A method of system information transmissions performed by a user equipment, UE, the method comprising: receiving, from a base station, BS, a system information, SI, scheduling information list for a plurality of SI messages and a random access resource list for a plurality of SI requests via a system information block type 1, SIB1, wherein each entry of the SI scheduling information list comprises an SI broadcast status indication of whether an SI message of the plurality of SI messages is on-demand or broadcast; determining, when a plurality of random access resource entries exist in the random access resource list for the plurality of SI requests including a first SI request and a second SI request, that a first entry of the plurality of random access resource entries in the random access resource list for the first SI request corresponds to a first entry in the SI scheduling information list, the SI broadcast status indication being configured as on-demand in the first entry in the SI scheduling information list, and that a second entry of the plurality of random access resource entries in the random access resource list for the second SI request corresponds to a second entry in the SI scheduling information list, the SI broadcast status indication being configured as on-demand in the second entry in the SI scheduling information list; applying a default configuration for the first SI request and the second SI request, the default configuration being a first configuration used for an initial access or a second configuration set specifically for the first SI request and the second SI request, wherein the default configuration includes at least one of a physical layer configuration, a Medium Access Control, MAC, configuration and a semi-persistent scheduling configuration; and transmitting, to the BS, the first SI request and the second SI request. receiving, from a base station, BS, a system information, SI, scheduling information list for a plurality of SI messages and a random access resource list for a plurality of SI requests via a system information block type 1, SIB1, wherein each entry of the SI scheduling information list comprises an SI broadcast status indication of whether an SI message of the plurality of SI messages is on-demand or broadcast; determining, when a plurality of random access resource entries exist in the random access resource list for the plurality of SI requests including a first SI request and a second SI request, that a first entry of the plurality of random access resource entries in the random access resource list for the first SI request corresponds to a first entry in the SI scheduling information list, the SI broadcast status indication being configured as on-demand in the first entry in the SI scheduling information list, and that a second entry of the plurality of random access resource entries in the random access resource list for the second SI request corresponds to a second entry in the SI scheduling information list, the SI broadcast status indication being configured as on-demand in the second entry in the SI scheduling information list; applying a default configuration for the first SI request and the second SI request, the default configuration being a first configuration used for an initial access or a second configuration set specifically for the first SI request and the second SI request, wherein the default configuration includes at least one of a physical layer configuration, a Medium Access Control, MAC, configuration and a semi-persistent scheduling configuration; and transmitting, to the BS, the first SI request and the second SI request.