Some see what Rakuten Mobile achieved with Open RAN as a special case that can’t be easily repeated, especially in brownfield deployments. Do they have a point?

Greenfield: A common conversation is that Open RAN is only applicable in completely new builds and not to existing operations or operators. We disagree with that. Open RAN is the application of new modern technologies into a business and an operation.

Brownfield: One view is to see this existing operations and operators as not what’s commonly termed a Brownfield but rather as a collection of Greenfield opportunities and existing businesses, all of those that are available for modernization. Now, do you do all of those at the same time? No, you do not.

I fully predict that some of the existing infrastructure and operations will be here in 10 or 15 years. However, we should change the ones we want to change as quickly as possible and create a new operating model and growth. So it’s a different landscape, a different business, and a different challenge. And it’s finding the right tools to meet those needs.

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Winner – Private Network Startups – Niral Networks, deploys private 5G and Edge AI network at GMR’s energy facility which faced critical connectivity and safety challenges. This air-gapped, industrial-grade solution supports plant automation, AI surveillance, and drone operations, offering high throughput, low latency, and centralized management across multiple sites.
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In a detailed conversation with Rakuten Symphony’s Geoff Hollingworth, this article explores how Rakuten Mobile’s Open RAN rollout defied industry skepticism and set a new bar for telecom transformation. With over 275,000 cells deployed and just 250 staff, Rakuten’s software-centric model shows how cloud-native, virtualized networks can scale—offering key lessons for both greenfield and brownfield operators.

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