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Hybrid Scheduling/Signal-Level Coordination in the Downlink of Multi-Cloud Radio-Access Networks

Douik, Ahmed and Dahrouj, Hayssam and Al-Naffouri, Tareq Y. and Alouini, Mohamed-Slim (2015) Hybrid Scheduling/Signal-Level Coordination in the Downlink of Multi-Cloud Radio-Access Networks. In: IEEE Global Communications Conference (GLOBECOM), 2015. IEEE , Piscataway, NJ, pp. 1-6. ISBN 978-1-4799-5952-5.

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In the context of resource allocation in cloud- radio access networks, recent studies assume either signal-level or scheduling-level coordination. This paper, instead, considers a hybrid level of coordination for the scheduling problem in the downlink of a multi-cloud radio- access network, so as to benefit from both scheduling policies. Consider a multi-cloud radio access network, where each cloud is connected to several base-stations (BSs) via high capacity links, and therefore allows joint signal processing between them. Across the multiple clouds, however, only scheduling-level coordination is permitted, as it requires a lower level of backhaul communication. The frame structure of every BS is composed of various time/frequency blocks, called power- zones (PZs), and kept at fixed power level. The paper addresses the problem of maximizing a network-wide utility by associating users to clouds and scheduling them to the PZs, under the practical constraints that each user is scheduled, at most, to a single cloud, but possibly to many BSs within the cloud, and can be served by one or more distinct PZs within the BSs' frame. The paper solves the problem using graph theory techniques by constructing the conflict graph. The scheduling problem is, then, shown to be equivalent to a maximum- weight independent set problem in the constructed graph, in which each vertex symbolizes an association of cloud, user, BS and PZ, with a weight representing the utility of that association. Simulation results suggest that the proposed hybrid scheduling strategy provides appreciable gain as compared to the scheduling-level coordinated networks, with a negligible degradation to signal-level coordination.

Item Type:Book Section
Related URLs:
URLURL TypeDescription
Douik, Ahmed0000-0001-7791-9443
Dahrouj, Hayssam0000-0002-0737-6372
Al-Naffouri, Tareq Y.0000-0001-6955-4720
Alouini, Mohamed-Slim0000-0003-4827-1793
Additional Information:© 2015 IEEE. Hayssam Dahrouj would like to thank Effat University in Jeddah Saudi Arabia, for funding the research reported in this paper through the Research and Consultancy Institute. The work of M.-S. Alouini was supported by the Qatar National Research Fund (a member of Qatar Foundation) under NPRP Grant NPRP 5-250-2-087. The statements made herein are solely the responsibility of the authors. The authors would like to acknowledge the support provided by King Fahd University of Petroleum and Minerals (KFUPM) and King Abdullah University of Science and Technology (KAUST) for funding this work through the Research Institute project number EE002355.
Funding AgencyGrant Number
Effat UniversityUNSPECIFIED
Qatar National Research FundNPRP 5-250-2-087
King Fahd University of Petroleum and Minerals (KFUPM)UNSPECIFIED
King Abdullah University of Science and Technology (KAUST)EE002355
Subject Keywords:Multi-cloud networks, coordinated scheduling, scheduling-level coordination, signal-level coordination, maximum-weight independent set problem
Record Number:CaltechAUTHORS:20161128-110115405
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Official Citation:A. Douik, H. Dahrouj, T. Y. Al-Naffouri and M. S. Alouini, "Hybrid Scheduling/Signal-Level Coordination in the Downlink of Multi-Cloud Radio-Access Networks," 2015 IEEE Global Communications Conference (GLOBECOM), San Diego, CA, 2015, pp. 1-6. doi: 10.1109/GLOCOM.2015.7417578
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:72309
Deposited By: Ruth Sustaita
Deposited On:28 Nov 2016 19:12
Last Modified:09 Mar 2020 13:18

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