Resource Pre-caching Strategy of Digital Twin System Based on Hierarchical MEC Architecture.

The digital twin system requires the smooth loading and rendering of massive 3D data, and requires certain storage, computing and communication resources. Unlike the traditional video transmission system, the digital twin system needs 3D models to be rendered into high-definition video streams and then transmitted to the client. Moreover, the perspective of the client changes, and it will need to transmit new rendered video streams. Moreover, the system is sensitive to the delay requirements and needs to consume a lot of communication resources. The transmission delay based on the cloud data center cannot be required, which will cause a series of problems of twin devices. MEC can lower cloud resources to the edge of the network. However, the cache resources and computing resources on MEC are limited. Based on the hierarchical MEC network architecture, aiming at the problem of limited cache resources on the edge MEC, this paper designs a pre-cache strategy for the resources of the digital twin system model to improve the utilization of the cache resources of the MEC server and reduce the response delay of the digital twin system perspective change resource request.