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

Text icc-critical.pdf - Published Version Restricted to registered users only Available under License Publisher holds Copyright. Download (431kB) | Request a copy

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.

Interest & Impact

Downloads

15 since deposited on 29 Apr 2015
0 in the past 12 months

Citations

5 Citations in Web of Science ®
6 Citations in Scopus

Search

in Google Scholar™

Services

Actions (login required)

Edit item

Actions (login required)

Edit item