xRAN Fronthaul Specification Version 1.0

The xRAN Fronthaul Specification document specifies the control plane, user plane and synchronization plane protocols used over the fronthaul interface linking the lls-CU (lower-layer split Central Unit) with the RU (Radio Unit) with a Lower Layer Functional Split-7-2x based architecture. The scope of this document includes both LTE and NR (5G). The white paper provides an update on the progress within the fronthaul working group since the publication of the original white paper in October 2017 and summarizes key aspects of the xRAN fronthaul specification.


xRAN Overview White Paper

The xRAN Forum was formed to develop, standardize and promote an open alternative to the traditionally closed, hardware-based RAN architecture. xRAN fundamentally advances RAN architecture in three areas – decouples the RAN control plane from the user plane, builds a modular eNB software stack that operates on common-off-the-shelf (COTS) hardware and publishes open north- and south-bound interfaces to the industry.


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