Aggregated-MPDU, method for transmitting response frame thereto, and wireless communication terminal using same
The present invention relates to a method for transmitting an aggregate MPDU and a response frame thereto and a wireless communication terminal using the same, and more particularly, to a wireless communication method and a wireless communication terminal for setting various formats of the aggregate MPDU and the response frame thereto and performing an efficient data communication by using the same. To this end, provided are a wireless communication terminal including: a processor; and a communication unit, wherein the processor receives an aggregate MPDU (A-MPDU) consisting of one or more MAC protocol data units (MPDUs), determines a format of a response frame for the received A-MPDU, and transmits a response frame of the determined format, wherein the format of the response frame for the A-MPDU is determined based on at least one of the number of traffic IDs (TIDs) soliciting an immediate response in MPDU(s) successfully received in the A-MPDU and MPDU delimiter information of the A-MPDU and a wireless communication method using the same.
1. A wireless communication terminal, the terminal comprising:
a processor; and
a communication unit,
wherein the processor is configured to:
transmit, through the communication unit, an aggregate MPDU (A-MPDU) consisting of one or more MAC protocol data units (MPDUs),
wherein the A-MPDU includes at least one MPDU delimiter information and one or more traffic ID(TID) related to the one or more MPDUs,
wherein each of the at least one MPDU delimiter information include an end of frame (EOF) field and a length field, and
receive, through the communication unit, a response frame of a specific format in response to the A-MPDU,
wherein the specific format of the response frame is determined as one of an Ack frame, a compressed BlockAck frame, and a multi-STA BlockAck frame based on a number of at least one TID for successfully received MPDUs among the one or more TIDs and a combination of the EOF field and the length field, and
wherein the at least one TID solicits an immediate response to the successfully received MPDUs.
2. The wireless communication terminal of claim 1 ,
wherein the specific format is determined by further considering whether the first MPDU delimiter information in which a value of the EOF field is 1 and a value of the length field is non-zero or the second MPDU delimiter information in which a value of the EOF field is 0 and a value of the length field is non-zero is included.
3. The wireless communication terminal of claim 1 ,
wherein the specific format of the response frame is determined as a format for the Ack frame when the one or more MPDUs include only one MPDU soliciting an immediate response, and the only one MPDU soliciting the immediate response follows the MPDU delimiter information with a value of the EOF field equal to 1 and a value of the length field is non-zero.
4. The wireless communication terminal of claim 1 ,
wherein the specific format of the response frame is determined as a format for the compressed BlockAck frame when the at least one TID is the same, and the at least one TID soliciting the immediate response follows the MPDU delimiter information with a value of the EOF field equal to 0.
5. The wireless communication terminal of claim 1 ,
wherein the specific format of the response frame is determined as a format for the multi-STA BlockAck frame when the one or more MPDUs include at least one MPDU of the at least one TID.
6. The wireless communication terminal of claim 1 ,
wherein the response frame is carried in a high efficiency single-user PHY protocol data unit (HE SU PPDU) when an MPDU in which an acknowledgment policy is set to HE TB PPDU (HTP) Ack is not present in the A-MPDU.
7. The wireless communication terminal of claim 1 ,
wherein the response frame is carried in a high efficiency trigger-based PHY protocol data unit (HE TB PPDU) when the A-MPDU contains a trigger frame or the A-MPDU contains a QoS data frame or a QoS null frame with an uplink multi-user response scheduling (UMRS) control field.
8. The wireless communication terminal of claim 7 ,
wherein an MPDU soliciting the immediate response and contained in the A-MPDU includes at least one of a QoS data frame in which an acknowledgment policy is set to HTP Ack and a QoS Null frame in which an acknowledgment policy is set to HTP Ack.
9. A wireless communication method of a wireless communication terminal, the method comprising:
transmitting through the communication unit, an aggregate MPDU(A-MPDU) consisting of one or more MAC protocol data units (MPDUs),
wherein the A-MPDU includes at least one MPDU delimiter information and one or more traffic ID(TID) related to the one or more MPDUs, and
wherein each of the at least one MPDU delimiter information include an end of frame (EOF) field and a length field; and
receiving, through the communication unit, a response frame of a specific format in response to the A-MPDU,
wherein the specific format of the response frame is determined as one of an Ack frame, a compressed BlockAck frame, and a multi-STA BlockAck frame based on a number of at least one TID for successfully received MPDUs among the one or more TIDs and a combination of the EOF field and the length field, and
wherein the at least one TID solicits an immediate response to the successfully received MPDUs.
10. The wireless communication terminal of claim 9 ,
wherein the specific format is determined by further considering whether the first MPDU delimiter information in which a value of the EOF field is 1 and a value of the length field is non-zero or the second MPDU delimiter information in which a value of the EOF field is 0 and a value of the length field is non-zero is included.
11. The wireless communication terminal of claim 9 ,
wherein the specific format of the response frame is determined as a format for the Ack frame when the one or more MPDUs include only one MPDU soliciting an immediate response, and the only one MPDU soliciting the immediate response follows the MPDU delimiter information with a value of the EOF field equal to 1 and a value of the length field is non-zero.
12. The wireless communication terminal of claim 9 ,
wherein the specific format of the response frame is determined as a format for the compressed BlockAck frame when the at least one TID is the same, and the at least one TID soliciting the immediate response follows the MPDU delimiter information with a value of the EOF field equal to 0.
13. The wireless communication terminal of claim 9 ,
wherein the specific format of the response frame is determined as a format for the multi-STA BlockAck frame when the one or more MPDUs include at least one MPDU of the at least one TID.
14. The wireless communication terminal of claim 9 ,
wherein the response frame is carried in a high efficiency single-user PHY protocol data unit (HE SU PPDU) when an MPDU in which an acknowledgment policy is set to HE TB PPDU (HTP) Ack is not present in the A-MPDU.
15. The wireless communication terminal of claim 9 ,
wherein the response frame is carried in a high efficiency trigger-based PHY protocol data unit (HE TB PPDU) when the A-MPDU contains a trigger frame or the A-MPDU contains a QoS data frame or a QoS null frame with an uplink multi-user response scheduling (UMRS) control field.
16. The wireless communication terminal of claim 15 ,
wherein an MPDU soliciting the immediate response and contained in the A-MPDU includes at least one of a QoS data frame in which an acknowledgment policy is set to HTP Ack and a QoS Null frame in which an acknowledgment policy is set to HTP Ack.