We’re still in the midst of digesting what could be termed the “first decade of cloud”, and yet it is already evoking the relentless – though, at the same time, typical of our natural condition as human beings – need to unveil the next “technological futurism” that awaits us: what’s next?
Banking was one of the first sectors in need of telematically connecting its offices and cash machines with Central Services. The arrival of the first point-to-point lines made it possible. Thus, movements made in customer accounts were updated in real time in central computers. While today we take this for granted, it was a revolution at the time.
For more than a decade now, hardware virtualization technology, more commonly known as virtual machines, has been the technology on which the production systems we know and use today in our information society have been based, and has made – in the midst of an economic crisis – the evolution of Internet-connected software and services profitable and sustainable.
The need for real-time communications in Smart Grid scenarios is becoming increasingly important. One of the most common solutions is to have industrial routers send information securely to the different utility control centers.
Following on from a previous article on DSL and its scientific bases, I now want to review the fundamentals of another technology: radio. As with a DSL, the ability to transmit data in any radio communications system – from the very first Marconi experiments to 5G networks – is bound by Shannon’s equation, based on the channel’s bandwidth and signal-to-noise ratio. In radio, we also have another interesting equation that can tell us the received signal strength when the transmitter power and frequency, antenna characteristics and distance to the receiver are known.