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High-Level Architecture

ctOP occupies a crucial position within the Service Layer of a four-layered smart city architecture, encompassing Device, Network, Service, and Application layers. This strategic placement allows ctOP to act as a central middleware component, bridging the gap between the Network and Application layers. Let's explore the key aspects of this architecture:

ctOP within the Smart City Ecosystem:​

  • Four-Layered Architecture: ctOP resides within the Service Layer, interacting with the Network Layer below (handling low-level communication) and the Application Layer above (providing services to applications).
  • Middleware Functionality: ctOP acts as a middleware, translating between the oneM2M standard used in the Network Layer and the needs of applications in the Application Layer.

ctOP architecture

Hierarchical Data Model:​

  • Domains: The data model is organized into Domains, representing distinct areas of application within the smart city (e.g., transportation, environment, energy).
  • Sensor Types: Within each Domain, Sensor Types define the variety of sensors based on their Key Performance Indicators (KPIs) or parameters they measure.
  • Nodes: Individual instances of Sensor Types are represented as Nodes, corresponding to physical IoT devices in the real world.

ctop-data-model