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Performance Analysis of Cloud Radio Access Network

Chekol, Asrat Temare
Master thesis
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URI
http://hdl.handle.net/11250/2461339
Date
2017
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  • Institutt for informasjonssikkerhet og kommunikasjonsteknologi [1947]
Abstract
The mobile traffic is exploding due to an increase in number and type

of devices; and complexity of services. There is also rising of Capital

Expenditure (CAPEX) and Operational Expenditure (OPEX) while the

Average Revenue Per User (ARPU) is falling. This is a big challenge for

mobile operators and equipment vendors. Maximizing capacity, improving

quality of service and reversing the falling ARPU is required and this

couldn t be achieved with the traditional RAN architecture. As a result,

advancements in RAN architecture, data transport solution and transport

protocol for the fronthaul have been done.

In this thesis work different RAN architectures, C-RAN functional split

options between BBU and RRH, data transport solutions and interface

protocols for the fronthaul have been surveyed. Then, performance test

has been done on a simple C-RAN implementation containing an open

source core network, BBU and RRH with emulated User Equipment (UE)

all from OAI. The implementation has been done with PHY-RF split

between the BBU and RRH, which have been connected over Ethernet

through Ethernet switch. Finally, analysis of measurement results, and

comparison with theoretical results found from literature has been done.

The performance test measurement results showed that a fully centralized

C-RAN implementation with Ethernet as a fronthaul protocol cloud

meet strict timing requirements of the fronthaul in terms of packet delay

and jitter. Packets are observed arriving successfully before the delay

deadline with a tolerable loss, but further work is required to improve the

throughput and increase the separation distance between BBU and RRH.
Publisher
NTNU

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