Communication device, communication method, and program

A first terminal device configured to perform wireless communication, the first terminal device comprising:

• circuitry configured to:
• receive Downlink Control Information (DCI) on a Physical Downlink Control Channel (PDCCH) from a base station device, the DCI including time resource information and frequency resource information, the time resource information and frequency resource information indicating one or more resources for a Physical Sidelink Control Channel (PSCCH) for transmitting Sidelink Control Information (SCI) and a Physical Sidelink Shared Channel (PSSCH) for transmitting data to a second terminal device in a resource pool;
• transmit, based on the time resource information and frequency resource information, the PSSCH scheduled by the SCI included in the PSCCH to the second terminal device after waiting a predetermined time for PSSCH preparation;
• and
• receive an ACK/NACK response to the PSSCH from the second terminal device, the ACK/NACK response to the PSSCH being transmitted in a channel for a sidelink ACK/NACK in the resource pool after waiting a gap time for the channel for the sidelink ACK/NACK,
• wherein one or more resources for the PSCCH and the PSSCH, and a resource for the channel for the sidelink ACK/NACK, are associated each other.

A method for a base station device, the method comprising:

• performing wireless communication;
• transmitting Downlink Control Information (DCI) on a Physical Downlink Control Channel (PDCCH) to a first terminal device among the plurality of terminal devices, the DCI including time resource information and frequency resource information, the time resource information and frequency resource information indicating one or more resources for a Physical Sidelink Control Channel (PSCCH) for transmitting Sidelink Control Information (SCI) and a Physical Sidelink Shared Channel (PSSCH) for transmitting data in communication between a plurality of terminal devices in a resource pool,
• wherein time resource information and frequency resource information are used by the first terminal device to transmit the PSSCH scheduled by the SCI included in the PSCCH to a second terminal device different from the first terminal device after waiting a predetermined time for PSSCH preparation,
• wherein an ACK/NACK response to the PSSCH is transmitted in a channel for a sidelink ACK/NACK in the resource pool from the second terminal device to the first terminal device after waiting a gap time for the channel for the sidelink ACK/NACK, and
• wherein one or more resources for the PSCCH and the PSSCH, and a resource for the channel for the sidelink ACK/NACK, are associated each other.

A method for a first terminal device, the method comprising:

• performing wireless communication;
• receiving Downlink Control Information (DCI) on a Physical Downlink Control Channel (PDCCH) from a base station device, the DCI including time resource information and frequency resource information, the time resource information and frequency resource information indicating one or more resources for a Physical Sidelink Control Channel (PSCCH) for transmitting Sidelink Control Information (SCI) and a Physical Sidelink Shared Channel (PSSCH) for transmitting data to a second terminal device in a resource pool;
• transmitting, based on the time resource information and frequency resource information, the PSSCH scheduled by the SCI included in the PSCCH to the second terminal device after waiting a predetermined time for PSSCH preparation;
• and
• receiving an ACK/NACK response to the PSSCH from the second terminal device, the ACK/NACK response to the PSSCH being transmitted in a channel for a sidelink ACK/NACK in the resource pool after waiting a gap time for the channel for the sidelink ACK/NACK,
• wherein one or more resources for the PSCCH and the PSSCH, and a resource for the channel for the sidelink ACK/NACK, are associated each other.