Joint Data and Energy Transmission in a Two-Hop Network With Multiple Relays

Wireless energy transfer (WET) is a promising technique to prolong the lifetime of an energy-constrained wireless network. In this paper, we consider a two-hop communication system with multiple relay nodes powered by WET. To minimize the transmission time, we propose an optimal transmission scheme,...

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Bibliographic Details
Published in:IEEE communications letters 2014-11, Vol.18 (11), p.2015-2018
Main Authors: Tang, Lan, Zhang, Xinggan, Wang, Xiaodong
Format: Article
Language:English
Subjects:
Cooperative relay
Energy exchange
Energy harvesting
Receivers
Relays
Resource management
Throughput
Wireless communication
Wireless energy transfer
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Summary:Wireless energy transfer (WET) is a promising technique to prolong the lifetime of an energy-constrained wireless network. In this paper, we consider a two-hop communication system with multiple relay nodes powered by WET. To minimize the transmission time, we propose an optimal transmission scheme, in which the relay nodes adopt a "harvest-then-decode and forward" policy. The optimal transmission time allocation of the source and each relay node is calculated by a linear program under causality constraints on both data and energy arrivals. The analytical and simulation results reveal the relationship between the optimal time allocation and system parameters.
ISSN:1089-7798
1558-2558
DOI:10.1109/LCOMM.2014.2360203