Edge cloud is defined in ITU-T Recommendation Y.3508 as cloud computing deployed to the edge of the network accessed by cloud service customers (CSCs) with small capacity resources enabling cloud service. In the edge cloud, the cloud service is provided in the form of lightweight cloud service by CSP. Lightweight cloud service refers to a portion of cloud service to reconfigure the functionality of cloud service to fit on edge cloud such as base station and gateway with small capacity resources. This Recommendation provides the overview of edge cloud, logical components, capabilities for lightweight cloud service and functional requirements of edge cloud through various use cases. .