Section: 6.11A Discovery signal
Content: A discovery signal occasion for a cell consists of a period with a duration of - one to five consecutive subframes for frame structure type 1 - two to five consecutive subframes for frame structure type 2 - 12 OFDM symbols within one non-empty subframe for frame structure type 3 where the UE in the downlink subframes may assume presence of a discovery signal consisting of - cell-specific reference signals on antenna port 0 in all downlink subframes and in DwPTS of all special subframes in the period for frame structure type 1 and 2 - cell specific reference signals on antenna port 0 when higher layer parameters indicate only one configured antenna port for cell specific reference signals for a serving cell using frame structure type 3 - cell specific reference signals on antenna port 0 and antenna port 1 when higher layer parameters indicate at least two configured antenna ports for cell specific reference signals for a serving cell using frame structure type 3 - cell specific reference signals on antenna port 0 and antenna port 1 when higher layer configured parameter presenceAntennaPort1 is signalled to be 1, for a neighbour cell when using frame structure type 3 - primary synchronization signal in the first subframe of the period for frame structure types 1 and 3 or the second subframe of the period for frame structure type 2, - secondary synchronization signal in the first subframe of the period, and - non-zero-power CSI reference signals in zero or more subframes in the period. The configuration of non-zero-power CSI reference signals part of the discovery signal is obtained as described in clause 6.10.5.2 For frame structures 1 and 2 the UE may assume a discovery signal occasion once every dmtc-Periodicity. For frame structure type 3, the UE may assume a discovery signal occasion may occur in any subframe within the discovery signals measurement timing configuration in clause 5.5.2.10 of [9]. For frame structure type 3, simultaneous transmission of a discovery signal and PDSCH/PDCCH/EPDCCH may occur in subframes 0 and 5 only. For frame structure type 3, the UE may assume that a discovery signal occasion occurs in the first subframe containing a primary synchronization signal, secondary synchronization signal and cell-specific reference signals within the discovery measurement timing configuration in clause 5.5.2.10 of [9].