Method for transmitting and receiving SIB1 in wireless communication system, and device therefor

1 . A method of receiving, by a reduced capability (RedCap) user equipment (UE), a system information block 1 (SIB1) in a wireless communication system, the method comprising:

receiving a master information block (MIB) from a base station (BS) through a physical broadcast channel (PBCH);

receiving downlink control information (DCI) from the BS based on the MIB; and

receiving the SIB1 including cell barring information from the BS based on the DCI,

wherein the cell barring information represents whether to bar a cell based on a receive (Rx) branch of the RedCap UE,

wherein based on the RedCap UE being a UE equipped with one Rx branch, the cell is barred for the RedCap UE,

wherein based on the RedCap UE being a UE equipped with two Rx branches, the cell is not barred for the RedCap UE,

wherein the cell barring information is configured to take one of two values indicating a barred state and a not barred state for the RedCap UE equipped with the one Rx branch,

wherein, based on the cell barring information indicating the barred state, the cell is identified by the RedCap UE equipped with the one Rx branch as barred when the cell is included in a four receive branch band, and the cell is identified by the RedCap UE equipped with the one Rx branch as not barred when the cell is included in a two receive branch band, and

wherein the four receive branch band requires a non-reduced capability UE to be equipped with at least four receive antenna ports, and the two receive branch band requires a non-reduced capability UE to be equipped with at least two receive antenna ports.

2 . The method of claim 1 , wherein the cell barring information is 1-bit information.

3 . The method of claim 1 , wherein based on the cell being barred, a cell search is performed by changing a frequency.

4 . The method of claim 1 , wherein the MIB includes information related to a control resource set (CORESET) #0.

5 . The method of claim 4 , wherein the DCI is received on the CORESET #0.

6 . The method of claim 5 , wherein the DCI is related to DCI format 1 0 with cyclic redundancy check (CRC) scrambled by system information (SI)-radio network temporary identifier (RNTI).

7 . The method of claim 6 , wherein the SIB1 is received through a physical downlink shared channel (PDSCH).

8 . A reduced capability (RedCap) user equipment (UE) configured to receive a system information block 1 (SIB1) in a wireless communication system, the RedCap UE comprising:

at least one transceiver;

at least one processor; and

at least one memory operably connected to the at least one processor,

wherein the at least one memory is configured to store instructions performing operations based on being executed by the at least one processor,

wherein the operations comprise:

receiving a master information block (MIB) from a base station (BS) through a physical broadcast channel (PBCH);

receiving downlink control information (DCI) from the BS based on the MIB; and

receiving the SIB1 including cell barring information from the BS based on the DCI,

wherein the cell barring information represents whether to bar a cell based on a receive (Rx) branch of the RedCap UE,

wherein based on the RedCap UE being a UE equipped with one Rx branch, the cell is barred for the RedCap UE,

wherein based on the RedCap UE being a UE equipped with two Rx branches, the cell is not barred for the RedCap UE,

wherein the cell barring information is configured to take one of two values indicating a barred state and a not barred state for the RedCap UE equipped with the one Rx branch,

wherein, based on the cell barring information indicating the barred state, the cell is identified by the RedCap UE equipped with the one Rx branch as barred when the cell is included in a four receive branch band, and the cell is identified by the RedCap UE equipped with the one Rx branch as not barred when the cell is included in a two receive branch band, and

wherein the four receive branch band requires a non-reduced capability UE to be equipped with at least four receive antenna ports, and the two receive branch band requires a non-reduced capability UE to be equipped with at least two receive antenna ports.

9 . A method of transmitting, by a base station (BS), a system information block 1 (SIB1) in a wireless communication system, the method comprising:

transmitting a master information block (MIB) to a reduced capability (RedCap) user equipment (UE) through a physical broadcast channel (PBCH);

transmitting downlink control information (DCI) to the RedCap UE based on the MIB; and

transmitting the SIB1 including cell barring information to the RedCap UE based on the DCI,

wherein the cell barring information represents whether to bar a cell based on a receive (Rx) branch of the RedCap UE,

wherein based on the RedCap UE being a UE equipped with one Rx branch, the cell is barred for the RedCap UE,

wherein based on the RedCap UE being a UE equipped with two Rx branches, the cell is not barred for the RedCap UE,

wherein the cell barring information is configured to take one of two values indicating a barred state and a not barred state for the RedCap UE equipped with the one Rx branch,

wherein, based on the cell barring information indicating the barred state, the cell is identified by the RedCap UE equipped with the one Rx branch as barred when the cell is included in a four receive branch band, and the cell is identified by the RedCap UE equipped with the one Rx branch as not barred when the cell is included in a two receive branch band,

wherein the four receive branch band requires a non-reduced capability UE to be equipped with at least four receive antenna ports, and the two receive branch band requires a non-reduced capability UE to be equipped with at least two receive antenna ports.

10 . The method of claim 9 , wherein the cell barring information is 1-bit information.

11 . The method of claim 9 , wherein based on the cell being barred, a cell search is performed by changing a frequency.

12 . The method of claim 9 , wherein the MIB includes information related to a control resource set (CORESET) #0.

13 . The method of claim 12 , wherein the DCI is transmitted on the CORESET #0.

14 . The method of claim 13 , wherein the DCI is related to DCI format 1 0 with cyclic redundancy check (CRC) scrambled by system information (SI)-radio network temporary identifier (RNTI).

15 . The method of claim 14 , wherein the SIB1 is transmitted through a physical downlink shared channel (PDSCH).