Method for transceiving signal in a wireless communication system and apparatus for the same

1. A method for transceiving a signal in a wireless communication system supporting narrow-band (NB)-LTE, which is performed a terminal, the method performed by a terminal and comprising:

receiving, from a base station, a narrow band synchronization signal;

acquiring time synchronization and frequency synchronization with the base station based on the narrow band synchronization signal and detecting an identifier of the base station; and

receiving, from the base station, broadcast information based on the detected identifier of the base station,

wherein the narrow band synchronization signal and the broadcast information are received through a narrow band (NB),

wherein the narrow band has a system bandwidth of 180 kHz and includes 12 subcarriers disposed at an interval of 15 kHz,

wherein the narrow band synchronization signal includes a narrow band primary synchronization signal and a narrow band secondary synchronization signal,

wherein the narrow band primary synchronization signal and the narrow band secondary synchronization signal are transmitted in different subframes, and

wherein the broadcast information is transmitted in a first subframe of a radio frame.

2. The method of claim 1 , wherein the narrow band primary synchronization signal is transmitted in a 6th subframe of the radio frame.

3. The method of claim 1 , wherein the narrow band synchronization signal and the broadcast information are not transmitted in at least one resource in which a reference signal (RS) is transmitted.

4. The method of claim 2 , wherein the narrow band synchronization signal and the broadcast information are not transmitted in first three symbols of the first subframe and the sixth subframe.

5. The method of claim 2 , wherein the first subframe and the sixth subframe are subframes which are not configured as a multicast broadcast single frequency network (MBSFN).

6. The method of claim 1 , wherein transmission periods of the narrow band primary synchronization signal and the narrow band secondary synchronization signal are set to be different from each other.

7. The method of claim 6 , wherein the transmission period of the narrow band secondary synchronization signal is set to 20 ms.

8. The method of claim 1 , wherein the narrow band synchronization signal and the broadcast information are transmitted through 11 orthogonal frequency division multiple access (OFDM) symbols.

9. The method of claim 8 , wherein the narrow band secondary synchronization signal is transmitted through 12 subcarriers.

10. The method of claim 1 , further comprising:

checking a frame structure type supported by the base station based on at least one of the narrow band synchronization signal and the broadcast information.

11. The method of claim 10 , wherein the narrow band synchronization signal is generated by using a Zadoff-Chu (ZC) sequence.

12. The method of claim 11 , wherein the narrow band primary synchronization signal is generated based on a first ZC sequence and a second ZC sequence having different root indexes.

13. The method of claim 12 , wherein the first ZC sequence and the second ZC sequence are mapped to symbols to which the narrow band primary synchronization signal, respectively.

14. The method of claim 13 , wherein the frame structure type supported by the base station is distinguished according to the order in which the first ZC sequence and the second ZC sequence are mapped to the symbols, respectively.

15. The method of claim 11 , wherein the narrow band primary synchronization signal is generated based on a ZC sequence having a specific length, and

the ZC sequence having the specific length is mapped to the symbols in which the narrow band primary synchronization signal is transmitted.

16. A terminal for transceiving a signal in a wireless communication system supporting narrow-band (NB)-LTE, the terminal comprising:

a radio frequency (RF) unit configured to transceive a wireless signal; and

a processor functionally connected with the RF unit,

wherein the processor is configured to:

receive, from a base station a narrow band synchronization signal,

acquire time synchronization and frequency synchronization with the base station based on the narrow band synchronization signal and detect an identifier of the base station, and

receive, from the base station, broadcast information based on the detected identifier of the base station,

wherein the narrow band synchronization signal and the broadcast information are received through a narrow band (NB),

wherein the narrow band has a system bandwidth of 180 kHz and includes 12 subcarriers disposed at an interval of 15 kHz,

wherein the narrow band synchronization signal includes a narrow band primary synchronization signal and a narrow band secondary synchronization signal,

wherein the narrow band primary synchronization signal and the narrow band secondary synchronization signal are transmitted in different subframes, and

wherein the broadcast information is transmitted in a first subframe of a radio frame.