Internet of everything
Internet of everything

Start this free course now. Just create an account and sign in. Enrol and complete the course for a free statement of participation or digital badge if available.

3.2.4 Controllers in the fog

Sensors collect data and forward that information to the controllers. The controller can forward any information gathered from the sensors to other devices in the Fog, as shown in the figure.

Recall the example of a smart traffic light system. The sensors detect and report activity to the controller. The controller is able to process this data locally and determine optimal traffic patterns. Using this information the controller will send signals to actuators in the traffic lights to adjust traffic flows.

This is an example of M2M communication. In this scenario, the sensors, actuators, and the controller all exist within the Fog. That is, information is not forwarded beyond the local network of end devices.

Processing data in the fog is occurring in less traditional networking environments. New places in networking, or PINs, are created as more things in various industries connect to the network. Field Area Networks (FANs) place hardened equipment in harsh or exposed environments. Smart Grid is an example of a FAN. More detailed information is available from the Cisco website Field Area Network [Tip: hold Ctrl and click a link to open it in a new tab. (Hide tip)] .

Take your learning further

Making the decision to study can be a big step, which is why you'll want a trusted University. The Open University has 50 years’ experience delivering flexible learning and 170,000 students are studying with us right now. Take a look at all Open University courses.

If you are new to University-level study, we offer two introductory routes to our qualifications. You could either choose to start with an Access module, or a module which allows you to count your previous learning towards an Open University qualification. Read our guide on Where to take your learning next for more information.

Not ready for formal University study? Then browse over 1000 free courses on OpenLearn and sign up to our newsletter to hear about new free courses as they are released.

Every year, thousands of students decide to study with The Open University. With over 120 qualifications, we’ve got the right course for you.

Request an Open University prospectus371