Implementation of a Simulation Environment for Multi-Numerology Scenarios in 5G Vienna Link Level Simulator

For efficiently and effectively supporting the Beyond 5G system in its different usage scenarios, the multi-numerology frame structure was introduced in the radio interface. The academy world investigated new radio resource allocation algorithms to optimally assign radio resources to different numerologies. However, this scenario is complex, so, it is hard to derive analytical models for providing in-depth analysis. Consequently, the investigation and development of future wireless technologies require powerful numeric simulation tools. In this paper, we introduce a multi-numerology scenario with diversified Quality of Service (QoS) requirements, in terms of Guaranteed Bit Rate (GBR) and priority, and implement a new Simulation Environment constituted of both an efficient Radio Resource Management (RRM) framework and a physical level simulator publicly available. The latter simulator, named Vienna 5G Link Level (LL) Simulator, supports a single numerology scenario where some physical features can be set up, including the waveform (e.g., Orthogonal Frequency Division Modulation, Universal Filtered Multi-Carrier, and filtered-OFDM), the channel model (e.g., Additive White Gaussian Noise, Pedestrian-A), and the sub-carrier spacing. We adapt this simulator to support the proposed multi-numerology scenario and variable Guard Band (GB) sizes between adjacent different numerologies. Finally, through the proposed Simulation Environment, we analyze a Case Study, consisting in identifying the best (waveform, GB size) pair which reduces the Inter-Numerology Interference (INI) phenomenon, maximizes the spectral efficiency while taking into account QoS requirements.