DocumentCode :
3604653
Title :
Energy Harvesting Networks With Energy Cooperation: Procrastinating Policies
Author :
Tutuncuoglu, Kaya ; Yener, Aylin
Author_Institution :
Dept. of Electr. Eng., Pennsylvania State Univ., University Park, PA, USA
Volume :
63
Issue :
11
fYear :
2015
Firstpage :
4525
Lastpage :
4538
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.
Keywords :
energy harvesting; multi-access systems; multiterminal networks; multiuser channels; telecommunication power management; aggregate energy arrival; bidirectional energy cooperation; energy cooperation; energy harvesting network; energy harvesting transmitter node; energy transfer policy; joint optimization problem; multiple access channel; multiterminal network; optimal transmit power; procrastinating policy; sum-throughput maximization; two-hop channel; wireless energy transfer; Batteries; Energy exchange; Energy harvesting; Optimization; Resource management; Transmitters; Wireless communication; Energy harvesting networks; energy cooperation; finite energy storage; multiple access channel; procrastinating power policies; two-hop network; two-way channel;
fLanguage :
English
Journal_Title :
Communications, IEEE Transactions on
Publisher :
ieee
ISSN :
0090-6778
Type :
jour
DOI :
10.1109/TCOMM.2015.2469692
Filename :
7208807
Link To Document :
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