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Resource allocation for uplink OFDMA C-RANs with limited computation and fronthaul capacity
Ha, Vu Nguyen; Le, Long Bao
2016In 2016 IEEE International Conference on Communications (ICC) proceedings
Peer reviewed
 

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Keywords :
uplink OFDMA C-RAN; limited computation and fronthaul capacity; system sum rate maximization
Abstract :
[en] This paper considers the joint fronthaul resource and rate allocation for the OFDMA uplink cloud radio access networks (C-RANs). This amounts to determine users' transmission rates and quantization bit allocation for I/Q baseband signals, which must be transferred from remote radio heads (RRHs) to the cloud over the capacity-limited fronthaul network. Our design aims at maximizing the system sum rate through optimal allocation of fronthaul capacity and cloud computation resources. Toward this end, we propose a novel two-stage approach to solve the underlying non-linear integer problem. In the first stage, we relax the integer variables to attain a relaxed problem, which is solved by employing a pricing-based method. Interestingly, we show that the pricing-based problem is convex with respect to each optimization variable, which can be, therefore, solved efficiently. In addition, we develop a novel mechanism to iteratively update the pricing parameter which is proved to converge. In the second stage, we propose two different rounding strategies, which are applied to the obtained continuous solution of the relaxed problem to achieve a feasible solution for the original problem. Finally, we present numerical results to demonstrate the significant sum-rate gains of our proposed design with respect to a standard greedy algorithm.
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
External co-authors :
yes
Language :
English
Title :
Resource allocation for uplink OFDMA C-RANs with limited computation and fronthaul capacity
Publication date :
22 May 2016
Event name :
2016 IEEE International Conference on Communications (ICC)
Event date :
from 22-05-2016 to 27-05-2016
Main work title :
2016 IEEE International Conference on Communications (ICC) proceedings
Publisher :
IEEE, Kuala Lumpur, Malaysia
ISBN/EAN :
978-1-4799-6664-6
Peer reviewed :
Peer reviewed
Focus Area :
Security, Reliability and Trust
Available on ORBilu :
since 12 May 2021

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