Section: 6.1 Overview
Content: The smallest time-frequency unit for downlink transmission is denoted a resource element and is defined in clause 6.2.2. A subset of the downlink subframes in a radio frame can be configured as MBSFN subframes by higher layers. For the MBSFN region is defined as one slot of 3 ms. Except for , each MBSFN subframe is divided into a non-MBSFN region and an MBSFN region. - For subframes using , the non-MBSFN region spans the first one or two OFDM symbols in an MBSFN subframe where the length of the non-MBSFN region is given according to Clause 6.7. - For subframes using , , , or slots using , the non-MBSFN region is of zero size. - The MBSFN region in an MBSFN subframe is defined as the OFDM symbols not used for the non-MBSFN region. For an MBMS-dedicated cell, subframes where PSS/SSS/PBCH or PDSCH carrying system information are transmitted with are non-MBSFN subframes. For frame structure type 3, MBSFN configuration shall not be applied to downlink subframes in which at least one OFDM symbol is not occupied or discovery signal is transmitted. Unless otherwise specified, transmission in each downlink subframe shall use the same cyclic prefix length as used for downlink subframe #0.