Terminal device, base station device, and method

1. A terminal device, comprising:

a radio transceiver; and

circuitry configured to:

control the radio transceiver to receive:

satellite station related information, and

a Random Access Response (RAR) transmitted from a base station device, the RAR corresponds to a Random Access preamble which is transmitted from the terminal device to the base station device; and

calculate a timing advance value for controlling a transmission timing of a signal to the base station device based on addition of a first value to a second value, wherein

the first value is TA_satellite which is computed based on the satellite station related information and the second value is TA_normal which is contained in the received RAR.

2. The terminal device according to claim 1 , wherein the satellite station related information includes at least one of:

information of an orbital parameter for a satellite station, or

information indicating a velocity of the satellite station, wherein the satellite station is one of same as the base station device or different from the base station device.

3. The terminal device according to claim 2 , wherein the information of the orbital parameter for the satellite station includes information indicating an inclination of the satellite station.

4. The terminal device according to claim 1 , wherein the second value is based on a position of the terminal device in a cell provided by the base station device.

5. The terminal device according to claim 1 , wherein

a maximum value of a range of the second value corresponds to a distance obtained by subtracting an altitude of the base station device from a specific distance, and

the specific distance is between the base station device and an edge of a cell provided by the base station device.

6. The terminal device according to claim 1 , wherein

the circuitry is further configured to switch a range of the timing advance value based on a maximum propagation delay, and

the maximum propagation delay is based on an altitude of the base station device.

7. The terminal device according to claim 6 , wherein the range of the timing advance value is switched by switching of a maximum value of the timing advance value.

8. The terminal device according to claim 6 , wherein the range of the timing advance value is switched by switching of an adjusted particle size of the timing advance value.

9. The terminal device according to claim 6 , wherein

the circuitry is further configured to switch the range of the timing advance value based on a minimum propagation delay, and

the minimum propagation delay is based on the altitude of the base station device.

10. The terminal device according to claim 1 , wherein

the circuitry is further configured to replace a range of the timing advance value with a specific range, and

the specific range is based on an altitude of the base station device.

11. The terminal device according to claim 1 , wherein

the circuitry is further configured to calculate the timing advance value based on a specific value, and

the specific value is based on an altitude of the base station device.

12. The terminal device according to claim 1 , wherein the circuitry is further configured to control a cyclic prefix (CP) length based on a type of the base station device.

13. The terminal device according to claim 1 , wherein a notification of the satellite station related information is made using system information.

14. A base station device which performs communication with a terminal device, the base station device comprising:

a radio transceiver; and

circuitry configured to control the radio transceiver to transmit:

satellite station related information to the terminal device, and

a Random Access Response (RAR) corresponding to a Random Access preamble which is transmitted from the terminal device to the base station device, wherein

a timing advance value for controlling a transmission timing of a signal from the terminal device is calculated by the terminal device based on addition of a first value to a second value, and

the first value is TA_satellite which is computed based on the satellite station related information and the second value is TA_normal which is contained in the transmitted RAR.

15. The base station device according to claim 14 , wherein the circuitry is further configured to calculate the second value based on a position of the terminal device in a cell provided by the base station device.

16. A method of a terminal device, the method comprising:

receiving:

satellite station related information, and

a Random Access Response (RAR) transmitted from a base station device, the RAR corresponds to a Random Access preamble which is transmitted from the terminal device to the base station device; and

calculating a timing advance value for controlling a transmission timing of a signal to the base station device based on addition of a first value to a second value, wherein

the first value is TA_satellite which is computed based on the satellite station related information and the second value is TA_normal which is contained in the received RAR.

17. A method of a base station device, the method comprising:

transmitting:

satellite station related information to the terminal device, and

a Random Access Response (RAR) corresponding to a Random Access preamble which is transmitted from the terminal device to the base station device, wherein

a timing advance value for controlling a transmission timing of a signal from the terminal device is calculated by the terminal device based on addition of a first value to a second value, and

the first value is TA_satellite which is computed based on the satellite station related information and the second value is TA_normal which is contained in the transmitted RAR.