LTE语音业务解决方案研究教材.doc

武汉工程大学邮电与信息工程学院 毕业设计（论文）学生姓名 包拯 学 号 专业班级 通信1104 指导教师 2015年5月 没有任何剽窃、抄袭、造假等违反学术道德、学术规范的行为，也没有侵犯任何其他人或组织的科研成果及专利如摘要 的必要性关键词：Abstract With the rapid development of mobile communication technology, Mobile Broadband had become the main tread of the mobile communication system. The major operators and equipment manufactures are playing more and more attention to the LTE which had become the main evolution solutions of mobile communication system. In the LTE network construction and the use of LTE access, we cannot receive/transmit the signal of CS. In order to make the terminal in the LTE access to initiate voice service, as well as to receive a voice paging, and to handle the ongoing PS service correctly, we produce the dual standby terminal solutions, the technology of CSFB and Volte, that is to say, operator has a mature 2G/3G network. Io order to protect the CS investment, combined with EPS development strategy, we can use original CS domain to provide voice service, and only use the PS domain of LTE network to process data service. So now, how to provide voice call business over LTE system and the interoperability between LTE and 2G/3G system has become critical issue. This paper discussed the necessity and the LTE voice service based on the LTE architecture, and discusses the key technology of LTE, including the OFDM, MIMO technology; then through the LTE voice service continuity problems, analysis of the comparative analysis of dual standby terminal program, CSFB and volte content, network architecture and the key technology and the three schemes. Finally, through a CSFB test and the test is not switched on case analysis that CSFB could be used as a LTE deployment plan at the beginning of the transition, volte is the ultimate voice solutions. Key Words：LTE; the Dual Standby Terminal Solutions; Circuit Switched Fallback; Voice over LTE目录 第1章 绪论 1 1.1 LTE语音业务研究背景 1 1.2 国内外研究现状 2 1.3 本论文研究内容 2 第2章 LTE系统的原理 3 2.1