Resource allocation indication method and apparatus
In a method, a PPDU is generated, where the PPDU includes resource allocation information, and the resource allocation information is related to a channel bitmap in a beacon frame; and the PPDU is sent. According to the resource allocation indication method and apparatus provided in the embodiments of this application, an unavailable channel is indicated through an indication of the PPDU, so that a receive end can be prevent from performing transmission on the unavailable channel.
1. A method, comprising:
generating a physical-layer protocol data unit (PPDU), wherein the PPDU comprises resource allocation information comprised in a signal field of the PPDU, and the resource allocation information indicates resource allocations based on a channel bitmap in a beacon frame, wherein at least one punctured channel is indicated by the channel bitmap in the beacon frame, and the resource allocation information comprises a preset value that indicates a null 242-tone resource unit (RU) corresponding to the at least one punctured channel, and wherein the channel bitmap comprises a first value indicating that transmission is able to be performed on a corresponding 20 MHz channel or a second value indicating that transmission is not able to be performed on a corresponding 20 MHz channel; and
sending the PPDU and the beacon frame.
2. The method according to claim 1 , wherein at least one other punctured channel indicated by the resource allocation information based on the channel bitmap in the beacon frame comprises:
a 484-tone RU that is on a signaling field-B (SIG-B) content channel and whose resource unit allocation subfield comprises zero user fields, or a 996-tone RU that is on the SIG-B content channel and whose resource unit allocation subfield comprises zero user fields.
3. The method according to claim 2 , wherein the channel bitmap is carried in an Extremely High Throughput (EHT) operation element of the beacon frame.
4. The method according to claim 1 , wherein the preset value is 01110001.
5. The method according to claim 1 , wherein user information corresponding to the resource allocation information of the at least one punctured channel indicated by the channel bitmap in the beacon frame does not exist in the PPDU.
6. The method according to claim 1 , wherein the channel bitmap indicates at least one other punctured channel, and the resource allocation information does not comprise any resource allocation information of the at least one other punctured channel indicated by the channel bitmap in the beacon frame.
7. The method according to claim 1 , wherein available channels indicated by the channel bitmap in the beacon frame are ranked, resource allocation information on a content channel 1 comprises resource allocation information of an odd-numbered channel after the ranking, and resource allocation information on a content channel 2 comprises resource allocation information of an even-numbered channel after the ranking.
8. A method, comprising:
receiving a physical-layer protocol data unit (PPDU), wherein the PPDU comprises resource allocation information comprised in a signal field of the PPDU, and the resource allocation information indicates resource allocations based on a channel bitmap in a beacon frame, wherein at least one punctured channel is indicated by the channel bitmap in the beacon frame, and the resource allocation information comprises a preset value that indicates a null 242-tone resource unit (RU) corresponding to the at least one punctured channel, and wherein the channel bitmap comprises a first value indicating that transmission is able to be performed on a corresponding 20 MHz channel or a second value indicating that transmission is not able to be performed on a corresponding 20 MHz channel; and
transmitting, based on the beacon frame and the PPDU, data on an RU indicated by the resource allocation information of the PPDU corresponding to user information of the PPDU.
9. The method according to claim 8 , wherein at least one other punctured channel indicated by the resource allocation information based on the channel bitmap in the beacon frame comprises:
a 484-tone RU that is on a signaling field-B (SIG-B) content channel and whose resource unit allocation subfield comprises zero user fields, or a 996-tone RU that is on the SIG-B content channel and whose resource unit allocation subfield comprises zero user fields.
10. The method according to claim 9 , wherein the channel bitmap is carried in an Extremely High Throughput (EHT) operation element of the beacon frame.
11. The method according to claim 8 , wherein the preset value is 01110001.
12. The method according to claim 8 , wherein user information corresponding to the resource allocation information of the at least one punctured channel indicated by the channel bitmap in the beacon frame does not exist in the PPDU.
13. The method according to claim 8 , wherein the channel bitmap indicates at least one other punctured channel, and the resource allocation information does not comprise any resource allocation information of the at least one other punctured channel indicated by the channel bitmap in the beacon frame.
14. The method according to claim 8 , wherein available channels indicated by the channel bitmap in the beacon frame are ranked, resource allocation information on a content channel 1 comprises resource allocation information of an odd-numbered channel after the ranking, and resource allocation information on a content channel 2 comprises resource allocation information of an even-numbered channel after the ranking.
15. An apparatus, comprising:
a processor; and
a transceiver that is in a communicative connection with the processor;
wherein the processor is configured to generate a physical-layer protocol data unit (PPDU), wherein the PPDU comprises resource allocation information comprised in a signal field of the PPDU, and the resource allocation information indicates resource allocations based on a channel bitmap in a beacon frame, wherein at least one punctured channel is indicated by the channel bitmap in the beacon frame, and the resource allocation information comprises a preset value that indicates a null 242-tone resource unit (RU) corresponding to the at least one punctured channel, and wherein the channel bitmap comprises a first value indicating that transmission is able to be performed on a corresponding 20 MHz channel or a second value indicating that transmission is not able to be performed on a corresponding 20 MHz channel; and
wherein the transceiver is configured to send the PPDU and the beacon frame.
16. The apparatus according to claim 15 , wherein at least one other punctured channel indicated by the resource allocation information based on the channel bitmap in the beacon frame comprises:
a 484-tone RU that is on a signaling field-B (SIG-B) content channel and whose resource unit allocation subfield comprises zero user fields, or a 996-tone RU that is on the SIG-B content channel and whose resource unit allocation subfield comprises zero user fields.
17. The apparatus according to claim 15 , wherein the preset value is 01110001.
18. The apparatus according to claim 15 , wherein user information corresponding to the resource allocation information of the at least one punctured channel indicated by the channel bitmap in the beacon frame does not exist in the PPDU.
19. The apparatus according to claim 15 , wherein the channel bitmap indicates at least one other punctured channel, and the resource allocation information does not comprise any resource allocation information of the at least one other punctured channel indicated by the channel bitmap in the beacon frame.
20. The apparatus according to claim 15 , wherein available channels indicated by the channel bitmap in the beacon frame are ranked, resource allocation information on a content channel 1 comprises resource allocation information of an odd-numbered channel after the ranking, and resource allocation information on a content channel 2 comprises resource allocation information of an even-numbered channel after the ranking.