Section: 6.10.3A.1 Sequence generation
Content: For any of the antenna ports , the reference-signal sequence is defined by . For non-BL/CE UEs, the pseudo-random sequence is defined in clause 7.2. The pseudo-random sequence generator shall be initialised with at the start of each subframe where - and shall be replaced by and , respectively, for the EPDCCH - and shall be replaced by and , respectively, for the SPDCCH - , , and - is configured by higher layers. The EPDCCH/SPDCCH set to which the EPDCCH/SPDCCH associated with the demodulation reference signal belong is denoted . For BL/CE UEs, the same scrambling sequence is applied per subframe to the demodulation reference signal associated with MPDCCH 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 MPDCCH. The MPDCCH transmissions span consecutive subframes, including subframes that are not BL/CE DL subframes where the MPDCCH transmission is postponed. For BL/CE UEs, - if the MPDCCH 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. The quantities and are configured by higher layers. The MPDCCH set to which the MPDCCH associated with the demodulation reference signal belong is denoted . For an MPDCCH associated with a 2+4 PRB set as defined in [4], is used to generate the scrambling sequence for the 6 PRBs as well as for the 2 PRBs and 4 PRBs.