  Nowadays, the internet of vehicles (IoV) has been evolved into the stage of
vehicle to everything (V2X). However, the majority of existing work focuses on
the motor-vehicles. In contrast, the sharing bicycle system is vastly and
rapidly deployed as a feasible internet of things (IoT) application scene for
the last mile problem (e.g., from station to home/office). Moreover, the
internet access of current V2X is relied on the back-haul to roadside unit
(RSU) connections. In this paper, other than prior work, we propose a versatile
V2X system with a distributed framework and heterogeneous caching method. All
the vehicles and devices on-the-road (motor-vehicle, non-motor-vehicle,
pedestrian, etc.) are comprehensively included in the proposed networks. We
further introduce a heterogeneous cache method for effective wireless
transmission while utilizing the massive connected devices. The potential
research trends on achieving high speed transmission, deep programming
dedicated network slicing are highlighted as well as the big data, machine
learning (ML), fog computing based image recognition and reconstruction, to
provide some insights for future studies. Finally, the challenging issues,
i.e., urban street canyon path loss and channel models, ultra reliable
communication and low latency requirements, are discussed.
