A Flexibility Metric and Optimization Methods for Mixed Numerologies in 5G and beyond


IEEE Access, vol.6, pp.3755-3764, 2018 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 6
  • Publication Date: 2018
  • Doi Number: 10.1109/access.2018.2795752
  • Journal Name: IEEE Access
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Page Numbers: pp.3755-3764
  • Keywords: Adaptive scheduling, communication effectiveness, context awareness, OFDM, resource management, user centered design
  • Istanbul Medipol University Affiliated: Yes


Mixed numerology-based frame structures will be a part of 5G systems in order to enhance overall flexibility and user satisfaction. However, inter-numerology interference, spectral efficiency reduction, complexity, and signaling overhead type of issues arise in such structures. It is needed to limit the number of numerologies used together. In this paper, a novel heuristic method is developed to find the efficient number of mixed numerologies. The proposed method aims to control overheads in systems using multi-numerology structures. Analysis of the trade-offs and relationships between different services and user requirements are also presented. The designed algorithm employs a new flexibility function and performance metric. Simulation results are shown for three different numerology sets, which include 5G numerologies.