Method for determining data buffer status, and apparatus
Embodiments of this application disclose a method for determining a data buffer status, and an apparatus. The method includes: A first MLD receives first indication information from a second MLD, and determines, based on the first indication information and a correspondence between an association identifier of the first MLD and a data type supported by the first MLD, a buffer status of bufferable data that corresponds to the at least one data type and that is in the second MLD, where the first indication information is used to indicate the buffer status of the bufferable data. According to the embodiments of this application, a data buffer status in a data type dimension can be determined. The embodiments of this application may be applied to a wireless local area network system that supports a next-generation Wi-Fi EHT protocol of the IEEE 802.11, that is, the 802.11 protocol such as 802.11be.
1. A method for determining a data buffer status, wherein the method comprises:
determining, by a second multi-link device (MLD), whether the second MLD will have more bufferable data, corresponding to any second data type mapped to a first link between the second MLD and a first MLD, buffered in the second MLD after sending first bufferable data; and
sending, by the second MLD, first bufferable data to the first MLD over the first link, wherein the first bufferable data comprises a first field, and the first field indicates whether more bufferable data corresponding to the any second data type is buffered in the second MLD, wherein the first field is only one bit.
2. The method according to claim 1 , wherein the first bufferable data further comprises an indication that indicates whether more bufferable data corresponding to a management frame is buffered in the second MLD.
3. The method according to claim 1 , wherein the first field is a more data (More Data) subfield; and
a value of the More Data subfield is 1, indicating that more bufferable data corresponding to the any second data type is buffered in the second MLD; or
a value of the More Data subfield is 0, indicating that more bufferable data corresponding to any one of the any second data type is not buffered in the second MLD.
4. The method according to claim 1 , wherein the method further comprises:
sending, by the second MLD, bufferable data to the first MLD after receiving a PS-Poll frame from the first MLD.
5. The method according to claim 1 , wherein the method further comprises:
sending a fourth indication information to the first MLD, wherein the fourth indication information indicates that no bufferable data corresponding to any one of the any second data type is buffered in the second MLD.
6. The method according to claim 5 , wherein the fourth indication information is a quality of service null value (QOS Null) frame, where the QoS null frame is a data frame that does not carry a payload, and a value of the More Data subfield in the QoS null frame is 0.
7. A chip system, comprising at least one memory, at least one processor, and an interface, wherein
the processor is configured to determine whether the second MLD will have more bufferable data, corresponding to any second data type mapped to a first link between the second MLD and a first MLD, buffered in the memory after sending first bufferable data; and
the interface is configured to send first bufferable data to the first MLD over the first link, wherein the first bufferable data comprises a first field, and the first field indicates whether more bufferable data corresponding to the any second data type is buffered in the memory, wherein the first field is only one bit.
8. The communications apparatus according to claim 7 , wherein the first bufferable data further comprises an indication that indicates whether more bufferable data corresponding to a management frame is buffered in the second MLD.
9. The communications apparatus according to claim 7 , wherein the first field is a more data (More Data) subfield; and
a value of the More Data subfield is 1, indicating that more bufferable data corresponding to the any second data type is buffered in the second MLD; or
the value of the More Data subfield is 0, indicating that more bufferable data corresponding to any one of the any second data type is not buffered in the second MLD.
10. The communications apparatus according to claim 7 , wherein the interface is further configured to receive a PS-Poll frame from the first MLD.
11. The communications apparatus according to claim 10 , wherein the interface is further configured to send the bufferable data to the first MLD after receiving the PS-Poll frame from the first MLD.
12. The communications apparatus according to claim 7 , wherein the interface is further configured to send a fourth indication information to the first MLD, wherein the fourth indication information indicates that no bufferable data corresponding to any one of the any second data type is buffered in the second MLD.
13. A communications apparatus, wherein the apparatus comprises a transceiver, a processor, and a memory, wherein
the processor is configured to determine whether the second MLD will have more bufferable data, corresponding to any second data type mapped to a first link between the second MLD and a first MLD, buffered in the memory after sending first bufferable data; and
the transceiver is configured to send bufferable data to a first MLD over the first link, wherein the first bufferable data comprises a first field, and the first field indicates whether more bufferable data corresponding to the any second data type is buffered in the memory, wherein the first field is only one bit.
14. The communications apparatus according to claim 13 , wherein the first bufferable data further comprises an indication that indicates whether more bufferable data corresponding to a management frame is buffered in the second MLD.
15. The communications apparatus according to claim 13 , wherein the first field is a more data (More Data) subfield; and
a value of the More Data subfield is 1, indicating that more bufferable data corresponding to the any second data type is buffered in the second MLD; or
the value of the More Data subfield is 0, indicating that more bufferable data corresponding to any one of the any second data type is not buffered in the second MLD.
16. The communications apparatus according to claim 13 , wherein the transceiver is further configured to receive a PS-Poll frame from the first MLD.
17. The communications apparatus according to claim 16 , wherein the transceiver is further configured to send the bufferable data to the first MLD after receiving the PS-Poll frame from the first MLD.
18. The communications apparatus according to claim 13 , wherein the transceiver is further configured to send a fourth indication information to the first MLD, wherein the fourth indication information indicates that no bufferable data corresponding to any one of the any second data type is buffered in the second MLD.