  Compared with today's 4G wireless communication network, the next generation
of wireless system should be able to provide a wider range of services with
different QoS requirements. One emerging new service is to exploit cooperative
driving to actively avoid accidents and improve traffic efficiency. A key
challenge for cooperative driving is on vehicle-to-vehicle (V2V) communication
which requires a high reliability and a low end-to-end (E2E) latency. In order
to meet these requirements, 5G should be evaluated by new key performance
indicators (KPIs) rather than the conventional metric, as throughput in the
legacy cellular networks. In this work, we exploit network controlled direct
V2V communication for information exchange among vehicles. This communication
process refers to packet transmission directly among vehicles without the
involvement of network infrastructure in U-plane. In order to have a network
architecture to enable direct V2V communication, the architecture of the 4G
network is enhanced by deploying a new central entity with specific
functionality for V2V communication. Moreover, a resource allocation scheme is
also specifically designed to adapt to traffic model and service requirements
of V2V communication. Last but not least, different technologies are considered
and simulated in this work to improve the performance of direct V2V
communication.
