Adaptive Time-Division Duplexing Slot Allocation Method for Base Stations in Beyond-5G Networks

There has been a rapid increase in application demands accompanying the development of Internet of Things technology and the proliferation of 5G networks. In 5G networks, time-division duplexing (TDD) is used to divide wireless resources into slots, which are then allocated to either uplinks or downlinks. 5G base stations currently employ fixed slot allocation for pre-configured uplinks and downlinks, making it difficult to satisfy all application demands. In beyond-5G networks, it is anticipated that the use of dynamic base station control features will enable dynamic TDD slot allocation in response to changes in the wireless environment and application requirements. Therefore, this paper verifies the effectiveness of adaptive TDD slot allocation for base stations in beyond-5G networks. A video streaming application is used to investigate the impact of adaptive TDD slot allocation on application performance. The results show that adaptive TDD slot allocation improves the average throughput of video streaming flows by more than 16% compared to that obtained with fixed slot allocation. We demonstrate that adaptive TDD slot allocation effectively maintains quality when the wireless environment and application requirements change over time.