Uplink Tx Switching Application Optimization Based on XGBoost Algorithm

Paper in proceeding, 2023

Uplink Tx Switching is an important technology in multi-frequency cooperation, which can effectively improve the uplink capacity of the network by switching the uplink transmitting antenna of the terminal to realize the time-division uplink transmission of two carriers. The paper analyzes the technical principle and implementation of Uplink Tx Switching and compares the characteristics of SUL-based and UL CA-based schemes. Then it introduces an intelligent scheme to turn on Uplink Tx Switching when uplink capacity enhancement is required. The paper uses XGBoost Model to predict the uplink PRB utilization of the serving carriers when the uplink PRB utilization of the serving carrier is higher than the threshold, the target station turns on Uplink Tx Switching while the secondary carrier selection is also based on the uplink PRB utilization of the candidate carriers. Finally, the validity of XGBoost prediction is verified by the actual operation data in Hangzhou.