Method and apparatus for indicating initial access subcarrier spacing in wireless cellular communication system

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

• transmitting, to a terminal, a primary synchronization signal (PSS) and a secondary synchronization signal (SSS) based on a first subcarrier spacing;
• transmitting, to the terminal, a master information block (MIB) based on the first subcarrier spacing, the MIB including information associated with a second subcarrier spacing;
• transmitting, to the terminal, a system information block 1 (SIB1) based on the second subcarrier spacing, the SIB1 including information associated with a third subcarrier spacing;
• receiving, from the terminal, a random access preamble based on the third subcarrier spacing;
• and
• transmitting, to the terminal, a random access response based on the second subcarrier spacing as a response to the random access preamble.

A terminal in a wireless communication system, the terminal comprising:

• a transceiver configured to transmit and receive a signal;
• and
• a controller configured to:
• receive, from a base station, a primary synchronization signal (PSS) and a secondary synchronization signal (SSS) based on a first subcarrier spacing,
• receive, from the base station, a master information block (MIB) based on the first subcarrier spacing, the MIB including information associated with a second subcarrier spacing,
• receive, from the base station, a system information block 1 (SIB1) based on the second subcarrier spacing, the SIB1 including information associated with a third subcarrier spacing,
• transmit, to the base station, a random access preamble based on the third subcarrier spacing, and
• receive, from the base station, a random access response based on the second subcarrier spacing as a response to the random access preamble.

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

• a transceiver configured to transmit and receive a signal;
• and
• a controller configured to:
• transmit, to a terminal, a primary synchronization signal (PSS) and a secondary synchronization signal (SSS) based on a first subcarrier spacing,
• transmit, to the terminal, a master information block (MIB) based on the first subcarrier spacing, the MIB including information associated with a second subcarrier spacing,
• transmit, to the terminal, a system information block 1 (SIB1) based on the second subcarrier spacing, the SIB1 including information associated with a third subcarrier spacing,
• receive, from the terminal, a random access preamble based on the third subcarrier spacing, and
• transmit, to the terminal, a random access response based on the second subcarrier spacing as a response to the random access preamble.