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Wireless Wakeups Revisited: Energy Management for VoIP Over Wi-Fi Smartphones

Yuvraj Agarwal, Ranveer Chandra, Alec Wolman, Paramvir Bahl, Kevin Chin, and Rajesh Gupta


IP based telephony is rapidly gaining acceptance over traditional means of voice communication. Wireless LANs are also becoming ubiquitous due to their inherent ease of deployment and decreasing costs. In enterprise Wi-Fi environments, VoIP is a compelling application for devices such as smartphones with multiple wireless interfaces. However, the high energy consumption of Wi-Fi interfaces, especially when a device is idle, presents a significant barrier to the widespread adoption of VoIP over Wi-Fi. To address this issue, we present Cell2Notify, a practical and deployable energy management architecture that leverages the cellular radio on a smartphone to implement wakeup for the high-energy consumptionWi-Fi radio. We present detailed measurements of energy consumption on smartphone devices, and we show that Cell2Notify can extend the battery lifetime of VoIP over Wi-Fi enabled smartphones by a factor of 1.7 to 6.4.


Publication typeInproceedings
Published inACM/USENIX Mobile Systems, Applications, and Services (MobiSys)
PublisherAssociation for Computing Machinery, Inc.

Newer versions

Robert LiKamWa, Bodhi Priyantha, Matthai Philipose, Lin Zhong, and Paramvir Bahl. Energy Characterization and Optimization of Image Sensing Toward Continuous Mobile Vision , ACM International Conference in Mobile Systems, Applications, and Services (MobiSys), 2013.

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