Ericsson and KDDI advance autonomous networks with AI uplink trial

Ericsson and KDDI recently concluded a significant field trial of AI-driven uplink optimization on a live commercial network in Japan, showcasing tangible performance improvements across both 4G and 5G networks. The trial involved the integration of Ericsson’s Uplink Interference Optimizer (UIO) rApp with a third-party rApp developed by FYRA, a Japanese developer, all running on the Ericsson Intelligent Automation Platform (EIAP).

This development holds particular importance for telecom operators as they transition towards autonomous networks, especially with the increasing significance of AI-based network optimization in managing escalating traffic volumes and latency-sensitive applications. For readers of eeNews Europe, the trial serves as a testament to the progression of open RAN ecosystems and the commercial deployment of third-party rApps.

AI optimization in real-world conditions

The field trial, conducted in the first quarter of 2026, spanned approximately 1,500 5G cells and 1,300 4G cells within KDDI’s operational network. Ericsson reported that the AI-driven optimization platform strategically targeted the busiest cells to enhance uplink performance while maintaining network stability.

Results from the trial indicated an average throughput improvement of 9.6% in 4G and 3.1% in 5G, despite a 10% increase in uplink traffic during the evaluation period. Additionally, Ericsson noted a 27% enhancement in 5G signal-to-interference-plus-noise ratio (SINR), coupled with improvements in modulation and spectral efficiency.

This deployment marked the inaugural global live-network implementation of Ericsson’s UIO rApp and the first utilization of EIAP in a live commercial setting in Japan.

Ericsson disclosed that the UIO rApp achieved an autonomy assessment level of 3.86 through an adapted version of the TM Forum’s ANLET methodology, bringing operators closer to Autonomous Networks Level 4.

Embracing an open ecosystem approach

Another pivotal aspect of the trial was the incorporation of a non-Ericsson application. KDDI tested the FYRA Suite rApp alongside Ericsson’s software to validate EIAP’s support for third-party applications and adherence to the O-RAN R1 standard.

Both companies emphasized that this integration showcases how open rApp platforms can foster broader telecom innovation ecosystems, enabling local developers to create applications with global scalability.

Hiroaki Ando, President and Representative Director of Ericsson Japan, emphasized the critical importance of highly reliable, low-latency uplink performance as a foundational element for Physical AI use cases, which Japan has identified as a priority in its semiconductor and digital industry strategy.

Ericsson announced the general availability of the Uplink Interference Optimizer rApp following the project, paving the way for broader operator deployments on a global scale.