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Conference Paper Joint Allocation of Radio and Optical Resources in Virtualized Cloud RAN with CoMP
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Authors
Xinbo Wang, Cicek Cavdar, Lin Wang, Massimo Tornatore, Yongli Zhao, Hwan Seok Chung, Han Hyub Lee, Soomyung Park, Biswanath Mukherjee
Issue Date
2016-12
Citation
Global Communications Conference (GLOBECOM) 2016, pp.1-6
Language
English
Type
Conference Paper
DOI
https://dx.doi.org/10.1109/GLOCOM.2016.7841923
Project Code
16MH1100, SDN based Wired and wireless converged optical Access Networking, Chung Hwan Seok
Abstract
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.
KSP Keywords
5G radio access, Cloud-RAN(C-RAN), Coordination Techniques, High bandwidth, Joint allocation, Low latency, Mathematical model, Passive optical network (pon), Radio Access Network, base station(BS), baseband processing