Terminal device, base station apparatus and communication method

A base station apparatus that communicates with a terminal device, the base station apparatus comprising:

• generation circuitry configured to generate a discovery signal for measurement of (a) reference signal received power (RSRP) and/or (b) received signal strength indicator (RSSI), wherein the discovery signal includes cell-specific reference signals present in downlink subframes and in Downlink Pilot Time Slots (DwPTSs) of special subframes, a primary synchronization signal present in a prescribed subframe, a secondary synchronization signal present in a first subframe, and one or more Channel State Information (CSI) reference signals during a period of consecutive subframes in a predetermined cell;
• and
• transmission circuitry configured to transmit the discovery signal,
• wherein the transmission circuitry is further configured to transmit Radio Resource Control (RRC) signaling which indicates, for each of the one or more CSI reference signals, (a) a physical cell ID of the predetermined cell and (b) a subframe offset between (i) the secondary synchronization signal and (ii) the each of the one or more CSI reference signals.

A method performed by a terminal device that communicates with a base station apparatus, the method comprising:

• measuring reference signal received power (RSRP) and/or received signal strength indicator (RSSI), based on a discovery signal which includes cell-specific reference signals present in downlink subframes and in Downlink Pilot Time Slots (DwPTSs) of special subframes, a primary synchronization signal present in a prescribed subframe, a secondary synchronization signal present in a first subframe, and one or more Channel State information (CSI) reference signals during a period of consecutive subframes in a predetermined cell;
• receiving the discovery signal;
• and
• receiving Radio Resource Control (RRC) signaling which indicates, for each of the one or more CSI reference signals, (a) a physical cell ID of the predetermined cell and (b) a subframe offset between (i) the secondary synchronization signal and (iii) the each of the one or more CSI reference signals.

A method performed by a base station apparatus that communicates with a terminal device, the method comprising:

• generating a discovery signal for measurement of (a) reference signal received power (RSRP) and/or (b) received signal strength indicator (RSSI), wherein the discovery signal includes cell-specific reference signals present in downlink subframes and in Downlink Pilot Time Slots (DwPTSs) of special subframes, a primary synchronization signal present in a prescribed subframe, a secondary synchronization signal present in a first subframe, and one or more Channel State Information (CSI) reference signals during a period of consecutive subframes in a predetermined cell;
• transmitting the discovery signal;
• and
• transmitting Radio Resource Control (RRC) signaling which indicates, for each of the one or more CSI reference signals, (a) a physical cell ID of the predetermined cell and (b) a subframe offset between (i) the secondary synchronization signal and (ii) the each of the one or more CSI reference signals.