Resource mapping method and device
This application provides a resource mapping method and a device. A network device writes n physical resource block groups into an interleaving matrix row by row, where N null values are inserted into intersections between the first row and the last N columns of the interleaving matrix or intersections between the last row and the first N columns of the interleaving matrix, n is a positive integer, and N is a natural number; reads the n physical resource block groups from the interleaving matrix column by column, where the n read physical resource block groups are mapped to n virtual resource block groups; and determines, based on the n physical resource block groups mapped to the n virtual resource block groups, physical resource blocks mapped to virtual resource blocks in the n virtual resource block groups.
1. A method, comprising:
writing, by a device, n virtual resource block groups into an interleaving matrix data structure, wherein the n virtual resource block groups do not comprise a last virtual resource block group in a carrier bandwidth part; and
reading, by the device, the n virtual resource block groups from the interleaving matrix data structure, wherein the n virtual resource block groups are mapped to n physical resource block groups, wherein the last virtual resource block group in the carrier bandwidth part corresponds to a last physical resource block group in the carrier bandwidth part;
where N null values are inserted into intersections between a first row and a last N columns of the interleaving matrix data structure, wherein n is a positive integer, and wherein N is a natural number.
2. The method according to claim 1 , wherein:
a quantity of physical resource blocks comprised in a first physical resource block group in the carrier bandwidth part is L−N BWP start mod L, a second physical resource block group to a penultimate physical resource block group in the carrier bandwidth part each comprises L physical resource blocks, and a quantity of physical resource blocks comprised in the last physical resource block group is (N BWP start +N BWP size )mod L; and
the carrier bandwidth part comprises ┌N BWP size /L┐ or ┌N BWP size /L┐+1 physical resource block groups, the carrier bandwidth part comprises N BWP size physical resource blocks, and the carrier bandwidth part corresponds to N BWP size virtual resource blocks, N BWP start represents a location of a start physical resource block in the carrier bandwidth part, and in common resource blocks, and mod represents a modulo operation.
3. The method according to claim 2 , further comprising:
grouping the N BWP size physical resource blocks into the physical resource block groups; and
numbering the physical resource block groups in an order of indexes of the common resource blocks.
4. The method according to claim 1 , wherein
a quantity of virtual resource blocks comprised in a first virtual resource block group in the carrier bandwidth part is L−N BWP start mod L, a second virtual resource block group to a penultimate virtual resource block group in the carrier bandwidth part each comprises L virtual resource blocks, and a quantity of virtual resource blocks comprised in the last virtual resource block group is (N BWP start +N BWP size )mod L; and
the carrier bandwidth part comprises ┌N BWP size /L┐ or ┌N BWP size /L┐+1 virtual resource block groups, the carrier bandwidth part comprises N BWP size physical resource blocks, and corresponds to virtual resource blocks, N BWP start represents a location of the start physical resource block in the carrier bandwidth part and in common resource blocks, and mod represents a modulo operation.
5. The method according to claim 4 , further comprising:
grouping the N BWP size virtual resource blocks into the virtual resource block groups; and
numbering the virtual resource block groups in an order of the indexes of the common resource blocks.
6. The method according to claim 1 , wherein
a first physical resource block group to a penultimate physical resource block group in the carrier bandwidth part each comprises L physical resource blocks, a quantity of physical resource blocks in the last physical resource block group in the carrier bandwidth part is N BWP size −L·└N BWP size /L┘, and └ ┘ means rounding down; and
the carrier bandwidth part comprises ┌N BWP size /L┐ physical resource block groups, ┌ ┐ means rounding up, the carrier bandwidth part comprises N BWP size physical resource blocks, and the carrier bandwidth part corresponds to N BWP size virtual resource blocks.
7. The method according to claim 6 , further comprising:
grouping the N BWP size physical resource blocks into the ┌N BWP size /L┐ physical resource block groups; and
numbering the physical resource block groups in an order of indexes of the N BWP size physical resource blocks.
8. The method according to claim 1 , wherein:
a first virtual resource block group to a penultimate virtual resource block group in the carrier bandwidth part each comprises L virtual resource blocks, and a quantity of virtual resource blocks in the last virtual resource block group in the carrier bandwidth part is N BWP size −L·└N BWP size /L┘; and
the carrier bandwidth part corresponds to ┌N BWP size /L┐ virtual resource block groups, the carrier bandwidth part comprises N BWP size physical resource blocks, and the carrier bandwidth part corresponds to N BWP size virtual resource blocks.
9. The method according to claim 8 , further comprising:
grouping the virtual resource blocks into the virtual resource block groups; and
numbering the virtual resource block groups in an order of indexes of the virtual resource blocks.
10. An apparatus, comprising:
a non-transitory memory storage comprising instructions; and
one or more processors in communication with the non-transitory memory storage, wherein the one or more processors execute the instructions to:
write n virtual resource block groups into an interleaving matrix data structure, wherein the n virtual resource block groups do not comprise a last virtual resource block group in a carrier bandwidth part; and
read the n virtual resource block groups from the interleaving matrix data structure, wherein the n virtual resource block groups are mapped to n physical resource block groups, wherein the last virtual resource block group in the carrier bandwidth part corresponds to a last physical resource block group in the carrier bandwidth part;
where N null values are inserted into intersections between a first row and a last N columns of the interleaving matrix data structure, wherein n is a positive integer, and wherein N is a natural number.
11. The apparatus according to claim 10 , wherein:
a quantity of physical resource blocks comprised in a first physical resource block group in the carrier bandwidth part is L−N BWP start mod L, a second physical resource block group to a penultimate physical resource block group in the carrier bandwidth part each comprises L physical resource blocks, and a quantity of physical resource blocks comprised in the last physical resource block group is (N BWP start +N BWP size )mod L; and
the carrier bandwidth part comprises ┌N BWP size /L┐ or ┌N BWP size /L┐+1 physical resource block groups, the carrier bandwidth part comprises N BWP size physical resource blocks, and the carrier bandwidth part corresponds to N BWP size virtual resource blocks, N BWP start represents a location of a start physical resource block in the carrier bandwidth part and in common resource blocks, and mod represents a modulo operation.
12. The apparatus according to claim 11 , wherein the instructions comprise further instructions to:
group the N BWP size physical resource blocks into the physical resource block groups; and
number the physical resource block groups in an order of indexes of the common resource blocks.
13. The apparatus according to claim 10 , wherein:
a quantity of virtual resource blocks comprised in a first virtual resource block group in the carrier bandwidth part is L−N BWP start mod L, a second physical resource block group to a penultimate physical resource block group in the carrier bandwidth part each comprises L virtual resource blocks, and a quantity of virtual resource blocks comprised in the last virtual resource block group is (N BWP start +N BWP size )mod L; and
the carrier bandwidth part comprises ┌N BWP size /L┐ or ┌N BWP size /L┐+1 virtual resource block groups, the carrier bandwidth part comprises N BWP size physical resource blocks, and the carrier bandwidth part corresponds to N BWP size virtual resource blocks, N BWP start represents a location of the start physical resource block in the carrier bandwidth part and in common resource blocks, and mod represents a modulo operation.
14. The apparatus according to claim 13 , wherein the instructions include further instructions to:
group the N BWP size virtual resource blocks into the virtual resource block groups; and
number the virtual resource block groups in an order of the indexes of the common resource blocks.
15. The apparatus according to claim 10 , wherein a first physical resource block group to a penultimate physical resource block group in the carrier bandwidth part each comprises L physical resource blocks, a quantity of physical resource blocks in the last physical resource block group is N BWP size −L·└N BWP size /L┘, and └ ┘ means rounding down; and
the carrier bandwidth part comprises ┌N BWP size /L┐ physical resource block groups, ┌ ┐ means rounding up, the carrier bandwidth part comprises N BWP size physical resource blocks, and the carrier bandwidth part corresponds to N BWP size virtual resource blocks.
16. The apparatus according to claim 10 , wherein the instructions comprise further instructions to:
group N BWP size physical resource blocks into the physical resource block groups; and
number the physical resource block groups in an order of indexes of the N BWP size physical resource blocks.
17. The apparatus according to claim 10 , wherein:
a first virtual resource block group to a penultimate virtual resource block group in the carrier bandwidth part each comprises L virtual resource blocks, and a quantity of virtual resource blocks in the last virtual resource block group is N BWP size −L·└N BWP size /L┘; and
the carrier bandwidth part corresponds to ┌N BWP size /L┐ virtual resource block groups, the carrier bandwidth part comprises N BWP size physical resource blocks, and the carrier bandwidth part corresponds to N BWP size virtual resource blocks.
18. The apparatus according to claim 17 , wherein the instructions comprise further instructions to:
group the N BWP size virtual resource blocks; and
number the virtual resource block groups in an order of indexes of the N BWP size virtual resource blocks.