Efficient Task Offloading for MEC-Enabled Vehicular Networks: A Non-Cooperative Game Theoretic Approach

摘要

Vehicular Edge Computing (VEC) is a new leading technology to enhance the vehicular performance through task offloading where resource-confined vehicles offload their computing task to the vehicular multi-access edge computing (MEC) networks in proximity. However, the environment of vehicular task offloading is extremely dynamic and faces some challenges to determine the location of processing the offloaded task. As a result, to achieve optimal performance by using traditional VEC system is difficult because in advance we don't know the demand of vehicles. Therefore, a non-cooperative game theory-based efficient task offloading (NGTO) scheme is proposed in this study where the offloading decisions are taken either the MEC server or remote cloud server through the game-theoretic approach. To reduce the processing latency of the vehicles' computation tasks and assure the maximum utility of each vehicle, we used a distributed best response offloading strategy. Our proposed strategy accommodates its offloading probability to achieve a unique equilibrium under certain conditions. Detailed performance evaluation affirms that our proposed NGTO scheme can outperform in all scenarios. It can minimize the response time at almost 41.2 % and average task failure rate at approximately 56.3% when compared with a local roadside unit computing (LRC) scheme. The reduced response time and task failure rates are approximately 25.2% and 20.4%, respectively, when compared with a collaborative (LRC with cloud via roadside unit) offloading scheme.