What are DT’s learnings from open and virtualized RAN deployment at NBB, Germany?

The main learnings from DT's open and virtualized RAN deployment are related to more responsbility for operators and performance and operational evaluation.

Deutsche Telekom has deployed open and virtualized RAN solution in a live environment in Neubrandenburg, Germany. The deployment is a virtualized, multi-vendor, O-RAN-based solution with massive MIMO capability and is currently in a friendly customer trial phase.

What are DT's learnings from open and virtualized RAN deployment at NBB, Germany?

Below are the main learnings:

More Responsibility for Operator – Disaggregated RAN moves additional responsibility to the operator and it is changing the operational model. We are putting a lot of effort to define which integration and verification tasks we will need to control and which tasks we expect to be done by 3rd parties.

Performance & Operational Evaluation – In the past and today, almost all big RAN vendors put the RAN SW on a classical bare metal solution. vRAN is critical for ecosystem diversification (this is because new RAN vendors wonโ€™t develop their own bare-metal classical solutions. They, therefore, require COTS solutions i.e. vRAN). Challenge for vRAN is that we have a high workload demand (e.g. 5G mMIMO) and feature richness requirements that are important to be supported. Evaluation of system performance, as well as operational experience, was a critical learning curve for future large-scale deployment of O-RAN-based solutions.

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