Critical Issues of Centralized and Cloudified LTE-FDD Radio Access Networks

Alyafawi, Islam Fayez Abd; Schiller, Eryk Jerzy; Braun, Torsten; Dimitrova, Desislava Cvetanova; Nobre Gomes, André Sérgio; Nikaein, Navid (June 2015). Critical Issues of Centralized and Cloudified LTE-FDD Radio Access Networks. In: IEEE ICC 2015 - Next Generation Networking Symposium (ICC'15 (07) NGN). London, United Kingdom. 08.06.-12.06.2015. 10.1109/ICC.2015.7249202

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Cloudification of the Centralized-Radio Access Network (C-RAN) in which signal processing runs on general purpose processors inside virtual machines has lately received significant attention. Due to short deadlines in the LTE Frequency Division Duplex access method, processing time fluctuations introduced by the virtualization process have a deep impact on C-RAN performance. This paper evaluates bottlenecks of the OpenAirInterface (OAI is an open-source software-based implementation of LTE) cloud performance, provides feasibility studies on C-RAN execution, and introduces a cloud architecture that significantly reduces the encountered execution problems. In typical cloud environments, the OAI processing time deadlines cannot be guaranteed. Our proposed cloud architecture shows good characteristics for the OAI cloud execution. As an example, in our setup more than 99.5% processed LTE subframes reach reasonable processing deadlines close to performance of a dedicated machine.

Item Type:

Conference or Workshop Item (Paper)


08 Faculty of Science > Institute of Computer Science (INF) > Communication and Distributed Systems (CDS)
08 Faculty of Science > Institute of Computer Science (INF)

UniBE Contributor:

Alyafawi, Islam Fayez Abd, Schiller, Eryk Jerzy, Braun, Torsten, Dimitrova, Desislava Cvetanova, Nobre Gomes, André Sérgio


000 Computer science, knowledge & systems
500 Science > 510 Mathematics




Dimitrios Xenakis

Date Deposited:

29 Apr 2015 11:44

Last Modified:

05 Dec 2022 14:45

Publisher DOI:


Uncontrolled Keywords:

Centralized RAN; Cloudified RAN; LTE FDD




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