Base station, user apparatus, reference signal transmission method and signal reception method

A user apparatus that communicates with a base station in an LTE-supported wireless communication system, the user apparatus comprising:

• a first reception unit configured to receive a UE specific reference signal mapped onto resource elements consecutive in the time direction in UE specific reference signals mapped according to a predetermined pattern onto resource elements in a range enclosed by a segment in the time direction indicated by a predetermined subframe in which a synchronization signal is mapped and a segment in the frequency direction in which the synchronization signal is mapped;
• and
• a second reception unit configured to receive a physical downlink shared channel signal by using the UE specific reference signal received by the first reception unit.

A reference signal transmission method performed by a base station that communicates with a user apparatus in an LTE-supported wireless communication system, the reference signal transmission method comprising:

• generating a signal in which a UE specific reference signal is mapped according to a first pattern in which, in a range of resource elements enclosed by a segment in the time direction indicated by a predetermined subframe in which a synchronization signal is mapped and by a segment in the frequency direction in which the synchronization signal is mapped, a UE specific reference signal is mapped onto a resource element other than a resource element onto which the synchronization signal is mapped;
• and
• transmitting the generated signal.

A signal reception method performed by a user apparatus that communicates with a base station in an LTE-supported wireless communication system, the signal reception method comprising:

• receiving, in UE specific reference signals mapped according to a predetermined pattern onto resource elements in a range enclosed by a segment in the time direction indicated by a predetermined subframe in which a synchronization signal is mapped and by a segment in the frequency direction in which the synchronization signal is mapped, a UE specific reference signal mapped onto resource elements consecutive in the time direction;
• and
• receiving a physical downlink shared channel signal by using the received UE specific reference signal.