Energy Harvesting in Wireless Communications

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Presentation transcript:

Energy Harvesting in Wireless Communications Communicating with Energy Harvesting Transmitters and Receivers KAYA TUTUNCUOGLU and AYLIN YENER Energy Harvesting in Wireless Communications Wireless networking with energy harvesting nodes: Green, self-sufficient nodes, Extended network lifetime, Smaller nodes with smaller batteries, Very limited and varying energy. Fujitsu’s hybrid device utilizing heat or light. Nanogenerators built at Georgia Tech, utilizing strain Wireless sensor networks System Model and Energy Feasibility Unifying model for any network topology with arbitrary utility function. Green communications Various other applications Energy Causality: Battery Capacity: Optimal Transmission Policy Simulations Average utility maximization problem EH Transmitter w/ adaptive modulation EH Receiver w/ linear storage cost Both nodes with 50mW base power Harvests iid, ~U[0,100mW] Simplifying the problem Concavification for EH Tx-Rx pair Inner Problem Outer Problem Generalized Water-Filling Water-filling with generalized water levels: t O → Water levels (vj,i) Concavity of U(ε,α) This work is supported by NSF Grant #0964364