In the week of May 19th ~ 23rd 2025, global industry and academic experts in the area of optical communication gathered in Castelldefels (Barcelona), Spain to discuss F5G-Advanced network architecture and future roadmap to F6G, and identify potential open-source implementation driven by TFS and OSL to develop PoCs of the F5G-Advanced architectures. The groups involved were ETSI SDG OSL (Software Development Group OpenSlice), SDG TFS (Software Development Group TeraFlowSDN) and ISG F5G. CTTC hosted all these meetings in its headquarters.

During this week, an open joint session between SDG OSL, SDG TFS and ISG F5G was held for the first time. The intelligent network management & control and the automatic service provisioning of the F5G Advanced networks, which contain multiple fixed network segments, becomes the common interests of these three groups.

ETSI F5G OSL TFS Joint Session Figure1



The International Telecommunication Union (ITU) and the European Telecommunications Standards Institute (ETSI) jointly organized the "ITU-ETSI Symposium on ICT Sustainability: Standards Driving Environmental Innovation", held on 11–12 December 2024 at ITU Headquarters in Geneva, Switzerland. It brought together industry leaders, policymakers, researchers and stakeholders to explore the crucial role of standards in promoting sustainable ICT practices. Standards guide the development of technologies that minimize environmental impact and enhance energy efficiency.