To provide public federated learning services based on the Compute First Network, the Federated Learning Platform is proposed for communication service providers in this paper. Operation and security are taken into consideration to assure and secure service delivery. The generic framework of Federated Learning Platform is designed to meet the fundamental requirements. Based on the TM Forum Business Process Framework, the specific operation functionalities are introduced. Also, those security issues are addressed by adding a security domain, and a cryptography infrastructure is particularly discussed herein to make connections among the federated communication parties trusted, ensuring mutual authentication and interaction data protection.