An M2M Access Management Scheme for Electrical Vehicles

M2M communications have recently been introduced in smart grid and vehicular networking environments. Its principles can improve electrical vehicular networking while offering two-way communication between Electric Vehicles (EVs) and Electric Vehicle Supply Equipment (EVSEs). In this paper, we first study the impact of a very large number of connected EVs when attempting to use the random access in LTE-Advanced to communicate with the grid. Second, we propose an effective solution for avoiding congestion on the random access channel of LTE-Advanced for massive EV-2-EVSE communications. In this solution, we differentiate between two classes of service of EVs communications, giving priority to charging demands over other types of messages lower priority messages (promotions, subscriptions, mechanical checks, etc.). Finally, we propose an efficient admission control mechanism to manage EVs M2M traffic on LTE-Advanced and to provide QoS to charging demand messages in terms of strict delay to avoid both a long latency of EV users and a network overload in high offered load conditions.