Downlink Fronthaul Compression in Frequency Domain using OpenAirInterface

• DOI: 10.14209/sbrt.2019.1570558753
• Publication Date: 2020-04-20T19:38:48Z
• Authors: Cleverson Nahum; Leonardo Ramalho; Joary Fortuna; Chenguang Lu; Miguel Berg; Igor Almeida; Aldebaro Klautau
• Keywords: Signal Processing (eess.SP); 0203 mechanical engineering; FOS: Electrical engineering, electronic engineering, information engineering; 0202 electrical engineering, electronic engineering, information engineering; 02 engineering and technology; Electrical Engineering and Systems Science - Signal Processing

This paper presents a compression scheme developed for the transport of downlink radio signals in packet fronthaul centralized-radio access networks (C-RAN). The technique is tailored to frequency-domain functional splits, which inactive LTE (or 5G NR) resource elements may not be transmitted packets. allows decreasing link data rate, especially when cell load low. based on two parts: transmission side information indicate active and LTE, nonuniform scalar quantization compress QAM symbols elements. method was implemented OpenAirInterface (OAI) software real-time evaluation. testbed results show significant reduction usage with low computational cost.