Techniques for transmitting information related to a PPDU format in wireless local area network system
According to various embodiments, a receiving station (STA) may receive a physical layer protocol data unit (PPDU). The PPDU may include a first signal field and a second signal field. The first signal field may include 3-bit information. The receiving STA may determine whether the PPDU is related to single user (SU) transmission or multiple user (MU) transmission, whether the PPDU is related to orthogonal frequency division multiple access (OFDMA), whether the PPDU is related to multi-user multiple input multiple output (MU-MIMO), and whether the PPDU is related to a trigger-based (TB) PPDU, based on the 3-bit information.
1. A method performed in a receiving station (STA) of a wireless local area network (WLAN) system, the method comprising:
receiving a physical layer protocol data unit (PPDU),
wherein the PPDU includes a legacy signal (L-SIG), a repeated L-SIG (RL-SIG), and a universal signal (U-SIG),
wherein the L-SIG is contiguous to the RL-SIG, and the L-SIG includes same bit information as the RL-SIG,
wherein a result of a “modulo 3” operation for a value of a length field included in the L-SIG is zero (0),
wherein the RL-SIG is contiguous to the U-SIG, and the U-SIG includes two symbols,
wherein the U-SIG includes a physical (PHY) version identifier field having a length of 3 bits,
wherein the PHY version identifier field has a pre-determined value for identifying Extremely High Throughput (EHT),
wherein the U-SIG includes a basic service set (BSS) color field and a transmission opportunity (TXOP) duration field related to the PPDU,
wherein the U-SIG further includes 3-bit information,
wherein the 3-bit information has a first value for identifying that the PPDU is received based on orthogonal frequency division multiple access (OFDMA) technique for multiple users, the 3-bit information has a second value for identifying that the PPDU is received based on non-OFDMA technique for multiple users, and the 3-bit information has a third value for identifying that the PPDU is received for a single user; and
decoding the U-SIG to interpret the PPDU.
2. The method of claim 1 , wherein the PPDU further includes an EHT signal (EHT-SIG), and the EHT-SIG is configured based on a common field and a user specific field.
3. The method of claim 2 , wherein contents of the EHT-SIG is determined based on the 3-bit information.
4. A method performed in a transmitting station (STA) of a wireless local area network (WLAN) system, the method comprising:
generating a physical layer protocol data unit (PPDU),
wherein the PPDU includes a legacy signal (L-SIG), a repeated L-SIG (RL-SIG), and a universal signal (U-SIG),
wherein the L-SIG is contiguous to the RL-SIG, and the L-SIG includes same bit information as the RL-SIG,
wherein a result of a “modulo 3” operation for a value of a length field included in the L-SIG is zero (0),
wherein the RL-SIG is contiguous to the U-SIG, and the U-SIG includes two symbols, wherein the U-SIG includes a physical (PHY) version identifier field having a length of 3 bits,
wherein the PHY version identifier field has a pre-determined value for identifying Extremely High Throughput (EHT),
wherein the U-SIG includes a basic service set (BSS) color field and a transmission opportunity (TXOP) duration field related to the PPDU,
wherein the U-SIG further includes 3-bit information,
wherein the 3-bit information has a first value for identifying that the PPDU is transmitted based on orthogonal frequency division multiple access (OFDMA) technique for multiple users, the 3-bit information has a second value for identifying that the PPDU is transmitted based on non-OFDMA technique for multiple users, and the 3-bit information has a third value for identifying that the PPDU is transmitted for a single user; and
transmitting the PPDU.
5. A receiving station (STA) used in a wireless local area network (WLAN) system, the receiving STA comprising:
a transceiver transmitting/receiving a radio signal; and
a processor coupled to the transceiver, wherein the processor is configured to:
receive a physical layer protocol data unit (PPDU),
wherein the PPDU includes a legacy signal (L-SIG), a repeated L-SIG (RL-SIG), and a universal signal (U-SIG),
wherein the L-SIG is contiguous to the RL-SIG, and the L-SIG includes same bit information as the RL-SIG,
wherein a result of a “modulo 3” operation for a value of a length field included in the L-SIG is zero (0),
wherein the RL-SIG is contiguous to the U-SIG, and the U-SIG includes two symbols,
wherein the U-SIG includes a physical (PHY) version identifier field having a length of 3 bits,
wherein the PHY version identifier field has a pre-determined value for identifying Extremely High Throughput (EHT),
wherein the U-SIG includes a basic service set (BSS) color field and a transmission opportunity (TXOP) duration field related to the PPDU,
wherein the U-SIG further includes 3-bit information,
wherein the 3-bit information has a first value for identifying that the PPDU is received based on orthogonal frequency division multiple access (OFDMA) technique for multiple users, the 3-bit information has a second value for identifying that the PPDU is received based on non-OFDMA technique for multiple users, and the 3-bit information has a third value for identifying that the PPDU is received for a single user; and
decode the U-SIG to interpret the PPDU.
6. A transmitting station (STA) used in a wireless local area network (WLAN) system, the transmitting STA comprising:
a transceiver transmitting/receiving a radio signal; and
a processor coupled to the transceiver, wherein the processor is configured to:
generate a physical layer protocol data unit (PPDU),
wherein the PPDU includes a legacy signal (L-SIG), a repeated L-SIG (RL-SIG), and a universal signal (U-SIG),
wherein the L-SIG is contiguous to the RL-SIG, and the L-SIG includes same bit information as the RL-SIG,
wherein a result of a “modulo 3” operation for a value of a length field included in the L-SIG is zero (0),
wherein the RL-SIG is contiguous to the U-SIG, and the U-SIG includes two symbols,
wherein the U-SIG includes a physical (PHY) version identifier field having a length of 3 bits,
wherein the PHY version identifier field has a pre-determined value for identifying Extremely High Throughput (EHT),
wherein the U-SIG includes a basic service set (BSS) color field and a transmission opportunity (TXOP) duration field related to the PPDU,
wherein the U-SIG further includes 3-bit information,
wherein the 3-bit information has a first value for identifying that the PPDU is transmitted based on orthogonal frequency division multiple access (OFDMA) technique for multiple users, the 3-bit information has a second value for identifying that the PPDU is transmitted based on non-OFDMA technique for multiple users, and the 3-bit information has a third value for identifying that the PPDU is transmitted for a single user; and
transmit the PPDU.
7. An apparatus used in a wireless local area network (WLAN) system, the apparatus comprising:
a processor; and
a memory coupled to the processor, wherein the processor is configured to:
obtain a physical layer protocol data unit (PPDU),
wherein the PPDU includes a legacy signal (L-SIG), a repeated L-SIG (RL-SIG), and a universal signal (U-SIG),
wherein the L-SIG is contiguous to the RL-SIG, and the L-SIG includes same bit information as the RL-SIG,
wherein a result of a “modulo 3” operation for a value of a length field included in the L-SIG is zero (0),
wherein the RL-SIG is contiguous to the U-SIG, and the U-SIG includes two symbols,
wherein the U-SIG includes a physical (PHY) version identifier field having a length of 3 bits,
wherein the PHY version identifier field has a pre-determined value for identifying Extremely High Throughput (EHT),
wherein the U-SIG includes a basic service set (BSS) color field and a transmission opportunity (TXOP) duration field related to the PPDU,
wherein the U-SIG further includes 3-bit information,
wherein the 3-bit information has a first value for identifying that the PPDU is received based on orthogonal frequency division multiple access (OFDMA) technique for multiple users, the 3-bit information has a second value for identifying that the PPDU is received based on non-OFDMA technique for multiple users, and the 3-bit information has a third value for identifying that the PPDU is received for a single user; and
decode the U-SIG to interpret the PPDU.