Base station device, method of controlling base station device, terminal device, and method of controlling terminal device

1. A base station device, comprising:

a transceiver; and

a control circuit that:

transmits, to a terminal device based on at least one symbol included in a slot format configured in the terminal device being a symbol for performing communication other than sidelink communication, information for use by the terminal device as a symbol for performing the sidelink communication using the at least one symbol,

receives information from the terminal device,

based on the information from the terminal device satisfying a predetermined override condition, determines to change the symbol for performing the communication other than sidelink communication to the symbol for performing the sidelink communication, and

transmits, to the terminal device, information for the terminal device to change from the symbol for performing the communication other than sidelink communication to the symbol for performing the sidelink communication.

2. The base station device according to claim 1 , wherein the control circuit generates the slot format including the symbol for performing the sidelink communication, and transmits the generated slot format to the terminal device.

3. The base station device according to claim 1 , wherein the information reported from the terminal device is information on a congestion state of a channel.

4. The base station device according to claim 1 , wherein the information reported from the terminal device is information on a traffic model of the terminal device.

5. The base station device according to claim 1 , wherein the information reported from the terminal device is information on quality of service (QoS) requirement of the terminal device.

6. The base station device according to claim 1 , wherein the information reported from the terminal device is information on a communication priority of the terminal device.

7. The base station device according to claim 1 , wherein the control circuit transmits the information for use by the terminal device as the symbol for performing the sidelink communication using the at least one symbol to all terminal devices, including the terminal device, belonging to a cell managed by the base station.

8. The base station device according to claim 1 , wherein the control circuit individually transmits the information for use by the terminal device as the symbol for performing the sidelink communication using the at least one symbol to each of a plurality of terminal devices, including the terminal device, belonging to a cell managed by the base station.

9. The base station device according to claim 1 , wherein the information for use by the terminal device using the at least one symbol as the symbol for the sidelink communication is bitmap information.

10. The base station device according to claim 1 , wherein the symbol for performing the sidelink communication is a symbol for performing only the sidelink communication.

11. The base station device according to claim 1 , wherein the symbol for performing the sidelink communication is a symbol for performing sidelink communication or uplink communication.

12. The base station device according to claim 1 , wherein the symbol for performing the sidelink communication is a symbol for performing simultaneous communication of sidelink communication and uplink communication.

13. A method of communication performed by a base station device, the method comprising:

transmitting, to a terminal device based on at least one symbol included in a slot format configured in the terminal device being a symbol for performing communication other than sidelink communication, information for use by the terminal device as a symbol for performing the sidelink communication using the at least one symbol;

receiving information from the terminal device;

based on the information from the terminal device satisfying a predetermined override condition, determining to change the symbol for performing the communication other than sidelink communication to the symbol for performing the sidelink communication; and

transmitting, to the terminal device, information for the terminal device to change from the symbol for performing the communication other than sidelink communication to the symbol for performing the sidelink communication.

14. A terminal device, comprising:

a transceiver; and

a control circuit that:

receives, from a base station based on at least one symbol included in a slot format configured in the terminal device being a symbol for performing communication other than sidelink communication, information for use by the terminal device as a symbol for performing the sidelink communication using the at least one symbol;

reports information to the base station, and

based on the information reported to the base station satisfying a predetermined override condition, receives, from the base station, information for changing the symbol for performing communication other than sidelink communication to the symbol for performing the sidelink communication.

15. A method of communication performed by a terminal device, the method comprising:

receiving, from a base station based on at least one symbol included in a slot format configured in the terminal device being a symbol for performing communication other than sidelink communication, information for use by the terminal device as a symbol for performing the sidelink communication using the at least one symbol;

reporting information to the base station; and

based on the information reported to the base station satisfying a predetermined override condition, receiving, from the base station, information for changing the symbol for performing communication other than sidelink communication to the symbol for performing the sidelink communication.