Page 129 - Reference framework for integrated management of an SSC - A U4SSC deliverable on city platforms

• Third-party applications (open data).
• Other public services and Administrations.

• Accountability (transparency).

6.3.2.8.9 Availability

This is one of the most critically important elements. The Platform must guarantee the operational
continuity of the services it provides, which, in many cases, could require 24x7 operation and an
availability level higher than 99.9 per cent.

Achieving these availability goals involves the adoption of redundant/fault-tolerant physical
architectures in computing and storage, energy, and communications.

6.3.8.3 SSC Platform-layered model

City platforms have been designed under the paradigms described in the chapter on technological
architecture's objective reference. City Platforms incorporate advanced functional blocks and
different interoperability functions to integrate the existing city infrastructure and facilitate
interoperability.

This model has been built as a multilayer architecture and is designed to meet interoperability
requirements. For its development, several Smart and Sustainable Cities platforms existing today
have been taken into account.

In this multilayer model, the elements that can comprise the Platform are described, leaving aside
the infrastructure aspects, according to the following layers:

• Acquisition/interconnection
• Knowledge

• Interoperability

• Services
• Support

The infrastructure and communications of the elements in each layer, shown for information in
Figure 38, have been referred to in previous paragraphs.

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