Method, user equipment, processing device and storage medium for receiving downlink signal, and method and base station for transmitting downlink signal

1 . A method of performed by a user equipment (UE), the method comprising:

monitoring a system information block 1 (SIB1) of a first cell on the first cell with a first periodicity;

receiving a configuration related to a network energy saving (NES) mode for the first cell, wherein the configuration related to the NES mode for the first cell includes information regarding a time period for the NES mode and cell information regarding a second cell; and

monitoring the S1B1 of the first cell on the second cell within a first time period, based on the first cell being in the NES mode.

2 . The method of claim 1 , further comprising:

monitoring a synchronization signal block (SSB) of the first cell on the first cell, based on the first cell not being in the NES mode; and

monitoring the SSB of the first cell on the second cell within the first time period, based on the first cell being in the NES mode.

3 . The method of claim 1 , comprising:

detecting a group-common downlink control information (DCI) format for the first cell to transition to the NES mode.

4 . The method of claim 3 , wherein the information regarding the time period for the NES mode includes configurations for a plurality of time periods, and

wherein the group-common DCI format includes information regarding the first time period among the plurality of time periods.

5 . The method of claim 3 , further comprising: transmitting an acknowledgment (ACK) or a negative ACK (NACK) for transitioning to the NES mode based on the group-common DCI format.

6 . The method of claim 1 , comprising:

based on the first cell being in the NES mode:

monitoring a physical downlink control channel (PDCCH) for the S1B1 of the first cell on the first cell;

transmitting an S1B1 request on a random access channel (RACH) resource related to a first PDCCH that schedules the SIB1 of the first cell, based on detection of the first PDCCH; and

receiving a physical downlink shared channel (PDSCH) carrying the SIB1 on the first cell, based on the transmission of the SIB1 request.

7 . A user equipment (UE) comprising:

at least one transceiver;

at least one processor; and

at least one computer memory operably connected to the at least one processor and configured to store instructions that, when executed, cause the at least one processor to perform operations comprising:

monitoring a system information block 1 (SIB1) of a first cell on the first cell with a first periodicity;

receiving a configuration related to a network energy saving (NES) mode for the first cell, wherein the configuration related to the NES mode includes information regarding a time period for the NES mode and cell information regarding a second cell; and

monitoring the S1B1 of the first cell on the second cell within a first time period, based on the first cell being in the NES mode.

8 . A base station (BS) comprising:

at least one transceiver;

at least one processor; and

at least one computer memory operably connected to the at least one processor and configured to store instructions that, when executed, cause the at least one processor to perform operations comprising:

transmitting a system information block 1 (SIB1) of a first cell on the first cell with a first periodicity;

transmitting a configuration related to a network energy saving (NES) mode for the first cell, wherein the configuration related to the NES mode for the first cell includes information regarding a time period for the NES mode and cell information regarding a second cell; and

transmitting the S1B1 of the first cell on the second cell within a first time period, based on the first cell being in the NES mode.

9 . The BS of claim 8 , wherein the operations further comprise:

transmitting a synchronization signal block (SSB) of the first cell on the first cell, based on the first cell not being in the NES mode; and

transmitting the SSB of the first cell on the second cell within the first time period, based on the first cell being in the NES mode.

10 . The BS of claim 8 , wherein the operations comprise transmitting a group-common downlink control information (DCI) format for the first cell to transition to the NES mode.

11 . The BS of claim 10 , wherein the information regarding the time period for the NES mode includes configurations for a plurality of time periods, and

wherein the group-common DCI format includes information regarding the first time period among the plurality of time periods.

12 . The BS of claim 10 , wherein the operations further comprise receiving an acknowledgment (ACK) or a negative ACK (NACK) for transitioning to the NES mode in response to the transmission of the group-common DCI format.

13 . The BS of claim 8 , wherein the operations comprise: based on the first cell being in the NES mode:

transmitting a first physical downlink control channel (PDCCH) that schedules the SIB1 of the first cell on the first cell; and

transmitting a physical downlink shared channel (PDSCH) carrying the SIB1, based on reception of an S1B1 request on a random access channel (RACH) resource related to the first PDCCH.

14 . The method of claim 1 , wherein the SIB1 of the first cell is present on the first cell with a second periodicity longer than the first periodicity based on the first cell being in the NES mode.

15 . The method of claim 1 , wherein the SIB1 of the first cell is absent on the first cell in the first time period based on the first cell being in the NES mode.

16 . The method of claim 2 , wherein the SSB of the first cell is absent on the first cell in the first time period based on the first cell being in the NES mode.

17 . The BS of claim 8 , wherein the SIB1 of the first cell is transmitted on the first cell with a second periodicity longer than the first periodicity based on the first cell being in the NES mode.

18 . The BS of claim 8 , wherein the SIB1 of the first cell is absent on the first cell in the first time period based on the first cell being in the NES mode.

19 . The BS of claim 9 , wherein the SSB of the first cell is absent on the first cell in the first time period based on the first cell being in the NES mode.