Method and device for transmitting and receiving wireless signal in wireless communication system
Disclosed are a method and device for transmitting and receiving a wireless signal in a wireless communication system. A method for transmitting a physical random access channel (PRACH) according to an embodiment disclosed herein comprises the steps of: receiving configuration information related to uplink transmission from a base station; and transmitting the PRSCH to the base station on the basis of the configuration information. The configuration information includes information about the subcarrier spacing (SCS) of the PRACH and information about the SCS of a physical uplink shared channel (PUSCH), and the number of resource blocks (RBs) occupied by the PUSCH can be determined, on the basis of i) the SCS of the PRACH, ii) the SCS of the PUSCH, and iii) the length of the PRACH sequence, as the minimum number of RBs to which a PRACH sequence can be mapped, wherein the number of RBs occupied by the PUSCH is expressed as the number of RBs for the PUSCH.
1 . A method comprising:
receiving, by a user equipment (UE), from a base station, configuration information related to uplink transmission; and
transmitting, by the UE, to the base station, a first uplink channel for random access based on the configuration information,
wherein the configuration information includes information on subcarrier spacing of the first uplink channel and information on subcarrier spacing of a second uplink channel for data transmission,
wherein based on i) the subcarrier spacing of the first uplink channel, ii) the subcarrier spacing of the second uplink channel and iii) a length of a sequence for random access, a number of resource blocks occupied by the first uplink channel, expressed as a number of resource blocks for the second uplink channel, is determined so that the sequence for random access is mapped to a minimum number of resource blocks and an offset for mapping the sequence for random access in the resource blocks occupied by the first uplink channel is greater than 1.
2 . The method of claim 1 , wherein based on i) the subcarrier spacing of the first uplink channel, ii) the subcarrier spacing of the second uplink channel and iii) the length of the sequence for random access, an offset for mapping the sequence for random access in the resource blocks occupied by the first uplink channel is determined so that the sequence for random access is located at a center of the resource blocks occupied by the first uplink channel.
3 . The method of claim 2 , wherein the offset for mapping the sequence for random access in the resource blocks occupied by the first uplink channel is determined by the following equation,
equation:
k
¯
=
⌊
(
(
1
2
N
R
B
R
A
-
1
)
×
Δ
f
-
(
L
R
A
-
1
)
×
Δ
f
R
A
)
2
Δ
f
R
A
⌋
wherein, in the equation, N RB RA is the number of resource blocks occupied by the first uplink channel, expressed as the number of resource blocks for the second uplink channel, L RA is the length of the sequence for random access, Δf RA is the subcarrier spacing of the first uplink channel, and Δf is the subcarrier spacing of the second uplink channel.
4 . The method of claim 1 , wherein the number of resource blocks occupied by the first uplink channel, expressed as the number of resource blocks for the second uplink channel, is determined by the minimum number of resource blocks to which the sequence for random access can be mapped +1.
5 . The method of claim 4 , wherein the number of resource blocks occupied by the first uplink channel, expressed as the number of resource blocks for the second uplink channel, is determined by the following equation,
equation:
N
R
B
R
A
=
⌈
(
(
L
R
A
+
1
)
×
Δ
f
R
A
)
1
2
×
Δ
f
⌉
+
1
wherein, in the equation, N RB RA is the number of resource blocks occupied by the first uplink channel, expressed as the number of resource blocks for the second uplink channel, L RA is the length of the sequence for random access, Δf RA is the subcarrier spacing of the first uplink channel, and Δf is the subcarrier spacing of the second uplink channel.
6 . The method of claim 1 , wherein based on the length of the sequence for random access being 139, the subcarrier spacing of the first uplink channel being 960 and the subcarrier spacing of the second uplink channel being 120, the number of resource blocks occupied by the first uplink channel, expressed as the number of resource blocks for the second uplink channel, is 95 and an offset for mapping the sequence for random access in the resource blocks occupied by the first uplink channel is 2.
7 . A user equipment (UE) comprising:
at least one transceiver for transmitting and receiving a wireless signal; and
at least one processor for controlling the at least one transceiver,
wherein the at least one processor configured to:
receive, from a base station, configuration information related to uplink transmission; and
transmit, to the base station, a first uplink channel for random access based on the configuration information,
wherein the configuration information includes information on subcarrier spacing of the first uplink channel and information on subcarrier spacing of a second uplink channel for data transmission,
wherein based on i) the subcarrier spacing of the first uplink channel, ii) the subcarrier spacing of the second uplink channel and iii) a length of a sequence for random access, a number of resource blocks occupied by the first uplink channel, expressed as a number of resource blocks for the second uplink channel, is determined so that the sequence for random access is mapped to a minimum number of resource blocks and an offset for mapping the sequence for random access in the resource blocks occupied by the first uplink channel is greater than 1.
8 . A base station comprising:
at least one transceiver for transmitting and receiving a wireless signal; and
at least one processor for controlling the at least one transceiver,
wherein the at least one processor configured to:
transmit, to a user equipment (UE), configuration information related to uplink transmission; and
receive, from the UE, a first uplink channel for random access based on the configuration information,
wherein the configuration information includes information on subcarrier spacing of the first uplink channel and information on subcarrier spacing of a second uplink channel for data transmission,
wherein based on i) the subcarrier spacing of the first uplink channel, ii) the subcarrier spacing of the second uplink channel and iii) a length of a sequence for random access, a number of resource blocks occupied by the first uplink channel, expressed as a number of resource blocks for the second uplink channel-PUSCH, is determined so that the sequence for random access is mapped to a minimum number of resource blocks and an offset for mapping the sequence for random access in the resource blocks occupied by the first uplink channel is greater than 1.