he procedure to transit from Idle Mode to Connected Mode by 2.5 ms. Furthermore, a shorter cycle of Physical Uplink Control Channel (PUCCH) would reduce the average waiting time for a synchronized UE to request radio resources in the Connected Mode, expediting the transition from the Dormant State in the Connected Mode. 4.6 3GPP LTE user equipment states and state transitions 4.6.1 Acquisition of System Information System information in 3GPP LTE is divided into the Master Information Block (MIB) and a number of System Information Blocks (SIBs). The MIB includes a limited number of most essential and most frequently transmitted parameters that are needed to acquire other information from the cell and is transmitted in the broadcast channel [19]. The SIBs other than System Information Block Typel are carried in System Information (SI) messages and mapping of SIBs to SI messages is flexibly con- figurable by the scheduling information list included in System Information Block Type 1 with the following restrictions: (1) each SIB is contained only in a single SI message; (2) only SIBs having the same scheduling requirement (periodicity) can be mapped to the same SI message; and (3) System Information Block Type 2 is always mapped to the SI message that corresponds to the first entry in the list of SI messages in the scheduling information list. There may be multiple SI messages transmitted with the same periodicity. System Information Block Type 1 and all SI messages are transmitted on the downlink shared channel [17]. The change of system information (other than for ETWS) only occurs at specific radio frames. The system information may be transmitted a number of times with the same content within a modification period, as defined by its scheduling. When the network changes some of the system information, it notifies the UEs about this change. In the next modification period, the network transmits the updated system information, as illustrated in Figure 4-28 where different colors indicate different system information