An efficient cross-layer buffer management optimization scheme for 5G protocol stack  

作　　者：YANG Xining ZHOU Yiqing CHEN Yang 杨喜宁;ZHOU Yiqing;CHEN Yang(Institute of Computing Technology,Chinese Academy of Sciences,Beijing 100083,P.R.China;School of Computer Science and Technology,University of Chinese Academy of Science,Beijing 100190,P.R.China)

机构地区：[1]Institute of Computing Technology,Chinese Academy of Sciences,Beijing 100083,P.R.China [2]School of Computer Science and Technology,University of Chinese Academy of Science,Beijing 100190,P.R.China

出　　处：《High Technology Letters》2022年第4期384-391,共8页高技术通讯（英文版）

基　　金：Supported by the National Key R&D Project of China(No.2020YFB1807803)。

摘　　要：It is extremely challenging for the 5G User Equipment(UE)to meet the requirement of low-latency data transmission with higher achievable data rates.And user plane processing of 5G protocol stack(PS)is one of the dominating components for end-to-end data transmission in the network system.In this paper,a cross-layer buffer management scheme(CLBM)is proposed.CLBM adopts a zero-copy technique for protocol data unit(PDU)processing between protocol layers and allows to improve the memory operation efficiency significantly with reduced processing latency and CPU usage.Moreover,the PS performance profiling(PSperf)tool,a general evaluation framework for the performance measurement and analysis of PS,is implemented based on the OpenAirInterface(OAI)5G platform.The evaluation result shows that compared with the PS of OAI the CLBM strategy reduces the CPU usage of RLC,PDCP,and MAC layer processing significantly up to 20.6%,63.4%,and 38.8%,respectively.In result,the processing delay of the whole user plane of PS also has been reduced distinctly at various offered traffic load.

关 键 词：cross-layer optimization 5G protocol stack evaluation framework OpenAirInterface(OAI) 

分 类 号：TN929.5[电子电信—通信与信息系统]