Method and apparatus to receive and transmit data in a mobile communication system
View Patent ↗Data transfer method and apparatus for use in a mobile communication system are provided. Method to adjust uplink transmission timing includes receiving system information from a base station, receiving RRC message from the base station, receiving Timing Advance Command from the base station, determining N_TA and TAG for uplink timing adjustment and adjusting uplink transmission timing of the TAG according to N_TA.
1. A method by a terminal, the method comprising:
receiving, from a base station, a system information including information on a sub-carrier spacing (SCS) for Msg 3 transmission;
receiving, from the base station, a control message including information on a SCS of uplink bandwidth (UL BWP) part for secondary cell;
receiving, from the base station, Timing Advance Command (TAC) including Timing Advance (TA) value;
determining whether the TAC is received in a random access response or received in a TAC medium access control (MAC) control element (CE);
determining a number to derive an amount of timing adjustment (N_TA) using a 1 st method if the TAC is received in the random access response; and
determining N_TA using a 2 nd method if the TAC is received in the TAC MAC CE,
wherein in the 1 st method N_TA is determined by the TA value in the TAC and a SCS of a specific UL BWP,
wherein in the 2 nd method N_TA is determined by the TA value in the TAC and SCSs of a specific group of UL BWPs.
2. The method of claim 1 , wherein the specific UL BWP in the 1 st method is a UL BWP where uplink transmission for Msg 3 occurs according to an uplink grant included in the random access response.
3. The method of claim 1 , wherein the specific group of UL BWPs in the 2 nd method are active UL BWPs of all the active serving cells of a Timing Advance Group (TAG) at the time when TAC is received.
4. The method of claim 1 , wherein in the 1 st method a Timing Advance Group (TAG) where the determined N_TA is applied is a TAG of a serving cell where random access is performed.
5. The method of claim 1 , wherein in the 2 nd method a Timing Advance Group (TAG) where the determined N_TA is applied is a TAG indicated by a TAG id in the received TAC MAC CE.
6. A terminal in a wireless communication system, the terminal comprising:
a transceiver configured to transmit and receive a signal; and
a controller configured to control the transceiver to:
receive, from a base station, a system information including information on a sub-carrier spacing (SCS) for Msg 3 transmission;
receive, from the base station, a control message including information on a SCS of uplink bandwidth (UL BWP) part for secondary cell;
receive, from the base station, Timing Advance Command (TAC) including Timing Advance (TA) value;
determine whether the TAC is received in a random access response or received in a TAC medium access control (MAC) control element (CE);
determine a number to derive an amount of timing adjustment (N_TA) using a 1 st method if the TAC is received in the random access response; and
determine N_TA using a 2 nd method if the TAC is received in the TAC MAC CE,
wherein in the 1 st method N_TA is determined by the TA value in the TAC and a SCS of a specific UL BWP,
wherein in the 2 nd method N_TA is determined by the TA value in the TAC and SCSs of a specific group of UL BWPs.
7. The terminal of claim 6 , wherein the specific UL BWP in the 1 st method is a UL BWP where uplink transmission for Msg 3 occurs according to an uplink grant included in the random access response.
8. The terminal of claim 6 , wherein the specific group of UL BWPs in the 2 nd method are active UL BWPs of all the active serving cells of a Timing Advance Group (TAG) at the time when TAC is received.
9. The terminal of claim 6 , wherein in the 1 st method the TAG a Timing Advance Group (TAG) where the determined N_TA is applied is a TAG of a serving cell where random access is performed.
10. The terminal of claim 6 , wherein in the 2 nd method a Timing Advance Group (TAG) where the determined N_TA is applied is a TAG indicated by a TAG id in the received TAC MAC CE.