Issue link: https://te.mouser.com/i/1349110
TE Connectivity White Paper /// V2X - An important building block in Cooperative Intelligent Transport Systems (C-ITS) Page 3 V2X – An important building block in Cooperative Intelligent Transport Systems (C-ITS) For these scenarios, none-line-of- sight applications uses radio con- nections. Applications where V2X will be in- strumental are road works warnings (RWW), electronic emergency brake lights (EEBL), or emergency vehicle warnings (EVW). These are so-called Day-1 applications, as they will be re- alized in the first step of V2X rollout. In all three applications, information can be exchanged between sever- al vehicles or between vehicles and roadwork structures that cannot im- mediately be recognized by follow- ing vehicles resp. their drivers. Such a scenario is shown in figure 1. A public roads trailer sends informa- tion to approaching vehicles (#1). As the road users hit the brake, follow- ing vehicles are automatically in- formed (#2). In this way, V2X con- tributes significantly to the detection of dangerous traffic situations and to early information of road users, thus enabling timely reactions. The idea of vehicle-to-vehicle com- munication is not new. In fact, it has already been established in several applications: Fleet vehicles use mo- bile phone networks to warn each other of icy roads etc. The disadvan- tage of this communication method, however, is its high latency, caused by having to route via base stations. Accordingly, the basic idea of V2X is to enable direct real-time communi- cation between the vehicles them- selves. The most important information in a V2X message is the exact position of the respective road users, their heading, and their velocity. This in- formation is contained in every V2X message and enables predictions about future positions of all involved parties. Access to a GNSS system (GNSS = Global Navigation Satellite System, an umbrella term for GPS, 1. Overview V2X Network connectivity is fast becoming the most important trend in the automotive industry. It all started with connecting the control units within the vehicle. Then smartphones were connected to the vehicle. Today, many cars are able to autonomously collect information from the web. The next logical step will be connecting cars with each other and the environment, using V2X technology. V2X is short for "vehicle to everything". The term describes a vehicle's com- munication with surrounding or interacting road users and structures. For the discussion of the resulting connectivity applications derivatives like V2V (V = vehicle), V2I (I = infrastructure), V2P (P = pedestrian) and V2N (N = net- work) have been introduced. The technology has also been called C2X (C = car), but this name is succes- sively being replaced by the more general term "vehicle". Being able to automatically exchange real-time information between road users features attractive advantages in several ways: 1. Traffic safety Reduction of the number of road accidents, especially fatal injuries 2. Environmental protection, cost and time savings Efficient use of roads and other transport infrastructures for optimized traffic flows and reduced fuel consumption V2X technology will also support autonomous driving. Autonomous vehi- cles require enormous amounts of data for their traffic decisions. Already today, ultra-modern ADAS systems in the vehicle detect the environment. In the future, however, additional information must be exchangeable between vehicles via V2X in order to make information available in so-called non-line of sight (NLOS) scenarios that cannot be detected by conventional sensors. Fig. 1: V2X danger warning communication