Method for receiving system information in wireless communication system that supports narrowband IoT and apparatus for the same

1. A method for receiving downlink data in a wireless communication system supporting a Narrow Band (NB)-Internet of Things (IoT), the method performed by a terminal comprising:

receiving a narrowband synchronization signal (NBSS) on a first NB-IoT carrier from a base station;

acquiring, based on the NBSS, time synchronization and frequency synchronization with the base station;

receiving system information related to the NB-IoT on the first NB-IoT carrier from the base station;

receiving information for a second NB-IoT carrier through a high layer signaling from the base station;

receiving the downlink data on at least one of the first NB-IoT carrier or the second NB-IoT carrier from the base station,

wherein the information for the second NB-IoT carrier further includes control information related to a physical resource block (PRB) index of the second NB-IoT carrier.

2. The method of claim 1 , wherein the control information is information indicating a frequency difference between a center frequency of the second NB-IoT carrier and a Direct Current (DC).

3. The method of claim 2 , wherein the control information includes 100 state values.

4. The method of claim 2 , wherein the information of the second NB-IoT carrier includes at least one of first information indicating an operation mode of the second NB-IoT carrier or second information indicating whether the second NB-IoT carrier has same Physical Cell ID (PCID) as a legacy carrier.

5. The method of claim 1 ,

wherein the first NB-IoT carrier is an anchor PRB, and

wherein the second NB-IoT carrier is a configured PRB.

6. The method of claim 1 , wherein the system information includes at least one of operation mode information that represents an operation mode of the NB-IoT system or a channel raster offset indicator that represents a channel raster offset.

7. The method of claim 1 , wherein the narrowband synchronization signal includes a narrowband primary synchronization signal and a narrowband secondary synchronization signal.

8. The method of claim 1 , wherein the narrowband is a system bandwidth that corresponds to 1 Physical Resource Block (PRB) of Long Term Evolution (LTE) system.

9. The method of claim 8 , wherein the 1 PRB includes 12 subcarriers.

10. The method of claim 9 , wherein the narrowband primary synchronization signal is received through 11 consecutive subcarriers among the 12 subcarriers.

11. The method of claim 10 , wherein the 11 consecutive subcarriers are configured by excluding a specific subcarrier among the 12 subcarriers.

12. The method of claim 11 , wherein the specific subcarrier is a subcarrier with the lowest subcarrier index or the highest subcarrier index.

13. A terminal for receiving downlink data in a wireless communication system supporting a Narrow Band (NB)-Internet of Things (IoT), comprising:

a Radio Frequency (RF) unit including a transceiver for transmitting and receiving a radio signal; and

a processor for controlling the RF unit,

wherein the processor is configured to perform:

receiving a narrowband synchronization signal (NBSS) on a first NB-IoT carrier from a base station;

acquiring, based on the NBSS, time synchronization and frequency synchronization with the base station;

receiving system information related to the NB-IoT on the first NB-IoT carrier from the base station;

receiving information for a second NB-IoT carrier through a high layer signaling from the base station; and

receiving the downlink data on at least one of the first NB-IoT carrier or the second NB-IoT carrier from the base station,

wherein the information for the second NB-IoT carrier further includes control information related to a physical resource block (PRB) index of the second NB-IoT carrier.