A method of initial access performed by a user equipment, UE, the method comprising: receiving, in a synchronization signal block, SSB, a master information block, MIB, for configuring a first control resource set, CORESET, with physical resource blocks, PRBs, of a first downlink, DL, bandwidth part, BWP; receiving a first radio resource control, RRC, configuration in the first DL BWP carrying a configuration for a first initial uplink, UL, BWP, and a second RRC configuration in the first DL BWP carrying a configuration for a second DL BWP, a second CORESET, a first search space associated with the second CORESET, and a second initial UL BWP; transmitting, to a cell, a physical random access channel, PRACH, preamble in the second initial UL BWP in a case that a bandwidth the first initial UL BWP is greater than a maximum UL channel bandwidth supported by the UE and a bandwidth of the second initial UL BWP is smaller than a maximum UL channel bandwidth supported by the UE; and receiving downlink control information, DCI, in the first search space and a physical downlink shared channel, PDSCH, carrying a random access response scheduled by the DCI in the second DL BWP in a case that a bandwidth the first DL BWP is greater than a maximum DL channel bandwidth supported by the UE and a bandwidth of the second DL BWP is smaller than a maximum DL channel bandwidth supported by the UE, wherein: the second DL BWP includes the second CORESET, the first DL BWP is linked to the first initial UL BWP, and the second DL BWP is linked to the second initial UL BWP. receiving, in a synchronization signal block, SSB, a master information block, MIB, for configuring a first control resource set, CORESET, with physical resource blocks, PRBs, of a first downlink, DL, bandwidth part, BWP; receiving a first radio resource control, RRC, configuration in the first DL BWP carrying a configuration for a first initial uplink, UL, BWP, and a second RRC configuration in the first DL BWP carrying a configuration for a second DL BWP, a second CORESET, a first search space associated with the second CORESET, and a second initial UL BWP; transmitting, to a cell, a physical random access channel, PRACH, preamble in the second initial UL BWP in a case that a bandwidth the first initial UL BWP is greater than a maximum UL channel bandwidth supported by the UE and a bandwidth of the second initial UL BWP is smaller than a maximum UL channel bandwidth supported by the UE; and receiving downlink control information, DCI, in the first search space and a physical downlink shared channel, PDSCH, carrying a random access response scheduled by the DCI in the second DL BWP in a case that a bandwidth the first DL BWP is greater than a maximum DL channel bandwidth supported by the UE and a bandwidth of the second DL BWP is smaller than a maximum DL channel bandwidth supported by the UE, wherein: the second DL BWP includes the second CORESET, the first DL BWP is linked to the first initial UL BWP, and the second DL BWP is linked to the second initial UL BWP. the second DL BWP includes the second CORESET, the first DL BWP is linked to the first initial UL BWP, and the second DL BWP is linked to the second initial UL BWP.