Method and apparatus to adjust uplink timing in communication system
The disclosure relates to a pre-5 th -generation (5G) or 5G communication system to be provided for supporting higher data rates beyond a 4 th generation (4G) communication system such as long term evolution (LTE). A method performed by a terminal in a communication system is provided. The method includes receiving, from a base station, a common timing advance (TA) controlled by the base station, estimating a terminal-specific TA used for compensating for link delay between the base station and the terminal, and determining a TA of the terminal based on the common TA and the terminal-specific TA.
1. A method performed by a user equipment (UE) in a wireless communication system, the method comprising:
receiving, from a base station, system information block (SIB) including information associated with a timing advance (TA);
identifying a first TA based on the information associated with the TA;
determining a second TA based on a position of the UE and a position of a serving satellite to compensate for link delay;
determining a third TA for transmission from the UE based on the first TA and the second TA;
receiving, from the base station, information for TA reporting, the information including offset for the TA reporting; and
transmitting, to the base station, a TA report related to the third TA.
2. The method of claim 1 , wherein the first TA is a TA which is commonly applied to a plurality of UEs.
3. The method of claim 1 , wherein the first TA is received via a radio resource control (RRC) message.
4. The method of claim 1 , wherein the information for the TA reporting is received via at least one of downlink control information (DCI), a medium access control (MAC) control element (CE), or a radio resource control (RRC) message.
5. A method performed by a base station in a wireless communication system, the method comprising:
transmitting, to a user equipment (UE), system information block (SIB) including information associated with a timing advance (TA);
receiving an uplink signal from the UE at time at which a third TA of the UE is applied;
transmitting, to the UE, information for TA reporting, the information including offset for the TA reporting; and
receiving, from the UE, a TA report related to the third TA,
wherein the third TA for transmission from the UE is determined based on a first TA and a second TA,
wherein the first TA is identified based on the information associated with the TA, and
wherein the second TA is used to compensate for link delay, and the second TA is determined based on a location of the UE and a location of a serving satellite.
6. The method of claim 5 , wherein the first TA is a TA which is commonly applied to a plurality of UEs.
7. The method of claim 5 , wherein the first TA is transmitted via a radio resource control (RRC) message.
8. The method of claim 5 , wherein the information for the TA reporting is received via at least one of downlink control information (DCI), a medium access control (MAC) control element (CE), or a radio resource control (RRC) message.
9. A user equipment (UE) in a wireless communication system, the UE comprising:
a transceiver; and
a processor coupled with the transceiver and configured to control to:
receive, from a base station, system information block (SIB) including information associated with a timing advance (TA),
identify a first TA based on the information associated with the TA,
determine a second TA based on a location of the UE and a location of a serving satellite to compensate for link delay,
determine a third TA for transmission from the UE based on the first TA and the second TA,
receive, from the base station, information for TA reporting, the information including offset for the TA reporting, and
transmit, to the base station, a TA report related to the third TA.
10. The UE of claim 9 , wherein the first TA is a TA which is commonly applied to a plurality of UEs.
11. The UE of claim 9 , wherein the first TA is received via a radio resource control (RRC) message.
12. The UE of claimer 9 , wherein the information for the TA reporting is received via at least one of downlink control information (DCI), a medium access control (MAC) control element (CE), or a radio resource control (RRC) message.
13. A base station in a wireless communication system, the base station comprising:
a transceiver; and
a processor coupled with the transceiver and configured to control to:
transmit, to a user equipment (UE), system information block (SIB) including information associated with a timing advance (TA),
receive, from the UE, an uplink signal at time at which a third TA of the UE is applied,
transmit, to the UE, information for TA reporting, the information including offset for the TA reporting, and
receive, from the UE, a TA report related to the third TA,
wherein the third TA for transmission from the UE is determined based on a first TA and a second TA,
wherein the first TA is identified based on the information associated with the TA, and
wherein the second TA is used to compensate for link delay, and the second TA is determined based on a location of the UE and a location of a serving satellite.
14. The base station of claim 13 , wherein the first TA is a TA which is commonly applied to a plurality of UEs.
15. The base station of claim 13 , wherein the first TA is transmitted via a radio resource control (RRC) message.
16. The base station of claim 13 , wherein the information for the TA reporting is received via at least one of downlink control information (DCI), a medium access control (MAC) control element (CE), or a radio resource control (RRC) message.