|
所在平台: Udemy |
课程主页: https://www.udemy.com/course/lte-protocol-testing-basic-to-advanced-part-3/
课程评论：没有评论
课程名称：LTE协议测试：从基础到高级 [第3部分] 课程概述：在电信领域，长期演进（LTE）是用于移动设备和数据终端的无线宽带通信标准，基于GSM/EDGE和UMTS/HSPA技术。LTE通过采用不同的无线接口和核心网络改进，提升了容量和速度，是运营商在GSM/UMTS和CDMA2000网络上的升级路径。由于不同国家使用的LTE频率和频段不同，只有多频段手机才能在所有支持LTE的国家使用LTE标准。此标准由3GPP（第三代合作伙伴计划）制定，具体规定在其第8版文档系列中，较小的增强则描述在第9版中。LTE有时被称为3.95G，并以“4G LTE”和“高级4G”进行市场营销，但其实它并未满足3GPP第8和第9文档系列中对真正4G无线服务的技术标准要求。尽管如此，受市场压力及WiMAX、演变高速分组接入及LTE对原有3G技术的重大进步影响，国际电信联盟（ITU）后来决定将LTE及上述技术称为4G技术。同时，LTE Advanced标准正式满足ITU-R对IMT-Advanced的要求，因此ITU将LTE Advanced和WiMAX-Advanced划分为“真正的4G”。 课程大纲：暂无。
In telecommunications, Long-Term Evolution (LTE) is a standard for wireless broadband communication for mobile devices and data terminals, based on the GSM/EDGE and UMTS/HSPA technologies. It increases the capacity and speed using a different radio interface together with core network improvements. LTE is the upgrade path for carriers with both GSM/UMTS networks and CDMA2000 networks. The different LTE frequencies and bands used in different countries mean that only multi-band phones are able to use LTE in all countries where it is supported. The standard is developed by the 3GPP (3rd Generation Partnership Project) and is specified in its Release 8 document series, with minor enhancements described in Release 9. LTE is sometimes known as 3.95G and has been marketed both as "4G LTE" and as "Advanced 4G",[citation needed] but it does not meet the technical criteria of a 4G wireless service, as specified in the 3GPP Release 8 and 9 document series for LTE Advanced. The requirements were originally set forth by the ITU-R organisation in the IMT Advanced specification. However, due to marketing pressures and the significant advancements that WiMAX, Evolved High Speed Packet Access, and LTE bring to the original 3G technologies, ITU later decided that LTE together with the aforementioned technologies can be called 4G technologies.[3] The LTE Advanced standard formally satisfies the ITU-R requirements to be considered IMT-Advanced. To differentiate LTE Advanced and WiMAX-Advanced from current 4G technologies, ITU has defined them as "True 4G".
