Apparatus and method for signaling system information

A method for transmitting system information (SI) by a base station (BS) in a wireless communication system, the method comprising:

• transmitting, to a user equipment (UE), minimum SI which is broadcasted periodically, the minimum SI including information indicating whether a SI message for other SI is broadcast periodically or provisioned on demand and configuration information on a physical random access channel (PRACH), wherein the configuration information includes information on PRACH resource for the other SI and information on a PRACH preamble corresponding to each SI message for the other SI;
• in a case that the information indicates that the SI message for the other SI is provisioned on demand, receiving, from the UE, a PRACH preamble corresponding to the SI message based on the configuration information;
• and
• transmitting, to the UE, the SI message for the other SI in response to the PRACH preamble.

A user equipment (UE) for receiving system information (SI) in a wireless communication system, the UE comprising:

• a transceiver;
• and
• at least one processor coupled with the transceiver and configured to control to:
• receive, from a base station (BS), minimum SI which is broadcasted periodically, the minimum SI including information indicating whether a SI message for other SI is broadcast periodically or provisioned on demand and configuration information on a physical random access channel (PRACH), wherein the configuration information includes information on PRACH resource for the other SI and information on a PRACH preamble corresponding to each SI message for the other SI,
• in a case that the information indicates that the SI message for the other SI is provisioned on demand, transmit, to the BS, a PRACH preamble corresponding to the SI message based on the configuration information, and
• receive, from the BS, the SI message for the other SI in response to the PRACH preamble.

A base station (BS) for transmitting system information (SI) in a wireless communication system, the BS comprising:

• a transceiver;
• and
• at least one processor coupled with the transceiver and configured to control to:
• transmit, to a user equipment (UE), minimum SI which is broadcasted periodically, the minimum SI including information indicating whether a SI message for other SI is broadcast periodically or provisioned on demand and configuration information on a physical random access channel (PRACH), wherein the configuration information includes information on PRACH resource for the other SI and information on a PRACH preamble corresponding to each SI message for the other SI,
• in a case that the information indicates that the SI message for the other SI is provisioned on demand, receive, from the UE, a PRACH preamble corresponding to the SI message based on the configuration information, and
• transmit, to the UE, the SI message for the other SI in response to the PRACH preamble.