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	Podcast:		UC Science Today
	Episode:		How WiFi signals may optimize heating and cooling systems
	Category:		Science & Medicine
	Duration:		00:01:02
	Publish Date:		2016-10-22 19:00:00
	Description:		WiFi networks are so ubiquitous and now researchers are working on novel ways to utilize existing signals – including figuring out how to optimize heating and cooling systems in homes or buildings. But how? "You need to be able to estimate your occupancy with WiFi signals." That’s Yasamin Mostofi, an associate professor of electrical and computer engineering at the University of California, Santa Barbara. She runs a research lab there on mobile sensor networks. "That’s something that we’ve been doing more recently – trying to count people with just WiFi signals. Over the whole building, you will have more WiFi links and so then you can extend it to larger areas. So basically the WiFi card is just recording its received power for a period of time and just from that signal, we want to figure out how many people were there, which areas are more crowded? Then the heating and cooling can be optimized accordingly."
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