Mobile World Congress 2018 saw a clutch of announcements on the Open RAN, from vendors and operators. But who is really committed to opening up the RAN, when, and why? Keith Dyer was there to ask the questions. What is an Open RAN? The concept of open goes beyond just standards interoperability. A RAN built by Nokia, Ericsson or Huawei will be interoperable with any device, any core, any transmission network attaching to it – due to its conformance with standards. That is a standards-based network.