A Comprehensive Survey of Digital Twins and Federated Learning for Industrial Internet of Things (IIoT), Internet of Vehicles (IoV) and Internet of Drones (IoD)

As a result of the advancement in fourth industrial revolution and communication technology, use digital twins (DT) federated learning (FL) Internet Things (IIoT), Vehicles (IoV), Drones (IoD) is increasing. However, deployment DT FL for IoV challenging. In this survey, we focus on IIoT, IoV, IoD. Initially, analyzed existing surveys. paper, present applications We also open research issues future directions.