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Joint allocation of radio and optical resources in virtualized cloud RAN with CoMP
KTH, School of Information and Communication Technology (ICT), Communication Systems, CoS, Radio Systems Laboratory (RS Lab).ORCID iD: 0000-0003-0525-4491
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2017 (English)In: 2016 IEEE Global Communications Conference, GLOBECOM 2016 - Proceedings, Institute of Electrical and Electronics Engineers (IEEE), 2017, 7841923Conference paper (Refereed)
Abstract [en]

5G Radio Access Networks (RANs) are supposed to increase their capacity by 1000x to handle growing number of connected devices and increasing data rates. The concept of cloud-RAN (CRAN) has been recently proposed to decouple digital units (DUs) and radio units (RUs) of base stations (BSs), and centralize DUs into central offices. CRAN can ease the implementation of advanced radio coordination techniques, e.g., Coordinated Multi-Point (CoMP) Transmission/Reception, to enhance its system throughput. However, separating DUs and RUs, and implementing CoMP in CRAN require low-latency and high-bandwidth connectivity links, called "fronthaul". Today, consensus has not yet been achieved on how BSs, fronthaul, and central offices will be orchestrated to enhance the system throughput. In this study, we present a CRAN over Passive Optical Network (PON) architecture called virtualized-CRAN (V-CRAN). V-CRAN leverages the concept of virtualized PON (VPON) that can dynamically associate any RU to any DU so that several RUs can be coordinated by the same DU, and the concept of virtualized BS (V-BS) that can jointly transmit common signals from multiple RUs to a user. We propose a novel mathematical model based on constraint programming for joint allocation of radio, optical network, and baseband processing resources to enhance RAN throughput, and we solve it by optimally forming VPONs and V-BSs. Comprehensive simulations show that V-CRAN can enhance the system throughput and the efficiency of resource utilization.

Place, publisher, year, edition, pages
Institute of Electrical and Electronics Engineers (IEEE), 2017. 7841923
Series
IEEE Global Communications Conference, ISSN 2334-0983
Keyword [en]
Coordinated Multi-Point, CRAN, Throughput Enhancement, TWDM-PON, Virtualization
National Category
Communication Systems
Identifiers
URN: urn:nbn:se:kth:diva-208133DOI: 10.1109/GLOCOM.2016.7841923ISI: 000401963302116ScopusID: 2-s2.0-85015363303ISBN: 9781509013289 (print)OAI: oai:DiVA.org:kth-208133DiVA: diva2:1107329
Conference
59th IEEE Global Communications Conference, GLOBECOM 2016, Washington, United States, 4 December 2016 through 8 December 2016
Note

QC 20170609

Available from: 2017-06-09 Created: 2017-06-09 Last updated: 2017-06-20Bibliographically approved

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CiteExportLink to record
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Citation style
  • apa
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