Page 404 - Unleashing the potenti al of the Internet of Things

4 Unleashing the potential of the Internet of Things

– Mission-specific actuators and motes, designed to be deployed after preliminary setup (e.g.,
mass-produced switches);
– Generic actuators and motes, designed to be instantly deployed and used in a wide range of
SCN applications (e.g., PDAs).
SCN applications have the following general requirements concerning mobility:

1) SCN applications are required to support nomadism for mission-specific and generic
actuators and motes.
2) SCN applications are recommended to support seamless handover for generic actuators and
motes.

8.3 Context awareness

Context information can have a great effect on the decision-making process. Examples of context
information elements include the following:
– Capabilities of SCN objects;
– Location of actuators and motes;
– Presence and operational status of actuators and motes;

– Traffic load and computational load of SCN objects;
– Information about faults of SCN objects.
SCN applications have the following general requirements concerning context-awareness:
1) Context information is required to be collected and distributed to any interested SCN
object.
2) Delays in context information updates are required to be minimized so that the reliability of
the decision making is not decreased significantly.
NOTE – Requirements specific to some context-related aspects are given in other specific clauses.

8.4 Location awareness

Location information needs to be maintained and managed in order to support context awareness
with location information for SCN applications. Management can be in static or dynamic conditions
of the located entities. In addition, SCN application service and device discovery can be facilitated
by the usage of the location information. Thus, SCN applications have the following requirements:
1) Location information of mote groups is recommended to be managed for SCN applications.

2) Location information of actuators is recommended to be managed for SCN applications.
3) Location information of individual mote can be optionally managed for SCN applications
when the location information of a single mote is useful.

8.5 Presence awareness
Presence information includes the network-related part of presence information (e.g., concerning
connectivity and willingness to communicate) and the operation-related part of presence
information (e.g., concerning workability and currently performing operation). SCN applications
have the following requirements:
1) The network-related part of presence information is required to be managed for SCN
applications.
2) The operation-related part of presence information is recommended to be managed for SCN
applications.

390 Rec. ITU-T Y.4250/Y.2222 (04/2013)