Monthly Archives: May 2011

Smart phones, the return….

As promised in an earlier edition (see Smart phones to be even smarter), we will look at the use of cognitive engines in mobile communications.

Charles Bostian

Dr. Bostian

Several years ago, Dr. Charles Bostian of the Mobile and Portable Radio Group at Virgnina Tech came up with a way to make radios smart enough to adapt to a changing frequency environment.  That means tune themselves to different frequency bands depending on who is talking to them.  His concept resulted in a patent for the utilization of a cognitive engine in mobile radio communications.

And who uses mobile radio communication devices?  Well, you do, if you have a cell phone.  Cell phones are just two-way radios with some fancy shmancy software.  Even though Bostian initially envisioned communications such as for emergency services like police and fire being able to talk to each other in an emergency, the principles apply equally well to cell phones.

In fact, they may apply even better to cell phones.  Because cell phones not only have to adapt to a multitude of scheduling issues, such as handover from cell to cell, signal strength variations, and data types, but they also will have to be frequency agile in the future.  That’s because most of the contiguous band assigned to cell phone use has been, well, used.  Now they are scavenging bandwith wherever they can find it, and that may actually be in different bands as you travel around the country based on who is using what in each region.  Ay! Carumba!

So, how does this work?  Well, to borrow some info from the VT website, “Cognitive radios are aware of their environment and intelligently adapt their performance to the user’s needs. A CR is a software defined radio with a “cognitive engine” brain. Conceptually, the cognitive engine responds to the operator’s commands by configuring the radio for whatever combinations of waveform, protocol, operating frequency, and networking are required. It monitors its own performance continuously, reading the radio’s outputs to determine the RF environment, channel conditions, link performance, etc., and adjusting the radio’s settings to deliver the needed quality of service subject to an appropriate combination of user requirements, operational limitations, and regulatory constraints. We call these processes “reading the radio’s meters” and “turning the radio’s knobs” for short.”

So, yeah.  There you have it.  Most importantly, that patent that Bostian got a couple of years ago is looking to be very important in enabling this technology for the future.

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Filed under Communications, electronics, Networks, software