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Cоnsider а mоbile аpplicаtiоn designed to monitor physical activity, which senses accelerometer data and uploads it to a central server through the 4G network. The upload operation is power hungry and consumes 75 mW of power when active and 10 mW when idle. Suppose there is a particular user who uses the application to track calorie burn during exercise. Every day, the user wears a Nike shoe with a piezo-electric device attached to it and goes for a one-hour run. The device generates electricity from each step at the rate of 10 mJ per step. The user takes approximately 8000 steps on every one-hour run. The user wants the exercise app to be energy neutral. “Energy neutrality” means that if the mobile battery level is when the application starts executing, then the battery level is still after the application finishes executing. If the mobile device is “energy neutral” after application finishes executing. Does it imply that the app effectively consumed its battery power from energy harvesting sources?
Cоnsider а mоbile аpplicаtiоn designed to monitor physical activity, which senses accelerometer data and uploads it to a central server through the 4G network. The upload operation is power hungry and consumes 75 mW of power when active and 10 mW when idle. Suppose there is a particular user who uses the application to track calorie burn during exercise. Every day, the user wears a Nike shoe with a piezo-electric device attached to it and goes for a one-hour run. The device generates electricity from each step at the rate of 10 mJ per step. The user takes approximately 8000 steps on every one-hour run. The user wants the exercise app to be energy neutral. “Energy neutrality” means that if the mobile battery level is when the application starts executing, then the battery level is still after the application finishes executing. What should be the duty cycle of the 4G radio so that the mobile application is energy neutral for 1 hour of app operation?