Page 54 - Reference framework for integrated management of an SSC - A U4SSC deliverable on city platforms

Figure 9: Vision of the ICT architecture of an SSC

Representing these aspects in a unified ICT architecture is complex due to the great variety and
heterogeneity of the components that constitute it, and also to the difficulty of its development and
implementation. All these components need to be modelled to ensure that the ICT architecture of
a Smart City is complete and logical and meets the required business objectives.

In addition, different industry players are involved in the development of the architecture: equipment
manufacturers, telecommunications operators, software companies, systems integration, and
developers of business solutions.

Due to the heterogeneity of the different components of the architecture, a hierarchical classification
model has been established by a similar group of functionalities and defining relationships with
other groups. This “layering” model is commonly used in industry and provides flexibility and
scalability:

• It is easier to design and operate each layer separately than to design and operate the entire
architecture as a single entity.
• Each layer can be defined independently of the other layers and classified based on similar
functions.

• Each layer has its own functions and establishes relationships with adjacent layers or with the
external environment through a client-supplier model.

• Each layer can possess its own operation and maintenance capabilities, as well as safety and
security functions in the event of failure.

• A layer can be added to or modified without affecting other layers from the architectural point
of view.

Figure 10 proposes a conceptual model that tries to materialize the city semantics described
in previous sections in a model based on layers. This architecture model allows users (people,

40 Reference framework for integrated management of an SSC | June 2023