Wireless communication method using trigger information, and wireless communication terminal

1. A base wireless communication terminal that wirelessly communicates with a plurality of wireless communication terminal, the base wireless communication terminal comprising:

a transceiver; and

a processor,

wherein the processor is configured to:

generate a trigger MAC Protocol Data Unit (MPDU) including trigger information which triggers an uplink (UL) transmission of a wireless communication terminal to the base wireless communication terminal, and includes information on a resource unit (RU) allocated for the UL transmission of the wireless communication terminal and information on a length of the UL transmission,

transmit a PLCP Protocol Data Unit (PPDU) including an Aggregate-MAC Protocol Data Unit (A-MPDU) comprising the trigger MPDU including the trigger information and one or more data MPDUs including data to the wireless communication terminal by using the transceiver, and

receive ACK information indicating that the data is received, wherein the ACK information is transmitted from the wireless communication terminal based on the information on the RU and the information on the length of the UL transmission,

wherein the A-MPDU includes a plurality of trigger MPDUs including the trigger information.

2. The base wireless communication terminal of claim 1 , wherein each of the plurality of trigger MPDUs includes the same trigger information.

3. The base wireless communication terminal of claim 1 , wherein the processor is configured to transmit one of the plurality of trigger MPDUs first among the plurality of trigger MPDUs and one or more data MPDUs.

4. The base wireless communication terminal of claim 1 , wherein the processor is configured to insert the trigger information into a MAC header of the one or more data MPDUs.

5. The base wireless communication terminal of claim 1 , wherein the processor is configured to set an ACK policy of the one or more data MPDUs to be a value which indicates that an immediate response is needed, and

receive the ACK information, within a predetermined time from a time point at an end of transmitting the PPDU, simultaneously with receiving ACK information from the other wireless communication terminal.

6. A wireless communication terminal that wirelessly communicates with a base wireless communication terminal, the wireless communication terminal comprising:

a transceiver; and

a processor,

wherein the processor is configured to:

receive, from the base wireless communication terminal, a PLCP Protocol Data Unit (PPDU) including an Aggregate-MAC Protocol Data Unit (A-MPDU) which includes a trigger MPDU including trigger information and one or more data MPDUs including data by using the transceiver, wherein the trigger information triggers an uplink (UL) transmission of the wireless communication terminal to the base wireless communication terminal, and includes information on a resource unit (RU) allocated for the UL transmission of the wireless communication terminal and information on a length of the UL transmission,

obtain the trigger MPDU from the A-MPDU, and

transmit ACK information indicating that the data is received to the base wireless communication terminal based on the information on the RU and the information on the length of the UL transmission,

wherein the A-MPDU includes a plurality of trigger MPDUs including the trigger information.

7. The wireless communication terminal of claim 6 , wherein each of the plurality of trigger MPDUs includes the same trigger information.

8. The wireless communication terminal of claim 6 , wherein one of the plurality of trigger MPDUs is the first MPDU among the plurality of trigger MPDUs and one or more data MPDUs,

wherein the processor is configured to obtain the trigger information from the first MPDU among the plurality of trigger MPDUs and one or more data MPDUs.

9. The wireless communication terminal of claim 6 , wherein the one or more data MPDUs include a MAC header including the trigger information.

10. The wireless communication terminal of claim 6 , wherein the trigger information comprises information indicating the one or more RUs allocated to a random access,

wherein the processor is configured to obtain a counter value randomly within a predetermined range, and determine whether to perform a random access based on the counter value and a number of the one or more RUs allocated to the random access.

11. The wireless communication terminal of claim 6 , wherein the processor is configured to transmit the ACK information, through a RU indicated by the information on the RU, within a predetermined time from a time point at an end of receiving the PPDU.

12. A method of operating a wireless communication terminal that wirelessly communicates with a base wireless communication terminal, the method comprising:

receiving, from the base wireless communication terminal, a PLCP Protocol Data Unit (PPDU) including an Aggregate-MAC Protocol Data Unit (A-MPDU) which includes a trigger MPDU including trigger information and one or more data MPDUs including data, wherein the trigger information triggers an uplink (UL) transmission of the wireless communication terminal to the base wireless communication terminal, and includes information on a resource unit (RU) allocated for the UL transmission of the wireless communication terminal and information on a length of the UL transmission,

obtaining the trigger MPDU from the A-MPDU, and

transmitting ACK information indicating that the data is received to the base wireless communication terminal based on the information on the RU and the information on the length of the UL transmission,

wherein the A-MPDU includes a plurality of trigger MPDUs including the trigger information.

13. The method of claim 12 , wherein each of the plurality of trigger MPDUs includes the same trigger information.

14. The method of claim 12 , wherein one of the plurality of trigger MPDUs is the first MPDU among the plurality of trigger MPDUs and one or more data MPDUs,

obtaining the trigger MPDU from the A-MPDU comprises

obtaining the trigger information from the first MPDU among the plurality of trigger MPDUs and one or more data MPDUs.