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Impact Factor:3.436
DOI number:10.1109/LCOMM.2020.3047628
Affiliation of Author(s):School of ComputerScience and Information Engineering, Hefei University of Technology
Journal:IEEE Communications Letters
Funded by:National Natural Science Foundation of China under Grants 61971176 and 61901156, Anhui Provincial N
Key Words:CRAN, full-duplex, low latency.
Abstract:This letter proposes a novel full-duplex-enabled cooperative relay scheme to reduce the downlink delivery latency in cloud radio access networks (CRAN). Specifically, remote radio heads (RRHs) are deployed with full-duplex capability and work in Amplify-and-Forward mode so that they could receive signals from the baseband signal processing unit (BBU) and forward to the user groups immediately, which can efficiently decrease the waiting and processing delay. Beyond the proposed scheme, we move forward to jointly optimize the transmit/receive beamforming vectors of both BBU and the RRHs with the target of minimizing the maximal delivery latency among all user groups. The formulated problem is a multivariable coupling problem and difficult to solve. To deal with it, we propose an efficient successive convex approximation iterative algorithm. Simulation results show that our proposed scheme could reduce the delivery latency compared with other schemes.
Co-author:Yibo Yi,Min Peng
First Author:Caihong Kai
Indexed by:Journal paper
Correspondence Author:Wei Huang
Discipline:Engineering
Document Type:J
Volume:25
Issue:4
Page Number:1259 - 1263
ISSN No.:1558-2558
Translation or Not:no
Date of Publication:2020-12-28
Included Journals:SCI、EI