Performance Analysis of Cloud Radio Access Network
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The mobile traffic is exploding due to an increase in number and typeof devices; and complexity of services. There is also rising of CapitalExpenditure (CAPEX) and Operational Expenditure (OPEX) while theAverage Revenue Per User (ARPU) is falling. This is a big challenge formobile operators and equipment vendors. Maximizing capacity, improvingquality of service and reversing the falling ARPU is required and thiscouldn t be achieved with the traditional RAN architecture. As a result,advancements in RAN architecture, data transport solution and transportprotocol for the fronthaul have been done. In this thesis work different RAN architectures, C-RAN functional splitoptions between BBU and RRH, data transport solutions and interfaceprotocols for the fronthaul have been surveyed. Then, performance testhas been done on a simple C-RAN implementation containing an opensource core network, BBU and RRH with emulated User Equipment (UE)all from OAI. The implementation has been done with PHY-RF splitbetween the BBU and RRH, which have been connected over Ethernetthrough Ethernet switch. Finally, analysis of measurement results, andcomparison with theoretical results found from literature has been done. The performance test measurement results showed that a fully centralizedC-RAN implementation with Ethernet as a fronthaul protocol cloudmeet strict timing requirements of the fronthaul in terms of packet delayand jitter. Packets are observed arriving successfully before the delaydeadline with a tolerable loss, but further work is required to improve thethroughput and increase the separation distance between BBU and RRH.