Method and apparatus of flexible data transmissions and receptions in next generation cellular networks

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

• transmitting, to a terminal, a master information block (MIB) on a carrier frequency in a frequency range (FR), the MIB including information associated with a subcarrier spacing for a physical downlink control channel (PDCCH);
• and
• transmitting, to the terminal, the PDCCH based on the subcarrier spacing,
• wherein one of a first subcarrier spacing set and second subcarrier spacing set is indicated based on the FR, wherein each of the first subcarrier spacing set and the second subcarrier spacing set includes a lower subcarrier spacing and a higher subcarrier spacing, and
• wherein the subcarrier spacing is one of the lower subcarrier spacing and the higher subcarrier spacing of the first subcarrier spacing set or the second subcarrier spacing set, and the subcarrier spacing is indicated based on the information included in the MIB.

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 master information block (MIB) on a carrier frequency in a frequency range (FR), the MIB including information associated with a subcarrier spacing for a physical downlink control channel (PDCCH),
• based on the FR, identify one of a first subcarrier spacing set and a second subcarrier spacing set, wherein each of the first subcarrier spacing set and the second subcarrier spacing set includes a lower subcarrier spacing and a higher subcarrier spacing,
• based on the information included in the MIB, identify one subcarrier spacing among the lower subcarrier spacing and the higher subcarrier spacing of the first subcarrier spacing set or the second subcarrier spacing set, and
• receive, from the base station, the PDCCH based on the identified subcarrier spacing.

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 master information block (MIB) on a carrier frequency in a frequency range (FR), the MIB including information associated with a subcarrier spacing for a physical downlink control channel (PDCCH), and
• transmit, to the terminal, the PDCCH based on the subcarrier spacing,
• wherein one of a first subcarrier spacing set and second subcarrier spacing set is indicated based on the FR, wherein each of the first subcarrier spacing set and the second subcarrier spacing set includes a lower subcarrier spacing and a higher subcarrier spacing, and
• wherein the subcarrier spacing is one of the lower subcarrier spacing and the higher subcarrier spacing of the first subcarrier spacing set or the second subcarrier spacing set, and the subcarrier spacing is indicated based on the information included in the MIB.