Investigation of Performance of Uplink Multi-Panel Transmission for Multi-TRP Operation in 5G-Advanced System

This paper investigates performance of uplink multi-panel transmission for multi-TRP (transmission and reception point) operation in 5G-Advanced system to improve transmission performance by alleviating impacts on blockage under millimeter wave (mmWave) environments. In the third generation partnership project (3GPP), 5G NR (New radio) has been standardized and its enhancement called 5G-Advanced is being discussed, and radio interfaces and protocols for mmWave have been specified. In 3GPP release 18 (Rel-18), which is the first release of 5G-Advanced, multi-panel transmission was specified to improve the uplink transmission performance of mmWave communication by coordination of multiple TRPs and simultaneous transmission from multiple antenna panels equipped by each user equipment (UE). In this paper, we evaluate the transmission performances of uplink single frequency network (SFN) based 2-panel transmission under environment where blockage(s) exist in multi-TRP operation by computer simulation. Computer simulation confirms that the multi-panel transmission on the multi-TRP operation improves the degradation ratio on the 5 %ile UE throughput from 25.5 % to 11.9 %.