Method and apparatus for obtaining resource indication value
This application provides methods and apparatuses for determining a resource indication value. One method includes: a terminal device receives downlink control information, which includes a resource indication value (RIV) determined based on a first bandwidth part and indicates a data channel occupying contiguous virtual resource blocks in a second bandwidth part. The terminal device then determines, based on the RIV, the contiguous virtual resource blocks in the second bandwidth part, and sends or receives the data channel in the contiguous virtual resource blocks.
1. A method comprising:
receiving downlink control information including a resource indication value, wherein a quantity of bits of the resource indication value is determined based on a first bandwidth part, and wherein the downlink control information indicates a data channel occupying contiguous virtual resource blocks in a second bandwidth part;
determining, based on the resource indication value, the contiguous virtual resource blocks in the second bandwidth part; and
sending or receiving the data channel in the contiguous virtual resource blocks in the second bandwidth part, wherein
a number RB start of a starting virtual resource block of the contiguous virtual resource blocks in the second bandwidth part satifies RB start =└K·RB′ start ┘; and
a quantity L RBs of the contiguous virtual resource blocks in the second bandwidth part satisfies L RBs =└K·L′ RBs ┘, wherein
RB′ start represents a number of a starting virtual resource block of contiguous virtual resource blocks in the first bandwidth part, and L′ RBs represents a quantity of the contiguous virtual resource blocks in the first bandwidth part; and
K is a maximum value of at least one candidate value K′, wherein
the at least one candidate value K′ satisfies:
K′≤└N RB BWP2 /N RB BWP1 ┘, wherein
N RB BWP1 represents a bandwidth of the first bandwidth part, and N RB BWP2 represents a bandwidth of the second bandwidth part.
2. The method according to claim 1 , wherein the at least one candidate value K′ is comprised included in a candidate set, wherein the candidate set includes 1, 2, 4 and 8.
3. The method according to claim 1 , wherein K is one of 1, 2, 4 or 8.
4. The method according to claim 1 , wherein K is 1.
5. The method according to claim 1 , wherein the resource indication value represented by RIV satisfies:
RIV=NHd RB BWP1 (L′ RBs −1)+RB′ start in response to (L′ RBs −1)≤└N RB BWP1 /2┘, or
RIV=N RB BWP1 (N RB BWP1 −L′ RBs +1)+(N RB BWP1 −1−RB′ start ) in response to (L′ RBs −1)>└N RB BWP1 /2┘.
6. The method according to claim 1 , wherein the first bandwidth part is a bandwidth before a bandwidth switching, and the second bandwidth part is a bandwidth after the bandwidth switching.
7. The method according to claim 1 , wherein the first bandwidth part is an initial bandwidth, and the second bandwidth part is an active bandwidth.
8. An apparatus comprising:
at least one processor; and
a memory coupled to the at least one processor and storing programming instructions for execution by the at least one processor, the programming instructions instruct the at least one processor to:
receive downlink control information including a resource indication value, wherein a quantity of bits of the resource indication value is determined based on a first bandwidth part, and wherein the downlink control information indicates a data channel occupying contiguous virtual resource blocks in a second bandwidth part;
determine, based on the resource indication value, the contiguous virtual resource blocks in the second bandwidth part; and
send or receive the data channel in the contiguous virtual resource blocks in the second bandwidth part, wherein
a number RB start of a starting virtual resource block of the contiguous virtual resource blocks in the second bandwidth part satisfies RB start =└K·RB′′ start ┘; and
a quantity L RBs of the contiguous virtual resource blocks in the second bandwidth part satisfies L RBs =└K·L RBs , wherein
RB′ start represents a number of a starting virtual resource block of contiguous virtual resource blocks in the first bandwidth part, and L′ RBs , represents a quantity of the contiguous virtual resource blocks in the first bandwidth part; and
K is a maximum value of at least one candidate value K′, wherein
the at least one candidate value K′ satisfies:
K′≤└N RB BWP2 /N RB BWP1 ┘, wherein
N RB BWP1 represents a bandwidth of the first bandwidth part, and N RB BWP2 represents a bandwidth of the second bandwidth part.
9. The apparatus according to claim 8 , wherein the at least one candidate value K′ is included in a candidate set, wherein the candidate set includes 1, 2, 4 and 8.
10. The apparatus according to claim 8 , wherein K is one of 1, 2, 4 or 8.
11. The apparatus according to claim 8 , wherein K is 1.
12. The apparatus according to claim 8 , wherein the resource indication value represented by RIV satisfies:
RIV=N RB BWP1 (L′ RBs −1)+RB′ start in response to (L′ RBs −1)≤└N RB BWP1 /2┘, or
RIV=N RB BWP1 (N RB BWP1 −L′ RBs +1)+(N RB BWP1 −1−RB′ start ) in response to (L′ RBs −1)>└N RB BWP1 /2.
13. The apparatus according to claim 8 , wherein the first bandwidth part is a bandwidth before a bandwidth switching, and the second bandwidth part is a bandwidth after the bandwidth switching.
14. The apparatus according to claim 8 , wherein the first bandwidth part is an initial bandwidth, and the second bandwidth part is an active bandwidth.
15. A non-transitory computer-readable storage medium, comprising executable instructions, wherein the executable instructions, when executed by a computer, cause the computer to:
receive downlink control information including a resource indication value, wherein a quantity of bits of the resource indication value is determined based on a first bandwidth part, and wherein the downlink control information indicates a data channel occupying contiguous virtual resource blocks in a second bandwidth part;
determine, based on the resource indication value, the contiguous virtual resource blocks in the second bandwidth part; and
send or receive the data channel in the contiguous virtual resource blocks in the second bandwidth part, wherein
a number RB start of a starting virtual resource block of the contiguous virtual resource blocks in the second bandwidth part satisfies RB start =└K·RB′ start ┘; and
a quantity L RBs of the contiguous virtual resource blocks in the second bandwidth part satisfies L RBs =└K·L′ RBs ┘, wherein
RB′ represents a number of a starting virtual resource block of contiguous virtual resource blocks in the first bandwidth part, and L′ RBs represents a quantity of the contiguous virtual resource blocks in the first bandwidth part; and
K is a maximum value of at least one candidate value K′, wherein
the at least one candidate value K′ satisfies:
K′≤└N RB BWP2 /N RB BWP1 ┘, wherein
N RB BWP1 represents a bandwidth of the first bandwidth part, and N RB BWP2 represents a bandwidth of the second bandwidth part.
16. The storage medium according to claim 15 , wherein the at least one candidate value K′ is included in a candidate set, wherein the candidate set includes 1, 2, 4 and 8.
17. The storage medium according to claim 15 , wherein K is one of 1, 2, 4 or 8.
18. The storage medium according to claim 15 , wherein K is 1.
19. The storage medium according to claim 15 , wherein the resource indication value represented by RIV satisfies:
RIB=N RB BWP1 (L′ RBs −1)+RB′ start in response to (L′ RBs −1)≤└N RB BWP1 /2┘, or
RIV=N RB BWP1 (N RB BWP1 −L′ RBS +1)+(N RB BWP1 −1−RB′ start ) in response to (L′ RBs −1)>└N RB BWP1 /2┘.
20. The storage medium according to claim 15 , wherein the first bandwidth part is an initial bandwidth, and the second bandwidth part is an active bandwidth.