Minimum rate maximization for wireless powered cloud radio access networks

Jaein Kim; Hoon Lee; Seok Hwan Park; Inkyu Lee

doi:10.1109/TVT.2018.2881969

Minimum rate maximization for wireless powered cloud radio access networks

Jaein Kim, Hoon Lee, Seok Hwan Park, Inkyu Lee

School of Electrical Engineering

Research output: Contribution to journal › Article › peer-review

12 Citations (Scopus)

Abstract

This paper studies the optimization of signal processing strategies for downlink and uplink of a cloud radio access network (C-RAN) that serves wireless powered users with non-linear energy harvesting (EH) circuits. On the downlink, a baseband processing unit (BBU) sends radio frequency signals to the users through a set of remote radio heads (RRHs), which is centrally managed by the BBU via finite-fronthaul links. Then, each user splits the received signal for information decoding and EH by utilizing the power splitting circuit. By using the harvested energy, each user communicates with the BBU via the RRHs on the uplink. In this paper, we tackle a problem of maximizing the minimum uplink rate of the users subject to the minimum downlink rate constraint as well as the per-node transmit power and fronthaul capacity constraints. To overcome the non-convexity of the problem, we propose an iterative algorithm based on a successive convex approximation method, which obtains a locally optimal solution. Numerical results confirm the effectiveness of the proposed techniques for C-RAN systems with battery-limited users.

Original language	English
Article number	8540005
Pages (from-to)	1045-1049
Number of pages	5
Journal	IEEE Transactions on Vehicular Technology
Volume	68
Issue number	1
DOIs	https://doi.org/10.1109/TVT.2018.2881969
Publication status	Published - 2019 Jan

Bibliographical note

Funding Information:
Manuscript received December 26, 2017; revised May 8, 2018 and October 15, 2018; accepted November 13, 2018. Date of publication November 19, 2018; date of current version January 15, 2019. This work was supported by the National Research Foundation (NRF) through the Ministry of Science, ICT and Future Planning, Korean Government, under Grant 2017R1A2B3012316. The review of this paper was coordinated by Dr. H. Zhu. (Corresponding author: Inkyu Lee.) J. Kim and I. Lee are with the School of Electrical Engineering, Korea University, Seoul 02841, South Korea (e-mail:, kji_07@korea.ac.kr; inkyu@ korea.ac.kr).

Publisher Copyright:
© 1967-2012 IEEE.

Keywords

C-RAN
multiple antenna techniques
wireless power transfer

ASJC Scopus subject areas

Automotive Engineering
Aerospace Engineering
Electrical and Electronic Engineering
Applied Mathematics

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10.1109/TVT.2018.2881969

Cite this

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title = "Minimum rate maximization for wireless powered cloud radio access networks",

abstract = "This paper studies the optimization of signal processing strategies for downlink and uplink of a cloud radio access network (C-RAN) that serves wireless powered users with non-linear energy harvesting (EH) circuits. On the downlink, a baseband processing unit (BBU) sends radio frequency signals to the users through a set of remote radio heads (RRHs), which is centrally managed by the BBU via finite-fronthaul links. Then, each user splits the received signal for information decoding and EH by utilizing the power splitting circuit. By using the harvested energy, each user communicates with the BBU via the RRHs on the uplink. In this paper, we tackle a problem of maximizing the minimum uplink rate of the users subject to the minimum downlink rate constraint as well as the per-node transmit power and fronthaul capacity constraints. To overcome the non-convexity of the problem, we propose an iterative algorithm based on a successive convex approximation method, which obtains a locally optimal solution. Numerical results confirm the effectiveness of the proposed techniques for C-RAN systems with battery-limited users.",

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author = "Jaein Kim and Hoon Lee and Park, {Seok Hwan} and Inkyu Lee",

note = "Funding Information: Manuscript received December 26, 2017; revised May 8, 2018 and October 15, 2018; accepted November 13, 2018. Date of publication November 19, 2018; date of current version January 15, 2019. This work was supported by the National Research Foundation (NRF) through the Ministry of Science, ICT and Future Planning, Korean Government, under Grant 2017R1A2B3012316. The review of this paper was coordinated by Dr. H. Zhu. (Corresponding author: Inkyu Lee.) J. Kim and I. Lee are with the School of Electrical Engineering, Korea University, Seoul 02841, South Korea (e-mail:, kji_07@korea.ac.kr; inkyu@ korea.ac.kr). Publisher Copyright: {\textcopyright} 1967-2012 IEEE.",

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Minimum rate maximization for wireless powered cloud radio access networks

Abstract

Bibliographical note

Keywords

ASJC Scopus subject areas

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