关于4G核心网和5G核心网的介绍（很好！） https://blog.csdn.net/Rong_Toa/article/details/89285093
单载波与多载波 https://wenku.baidu.com/view/bceaaf47af45b307e87197ec.html
3GPP组织结构和文档命名 https://blog.csdn.net/milkbusy/article/details/80834014
https://blog.csdn.net/jxwxg/article/details/73520841?depth_1-utm_source=distribute.pc_relevant.none-task&utm_source=distribute.pc_relevant.none-task
SPS http://blog.sina.com.cn/s/blog_138e263a20102wj9d.html
术语解释 http://www.txrjy.com/thread-971365-1-13.html