基于SINR最优的VoLTE异频切换优化  

Maximum SINR Oriented Inter-frequency Handover Optimization for Enhancement of VoLTE Service Experience

作　　者：陆健贤[1] 黄济丘 赵旭[2] LU Jianxian;HUANG Jiqiu;ZHAO Xu(Yunfu Branch of China Telecom Co.,Ltd.,Yunfu 527300,China;Research Institute of China Telecom Co.,Ltd.,Guangzhou 510630,China)

机构地区：[1]中国电信股份有限公司云浮分公司,广东云浮527300 [2]中国电信股份有限公司研究院,广东广州510630

出　　处：《移动通信》2021年第1期112-116,共5页Mobile Communications

摘　　要：随着低频段重耕,城区LTE网络实现了1.8 G/2.1 G/800 MHz重叠覆盖,优化异频切换以利用不同频段覆盖的互补性提升VoLTE用户感知是网络优化的重要课题。通过分析路径损耗、SINR、切换对MOS的影响,SINR是其中决定性的因素,根据测试获取的RSRP和SINR之间的映射关系,提出了基于SINR最优的800 MHz和1.8 G/2.1 G异频切换优化方法。经应用验证,优化后可获得更好的的网络性能。With spectrum refarming,the 1.8G/2.1G and 800 MHz LTE RAN are overlaid in urban area without a dominant coverage layer.Inter-frequency handover play an important role in making use of complementary coverage of different frequency layers.The impact of path loss,SINR and handover interruption on VoLTE MOS are investigated through field trial and SINR is found to be the decisive factor.Accordingly,a method of inter-frequency handover optimization is proposed based on the mapping from RSRP to SINR,which is derived from the measurements of real network.The performance after optimization demonstrates significant enhancement in terms of MOS.

关 键 词：VoLTE 用户感知 异频切换 参数优化 

分 类 号：TN929.5[电子电信—通信与信息系统]