# IVC 5G O-RAN Summary

###### tags: `UNILA`

## Summary 27th of July 2021

Name : Dimas Danu Saputra
Student ID : 1915031076
Summary “Functional Split and Open Fronthaul Interface (OFI)”

# 5G New Radio (NR)

* Scalable numerologies for
* Beamforming
* New channel coding
* flexible and modular RAN architecture:
* Native end-to-end support for Networking Slicing


# Functional Split Overview

The number of functions remaining locally at the antenna location, and the number of functions centered on the available data center are expressed in functional split. A number of different functional separates are currently being prepared for use for NR.
Functional split determines how many working Base Stations (BS) go out locally, close to the user, with the benefit of reducing fronthaul network bitrates and delayed requirements, and how much functionality must be centralized.

The common Public Radio Inter face (CPRI) specifications that have come to be used in conventional C-RAN do not sufficiently prescribe specifications for fromthaul interfaces, and as a result, there are now many regions having original specifications prescribe by different vendors.
The Open RAN (O-RAN) fromthaul specifications were formulated against this background and are expected to help make multivendor RAN a reality in the 5G era.
Furthermore, in the face of this bandwidth problem, O-RAN fromthaul specifications include a new provison for functional splitting call split option.

- O-RAN Architecture

# Protocol Stack
In the C/U-Plane, the O-RAN fronthaul specifications support a protocol stack that transmits signals used by eCPRI or Radio over Ethernet (RoE) directly over Ethernet and an optional protocol stack that transmits the signals over User Datagram Protocol (UDP).
In the S-Plane, meanwhile, The O-RAN fronthaul specifications support a protocol stack that transmits signals used in Precision Time Protocol (PTP) and SyncE over Ethernet.

Finally, in the M-plane, the O-RAN fronthaul specifications support a protocol stack that transmits signals used in NETwork CONFiguration protocol (NETCONF) over Ethernet/IP/Transmission Control Protocol (TCP)/Secure SHell (SSH)