number Ncell for the Physical layer Cell Identity (PCI) is equal to represents the group number and can take values ranging from 0 to 167. It is determined by the Secondary Synchronization Signal (SSS). N (2) represents the number in the group and can take values ranging from 0 to 2. The Primary Synchronization Signal (PSS) performs the following functions: - frequency synchronization; - time synchronization, at the level of the Orthogonal Frequency Division Multiplexing (OFDM) symbol, the time slot, the subframe (1 ms periodicity) and the half-frame (5 ms periodicity); - value determination for the number N 2 NG-RAN Network - Procedures The Secondary Synchronization Signal (SSS) performs the following functions: - time synchronization at the frame level (10 ms periodicity); - determination of the duplex mode: either Frequency Division Duplex (FDD) mode or Time Division Duplex (TDD) mode; - determination of the type of Cyclic Prefix (CP) to be used, normal or extended; - determination of the value of number N(1) ID . The MIB message is carried by the Physical Broadcast Channel (PBCH). The MIB is a information message that is 24 bits, which provides: - the bandwidth of the radio channel, for the downlink direction; - the System Frame Number (SFN); - the configuration of the Physical HARQ Indication Channel (PHICH); - the repetition period of the SIB1 message (System Information Block Type 1). The SIB1 message transmits the identity of the serving PLMN (PLMN ID, TA Code, Cell Id), the cell selection criteria (minimum threshold) and the radio measurement configuration to be carried out in the standby mode (RRC_IDLE). The PLMN ID allows the mobile to select the PLMN based on the priority data configured in the USIM (Universal Subscriber Identity Module). The USIM module contains a list of: - preferred PLMNs sorted in order of priority; - equivalent PLMNs (optional). The SIB2 message provides information relating to the configuration of the radio resources allocated to the physical PRACH (Physical Random Channel). Acc