OpenRAN
Last updated
Open RAN (or O-RAN)
From the O-RAN Alliance.
Aims to define open interfaces of split RAN architecture.
Open and Virtualized RAN (vRAN).
OpenRAN.
From Telecom Infra Project.
Aims to disintegrate mobile network RAN architecture.
By having multi-vendor interoperable solutions.
Built on general purpose COTS.
Aims to speed up adoption and deployments
Uses O-RAN’s interfaces.
Works with 3GPP, ONF, ...
Avoid Vendor lock-in.
Reduce cost.
Quick time to market.
Best of breed.
Spur Innovation.
Participate in HW/SW development.
New HW and SW requirements.
Interoperability.
Complex automation.
Virtualization security.
Reliability and Availability.
High fronthaul bandwidth low-latency.
RIC → RAN Intelligent Controller.
FCAPS of O-RAN network functions.
Fault, configuration, accounting, performance and security.
RAN optimization in Non-RT (>1 second).
Enables near-time control and optimization of O-RAN nodes (10ms to 1 sec).
O-CU
Centralized Unit.
O-DU
Distributed Unit.
Here, decision latency is very important and thus has to be closer to the ran nodes.
Open Distributed Unit.
Terminates the fronthaul interface.
Logical node hosting High-PHY layers based on a lower layer functional splut.
O-RAN Central Unit.
Control Plane (CP).
User Plane (UP).
CP.
Hosts the RRC (Radio Resource Control) and the control plane part of the PDCP (Packet Data Convergence) protocol.
UP hosts the user plane part of the PDCP protocol and the SDAP (Service Data Adaptation) protocol.
O-RAN Radio Unit.
Hosts Low-PHY layers and RF processing.
The generic cloud infrastructure.
