内部资料注意保存中国联通LTE无线网络优化指导书第6分册：切换及互操作优化指导手册中国联通集团移动网络公司运行维护部中国联通网络技术研究院2013年11月中国联通运行维护部中国联通网络技术研究院中国联通LTE无线网络优化指导书--切换及互操作优化指导手册PAGE\*MERGEFORMAT26目录TOC\o"1-3"\h\z\uHYPERLINK\l"_Toc372294280"1概述PAGEREF_Toc372294280\h4HYPERLINK\l"_Toc372294281"2LTE切换原理PAGEREF_Toc372294281\h4HYPERLINK\l"_Toc372294282"2.1Intra-eNodeB切换PAGEREF_Toc372294282\h4HYPERLINK\l"_Toc372294283"2.2基于X2接口的切换PAGEREF_Toc372294283\h4HYPERLINK\l"_Toc372294284"2.3基于S1接口的切换PAGEREF_Toc372294284\h5HYPERLINK\l"_Toc372294285"2.4TDD和FDD的切换PAGEREF_Toc372294285\h5HYPERLINK\l"_Toc372294286"3LTE互操作原理PAGEREF_Toc372294286\h5HYPERLINK\l"_Toc372294287"3.1空闲态互操作原理PAGEREF_Toc372294287\h5HYPERLINK\l"_Toc372294288"3.1.1LTE到2G/3G小区重选PAGEREF_Toc372294288\h6HYPERLINK\l"_Toc372294289"3.1.22G/3G到LTE小区重选PAGEREF_Toc372294289\h7HYPERLINK\l"_Toc372294290"3.2连接态PS业务互操作原理PAGEREF_Toc372294290\h9HYPERLINK\l"_Toc372294291"3.2.1LTE到3G的切换PAGEREF_Toc372294291\h10HYPERLINK\l"_Toc372294292"3.2.2LTE到2G的切换PAGEREF_Toc372294292\h10HYPERLINK\l"_Toc372294293"3.2.33G到LTE的切换PAGEREF_Toc372294293\h11HYPERLINK\l"_Toc372294294"3.2.42G到LTE的切换PAGEREF_Toc372294294\h11HYPERLINK\l"_Toc372294295"3.2.5LTE到2G/3G的重定向PAGEREF_Toc372294295\h11HYPERLINK\l"_Toc372294296"3.2.62G/3G到LTE的重定向PAGEREF_Toc372294296\h13HYPERLINK\l"_Toc372294297"3.3CSFB语音业务互操作原理PAGEREF_Toc372294297\h14HYPERLINK\l"_Toc372294298"3.3.1CSFB的技术原理PAGEREF_Toc372294298\h14HYPERLINK\l"_Toc372294299"3.3.2CSFB的信令流程PAGEREF_Toc372294299\h15HYPERLINK\l"_Toc372294300"4GUL互操作总体推荐策略PAGEREF_Toc372294300\h17HYPERLINK\l"_Toc372294301"4.1空闲态PAGEREF_Toc372294301\h18HYPERLINK\l"_Toc372294302"4.2PS连接态PAGEREF_Toc372294302\h18HYPERLINK\l"_Toc372294303"4.3CSFB语音业务PAGEREF_Toc372294303\h20HYPERLINK\l"_Toc372294304"5LTE切换问题优化方法及流程PAGEREF_Toc372294304\h20HYPERL