5G毫米波通信中基于波束赋形的节能机制  

Energy Saving Mechanism based on Beamforming in 5G Millimeter Wave Communication

作　　者：陈发堂[1] 吴峰 CHEN Fa-tang;WU Feng(School of Communication and Information Engineering,Chongqing University of Posts and Telecommunications,Chongqing 400065,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：《光通信研究》2021年第5期73-78,共6页Study on Optical Communications

基　　金：国家科技重大专项基金资助项目(2017ZX03001021)。

摘　　要：毫米波通信技术尽管能够满足第五代移动通信技术(5G)的设计指标,但是毫米波在传输过程中的路径损耗严重影响了其传输性能,需要使用波形赋形技术来集中传输的能量以削弱路径损耗带来的影响,而传统的非连续接收(DRX)机制应用在波束赋形系统中会导致波束失准,在5G系统中已不再适用。针对以上问题,文章提出一种长周期可调整的定向DRX(A-ODRX)机制,将波束搜索状态并入到长周期状态来克服波束失准,同时引入了长周期递增系数以节省功耗,采用半马尔可夫链和欧洲电信标准化委员会(ETSI)流量模型对A-ODRX机制进行了模拟仿真,仿真分析了A-ODRX机制下的平均延迟、节能效果以及波束失准概率。仿真结果表明,A-ODRX机制可以在明显降低波束失准概率的同时有效地降低终端的能耗。Although millimeter-wave communication technology can meet the design indicators of 5th Generation Mobile Networks(5G)communication,the path loss of millimeter-wave in the transmission process seriously affects its transmission performance.Therefore,waveform shaping technology is needed to concentrate the transmission energy to reduce the impact of path loss.However,the traditional Discontinuous Reception(DRX)mechanism will lead to beam misalignment in the beam shaping system,which is no longer applicable in 5G system.In order to solve the above problems,this research proposes a long-period Adjustable Orientation DRX(A-ODRX)mechanism.The beam search state is merged into the long period state to overcome beam misalignment,and a long period incremental coefficient is introduced to save power consumption.The semi-Markov chain and the European Telecommunications Standards Institute(ETSI)traffic model are used to simulate the A-ODRX mechanism.The average delay,energy saving effect and beam misalignment probability of A-ODRX mechanism are analyzed in simulation.The results show that the A-ODRX mechanism can significantly reduce the beam misalignment probability while effectively reducing the energy consumption of the terminal.

关 键 词：第五代移动通信技术 毫米波 波束赋形 可调整的定向非连续接收 半马尔可夫 

分 类 号：TN929[电子电信—通信与信息系统]