Internet protocol (IP) based telephony is rapidly gaining acceptance over more traditional means of voice communication. And, wireless LANs are also becoming ubiquitous due to their inherent ease of deployment and decreasing costs. In enterprise Wi-Fi environments, voice over internet protocol (VoIP) is a compelling application for devices such as smartphones that have 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.


Cell2Notify is a practical and deployable energy management architecture that addresses this issue by leveraging the cellular radio on a smartphone to implement wakeups for the high-energy consumption Wi-Fi radio. Cell2Notify also provides a mechanism to send notifications to phones using the caller ID of incoming calls.

Patent, paper, and presentations