|image credit Computerworld|
What if we suddenly decide to exclude human beings from this equation? How would that change the picture? But then, the Internet is a mechanism to transfer information, or rather data, from point to point -- so if there were no human beings in the picture, who would transmit information and who would be there to receive it? To understand this puzzle, let us consider the following scenarios :
- At dusk, a light sensor, a device that can sense the intensity of ambient light, sends a message to the switch that activates street lamps. When day breaks, the same sensor sends another message to to the switch to turn off the same lamps.
- The electricity meter in the basement sends the monthly reading to the computer that generates the electricity bill the customer.
- The odometer in your car sends information about the number of kilometers that you have driven to a computer in your auto insurance company that has insured your car, not for a calendar year as is usually done, but for 20,000km of actual travel.
In each of these cases we have no humans involved. Instead, we have machines or instruments “talking” to other machines or instruments connected to each other with the same technology that is used to operate the Internet. When this happens over private communication channels that has been created within a single organisation then it is referred to as Machine-to-Machine (M2M) technology but when the data transport uses the public Internet platform that we are all familiar with, because of our daily usage of the Web, then we have the Internet of Things or IOT.
The Internet of Things or IOT is critically dependent on the availability and affordability of smart devices. The standard issue electricity meter, installed by the electricity distributor company, cannot be a part of the IOT because it is not designed to transmit its information anywhere. Neither is the standard odometer that is installed in any car. But going forward, as technology changes, we are going to see more and more of these smart devices replacing the otherwise non-smart devices that we are currently used to seeing around us. Where all would these smart devices impact our lives?
- Home Automation - where we would have lights, air-conditioners, microwave ovens, door locks, televisions connected to the Internet and managed through a web interface or a smart phone.
- Smart Cities - street and traffic lights, air pollution sensors, car counters, electricity meters, police CCTV cameras, temperature, humidity and rainfall sensors can all be connected and managed through IOT
- Automobiles - already contain many computer controlled components and these can send information to manufacturers, garages for fault diagnostics and preventive maintenance. With the advent of the Google self-driving cars, car to car communication can eliminate traffic accidents completely.
- Health Management - monitors worn on the body can record and transmit health parameters, like pulse rate, blood pressure, calories burnt in exercises to personal or hospital computers for analysis and necessary action.
Today, nearly 3 billion people, or about 40% of the global population uses the Web (and hence the Internet) but going forward Gartner estimates that by the end of 2015 there will be around 4.9 billion things connected to the IOT. Gartner expects this number to rise to 25 billion by 2020 while other more aggressive estimates put the figure at 50 billion. But for this to happen we need to have devices that are not only “smart” -- in being able to communicate with each other, but should have three other characteristics. First they should be able to access the Internet without having to be connected to physical local area network or WiFi network. Second, they should have an independent power source and need not be tied to a power socket on the wall. Finally they should have a way of sensing the physical environment without needing a human being to enter data through a keyboard or similar input device.
Fortunately, the technology necessary for all this to happen is very much available today. For example, RFID, Bluetooth, 3G, 4G technology can transfer data across “air gaps” and into boxes and wires that constitute the Internet. Long lasting batteries or batteries that can be charged by solar power or through wireless technology are also available. In the world of sensors, we have long had complex industrial processes being monitored and controlled by instrumentation designed and developed by mechanical and electrical engineers. But the challenge lies in bundling all three requirements into a one small, light, inexpensive and portable product that can proliferate easily within the human ecosystem.
With the emergence of smartphones and related infrastructure, such a device is very much a reality. Not only are these “devices” perpetually connected to the Internet over WiFi, 3G or 4G, but they already have a range of sensory devices built into them. For example a standard Android phone has motion sensors, like gravity sensors, accelerometers and gyroscopes that measure acceleration and rotational forces, environmental sensors, like thermometers, barometers, photometers that measure ambient temperature, pressure, humidity and illumination levels, position sensors that can detect object in the proximity of the device or the geographical latitude and longitude, plus cameras and microphones that can detect and record images and sounds. Such standard Android phones can be extended with specialist sensors, as in the case of LifeWatch V phone, that can carry out a battery of medical tests that include one-lead ECG, body temperature, blood glucose, heart rate, blood oxygen saturation, body fat percentage and stress levels as expressed by heart rate variability.
A simple example of an actual use of the Internet of Things is when we observe traffic congestion on specific roads with Google Maps. This data is automatically being collected from the motion sensors of hundreds of anonymous Android users who are moving along that road at this instant of time, processed for statistical validity and sent to any Google Maps user who is interested.
With 3 billion smartphone users and 82% of them using Android, we can safely claim that 2.4 billion IOT-compatible devices are already in the market and this number can only grow faster and faster! Android devices are now moving out smartphones and powering a range of devices like television sets, automobiles and other objects of daily use. In fact, Google has acquired a home automation company, Nest, and is pushing Brillo, a derivative of Android, as an IOT platform for home automation.
Smartphones are not and will never be the only constituent component of the Internet of Things -- there are hundreds and thousands of other devices based on many other technologies that will add up to the 50 billion devices in the IOT by 2020. However smartphones are available here and now and we already have 3 billion of them and counting! Hence they will play a very significant role as pathfinders through this new terrain and will be the harbingers of the Internet of Things.
If you have smartphone in your pocket, pat it lovingly -- it will be your access point for the Internet of Things, just as the Netscape browser (the forerunner of today’s ubiquitous Mozilla) was the magic passphrase "Open, O Simsim” to the wonders of Aladdin's cave called the World Wide Web.