Extending recharging cycles of mobile devices with intelligent use of wireless interfaces

The increased usage of smartphones and the rich ecosystem of Internet applications are having a severe effect on the recharging cycles of devices due to the increased levels of energy consumption and limitations of battery technology. As the infrastructure of hotspots for Wi-Fi and TVWS (TV White Space) interfaces have become ubiquitously available in urban areas, the energy usage in modern devices for transmitting a fixed amount of data could differ drastically due to the significant difference on the achievable data rates on these radios. As a result, techniques that can reduce the energy cost for Internet applications with emphasis on the client side would effectively increase the battery lifetime of digital devices. To this end, we introduce a strategy that deploy roadside infrastructure Wi-Fi Access Points (AP) and determine available spectrum (TVWS) at a given location to assist the data delivery for mobile devices according to corresponding on-line service features of mobile applications. In this framework, we incorporate a probabilistic analysis for spectrum availability and cell residence time of vehicle mobility. Numerical investigations reveal that the proposed set of schemes could increase the battery lifespans by up to 25%.