Title :
Wireless energy harvesting and information processing in cooperative wireless sensor networks
Author :
Guo, Songtao ; Yang, Yang ; Yang, Yuanyuan
Author_Institution :
College of Electronic and Information Engineering, Southwest University, Chongqing 400715, China
Abstract :
This paper considers applying simultaneously wireless information and power transfer (SWIPT) technique to cooperative clustered wireless sensor networks, aiming at prolonging the lifetime of relay nodes and maximizing the energy efficiency of data transmission. To this end, we first formulate the energy-efficient cooperative transmission (eCotrans) problem for SWIPT as a non-convex optimization problem. By exploiting fractional programming and dual decomposition, we design a distributed iteration algorithm for power allocation, power splitting and relay selection to solve the non-convex optimization problem. Our simulation results illustrate that the proposed algorithm can converge within a few iterations and provide practical insights into the effect of the number of relay nodes and the maximum transmission power allowance on energy efficiency.
Keywords :
Energy harvesting; Optimization; Receivers; Relays; Resource management; Wireless communication; Wireless sensor networks; Power allocation; clustered wireless sensor networks; cooperative relaying; wireless information and power transfer;
Conference_Titel :
Communications (ICC), 2015 IEEE International Conference on
Conference_Location :
London, United Kingdom
DOI :
10.1109/ICC.2015.7249181