Method of performing a power saving operation and related device
A method of performing a power saving operation for a user equipment (UE) is provided. The method includes receiving, from a base station (BS), a plurality of power saving configurations, while the UE is in a radio resource control (RRC) idle state or an RRC inactive state, selecting one of the plurality of power saving configurations according to a rule predefined in the UE or a first indication received from the BS, and applying the selected one of the plurality of power saving configurations for the power saving operation.
1 . A method of performing a power saving operation by a user equipment (UE), the method comprising:
receiving, from a base station (BS), a first power saving configuration and a second power saving configuration, while the UE is in a radio resource control (RRC) idle state or an RRC inactive state;
selecting one of the first power saving configuration or the second power saving configuration based on a rule that is predefined in the UE;
switching from a normal power mode to a power saving mode in response to determining that a measured signal strength is lower than a threshold; and
applying the selected one of the first power saving configuration or the second power saving configuration for the power saving operation in response to switching from the normal power mode to the power saving mode, wherein:
the first power saving configuration includes a Discontinuous Reception (DRX) configuration including at least one DRX related parameter, and
the second power saving configuration includes a non-DRX configuration including at least one of a paging related parameter or a physical downlink control channel (PDCCH) monitoring related parameter.
2 . The method of claim 1 , wherein the selected one of the first power saving configuration or the second power saving configuration includes a first parameter for configuring the UE to operate in the power saving mode.
3 . The method of claim 2 , further comprising:
receiving, from the BS, a third power saving configuration, while the UE is in an RRC connected state, wherein
the third power saving configuration includes a second parameter that is different from the first parameter.
4 . The method of claim 1 , wherein selecting the one of the first power saving configuration or the second power saving configuration is further based on at least one of a preference of the UE, an RRC state of the UE, or a resource configuration stored in the UE or applied to the UE.
5 . The method of claim 1 , wherein selecting the one of the first power saving configuration or the second power saving configuration is further based on a first indication received from the BS.
6 . The method of claim 1 , further comprising:
receiving, from the BS, a value of a timer associated with the first power saving configuration and the second power saving configuration; and
starting the timer based on the value, wherein applying the selected one of the first power saving configuration or the second power saving configuration for the power saving operation comprises applying the selected one of the first power saving configuration or the second power saving configuration until the timer expires.
7 . The method of claim 1 , wherein:
switching from the normal power mode to the power saving mode comprises switching from the normal power mode to the power saving mode based on a first indication received from the BS, and
the first indication is associated with a value of a timer associated with a condition for switching from the normal power mode to the power saving mode.
8 . The method of claim 7 , further comprising:
starting the timer based on the value, wherein:
switching from the normal power mode to the power saving mode comprises switching from the normal power mode to the power saving mode when the timer expires, and
the threshold comprises at least one of a Reference Signal Received Power (RSRP) threshold, a Reference Signal Received Quality (RSRQ) threshold, a Signal to Interference plus Noise Ratio (SINR) threshold, or a Received Signal Strength Indicator (RSSI) threshold.
9 . The method of claim 1 , further comprising:
transmitting, to the BS, a signal that indicates that the UE has switched from the normal power mode to the power saving mode.
10 . The method of claim 9 , wherein the signal comprises at least one of an RRC message, a Medium Access Control (MAC) control element (CE), or uplink control information (UCI).
11 . A user equipment (UE) for performing a power saving operation, the UE comprising:
at least one processor; and
at least one non-transitory machine-readable medium coupled to the at least one processor and storing one or more computer-executable instructions that, when executed by the at least one processor, cause the UE to:
receive, from a base station (BS), a first power saving configuration and a second power saving configuration, while the UE is in a radio resource control (RRC) idle state or an RRC inactive state;
select one of the first power saving configuration or the second power saving configuration based on a rule that is predefined in the UE;
switch from a normal power mode to a power saving mode in response to determining that a measured signal strength is lower than a threshold; and
apply the selected one of the first power saving configuration or the second power saving configuration for the power saving operation in response to switching from the normal power mode to the power saving mode, wherein:
the first power saving configuration includes a Discontinuous Reception (DRX) configuration including at least one DRX related parameter, and
the second power saving configuration includes a non-DRX configuration including at least one of a paging related parameter or a physical downlink control channel (PDCCH) monitoring related parameter.
12 . The UE of claim 11 , wherein the selected one of the first power saving configuration or the second power saving configuration includes a first parameter for configuring the UE to operate in the power saving mode.
13 . The UE of claim 12 , wherein the one or more computer-executable instructions, when executed by the at least one processor, further cause the UE to:
receive, from the BS, a third power saving configuration, while the UE is in an RRC connected state, wherein
the third power saving configuration includes a second parameter that is different from the first parameter.
14 . The UE of claim 11 , wherein selecting the one of the first power saving configuration or the second power saving configuration is further based on at least one of a preference of the UE, an RRC state of the UE, or a resource configuration stored in the UE or applied to the UE.
15 . The UE of claim 11 , wherein selecting the one of the first power saving configuration or the second power saving configuration is further based on a first indication received from the BS.
16 . The UE of claim 11 , wherein the one or more computer-executable instructions, when executed by the at least one processor, further cause the UE to:
receive, from the BS, a value of a timer associated with the first power saving configuration and the second power saving configuration; and
start the timer based on the value, wherein applying the selected one of the first power saving configuration or the second power saving configuration comprises applying the selected one of the first power saving configuration or the second power saving configuration until the timer expires.
17 . The UE of claim 11 , wherein:
switching from the normal power mode to the power saving mode comprises switching from the normal power mode to the power saving mode based on a first indication received from the BS, and
the first indication is associated with a value of a timer associated with a condition for switching from the normal power mode to the power saving mode.
18 . The UE of claim 17 , wherein the one or more computer-executable instructions, when executed by the at least one processor, further cause the UE to:
start the timer based on the value, wherein:
switching from the normal power mode to the power saving mode comprises switching from the normal power mode to the power saving mode when the timer expires, and
the threshold comprises at least one of a Reference Signal Received Power (RSRP) threshold, a Reference Signal Received Quality (RSRQ) threshold, a Signal to Interference plus Noise Ratio (SINR) threshold, or a Received Signal Strength Indicator (RSSI) threshold.
19 . The UE of claim 11 , wherein the one or more computer-executable instructions, when executed by the at least one processor, further cause the UE to:
transmit, to the BS, a signal that indicates that the UE has switched from the normal power mode to the power saving mode.
20 . The UE of claim 19 , wherein the signal comprises at least one of an RRC message, a Medium Access Control (MAC) control element (CE), or uplink control information (UCI).