Apparatus used in WLANs
The application relates to an apparatus and method used in Wireless Local Area Networks (WLANs). The apparatus includes: a wireless interface; and processor circuitry coupled to the wireless interface and configured to: generate a Physical layer Protocol Data Unit (PPDU) with a Low Density Parity Check (LDPC) coding scheme; and provide the PPDU to the wireless interface for transmitting, wherein the PPDU comprises one special codeword and more than one regular codeword and does not comprise a padding bit before Forward Error Correction (FEC) codes, and the regular codeword has a fixed codeword size, which can be different from a codeword size of the special codeword.
1. An apparatus, comprising:
a wireless interface; and
processor circuitry coupled to the wireless interface and configured to:
generate a Physical layer Protocol Data Unit (PPDU) with a Low Density Parity Check (LDPC) coding scheme; and
provide the PPDU to the wireless interface for transmitting, wherein
the PPDU comprises one special codeword and more than one regular codeword and does not comprise a padding bit before Forward Error Correction (FEC) codes, and the regular codeword has a fixed codeword size, which can be different from a codeword size of the special codeword.
2. The apparatus of claim 1 , wherein the special codeword is a last codeword of the PPDU.
3. The apparatus of claim 2 , wherein the special codeword comprises a repetition of part or whole of previous one or more codewords transmitted in a last Orthogonal Frequency Division Multiplexing (OFDM) symbol for transmitting the PPDU.
4. The apparatus of claim 2 , wherein the special codeword is a codeword, which is generated by puncturing an additional regular codeword of the fixed codeword size.
5. The apparatus of claim 2 , wherein when a number of bits in the special codeword is less than a threshold, the special codeword comprises a repetition of part or whole of previous one or more codewords transmitted in a last Orthogonal Frequency Division Multiplexing (OFDM) symbol for transmitting the PPDU.
6. The apparatus of claim 2 , wherein when a number of bits in the special codeword is larger than or equal to a threshold, the special codeword is a codeword, which is generated by puncturing an additional regular codeword of the fixed codeword size.
7. The apparatus of claim 1 , wherein the special codeword is positioned between two regular codewords of the PPDU.
8. The apparatus of claim 1 , wherein the special codeword is positioned between a first regular codeword and a second regular codeword of the PPDU.
9. The apparatus of claim 8 , wherein the special codeword is a repetition of part or whole of the first regular codeword of the PPDU, the first regular codeword comprising scrambling information.
10. A computer readable storage medium storing instructions thereon, the instructions, when executed by one or more processors, cause the one or more processors to:
generate a Physical layer Protocol Data Unit (PPDU) with a Low Density Parity Check (LDPC) coding scheme; and
provide the PPDU to a wireless interface for transmitting, wherein
the PPDU comprises one special codeword and more than one regular codeword and does not comprise a padding bit before Forward Error Correction (FEC) codes, and the regular codeword has a fixed codeword size, which can be different from a codeword size of the special codeword.
11. The computer readable storage medium of claim 10 , wherein the special codeword is a last codeword of the PPDU.
12. The computer readable storage medium of claim 11 , wherein the special codeword comprises a repetition of part or whole of previous one or more codewords transmitted in a last Orthogonal Frequency Division Multiplexing (OFDM) symbol for transmitting the PPDU.
13. The computer readable storage medium of claim 11 , wherein the special codeword is a codeword, which is generated by puncturing an additional regular codeword of the fixed codeword size.
14. The computer readable storage medium of claim 11 , wherein when a number of bits in the special codeword is less than a threshold, the special codeword comprises a repetition of part or whole of previous one or more codewords transmitted in a last Orthogonal Frequency Division Multiplexing (OFDM) symbol for transmitting the PPDU.
15. The computer readable storage medium of claim 11 , wherein when a number of bits in the special codeword is larger than or equal to a threshold, the special codeword is a codeword, which is generated by puncturing an additional regular codeword of the fixed codeword size.
16. The computer readable storage medium of claim 10 , wherein the special codeword is positioned between two regular codewords of the PPDU.
17. The computer readable storage medium of claim 10 , wherein the special codeword is positioned between a first regular codeword and a second regular codeword of the PPDU.
18. The computer readable storage medium of claim 17 , wherein the special codeword is a repetition of part or whole of the first regular codeword of the PPDU, the first regular codeword comprising scrambling information.
19. An apparatus, comprising:
one or more processors; and
memory storing instructions thereon, wherein the instructions when executed by the one or more processors, cause the one or more processors to:
generate a Physical layer Protocol Data Unit (PPDU) with a Low Density Parity Check (LDPC) coding scheme; and
provide the PPDU to a wireless interface for transmitting, wherein
the PPDU comprises one special codeword and more than one regular codeword and does not comprise a padding bit before Forward Error Correction (FEC) codes, and the regular codeword has a fixed codeword size, which can be different from a codeword size of the special codeword.
20. The apparatus of claim 19 , wherein the special codeword is a last codeword of the PPDU.
21. The apparatus of claim 20 , wherein the special codeword comprises a repetition of part or whole of previous one or more codewords transmitted in a last Orthogonal Frequency Division Multiplexing (OFDM) symbol for transmitting the PPDU.
22. The apparatus of claim 20 , wherein the special codeword is a codeword, which is generated by puncturing an additional regular codeword of the fixed codeword size.
23. The apparatus of claim 20 , wherein when a number of bits in the special codeword is less than a threshold, the special codeword comprises a repetition of part or whole of previous one or more codewords transmitted in a last Orthogonal Frequency Division Multiplexing (OFDM) symbol for transmitting the PPDU.
24. The apparatus of claim 20 , wherein when a number of bits in the special codeword is larger than or equal to a threshold, the special codeword is a codeword, which is generated by puncturing an additional regular codeword of the fixed codeword size.
25. The apparatus of claim 19 , wherein the special codeword is positioned between a first regular codeword and a second regular codeword of the PPDU.