ETSI TR 125 992是RAN WI“在RAN中引入多媒体广播多播服务（MBMS）”的一部分，它与3GPP TS 22.146“多媒体广播多播服务相链接；第1阶段“[2]和SA2 WI“多媒体广播/多播服务架构”，其工作反映在3GPP TS 23.246[3].本文件的目的是解决UTRAN和GERAN MBMS要求，以帮助TSG RAN和TSG GERAN工作组解决现有规范所需的变更，并确定引入WI“在RAN中引入多媒体广播多播服务（MBMS）”所需的新规范。

ETSI TR 125 992 is part of the RAN WI"Introduction of the Multimedia Broadcast Multicast Service (MBMS) in RAN'and it is linked to 3GPP TS 22.146 "Multimedia Broadcast Multicast Service; Stage-1" [2] and the SA2 WI "Multimedia Broadcast/Multicast Service Architecture", the work of which is reflected in 3GPP TS 23.246 [3].The purpose of the present document is to address the UTRAN and GERAN MBMS requirements in order to help the TSG RAN and TSG GERAN working groups address the changes needed to existing specifications and also identify new specifications, that are required for the introduction of the WI"Introduction of the Multimedia Broadcast Multicast Service (MBMS) in RAN".