Communication device, communication method, and program
[Object] To achieve communication between terminal devices in a more preferred aspect even in a situation in which wireless access technologies in which definition of resources is different are multiplexed in a communication system in which a base station device and terminal devices communicate with each other. [Solution] A communication device includes: a communication unit configured to perform wireless communication; a control unit configured to allocate a resource to each of a first channel for transmitting control information and a second channel for transmitting data in communication between a plurality of terminal devices; and a notification unit configured to notify at least any terminal device among the plurality of terminal devices of information regarding the resource.
1. A base station device configured to perform wireless communication and comprising:
circuitry configured to transmit 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.
2. The communication device according to claim 1 ,
wherein the circuitry is further configured to allocate the resource for the channel for the sidelink ACK/NACK used by the second terminal device to notify the first terminal device of a ACK/NACK response to the PSSCH, such that the PSCCH, the PSSCH and the channel for the sidelink ACK/NACK are transmitted and received during a series of chronologically continuous periods.
3. The base station device according to claim 2 ,
wherein the circuitry is further configured to
allocate a resource to a Physical Uplink Shared Channel (PUSCH) for receiving data from the first terminal device, and
transmit, to at least the first terminal device among the plurality of terminal devices, of information regarding the resource to the PUSCH.
4. The base station device according to claim 2 ,
wherein the first terminal device is the terminal device located within a range of the wireless communication, and
the second terminal device is the terminal device located outside of the range of the wireless communication.
5. The base station device according to claim 2 ,
wherein the circuitry is further configured to:
allocate the one or more resources for the PSCCH and the PSSCH while targeting at least a part of a frequency band during the series of chronologically continuous periods, and
notify at least any terminal device among the plurality of terminal devices of information regarding the frequency band in which the one or more resources for the PSCCH and the PSSCH are allocated.
6. The base station device according to claim 5 ,
wherein the circuitry is further configured to:
allocate the one or more resources for the PSCCH and the PSSCH in units of resource blocks while targeting the frequency band, and
notify at least any terminal device among the plurality of terminal devices of information indicating each of a start position of the resource block in a frequency direction, an end position of the resource block, and the number of continuous resource blocks to which the one or more resources for the PSCCH and the PSSCH are allocated, as the information regarding the frequency band.
7. 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.
8. 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.
9. 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.