作者：王煜辉1，彭东升1，张元生2
单位：1. 中国电信股份有限公司安徽分公司，安徽合肥230031；
      2. 中兴通讯股份有限公司安徽办事处，安徽合肥 230088
中图分类号：TN92       
文献标识码：A        
文章编号：1006-883X(2017)08-0042-05
收稿日期：2017-08-06

摘要：针对中国电信LTE组网使用室内2.1G与室外1.8G异频组网策略下，室内外异频信号交叠覆盖及频繁切换影响用户感知的问题，通过研究不同的重选和切换策略，提出了使用邻区低优先级小区重选方案和A2+A5切换方案，避免了用户频繁异频切换和室内长期占用室外信号的现象，并提供相关小区重选和切换的参数优化具体设置，为优化LTE室内外频繁切换和重选提供了指导方案，使得网优工程师在对室内外异频互操作优化中可以根据现场环境快速完成优化，降低了现场优化的难度，实现用户感知快速提升。
关键词：LTE；异频；重选；切换；策略

Research on LTE interfrequency interoperability strategy between indoor and outdoor
WANG Yu-hui1, PENG Dong-sheng1, ZHANG Yuan-sheng2
1.Anhui Branch, China Telecom Co., LTD., Hefei 230031, China; 2. Anhui Branch, ZTE Corporation, Hefei 230088, China
Abstract:Aiming at the problem that the overlapping coverage and frequent handover of inter-frequency signals between  indoor and outdoor affect user perception under the inter-frequency networking strategy with indoor 2.1G and outdoor 1.8G of China Telecom in LTE systems, ,a reselection scheme of using neighbor cell with low priority   and a handover scheme of A2+A5 are proposed based on the research on the different reselection and handover strategies , to avoid the phenomena of frequent IFHO and long-term occupation of outdoor signals in the indoor. And specific settings for parameter optimization of the related cell reselection and handover are presented to provide a guidance for the optimization of  inter-frequency handover and reselection , which makes  network optimization en-gineers quickly complete the indoor and outdoor interoperability optimization based on site conditions, reduces the difficulty of field opti-mization, and realizes the rapid promotion of user perception.
Keywords: LTE;interfrequency; reselection; handover; strategy

备注：2017年 第23卷 第08期