A method performed by a terminal for receiving system information, SI, in a new radio, NR, wireless communication system, wherein the SI is divided into minimum SI, MSI, and other SI, wherein the MSI comprises a master information block 1, MIB 1, and a master information block 2, MIB2, and wherein some contents of the MSI is in the MIB1 and remaining contents of the MSI is in the MIB2, the method comprising: acquiring, from a base station on a cell, the MIB1, wherein the MIB1 includes scheduling information for acquiring the MIB2, and cell barring information indicating whether the cell is barred or not, and wherein the MIB1 is broadcasted on a physical broadcast channel, PBCH; and determining whether the cell barring information in the MIB1 is enabled or disabled; in case that the cell barring information in the MIB1 is disabled, the method further comprises: acquiring, from the base station, the MIB2 based on the scheduling information included in the MIB1, wherein the MIB2 is broadcasted on a physical downlink shared channel, PDSCH, scheduled by a physical downlink control channel, PDCCH; in case that the MIB2 indicates that a random access preamble resource is reserved for requesting on demand system information, SI, and the on demand SI is required by the terminal, transmitting, to the base station, a random access preamble to request the on demand SI based on the random access preamble resource; in case that the MIB2 indicates that the random access preamble resource is not reserved for requesting the on demand SI and the on demand SI is required by the terminal, transmitting, to the base station, a message 3 to request the on demand SI; and receiving, from the base station, the requested on demand SI. acquiring, from a base station on a cell, the MIB1, wherein the MIB1 includes scheduling information for acquiring the MIB2, and cell barring information indicating whether the cell is barred or not, and wherein the MIB1 is broadcasted on a physical broadcast channel, PBCH; and determining whether the cell barring information in the MIB1 is enabled or disabled; in case that the cell barring information in the MIB1 is disabled, the method further comprises: acquiring, from the base station, the MIB2 based on the scheduling information included in the MIB1, wherein the MIB2 is broadcasted on a physical downlink shared channel, PDSCH, scheduled by a physical downlink control channel, PDCCH; in case that the MIB2 indicates that a random access preamble resource is reserved for requesting on demand system information, SI, and the on demand SI is required by the terminal, transmitting, to the base station, a random access preamble to request the on demand SI based on the random access preamble resource; in case that the MIB2 indicates that the random access preamble resource is not reserved for requesting the on demand SI and the on demand SI is required by the terminal, transmitting, to the base station, a message 3 to request the on demand SI; and receiving, from the base station, the requested on demand SI. acquiring, from the base station, the MIB2 based on the scheduling information included in the MIB1, wherein the MIB2 is broadcasted on a physical downlink shared channel, PDSCH, scheduled by a physical downlink control channel, PDCCH; in case that the MIB2 indicates that a random access preamble resource is reserved for requesting on demand system information, SI, and the on demand SI is required by the terminal, transmitting, to the base station, a random access preamble to request the on demand SI based on the random access preamble resource; in case that the MIB2 indicates that the random access preamble resource is not reserved for requesting the on demand SI and the on demand SI is required by the terminal, transmitting, to the base station, a message 3 to request the on demand SI; and receiving, from the base station, the requested on demand SI.