Which framework related to Cloud RAN was published by the Next Generation Mobile Networks (NGMN) Alliance?

The Cloud RAN architecture framework, published by the Next Generation Mobile Networks (NGMN) Alliance, is a key reference point aimed at standardizing and guiding the deployment of Cloud RAN technologies. This framework specifically addresses the architecture and operational aspects of Cloud Radio Access Networks, which are essential for enabling the flexibility and scalability that are necessary for next-generation mobile networks.

The NGMN Alliance, composed of various stakeholders in the mobile industry, developed this framework to ensure that the evolving needs of mobile communication systems are met with a coherent and applicable architectural approach. The Cloud RAN architecture framework outlines the roles of various components in a Cloud RAN deployment, and it facilitates interoperability between different network elements, thereby fostering innovation and efficiency in network operations.

In contrast, while the other frameworks have their own significance, they do not directly relate to the specific architectural guidance for Cloud RAN. For example, the Cloud Service Framework and Cloud Network Operations Framework focus more on service-oriented architecture and operational management rather than the specific architectural layout of Cloud RAN itself. The Next Generation Network Framework, meanwhile, encompasses a broader scope, relating to multiple aspects of next-generation networks rather than being narrowly focused on Cloud RAN architecture.