ge is restricted SO that it points to the same frequency locations, thus the CRS cyclic shift in the frequency domain is known to the UE. 762 Chapter 6 Subframe 0 Slot 0 Slot 1 01234560123456 34 bits Channel coding 1600 bits Modulation 800 symbols (QPSK modulation) LTE CRS LTE PDCCH NPBCH NRS Port 0 NRS Port 1 Cinit Cinit Cinit Reinitialization Reinitialization Reinitialization Cinit==NN Subframe 0 112345670 Modulation S,(1)),S,(2),...,S,(8) S2(1),S(2) S2(8) Sg(1),Sg(2),...,S. (8) NPBCH subblock (1) repeats NPBCH subblock (2) repeats NPBCH subblock (8) repeats over 8 \frames over 8 frames over 8 frames bb(0),b,(1),....b.(n) bo(n+1),bo(n1+2),...,bo(n2) bo(n7+1),bo(n7+2),,bo(ng) One MIB transmission Figure 6.12 Processing and resource mapping of NPBCH [2,3,25]. Table 6.2: MIB and SIB specified for NB-loT [8]. Message Content MIB-NB Essential information required to receive further system information SIB1-NB Cell access and selection, other SIB scheduling SIB2-NB Radio resource configuration information SIB3-NB Cell reselection information for intra-frequency, inter-frequency SIB4-NB Neighbor cell-related information relevant for intra-frequency cell reselection SIB5-NB Neighbor cell-related information relevant for inter-frequency cell reselection SIB14-NB Access barring parameters SIB16-NB Information related to GPS time and coordinated universal time (UTC) Internet of Things 6.3.6 Narrowband Physical Downlink Control Channel In NB-IoT, the downlink control information (DCI) is carried by the narrowband physical downlink control channel (NPDCCH). The basic resource allocation unit for NPDCCH is defined as narrowband control channel element (NCCE), which is the basic resource unit (RU) allocated for DCI transport. NPDCCH carries scheduling information for downlink and uplink data channels and further carries HARQ ACK/NACK information for the uplink data channel as well as paging indication and random-access response (RAR) scheduling information. There are two different formats for NPDCCH; that is, Format 0 and Form