nature of the challenges involved varies between the different types of
messages.
Warning Messages:
Warning messages are event driven messages that warn of immediate danger such as imminent
collision to one or more vehicles, these messages must be delivered in real-time. These
messages are relatively infrequent, however, they must be delivered immediately and only to
targeted vehicles, since if they are delivered to the wrong vehicles they could cause accidents.
Heartbeat messages:
In the context of Car-to-X messages, heartbeat messages are information about actions that a
car is about to engage in. Depending on similar messages in other vehicles in an area, heartbeat
messages could trigger warning messages in the transmitting vehicle or another one, for
instance if a car signals it wants to overtake on a single lane road while an on-coming car has
signaled acceleration.
Non safety messages:
Infotainment, internet access, communication to enterprise and similar are relatively low
priority uses for Car-to-X-communication.
For a Car-to-X-communication system to be successful it must be able to deal adequately with
the high mobility of cars in wireless communication systems. In order to deliver the different
types of messages described above in Car-to-X communication, the following factors must be
addressed and adequately met: