Method and apparatus for handling system information request in wireless communication system
The present disclosure relates to a communication method and system for converging a 5th-Generation (5G) communication system for supporting higher data rates beyond a 4th-Generation (4G) system with a technology for Internet of Things (IOT). The present disclosure may be applied to intelligent services based on the 5G communication technology and the IoT-related technology, such as smart home, smart building, smart city, smart car, connected car, health care, digital education, smart retail, security and safety services. The present disclosure provides method and apparatus for managing system information in a wireless communication system.
1. A method performed by a terminal in a wireless communication system, the method comprising:
receiving, from a first base station, a radio resource control (RRC) reconfiguration message including a dedicated system information block (SIB) 1-Delivery and a reconfigurationWithSync in a spCellConfig of a master cell group (MCG);
identifying whether the RRC reconfiguration message is associated with the MCG and includes the dedicated SIB1-Delivery and the reconfigurationWithSync; and
in case that the RRC reconfiguration message is associated with the MCG and includes the dedicated SIB1-Delivery and the reconfigurationWithSync, transmitting, to a second base station, a dedicated SIB request message for an SIB after a random access procedure to the second base station is completed.
2. The method of claim 1 ,
wherein the reconfigurationWithSync includes information on a timer for a corresponding special cell (SpCell).
3. The method of claim 1 ,
wherein the dedicated SIB1-Delivery includes scheduling information associated with system information (SI), and wherein the SIB is required by the terminal in an RRC connected state.
4. The method of claim 3 , further comprising:
identifying that an active bandwidth part (BWP) is not configured with a common search space,
wherein the dedicated SIB request message is transmitted based on the scheduling information.
5. The method of claim 3 , further comprising:
identifying that an active bandwidth part (BWP) is configured with a common search space; and
identifying that a system information broadcast status is set to not broadcasting based on the scheduling information,
wherein the dedicated SIB request message is transmitted, based on the active BWP being configured with the common search space and the system information broadcast status being set to not broadcasting.
6. The method of claim 1 ,
wherein the SIB comprises at least one of SIB 12 or SIB 14.
7. A method performed by a second base station associated with a target special cell (SpCell) in a wireless communication system, the method comprising:
performing a random access procedure with a terminal; and
receiving, from the terminal, a dedicated system information block (SIB) request message for an SIB,
wherein a radio resource control (RRC) reconfiguration message including a dedicated SIB1-Delivery and a reconfigurationWithSync in a spCellConfig of a master cell group (MCG) is transferred from a first base station to the terminal, and
wherein in case that the RRC reconfiguration message is associated with the MCG and includes the dedicated SIB1-Delivery and the
reconfigurationWithSync, the dedicated SIB request message is received after the random access procedure to the second base station is completed.
8. The method of claim 7 ,
wherein the reconfigurationWithSync includes information on a timer for a corresponding SpCell, and wherein the SIB comprises at least one of SIB 12 or SIB 14.
9. The method of claim 7 ,
wherein the dedicated SIB1-Delivery includes scheduling information associated with system information (SI), and wherein the SIB is required by the terminal in an RRC connected state.
10. The method of claim 9 ,
wherein an active bandwidth part (BWP) is not configured with a common search space, and
wherein the dedicated SIB request message is received based on the scheduling information.
11. The method of claim 9 ,
wherein a system information broadcast status is set to not broadcasting based on the scheduling information, and wherein the dedicated SIB request message is received, based on an active bandwidth part (BWP) being configured with a common search space and the system information broadcast status being set to not broadcasting.
12. A terminal in a wireless communication system, the terminal comprising:
a transceiver; and
a controller configured to:
receive, from a first base station, a radio resource control (RRC) reconfiguration message including a dedicated system information block (SIB) 1-Delivery and a reconfigurationWithSync in a spCellConfig of a master cell group (MCG),
identify whether the RRC reconfiguration message is associated with the MCG and includes the dedicated SIB1-Delivery and the reconfigurationWithSync, and
in case that the RRC reconfiguration message is associated with the MCG and includes the dedicated SIB1-Delivery and the reconfigurationWithSync, transmit, to a second base station, a dedicated SIB request message for an SIB after a random access procedure to the second base station is completed.
13. The terminal of claim 12 ,
wherein the SIB comprises at least one of SIB 12 or SIB 14.
14. The terminal of claim 12 ,
wherein the dedicated SIB1-Delivery includes scheduling information associated with system information (SI), and
wherein the SIB is required by the terminal in an RRC connected state.
15. The terminal of claim 14 , wherein the controller is further configured to:
identify that an active bandwidth part (BWP) is not configured with a common search space,
wherein the dedicated SIB request message is transmitted based on the scheduling information.
16. The terminal of claim 14 , wherein the controller is further configured to:
identify that an active bandwidth part (BWP) is configured with a common search space, and
identify that a system information broadcast status is set to not broadcasting based on the scheduling information,
wherein the dedicated SIB request message is transmitted, based on the active BWP being configured with the common search space and the system information broadcast status being set to not broadcasting.
17. A second base station associated with a target special cell (SpCell) in a wireless communication system, the base station comprising:
a transceiver; and
a controller configured to:
perform a random access procedure with a terminal, and
receive, from the terminal, a dedicated system information block (SIB) request message for an SIB,
wherein a radio resource control (RRC) reconfiguration message including a dedicated SIB1-Delivery and a reconfigurationWithSync in a spCellConfig of a master cell group (MCG) is transferred from a first base station to the terminal, and
wherein in case that the RRC reconfiguration message is associated with the MCG and includes the dedicated SIB1-Delivery and the
reconfigurationWithSync, the dedicated SIB request message is received after the random access procedure to the second base station is completed.
18. The base station of claim 17 ,
wherein the reconfigurationWithSync includes information on a timer for a corresponding special cell (SpCell), and
wherein the SIB comprises at least one of SIB 12 or SIB 14.
19. The base station of claim 17 ,
wherein the dedicated SIB1-Delivery includes scheduling information associated with system information (SI), and
wherein the SIB is required by the terminal in an RRC connected state.
20. The base station of claim 19 ,
wherein an active bandwidth part (BWP) is not configured with a common search space, and
wherein the dedicated SI request message is received based on the scheduling information.