Method and apparatus for controlling dormant state of secondary cell in next-generation mobile 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. Provided are a method and an apparatus for allocating V2X resources of an SN to a UE in a dual connectivity supporting network and also a method and an apparatus for controlling a dormant state of an SCell.
1. A method performed by a terminal in a wireless communication system, the method comprising:
receiving, from a base station, configuration information for a secondary cell (SCell), wherein, in case that the terminal supports a dormant state, the configuration information includes information on a hibernation timer and information on a periodicity of a channel state information (CSI) reporting, wherein the periodicity associated with an activated state for the SCell includes a first periodicity and a second periodicity;
identifying whether the SCell is in the activated state;
in case that the SCell is in the activated state, starting the hibernation timer, wherein the CSI reporting is performed based on the first periodicity or the second periodicity;
entering the dormant state based on an expiration of the hibernation timer;
receiving, from the base station, an activation command for the SCell;
entering the activated state from the dormant state based on the activation command; and
performing the CSI reporting based on the second periodicity,
wherein the second periodicity is longer than the first periodicity, and
wherein, in case that the terminal does not support the dormant state, the configuration information includes information on a SCell deactivation timer.
2. The method of claim 1 , further comprising performing the CSI reporting on the SCell, during the dormant state.
3. The method of claim 1 , further comprising:
deactivating the SCell based on an expiration of a dormant SCell deactivation timer; and
stopping the dormant SCell deactivation timer based on the expiration of the dormant SCell deactivation timer,
wherein the configuration information includes information on the dormant SCell deactivation timer.
4. The method of claim 1 ,
wherein, while the SCell is in the activated state, the hibernation timer is restarted, in case that an uplink grant or a downlink assignment is received on the SCell.
5. The method of claim 1 , wherein the configuration information is received through a radio resource control (RRC) message or a medium access control control element (MAC CE).
6. A method performed by a base station in a wireless communication system, the method comprising:
transmitting, to a terminal, configuration information for a secondary cell (SCell), wherein, in case that the terminal supports a dormant state, the configuration information includes information on a hibernation timer and information on a periodicity of a channel state information (CSI) reporting, wherein the periodicity associated with an activated state for the SCell includes a first periodicity and a second periodicity; and
transmitting, to the terminal, an activation command for the SCell while the terminal is in the dormant state for the SCell,
wherein, in case that the SCell is in the activated state, the CSI reporting is performed based on the first periodicity or the second periodicity,
wherein, in case that the hibernation timer is expired, the terminal enters the dormant state for the SCell,
wherein, in case that the SCell is in the activated state based on the activation command, the CSI reporting is performed based on the second periodicity,
wherein the second periodicity is longer than the first periodicity, and
wherein, in case that the terminal does not support the dormant state, the configuration information includes information on a SCell deactivation timer.
7. The method of claim 6 ,
wherein the CSI reporting is performed on the SCell, during the dormant state.
8. The method of claim 6 ,
wherein the SCell is deactivated based on an expiration of a dormant SCell deactivation timer,
wherein the dormant SCell deactivation timer is stopped based on the expiration of the dormant SCell deactivation timer, and
wherein the configuration information includes information on the dormant SCell deactivation timer.
9. The method of claim 6 ,
wherein, while the SCell is in the activated state, the hibernation timer is restarted, in case that an uplink grant or a downlink assignment is received on the SCell.
10. The method of claim 6 , wherein the configuration information is transmitted through a radio resource control (RRC) message or a medium access control control element (MAC CE).
11. A terminal in a wireless communication system, the terminal comprising:
a transceiver configured to transmit and receive a signal; and
a processor configured to:
receive from a base station, configuration information for a secondary cell (SCell), wherein, in case that the terminal supports a dormant state, the configuration information includes information on a hibernation timer and information on a periodicity of a channel state information (CSI) reporting, wherein the periodicity associated with an activated state for the SCell includes a first periodicity and a second periodicity;
identify whether the SCell is in the activated state;
in case that the SCell is in the activated state, start the hibernation timer, wherein the CSI reporting is performed based on the first periodicity or the second periodicity;
enter the dormant state based on an expiration of the hibernation timer;
receive, from the base station, an activation command for the SCell;
enter the activated state from the dormant state based on the activation command; and
perform the CSI reporting based on the second periodicity,
wherein the second periodicity is longer than the first periodicity, and
wherein, in case that the terminal does not support the dormant state, the configuration information includes information on a SCell deactivation timer.
12. The terminal of claim 11 , wherein the processor is further configured to perform the CSI reporting on the SCell during the dormant state.
13. The terminal of claim 11 , wherein the processor is further configured to:
deactivate the SCell based on an expiration of a dormant SCell deactivation timer; and
stop the dormant SCell deactivation timer based on the expiration of the dormant SCell deactivation timer,
wherein the configuration information includes information on the dormant SCell deactivation timer.
14. The terminal of claim 11 ,
wherein, while the SCell is in the activated state, the hibernation timer is restarted, in case that an uplink grant or a downlink assignment is received on the SCell.
15. The terminal of claim 11 , wherein the configuration information is received through a radio resource control (RRC) message or a medium access control control element (MAC CE).
16. A base station in a wireless communication system, the base station comprising:
a transceiver configured to transmit and receive a signal; and
a processor configured to:
transmit, to a terminal, configuration information for a secondary cell (SCell), wherein, in case that the terminal supports a dormant state, the configuration information includes information on a hibernation timer and information on a periodicity of a channel state information (CSI) reporting, wherein the periodicity associated with an activated state for the SCell includes a first periodicity and a second periodicity; and
transmit, to the terminal, an activation command for the SCell while the terminal is in the dormant state for the SCell,
wherein, in case that the SCell is in the activated state, the CSI reporting is performed based on the first periodicity or the second periodicity,
wherein, in case that the hibernation timer is expired, the terminal enters the dormant state for the SCell,
wherein, in case that the SCell is in the activated state based on the activation command, the CSI reporting is performed based on the second periodicity,
wherein the second periodicity is longer than the first periodicity, and
wherein, in case that the terminal does not support the dormant state, the configuration information includes information on a SCell deactivation timer.
17. The base station of claim 16 , wherein the CSI reporting is performed on the SCell, during the dormant state.
18. The base station of claim 16 ,
wherein the SCell is deactivated based on an expiration of a dormant SCell deactivation timer,
wherein the dormant SCell deactivation timer is stopped based on the expiration of the dormant SCell deactivation timer, and
wherein the configuration information includes information on the dormant SCell deactivation timer.
19. The base station of claim 16 ,
wherein, while the SCell is in the activated state, the hibernation timer is restarted, in case that an uplink grant or a downlink assignment is received on the SCell.
20. The base station of claim 16 , wherein the configuration information is transmitted through a radio resource control (RRC) message or a medium access control control element (MAC CE).