Energy efficient and distributed resource allocation for wireless powered OFDMA multi-cell networks
Chang, Z., Wang, Z., Guo, X., Han, Z., & Ristaniemi, T. (2017). Energy efficient and distributed resource allocation for wireless powered OFDMA multi-cell networks. In WiOpt 2017 : 15th International Symposium on Modeling and Optimization in Mobile, Ad Hoc, and Wireless Networks. IEEE. doi:10.23919/WIOPT.2017.7959941
Date
2017Discipline
TietotekniikkaCopyright
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In this paper, we investigate the energy efficient
resource allocation problem for the wireless powered OFDMA
multi-cell networks. In the considered system, the users who
have data to transmit in the uplink can only be empowered
by the wireless power obtained from multiple base stations (BSs)
with a large scale of multiple antennas in the downlink. A time
division protocol is considered to divide the time of wireless power
transfer (WPT) in the downlink and wireless information transfer
(WIT) in the uplink into separate time slot. With the objective
to improve the energy efficiency (EE) of the system, we propose
the antenna selection, time allocation, subcarrier and power
allocation schemes. Due to the non-convexity of the formulated
optimization problem, we first apply the nonlinear programming
scheme to convert it to a convex optimization problem and
then address it through an efficient alternating direction method
of multipliers based distributed resource allocation
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