Carlos Manuel Rodrigues Machado Autonomic Ubiquitous Computing

In a system, the binding between events can be implemented in the sensor, in the actuator
or in mixed function devices (devices that can sense and act in an environment). This
characteristic allows the distribution of the processing load throughout the environment devices.
Figure 7, it is shown a device with the capability of sensing and actuate in the environment.
This device executes internal binding, reporting at the same time the events, which in turn allows its
external usage. If the network interface of the device has the capability of receiving external events,
it can bind it with internal action (generating the appropriate command events).
Environment
Variable or
Event
Action
Sensor and Actuator device
Command
Event
Acquisition
Binding
Execution
Sensor Event
Feedback
Event
Figure 7 – Event bind inside a device
Sensor Events
Command Events
Feedback Events
The binding between events and command events tend to be simple and limited by the
computing resources of the devices that compose the system. They can be configured remotely by
an upper-layer device that monitors the events and produces the bindings that can be configured in
the devices. This allows the environment to embed the habits of the user. A basic binding is
configured in the construction of the devices making them prepared to execute basic functions
immediately from the first power-up.
- 74 -