Section: 6.6.4 Mapping to resource elements
Content: The block of complex-valued symbols for each antenna port shall - for an MBMS-dedicated cell, be transmitted during 4 consecutive radio frames fulfilling , starting in each radio frame fulfilling , and - otherwise, be transmitted during 4 consecutive radio frames, starting in each radio frame fulfilling . The block of complex-valued symbols shall be mapped in sequence starting with to resource elements constituting the core set of PBCH resource elements. The mapping to resource elements not reserved for transmission of reference signals shall be in increasing order of first the index, then the index in slot 1 in subframe 0 and finally the radio frame number. The resource-element indices are given by where resource elements reserved for reference signals shall be excluded. The mapping operation shall assume cell-specific reference signals for antenna ports 0-3 being present irrespective of the actual configuration. The UE shall assume that the resource elements assumed to be reserved for reference signals in the mapping operation above but not used for transmission of reference signal are not available for PDSCH or MPDCCH transmission. The UE shall not make any other assumptions about these resource elements. For an MBMS-dedicated cell configured with repetition, the physical broadcast channel shall be repeated as described in clause 6.6.4.1. If a cell is configured with repetition of the physical broadcast channel - symbols mapped to core resource element in slot 1 in subframe 0 within a radio frame according to the mapping operation above, and - cell-specific reference signals in OFDM symbols in slot 1 in subframe 0 within a radio frame with according to the mapping operation above shall additionally be mapped to resource elements in slot number within radio frame unless resource element is used by CSI reference signals. For frame structure type 1, , , and are given by Table 6.6.4-1. For frame structure type 2, - if , and are given by Table 6.6.4-2 and ; - if , and are given by Table 6.6.4-2 and , except that repetitions with and are not applied. For both frame structure type 1 and frame structure type 2, repetition of the physical broadcast channel is not applicable if . Resource elements already reserved or used for transmission of cell-specific reference signals in absence of repetition shall not be used for additional mapping of cell-specific reference signals. Table 6.6.4-1: Frame offset, slot and symbol number triplets for repetition of PBCH for frame structure type 1. Table 6.6.4-2: Slot and symbol number pairs for repetition of PBCH for frame structure type 2.