LTE和Wi-Fi网络的双时间尺度未授权频谱划分算法  

Two-timescale unlicensed spectrum partitioning algorithm between LTE and Wi-Fi network

作　　者：吴伟华[1] 刘润滋 杨清海[1] WU Weihua;LIU Runzi;YANG Qinghai(School of Telecommunications Engineering,Xidian University,Xi’an 710071,China;School of Information and Control Engineering,Xi’an University of Architecture and Technology,Xi’an 710055,China)

机构地区：[1]西安电子科技大学通信工程学院,陕西西安710071 [2]西安建筑科技大学信息与控制工程学院,陕西西安710055

出　　处：《通信学报》2021年第3期45-53,共9页Journal on Communications

基　　金：国家自然科学基金资助项目(No.61801365,No.61701365,No.61971327);中国博士后科学基金资助项目(No.2018M643581);陕西省高校科协青年人才托举计划基金资助项目(No.20200112);中央高校基本科研业务费专项资金资助项目(No.20103216726)。

摘　　要：根据Wi-Fi和LTE的频谱划分决策分别取决于全局信道状态信息(CSI)和局部CSI,提出了双时间尺度频谱划分算法,在较大时间尺度上根据全局CSI划分Wi-Fi频谱,在较小时间尺度上根据局部CSI划分LTE频谱。设计了自适应反馈补偿机制以提高双时间尺度算法的跟踪性能。此外,得到双时间尺度算法能够无差错地跟踪上均衡点的充分条件。仿真实验表明,双时间尺度算法能够以非常低的开销实现较好系统性能。According to the spectrum partitioning decisions of Wi-Fi and LTE respectively depended on global channel state information(CSI)and local CSI,an online two-timescale iteration algorithm was developed.The Wi-Fi spectrum was partitioned at the large timescale according to the global CSI whereas the LTE spectrum was partitioned according to the fast-changing local CSI.Then,the adaptive compensation mechanism was designed for improving the tracking performance of the two-timescale algorithm.Moreover,the sufficient condition was derived for the two-timescale algorithm tracking the moving equilibrium point without errors.Finally,the simulation results show that the proposed two-timescale algorithm achieves excellent system performance at very low overhead.

关 键 词：未授权频谱 共存 LTE WI-FI 双时间尺度算法 

分 类 号：TN929.5[电子电信—通信与信息系统]