Dynamic Spectrum Assignment Techniques based on Power Awareness for 6G Wireless Systems

In this article, dynamic spectrum assignment techniques based on power awareness are proposed which aim to achieve high spectrum utilization by allocating experimental licensed 95 GHz Tera-Hertz spectrum to primary mobile service providers (p-MSPs) of India. The proposed techniques (i) consider cognitive radio enabled spectrum assignment (SA) methods viz., interweave SA (IW-SA) and underlay SA (UL-SA) individually, and the combined IW-UL-SA, (ii) evaluate the optimal spectrum amount needed by every p-MSP, and (iii) use p-MSPs to control the small-cells (SCs) transmission power in buildings/homes of every MSP in India. Results show that (i) the proposed methods outperform the static spectrum assignment (SSA) method, (ii) IW-UL-SA outperforms IW-SA and UL-SA irrespective of the considered performance metric, and (iii) the proposed techniques meet the spectrum-efficiency and energy-efficiency needs of the 6G wireless systems since compared to SSA, IW-UL-SA, IW-SA, and UL-SA use approximately 16.66%, 33.33%, and 33.33% lesser number of buildings/homes of the SCs, respectively.