SleepWell helps smartphones manage downloads and battery life
A new software program, SleepWell, helps Wi-Fi-enabled smartphones manage downloads and battery life.
W-Fi is a major drain on batteries, especially around other Wi-Fi devices in the neighborhood (or at Starbucks). In such cases, each device has to "stay awake" before it gets its turn to download a small piece of the desired information.
Researchers found that battery drainage in downloading a movie in Manhattan is far higher than downloading the same movie in a farmhouse in the Midwest.
Duke University-developed software eliminates this Wi-Fi drainage problem by allowing mobile devices to sleep while a neighboring device is downloading information. This not only saves energy for the sleeping device but for competing devices as well.
verything is always 100% better after a nice little nap, and Wi-Fi is no exception. By allowing smartphones to take sub-second naps while waiting to transfer data, it's possible to double battery life with just a clever piece of software.
You may think that your smartphone is continuously downloading data when you're streaming a YouTube video over Wi-Fi, but that's not exactly how it works, especially if you're connected to a Wi-Fi router that's trying to juggle a bunch of different devices at once. Instead, what happens is that your device gets sent a glop of data, and then waits around while the router serves whatever other devices are connected to it before sending you another glop.
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All of this waiting around is just battery life that your smartphone is wasting by being connected to a Wi-Fi access point while not actually doing anything. Justin Manweiler, a computer science graduate student at Duke's Pratt School of Engineering, has figured out that by instructing smartphones to enter a Wi-Fi sleep mode while they're waiting for data, it's possible to cut their power consumption in half.
The system that Justin has developed is called SleepWell, and it's intended to be installed on access points (like routers) meaning that your smartphone can benefit from it without you even having to do anything at all. In fact, you won't even notice that your device is snoozing half the time, you'll just notice that hey, I have a bunch more battery life all of a sudden, awesome!
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