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8.3 Functional entities of the WoT resource management functions (WoT RMF)

The WoT RMF manage resources that are used for the WoT service. The WoT RMF can register
resources into a resource information repository and can delete them. The resources are provided by
the WoT broker functions and the web. The WoT RMF consists of four functional entities; the WoT
enrolment FE (WoT-EN FE), the WoT broker management FE (WoT-BM FE), the web resource
management FE (Web-RM FE) and the WoT description management FE (WoT-DM FE).

Figure 6 – Functional entities and interfaces of WoT RMF

8.3.1 WoT broker management functional entity (WoT-BM FE)
The WoT-BM FE is responsible for registering information of each WoT broker function with
related information such as location, owner, their services, etc.
The WoT broker functions are responsible for providing physical devices as the web resources. The
WoT broker functions reside in the WoT resource support functions area. However, there can be a
large number of brokers and each WoT broker provides a number of different web resources.
Therefore, in order to provide efficient WoT service management of the WoT a broker is necessary.

8.3.2 Web resource management functional entity (Web-RM FE)
The Web-RM FE is responsible for managing the web resource with the resource information
repository.

There are many types of content on the web such as image, video, music, documents, weather
information, and text as a virtual things. These virtual things are ready to be exposed on the web
and the WoT service provider uses them to create new WoT services. The Web-RM FE interworks
with the resource information repository to manage these virtual things.

8.3.3 WoT enrolment functional entity (WoT-EN FE)
The WoT-EN FE provides a capability to support the WoT service enrolment, e.g., submission and
registration. The web resource functions submit information of the web-enabled things to the
WoT-EN FE. The WoT-EN FE checks and filters them using the enrolment policy.

The WoT-EN FE also manages the enrolment policy. The WoT-EN FE updates and deletes the
enrolment policy according to the changes on the information and context of the WoT service. The
following are functions of the WoT-EN FE:

– Submission handling: The WoT-EN FE receives the enrolment request from the WoT
enabled things. For the request, these WoT services can submit their information such as IP,
descriptions, name, URI, capability, related services, etc. Then the WoT-EN FE allows or
blocks the request based on the enrolment policy.

Rec. ITU-T Y.4414/H.623 (11/2015) 801