Terminal device, base station device, and method
Provided is a mechanism which is capable of improving wireless link quality regarding transmission from a terminal device on the ground to a non-ground station device. A terminal device including a control unit configured to acquire information regarding a type of a base station device and control a transmission timing of a signal to the base station device on the basis of the information regarding the type of the base station device.
1. A terminal device, comprising:
a radio transceiver; and
circuitry configured to:
control the radio transceiver to receive:
System Information Block (SIB) that is broadcast from a base station device, the SIB containing satellite station related information, and
a Random Access Response (RAR) transmitted from the base station device, wherein 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 an uplink transmission timing for a satellite station 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 contained in the SIB, 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 is information for the satellite station, and
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 1 , wherein the satellite station related information includes at least one of:
information of an orbital parameter for the satellite station, or
information indicating a velocity of the satellite station.
4. The terminal device according to claim 3 , wherein the information of the orbital parameter for the satellite station includes information indicating an inclination of the satellite station.
5. 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.
6. 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:
broadcast System Information Block (SIB) containing satellite station related information to the terminal device, and
transmit 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 an uplink transmission timing 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 contained in the SIB, and the second value is TA_normal which is contained in the transmitted RAR.
7. The base station device according to claim 6 , wherein
the satellite station related information is information for the satellite station, and
the satellite station is one of same as the base station device or different from the base station device.
8. The base station device according to claim 6 , wherein the satellite station related information includes at least one of:
information of an orbital parameter for the satellite station, or
information indicating a velocity of the satellite station.
9. The base station device according to claim 8 , wherein the information of the orbital parameter for the satellite station includes information indicating an inclination of the satellite station.
10. The base station device according to claim 6 , wherein the second value is based on a position of the terminal device in a cell provided by the base station device.
11. A method of a terminal device, the method comprising:
receiving:
System Information Block (SIB) that is broadcast from a base station device, the SIB containing satellite station related information, and
a Random Access Response (RAR) transmitted from the base station device, wherein 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 an uplink transmission timing for a satellite station 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 contained in the SIB, and the second value is TA_normal which is contained in the received RAR.
12. A method of a base station device, the method comprising:
broadcasting System Information Block (SIB) containing satellite station related information to the terminal device, and
transmitting 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 an uplink transmission timing 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 contained in the SIB, and the second value is TA_normal which is contained in the transmitted RAR.