C. Nahum, Leonardo Ramalho, Joary Fortuna, Chenguang Lu, M. Berg, Igor Almeida, A. Klautau
{"title":"Downlink Fronthaul Compression in Frequency Domain using OpenAirInterface","authors":"C. Nahum, Leonardo Ramalho, Joary Fortuna, Chenguang Lu, M. Berg, Igor Almeida, A. Klautau","doi":"10.14209/sbrt.2019.1570558753","DOIUrl":null,"url":null,"abstract":"This paper presents a compression scheme developed for the transport of downlink radio signals in packet fronthaul of centralized-radio access networks (C-RAN). The technique is tailored to frequency-domain functional splits, in which inactive LTE (or 5G NR) resource elements may not be transmitted in the packets. This allows decreasing the link data rate, especially when the cell load is low. The compression scheme is based on two parts: transmission of side information to indicate active and inactive resource elements of the LTE, and nonuniform scalar quantization to compress the QAM symbols of the active resource elements. The method was implemented in the OpenAirInterface (OAI) software for real-time evaluation. The testbed results show a significant reduction in link usage with a low computational cost.","PeriodicalId":135552,"journal":{"name":"Anais de XXXVII Simpósio Brasileiro de Telecomunicações e Processamento de Sinais","volume":"36 1","pages":"0"},"PeriodicalIF":0.0000,"publicationDate":"2020-01-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Anais de XXXVII Simpósio Brasileiro de Telecomunicações e Processamento de Sinais","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.14209/sbrt.2019.1570558753","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
引用次数: 0
Abstract
This paper presents a compression scheme developed for the transport of downlink radio signals in packet fronthaul of centralized-radio access networks (C-RAN). The technique is tailored to frequency-domain functional splits, in which inactive LTE (or 5G NR) resource elements may not be transmitted in the packets. This allows decreasing the link data rate, especially when the cell load is low. The compression scheme is based on two parts: transmission of side information to indicate active and inactive resource elements of the LTE, and nonuniform scalar quantization to compress the QAM symbols of the active resource elements. The method was implemented in the OpenAirInterface (OAI) software for real-time evaluation. The testbed results show a significant reduction in link usage with a low computational cost.
京公网安备 11010802042870号
京ICP备2023020795号-1
分享
求助内容：
应助结果提醒方式：
扫码关注我们
