System Information Distribution Clause Samples

System Information Distribution. System information in LTE is acquired through broadcasting a certain amount of information in each cell. In LTE is structured by means of System Information Blocks (SIBs), each of which contains a set of functionally-related parameters. The SIB types that have been defined include:  The Master Information Block (MIB), which includes a limited number of the most frequently transmitted parameters which are essential for a UE’s initial access to the network.  System Information Block Type 1 (SIB1), which contains parameters needed to determine if a cell is suitable for cell selection, as well as information about the time-domain scheduling of the other SIBs.  System Information Block Type 2 (SIB2), which includes common and shared channel information.  SIB3–SIB8, which include parameters used to control intra-frequency, inter-frequency and inter-RAT cell reselection.  SIB9, which is used to signal the name of a Home eNodeB (HeNB).  SIB10–SIB12, which includes the Earthquake and Tsunami Warning Service (ETWS) notifications and Commercial Mobile Alert System (CMAS) warning messages.  SIB13, which includes MBMS related control information.  SIB14, which is used to configure Extended Access Class Barring.  SIB15, which is used for convey MBMS mobility related information.  SIB16, which is used to convey GPS-related information. This list of System Information Block Types has been expanding over the years and is expected to keep increasing during the upcoming 3GPP releases. Information transmission presented afore is considered a key aspect. First of all, it is important to mention that this information is constantly broadcasted, but depending on the type of information, different periodicities are assumed. In LTE the time-domain scheduling of the MIB and SIB1 messages is fixed with periodicities of 40 ms and 80 ms. Furthermore, for the MIB the transmission is repeated four times during each period, i.e., once every 10 ms. SIB1 is also repeated four times within its period, i.e., every 20 ms, but with different redundancy version for each transmission. The time-domain scheduling of the SI messages (for the other SIBs) is flexible: each SI message is transmitted in a predefined periodic time window, while physical layer control signaling indicates in which subframes within this window the SI is actually scheduled. The scheduling windows of the different SI messages (referred to as SI-windows) are consecutive (i.e. there are neither overlaps nor gaps betwe...