CU/DU/RU placement in commercial networks

Hi all,

I am trying to shed some light on which RAN deployment model is used by commercial operators.

The questions I am especially interested on are:

  • How many RUs are typically served by a single DU?
  • Is a DU is typically co-located with the RUs its serving? Does this change in urban or rural environments?
  • How many DUs are typically served by a single CU?
  • What is the topology of the midhaul network (from CU to DU), are links typically redundant?

I am attaching a figure I found in ORAN-WG9.XPSAAS.0-R005-v10.00.