Energy-Efficient Full-Duplex Enabled Cloud Radio Access Networks

Tung Thanh VU  Duy Trong NGO  Minh N. DAO  Quang-Thang DUONG  Minoru OKADA  Hung NGUYEN-LE  Richard H. MIDDLETON  

Publication
IEICE TRANSACTIONS on Communications   Vol.E103-B   No.1   pp.71-78
Publication Date: 2020/01/01
Online ISSN: 1745-1345
DOI: 10.1587/transcom.2018EBP3327
Type of Manuscript: PAPER
Category: Wireless Communication Technologies
Keyword: 
C-RAN,  energy efficiency,  full duplex,  precoding design,  power allocation,  self-interference cancellation,  

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Summary: 
This paper studies the joint optimization of precoding, transmit power and data rate allocation for energy-efficient full-duplex (FD) cloud radio access networks (C-RANs). A new nonconvex problem is formulated, where the ratio of total sum rate to total power consumption is maximized, subject to the maximum transmit powers of remote radio heads and uplink users. An iterative algorithm based on successive convex programming is proposed with guaranteed convergence to the Karush-Kuhn-Tucker solutions of the formulated problem. Numerical examples confirm the effectiveness of the proposed algorithm and show that the FD C-RANs can achieve a large gain over half-duplex C-RANs in terms of energy efficiency at low self-interference power levels.