icates the end of the MTCH physical channel if the MCH transport channel allocated more data than the MTCH physical channel requires. 8.4.3.8. ADM control element The Activation/Deactivation MAC (ADM) control element was introduced in Release 10 and concerns activation and deactivation of the SCell secondary radio channels. The ADM control element is used when radio channels have been previously established by an RRC ConnectionSetup or ConnectionReconfiguration message. The control element allows us to reduce UE power consumption, since rapid deactivation of an SCell radio channel allows the mobile to avoid processing relating to that channel. 5G-NR Radio Interface - Data Link Layer 8.5. References All standards can be downloaded from the ETSI website: https://www.etsi.org/ standards. 3GPP 23.501 System architecture for the 5G System (5GS); Version 15.9.0 Release 15 3GPP 37.324 E-UTRA, NR - Multi-connectivity; Overall Description; Version 15.3.0 Release 15 3GPP 37.340 LTE, 5G, NR - Service Data Adaptation Protocol (SDAP); Protocol specification; Version 16.0.0 Release 16 3GPP 38.300 NR - Radio Resource Control (RRC); Protocol specification; Version 16.0.0 Release 16 3GPP 38.321 NR - Medium Access Control (MAC) Protocol specification; Version 15.3.0 Release 15 3GPP 38.322 NR - Radio Link Control Protocol (RLC) specification; Version 15.3.0 Release 15 3GPP 38.323 NR - Packet Data Convergence Protocol (PDCP) specification; Version 16.1.0 Release 16 3GPP 38.331 NR - Radio Resource Control (RRC); Protocol specification; Version 16.0.0 Release 16 5G-NR Radio Interface - Radio Access Procedure 9.1. System information System information broadcasts radio characteristics of the cell, radio characteristics of neighboring cells and alerts. System information consists of a Master Information Block (MIB) message and a series of System Information Block (SIB) messages. The MIB and SIB1 constitute the minimum information for the mobile. SIB 1 carries RMSI (Remaining Minimal System Information). Table 9.1 provides the characteris