A method performed by a User Equipment, UE, for power saving operations, the method comprising: receiving a first Radio Resource Control, RRC, configuration indicating a set of one or more dormancy cell groups (810, 812), wherein a group of serving cells (802, 804, 806, 808) belongs to a specific dormancy cell group (810, 812) in the set of one or more dormancy cell groups (810, 812); receiving a second RRC configuration indicating a first Bandwidth Part, BWP, on which the UE is configured with a dormant operation, for a serving cell (802, 804, 806, 808), the dormant operation including performing a Channel State Information, CSI, measurement and stopping monitoring a Physical Downlink Control Channel, PDCCH, the serving cell 802, 804, 806, 808) belonging to the group of serving cells (802, 804, 806, 808); receiving a third RRC configuration indicating a second BWP, on which the UE is not configured with the dormant operation, for the serving cell; receiving a Power Saving Signal, PSS, on a Primary Cell, PCell, or a Special Cell, SpCell, when the UE is not in a Discontinuous Reception, DRX, active time, wherein the PSS includes a bitmap, and each bit (B1, B2) in the bitmap is associated with one dormancy cell group (810, 812) in the set of one or more dormancy cell groups (810, 812); determining an active BWP of the serving cell (802, 804, 806, 808) included in the group of serving cells (802, 804, 806, 808) as the first BWP (1A, 1B, 1C) after determining that a bit (B1, B2) associated with the specific dormancy cell group (810, 812) in the bitmap is set to a first value; and determining the active BWP of the serving cell (802, 804, 806, 808) as the second BWP (2A, 2B, 2C) after determining that the bit (B1, B2) is set to a second value. receiving a first Radio Resource Control, RRC, configuration indicating a set of one or more dormancy cell groups (810, 812), wherein a group of serving cells (802, 804, 806, 808) belongs to a specific dormancy cell group (810, 812) in the set of one or more dormancy cell groups (810, 812); receiving a second RRC configuration indicating a first Bandwidth Part, BWP, on which the UE is configured with a dormant operation, for a serving cell (802, 804, 806, 808), the dormant operation including performing a Channel State Information, CSI, measurement and stopping monitoring a Physical Downlink Control Channel, PDCCH, the serving cell 802, 804, 806, 808) belonging to the group of serving cells (802, 804, 806, 808); receiving a third RRC configuration indicating a second BWP, on which the UE is not configured with the dormant operation, for the serving cell; receiving a Power Saving Signal, PSS, on a Primary Cell, PCell, or a Special Cell, SpCell, when the UE is not in a Discontinuous Reception, DRX, active time, wherein the PSS includes a bitmap, and each bit (B1, B2) in the bitmap is associated with one dormancy cell group (810, 812) in the set of one or more dormancy cell groups (810, 812); determining an active BWP of the serving cell (802, 804, 806, 808) included in the group of serving cells (802, 804, 806, 808) as the first BWP (1A, 1B, 1C) after determining that a bit (B1, B2) associated with the specific dormancy cell group (810, 812) in the bitmap is set to a first value; and determining the active BWP of the serving cell (802, 804, 806, 808) as the second BWP (2A, 2B, 2C) after determining that the bit (B1, B2) is set to a second value.