ISO/IEC/IEEE 18882:2017 is based on the protocol defined in IEEE Std 1888?1, IEEE Standard for Ubiquitous Green Community Control Network Protocol, this standard extends component and data type definitions, message formats, and communication procedures for heterogeneous network convergence and scalability. This standard also describes heterogeneous networks interconnection issues and requirements. Also, this standard specifies system architecture and solutions to improve heterogeneous networks convergence and scalability while offering system robustness and supplying better performance in system operation and management.