Terminal apparatus, base station apparatus, communication method, and program

A base station apparatus comprising:

• a receiver configured to receive, from a first terminal apparatus, a signal addressed to a second terminal apparatus;
• and
• a transmitter configured to
• transmit no acknowledgment to the first terminal apparatus and transmit a signal addressed to the second terminal apparatus, based on the signal addressed to the second terminal apparatus that has been successfully received, in a case that the signal addressed to the second terminal apparatus has been successfully received by the receiver, and
• transmit a negative acknowledgment to the first terminal apparatus in a case that the signal addressed to the second terminal apparatus has not been successfully received by the receiver.

A communication method for a terminal apparatus for performing radio communication with another terminal apparatus via a base station apparatus, the communication method comprising:

• a first step of transmitting, to the base station apparatus, a signal of data addressed to the other terminal apparatus;
• a second step of receiving a signal from the base station apparatus to the other terminal apparatus;
• and
• a third step of determining whether the base station apparatus has successfully received the signal of the data, addressed to the other terminal apparatus, that is transmitted in the first step, by using the signal from the base station apparatus to the other terminal apparatus received in the second step.