Co-operative automated driving (CAD) use cases involve group-based
vehicle-to-vehicle (V2V) communications with a wide range of
quality-of-service (QoS) requirements. This work introduces and exploits
fifth generation mobile networks (5G) functional architecture support
for vehicle-to-everything (V2X) applications to address V2V sidelink
radio resource management (RRM) for CAD use cases. A QoS
requirement-aware sidelink resource allocation optimization problem is
formulated for multicast group V2V communications with reliability
constraints and half-duplex limitation. Furthermore, the problem is
analyzed for cloud-based sidelink RRM and a dynamic vehicular
environment. Accounting for the challenges in acquiring channel state
information (CSI), a low-complexity scheduling scheme is presented that
makes use of slowly varying large-scale channel parameters (e.g. path
loss). Simulation results show significant gains in terms of packet
delay performance while meeting the reliability requirements on V2V
links.