面向负载均衡的主动切换  

Proactive Handover for Load Balancing

作　　者：朱中杰 刘婷婷[1] 杨晨阳[1] 索士强 黄远芳 ZHU Zhongjie;LIU Tingting;YANG Chenyang;SUO Shiqiang;HUANG Yuanfang(School of Electronic and Information Engineering,Beihang University,Beijing 100191,China;Datang Mobile Communication Equipment Co.,Ltd,Beijing 100191,China)

机构地区：[1]北京航空航天大学电子信息工程学院,北京100191 [2]大唐移动通信设备有限公司,北京100191

出　　处：《信号处理》2021年第7期1142-1152,共11页Journal of Signal Processing

基　　金：国家自然科学基金(61731002)。

摘　　要：为了解决超密集网络中用户在移动过程中由于小区间干扰和负载不均衡导致的用户服务质量下降的问题,本文研究了一种面向负载均衡的主动切换策略,设计了一种基于双门限的移动切换策略,包含小区内的切换与小区间的切换。通过优化小区内的切换门限,可以最小化系统总资源开销。通过优化小区间的切换门限,能够保证用户实时业务需求的同时均衡网络负载。通过预测用户未来大尺度信道信息,设计主动的双门限切换策略,可以有效降低切换延迟。仿真结果表明,与现有的切换策略相比,所提算法不仅提高了资源利用率,还降低了用户掉线概率与切换次数。To mitigate the influence of inter-cell interference and load imbalance on the quality of service(QoS)during the movement of users in ultra-dense network,this paper invesitgate a proactive handover strategy for load balancing.We design a mobile handover strategy based on dual thresholds,including a intra-cell handover that dividing cell center users and cell edge users and a inter-cell handover.The optimized intra-cell handover threshold can minimize the total system resource consumption for the given real-time traffic requrements.The designed inter-cell handover threshold can improve the QoS of mobile users and balance the network load.By predicting the large-scale channel information of users in the future,designing an active dual-threshold handover strategy can effectively reduce the handover delay.The simulation results show that compared with existing handover methods,the proposed proactive handover strategy can effectively reduce the outage probability,reduce the number of user handovers,improve user experience,and reduce system resource consumption.

关 键 词：负载均衡 干扰协调 主动切换 实时业务 

分 类 号：TN929.53[电子电信—通信与信息系统]