Method and apparatus for determining uplink transmission timing
The present disclosure relates to a communication technique that combines a 5G communication system for supporting a data rate that is higher than that of a beyond 4G system with IoT technology, and a system thereof. The present disclosure may be applied to intelligent services on the basis of 5G communication technology and IoT related technology, such as smart home, smart building, smart city, smart car or connected car, health care, digital education, retail, security and safety related services. The present disclosure relates to a method and an apparatus for operations of a terminal and a base station to transmit an uplink signal in a communication system, and more particularly, to a method by a base station for generating timing advance information for uplink transmission of a terminal and a reception method by the terminal.
1. A method performed by a terminal in a wireless communication system, the method comprising:
receiving, from abase station, configuration information associated with a bandwidth part (BWP), wherein the configuration information includes information on a subcarrier spacing for the BWP;
receiving, from the base station, first information on a timing advance (TA) command for adjusting a current timing of an uplink transmission of the BWP;
identifying second information corresponding to the subcarrier spacing for the BWP, wherein the second information is defined based on (1024·2 −μ );
determining a timing of the uplink transmission based on the first information and the second information; and
transmitting, to the base station, an uplink signal on the BWP using the determined timing of the uplink transmission,
wherein
the subcarrier spacing for the BWP is identified by:
(2 μ ·15) kHz,
where μ is an index value determined based on the information on the subcarrier for the BWP, and
wherein the subcarrier spacing is 15 kHz in case that the index value is 0, 30 kHz in case that the index value is 1, 60 kHz in case that the index value is 2, and 120 kHz in case that the index value is 3.
2. The method of claim 1 , wherein the second information is a TA granularity which is determined by:
(1024·2 −μ ) T s ,
where T s is a time unit applied to the wireless communication system having a value of 1/480000×4096 seconds.
3. The method of claim 1 , wherein the configuration information is received through radio resource control (RRC) signaling, and
wherein the first information is transmitted through a medium access control (MAC) control element (CE).
4. The method of claim 1 , wherein the BWP includes a first BWP and a second BWP, and
wherein, in case that a first subcarrier spacing of the first BWP is different from a second subcarrier spacing of the second BWP, the second information is determined based on one of the first subcarrier spacing and the second subcarrier spacing.
5. The method of claim 4 , wherein, in case that the first subcarrier spacing is greater than the second subcarrier spacing, the second information is determined based on the first subcarrier spacing.
6. A method performed by a base station in a wireless communication system, the method comprising:
transmitting, to a terminal, configuration information associated with a bandwidth part (BWP), wherein the configuration information includes information on a subcarrier spacing for the BWP;
transmitting, to the terminal, first information on a timing advance (TA) command for adjusting a current timing of an uplink transmission of the BWP; and
receiving, from the terminal, an uplink signal on the BWP according to a timing of the uplink transmission,
wherein the timing of the uplink transmission is determined based on the first information and second information corresponding to the subcarrier spacing for the BWP, wherein the second information is defined based on (1024·2 −μ ),
wherein the subcarrier spacing for the BWP is identified by:
(2 μ ·15) kHz,
where μ is an index value determined based on the information on the subcarrier spacing for the BWP, and
wherein the subcarrier spacing is 15 kHz in case that the index value is 0, 30 kHz in case that the index value is 1, 60 kHz in case that the index value is 2, and 120 kHz in case that the index value is 3.
7. The method of claim 6 , wherein the second information is a TA granularity which is determined by:
(1024·2 −μ ) T s ,
where T s is a time unit applied to the wireless communication system having a value of
1
480000
×
4096
seconds
.
8. The method of claim 6 , wherein the configuration information is transmitted through radio resource control (RRC) signaling, and
wherein the first information is transmitted through a medium access control (MAC) control element (CE).
9. The method of claim 6 , wherein the BWP includes a first BWP and a second BWP, and
wherein, in case that a first subcarrier spacing of the first BWP is different from a second subcarrier spacing of the second BWP, the second information is determined based on one of the first subcarrier spacing and the second subcarrier spacing.
10. The method of claim 9 , wherein, in case that the first subcarrier spacing is greater than the second subcarrier spacing, the second information is determined based on the first subcarrier spacing.
11. A terminal in a wireless communication system, the terminal comprising:
a transceiver; and
a controller configured to:
control the transceiver to receive, from a base station, configuration information associated with a bandwidth part (BWP), wherein the configuration information includes information on a subcarrier spacing for the BWP,
control the transceiver to receive, from a base station, first information on a timing advance (TA) command for adjusting a current timing of an uplink transmission of the BWP,
identify second information corresponding to the subcarrier spacing for the BWP, wherein the second information is defined based on (1024·2 −μ ),
determine a timing of the uplink transmission based on the first information and the second information, and
control the transceiver to transmit, to the base station, an uplink signal on the BWP using the determined timing of the uplink transmission,
wherein the subcarrier spacing for the BWP is identified by:
(2 μ ·15) kHz,
where μ is an index value determined based on the information on the subcarrier for the BWP, and
wherein the subcarrier spacing is 15 kHz in case that the index value is 0, 30 kHz in case that the index value is 1, 60 kHz in case that the index value is 2, and 120 kHz in case that the index value is 3.
12. The terminal of claim 11 , wherein the second information is a TA granularity which is determined by:
(1024·2 −μ ) T s ,
where T s is a time unit applied to the wireless communication system having a value of
1
480000
×
4096
seconds
.
13. The terminal of claim 11 , wherein the configuration information is received through radio resource control (RRC) signaling, and
wherein the first information is transmitted through a medium access control (MAC) control element (CE).
14. The terminal of claim 11 , wherein the BWP includes a first BWP and a second BWP, and
wherein, in case that a first subcarrier spacing of the first BWP is different from a second subcarrier spacing of the second BWP, the second information is determined based on one of the first subcarrier spacing and the second subcarrier spacing.
15. The terminal of claim 14 , wherein, in case that the first subcarrier spacing is greater than the second subcarrier spacing, the second information is determined based on the first subcarrier spacing.
16. A base station in a wireless communication system, the base station comprising:
a transceiver; and
a controller configured to:
control the transceiver to transmit, to a terminal, configuration information associated with a bandwidth part (BWP), wherein the configuration information includes information on a subcarrier spacing for the BWP,
control the transceiver to transmit, to the terminal, first information on a timing advance (TA) command for adjusting a current timing of an uplink transmission of the BWP, and
control the transceiver to receive, from the terminal, an uplink signal on the BWP according to a timing of the uplink transmission,
wherein the timing of the uplink transmission is determined based on the first information and second information corresponding to the subcarrier spacing for the BWP, wherein the second information is defined based on (1024·2 −μ ),
wherein the subcarrier spacing for the BWP is identified by:
(2 μ ·15) kHz,
where μ is an index value determined based on the information on the subcarrier spacing for the BWP, and
wherein the subcarrier spacing is 15 kHz in case that the index value is 0, 30 kHz in case that the index value is 1, 60 kHz in case that the index value is 2, and 120 kHz in case that the index value is 3.
17. The base station of claim 16 , wherein the second information is a TA granularity which is determined by:
(1024·2 −μ ) T s ,
where T s is a time unit applied to the wireless communication system having a value of
1
480000
×
4096
seconds
.
18. The base station of claim 16 , wherein the configuration information is transmitted through radio resource control (RRC) signaling, and
wherein the first information is transmitted through a medium access control (MAC) control element (CE).
19. The base station of claim 16 , wherein the BWP includes a first BWP and a second BWP, and
wherein, in case that a first subcarrier spacing of the first BWP is different from a second subcarrier spacing of the second BWP, the second information is determined based on one of the first subcarrier spacing and the second subcarrier spacing.
20. The base station of claim 19 , wherein, in case that the first subcarrier spacing is greater than the second subcarrier spacing, the second information is determined based on the first subcarrier spacing.