Towards Cost-Effective Utility Business Models - Selecting a Communication Architecture for the Rollout of New Smart Energy Services Topics: Algorithms for Reduced Power, Energy and Heat; Case Studies, Business Models and Innovative Applications for Smart(er) Cities; Energy Monitoring; Green Communications Architectures and Frameworks; Load Balancing in Smart Grids; Security and Privacy; Service Innovation and Design to Support Smart Cities; Smart Homes (Domotics) In Proceedings of the 7th International Conference on Smart Cities and Green ICT Systems SMARTGREENS - Volume 1, 231-237, 2018 , Funchal, Madeira, Portugal