9.3 MIB and Cell Value Tag range extension

25.3003GPPGeneral descriptionRelease 17Stage 2TSUniversal Terrestrial Radio Access Network (UTRAN)

To reduce the risk of Cell Value Tag wrap around, the network may broadcast a range extension (1..16) of the Cell Value Tag for SIB3, SIB5, SIB5bis, SIB21 and SIB22. The network may also extend the MIB value tag range (1..16). For UEs supporting these extensions the SIBs and MIB wrap around at 16, while for UEs not supporting this feature the SIBs wraps around at 4 (and MIB at 8). SIBs of REL-12 or later use the extended Cell Value Tag range (1..16).