Frequency domain resource allocation method and device
A frequency domain resource allocation method includes: receiving first downlink control information for scheduling a plurality of carriers, cells, or bandwidth parts; and obtaining frequency domain resources of a terminal on the plurality of carriers, cells, or bandwidth parts according to the first downlink control information, a quantity of bits required for frequency domain resource allocation of each scheduled carrier, cell, or bandwidth part, and a frequency domain resource group corresponding to each bit.
1 . A frequency domain resource allocation method, performed by a terminal and comprising:
receiving first downlink control information for scheduling a plurality of carriers, cells, or bandwidth parts; and
obtaining frequency domain resources of the terminal on the plurality of carriers, cells, or bandwidth parts according to the first downlink control information, a quantity of bits required for frequency domain resource allocation of each scheduled carrier, cell, or bandwidth part, and a frequency domain resource group corresponding to each bit;
wherein a size of a frequency domain resource allocation indication field of the first downlink control information is ΣNi, wherein Ni is a frequency domain resource allocation bitmap size determined based on a frequency domain resource group size of an i-th scheduled carrier, cell, or bandwidth part, and i is a natural number.
2 . The method according to claim 1 , wherein the method further comprises:
obtaining a frequency domain resource group size of each scheduled carrier, cell, or bandwidth part according to a frequency domain resource quantity of each scheduled carrier, cell, or bandwidth part;
performing scaling processing on the frequency domain resource group size of each scheduled carrier, cell, or bandwidth part; and
obtaining, according to a scaled frequency domain resource group size of each scheduled carrier, cell, or bandwidth part, the quantity of bits required for frequency domain resource allocation of each scheduled carrier, cell, or bandwidth part and/or the frequency domain resource group corresponding to each bit.
3 . The method according to claim 2 , wherein the performing scaling processing on the frequency domain resource group size of each scheduled carrier, cell, or bandwidth part comprises:
performing scaling processing on the frequency domain resource group size of each scheduled carrier, cell, or bandwidth part according to a scaling coefficient, wherein
the scaling coefficient is agreed in a protocol, or the scaling coefficient is configured by a network side, or the scaling coefficient is obtained according to a quantity of carriers, cells, or bandwidth parts scheduled by using the first downlink control information.
4 . The method according to claim 1 , wherein the frequency domain resources of the terminal on the plurality of carriers, cells, or bandwidth parts comprise any one of:
frequency domain resources jointly allocated for the terminal on the plurality of carriers;
frequency domain resources jointly allocated for the terminal on the plurality of cells;
frequency domain resources jointly allocated for the terminal on the plurality of bandwidth parts;
frequency domain resources allocated for the terminal on each of the plurality of carriers;
frequency domain resources allocated for the terminal on each of the plurality of cells; or
frequency domain resources allocated for the terminal on each of the plurality of bandwidth parts.
5 . The method according to claim 1 , wherein the method further comprises:
determining a frequency domain resource group size of the plurality of carriers, cells, or bandwidth parts; and
obtaining, according to the frequency domain resource group size, the quantity of bits required for frequency domain resource allocation of each scheduled carrier, cell, or bandwidth part and/or the frequency domain resource group corresponding to each bit.
6 . The method according to claim 5 , wherein the frequency domain resource group size of the plurality of carriers, cells, or bandwidth parts is configured by a network side.
7 . The method according to claim 5 , wherein the determining a frequency domain resource group size of the plurality of carriers, cells, or bandwidth parts comprises:
obtaining the frequency domain resource group size of the plurality of carriers, cells, or bandwidth parts according to a correspondence between a frequency domain resource quantity and a frequency domain resource group size and a first quantity, wherein
the first quantity comprises any one of:
a total frequency domain resource quantity of the plurality of carriers;
a total frequency domain resource quantity of the plurality of cells;
a total frequency domain resource quantity of the plurality of bandwidth parts;
a maximum frequency domain resource quantity or a minimum frequency domain resource quantity of at least a part of carriers in the plurality of carriers;
a maximum frequency domain resource quantity or a minimum frequency domain resource quantity of at least a part of cells in the plurality of cells; or
a maximum frequency domain resource quantity or a minimum frequency domain resource quantity of at least a part of bandwidth parts in the plurality of bandwidth parts.
8 . A frequency domain resource allocation method, performed by a terminal and comprising:
receiving second downlink control information for scheduling a plurality of carriers, cells, or bandwidth parts; and
obtaining frequency domain resources of the terminal on the plurality of carriers, cells, or bandwidth parts according to a frequency domain resource allocation field in the second downlink control information, wherein
the frequency domain resource allocation field comprises an index corresponding to a frequency domain resource allocation bitmap or an index corresponding to a frequency domain resource set, and the frequency domain resource set meets a preset condition;
wherein the method further comprises:
receiving a resource indication value list configured by a network device for each scheduled carrier, cell, or bandwidth part, wherein the index represents a location of the frequency domain resource allocation bitmap in the resource indication value list; or
receiving a resource indication value list jointly configured by a network device for the plurality of carriers, cells, or bandwidth parts, wherein the index represents a location of the frequency domain resource allocation bitmap in the jointly configured resource indication value list;
wherein the preset condition comprises one or more of:
a quantity of frequency domain resources in the frequency domain resource set being greater than or equal to a first preset value;
a ratio of the quantity of frequency domain resources in the frequency domain resource set to a quantity of allocable frequency domain resources on a carrier, cell, or bandwidth part being greater than or equal to a second preset value; or
frequency domain resources in the frequency domain resource set being discontinuous frequency domain resources.
9 . The method according to claim 8 , wherein when the resource indication value list is configured by the network device for each scheduled carrier, cell, or bandwidth part, a size of the frequency domain resource allocation field is related to a quantity of frequency domain resource allocation bitmaps in the resource indication value list configured for each scheduled carrier, cell, or bandwidth part.
10 . The method according to claim 8 , wherein when the resource indication value list is jointly configured by the network device for the plurality of carriers, cells, or bandwidth parts, a size of the frequency domain resource allocation field is related to a quantity of frequency domain resource allocation bitmaps in the jointly configured resource indication value list.
11 . The method according to claim 8 , wherein the frequency domain resource allocation bitmap indicates frequency domain resources allocated for the terminal on one scheduled carrier, cell, or bandwidth part, or indicates frequency domain resources jointly allocated for the terminal on the plurality of carriers, cells, or bandwidth parts.
12 . The method according to claim 8 , wherein a size of the frequency domain resource allocation field is related to a quantity of frequency domain resource sets.
13 . The method according to claim 8 , wherein the index corresponding to the frequency domain resource set indicates that the frequency domain resource set is arranged in ascending order or descending order according to a length of a corresponding bitmap.
14 . A network device, comprising a processor, a memory, and a program stored in the memory and executable on the processor, wherein the program, when executed by the processor, causes the network device to perform the following method:
sending first downlink control information for scheduling a plurality of carriers, cells, or bandwidth parts, wherein
the first downlink control information is used to instruct a terminal to obtain frequency domain resources of the terminal on the plurality of carriers, cells, or bandwidth parts according to the first downlink control information, a quantity of bits required for frequency domain resource allocation of each scheduled carrier, cell, or bandwidth part, and a frequency domain resource group corresponding to each bit; wherein
a size of a frequency domain resource allocation indication field of the first downlink control information is ΣNi, wherein Ni is a frequency domain resource allocation bitmap size determined based on a frequency domain resource group size of an i-th scheduled carrier, cell, or bandwidth part, and i is a natural number;
or
sending second downlink control information for scheduling a plurality of carriers, cells, or bandwidth parts, wherein
a frequency domain resource allocation field in the second downlink control information comprises an index corresponding to a frequency domain resource allocation bitmap or an index corresponding to a frequency domain resource set, and the frequency domain resource set meets a preset condition; wherein
the method further comprises:
sending a resource indication value list configured for each scheduled carrier, cell, or bandwidth part, wherein the index represents a location of the frequency domain resource allocation bitmap in the resource indication value list; or
sending a resource indication value list jointly configured for the plurality of carriers, cells, or bandwidth parts, wherein the index represents a location of the frequency domain resource allocation bitmap in the jointly configured resource indication value list;
wherein the preset condition comprises one or more of:
a quantity of frequency domain resources in the frequency domain resource set being greater than or equal to a first preset value;
a ratio of the quantity of frequency domain resources in the frequency domain resource set to a quantity of allocable frequency domain resources on a carrier, cell, or bandwidth part being greater than or equal to a second preset value; or
frequency domain resources in the frequency domain resource set being discontinuous frequency domain resources.
15 . The network device according to claim 14 , wherein when the resource indication value list is configured by the network device for each scheduled carrier, cell, or bandwidth part, a size of the frequency domain resource allocation field is related to a quantity of frequency domain resource allocation bitmaps in the resource indication value list configured for each scheduled carrier, cell, or bandwidth part.
16 . The network device according to claim 14 , wherein when the resource indication value list is jointly configured by the network device for the plurality of carriers, cells, or bandwidth parts, a size of the frequency domain resource allocation field is related to a quantity of frequency domain resource allocation bitmaps in the jointly configured resource indication value list.
17 . The network device according to claim 14 , wherein a size of the frequency domain resource allocation field is related to a quantity of frequency domain resource sets.
18 . The network device according to claim 14 , wherein the index corresponding to the frequency domain resource set indicates that the frequency domain resource set is arranged in ascending order or descending order according to a length of a corresponding bitmap.
19 . A communications device, comprising a processor, a memory, and a program stored in the memory and executable on the processor, wherein when the program is executed by the processor, steps of the frequency domain resource allocation method according to claim 1 are implemented.
20 . A non-transitory computer-readable storage medium, wherein the non-transitory computer-readable storage medium stores a program, and when the program is executed by a processor, steps of the frequency domain resource allocation method according to claim 1 are implemented.