Referenzarchitekturmodell Offene Urbane Plattform (OUP)

The DIN SPEC 91357 – Reference Architecture Model for Open Urban Platforms (OUP) is a specification standard developed by the German Institute for Standardization (DIN) and led by the Fraunhofer Institute FOKUS. It serves as a recognized template for the development of integrated digital smart city solutions, aimed at municipalities, technology providers, and urban planners seeking to establish a unified digital infrastructure for urban data ecosystems.

Cities face numerous challenges due to digitalization, particularly in providing urban data through municipal portals like open data platforms. Often, this data is collected and distributed in isolation, resulting in untapped potential for synergies. The central question is how to efficiently manage, control, and utilize urban data streams. The OUP Reference Architecture Model addresses this by creating a logical digital framework that serves as a foundation for interconnected city solutions.

The model aims to overcome data silos by consolidating municipal data from various sectors such as transportation, environment, energy, and administration onto a common platform. It ensures interoperability through standardized interfaces, allowing seamless integration of different systems and services. This facilitates data-driven decision-making, which enhances resource efficiency and quality of life in urban areas.

The OUP Reference Architecture Model consists of eight layers and two pillars, each characterized by specific capabilities and functions: 1. Data Layer: Collects, stores, and manages urban data from various sources, including IoT sensors, municipal registers, and citizen data. 2. Communication Layer: Ensures secure and standardized data transmission between various systems and stakeholders. 3. Services Layer: Provides services and applications built on the collected data, such as traffic management, energy management, or waste optimization. 4. Application Layer: User-oriented interfaces for citizens, administration, and businesses. 5. Security Pillar: Comprehensive data protection and IT security concepts across all layers. 6. Management Pillar: Governance structures for operating and developing the platform.

The original OUP model has been further developed by the Fraunhofer FOKUS through the research project oupPLUS. This extended ICT reference architecture for smart cities links to the DIN SPEC 91357 and addresses additional requirements: - Enhanced Standardization: Connection to European initiatives like the "Memorandum of Understanding – Towards Open Urban Platforms for Smart Cities and Communities" of the EIP-SCC. - Modular Scalability: Cities of various sizes and capacities can adapt the model to meet their specific needs. - Practical Implementation: Concrete implementation guidelines and best practices from German municipalities are provided.

The OUP specification has significantly contributed to the development of urban data platforms in Germany. Initiatives like the DKSR (Data Competence Center for Cities and Regions) utilize OUP principles as a foundation for their open-source urban data platform. These platforms process large amounts of data almost in real-time and leverage open technologies like VERT.X and QUARKUS. - Open-Source Approach: The source code of platform software and smart city applications is publicly accessible. - Real-Time Processing: Reliable processing of large data volumes for up-to-date urban information. - Citizen Engagement: Urban data platforms are increasingly designed as value-added systems for citizens.

The OUP model aligns with broader European efforts to establish open urban platforms as strategic tools for urban planning and digital transformation. It bridges technical standardization with practical implementation of sustainable urban development.