Determining the number of symbols in a data field of a frame based on aggregation

Patent metadata

Field	Value
Publication number	US-12185427-B2
Application number	US-202318485274-A
Country	US
Kind code	B2
Filing date	Oct 11, 2023
Priority date	Jun 28, 2018
Publication date	Dec 31, 2024
Grant date	Dec 31, 2024

Abstract

A method for determining a number of symbols in a data field of a physical layer (PHY) protocol data unit (PPDU) is described. The method includes determining, by a wireless transmitting device, whether an aggregation subfield of a signal field of the PPDU is to be set to 1 and responsive to determining that the aggregation subfield of the signal field of the PPDU is not to be set to 1, calculating, by the wireless transmitting device, the number of symbols in the data field of the PPDU based on a PHY service data unit (PSDU) length value, wherein the PSDU length value is provided in a transmission vector (TXVECTOR) and the TXVECTOR also includes an aggregated media access control (MAC) protocol data unit pre-end-of-frame padding (APEP) length value of the PPDU.

First claim

What is claimed is:

1. A method for determining a number of symbols in a data field of a physical layer (PHY) protocol data unit (PPDU), the method comprising:
determining, by a wireless transmitting device, whether an aggregation subfield of a signal field of the PPDU is to be set to 1; and
responsive to determining that the aggregation subfield of the signal field of the PPDU is not to be set to 1, calculating, by the wireless transmitting device, the number of symbols in the data field of the PPDU based on a PHY service data unit (PSDU) length value,
wherein when low-density parity-check (LDPC) coding is used for the PPDU, the wireless transmitting device calculates the number of symbols in the data field of the PPDU as:

m
STBC

×

[

8
·
PSDU_LENGTH

+

N
service

m
STBC

·

N
DBPS

]

,

wherein the PSDU_LENGTH is the PSDU length value, m STBC is equal to 2 when space-time block coding (STBC) is used for the PPDU and is otherwise equal to 1, N DBPS indicates the number of data bits in Orthogonal Frequency Division Multiplexing (OFDM) symbols in the PPDU, and N service indicates the number of service bits, and
wherein the PSDU length value is provided in a transmission vector (TXVECTOR) and the TXVECTOR also includes an aggregated media access control (MAC) protocol data unit pre-end-of-frame padding (APEP) length value of the PPDU.

2. The method of claim 1 , wherein the PPDU is a sub-1-Gigahertz (S1G) single user (SU) PPDU.

3. The method of claim 2 , wherein the signal field of the PPDU is a SIG field or a SIG-A field of the PPDU.

4. The method of claim 1 , wherein the PSDU length value is provided in the TXVECTOR by a PSDU_LENGTH parameter and the APEP length value is provided in the TXVECTOR by an APEP_LENGTH parameter.

5. The method of claim 1 , further comprising:
transmitting, by the wireless transmitting device, the PPDU, wherein the PPDU includes a preamble portion and a PSDU, wherein the aggregation subfield is included in the preamble portion of the PPDU.

6. The method of claim 5 , wherein the aggregation subfield includes a single bit and the single bit being set to 1 indicates that aggregation is applied and the single bit being set to 0 indicates that aggregation is not applied.

7. The method of claim 1 , wherein when binary convolution coding (BCC) is used for the PPDU, the wireless transmitting device calculates the number of symbols in the data field of the PPDU as:

m
STBC

⁢

x
[

8
·
PSDU_LENGTH

+

N
service

+

N
tail

·

N
ES

m
STBC

·

N
DBPS

]

,

wherein N ES indicates the number of BCC encoders used for the PPDU and N tail indicates the number of tail bits used for encoding data of the data field.

8. A wireless transmitting device comprising:
a radio frequency transmitter; and
a processor to cause the wireless transmitting device to perform operations for determining a number of symbols in a data field of a physical layer (PHY) protocol data unit (PPDU), the operations comprising:
determining whether an aggregation subfield of a signal field of the PPDU is to be set to 1; and
responsive to determining that the aggregation subfield of the signal field of the PPDU is not to be set to 1, calculating the number of symbols in the data field of the PPDU based on a PHY service data unit (PSDU) length value,
wherein when low-density parity-check (LDPC) coding is used for the PPDU, the wireless transmitting device calculates the number of symbols in the data field of the PPDU as:

m
STBC

×

[

8
·
PSDU_LENGTH

+

N
service

m
STBC

·

N
DBPS

]

,

wherein the PSDU_LENGTH is the PSDU length value, m STBC is equal to 2 when space-time block coding (STBC) is used for the PPDU and is otherwise equal to 1, N DBPS indicates the number of data bits in Orthogonal Frequency Division Multiplexing (OFDM) symbols in the PPDU, and N service indicates the number of service bits, and
wherein the PSDU length value is provided in a transmission vector (TXVECTOR) and the TXVECTOR also includes an aggregated media access control (MAC) protocol data unit pre-end-of-frame padding (APEP) length value of the PPDU.

9. The wireless transmitting device of claim 8 , wherein the PPDU is a sub-1-Gigahertz (S1G) single user (SU) PPDU.

10. The wireless transmitting device of claim 8 , wherein the signal field of the PPDU is a SIG field or a SIG-A field of the PPDU.

11. The wireless transmitting device of claim 8 , wherein the PSDU length value is provided in the TXVECTOR by a PSDU_LENGTH parameter and the APEP length value is provided in the TXVECTOR by an APEP_LENGTH parameter.

12. The wireless transmitting device of claim 8 , wherein the operations fu

Assignees

• Newracom Inc

Inventors

• Noh Yujin
• Hwang Yongsuk
• Park Hyungu

Classifications

• H04L1/0643

  block codes · CPC title

• H04L1/0003

  by switching between different modulation schemes · CPC title

• H04L1/0061

  Error detection codes · CPC title

• H04L5/0007

  the frequencies being orthogonal, e.g. OFDM(A) or DMT · CPC title

• H04L1/0008

  by supplementing frame payload, e.g. with padding bits · CPC title