面向5G毫米波通信的有向非连续接收机制  

Directional discontinuous reception mechanism for 5G millimeter wave communication

作　　者：陈发堂[1] 孟昭 CHEN Fatang;MENG Zhao(School of Communications and Information Engineering,Chongqing University of Posts and Telecommunications,Chongqing 400065,P.R.China)

机构地区：[1]重庆邮电大学通信与信息工程学院,重庆400065

出　　处：《重庆邮电大学学报（自然科学版）》2021年第3期396-402,共7页Journal of Chongqing University of Posts and Telecommunications(Natural Science Edition)

基　　金：国家科技重大专项(2017ZX03001021)。

摘　　要：毫米波为5G通信提供了更大的带宽,但其路径损耗和穿透损耗较大的缺点需要使用波束赋形技术来克服。传统的非连续接收(discontinues reception,DRX)机制由于在用于波束赋形系统中时会导致频繁的波束失准,从而影响通信质量,已不能满足系统要求。针对这一问题,提出了一种长睡眠周期可调整的有向DRX(adjustable directional DRX,A-DDRX)机制,通过单独设立波束搜索状态来克服波束失准问题,并引入了长睡眠周期增长因子来弥补波束搜索状态所带来的功耗的增加,利用半马尔可夫过程和欧洲电信标准化委员会(european telecommunications standards institute,ETSI)流量模型对A-DDRX机制进行了数学分析。仿真分析了A-DDRX机制的波束失准概率,功率节省因子以及平均时延。仿真结果表明,所提出的A-DDRX机制在能够避免频繁波束失准的前提下,对于降低终端能耗方面有所改善。Millimeter wave provides wider bandwidth for 5G communication,but the shortcomings of high path loss and penetration loss call for beamforming technology to overcome.The conventional Discontinues Reception(DRX)mechanism cannot meet the system requirements because of frequent beam misalignment when used in beamforming system,which affects the quality of communication.This research proposes a long sleep cycle Adjustable Directional DRX(A-DDRX)mechanism.A beam search state is set up separately to overcome beam misalignment,and a long sleep cycle growth factor is introduced to compensate for the increase of power consumption caused by the beam search state.Numerical analysis of A-DDRX mechanism is carried out using semi-Markov process and European Telecommunications Standards Institute(ETSI)traffic model.The beam misalignment probability,power saving factor and average delay of A-DDRX mechanism are simulated.The results show that the proposed A-DDRX mechanism can reduce the energy consumption of terminal on the premise of avoiding frequent beam misalignment.

关 键 词：5G 波束赋形 A-DDRX 半马尔可夫过程 

分 类 号：TN914.53[电子电信—通信与信息系统]