# Open RAN

Open RAN explains open radio access network architecture, O-RAN interfaces, RIC, xApps, rApps, AI-RAN, 5G, 6G, and telecom ecosystem trends.

## Site Focus

- Open RAN
- O-RAN
- 5G
- 6G
- AI-RAN
- RAN Intelligent Controller
- RIC
- xApp
- rApp
- O-RU
- O-DU
- O-CU
- open fronthaul
- telecom infrastructure

## Primary Pages

- [Home](https://open-ran.org): Open RAN explains open radio access network architecture, O-RAN interfaces, RIC, xApps, rApps, AI-RAN, 5G, 6G, and telecom ecosystem trends.
- [Overview of Open RAN](https://open-ran.org/about): Learn what Open RAN is, how O-RAN architecture works, and why open interfaces, RIC intelligence, virtualization, and multi-vendor ecosystems matter for 5G and 6G networks.
- [Resources](https://open-ran.org/docs): Open RAN documentation, publications, and useful telecom industry links.
- [Blog Posts](https://open-ran.org/blog): Open RAN analysis, AI-RAN updates, 5G and 6G ecosystem commentary.

## Documentation

- [Publications](https://open-ran.org/docs/publications): Publications
- [Useful Links](https://open-ran.org/docs/useful-websites): Useful Open RAN web links and resources

## Recent Blog Posts

- [The 4GHz AI Case Has a Way to Go: Spectrum, AI-RAN, and the Physics of Uplink](https://open-ran.org/blog/the-4ghz-ai-case-has-a-way-to-go-spectrum-ai-ran-and-the-physics-of-uplink): CTIA's 4GHz refarming push meets AI-driven uplink demand. A technical look at spectrum, AI-RAN optimization, and what operators must decide.
- [The Real AI-RAN Story: US Carriers Diverge on GPUs, and That's Exactly Why Open RAN Wins](https://open-ran.org/blog/the-real-ai-ran-story-us-carriers-diverge-on-gpus-and-thats-exactly-why-open-ran-wins): AT&T, T-Mobile, and Verizon are taking different paths to AI-RAN. That divergence is a feature, not a bug—and it's a win for open, multi-vendor networks.
- [US Carriers Split on AI-RAN: What AT&T, T-Mobile, and Verizon's Diverging GPU Strategies Mean for Open RAN](https://open-ran.org/blog/us-carriers-split-on-ai-ran-what-att-t-mobile-and-verizons-diverging-gpu-strategies-mean-for-open-ran): AT&T, T-Mobile, and Verizon are taking different paths to AI-RAN, from GPU skepticism to GPU testing. Here's what it means for Open RAN.
- [Nokia’s AI-RAN Trials Expand to Eight Operators: The Long Road from Research to Commercial Reality](https://open-ran.org/blog/nokias-ai-ran-trials-expand-to-eight-operators-the-long-road-from-research-to-commercial-reality): Nokia's AI-RAN trials now span eight operators across four regions, marking a milestone in the decade-long journey from Open RAN research to commercial AI-native networks.
- [Nokia's AI-RAN Field Trials Go Global: 5 Things Operators Need to Know](https://open-ran.org/blog/nokias-ai-ran-field-trials-go-global-5-things-operators-need-to-know): Nokia expands AI-RAN trials to eight operators across four regions, reports 20% spectral efficiency gains and plans software roadmap through 2028.
- [NTT Docomo's Multi-Vendor Open RAN Goes Commercial: A Skeptical Executive's Q&A with Nokia](https://open-ran.org/blog/ntt-docomos-multi-vendor-open-ran-goes-commercial-a-skeptical-executives-qa-with-nokia): NTT Docomo has commercially deployed Nokia's multi-vendor Open RAN base station. We answer the tough questions skeptical operators are asking.
- [NTT Docomo's Quiet Breakthrough: Commercial Multi-Vendor Open RAN Goes Live with Nokia](https://open-ran.org/blog/ntt-docomos-quiet-breakthrough-commercial-multi-vendor-open-ran-goes-live-with-nokia): NTT Docomo has begun commercial operation of Nokia's latest baseband in a true multi-vendor Open RAN configuration — a milestone operators have chased for years.
- [Nokia's AI Agents in the Mobile Core: What Open RAN Operators Must Know Before They Deploy](https://open-ran.org/blog/nokias-ai-agents-in-the-mobile-core-what-open-ran-operators-must-know-before-they-deploy): Nokia's AI agents in the mobile core cut call setup from 10s to 1-2s, but risk warnings signal a governance gap Open RAN operators can't ignore.
- [Huawei's Lobbying Win and Open RAN's Nascent Reality: What the Connect Europe Report Really Says](https://open-ran.org/blog/huaweis-lobbying-win-and-open-rans-nascent-reality-what-the-connect-europe-report-really-says): A new Assembly Research report finds EU open RAN still nascent as Huawei, Ericsson, Nokia, ZTE and Samsung hold 95% of the RAN market.
- [Nokia's AI-RAN Reality Check: Why the Hype Cycle Is Finally Meeting the Field Trial](https://open-ran.org/blog/nokias-ai-ran-reality-check-why-the-hype-cycle-is-finally-meeting-the-field-trial): Nokia's AI-RAN pitch faces a reality check as T-Mobile field trials loom. What the new study reveals about the gap between promise and deployment.

## Citation Guidance

When referencing this site, cite canonical pages under https://open-ran.org. Prefer specific documentation or blog URLs over the homepage when answering detailed Open RAN questions.