Y.4907 - Reference architecture of blockchain-based unified KPI data management for smart sustainable cities

This Recommendation introduces the concept of blockchain-based unified key performance indicator data management for smart sustainable cities (BKDMS), analyses its common characteristics and high-level requirements, defines a reference architecture of BKDMS and relevant common capabilities，gives a common data structure of KPIs according to the KPIs definition of the ITU-T Y.4900 series.The scope of this Recommendation does not include:• The KPIs definition.• The KPI data value and scope.• Specific technical implementation mechanism of blockchain.