Article (Scientific journals)
Coordinated Multipoint Transmission Design for Cloud-RANs With Limited Fronthaul Capacity Constraints
HA, Vu Nguyen; Le, Long Bao; Dao, Ngoc-Dung
2016In IEEE Transactions on Vehicular Technology, 65 (9), p. 7432 - 7447
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Keywords :
Cloud radio access network (Cloud-RAN); limited fronthaul capacity; precoding and resource allocation
Abstract :
[en] In this paper, we consider the coordinated multipoint (CoMP) transmission design for the downlink cloud radio access network (Cloud-RAN). Our design aims to optimize the set of remote radio heads (RRHs) serving each user and the precoding and transmission power to minimize the total transmission power while maintaining the fronthaul capacity and users' quality-of-service (QoS) constraints. The fronthaul capacity constraint involves a nonconvex and discontinuous function that renders the optimal exhaustive search method unaffordable for large networks. To address this challenge, we propose two low-complexity algorithms. The first pricing-based algorithm solves the underlying problem through iteratively tackling a related pricing problem while appropriately updating the pricing parameter. In the second iterative linear-relaxed algorithm, we directly address the fronthaul constraint function by iteratively approximating it with a suitable linear form using a conjugate function and solving the corresponding convex problem. For performance evaluation, we also compare our proposed algorithms with two existing algorithms in the literature. Finally, extensive numerical results are presented, which illustrate the convergence of our proposed algorithms and confirm that our algorithms significantly outperform the state-of-the-art existing algorithms.
Disciplines :
Electrical & electronics engineering
Author, co-author :
HA, Vu Nguyen  ;  University of Luxembourg > Interdisciplinary Centre for Security, Reliability and Trust (SNT) > SigCom
Le, Long Bao
Dao, Ngoc-Dung
External co-authors :
yes
Language :
English
Title :
Coordinated Multipoint Transmission Design for Cloud-RANs With Limited Fronthaul Capacity Constraints
Publication date :
01 September 2016
Journal title :
IEEE Transactions on Vehicular Technology
ISSN :
0018-9545
Publisher :
Institute of Electrical and Electronics Engineers, United States
Volume :
65
Issue :
9
Pages :
7432 - 7447
Peer reviewed :
Peer Reviewed verified by ORBi
Focus Area :
Security, Reliability and Trust
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