317 Chapter 12 Energy Consumption Proile for Energy Harvested WSNs T. V. Prabhakar, R Venkatesha Prasad, H. S. Jamadagni, and Ignas Niemegeers + Contents 12.1 Introduction ............................................................................................. 318 12.2 Energy Harvesting ................................................................................... 318 12.2.1 Motivations for Energy Harvesting............................................... 319 12.2.2 Energy Harvesting: A Possible Solution ........................................320 12.3 Energy Harvesting: Beyond the Solar Harvester—Is It a Viable Option?.321 12.4 Storing Harvested Energy ........................................................................ 324 12.4.1 Energy Harvesting System ............................................................ 325 12.4.2 Experimental Measurement ..........................................................328 12.5 Energy Budgets: System and Network Operations ................................... 329 12.5.1 Energy Harvested Applications: Challenges .................................. 331 12.5.2 Storage and Retrieval of System State ........................................... 335 12.5.3 Toward a Distributed Smart Application: Challenges ................... 336 12.6 Summary ................................................................................................. 338 References ......................................................................................................... 338 K12735_C012.indd 317 10/19/11 8:32 PM