An Amplify-and-Forward Full-Duplex Cooperative Relay Scheme for Low-Latency Downlink Transmission in CRAN
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影响因子：3.436
DOI码：10.1109/LCOMM.2020.3047628
所属单位：School of ComputerScience and Information Engineering, Hefei University of Technology
发表刊物：IEEE Communications Letters
项目来源：National Natural Science Foundation of China under Grants 61971176 and 61901156, Anhui Provincial N
关键字：CRAN, full-duplex, low latency.
摘要：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.
合写作者：Yibo Yi,Min Peng
第一作者：Caihong Kai
论文类型：期刊论文
通讯作者：Wei Huang
学科门类：工学
文献类型：J
卷号：25
期号：4
页面范围：1259 - 1263
ISSN号：1558-2558
是否译文：否
发表时间：2020-12-28
收录刊物：SCI、EI