Service: BSN monitoring

Automatic service: call family

No

Yes

Familiy

available?

No

Automatic service: call ambulance

High blood

pressure?

Yes

Figure 91 : Interacting services for a home-patient monitoring scenario.

Service associated with a Virtual Entity

 Example: Services can be associated with Virtual Entities and these

associations are stored and can be discovered in the IoT system. The

management of these associations can be handled in a centralized

database or in a highly distributed fashion as in a peer-to-peer system,

depending on the characteristics of the underlying system.

Service accessing a Resource

 Example: A service for monitoring air pollution. Sensor nodes are semi-

randomly distributed in a city and measure the percentage of CO in the

air. A remote server runs software that periodically queries the readings

from the sensor nodes, analyses the readings, and monitors the

evolution of the air pollution. In this example, the monitoring software is a

service that accesses multiple resources. The latter are the components

and functions running on sensor nodes, and these components allow

operations such as reading from the sensors.