A Novel Incentive Mechanism for Mode Selection Task-Offloading in C-V2X: An Effective Capacity and Contract Approach

Communication mode selections for vehicles play an essential role in relieving road congestion and improving communication quality. In this paper, we investigate the incentive mechanism design problem to efficiently motivate vehicles to undertake the mode selection tasks. Most traditional incentive methods only focus on processing latency, which is usually not the dominant part of the overall latency. Moreover, the sharing-resources indexes adopted in these methods are difficult to be authentically feedbacked to the base station. To address these challenges, we propose a novel contract theory-based incentive mechanism using the effective capacity conception and formulate the contract optimization problem to maximize the utility of the base station under the information asymmetry case. The simulation results demonstrate the effectiveness of the proposed incentive mechanism.