Method and apparatus for performing fast cell activation in wireless communication system
The disclosure relates to a 5G or 6G communication system for supporting a higher data transmission rate. The disclosure provides a method and apparatus for quickly performing cell activation in a wireless communication system. The method of UE comprises receiving, from a base station, first channel measurement configuration information and second channel measurement configuration information that include channel measurement signal information; receiving, from the base station, MAC CE for a cell activation or a cell deactivation; identifying, based on the MAC CE, at least one cell in which the cell activation is indicated for the terminal; determining, based on the first channel measurement configuration information and the second channel measurement configuration information, channel measurement configuration information for the at least one cell in which the cell activation is indicated; and performing the cell activation based on the second channel measurement configuration information and the MAC CE.
1 . A method performed by a terminal in a wireless communication system, the method comprising:
receiving, from a base station, a media access control (MAC) control element (CE) for activating a secondary cell (SCell); and
in case that the SCell is deactivated before receiving the MAC CE, activating the SCell based on the MAC CE,
wherein the MAC CE includes:
at least one C i field, wherein each C i field indicates an activation or a deactivation of an SCell with index i, and
at least one reference signal (RS) related octet respectively corresponding to at least one SCell indicated by the at least one C i field to be activated, wherein, in case that an RS related octet is set to a non-zero value, the RS related octet indicates information associated with an RS for an SCell indicated by a C i field to be activated, and wherein, in case that the RS related octet is set to zero, the RS related octet indicates that no RS is used for the SCell indicated by the C i field to be activated.
2 . The method of claim 1 , wherein the at least one RS related octet is included in the MAC CE in ascending order based on index information for SCells indicated by C i fields to be activated.
3 . The method of claim 1 , wherein each C i field is set to 1 to indicate that the SCell with index i is to be activated and that an RS related octet is included for the SCell with index i.
4 . The method of claim 1 , wherein each C i field is set to 0 to indicate that the SCell with index i is to be deactivated and that no RS related octet is included for the SCell with index i.
5 . The method of claim 1 , wherein the information associated with the RS includes resource information for the RS and quasi co-location (QCL) information for the RS.
6 . A method performed by a base station in a wireless communication system, the method comprising:
transmitting, to a terminal, a media access control (MAC) control element (CE) for activating a secondary cell (SCell); and
in case that the SCell is deactivated before transmitting the MAC CE, performing at least one operation for the SCell activated based on the MAC CE,
wherein the MAC CE includes:
at least one C i field, wherein each C i field indicates an activation or a deactivation of an SCell with index i, and
at least one reference signal (RS) related octet respectively corresponding to at least one SCell indicated by the at least one C i field to be activated, wherein, in case that an RS related octet is set to a non-zero value, the RS related octet indicates information associated with an RS for an SCell indicated by a C i field to be activated, and wherein, in case that the RS related octet is set to zero, the RS related octet indicates that no RS is used for the SCell indicated by the C i field to be activated.
7 . The method of claim 6 , wherein the at least one RS related octet is included in the MAC CE in ascending order based on index information for SCells indicated by C i fields to be activated.
8 . The method of claim 6 , wherein each C i field is set to 1 to indicate that the SCell with index i is to be activated and that an RS related octet is included for the SCell with index i.
9 . The method of claim 6 , wherein each C i field is set to 0 to indicate that the SCell with index i is to be deactivated and that no RS related octet is included for the SCell with index i.
10 . The method of claim 6 , wherein the information associated with the RS includes resource information for the RS and quasi co-location (QCL) information for the RS.
11 . A terminal in a wireless communication system, the terminal comprising:
a transceiver; and
a controller configured to:
receive, from a base station via the transceiver, a media access control (MAC) control element (CE) for activating a secondary cell (SCell), and
in case that the SCell is deactivated before receiving the MAC CE, activate the SCell based on the MAC CE,
wherein the MAC CE includes:
at least one C i field, wherein each C i field indicates an activation or a deactivation of an SCell with index i, and
at least one reference signal (RS) related octet respectively corresponding to at least one SCell indicated by the at least one C i field to be activated, wherein, in case that an RS related octet is set to a non-zero value, the RS related octet indicates information associated with an RS for an SCell indicated by a C i field to be activated, and wherein, in case that the RS related octet is set to zero, the RS related octet indicates that no RS is used for the SCell indicated by the C i field to be activated.
12 . The terminal of claim 11 , wherein the at least one RS related octet is included in the MAC CE in ascending order based on index information for SCells indicated by C i fields to be activated.
13 . The terminal of claim 11 , wherein each C i field is set to 1 to indicate that the SCell with index i is to be activated and that an RS related octet is included for the SCell with index i.
14 . The terminal of claim 11 , wherein each C i field is set to 0 to indicate that the SCell with index i is to be deactivated and that no RS related octet is included for the SCell with index i.
15 . The terminal of claim 11 , wherein the information associated with the RS includes resource information for the RS and quasi co-location (QCL) information for the RS.
16 . A base station in a wireless communication system, the base station comprising:
a transceiver; and
a controller configured to:
transmit, to a terminal via the transceiver, a media access control (MAC) control element (CE) for activating a secondary cell (SCell), and
in case that the SCell is deactivated before transmitting the MAC CE, perform at least one operation for the SCell activated based on the MAC CE,
wherein the MAC CE includes:
at least one C i field, wherein each C i field indicates an activation or a deactivation of an SCell with index i, and
at least one reference signal (RS) related octet respectively corresponding to at least one SCell indicated by the at least one C i field to be activated, wherein, in case that an RS related octet is set to a non-zero value, the RS related octet indicates information associated with an RS for an SCell indicated by a C i field to be activated, and wherein, in case that the RS related octet is set to zero, the RS related octet indicates that no RS is used for the SCell indicated by the C i field to be activated.
17 . The base station of claim 16 , wherein the at least one RS related octet is included in the MAC CE in ascending order based on index information for SCells indicated by C i fields to be activated.
18 . The base station of claim 16 , wherein each C i field is set to 1 to indicate that the SCell with index i is to be activated and that an RS related octet is included for the SCell with index i.
19 . The base station of claim 16 , wherein each C i field is set to 0 to indicate that the SCell with index i is to be deactivated and that no RS related octet is included for the SCell with index i.
20 . The base station of claim 16 , wherein the information associated with the RS includes resource information for the RS and quasi co-location (QCL) information for the RS.