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4G LTE模式下,引入了MBMS演进版本eMBMS(CVolved MBMS)。由于eMBMS对于LTE的商用部署来说并不是非常紧迫,因此协议定义被分步进行,物理层部分在版本8中定义,高层及网络相关部分在版本9中完成。罗德与施瓦茨(中国)科技有限公司孙庆国所撰《eMBMS原理及R&S CMWcards解决方案介绍》一文首先阐述了eMBMS的理论,并提出了基于R&S CMW500协议分析仪的CMWcards测试解决方案。由于CMWcards基于MLAPI开发,且底层实现与MLAPI完全相同,因此对MLAPI也做了简单介绍。未来推出的CMWcards Advanced模式可以在卡片上实现对所有高层信令消息的配置,使CMWcards的灵活性获得显著提升。
In 4G LTE mode, MBMS evolved version eMBMS (CVM MBMS) was introduced. Since eMBMS is not very urgent for the commercial deployment of LTE, the protocol definition is stepped up, the physical layer part is defined in Release 8, and the upper layer and network related parts are done in Release 9. An essay entitled “Introduction to eMBMS Principles and Solutions for R & S CMWcards” by Sun Qingguo, Rohde & Schwarz (China) Technology Co., Ltd., first described the theory of eMBMS and proposed a CMWcards test solution based on the R & S CMW500 protocol analyzer. Because CMWcards is based on MLAPI development, and the underlying implementation is exactly the same as MLAPI, MLAPI is also introduced briefly. The CMWcards Advanced model introduced in the future enables the configuration of all high-level signaling messages on the card, resulting in significant improvements in the flexibility of CMWcards.