Tuesday, February 28, 2012

Paper Reading #5: WiFi and Bluetooth fight for bandwidth

Quinnell, R. "WiFi and Bluetooth fight for bandwidth". EDN. 4 Aug 2005. Vol. 50 Issue 16, p73-78.

Quinnell states that WiFi and Bluetooth use the same frequencies of bandwidth and therefore could conflict for resources if not monitored.  The conclusions showed that distance was the greatest factor determining interference among multiple agents trying to access the space.  In 2005, when the paper was authored, the authors state that there was not much worry at the current time about these wireless technologies overlapping to cause problems because there were not many reasons that transponders would be in such close proximity, but predicted by market trends that this could be an issue in the future, which I believe we are seeing today.

One of the biggest challenges in this area seems to be VOIP.  Bluetooth seeks to mitigate these challenges by using a method called frequency hopping, where the device can identify a frequency with traffic on it and tries to move to a less congested frequency.   There are also approaches that coordinate the transmissions between the technologies as well as adjusting packet sizes. 

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