Method and apparatus for transmitting a discovery signal, and method and apparatus for receiving a discovery signal

1. A method for transmitting discovery signals, performed in a base station, the method comprising:

determining M discovery signal resources from a discovery signal resource pool, wherein a part or all of resources belonging to the discovery signal resource pool are determined as the M discovery signal resources, wherein M is a natural number equal to or greater than 1;

generating M discovery signal blocks, each of the M discovery signal blocks including a primary synchronization signal (PSS), a secondary synchronization signal (SSS) and a physical broadcast channel (PBCH), and a reference signal for demodulation of the PBCH; and

transmitting a m-th discovery signal block through a m-th discovery signal resource among the M discovery signal resources, wherein m is a natural number from 1 to M,

wherein each of the M discovery signal resources consists of a same number of symbol(s) and a same number of subcarriers regardless of m, and positions of resources to which the PSS, the SSS, the PBCH, and the reference signal are mapped within each of the M discovery signal resources are same across the M discovery signal blocks regardless of m.

2. The method according to claim 1 , wherein each of the M discovery signal resources has a frequency resource region identical to a frequency resource region of the discovery signal resource pool.

3. The method according to claim 1 , wherein the discovery signal resource pool includes L discovery signal resources, wherein the M discovery signal resources are determined from the L discovery signal resources and L is a natural number equal to or greater than M.

4. The method according to claim 1 , wherein each of the M discovery signal blocks further includes at least one guard subcarrier at edges of a bandwidth of the PSS in symbol(s) to which the PSS is mapped.

5. The method according to claim 1 , wherein the symbol(s) to which the PSS is mapped is earlier than the symbol(s) to which the SSS is mapped in each of the M discovery signal blocks.

6. The method according to claim 1 , wherein the M discovery signal blocks are periodically transmitted through the M discovery signal resources.

7. The method according to claim 1 , wherein antenna port(s) for the PSS, the SSS, the PBCH, and the reference signal constituting the m-th discovery signal block are same.

8. The method according to claim 1 , wherein a time distance between two discovery signal blocks among the M discovery signal blocks in the discovery signal resource pool is a positive integer number of symbol(s).

9. The method according to claim 1 , further comprising providing a terminal with measurement configuration information including a time duration and a periodicity of a measurement window in which the terminal performs measurement based on at least a part of the M discovery signal blocks.

10. The method according to claim 9 , wherein the measurement performed in the measurement window by the terminal is for radio resource management or beam acquisition.

11. A method for receiving discovery signals, performed in a terminal, the method comprising:

receiving a primary synchronization signal (PSS) and a secondary synchronization signal (SSS) belonging to a discovery signal block among M discovery signal blocks through a discovery signal resource among M discovery signal resources belonging to a discovery signal resource pool, wherein M is a natural number equal to or greater than 1; and

receiving a physical broadcast channel (PBCH) and a reference signal for demodulation of the PBCH from the discovery signal block through the discovery signal resource where the terminal received the PSS and the SSS,

wherein a m-th discovery signal block is transmitted through a m-th discovery signal resource among the M discovery signal resources, m is a natural number from 1 to M, each of the M discovery signal resources consists of a same number of symbol(s) and a same number of subcarriers regardless of m, and positions of resources to which the PSS, the SSS, the PBCH, and the reference signal are mapped within each of the M discovery signal resources are same across the M discovery signal blocks regardless of m.

12. The method according to claim 11 , wherein each of the M discovery signal resources has a frequency resource region identical to a frequency resource region of the discovery signal resource pool.

13. The method according to claim 11 , wherein the discovery signal resource pool includes L discovery signal resources, wherein the M discovery signal resources are determined from the L discovery signal resources and L is a natural number equal to or greater than M.

14. The method according to claim 11 , wherein the terminal receives the PSS, the SSS, and PBCH, and the reference signal without knowledge about M.

15. The method according to claim 11 , wherein each of the M discovery signal blocks further includes at least one guard subcarrier at edges of a bandwidth of the PSS in symbol(s) to which the PSS is mapped.

16. The method according to claim 11 , wherein the symbol(s) to which the PSS is mapped is earlier than the symbol(s) to which the SSS is mapped in each of the M discovery signal blocks.

17. The method according to claim 11 , wherein the terminal assumes that the M discovery signal blocks are periodically transmitted through the M discovery signal resources.

18. The method according to claim 11 , wherein antenna port(s) for the PSS, the SSS, the PBCH, and the reference signal constituting the m-th discovery signal block are same.

19. The method according to claim 11 , further comprising receiving from a base station measurement configuration information including a time duration and a periodicity of a measurement window in which the terminal performs measurement based on at least a part of the M discovery signal blocks.

20. The method according to claim 19 , wherein the terminal performs the measurement in the measurement window for radio resource management or beam acquisition.