Method for wireless communication with wireless communication terminal for long range transmission and wireless communication terminal using same
Provided is a base wireless communication terminal that communicates with a Long Range (LR) wireless communication terminal supporting LR wireless communication. The base wireless communication terminal includes a transceiver and a processor. The processor is configured to set length information included in a non-LR preamble, which is a preamble for a non-LR wireless communication terminal that does not support LR wireless communication, to be longer than a length from a predetermined point in a Physical layer Protocol Data Unit (PPDU) to an end point of the PPDU, and transmits the PPDU including the non-LR preamble to the LR wireless communication terminal using the transceiver. In this case, the length information is information for indicating a length from a predetermined point in the PPDU to an end point of the PPDU.
1. A base wireless communication terminal that communicates with a Long Range (LR) wireless communication terminal supporting LR wireless communication, the base wireless comprising:
a transceiver; and
a processor,
wherein the processor is configured to set length information included in a non-LR preamble, which is a preamble for a non-LR wireless communication terminal that does not support LR wireless communication, as a length from a predetermined point in the PPDU to a point corresponding to a time point in which an uplink transmission of the LR wireless communication terminal corresponding to a Physical layer Protocol Data Unit (PPDU) is completed, transmit the PPDU including the non-LR preamble to the LR wireless communication terminal using the transceiver, and when the uplink transmission is not received from the LR wireless communication terminal, re-transmit a portion after the non-LR preamble without transmitting a portion before the non-LR preamble in the PPDU,
wherein the length information is information for indicating a length from a predetermined point in the PPDU to an end point of the PPDU.
2. The base wireless communication terminal of claim 1 , wherein the processor is configured to transmit a data field of the PPDU through a Resource Unit (RU) allocated to the LR wireless communication terminal, and receive the uplink transmission through an RU allocated to the LR wireless communication terminal.
3. The base wireless communication terminal of claim 2 , wherein the RU allocated to the LR wireless communication terminal is allocated when the LR wireless communication terminal and the base wireless communication terminal are associated, and is maintained until the LR wireless communication terminal and the base wireless communication terminal are disassociated or reassociated.
4. The base wireless communication terminal of claim 1 , wherein when the base wireless communication terminal is scheduled to transmit an ACK for uplink transmission of the LR wireless communication terminal to the LR wireless communication terminal, the processor is configured to set the length information included in the non-LR preamble as a length from a predetermined point in the PPDU to a point corresponding to a time point in which a downlink transmission corresponding to an uplink transmission of the LR wireless communication terminal is completed,
wherein the uplink transmission of the LR wireless communication terminal is an uplink transmission corresponding to the PPDU.
5. The base wireless communication terminal of claim 4 , wherein the PPDU comprises a trigger frame for triggering an uplink transmission of the LR wireless communication terminal,
wherein the processor is configured to signal whether an ACK transmission for uplink transmission of the LR wireless communication terminal is scheduled using the trigger frame.
6. The base wireless communication terminal of claim 1 , wherein the PPDU comprises a first trigger frame for triggering an uplink transmission of the LR wireless communication terminal,
wherein when the base wireless communication terminal fails to receive the uplink transmission from the LR wireless communication terminal, the processor is configured to transmit a second trigger frame having the same sequence number as the first trigger frame, and
when the base wireless communication terminal receives the uplink transmission from the LR wireless communication terminal, the processor is configured to transmit a third trigger frame having a sequence number different from a sequence number of the first trigger frame when triggering a new uplink transmission after the uplink transmission.
7. An operation method of a base wireless communication terminal that communicates with a Long Range (LR) wireless communication terminal supporting LR wireless communication, the method comprising:
setting length information included in a non-LR preamble, which is a preamble for a non-LR wireless communication terminal that does not support LR wireless communication, as a length from a predetermined point in the PPDU to a point corresponding to a time point in which an uplink transmission of the LR wireless communication terminal corresponding to a Physical layer Protocol Data Unit (PPDU) is completed;
transmitting the PPDU including the non-LR preamble to the LR wireless communication terminal; and
when the uplink transmission is not received from the LR wireless communication terminal, re-transmitting a portion after the non-LR preamble without transmitting a portion before the non-LR preamble in the PPDU,
wherein the length information is information for indicating a length from a predetermined point in the PPDU to an end point of the PPDU.
8. The method of claim 7 , wherein the transmitting the PPDU comprises transmitting a data field of the PPDU through a Resource Unit (RU) allocated to the LR wireless communication terminal, further comprising receiving the uplink transmission through an RU allocated to the LR wireless communication terminal.
9. The method of claim 8 , wherein the RU allocated to the LR wireless communication terminal is allocated when the LR wireless communication terminal and the base wireless communication terminal are associated, and is maintained until the LR wireless communication terminal and the base wireless communication terminal are disassociated or reassociated.
10. The method of claim 7 , wherein the setting the length information included in the non-LR preamble comprises, when the base wireless communication terminal is scheduled to transmit an ACK for uplink transmission of the LR wireless communication terminal to the LR wireless communication terminal, setting the length information included in the non-LR preamble as a length from a predetermined point in the PPDU to a point corresponding to a time point in which a downlink transmission corresponding to an uplink transmission of the LR wireless communication terminal is completed,
wherein the uplink transmission of the LR wireless communication terminal is an uplink transmission corresponding to the PPDU.
11. The method of claim 10 , wherein the PPDU comprises a trigger frame for triggering an uplink transmission the LR wireless communication terminal,
wherein the transmitting the PPDU comprises signaling whether an ACK transmission for uplink transmission of the LR wireless communication terminal is scheduled using the trigger frame.
12. The method of claim 7 , wherein the PPDU comprises a first trigger frame for triggering an uplink transmission of the LR wireless communication terminal,
wherein when the base wireless communication terminal fails to receive the uplink transmission from the LR wireless communication terminal, the re-transmitting the portion after the non-LR preamble comprises:
when the base wireless communication terminal fails to receive the uplink transmission from the LR wireless communication terminal, transmitting a second trigger frame having the same sequence number as the first trigger frame, and
when the base wireless communication terminal receives the uplink transmission from the LR wireless communication terminal, transmitting a third trigger frame having a sequence number different from a sequence number of the first trigger frame when triggering a new uplink transmission after the uplink transmission.