Operation method of terminal and base station in wireless communication system supporting unlicensed band, and apparatus supporting same
The present disclosure provides an operation method of a terminal and a base station in a wireless communication system supporting an unlicensed band, and an apparatus supporting same. As a specific example, the present disclosure comprises an operation method of a terminal and an operation method of a base station corresponding thereto, by which a terminal can obtain timing information relating to a unlicensed band on the basis of a PBCH payload in a synchronization signal/physical broadcast channel (SS/PBCH) block and a demodulation reference signal (DMRS) sequence for the PBCH.
1. A method of receiving a Synchronization Signal/Physical Broadcast Channel (SS/PBCH) block by a user equipment (UE) in a wireless communication system, the method comprising:
receiving a first SS/PBCH block including a first Demodulation Reference Signal (DM-RS) sequence and a first PBCH; and
acquiring system information based on the first PBCH,
wherein based on a first operation value related to an index of the first DM-RS sequence being the same with a second operation value related to an index of a second DM-RS sequence, the UE determines that the first SS/PBCH block is associated with a second SS/PBCH block, and
wherein the second DM-RS sequence is included in the second SS/PBCH block.
2. The method of claim 1 , wherein the first operation value is acquired based on modulo operation of the first DM-RS sequence, and
wherein the second operation value is acquired based on modulo operation of the second DM-RS sequence.
3. The method of claim 1 , wherein an index of the first SS/PBCH block is identical to an index of the second SS/PBCH block based on the first operation value being the same with the second operation value.
4. The method of claim 1 , wherein the first SS/PBCH block and the second SS/PBCH block are received across transmission windows for SS/PBCH block burst.
5. The method of claim 1 , further comprising:
acquiring a time synchronization with a cell based on the first SS/PBCH block being associated with the second SS/PBCH block.
6. A user equipment (UE) configured to receive a Synchronization Signal/Physical Broadcast Channel (SS/PBCH) block in a wireless communication system, the UE comprising:
at least one transceiver;
at least one processor; and
at least one computer memory operably connectable to the at least one processor and storing instructions that, when executed, cause the at least one processor to perform operations comprising:
receiving, via the at least one transceiver, a first SS/PBCH block including a first Demodulation Reference Signal (DM-RS) sequence and a first PBCH; and
acquiring system information based on the first PBCH,
wherein based on a first operation value related to an index of the first DM-RS sequence being the same with a second operation value related to an index of a second DM-RS sequence, the UE determines that the first SS/PBCH block is associated with a second SS/PBCH block, and
wherein the second DM-RS sequence is included in the second SS/PBCH block.
7. The UE of claim 6 , wherein the first operation value is acquired based on modulo operation of the first DM-RS sequence, and
wherein the second operation value is acquired based on modulo operation of the second DM-RS sequence.
8. The UE of claim 6 , wherein an index of the first SS/PBCH block is identical to an index of the second SS/PBCH block based on the first operation value being the same with the second operation value.
9. The UE of claim 6 , wherein the first SS/PBCH block and the second SS/PBCH block are received across transmission windows for SS/PBCH block burst.
10. The UE of claim 6 , wherein the operations further comprising:
acquiring a time synchronization with a cell based on the first SS/PBCH block being associated with the second SS/PBCH block.
11. An apparatus configured to acquire time synchronization with a cell in a wireless communication system, the apparatus comprising:
at least one processor; and
at least one computer memory operably connectable to the at least one processor and storing instructions that, when executed, cause the at least one processor to perform operations comprising:
receiving a first SS/PBCH block including a first Demodulation Reference Signal (DM-RS) sequence and a first PBCH; and
acquiring system information based on the first PBCH,
wherein based on a first operation value related to an index of the first DM-RS sequence being the same with a second operation value related to an index of a second DM-RS sequence, the apparatus determines that the first SS/PBCH block is associated with a second SS/PBCH block, and
wherein the second DM-RS sequence is included in the second SS/PBCH block.
12. A method of transmitting a Synchronization Signal/Physical Broadcast Channel (SS/PBCH) block by a base station (BS) in a wireless communication system, the method comprising:
transmitting a first SS/PBCH block including a first Demodulation Reference Signal (DM-RS) sequence and a first PBCH,
wherein system information is acquired by a user equipment (UE) based on the first PBCH,
wherein based on a first operation value related to an index of the first DM-RS sequence being the same with a second operation value related to an index of a second DM-RS sequence, the first SS/PBCH block is associated with a second SS/PBCH block, and
wherein the second DM-RS sequence is included in the second SS/PBCH block.
13. A base station (BS) configured to transmit a Synchronization Signal/Physical Broadcast Channel (SS/PBCH) block in a wireless communication system, the BS comprising:
at least one transceiver;
at least one processor; and
at least one computer memory operably connectable to the at least one processor and storing instructions that, when executed, cause the at least one processor to perform operations comprising:
transmitting, via the at least one transceiver, a first SS/PBCH block including a first Demodulation Reference Signal (DM-RS) sequence and a first PBCH,
wherein system information is acquired by a user equipment (UE) based on the first PBCH,
wherein based on a first operation value related to an index of the first DM-RS sequence being the same with a second operation value related to an index of a second DM-RS sequence, the first SS/PBCH block is associated with a second SS/PBCH block, and
wherein the second DM-RS sequence is included in the second SS/PBCH block.
14. A non-transitory medium which is readable by a processor and storing instructions that cause the processor to control a user equipment (UE) in a wireless communication system to perform operations comprising:
receiving a first Synchronization Signal/Physical Broadcast Channel (SS/PBCH) block including a first Demodulation Reference Signal (DM-RS) sequence and a first PBCH; and
acquiring system information based on the first PBCH,
wherein based on a first operation value related to an index of the first DM-RS sequence being the same with a second operation value related to an index of a second DM-RS sequence, the UE determines that the first SS/PBCH block is associated with a second SS/PBCH block, and
wherein the second DM-RS sequence is included in the second SS/PBCH block.