Section: 5.10.1.3 Multicast MCCH information validity and notification of changes
Content: Change of multicast MCCH information only occurs at specific radio frames, i.e. the concept of a modification period is used. Within a modification period, the same multicast MCCH information may be transmitted a number of times, as defined by its scheduling (which is based on a repetition period). When the network changes (some of) the multicast MCCH information, it notifies the UEs about the change starting from the beginning of the multicast MCCH modification period via PDCCH which schedules the multicast MCCH in every repetition in that modification period. Upon receiving a change notification, a UE receiving MBS multicast service(s) in RRC_INACTIVE acquires the new multicast MCCH information starting from the same slot. The UE applies the previously acquired multicast MCCH information until the UE acquires the new multicast MCCH information.