Method for transmitting and receiving physical random access channel and apparatus therefor
Disclosed herein is a method for transmitting a physical random access channel (PRACH) by a user equipment in a wireless communication system. In particular, the method includes receiving information about PRACH resource allocation, and transmitting, based on the information, the PRACH on any one of one or more PRACH occasions allocated in a PRACH slot, wherein a number of the one or more PRACH occasions is based on a preamble format and a starting Orthogonal Frequency Division Multiplexing (OFDM) symbol for the PRACH.
1. A method for transmitting a physical random access channel (PRACH) by a user equipment (UE) in a wireless communication system, the method comprising:
receiving information related to PRACH resource allocation; and
transmitting, based on the information, the PRACH on any one of one or more PRACH occasions allocated in a PRACH slot,
wherein a number of the one or more PRACH occasions is based on a preamble format for the PRACH and a starting Orthogonal Frequency Division Multiplexing (OFDM) symbol for the PRACH, and
wherein the one or more PRACH occasions are allocated only to a second half of the PRACH slot.
2. The method according to claim 1 , wherein the preamble format and the starting OFDM symbol are obtained via the information.
3. The method according to claim 1 , wherein the one or more PRACH occasions are consecutively allocated in the PRACH slot from the starting OFDM symbol.
4. The method according to claim 1 , wherein, when the preamble format has a duration of four OFDM symbols, an index of the starting OFDM symbol is 9.
5. A apparatus for transmitting a physical random access channel (PRACH) 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 by the at least one processor, perform operations comprising:
receiving information related to PRACH resource allocation; and
transmitting, based on the information, the PRACH on any one of one or more PRACH occasions allocated in a PRACH slot,
wherein a number of the one or more PRACH occasions is based on a preamble format for the PRACH and a starting Orthogonal Frequency Division Multiplexing (OFDM) symbol for the PRACH, and
wherein the one or more PRACH occasions are allocated only to a second half of the PRACH slot.
6. The apparatus according to claim 5 , wherein the preamble format and the starting OFDM symbol are obtained via the information.
7. The apparatus according to claim 5 , wherein the one or more PRACH occasions are consecutively allocated in the PRACH slot from the starting OFDM symbol.
8. The apparatus according to claim 5 , wherein, when the preamble format has a duration of four OFDM symbols, an index of the starting OFDM symbol is 9.
9. A method for receiving a physical random access channel (PRACH) by a base station (BS) in a wireless communication system, the method comprising:
transmitting information related to PRACH resource allocation; and
receiving, based on the information, the PRACH on any one of one or more PRACH occasions allocated in a PRACH slot,
wherein a number of the one or more PRACH occasions is based on a preamble format for the PRACH and a starting Orthogonal Frequency Division Multiplexing (OFDM) symbol for the PRACH, and
wherein the one or more PRACH occasions are allocated only to a second half of the PRACH slot.