A Duke University graduate student, Justin Manweiler, has discovered a way to effectively double the battery life in devices with Wi-Fi by using a method that doesn’t change the device’s features directly, according to Network World.
The technique basically regulates the timing and duration of Wi-Fi radios’ sleep cycles, allowing data transferred to be scheduled more efficiently.
The scheduling technique, dubbed SleepWell, was tested on smartphones on a 802.11n network and showed energy reductions of between 38% to 51% during a variety of activities including watching video on YouTube, listening to Pandora and Last.fm Internet radio offerings, and large data transfers. The study found that as transmissions drop in their bit rate, energy gains increased.
“In light of these results, we believe that SleepWell may be an effective solution for the future, not only to sustain a demanding suite of [mobile] applications, but also to improve ‘immunity’ to increasingly dense Wi-Fi environments,” the researchers wrote.
The paper, “Avoiding the Rush Hours: Wi-Fi Energy Management via Traffic Isolation,” was presented at the MobiSys Conference and is authored by grad student Justin Manweiler and professor Romit Roy Choudhury.
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