This paper presents Plaza6G, the first operational Experiment-as-a-Service (ExaS) platform unifying cloud resources with next-generation wireless infrastructure. Developed at CTTC in Barcelona, Plaza6G integrates GPU-accelerated compute clusters, multiple 5G cores, both open-source (e.g., Free5GC) and commercial (e.g., Cumucore), programmable RANs, and physical or emulated user equipment under unified orchestration. In Plaza6G, the experiment design requires minimal expertise as it is expressed in natural language via a web portal or a REST API. The web portal and REST API are enhanced with a Large Language Model (LLM)-based assistant, which employs retrieval-augmented generation (RAG) for up-to-date experiment knowledge and Low-Rank Adaptation (LoRA) for continuous domain fine-tuning. Over-the-air (OTA) trials leverage a four-chamber anechoic facility and a dual-site outdoor 5G network operating in sub-6~GHz and mmWave bands. Demonstrations include automated CI/CD integration with sub-ten-minute setup and interactive OTA testing under programmable propagation conditions. Machine-readable experiment descriptors ensure reproducibility, while future work targets policy-aware orchestration, safety validation, and federated testbed integration toward open, reproducible wireless experimentation.

翻译：本文介绍Plaza6G——首个将云资源与下一代无线基础设施统一起来的可运行实验即服务平台。该平台由巴塞罗那CTTC开发，集成了GPU加速计算集群、多个5G核心网（包括开源方案如Free5GC和商业方案如Cumucore）、可编程无线接入网，以及物理或仿真的用户设备，并通过统一编排进行管理。在Plaza6G中，实验设计可通过网页门户或REST API以自然语言表达，极大降低了对专业知识的依赖。网页门户与REST API配备了基于大语言模型的智能助手，该助手采用检索增强生成技术获取最新实验知识，并利用低秩自适应方法进行持续领域微调。空口试验依托四腔室微波暗室及双站点室外5G网络开展，支持Sub-6GHz与毫米波频段。演示案例包括十分钟内完成自动化的CI/CD集成部署，以及在可编程传播条件下进行交互式空口测试。机器可读的实验描述符确保了结果可复现性，未来工作将聚焦策略感知的编排机制、安全性验证及联邦测试平台集成，以推动开放、可复现的无线实验生态发展。