Method and apparatus for system information acquisition in wireless communication system

A method performed by a base station, in wireless communication system, the method comprising:

• transmitting, to a user equipment (UE), system information, SI, for an initial access, the SI including information associated with one or more other SI;
• receiving, from the UE, a preamble for a random access;
• transmitting, to the UE, a random access response as a response to the preamble for the random access, the random access response including an uplink grant;
• receiving, from the UE, an uplink message based on the uplink grant, wherein the uplink message includes information for indicating other SI, and the other SI is identified based on the information associated with one or more other SI included in the SI for the initial access;
• and
• transmitting, to the UE, the other SI corresponding to the information for indicating other SI.

A user equipment (UE) comprising:

• a communication module;
• and
• a processor module configured to control to:
• receive, from a base station via the communication module, system information, SI, for an initial access, the SI including information associated with one or more other SI,
• transmit, to the base station via the communication module, a preamble for a random access,
• receive, from the base station via the communication module, a random access response as a response to the preamble for the random access, the random access response including an uplink grant,
• transmit, to the base station via the communication module, an uplink message based on the uplink grant, wherein the uplink message includes information for indicating other SI, and the other SI is identified based on the information associated with one or more other SI included in the SI for the initial access, and
• receive, from the base station via the communication module, the other SI corresponding to the information for indicating other SI.

A base station comprising:

• a communication module;
• and
• a processor module configured to control to:
• transmit, to a user equipment (UE) via the communication module, system information, SI, for an initial access, the SI including information associated with one or more other SI,
• receive, from the UE via the communication module, a preamble for a random access,
• transmit, to the UE via the communication module, a random access response as a response to the preamble for the random access, the random access response including an uplink grant,
• receive, from the UE via the communication module, an uplink message based on the uplink grant, wherein the uplink message includes information for indicating other SI, and the other SI is identified based on the information associated with one or more other SI included in the SI for the initial access, and
• transmit, to the UE via the communication module, the other SI corresponding to the information for indicating other SI.