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, and a Random Access Response (RAR) transmitted from the base station device, the RAR corresponds to a Random Access preamble which is transmitted from the terminal device to the base station device;
determine whether or not the SIB contains satellite station related information;
on condition that the SIB doesn't contain the satellite station related information, calculate a timing advance value for controlling an uplink transmission timing based on a second value, wherein a first value is not used to calculate the timing advance; and
on condition that the SIB contains the satellite station related information, calculate the timing advance value based on addition of the first value to the 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, 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 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), 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
on condition that the SIB doesn't contain satellite station related information, a timing advance value for controlling an uplink transmission timing from the terminal device is calculated by the terminal device based on a second value, wherein a first value is not used to calculate the timing advance,
on condition that the SIB contains the satellite station related information, the timing advance value is calculated by the terminal device based on addition of the first value to the 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, wherein 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, and a Random Access Response (RAR) transmitted from the base station device, the RAR corresponds to a Random Access preamble which is transmitted from the terminal device to the base station device;
determining whether or not the SIB contains satellite station related information;
on condition that the SIB doesn't contain the satellite station related information, calculating a timing advance value for controlling an uplink transmission timing based on a second value, wherein a first value is not used to calculate the timing advance; and
on condition that the SIB contains the satellite station related information, calculating the timing advance value based on addition of the first value to the 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 that performs communication with a terminal device, the method comprising:
broadcasting System Information Block (SIB); 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
on condition that the SIB doesn't contain satellite station related information, a timing advance value for controlling an uplink transmission timing from the terminal device is calculated by the terminal device based on a second value, wherein a first value is not used to calculate the timing advance,
on condition that the SIB contains the satellite station related information, the timing advance value is calculated by the terminal device based on addition of the first value to the 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.