This document is part of the RAN WI "Introduction of the Multimedia Broadcast Multicast Service (MBMS) in RAN" and it is linked to TS 22.146 "Multimedia Broadcast Multicast Service; Stage-1" and the SA2 WI "Multimedia Broadcast/Multicast Service Architecture", the work of which is reflected in TS 23.246. 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".