Low power indoor frame format
Methods and apparatuses for encoding and decoding a physical layer (PHY) protocol data unit (PPDU) for low power indoor (LPI) wireless communication, which includes a preamble portion and a payload portion. The preamble portion includes a first universal signal field (U-SIG), the first U-SIG comprising information regarding a payload portion of the PPDU. The preamble portion further includes a second U-SIG, which contains identical information regarding the payload portion of the PPDU. The repetition of the U-SIG may improve robustness of the preamble portion detection and also enable auto-detection of the PPDU for LPI communication.
1. A method of encoding a physical layer (PHY) protocol data unit (PPDU) for low power indoor (LPI) wireless communication, the method comprising:
encoding a preamble portion of the PPDU, wherein the encoding further comprises:
encoding a first universal signal field (U-SIG), the first U-SIG comprising one or more information bits regarding a payload portion of the PPDU;
encoding a second U-SIG, the second U-SIG including identical one or more information bits regarding the payload portion of the PPDU; and
encoding a plurality of U-SIGs in addition to the first and second U-SIG, wherein each of the plurality of U-SIGs includes the identical one or more information bits regarding the payload portion of the PPDU, and wherein the second U-SIG and each of the plurality of U-SIGs in addition to the first and second U-SIG represent a respective time domain repetition of the first U-SIG.
2. The method of claim 1 , wherein the encoding of the first U-SIG is followed by the encoding of the second U-SIG.
3. The method of claim 1 further comprising applying a Dual sub-Carrier Modulation (DCM) to the second U-SIG.
4. The method of claim 1 further comprising applying a bitwise interleaver scheme to the second U-SIG.
5. The method of claim 1 , wherein the first U-SIG and the second U-SIG are encoded with a modulation and coding scheme (MCS) having a code rate greater than one half, the method further comprising:
adopting a first binary convolution code (BCC) puncturing pattern for the first U-SIG; and
adopting a second BCC puncturing pattern for the second U-SIG, wherein the second BCC puncturing pattern is different from the first BCC puncturing pattern.
6. The method of claim 1 , wherein the LPI wireless communication is defined for an extended range mode of operation.
7. The method of claim 6 , where the extended range mode of operation is defined for a MCS scheme of MCS0 using a single spatial stream in non-punctured channels having one of 80 MHz, 160 MHz and 320 MHz bandwidth intended for a single station (STA).
8. An apparatus of an access point (AP), the apparatus comprising a non-transitory memory storage unit, and a processing unit operably coupled to the non-transitory memory storage unit, the processing unit configured to:
encode a preamble portion of the PPDU for low power indoor (LPI) wireless communication, wherein the preamble portion of the PPDU comprises:
a first universal signal field (U-SIG), the first U-SIG comprising one or more information bits regarding a payload portion of the PPDU;
a second U-SIG, the second U-SIG including identical one or more information bits regarding the payload portion of the PPDU; and
a plurality of U-SIGs in addition to the first and second U-SIG, wherein each of the plurality of U-SIGs includes the identical one or more information bits regarding the payload portion of the PPDU and wherein the second U-SIG and each of the plurality of U-SIGs in addition to the first and second U-SIG represent a respective time domain repetition of the first U-SIG; and
transmit the encoded PPDU.
9. The apparatus of claim 8 , wherein a DCM scheme is applied to the second U-SIG by the processing unit.
10. The apparatus of claim 8 , wherein a bitwise interleaver scheme is applied to the second U-SIG by the processing unit.
11. The apparatus of claim 8 , wherein the first U-SIG and the second U-SIG are encoded with a modulation and coding scheme (MCS) having a code rate greater than one half, wherein
a first binary convolution code (BCC) puncturing pattern is applied, by the processing unit, to the first U-SIG; and
a second BCC puncturing pattern is applied, by the processing unit, to the second U-SIG, wherein the second BCC puncturing pattern is different from the first BCC puncturing pattern.
12. An apparatus of a station (STA), the apparatus comprising a non-transitory memory storage unit, and a processing unit operably coupled to the non-transitory memory storage unit, the processing unit configured to:
receive a preamble portion of the PPDU, wherein detection further comprises:
detecting a first universal signal field (U-SIG) in the preamble portion of the PPDU, the first U-SIG comprising one or more information bits regarding a payload portion of the PPDU;
detecting a second U-SIG, the second U-SIG includes identical one or more information bits regarding the payload portion of the PPDU;
detecting a plurality of U-SIGs in addition to the first U-SIG and the second U-SIG, wherein each of the plurality of U-SIGs includes the identical one or more information bits regarding the payload portion of the PPDU, and wherein the second U-SIG and each of the plurality of U-SIGs in addition to the first and second U-SIG represent a respective time domain repetition of the first U-SIG;
combining the plurality of U-SIGs with the first and second U-SIG; and
decoding the preamble portion of the PPDU based on the combined plurality of U-SIGs and first and second U-SIG.
13. The apparatus of claim 12 , wherein prior to combining the first and the second U-SIG, the processing unit is configured to:
perform a correlation check between the first and the second U-SIG; and
upon a positive correlation, automatically determine the PPDU is configured for low power indoor (LPI) wireless communication.
14. The apparatus of claim 13 , the automatic determining of the PPDU further includes automatically determining a MCS scheme of MCS0 using a single spatial stream in non-punctured channels having one of 80 MHz, 160 MHz and 320 MHz bandwidth intended for a single station (STA).
15. The apparatus of claim 12 , wherein the preamble portion further comprises a plurality of U-SIGs in addition to the first and second U-SIG, the processing is further configured to:
combine the plurality of U-SIGs with the first and the second U-SIG to improve robustness of the preamble portion detection.
16. The apparatus of claim 12 , wherein the processing unit is further configured to decode the second U-SIG applied with a DCM scheme.
17. The apparatus of claim 12 , wherein the first U-SIG and the second U-SIG in the received preamble portion of the PPDU are encoded with a modulation and coding scheme (MCS) having a code rate greater than one half, the processing unit further configured to detect the first U-SIG having a first binary convolution code (BCC) puncturing pattern; and detect the second U-SIG having a second BCC puncturing pattern, wherein the second BCC puncturing pattern is different from the first BCC puncturing pattern.
18. A method of encoding a physical layer (PHY) protocol data unit (PPDU) for low power indoor (LPI) wireless communication, the method comprising:
encoding a preamble portion of the PPDU, wherein the encoding further comprises:
encoding a first universal signal field (U-SIG), the first U-SIG comprising one or more information bits regarding a payload portion of the PPDU without an Extremely High Throughput (EHT) signal field (SIG) in the preamble portion;
encoding a second U-SIG, the second U-SIG including identical one or more information bits regarding the payload portion of the PPDU; and
encoding a plurality of U-SIGs in addition to the first and second U-SIG, wherein each of the plurality of U-SIGs includes the identical one or more information bits regarding the payload portion of the PPDU, and wherein the second U-SIG and each of the plurality of U-SIGs in addition to the first and second U-SIG represent a respective time domain repetition of the first U-SIG.