NTT DOCOMO and Nokia have launched what they describe as the world's first commercial multi-vendor Open RAN (O-RAN) base station deployment, marking a milestone for an architecture that operators have promoted as a way to loosen incumbent vendors' grip on radio networks.

The deployment pairs Nokia radio equipment with radio units and distributed units from other suppliers inside a live commercial network, using open, standardized interfaces rather than the proprietary links that traditionally lock an operator into a single vendor's ecosystem. DOCOMO, Japan's largest mobile operator, has positioned itself as an early O-RAN mover before, having introduced virtualized RAN elements across its 5G network in earlier phases of its rollout.

For Nokia, the commercial launch is a proof point in a market where open RAN claims have often outrun results. Vendors and operators have announced a stream of O-RAN trials, lab tests and MoUs over the past several years, but comparatively few multi-vendor deployments have reached full commercial service. The DOCOMO deployment therefore carries weight precisely because it is commercial rather than experimental: the base stations are carrying live subscriber traffic under real network conditions.

The multi-vendor claim is the operative distinction. Single-vendor open RAN, where one supplier delivers O-RAN-compliant equipment end to end, is relatively straightforward. Interoperability across vendors has been the harder problem, requiring the O-RAN Alliance's open interfaces to work reliably between radio units, distributed units and centralized units sourced from different manufacturers. The Japanese deployment demonstrates that such interoperability can hold up in a production network at scale.

The commercial significance for DOCOMO lies in procurement flexibility. An open, disaggregated RAN gives the operator a broader supplier pool and the ability to mix and match components, potentially increasing price competition and reducing dependence on any single infrastructure vendor — a consideration that has gained urgency in markets weighing geopolitical pressure on certain equipment suppliers. Japan, alongside the United States, has been among the more aggressive markets in pushing network openness for this reason.

DOCOMO has also been an active contributor to O-RAN standardization, and the deployment reflects specifications mature enough to support commercial operation rather than lab-grade interoperability demonstrations.

Nokia's role in the deployment underscores its strategy of embracing openness while remaining a major end-to-end vendor. The Finnish vendor has committed to O-RAN-compliant interfaces across its portfolio and has secured open RAN business with operators including those in markets where rivals face restrictions.

The gap between vendor marketing and commercial reality has been the central tension in open RAN's story so far. Operators in Europe, in particular, have been slower to commit, citing integration costs and performance concerns even as regulators encourage diversification of suppliers. A live multi-vendor deployment at DOCOMO gives the O-RAN camp its clearest evidence yet that the architecture can move from whitepaper to operating network without sacrificing commercial viability.

Whether the model transfers to other markets depends on factors DOCOMO's deployment does not resolve on its own: the depth of systems integration capability available to each operator, the willingness of vendors to support rival equipment in their deployments, and the unit economics of disaggregated networks versus integrated ones. Operators and vendors backing O-RAN will look to replicate the Japanese deployment pattern across additional markets and spectrum bands as the specifications and product ecosystem mature.