| CPC H04L 1/0013 (2013.01) [H04L 1/0063 (2013.01); H04L 1/1812 (2013.01)] | 10 Claims |
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1. A method in a wireless local area network (WLAN) system, the method performed by a station (STA) and comprising:
receiving control information related to a length of a retransmission, wherein the length of retransmission is defined based on an initial transmission;
transmitting a first physical protocol data unit (PPDU) including a first legacy signal (L-SIG) field, a first repeated legacy signal (RL-SIG) field which is a repeat of the first L-SIG field and is contiguous to the first L-SIG field, a first signal field carrying information necessary to interpret the first PPDU, and a first data field,
wherein the first signal field includes 3-bit information related to a physical version of the first PPDU,
wherein the first data field is related to the initial transmission and includes a first information part and a first parity part;
after receiving a retransmission request, transmitting a second PPDU including a second L-SIG field, a second RL-SIG field which is a repeat of the second L-SIG field and is contiguous to the second L-SIG field, a second signal field carrying information necessary to interpret the second PPDU, and a second data field,
wherein the second signal field includes 3-bit information related to a physical version of the second PPDU,
wherein the second data field is related to the retransmission,
wherein the second data field includes at least a part of the first information part and the first parity part, and
wherein a length of the second data field is determined based on the control information.
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