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

Author

Lan Tang ; Xinggan Zhang ; Xiaodong Wang

Author_Institution

Dept. of Electron. Sci. & Eng., Nanjing Univ., Nanjing, China

Volume

18

Issue

11

fYear

2014

fDate

Nov. 2014

Firstpage

2015

Lastpage

2018

Abstract

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.

Keywords

decode and forward communication; inductive power transmission; linear programming; radiofrequency power transmission; relay networks (telecommunication); WET; causality constraints; energy arrivals; energy transmission; energy-constrained wireless network; harvest-then-decode and forward policy; joint data transmission; linear programming; multiple relay nodes; optimal transmission scheme; optimal transmission time allocation; source node; system parameters; transmission time minimization; two-hop communication system; two-hop network; wireless energy transfer; Energy exchange; Energy harvesting; Receivers; Relays; Resource management; Throughput; Wireless communication; Cooperative relay; Wireless energy transfer; Wireless energy transfer (WET); cooperative relay;

fLanguage

English

Journal_Title

Communications Letters, IEEE

Publisher

ieee

ISSN

1089-7798

Type

jour

DOI

10.1109/LCOMM.2014.2360203

Filename

6910214