Section: 6.3.1 Scrambling
Content: For each codeword , the block of bits , where is the number of bits in codeword transmitted on the physical channel in one subframe/slot/subslot, shall be scrambled prior to modulation, resulting in a block of scrambled bits according to where the scrambling sequence is given by clause 7.2. The scrambling sequence generator shall be initialised at the start of each subframe, where the initialisation value of depends on the transport channel type according to where corresponds to the RNTI associated with the PDSCH transmission as described in clause 7.1 TS 36.213[ Evolved Universal Terrestrial Radio Access (E-UTRA); Physical layer procedures ]  [4]. For BL/CE UEs, the same scrambling sequence is applied per subframe to PDSCH for a given block of subframes. The subframe number of the first subframe in each block of consecutive subframes, denoted as , satisfies . For the block of subframes, the scrambling sequence generator shall be initialised with where and is the absolute subframe number of the first downlink subframe intended for PDSCH. The PDSCH transmission spans consecutive subframes including subframes that are not BL/CE DL subframes where the PDSCH transmission is postponed. For BL/CE UEs, - if the PDSCH is carrying SIB1-BR - - else if the PDSCH is carrying SI message (except for SIB1-BR) or if the PDSCH transmission is associated with P-RNTI or SC-RNTI: - for frame structure type 1 and for frame structure type 2 - otherwise - for UEs assuming CEModeA (according to the definition in Clause 12 of [4]) or configured with CEModeA - for frame structure type 1 and for frame structure type 2 for UEs assuming CEModeB (according to the definition in Clause 12 of [4]) or configured with CEModeB For PDSCH with a subframe duration, up to two codewords can be transmitted in one subframe, i.e., . In the case of single codeword transmission, is equal to zero.