the strongest cell consistent with the CD-SSB. It then detects the SI broadcast from that cell to identify its PLMN(s). The UE may conduct a full search in initial cell selection or make use of the stored information to shorten the search, that is, stored information cell selection. The UE searches for a suitable cell, and if it is not able to identify a suitable cell, it may proceed with an acceptable cell. When a suitable cell or an acceptable cell is found, the UE camps on that cell and starts the cell reselection procedure. A suitable cell is one for which the measured cell attributes satisfy the cell selection criteria; the cell PLMN is the selected PLMN, registered, or an equivalent PLMN; the cell is not barred or reserved, and the cell is not part of a tracking area which in the list of forbidden tracking areas for roaming. An acceptable cell is one for which the measured cell attributes satisfy the cell selection criteria and the cell is not barred. Upon transition from RRC_CONNECTED or RRC_INACTIVE to RRC_IDLE, the UE should camp on a cell following cell selection depending on the frequency assigned by the RRC sublayer in the state transition message. The UE should attempt to find a suitable cell in the manner described for stored infor- mation or initial cell selection. If no suitable cell is found on any frequency or RAT, the UE should attempt to find an acceptable cell. In multi-beam operation, the cell quality is derived amongst the beams corresponding to the same cell. Within the frequency span of a carrier, multiple SSBs can be transmitted. The PCIs of SSBs transmitted in different frequency locations do not have to be unique, that is, different SSBs in the frequency domain can have different PCIs. However, when an SSB is associated with an RMSI, the SSB corresponds to an individ- ual cell, which has a unique NR cell global identifier (NCGI). Such an SSB is referred to as CD-SSB. A PCell is always associated with a CD-SSB located on the synchronization raster. 248 Chapter 2 A UE in RRC_IDLE may per