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 domin...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.展开更多
针对地铁无人值守车站信号设备房小型不间断电源(Uninterruptible Power Supply,UPS)因缺乏在线监测而导致故障影响大的问题,开展了基于5G和简单网络管理协议(Simple Network Management Protocol,SNMP)的小型UPS在线监测方法研究,对监...针对地铁无人值守车站信号设备房小型不间断电源(Uninterruptible Power Supply,UPS)因缺乏在线监测而导致故障影响大的问题,开展了基于5G和简单网络管理协议(Simple Network Management Protocol,SNMP)的小型UPS在线监测方法研究,对监测系统的原理及组成进行了详细的阐述,分析了SNMP协议的管理信息库(Management Information Base,MIB),并给出了MIB库的应用方法,运用5G技术进行数据传输,最后通过编制应用软件,实现了型号为UHA1R-0030L的艾默生小型UPS的远程实时数据采集,为地铁无人值守车站小型UPS远程监测提供了解决方案,对解决长期以来地铁无人值守车站小型UPS发生故障无法及时处理的问题具有十分重要的意义。展开更多
移动通信系统的演进,离不开先进技术的应用、网络结构的升级和协议栈的改进。文章结合第三代合作伙伴计划(the 3rd Generation Partner Project,3GPP)标准讨论了第五代移动通信(the 5th Generation Mobile Communication Technology,5G...移动通信系统的演进,离不开先进技术的应用、网络结构的升级和协议栈的改进。文章结合第三代合作伙伴计划(the 3rd Generation Partner Project,3GPP)标准讨论了第五代移动通信(the 5th Generation Mobile Communication Technology,5G)协议栈的总体架构。以服务数据适配协议(Service Data Adaptation Protocol,SDAP)层和分组数据汇聚协议(Packet Data Convergence Protocol,PDCP)层为例,阐述接入网协议栈的改进。分析了2个子层的功能、架构、实体、数据传输流程以及协议数据单元(Protocol Data Unit,PDU)格式,为移动通信系统的优化奠定基础。展开更多
5G环境下的互联网协议第6版(Internet Protocol Version 6,IPv6)网络面临着诸多安全挑战和隐私风险,包括数据窃取、身份盗用及网络攻击等,对用户隐私保护提出了更高的要求。因此,探索适用于IPv6的区域性数据加密技术和隐私保护策略显得...5G环境下的互联网协议第6版(Internet Protocol Version 6,IPv6)网络面临着诸多安全挑战和隐私风险,包括数据窃取、身份盗用及网络攻击等,对用户隐私保护提出了更高的要求。因此,探索适用于IPv6的区域性数据加密技术和隐私保护策略显得尤为重要。文章探讨了5G环境下IPv6网络面临的安全挑战和隐私风险,分析多种区域性数据加密和网络隐私保护策略,为实现更安全、更私密的网络通信环境提供理论依据和实践指南。展开更多
5G引入分组数据汇聚协议复制(packet data convergence protocol duplication,PD)功能以解决超可靠低时延通信应用场景的通信需求。为实现PD功能,设计基于5G双连接架构的PD协议栈架构、动态控制PD激活与去激活机制和应用PD的切换过程。...5G引入分组数据汇聚协议复制(packet data convergence protocol duplication,PD)功能以解决超可靠低时延通信应用场景的通信需求。为实现PD功能,设计基于5G双连接架构的PD协议栈架构、动态控制PD激活与去激活机制和应用PD的切换过程。通过建立PD的性能评估模型,仿真分析结果表明,在小区边缘,PD在满足可靠性和时延要求的同时比单链路减少30%的无线资源占用,在用户设备移动过程中,PD满足高可靠低时延需求并提高了2%的无线资源利用率。PD能够在不增加无线接入网复杂性的情况下,同时满足1-10-5的可靠性和1ms的时延需求。展开更多
基金Supported by the National Key R&D Project of China(No.2020YFB1807803)。
文摘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.
文摘针对地铁无人值守车站信号设备房小型不间断电源(Uninterruptible Power Supply,UPS)因缺乏在线监测而导致故障影响大的问题,开展了基于5G和简单网络管理协议(Simple Network Management Protocol,SNMP)的小型UPS在线监测方法研究,对监测系统的原理及组成进行了详细的阐述,分析了SNMP协议的管理信息库(Management Information Base,MIB),并给出了MIB库的应用方法,运用5G技术进行数据传输,最后通过编制应用软件,实现了型号为UHA1R-0030L的艾默生小型UPS的远程实时数据采集,为地铁无人值守车站小型UPS远程监测提供了解决方案,对解决长期以来地铁无人值守车站小型UPS发生故障无法及时处理的问题具有十分重要的意义。
文摘移动通信系统的演进,离不开先进技术的应用、网络结构的升级和协议栈的改进。文章结合第三代合作伙伴计划(the 3rd Generation Partner Project,3GPP)标准讨论了第五代移动通信(the 5th Generation Mobile Communication Technology,5G)协议栈的总体架构。以服务数据适配协议(Service Data Adaptation Protocol,SDAP)层和分组数据汇聚协议(Packet Data Convergence Protocol,PDCP)层为例,阐述接入网协议栈的改进。分析了2个子层的功能、架构、实体、数据传输流程以及协议数据单元(Protocol Data Unit,PDU)格式,为移动通信系统的优化奠定基础。
文摘5G环境下的互联网协议第6版(Internet Protocol Version 6,IPv6)网络面临着诸多安全挑战和隐私风险,包括数据窃取、身份盗用及网络攻击等,对用户隐私保护提出了更高的要求。因此,探索适用于IPv6的区域性数据加密技术和隐私保护策略显得尤为重要。文章探讨了5G环境下IPv6网络面临的安全挑战和隐私风险,分析多种区域性数据加密和网络隐私保护策略,为实现更安全、更私密的网络通信环境提供理论依据和实践指南。
文摘5G引入分组数据汇聚协议复制(packet data convergence protocol duplication,PD)功能以解决超可靠低时延通信应用场景的通信需求。为实现PD功能,设计基于5G双连接架构的PD协议栈架构、动态控制PD激活与去激活机制和应用PD的切换过程。通过建立PD的性能评估模型,仿真分析结果表明,在小区边缘,PD在满足可靠性和时延要求的同时比单链路减少30%的无线资源占用,在用户设备移动过程中,PD满足高可靠低时延需求并提高了2%的无线资源利用率。PD能够在不增加无线接入网复杂性的情况下,同时满足1-10-5的可靠性和1ms的时延需求。