Energy Harvesting Networks with Energy Cooperation: Procrastinating Policies

Kaya Tutuncuoglu, Aylin Yener

    Research output: Contribution to journalArticlepeer-review

    39 Scopus citations

    Abstract

    This paper considers multiterminal networks with energy harvesting transmitter nodes that are also capable of wirelessly transferring energy to or receiving energy from other nodes in the network. In particular, the jointly optimal transmit power and energy transfer policies that maximize sum-Throughput for the two-way, two-hop, and multiple access channels are identified. It is shown for nodes with infinite-sized batteries that delaying energy transfers until energy is needed immediately at the receiving node is sum-Throughput optimal. Focusing on such procrastinating policies without loss of optimality, the stated joint optimization problem can be decomposed into energy transfer and consumed energy allocation problems which are solved in tandem. This decomposition is shown to hold for the finite-sized battery case as well, using partially procrastinating policies that avoid battery overflows. It is observed that for the two-hop channel, the proposed algorithm has a two fluid water-filling interpretation, and for the multiple access channel, it reduces to a single transmitter problem with aggregate energy arrivals. Numerical results demonstrate the throughput improvement with bi-directional energy cooperation over no cooperation and uni-directional cooperation.

    Original languageEnglish (US)
    Article number7208807
    Pages (from-to)4525-4538
    Number of pages14
    JournalIEEE Transactions on Communications
    Volume63
    Issue number11
    DOIs
    StatePublished - Nov 1 2015

    All Science Journal Classification (ASJC) codes

    • Electrical and Electronic Engineering

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