Method of transmitting synchronization signal and apparatus therefor
A method of transmitting a synchronization signal block, which is transmitted by a base station in a wireless communication system, is disclosed in the present invention. The method includes the steps of mapping a synchronization signal block including a PSS (primary synchronization signal), an SSS (secondary synchronization signal), and a PBCH (physical broadcasting channel) to a plurality of symbols, and transmitting the synchronization signal block mapped to a plurality of the symbols to a user equipment. In this case, in a symbol mapped the PSS, in a symbol mapped the SSS, and in a symbol mapped the PBCH, centers of subcarriers to which the PSS, the SSS, and the PBCH are mapped are the same and the number of subcarriers to which the PBCH is mapped is greater than the number of subcarriers to which the PSS and the SSS are mapped.
1. A method of transmitting a synchronization signal block, which is transmitted by a base station in a wireless communication system, the method comprising:
mapping a synchronization signal block containing a primary synchronization signal (PSS), an secondary synchronization signal (SSS), and a physical broadcasting channel (PBCH) to a plurality of symbols; and
transmitting the synchronization signal block mapped to the plurality of the symbols to a user equipment,
wherein, in a symbol to which the PSS is mapped, in a symbol to which the SSS is mapped, and in a symbol to which only the PBCH is mapped,
centers of subcarriers to which the PSS, the SSS, and the PBCH are mapped are the same, and
the number of subcarriers to which the PBCH is mapped is greater than the number of subcarriers to which the PSS and the SSS are mapped.
2. The method of claim 1 , wherein the PBCH is mapped to a plurality of symbols and wherein the symbol to which the SSS is mapped is located between symbols to which only the PBCH is mapped.
3. The method of claim 2 , wherein all of the symbols to which the PBCH is mapped comprise a plurality of DMRSs.
4. The method of claim 3 , wherein a plurality of the DMRSs are arranged with an equal interval in each of the symbols to which the PBCH is mapped.
5. The method of claim 1 , wherein subcarrier spacing for the SSS is identical to subcarrier spacing for the PBCH.
6. The method of claim 2 , wherein the SSS is mapped to at least one symbol among a plurality of the symbols to which the PBCH is mapped.
7. The method of claim 6 , wherein subcarriers to which the PBCH is mapped, in the at least one symbol to which the PBCH and the SSS are mapped, are located at the top or the bottom of a frequency axis of subcarriers to which the SSS is mapped.
8. The method of claim 1 , wherein the PSS, the SSS, and the PBCH are mapped to a plurality of contiguous symbols.
9. A method of receiving a synchronization signal block, which is received by a user equipment (UE) in a wireless communication system, the method comprising:
receiving, from a base station, a synchronization signal block,
wherein a primary synchronization signal (PSS), an secondary synchronization signal (SSS), and a physical broadcasting channel (PBCH) contained the synchronization signal block are mapped to a plurality of symbols; and
wherein, in a symbol to which the PSS is mapped, in a symbol to which the SSS is mapped, and in a symbol to which only the PBCH is mapped,
centers of subcarriers to which the PSS, the SSS, and the PBCH are mapped are the same, and
the number of subcarriers to which the PBCH is mapped is greater than the number of subcarriers to which the PSS and the SSS are mapped.
10. The method of claim 9 , wherein the PBCH is mapped to a plurality of symbols and wherein the symbol to which the SSS is mapped is located between symbols to which only the PBCH is mapped.
11. The method of claim 10 , wherein all of the symbols to which the PBCH is mapped comprise a plurality of DMRSs.
12. The method of claim 11 , wherein a plurality of the DMRSs are arranged with an equal interval in the symbols to which the PBCH is mapped.
13. The method of claim 10 , wherein the SSS is mapped to at least one symbol among a plurality of the symbols to which the PBCH is mapped.
14. The method of claim 13 , wherein subcarriers to which the PBCH is mapped, in the at least one symbol to which the PBCH and the SSS are mapped, are located at the top or the bottom of a frequency axis of subcarriers to which the SSS is mapped.
15. A user equipment (UE) receiving a synchronization signal block in a wireless communication system, the UE comprising:
an RF unit configured to transceive a radio signal with a base station; and
a processor connected with the RF unit configured to:
receive, from a base station, a synchronization signal block,
wherein a primary synchronization signal (PSS), an secondary synchronization signal (SSS), and a physical broadcasting channel (PBCH) contained the synchronization signal block are mapped to a plurality of symbols; and
wherein, in a symbol to which the PSS is mapped, in a symbol to which the SSS is mapped, and in a symbol to which only the PBCH is mapped,
centers of subcarriers to which the PSS, the SSS, and the PBCH are mapped are the same, and
the number of subcarriers to which the PBCH is mapped is greater than the number of subcarriers to which the PSS and the SSS are mapped.
16. The UE of claim 15 , wherein the PBCH is mapped to a plurality of symbols and wherein the symbol to which the SSS is mapped is located between symbols to which only the PBCH is mapped.
17. The UE of claim 16 , wherein all of the symbols to which the PBCH is mapped comprise a plurality of DMRSs.
18. The UE of claim 17 , wherein a plurality of the DMRSs are arranged with an equal interval in the symbols to which the PBCH is mapped.
19. The UE of claim 15 , wherein the SSS is mapped to at least one symbol among a plurality of the symbols to which the PBCH is mapped.
20. The UE of claim 19 , wherein subcarriers to which the PBCH is mapped, in the at least one symbol to which the PBCH and the SSS are mapped, are located at the top or the bottom of a frequency axis of subcarriers to which the SSS is mapped.