ADVANCING NETWORK PERFORMANCE FOR 5G NR UPLINK CARRIER AGGREGATION THROUGH TIMING ALIGNMENT OPTIMIZATION

Abstract

Unparalleled mobile broadband connectivity is finally here with the introduction of 5G New Radio (NR) technology. Uplink Carrier Aggregation (UL-CA), which integrates numerous uplink carrier frequencies to enable effective and high-capacity uplink communication, is a key component of this breakthrough. However, UL-CA performance optimization does not come without difficulties, especially regarding timing alignment. In order to fully benefit from the rewards of 5G NR Uplink Carrier Aggregation, temporal alignment plays a crucial role, which is explored in this study. In order to avoid interference and data loss, proper time frame alignment is necessary. Frame alignment will eventually result in greater peak data rates, more throughput, and improved dependability. Optimization of uplink carrier aggregation is becoming increasingly important as 5G networks develop to offer advanced mobile broadband (eMBB) and ultrareliable low latency communications (URLLC). Timing alignment problems are addressed by presenting two important fixes. The first approach prioritizes evaluating the multi-tag support features of User Equipment (UE) prior to activating UL-CA. This approach guarantees synchronization throughout the Random-Access Channel (RACH) process on both the Primary Cell (PCELL) and Secondary Cell (SCELL). In order to synchronize time and enhance uplink data transmission while preserving power, the second approach emphasizes introducing UL-CA to GNodeBs within a single cell group in a selective manner.