Section: 6.4 Physical downlink shared channel
Content: The physical downlink shared channel shall be processed and mapped to resource elements as described in clause 6.3 with the following additions and exceptions: - In resource blocks in which UE-specific reference signals are not transmitted, the PDSCH shall be transmitted on the same set of antenna ports as the PBCH, which is one of , , or . - In resource blocks in which UE-specific reference signals are transmitted, the PDSCH shall be transmitted on antenna port(s) ,,, , , , , or the antenna ports listed in Table 6.3.4.4-1, where is the number of layers used for transmission of the PDSCH. - If PDSCH is transmitted in MBSFN subframes as defined in TS 36.213[ Evolved Universal Terrestrial Radio Access (E-UTRA); Physical layer procedures ]  [4], the PDSCH shall be transmitted on one or several of antenna port(s) or on the antenna ports indicated in Table 6.3.4.4-1, where is the number of layers used for transmission of the PDSCH. - PDSCH is not mapped to resource elements used for UE-specific reference signals associated with PDSCH - In mapping to resource elements, the same positions of the cell-specifc reference shall be assumed for all antenna ports on which the PDSCH is transmitted and the positions of the cell-specific reference signals are given by clause 6.10.1.2 with the number of antenna ports and the frequency shift of the cell-specific reference signals derived as described in clause 6.10.1.2, unless indicated otherwise in clause 7.1.9 in TS 36.213[ Evolved Universal Terrestrial Radio Access (E-UTRA); Physical layer procedures ]  [4], - if one set of parameters for cell-specific reference signal positions are provided by clause 7.1.9 in TS 36.213[ Evolved Universal Terrestrial Radio Access (E-UTRA); Physical layer procedures ]  [4], the values of these parameters are used for all antenna ports whereon the PDSCH is transmitted in the resource blocks indicated by the relevant DCI. - if two sets of parameters for cell-specific reference signal positions are provided by clause 7.1.9 in TS 36.213[ Evolved Universal Terrestrial Radio Access (E-UTRA); Physical layer procedures ]  [4], the first set of parameters are used for the set of antenna ports associated with PDSCH codeword while the second set of parameters are used for the set of antenna ports associated with PDSCH codeword , according to codeword-to-layer mapping and layer-to-port mapping in Clause 6.3.3.2 and Clause 6.3.4.4, respectively. - If the DCI associated with the PDSCH uses the C-RNTI or semi-persistent C-RNTI, PDSCH modulation symbols on the indicated antenna ports are not mapped to resource elements assumed by the UE to be used for transmission of: - zero-power CSI reference signals, where the positions of the CSI reference signals assumed for each antenna port are given by clause 6.10.5.2. The configuration for zero power CSI reference signals is - obtained as described in clause 6.10.5.2 and used for all antenna ports whereon the PDSCH is transmitted, unless indicated otherwise in clause 7.1.9 in TS 36.213[ Evolved Universal Terrestrial Radio Access (E-UTRA); Physical layer procedures ]  [4] - if one set of parameters for zero power CSI reference signal configuration is provided by clause 7.1.9 in TS 36.213[ Evolved Universal Terrestrial Radio Access (E-UTRA); Physical layer procedures ]  [4], the values of these parameters are used for all antenna ports on which the PDSCH is transmitted in the resource blocks indicated by the corresponding DCI scheduling the PDSCH, and - if two sets of parameters for zero power CSI reference signal configuration are provided by clause 7.1.9 in TS 36.213[ Evolved Universal Terrestrial Radio Access (E-UTRA); Physical layer procedures ]  [4], the first set of parameters are used for the set of antenna ports associated with PDSCH codeword while the second set of parameters are used for the set of antenna ports associated with PDSCH codeword , according to codeword-to-layer mapping and layer-to-port mapping in Clause 6.3.3.2 and Clause 6.3.4.4, respectively. - obtained by higher-layer configuration of up to five reserved CSI-RS resources as part of the discovery signal configuration following the procedure for zero-power CSI-RS in clause 6.10.5.2. - non-zero-power CSI reference signals for CSI reporting, except for non-zero power CSI reference signals configured by csi-RS-ConfigNZP-ApList, where the positions of the non-zero-power CSI reference signals for CSI reporting are given by clause 6.10.5.2. The configuration for non-zero power CSI reference signals is obtained as described in clause 6.10.5.2. - PDSCH is not mapped to any physical resource-block pair(s) carrying an EPDCCH associated with the PDSCH. - PDSCH with subframe duration on antenna port 7, 8, 9, 10, 11, 12, 13 or 14 is not mapped to any physical resource-block pair(s) carrying PBCH or synchronization signals. - Frame structure type 1, PDSCH on antenna port 5 is not mapped to any physical resource-block pair(s) carrying PBCH or synchronization signals. - Frame structure type 2, PDSCH on antenna port 5 is not mapped to any physical resource-block pair(s) carrying PBCH. - For frame structure type 1 and 2, the index in the first slot in a subframe fulfils where is given by clause 7.1.6.4 of TS 36.213[ Evolved Universal Terrestrial Radio Access (E-UTRA); Physical layer procedures ]  [4]. - For frame structure type 3, - if the higher layer parameter subframeStartPosition indicates 's07' and the downlink transmission starts in the second slot of a subframe - the index in the second slot in a subframe fulfils where is given by clause 7.1.6.4 of TS 36.213[ Evolved Universal Terrestrial Radio Access (E-UTRA); Physical layer procedures ]  [4], - otherwise - the index in the first slot in a subframe fulfils where is given by clause 7.1.6.4 of TS 36.213[ Evolved Universal Terrestrial Radio Access (E-UTRA); Physical layer procedures ]  [4], - In mapping to resource elements, if the DCI associated with the PDSCH uses the C-RNTI or semi-persistent C-RNTI, and transmit diversity according to clause 6.3.4.3 is used, and if the higher-layer parameter semiOpenLoop is not set and if the DCI associated with the PDSCH is not of format 7, resource elements in an OFDM symbol assumed by the UE to contain CSI-RS shall be used in the mapping if and only if all of the following criteria are fulfilled: - there is an even number of resource elements for the OFDM symbol in each resource block assigned for transmission, and - the complex-valued symbols and , where is an even number, can be mapped to resource elements and in the same OFDM symbol with . - In mapping to resource elements, if the DCI associated with the PDSCH uses C-RNTI or semi-persistent C-RNTI and if the higher-layer parameter semiOpenLoop is set for subframe PDSCH or the higher-layer parameter semiOpenLoop-STTI is set for slot/subslot PDSCH or if the DCI associated with the PDSCH is of format 7 and transmit diversity according to clause 6.3.4.3 is used, a pair of resource elements , shall be used in the mapping if and only if - the complex-valued symbols and can be mapped to resource elements and in the same OFDM symbol and the same PRB with , where is an even number and starts from 0 at the lowest subcarrier of the PRB.