Method for transmitting and receiving signals for wireless communication, and apparatus therefor
A terminal for performing an initial cell access, according to an embodiment of the present disclosure, receives a PBCH signal of a first cell via a cell search, receives SIB1-scheduling information on a CSS set related to the PBCH signal, and determines whether to perform a remaining access procedure on the first cell, on the basis of the SIB1-scheduling information, wherein the terminal is a second type terminal in which the capability is reduced to support a bandwidth narrower than that of a first type terminal, and the terminal may determine, as the second type terminal, whether an access to the first cell is allowed, on the basis of the state of a bit reserved so as not to be used by the first type terminal within the SIB1-scheduling information.
1 . A method performed by a user equipment (UE), the method comprising:
receiving a physical broadcast channel (PBCH) signal of a first cell through cell search;
receiving, based on the PBCH signal, downlink control information (DCI) for scheduling a system information block 1 (SIB1) of the first cell; and
determining whether to receive the SIB1 of the first cell based on the DCI,
wherein the UE is a second type UE with reduced capability to support a narrower bandwidth than a first type UE,
wherein the DCI includes reserved bits, and the reserved bits are used for the second type UE,
wherein the UE determines whether to receive the SIB1 of the first cell based on the reserved bits in the DCI, and
wherein based on that the reserved bits do not have a first value, the SIB1 of the first cell includes both (i) first SIB1 information related to the first type UE and (ii) second SIB1 information dedicated to the second type UE.
2 . The method of claim 1 , wherein based on whether the reserved bits have the first value, the UE determines whether to receive the SIB1 of the first cell or to search for a second cell without receiving the SIB1 of the first cell.
3 . The method of claim 2 , wherein based on that the reserved bits do not have the first value, the UE determines to receive the SIB1 of the first cell.
4 . The method of claim 1 , further comprising:
receiving the second SIB1 information,
wherein the UE determines a resource location of the second SIB1 information based on a resource location of the first SIB1 information.
5 . The method of claim 4 , wherein the UE obtains an offset between the resource location of the first SIB1 information and the resource location of the second SIB1 information based on the reserved bits.
6 . The method of claim 1 , wherein the DCI is received in a physical downlink control channel (PDCCH)-common search space (CSS) set shared between the first type UE and the second type UE.
7 . A non-transitory processor-readable storage medium configured to store a program for executing the method of claim 1 .
8 . A device comprising:
a memory configured to store instructions; and
a processor configured to execute the instructions to:
receive a physical broadcast channel (PBCH) signal of a first cell through cell search;
receive, based on the PBCH signal, downlink control information (DCI) for scheduling a system information block 1 (SIB1) of the first cell; and
determine whether to receive the SIB1 of the first cell based on the DCI,
wherein the device is a second type device with reduced capability to support a narrower bandwidth than a first type device,
wherein the DCI includes reserved bits which are not used for the first type device,
wherein the device determines whether to receive the SIB1 of the first cell based on the reserved bits in the DCI, and
wherein based on that the reserved bits do not have a first value, the SIB1 of the first cell includes both (i) first SIB1 information related to the first type device and (ii) second SIB1 information dedicated to the second type device.
9 . The device of claim 8 , further comprising:
a transceiver configured to transmit and receive a radio signal under control of the processor,
wherein the device is a user equipment (UE).
10 . The device of claim 8 , wherein the device is an application-specific integrated circuit (ASIC) or a digital signal processing device.
11 . A method performed by a base station, the method comprising:
transmitting a physical broadcast channel (PBCH) signal through a first cell; and
transmitting, based on the PBCH signal, downlink control information (DCI) for scheduling a system information block 1 (SIB1) of the first cell,
wherein the base station is configured to support a second type user equipment (UE) on at least one cell, wherein the second type UE has reduced capability to support a narrower bandwidth than a first type UE,
wherein the DCI includes reserved bits, and the reserved bits are used for the second type UE,
wherein the base station indicates, based on the reserved bits in the DCI, whether the second type UE should receive the SIB1 of the first cell, and
wherein based on that the reserved bits do not have a first value, the SIB1 of the first cell includes both (i) first SIB1 information related to the first type UE and (ii) second SIB1 information dedicated to the second type UE.
12 . A base station comprising:
a memory configured to store instructions; and
a processor configured to execute the instructions to:
transmit a physical broadcast channel (PBCH) signal through a first cell; and
transmit, based on the PBCH signal, downlink control information (DCI) for scheduling a system information block 1 (SIB1) of the first cell,
wherein the processor is configured to support a second type user equipment (UE) on at least one cell, wherein the second type UE has reduced capability to support a narrower bandwidth than a first type UE,
wherein the DCI includes reserved bits, and the reserved bits are used for the second type UE, and
wherein the processor is configured to indicate, based on the reserved bits in the DCI, whether the second type UE should receive the SIB1 of the first cell, and
wherein based on that the reserved bits do not have a first value, the SIB1 of the first cell includes both (i) first SIB1 information related to the first type UE and (ii) second SIB1 information dedicated to the second type UE.