摘 要:在4G 网络中,语音业务仍然占着很大的比重。在LTE 网络部署过程中最需要考虑的是高速率的宽带业务,但是由于其本身的全IP 的体系使得4G 网络没办法利用CS 语音方案。选用CSFB 作为中间方案,实质上就是终端设备接着使用现网,使用原来的电路域负责语音业务,终端设备在启动时选择不同的网络,会有不一样的反映。本文介绍了利用传统的GSM/TDSCDMA网络承载LTE 语音的CSFB 技术,重点对其技术要点进行了分析研究,对各种实现方案进行了比较论证。
关键词:CSFB;PS 切换;重定向;部署方案
中图分类号:TN929.5 文献标识码:A 文章编号:2096-4706(2019)08-0053-03
Analysis of Implementation Scheme of TD-LTE CSFB
WANG Guan,ZHANG Zhenhong
(Guangdong Southern Telecom Planning Consulting and Design Institute Co.,Ltd.,Shenzhen 518038,China)
Abstract:In the 4G network,voice service still accounts for a large proportion. In the process of LTE network deployment,the most important thing to consider is high-speed broadband services,but because of its full IP system,4G network can not use CS voice scheme. The choice of CSFB as the intermediate scheme is essentially that the terminal equipment uses the existing network and uses the original circuit domain to take charge of voice business. When the terminal equipment chooses different networks at startup,it will have different reflections. This paper introduces the CSFB technology which carries LTE voice in the traditional GSM/TD-SCDMA network,focuses on the analysis and research of its technical points,and compares and demonstrates various implementation schemes.
Keywords:CSFB;PS switching;redirection;deployment scheme
参考文献:
[1] 周彦,武欣.TD-LTE CSFB 话音解决方案研究 [J]. 移动通信,2011,35(19)43-49.
[2] 李侠宇 EPS 网络CS FallBack 技术研究 [J]. 电信网技术,2009(6):9-13.
作者简介:
王冠(1977-),男,汉族,安徽宿州人,信息院设计一所所长,高级工程师,本科,研究方向:核心网、数据专业咨询规划与设计;
张振宏(1978-),男,汉族,广东揭阳人,高级设计主管,高级工程师,本科,研究方向:通信网络、政府信息化、智慧城市专业规划咨询。