Car to Car Communication System is also called as Inter-Vehicle Communication System. Car-to-car communication (C2CC), often referred to as vehicular ad hoc networks (VANETs). Car-to-car communication allows direct communication between any two cars if direct wireless connectivity exists. In the case of no direct connectivity, multi-hop communication is used, where a data packet is forwarded from one car to another until it reaches its destination. Vehicle-2-Roadside Infrastructure Communication will be interoperable with the specified inter-vehicle communication standard.

For drivers of vehicles, information about their immediate vicinity is crucial for being able to drive safely. So far most information is gathered by direct visual observation and in response to sounds. Some enhanced information on road conditions is available via radio warning, and navigation support is also becoming state-of-the-art. Car-to-car communication is a promising technology that will considerably improve the driver’s safety and comfort. While the today’s safety systems basically provide a sensing of the vehicle’s environment, with car-to-car communication the vehicles are able communicate by means of multi-hop communication among each other and with road side gateways for Internet access.

Car-to-car communication aims at increased driving comfort and safety. Moreover, it changes the role of vehicles from mere transportation means to “smart objects”. this technology still poses multiple challenges on the wireless transmission and network protocols. Aspects like efficient message dissemination, network scalability, and information security mechanisms are still major research areas in the area of vehicular ad hoc networks.

Car to Car Communication System Advantages

  • Reduction of the number of accidents and their severeness will be achieved with preventive road safety systems based on C2C communications.
  • With Car to Car Communication System, vehicles will be able to communicate with one another using data collected by systems such as rain sensors, ABS and temperature gauges. These data can provide insights on current road or weather conditions, then be relayed to others.
  • Improved traffic flow: Because the On Board Unit (OBU) in the vehicle communicates with the traffic signal, the driver knows when the next signal change occurs, allowing him to adjust operation of the vehicle accordingly. This can reduce traffic congestion frequency.
  • Increased safety: Vehicle sensors register accidents, including the level of severity. The vehicle transmits the accident information to the next Roadside Unit (RSU) and a high-priority emergency call is disseminated throughout the mesh network.

Car to Car Communication System Design Challenges

  • Issues like quality of service (QoS) and high speed real-time communication will have to be tackled to enable on-the-fly collision warning or autonomously driving vehicles.
  • The design and provisioning of attractive car-to-environment or car-to-infrastructure services is crucial for the successful market introduction of C2CC systems.
  • Car-to-car communication and its services will only be a success and accepted by the customers if a high level of reliability and security can be provided.