Coexistence Analysis Between 5G NR and LTE Network at 1.8 GHz

With the rapid growth of 5G new radio (NR) network, efficient spectrum resource utilization is one of the current biggest challenges. To solve this problem, the operator is beginning the construction of spectrum refarming which may cause the interference issue among different services. Thus, the study on interference coexistence between 5G NR and other networks is becoming more and more significant. Based on existing communication networks, this paper presents the sharing studies with 5G NR frequency division duplexing (FDD) and LTE time division duplexing (TDD) in 1.8 GHz band. Firstly, we provide an academic method, then we use the Monte Carlo method and apply system-level simulation. Finally, we conclude that whether in co-location and non-co-location topology, based on necessary adjacent channel interference ratio (ACIR), the coexistence of 5G NR FDD and LTE TDD can be achieved in the 1.8 GHz band.