LG Uplus and Ericsson Triple Fronthaul Reach in AI-RAN Trial

By Daniel Okafor, senior correspondent, Telecom Gazette

What did the LG Uplus-Ericsson trial achieve?

LG Uplus and Ericsson have tripled fronthaul reach in joint verification tests in South Korea, the operator disclosed this week. The operator reported a threefold extension in the distance between base station Radio Units and Data Units. The trials used Ericsson fronthaul equipment paired with network automation systems. Signal quality held steady across the longer runs.

The fronthaul link carries traffic between a radio head and its baseband unit. Operators have long constrained those links to short fibre runs. Latency budgets tighten as distance grows. Extending the range changes how densely a radio access network can be built. It matters most in low-density cells, where centralising baseband processing cuts the per-site cost, reduces the number of physical sites required and frees spectrum for wider coverage.

The verification work focused squarely on the Radio Unit to Data Unit connection, the operator clarified. That interface sits at the heart of the disaggregated 5G architecture now standard across commercial deployments.

Why does the AI-RAN angle matter?

LG Uplus framed the result as a contribution to the broader AI-RAN agenda. AI-RAN integrates artificial intelligence workloads directly into the radio access network. The concept is under active study across the equipment vendor community and several large operator groups. The operator's argument is straightforward: reconfigured existing kit can shoulder AI-RAN duties, and that keeps the capital expenditure bill down.

Lee Sang-heon, head of network advanced development at LG Uplus, said the operator would build on the fronthaul work. He added that the carrier would explore other technologies needed for "the next-generation network era." He did not name the follow-on vendors or specify the test schedule.

The operator emphasised that the demonstration shows current equipment can be repurposed for AI-RAN uses. The benefit carries clear implications for infrastructure costs. LG Uplus also stated the work would feed into a push towards autonomous networks, in which the network monitors itself, allocates resources and resolves incidents without human oversight.

How should the three-times figure be read?

The three-times reach figure deserves context. LG Uplus did not disclose the specific distances tested or the latency recorded. The operator also withheld the precise site configurations used in the verification work. That omission makes independent benchmarking difficult at this stage.

Industry analysts treat such disclosures with caution. Trials under controlled conditions routinely outperform production deployments. Interference, fibre variance and hardware ageing all enter the picture once a system leaves the lab. The three-times figure remains a lab result, not a guaranteed commercial uplift, and the operator's framing carries a vendor-friendly tone that practitioners should weigh against independent field data.

The carrier said validation work will focus on real-world network set-ups. The shift from lab to field is where marketing claims and engineering reality tend to diverge most sharply. Operators have learned to read that gap.

What comes next?

The next phase of work will examine automation technologies, according to LG Uplus. Validation will move from lab conditions into real-world set-ups. The longer-term objective is autonomous networks with minimal human intervention across every layer of the radio access stack. That ambition mirrors a wider industry push towards self-optimising radio infrastructure.

The South Korean trial provides one of the first operator-led datapoints on how far existing fronthaul kits can stretch without hardware replacement. For Ericsson, the result supports a renewal argument that the installed base still has runway. That framing offers a counterpoint to vendor pitches that frame every transition as requiring fresh equipment.

LG Uplus has not published a timeline for commercial deployment. The operator has also not disclosed investment figures tied to the programme. The next milestone will be live-network validation in subsequent phases, and the operator's commitment to publishing field results will determine how seriously the industry treats the three-times figure going forward.