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Unleashing the potential of the Internet of Things 5

In practice, the ICT solutions adopted by EHM services vary among different scenarios and use cases.
For example, as shown in Appendix I, an EHM service in community scenarios generally uses fixed
devices and wired network technologies for network access, while in mobile scenarios, an EHM
service uses mobile devices and wireless network technologies for network access. Actually, for real
deployment scenarios, the situation is possibly even more complex than that described in Appendix I.
Standardization is one way to reduce the negative impact of ICT heterogeneity on customers.
High-level standardization approaches with respect to EHM services, technical details related to
specific devices, gateways, platforms and application servers used in the large variety of EHM service
deployments lie outside the scope of this Recommendation. In this perspective, this Recommendation
uses the concept of "component" on behalf of this large variety of specific EHM devices, gateways,
platforms and application servers, and focuses on general characteristics of EHM devices, gateways,
platforms and application servers.
Five types of component are identified in this Recommendation: EHM terminal, EHM end point,
EHM gateway, Internet of things (IoT) platform and EHM application server.

For each component, "layers" as specified by the IoT reference model [ITU-T Y.2060] are introduced
as an abstraction to illuminate the functionalities of the component.

The capabilities of a layer represent at high level the layer's functions.
NOTE – These functions are represented as functional entities at a detailed functional level.
A given component includes at least the capabilities of one of the layers as shown in Figure 1.

Figure 1 – Capabilities and layers in a component

Clauses 7 and 8 introduce the EHM conceptual framework and the EHM capability framework,
respectively.

7 EHM conceptual framework
The EHM conceptual framework is used to identify functions and relationships of the different EHM
components in order to support the EHM capability framework.

7.1 EHM conceptual framework overview

The EHM conceptual framework, shown in Figure 2, exhibits the components for the deployment of
EHM services: EHM end point [ITU-T Y.2065], EHM terminal [ITU-T Y.2065], EHM gateway, IoT
platform and EHM application server.

The EHM end point is an EHM device connected with the communication network through
gateway(s).

Rec. ITU-T Y.4408/Y.2075 (09/2015) 663