Flexible RAN: Combining Dynamic Baseband Split Selection and Reconfigurable Optical Transport to Optimize RAN Performance
Journal article, 2020

The introduction of functional splits in C-RANs brings a tradeoff between radio performance and transport capacity. Higher-layer splits relax transport capacity requirements, whereas radio performance is not guaranteed. Lower-layer splits are beneficial for the radio performance, but they may require a more expensive and high capacity transport network. Facing the challenge of how to deploy 5G RANs in the short-term future, network operators need to find the best functional split options able to accommodate radio performance requirements without incurring excessive transport network costs. This article presents an architecture referred to as F-RAN able to choose the most appropriate split option while considering time-varying radio performance and the availability of transport resources. F-RAN can accommodate these needs by means of an SDNbased orchestration layer and a programmable optical transport network. The performance of F-RAN is benchmarked against a conventional C-RAN architecture in terms of the number of wavelengths and transponders to be deployed. Simulation results confirm the overall benefits of F-RAN in terms of better utilization of transport resources.

Optical network units

Electromagnetic interference

Band-pass filters

Manganese

5G mobile communication

Antennas

Author

Yajie Li

Royal Institute of Technology (KTH)

Beijing University of Posts and Telecommunications (BUPT)

Jonas Martensson

RISE Research Institutes of Sweden

Bjorn Skubic

Ericsson

Yongli Zhao

Beijing University of Posts and Telecommunications (BUPT)

Jie Zhang

Beijing University of Posts and Telecommunications (BUPT)

Lena Wosinska

Chalmers, Electrical Engineering, Communication and Antenna Systems, Optical Networks

Paolo Monti

Chalmers, Electrical Engineering, Communication and Antenna Systems, Optical Networks

IEEE Network

0890-8044 (ISSN)

Vol. 34 4 180-187

Subject Categories

Computer Engineering

Telecommunications

Communication Systems

DOI

10.1109/MNET.001.1900477

More information

Latest update

9/21/2020