Granted Patent B2

US 12,634,180 · App. 18/261,072 · Granted May 19, 2026

Inventors: Eunsung Park (Seoul, KR); Jinyoung Chun (Seoul, KR); Jinsoo Choi (Seoul, KR); Dongguk Lim (Seoul, KR); Jeongki Kim (Seoul, KR)

Assignee: LG ELECTRONICS INC.

H04L27/2602H04L5/0044H04L5/0053H04L5/0064H04L5/0091

Abstract

Claims (55)

1 . A method in a wireless local area network (WLAN) system, the method comprising:

receiving, by a receiving station (STA), a non-High Throughput Duplicate Physical Protocol Data Unit (non-HT Dup PPDU) from a transmitting STA through a preset frequency band; and

decoding, by the receiving STA, the non-HT Dup PPDU,

wherein in the non-HT Dup PPDU, all fields are duplicated and transmitted every 20 MHz channel in the preset frequency band;

wherein the non-HT Dup PPDU includes a service field within a data field,

wherein the service field is composed of first to sixteenth bits,

wherein the preset frequency band is set based on the sixth to eighth bits,

wherein based on the preset frequency band being a 320 MHz band, the sixth bit is set to 1, the seventh bit is set to 1, and the eighth bit is set to 1,

wherein based on an overlapping basic service set high efficiency (OBSS HE) STA receiving the non-HT Dup PPDU, the OBSS HE STA does not read the eighth bit and reads only the sixth and seventh bits to determine a first bandwidth of the preset frequency band,

wherein based on the non-HT Dup PPDU being a trigger frame, the OBSS HE STA only decodes an uplink bandwidth (UL BW) field in a common information field of the trigger frame to interpret a second bandwidth of the preset frequency band, and

wherein by setting the sixth to eighth bits to 111, the OBSS HE STA determines that the first bandwidth indicated through the service field and the second bandwidth indicated through the UL BW field are the same and sets a network allocate vector (NAV) by viewing the non-HT Dup PPDU as a valid PPDU.

2 . The method of claim 1 , wherein bits of the service field may be transmitted in chronological order from the first bit to the sixteenth bit,

wherein the first to seventh bits are used for scrambler initialization,

wherein the eighth to sixteenth bits are reserved, or the eighth bit is used for bandwidth (BW) indication based on the CH_BANDWIDTH_IN_NON_HT TX parameter being present.

3 . The method of claim 1 , wherein the non-HT Dup PPDU further includes a legacy-short training field (L-STF), a legacy-long training field (L-LTF), and a legacy-signal (L-SIG),

wherein the L-STF, the L-LTF, the L-SIG, and the data field are duplicated and transmitted every 20 MHz channel.

4 . The method of claim 1 , wherein based on the preset frequency band being a 20 MHz band, the sixth bit is set to 0, the seventh bit is set to 0, and the eighth bit is set to 0.

5 . The method of claim 1 , wherein based on the preset frequency band being a 40 MHz band, the sixth bit is set to 0, the seventh bit is set to 1, and the eighth bit is set to 0.

6 . The method of claim 1 , wherein based on the preset frequency band being an 80 MHz band, the sixth bit is set to 1, the seventh bit is set to 0, and the eighth bit is set to 0.

7 . The method of claim 1 , wherein based on the preset frequency band being 160 MHz or 80+80 MHz band, the sixth bit is set to 1, the seventh bit is set to 1, and the eighth bit is set to 0.

8 . The method of claim 1 , wherein the non-HT Dup PPDU is a Null Data Packet (NDP) frame, a beacon frame, or the trigger frame.

9 . A receiving station (STA) in a wireless local area network (WLAN) system, the receiving STA comprising:

a memory;

a transceiver; and

a processor being operatively connected to the memory and the transceiver,

wherein the processor is configured to:

receive a non-High Throughput Duplicate Physical Protocol Data Unit (non-HT Dup PPDU) from a transmitting STA through a preset frequency band; and

decode the non-HT Dup PPDU,

wherein in the non-HT Dup PPDU, all fields are duplicated and transmitted every 20 MHz channel in the preset frequency band;

wherein the non-HT Dup PPDU includes a service field within a data field,

wherein the service field is composed of first to sixteenth bits,

wherein the preset frequency band is set based on the sixth to eighth bits,

wherein based on the preset frequency band being a 320 MHz band, the sixth bit is set to 1, the seventh bit is set to 1, and the eighth bit is set to 1,

wherein based on an overlapping basic service set high efficiency (OBSS HE) STA receiving the non-HT Dup PPDU, the OBSS HE STA does not read the eighth bit and reads only the sixth and seventh bits to determine a first bandwidth of the preset frequency band,

wherein based on the non-HT Dup PPDU being a trigger frame, the OBSS HE STA only decodes an uplink bandwidth (UL BW) field in a common information field of the trigger frame to interpret a second bandwidth of the preset frequency band, and

wherein by setting the sixth to eighth bits to 111, the OBSS HE STA determines that the first bandwidth indicated through the service field and the second bandwidth indicated through the UL BW field are the same and sets a network allocate vector (NAV) by viewing the non-HT Dup PPDU as a valid PPDU.

10 . A method in a wireless local area network (WLAN) system, the method comprising:

generating, by a transmitting station (STA), a non-High Throughput Duplicate Physical Protocol Data Unit (non-HT Dup PPDU); and

transmitting, by the transmitting STA, the non-HT Dup PPDU to a receiving STA through a preset frequency band,

wherein in the non-HT Dup PPDU, all fields are duplicated and transmitted every 20 MHz channel in the preset frequency band;

wherein the non-HT Dup PPDU includes a service field within a data field,

wherein the service field is composed of first to sixteenth bits,

wherein the preset frequency band is set based on the sixth to eighth bits,

wherein based on the preset frequency band being a 320 MHz band, the sixth bit is set to 1, the seventh bit is set to 1, and the eighth bit is set to 1,

wherein based on an overlapping basic service set high efficiency (OBSS HE) STA receiving the non-HT Dup PPDU, the OBSS HE STA does not read the eighth bit and reads only the sixth and seventh bits to determine a first bandwidth of the preset frequency band,

wherein based on the non-HT Dup PPDU being a trigger frame, the OBSS HE STA only decodes an uplink bandwidth (UL BW) field in a common information field of the trigger frame to interpret a second bandwidth of the preset frequency band, and

wherein by setting the sixth to eighth bits to 111, the OBSS HE STA determines that the first bandwidth indicated through the service field and the second bandwidth indicated through the UL BW field are the same and sets a network allocate vector (NAV) by viewing the non-HT Dup PPDU as a valid PPDU.

11 . The method of claim 10 , wherein bits of the service field may be transmitted in chronological order from the first bit to the sixteenth bit,

wherein the first to seventh bits are used for scrambler initialization,

wherein the eighth to sixteenth bits are reserved, or the eighth bit is used for bandwidth (BW) indication based on the CH_BANDWIDTH_IN_NON_HT TX parameter being present.

12 . The method of claim 10 , wherein the non-HT Dup PPDU further includes a legacy-short training field (L-STF), a legacy-long training field (L-LTF), and a legacy-signal (L-SIG),

wherein the L-STF, the L-LTF, the L-SIG, and the data field are duplicated and transmitted every 20 MHz channel.

13 . The method of claim 10 , wherein based on the preset frequency band being a 20 MHz band, the sixth bit is set to 0, the seventh bit is set to 0, and the eighth bit is set to 0.

14 . The method of claim 10 , wherein based on the preset frequency band being a 40 MHz band, the sixth bit is set to 0, the seventh bit is set to 1, and the eighth bit is set to 0.

15 . The method of claim 10 , wherein based on the preset frequency band being an 80 MHz band, the sixth bit is set to 1, the seventh bit is set to 0, and the eighth bit is set to 0.

Assignments (1)

Priority Claims (1)

Continuity (1)

References Cited (11)