Wireless communication method using trigger information, and wireless communication terminal using same
Provided is a wireless communication terminal that communicates wirelessly. The wireless communication terminal includes: a transceiver; and a processor. The processor receiving trigger information from a base wireless communication terminal using the transceiver, and transmits an Aggregate-MAC Protocol Data Unit (A-MPDU) to the base wireless communication terminal based on the trigger information.
1. A wireless communication terminal communicating wirelessly, the terminal comprising:
a transceiver; and
a processor,
wherein the processor is configured to:
receive trigger information from a base wireless communication terminal using the transceiver, wherein the trigger information triggers a transmission of a trigger-based physical layer protocol data unit (PPDU) by the wireless communication terminal, wherein when the trigger information is included in a trigger frame, the trigger frame comprises a signaling field, wherein the signaling field indicates whether aggregating one or more MAC Protocol Data Unit (MPDU)s requesting an immediate response to generate an Aggregate-MAC Protocol Data Unit (A-MPDU) is allowed and indicates a maximum number of TIDs that is allowed to be aggregated in the A-MPDU when the wireless terminal generates the A-MPDU,
when the value of the signaling field is a predetermined value, generate the A-MPDU not to include one or more MPDUs requesting an immediate response,
when the value of the signaling field is within a predetermined range, generate the A-MPDU according to the maximum number of TIDs, and
transmit the trigger-based PPDU including the A-MPDU to the base wireless communication terminal.
2. The wireless communication terminal of claim 1 , wherein the wireless communication is allowed to aggregate one or more MPDUs not requesting an immediate response regardless of the maximum number of TIDs.
3. The wireless communication terminal of claim 2 , wherein the one or more MPDUs not requesting an immediate response comprises a Quality of Service (QoS) Null frame not requesting an ACK for the QoS Null frame.
4. The wireless communication terminal of claim 2 , wherein the one or more MPDUs not requesting an immediate response comprises an Action No Ack frame not requesting an ACK for the Action No Ack frame.
5. The wireless communication terminal of claim 1 , wherein when the value of the signaling field is within a predetermined range, the processor is configured to aggregate one or more action frames regardless of a maximum number of TIDs that is allowed to be aggregated in the A-MPDU when the wireless terminal generates the A-MPDU.
6. The wireless communication terminal of claim 1 , wherein when the trigger information is included in a MAC header, the processor is configured to generate the A-MPDU not to include one or more MPDUs requesting an immediate response.
7. The wireless communication terminal of claim 6 , wherein when the trigger information is included in the MAC header, the processor is configured to aggregate any one of an ACK frame and a Block ACK (BA) frame, with one or more MPDUs not requesting an immediate response, without one or more MPDUs requesting an immediate response to generate the A-MPDU.
8. The wireless communication terminal of claim 7 , wherein the one or more MPDUs not requesting an immediate response comprises at least one of a QoS Null frame not requesting an ACK for the QoS Null frame and an Action No Ack frame not requesting an ACK for the Action No Ack frame.
9. A base wireless communication terminal communicating wirelessly, the terminal comprising:
a transceiver; and
a processor,
wherein the processor is configured to:
generate trigger information to a plurality of wireless communication terminals using the transceiver, wherein the trigger information triggers a transmission of a trigger-based physical layer protocol data unit (PPDU) by the wireless communication terminal and is included in a trigger frame which include a first signaling field, wherein the first signaling field indicates whether aggregating one or more MPDUs requesting an immediate response to generate an Aggregate-MAC Protocol Data Unit (A-MPDU) is allowed and indicates a maximum number of TIDs that is allowed to be aggregated in the A-MPDU when the wireless terminal generates the A-MPDU,
when a wireless communication terminal corresponding to the first signaling field is not allowed to aggregate one or more MPDUs requesting an immediate response to generate the A-MPDU, set a value of the first signaling field to a predetermined value,
when the wireless communication terminal corresponding to the first signaling field is allowed to aggregate one or more MPDUs requesting an immediate response to generate the A-MPDU, set the value of the first signaling field according to the maximum number of TIDs,
transmit the trigger frame, and
receive the trigger-based PPDU including the A-MPDU from at least one of the plurality of wireless communication terminals,
wherein one or more MPDUs requesting an immediate response are aggregated or not, based on the first signaling field, in the A-MPDU.
10. The base wireless communication terminal of claim 9 , wherein the maximum number of TIDs indicates a maximum number of TIDs requesting an immediate response that is allowed to be aggregated in the A-MPDU.
11. The base wireless communication terminal of claim 9 , wherein one or more Quality of Service (QoS) null frames not requesting an ACK for the QoS null frames are aggregated in the A-MPDU regardless of the maximum number of TIDs.
12. The base wireless communication terminal of claim 9 , wherein the trigger frame comprises a second signaling field indicating whether channel sensing is required when a wireless communication terminal transmits a response to the trigger information through trigger-based Physical Layer Protocol Data Unit (PPDU),
wherein the processor is configured to set the value of the first signaling field based on the value of the second signaling field.
13. The base wireless communication terminal of claim 12 , wherein when the second signaling field is set to indicate that channel sensing is not required when the wireless communication terminal transmitting the response to the trigger information transmits the trigger-based PPDU, the processor is configured to set the value of the first signaling field to the predetermined value.
14. The base wireless communication terminal of claim 13 , wherein the trigger frame comprises a third signaling field indicating information on a length of the trigger-based PPDU,
wherein the processor is configured to set the value of the first signaling field based on a value of the third signaling field.