Method for transmitting synchronization signal and device therefor
The present invention discloses a method for a base station to transmit a synchronization signal block in a wireless communication system. Particularly, the method includes the steps of mapping a plurality of synchronization blocks to a plurality of symbols within a specific time unit, and transmitting a plurality of the synchronization signal blocks mapped to a plurality of the symbols to a user equipment. In this case, at least one synchronization signal block is mapped to each of half time units having a half-length of the specific time unit.
1. A method of transmitting a synchronization signal block (SSB) by a base station in a wireless communication system, the method comprising:
mapping the SSB to a transmission time interval (TTI), wherein the TTI has a duration of 14 symbols and consists of a first half TTI and a second half TTI each having a duration of 7 symbols, and wherein the SSB comprises a physical broadcast channel (PBCH), a primary synchronization signal (PSS), and a secondary synchronization signal (SSS); and
transmitting, to a user equipment (UE), the SSB,
wherein, in the TTI, (i) the first half TTI comprises a first resource region of 4 consecutive symbols for transmitting the SSB, and (ii) the second half TTI comprises a second resource region of 4 consecutive symbols for transmitting the SSB, and
wherein the SSB is mapped to the 4 consecutive symbols in the first resource region and to the 4 consecutive symbols in the second resource region so as not to overlap a boundary between the first half TTI and the second half TTI.
2. The method according to claim 1 , wherein the SSB is not mapped to a first two symbols among the 14 symbols of the TTI.
3. The method according to claim 1 , wherein the SSB is not mapped to a last two symbols among the 14 symbols of the TTI.
4. The method according to claim 1 , wherein each of the first resource region and the second resource region for transmitting the SSB is determined in units of the TTI and is repeatedly arranged in a same pattern during a plurality of TTIs.
5. A base station configured to transmit a synchronization signal block (SSB) in a wireless communication system, the base station comprising:
at least one radio-frequency (RF) module;
at least one processor; and
at least one computer memory operably connectable to the at least one processor and storing instructions that, when executed by the at least one processor, perform operations comprising:
mapping the SSB to a transmission time interval (TTI), wherein the TTI has a duration of 14 symbols and consists of a first half TTI and a second half TTI each having a duration of 7 symbols, and wherein the SSB comprises a physical broadcast channel (PBCH), a primary synchronization signal (PSS), and a secondary synchronization signal (SSS); and
transmitting, to a user equipment (UE) through the at least one RF module, the SSB,
wherein, in the TTI, (i) the first half TTI comprises a first resource region of 4 consecutive symbols for transmitting the SSB, and (ii) the second half TTI comprises a second resource region of 4 consecutive symbols for transmitting the SSB, and
wherein the SSB is mapped to the 4 consecutive symbols in the first resource region and to the 4 consecutive symbols in the second resource region so as not to overlap a boundary between the first half TTI and the second half TTI.
6. The base station according to claim 5 , wherein the SSB is not mapped to a first two symbols among the 14 symbols of the TTI.
7. The base station according to claim 5 , wherein the SSB is not mapped to a last two symbols among the 14 symbols of the TTI.
8. The base station according to claim 5 , wherein each of the first resource region and the second resource region for transmitting the SSB is determined in units of the TTI and is repeatedly arranged in a same pattern during a plurality of TTIs.
9. The method according to claim 1 , wherein each of the first half TTI and the second half TTI includes at most one group of 4 consecutive symbols to which the SSB can be mapped.
10. The base station according to claim 5 , wherein each of the first half TTI and the second half TTI includes at most one group of 4 consecutive symbols to which the SSB can be mapped.
11. At least one non-transitory tangible computer-readable storage medium storing computer instructions that, when executed by at least one processor, control a communication device to perform operations of transmitting a synchronization signal block (SSB) in a wireless communication system, the operations comprising:
mapping the SSB to a transmission time interval (TTI), wherein the TTI has a duration comprises a plurality of 14 symbols and consists of a first half TTI and a second half TTI each having a duration of 7 symbols, and wherein the SSB comprises a physical broadcast channel (PBCH), a primary synchronization signal (PSS), and a secondary synchronization signal (SSS); and
transmitting, to a user equipment (UE), the SSB,
wherein, in the TTI, (i) the first half TTI comprises a first resource region of 4 consecutive symbols for transmitting the SSB, and (ii) the second half TTI comprises a second resource region of 4 consecutive symbols for transmitting the SSB, and
wherein the SSB is mapped to the 4 consecutive symbols in the first resource region and to the 4 consecutive symbols in the second resource region so as not to overlap a boundary between the first half TTI and the second half TTI.
12. The at least one non-transitory tangible computer-readable storage medium according to claim 11 , wherein the SSB is not mapped to a first two symbols among the 14 symbols of the TTI.
13. The at least one non-transitory tangible computer-readable storage medium according to claim 11 , wherein the SSB is not mapped to a last two symbols among the 14 symbols of the TTI.
14. The at least one non-transitory tangible computer-readable storage medium according to claim 11 , wherein each of the first resource region and the second resource region for transmitting the SSB is determined in units of the TTI and is repeatedly arranged in a same pattern during a plurality of TTIs.
15. The at least one non-transitory tangible computer-readable storage medium according to claim 11 , wherein each of the first half TTI and the second half TTI includes at most one group of 4 consecutive symbols to which the SSB can be mapped.