Method and apparatus for network energy saving in wireless networks

1 . A method performed by a user equipment (UE) for network energy saving (NES), the method comprising:

receiving, from a base station (BS), a channel state information (CSI) report configuration comprising a plurality of sub-configurations associated with a triggering state, each sub-configuration in the plurality of sub-configurations indicating a list of channel state information (CSI)-reference signal (RS) identifiers (IDs), first information for a spatial domain adaptation, and second information for a power domain adaptation;

receiving a plurality of CSI-RSs based on the list of CSI-RS IDs, the first information, and the second information indicated by each sub-configuration in a subset of the plurality of sub-configurations;

generating a CSI report by measuring the plurality of CSI-RSs; and

transmitting, to the BS, the CSI report,

wherein the triggering state is associated with aperiodic CSI reporting or semi-persistent CSI reporting.

2 . The method of claim 1 , wherein the CSI report comprises at least one of a channel quality indicator (CQI), a precoding matrix indicator (PMI), a CSI-RS resource indicator (CRI), a synchronization signal/physical broadcast channel block resource indicator (SSBRI), a layer indicator (LI), a rank indicator (RI), and a layer 1 (L1)-reference signal received power (RSRP).

3 . The method of claim 1 , wherein, in a case that the triggering state is associated with the aperiodic CSI reporting, the subset of the plurality of sub-configurations is activated by a medium access control (MAC) control element (CE) received from the BS, and indicated by downlink control information (DCI) received from the BS.

4 . The method of claim 1 , wherein, in a case that the triggering state is associated with the semi-persistent CSI reporting, the subset of the plurality of sub-configurations is activated by a medium access control (MAC) control element (CE) received from the BS.

5 . The method of claim 1 , wherein the first information in each sub-configuration in the subset of the plurality of sub-configurations comprises an antenna port configuration associated with a corresponding list of CSI-RS IDs in the sub-configuration.

6 . The method of claim 1 , wherein the second information in each sub-configuration in the subset of the plurality of sub-configurations comprises a power offset value associated with a corresponding list of CSI-RS IDs in the sub-configuration.

7 . A user equipment (UE) for network energy saving, the UE comprising:

at least one processor; and

at least one non-transitory computer-readable medium coupled to 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 channel state information (CSI) report configuration comprising a plurality of sub-configurations associated with a triggering state, each sub-configuration in the plurality of sub-configurations indicating a list of channel state information (CSI)-reference signal (RS) identifiers (IDs), first information for a spatial domain adaptation, and second information for a power domain adaptation;

receive a plurality of CSI-RSs based on the list of CSI-RS IDs, the first information, and the second information indicated by each sub-configuration in a subset of the plurality of sub-configurations;

generate a CSI report by measuring the plurality of CSI-RSs; and

transmit, to the BS, the CSI report,

wherein the triggering state is associated with aperiodic CSI reporting or semi-persistent CSI reporting.

8 . The UE of claim 7 , wherein the CSI report comprises at least one of a channel quality indicator (CQI), a precoding matrix indicator (PMI), a CSI-RS resource indicator (CRI), a synchronization signal/physical broadcast channel block resource indicator (SSBRI), a layer indicator (LI), a rank indicator (RI), and a layer 1 (L1)-reference signal received power (RSRP).

9 . The UE of claim 7 , wherein, in a case that the triggering state is associated with the aperiodic CSI reporting, the subset of the plurality of sub-configurations is activated by a medium access control (MAC) control element (CE) received from the BS, and indicated by downlink control information (DCI) received from the BS.

10 . The UE of claim 7 , wherein, in a case that the triggering state is associated with the semi-persistent CSI reporting, the subset of the plurality of sub-configurations is activated by a medium access control (MAC) control element (CE) received from the BS.

11 . The UE of claim 7 , wherein the first information in each sub-configuration in the subset of the plurality of sub-configurations comprises an antenna port configuration associated with a corresponding list of CSI-RS IDs in the sub-configuration.

12 . The UE of claim 7 , wherein the second information in each sub-configuration in the subset of the plurality of sub-configurations comprises a power offset value associated with a corresponding list of CSI-RS IDs in the sub-configuration.

13 . A base station (BS) for network energy saving, the BS comprising:

at least one processor; and

at least one non-transitory computer-readable medium coupled to at least one processor and storing one or more computer-executable instructions that, when executed by the at least one processor, cause the BS to:

transmit, to a user equipment (UE), a channel state information (CSI) report configuration comprising a plurality of sub-configurations associated with a triggering state, each sub-configuration in the plurality of sub-configurations indicating a list of channel state information (CSI)-reference signal (RS) identifiers (IDs), first information for a spatial domain adaptation, and second information for a power domain adaptation;

transmit a plurality of CSI-RSs based on the list of CSI-RS IDs, the first information, and the second information indicated by each sub-configuration in a subset of the plurality of sub-configurations; and

receive, from the UE, a CSI report, wherein:

the CSI report is generated by measuring the plurality of CSI-RSs, and

the triggering state is associated with aperiodic CSI reporting or semi-persistent CSI reporting.

14 . The BS of claim 13 , wherein the CSI report comprises at least one of a channel quality indicator (CQI), a precoding matrix indicator (PMI), a CSI-RS resource indicator (CRI), a synchronization signal/physical broadcast channel block resource indicator (SSBRI), a layer indicator (LI), a rank indicator (RI), and a layer 1 (L1)-reference signal received power (RSRP).

15 . The BS of claim 13 , wherein, in a case that the triggering state is associated with the aperiodic CSI reporting, the subset of the plurality of sub-configurations is activated by a medium access control (MAC) control element (CE) transmitted to the UE, and indicated by downlink control information (DCI) transmitted to the UE.

16 . The BS of claim 13 , wherein, in a case that the triggering state is associated with the semi-persistent CSI reporting, the subset of the plurality of sub-configurations is activated by a medium access control (MAC) control element (CE) transmitted to the UE.

17 . The BS of claim 13 , wherein the first information in each sub-configuration in the subset of the plurality of sub-configurations comprises an antenna port configuration associated with a corresponding list of CSI-RS IDs in the sub-configuration.

18 . The BS of claim 13 , wherein the second information in each sub-configuration in the subset of the plurality of sub-configurations comprises a power offset value associated with a corresponding list of CSI-RS IDs in the sub-configuration.