通信学报 ›› 2019, Vol. 40 ›› Issue (4): 212-222.doi: 10.11959/j.issn.1000-436x.2019090

• 学术通信 • 上一篇    

5G双连接场景下的低传输时延切换机制

裴旭明1,贾建鑫1,2,钱骅1,朱正航1,唐振宇1,康凯1()   

  1. 1 中国科学院上海高等研究院,上海 201210
    2 上海海事大学信息工程学院,上海 210306
  • 修回日期:2019-03-01 出版日期:2019-04-25 发布日期:2019-05-05
  • 作者简介:裴旭明(1984- ),男,辽宁铁岭人,中国科学院上海高等研究院工程师,主要研究方向为LTE与5G无线通信系统。|贾建鑫(1988- ),男,山东青岛人,上海海事大学博士生,中国科学院上海高等研究院助理工程师,主要研究方向为LTE与5G无线通信系统。|钱骅(1976- ),男,江苏武进人,博士,中国科学院上海高等研究院研究员,主要研究方向为无线通信系统的物理层理论研究与实现、非线性信号处理及大数据信号处理理论等。|朱正航(1982- ),男,山西晋中人,中国科学院上海高等研究院高级工程师,主要研究方向为5G、软件无线电。|唐振宇(1993- ),男,安徽巢湖人,中科院上海高等研究院助理工程师,主要研究方向为软件无线电、物联网数据平台。|康凯(1977- ),男,黑龙江哈尔滨人,博士,中科院上海高等研究院正高级工程师,主要研究方向为5G通信系统、下一代Wi-Fi系统。
  • 基金资助:
    国家科技重大专项课题基金资助项目(2017ZX03001019);国家自然科学基金资助项目(61671436)

Low latency handover scheme for 5G dual-connectivity scenario

Xuming PEI1,Jianxin JIA1,2,Hua QIAN1,Zhenghang ZHU1,Zhenyu TANG1,Kai KANG1()   

  1. 1 Shanghai Advanced Research Institute,Chinese Academy of Sciences,Shanghai 201210,China
    2 College of Information Engineering,Shanghai Maritine University,Shanghai 201306,China
  • Revised:2019-03-01 Online:2019-04-25 Published:2019-05-05
  • Supported by:
    The National Science and Technology Major Project of China(2017ZX03001019);The National Natural Science Foundation of China(61671436)

摘要:

针对5G双连接切换中辅基站不变的场景,提出了一种新型切换机制。利用辅基站在切换过程中传输数据,以降低传统切换方式中因完全断开双连接导致数据传输中断所引起的时延。首先,对传统切换机制进行分析并进行问题定位;其次,提出和详细阐述新型切换机制的信令交互流程,并分别建立新型切换机制与传统切换机制中数据传输时序模型;最后,基于数据传输时序模型,用数学推导和仿真的方法对新型机制与传统机制进行对比评估,相关结果显示出新型机制在单个数据分组传输时延、数据分组平均传输时延和数据分组总传输时延三方面的优势。

关键词: 双连接切换, 传输时延, 信令交互

Abstract:

A novel handover scheme was proposed for the secondary node (SN) unchanged 5G dual-connectivity scenarios.In the proposed novel scheme,the SN connection was maintained for data packet transmission during the handover,however,both the main node (MN) and the SN were completely disconnected in the legacy scheme.The transmission delay during handover was decreased greatly by the proposed scheme.Firstly,the legacy handover scheme was analyzed and its deficiency was figured out.Then,the novel mechanism’s signaling interaction was elaborated and the time sequence models for the novel scheme and the legacy scheme were further established.Finally,based on the time sequence model,the performance evaluation processes were carried out in terms of mathematical modeling and experimental simulations.The analysis results demonstrate that the proposed novel scheme reduces the single packet transmission delay,the average transmission delay and the total transmission delay,and has good performance advantages.

Key words: dual-connectivity handover, transmission delay, signaling interaction

中图分类号: 

  • TN929.5