Wireless communication device and wireless communication method

A communication method comprising:

• generating a CSI reference signal for channel measurement;
• mapping the generated CSI reference signal only to at least one OFDM symbol in a subframe other than subframes that are capable of acting as MBSFN (Multimedia Broadcast multicast service Single Frequency Network) subframe, the subframes capable of being used for MBSFN subframes including at least one subframe being used for MBSFN and another subframe not being used for MBSFN, each subframe comprising a plurality of OFDM symbols;
• and
• transmitting a signal including the mapped CSI reference signal.

A terminal apparatus comprising:

• a receiving section configured to receive a signal including a CSI reference signal for channel measurement;
• a separating section configured to separate the CSI reference signal from the received signal, the CSI reference signal being mapped only to at least one OFDM symbol in a subframe other than subframes that are capable of acting as MBSFN (Multimedia Broadcast multicast service Single Frequency Network) subframes, the subframes capable of being used for MBSFN subframes including at least one subframe being used for MBSFN and another subframe not being used for MBSFN, each subframe comprising a plurality of OFDM symbols;
• an estimating section configured to estimate a channel state using the separated CSI reference signal;
• and
• a transmitting section configured to transmit CQI information regarding the estimated channel state.

A communication method comprising:

• receiving a signal including a CSI reference signal for channel measurement;
• separating the CSI reference signal from the received signal, the CSI reference signal being mapped only to at least one OFDM symbol in a subframe other than subframes that are capable of acting as MBSFN (Multimedia Broadcast multicast service Single Frequency Network) subframes, the subframes capable of being used for MBSFN subframes including at least one subframe being used for MBSFN and another subframe not being used for MBSFN, each subframe comprising a plurality of OFDM symbols;
• estimating a channel state using the separated CSI reference signal;
• and
• transmitting CQI information regarding the estimated channel state.

An integrated circuit for controlling a process comprising:

• generating a CSI reference signal for channel measurement;
• mapping the generated CSI reference signal only to at least one OFDM symbol in a subframe other than subframes that are capable of acting as MBSFN (Multimedia Broadcast multicast service Single Frequency Network) subframes, the subframes capable of being used for MBSFN subframes including at least one subframe being used for MBSFN and another subframe not being used for MBSFN, each subframe comprising a plurality of OFDM symbols;
• and
• transmitting a signal including the mapped CSI reference signal.

An integrated circuit for controlling a process comprising:

• receiving a signal including a CSI reference signal for channel measurement;
• separating the CSI reference signal from the received signal, the CSI reference signal being mapped only to at least one OFDM symbol in a subframe other than subframes that are capable of acting as MBSFN (Multimedia Broadcast multicast service Single Frequency Network) subframes, the subframes capable of being used for MBSFN subframes including at least one subframe being used for MBSFN and another subframe not being used for MBSFN, each subframe comprising a plurality of OFDM symbols;
• estimating a channel state using the separated CSI reference signal;
• and
• transmitting CQI information regarding the estimated channel state.