Method for receiving downlink signal in wireless communication system and terminal using the same
Provided are a method and an apparatus for receiving a downlink signal in a wireless communication system. The method includes receiving resource block assignment information including a bitmap and receiving the downlink signal through a resource block group (RBG) indicated by the bitmap in a bandwidth part. A total number of resource block groups (RBGs) in the bandwidth part is determined based on an index of a start resource block of the bandwidth part, a size of the bandwidth part, and a size of one resource block group.
1. A method of receiving, by a user equipment (UE), a downlink signal in a wireless communication system, the method comprising:
receiving resource block (RB) assignment information comprising a bitmap related to at least one resource block group (RBG) in a bandwidth part (BWP); and
receiving the downlink signal through the at least one RBG informed by the bitmap in the BWP,
wherein a total number of RBGs for the BWP is determined based on (i) an index of a starting RB of the BWP, (ii) a size of the BWP, and (iii) a size of one RBG, and
wherein based on the BWP being an i-th BWP, the total number of RBGs for the BWP is equal to ┌(N BWP,i size /P)┐ or ┌(N BWP,i size /P)+1┐ based on a relationship between the index of the starting RB of the BWP and the size of one RBG, where N BWP,i size denotes a size of the i-th BWP, and P denotes the size of one RBG.
2. The method of claim 1 , wherein based on the BWP being the i-th BWP, the total number (N RBG ) of RBGs for the BWP is equal to:
N
RBG
=
⌈
(
N
BWP
,
i
size
+
(
N
BWP
,
i
start
mod
P
)
)
/
P
⌉
wherein N start BWP,i denotes an index of a starting RB of the i-th BWP.
3. The method of claim 2 , wherein a number of bits of the bitmap is equal to the total number (N RBG ) of RBGs for the BWP.
4. The method of claim 1 , wherein the size of one RBG is determined according to the size of the BWP from among candidate values previously configured through a radio resource control (RRC) message.
5. The method of claim 1 , wherein each bit of the bitmap corresponds to a respective RBG among the RBGs of the BWP, and indicates whether the RBG is allocated to the UE.
6. The method of claim 1 , wherein the index of the starting RB of the BWP is configured based on a first common resource block (CRB).
7. A user equipment (UE) configured to receive a downlink signal in a wireless communication system, the UE comprising:
a 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 by the at least one processor, perform operations comprising:
receiving, through the transceiver, resource block (RB) assignment information comprising including a bitmap related to at least one resource block group (RBG) in a bandwidth part (BWP), and
receiving, through the transceiver, the downlink signal through the at least one RBG informed by the bitmap in the BWP,
wherein a total number of RBGs for the BWP is determined based on (i) an index of a starting RB of the BWP, (ii) a size of the BWP, and (iii) a size of one RBG, and
wherein based on the BWP being an i-th BWP, the total number of RBGs for the BWP is equal to ┌(N BWP,i size /P)┐ or ┌(N BWP,i size /P)+1┐ based on a relationship between the index of the starting RB of the BWP and the size of one RBG, where N BWP,i size denotes a size of the i-th BWP, and P denotes the size of one RBG.
8. The UE of claim 7 , wherein based on the BWP being the i-th BWP, the total number (N RBG ) of RBGs in the BWP is equal to:
N
RBG
=
⌈
(
N
BWP
,
i
size
+
(
N
BWP
,
i
start
mod
P
)
)
/
P
⌉
wherein N start BWP,i denotes an index of a starting RB of the i-th BWP.
9. The UE of claim 8 , wherein a number of bits of the bitmap is equal to the total number (N RBG ) of RBGs for the BWP.
10. The UE of claim 7 , wherein the size of one RBG is determined according to the size of the BWP from among candidate values previously configured through a radio resource control (RRC) message.
11. The UE of claim 7 , wherein each bit of the bitmap corresponds to a respective RBG among the RBGs of the BWP, and indicates whether the RBG is allocated to the UE.
12. The UE of claim 7 , wherein the index of the starting RB of the BWP is configured based on a first common resource block (CRB).
13. A method of transmitting, by a base station, a downlink signal in a wireless communication system, the method comprising:
transmitting resource block (RB) assignment information comprising a bitmap related to at least one resource block group (RBG) in a bandwidth part (BWP); and
transmitting the downlink signal through the at least one RBG informed by the bitmap in the BWP,
wherein a total number of RBGs for the BWP is determined based on (i) an index of a starting RB of the BWP, (ii) a size of the BWP, and (iii) a size of one RBG, and
wherein based on the BWP being an i-th BWP, the total number of RBGs for the BWP is equal to ┌(N BWP,i size P)┐ or ┌(N BWP,i size /P)+1┐ based on a relationship between the index of the starting RB of the BWP and the size of one RBG, where N BWP,i size denotes a size of the i-th BWP, and P denotes the size of one RBG.
14. The method of claim 13 , wherein based on the BWP being the i-th BWP, the total number (N RBG ) of RBGs for the BWP is equal to:
N
RBG
=
⌈
(
N
BWP
,
i
size
+
(
N
BWP
,
i
start
mod
P
)
)
/
P
⌉
wherein N BWP,i start denotes an index of the starting RB of the i-th BWP.
15. A base station (BS) configured to transmit a downlink signal in a wireless communication system, the BS comprising:
a 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, through the transceiver, resource block (RB) assignment information comprising a bitmap related to at least one resource block group (RBG) in a bandwidth part (BWP); and
transmitting, through the transceiver, the downlink signal through the at least one RBG informed by the bitmap in the BWP,
wherein a total number of RBGs for the BWP is determined based on (i) an index of a starting RB of the BWP, (ii) a size of the BWP, and (iii) a size of one RBG, and wherein based on the BWP being an i-th BWP, the total number of RBGs for the BWP is equal to ┌(N BWP,i size /P)┐ or ┌(N BWP,i size /P)+1┐ based on a relationship between the index of the starting RB of the BWP and the size of one RBG, where N BWP,i size denotes a size of the i-th BWP, and P denotes the size of one RBG.
16. The BS of claim 15 , wherein based on the BWP being the i-th BWP, the total number (N RBG ) of RBGs for the BWP is equal to:
N
RBG
=
⌈
(
N
BWP
,
i
size
+
(
N
BWP
,
i
start
mod
P
)
)
/
P
⌉
wherein N BWP,i start denotes an index of a starting RB of the i-th BWP.