Abstract
Cellular V2X, initially defined under 3GPP Rel 14, establishes a baseline of direct device to device connectivity over cellular networks. Whereas traditional use cases may be enhanced with extended warning times, in fact a hybrid long range and short range approach requires further management of message timing and position tracking, combining differing latencies and multiple sensors into a seamless environmental view. Furthermore, the distances feasible in the presence of cellular infrastructure change the use cases, allowing for new far to near transitional cases, and providing impetus for a more integrated HMI combining information, warning, and safety messages.
