5G网络中基于波束成形和休眠机制的能量优化策略

Energy optimization strategy based on beamforming and sleep mechanism in 5G networks

为提高频谱利用率,5G毫米波通信采用的波束成形技术会对当前的不连续接收(discontinuous reception,DRX)机制产生不利的影响。提出一个基于信道质量提示(channel quality indication,CQI)反馈的不连续接收机制(C-DRX),波束成形只在必要的时候进行。在此基础上,通过优化波速成形策略进一步降低波束成形时间,达到节省能量和降低时延的目的。采用半马尔科夫过程对波束失准事件下C-DRX的建模分析,仿真分析验证了所提方案的能量和时延的有效性。

In order to improve spectrum efficiency,5G millimeter wave communication adopts beamforming technology,which has an adverse effect on the current discontinuous reception mechanism.In this paper,a discontinuous reception mechanism based on channel quality indication feedback(C-DRX)is proposed,where beamforming is performed only when necessary.On this basis,the beamforming time is reduced by optimizing the beamforming strategy,which further saves energy and reduces time delay.Finally,a semi-markov process is used to model C-DRX in case of beam misalignment.Our numerical simulation analysis achieves a better energy saving and delay performance.