Receiving state indication method for A-MPDU and receive end device
A receiving state indication method for an aggregate-media access control (MAC) protocol data unit (A-MPDU) and a receiving device in order to indicate a receiving state of the A-MPDU including a MAC service data unit (MSDU) fragment, where the method includes receiving, by a receive end, the A-MPDU from a transmit end, and sending, by the receive end to the transmit end, an acknowledgement frame indicating a receiving state of the A-MPDU when at least one MPDU in the A-MPDU is obtained by encapsulating the fragment of the MSDU, where the acknowledgement frame includes a fragment indication field and a receiving state field.
1. A receiving state indication method for an aggregate-media access control (MAC) protocol data unit (A-MPDU), the method comprising:
receiving, by a receive end, the A-MPDU from a transmit end, wherein the A-MPDU comprises at least one MPDU, wherein the at least one MPDU includes a first MPDU or a second MPDU, wherein the first MPDU is obtained by encapsulating one MAC service data unit (MSDU), wherein the second MPDU is obtained by encapsulating one MSDU fragment that is a segment of an MSDU, wherein the at least one MPDU comprises a sequence number (SN) and a fragment number (FN), wherein the SN identifies one of a sequence number of an MSDU in the first MPDU or a sequence number of an MSDU having one MSDU fragment that is encapsulated into the second MPDU, wherein the FN identifies a number of an MSDU fragment; and
sending, by the receive end to the transmit end, an acknowledgement frame indicating a receiving state of the A-MPDU when a FN field of the at least one MPDU is not 0, wherein the acknowledgement frame comprises a fragment indication field and a receiving state field, wherein the fragment indication field indicates that the A-MPDU comprises at least one second MPDU, wherein the receiving state field indicates a receiving state of each MPDU in the A-MPDU in a sequence of SNs, wherein all bits of a fixed quantity of bits in the receiving state field correspond to one SN, and wherein one bit in the fixed quantity of bits indicates a receiving state of one MPDU in the A-MPDU.
2. The method according to claim 1 , wherein when the acknowledgement frame comprises a frame format of a multi-user block acknowledgement (M-BA) frame, the fragment indication field comprises one or more bits of four reserved bits in a starting sequence control field in a block acknowledgement (BA) information field in the M-BA frame, and when the acknowledgement frame comprises a frame format of a compressed block acknowledgement (BA) frame, the fragment indication field comprises one or more bits of four reserved bits in a starting sequence control field in a BA information field in the compressed BA frame.
3. The method according to claim 1 , wherein a quantity of the fixed quantity of bits is greater than or equal to a maximum value of an allowed quantity of MSDU fragments of one MSDU.
4. The method according to claim 1 , wherein one bit of the fixed quantity of bits indicates a receiving state of one MPDU in a sequence of FNs.
5. The method according to claim 1 , wherein the fixed quantity of bits is 4 bits.
6. The method according to claim 1 , wherein when the acknowledgement frame comprises a frame format of a compressed block acknowledgement (BA) frame, the receiving state field comprises a BA bitmap field in the compressed BA frame, and
wherein when the acknowledgement frame comprises a frame format of a multi-user block acknowledgement (M-BA) frame, the receiving state field comprises a BA bitmap field in the M-BA frame.
7. A receiving state indication method for an aggregate-media access controller (MAC) protocol data unit (A-MPDU), the method comprising:
allocating, by a transmit end, a sequence number (SN) to each MAC protocol data unit (MPDU) in the A-MPDU, wherein the A-MPDU comprises at least one MPDU, wherein the at least one MPDU includes a first MPDU or a second MPDU, wherein the first MPDU is obtained by encapsulating one MAC service data unit (MSDU), and wherein the second MPDU is obtained by encapsulating one MSDU fragment that is a segment of an MSDU;
sending, by the transmit end, the A-MPDU to a receive end, wherein the at least one MPDU comprises an SN that identifies a sequence number of an MSDU in the first MPDU or a sequence number of an MSDU having one MSDU fragment that is encapsulated into the second MPDU; and
receiving, by the transmit end, an acknowledgement frame from the receive end, wherein the acknowledgement frame comprises an indication field indicating a receiving state of each MPDU in the A-MPDU in a sequence of SNs, wherein all bits of a fixed quantity of bits in the indication field correspond to one SN, and wherein one bit of the fixed quantity of bits in the indication field indicates a receiving state of one MPDU in the A-MPDU.
8. The method according to claim 7 , wherein the SN is carried in a MAC header of each MPDU.
9. The method according to claim 7 , wherein when the acknowledgement frame comprises a frame format of a compressed block acknowledgement (BA) frame, the indication field comprises a BA bitmap field in the compressed BA frame, and wherein when the acknowledgement frame comprises a frame format of a multi-user block acknowledgement (M-BA) frame, the indication field comprises a BA bitmap field in the M-BA frame.
10. The method according to claim 7 , wherein the acknowledgement frame further comprises a fragment indication field indicating that at least one MPDU in the A-MPDU is the second MPDU.
11. The method according to claim 10 , wherein when the acknowledgement frame comprises a frame format of a multi-user block acknowledgement (M-BA) frame, the fragment indication field comprises one or more bits of four reserved bits in a starting sequence control field in a block acknowledgement (BA) information field in the M-BA frame, and
wherein when the acknowledgement frame comprises a frame format of a compressed block acknowledgement (BA) frame, the fragment indication field comprises one or more bits of four reserved bits in a starting sequence control field in a BA information field in the compressed BA frame.
12. The method according to claim 7 , wherein the fixed quantity of bits is 4 bits.
13. The method according to claim 7 , wherein the at least one MPDU further comprises a fragment number (FN) that identifies a number of an MSDU fragment, and wherein one bit of the fixed quantity of bits indicates a receiving state of one MPDU in a sequence of FNs.
14. A receive end, comprising:
a processor; and
a memory storing instructions executable by the processor such that when executed, cause the receive end to:
receive an aggregate-media access control (MAC) protocol data unit (A-MPDU) from a transmit end, wherein the A-MPDU comprises at least one MPDU, wherein the at least one MPDU includes a first MPDU or a second MPDU, wherein the first MPDU is obtained by encapsulating one MAC service data unit (MSDU), wherein the second MPDU is obtained by encapsulating one MSDU fragment that is a segment of an MSDU, wherein the at least one MPDU comprises a sequence number (SN) and a fragment number (FN), wherein the SN identifies a sequence number of an MSDU in the first MPDU or a sequence number of an MSDU having one MSDU fragment that is encapsulated into the second MPDU, wherein the FN identifies a number of an MSDU fragment; and
send an acknowledgement frame indicating a receiving state of the A-MPDU when a FN field of the at least one MPDU is not 0, wherein the acknowledgement frame comprises a fragment indication field and a receiving state field, wherein the fragment indication field indicates that the A-MPDU comprises at least one second MPDU, wherein the receiving state field indicates a receiving state of each MPDU in the A-MPDU in the sequence of SNs, wherein all bits of a specified fixed quantity of bits in the receiving state field correspond to one SN, and wherein one bit of the fixed quantity of bits in the receiving state filed indicates a receiving state of one MPDU in the A-MPDU.
15. The receive end according to claim 14 , wherein one bit of the fixed quantity of bits indicates a receiving state of one MPDU in a sequence of FNs.
16. The receive end according to claim 14 , wherein the fixed quantity of bits is 4 bits.
17. The receive end according to claim 14 , wherein a quantity of the fixed quantity of bits is greater than or equal to a maximum value of an allowed quantity of MSDU fragments of one MSDU.
18. The receive end according to claim 14 , wherein when the acknowledgement frame comprises a frame format of a multi-user block acknowledgement (M-BA) frame, the fragment indication field comprises one or more bits of four reserved bits in a starting sequence control field in a block acknowledgement (BA) information field in the M-BA frame, and
wherein when the acknowledgement frame comprises a frame format of a compressed block acknowledgement (BA) frame, the fragment indication field comprises one or more bits of four reserved bits in a starting sequence control field in a BA information field in the compressed BA frame.
19. The receive end according to claim 14 , wherein when the acknowledgement frame comprises a frame format of a compressed block acknowledgement (BA) frame, the receiving state field comprises a BA bitmap field in the compressed BA frame, and
wherein when the acknowledgement frame comprises a frame format of a multi-user block acknowledgement (M-BA) frame, the receiving state field comprises a BA bitmap field in the M-BA frame.
20. A transmit end comprising a processor and a memory storing instructions executable by the processor such when executed, cause the transmit end to implement a method comprising:
allocating a sequence number (SN) to each media access control (MAC) protocol data unit (MPDU) in an aggregate-MPDU (A-MPDU), wherein the A-MPDU comprises at least one MPDU, wherein the at least one MPDU includes a first MPDU or a second MPDU, wherein the first MPDU is obtained by encapsulating one MAC service data unit (MSDU), and wherein the second MPDU is obtained by encapsulating one MSDU fragment that is a segment of an MSDU;
sending the A-MPDU to a receive end, wherein the at least one MPDU comprises an SN that identifies a sequence number of an MSDU in the first MPDU or a sequence number of an MSDU having one MSDU fragment that is encapsulated into the second MPDU; and
receiving an acknowledgement frame from the receive end, wherein the acknowledgement frame comprises an indication field indicating a receiving state of each MPDU in the A-MPDU in a sequence of SNs, wherein all bits of a fixed quantity of bits in the indication field correspond to one SN, and wherein one bit of the fixed quantity of bits in the indication field indicates a receiving state of one MPDU in the A-MPDU.
21. The transmit end according to claim 20 , wherein the acknowledgement frame further comprises a fragment indication field indicating that at least one MPDU in the A-MPDU is the second MPDU.
22. The transmit end according to claim 20 , wherein the at least one MPDU further comprises a fragment number (FN) that identifies a number of an MSDU fragment, and wherein one bit of the fixed quantity of bits indicates a receiving state of one MPDU in a sequence of FNs.
23. The transmit end according to claim 20 , wherein the SN is carried in a MAC header of each MPDU.
24. The transmit end according to claim 20 , wherein the fixed quantity of bits is 4 bits.
25. The transmit end according to claim 20 , wherein when the acknowledgement frame comprises a frame format of a multi-user block acknowledgement (M-BA) frame, the indication field comprises a BA bitmap field in the M-BA frame, and
wherein when the acknowledgement frame comprises a frame format of a compressed block acknowledgement (BA) frame, the indication field comprises a BA bitmap field in the compressed BA frame.
26. The transmit end according to claim 21 , wherein when the acknowledgement frame comprises a frame format of a multi-user block acknowledgement (M-BA) frame, the fragment indication field comprises one or more bits of four reserved bits in a starting sequence control field in a block acknowledgement (BA) information field in the M-BA frame, and
wherein when the acknowledgement frame comprises a frame format of a compressed block acknowledgement (BA) frame, the fragment indication field comprises one or more bits of four reserved bits in a starting sequence control field in a BA information field in the compressed BA frame.