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Re: [STDS-802-11-TGBP] [EXT] [STDS-802-11-TGBP] SFD SP request

Hi Bo,

 

Please help to update the last two SPs:

  • Do you agree to add the following to 11bp SFD?
    • The U-SIG of AMP DL PPDUs are defined as in the table below
    • [Reference contributions]: 11-26/0528r1, 11-26/0091r0 and 11-25/2070r2

Category

Subfield

Bits

Description

U-SIG-1

Version identifier

3

PPDU BW

3

UL/DL

1

BSS color

6

TXOP

7

AMP Version

1

0: AMP; 1: Validate

AMP Mode

2

0: M-BST; 1: B-BST;

 2: non-BST; 3: Validate

Mode dependent Bits – Part 1

3

The definition of the bits depends on the AMP Mode bits setting

U-SIG-2

PPDU type & Compression Mode

2

Mode dependent Bits – Part 2

12

The definition of the bits depends on the AMP Mode bits setting

Disregard

1

Validate

1

CRC in U-SIG

4

Tail in U-SIG

6

Total # of Bits in U-SIG

52

 

 

  • Do you agree to add the following to 11bp SFD?
    • The U-SIG of AMP DL PPDUs for mono-static backscattering is defined as
      • Note: when AMP Mode bits indicate MS-BST
    • [Reference contributions]: 11-26/582r1

Category

Subfield

AMP

Description

U-SIG-1

Version identifier

3

PPDU BW

3

UL/DL

1

BSS color

6

TXOP

7

AMP Version

1

0: AMP; 1: Validate

AMP Mode

2

0: M-BST; 1: B-BST;

 2: non-BST; 3: Validate

Multi-TXOP

1

0: no more TXOP;

1: more TXOPs

Session ID

2

Session ID 1 to 3

U-SIG-2

PPDU type & Compression Mode

2

Partial STAID

12

12 LSB of STAID

Disregard

2

CRC in U-SIG

4

Tail in U-SIG

6

Total # of Bits in U-SIG

52

 

 

Thanks,

Rui

 

From: Rui Cao <rui.cao_2@xxxxxxx>
Sent: Thursday, March 12, 2026 1:48 AM
To: STDS-802-11-TGBP@xxxxxxxxxxxxxxxxx
Subject: Re: [STDS-802-11-TGBP] [EXT] [STDS-802-11-TGBP] SFD SP request

 

Caution: This is an external email. Please take care when clicking links or opening attachments. When in doubt, report the message using the 'Report this email' button

 

Hi Bo,

 

Please add the following SFD SPs in the list:

  • Do you agree to add the following to 11bp SFD?
    • For delayed responses of mono-static backscattering, the AMP non-AP STA shall start the transmission of response UL PPDU within [T3*0.9 - 1us, T3*1.1 + 1us]
    • Note: T3 is nominal response time, the name is TBD
    • Note: delayed responses have >16us response time
  • Supporting doc: 11-26/600r0

 

  • Do you agree to add the following to 11bp SFD?
    • For mono-static backscattering commands with immediate response or no response, the AMP AP shall set the duration of BST excitation subfield to be (T1*1.2 + T4 *1.1)
      • Note: immediate response refers to the nominal response time of 16us
      • Note: T1 = 16 us, is the nominal immediate response time
      • Note: T4 is the nominal backscattering UL PPDU duration
  • Supporting doc: 11-26/600r0

 

  • Do you agree to add the following to 11bp SFD?
    • For mono-static backscattering commands with delayed response, the AMP AP shall set the duration of BST excitation as

                                                T3*1.1+1 +T4*1.1 (in unit of micro-second)

      • Note: T3 is nominal response time of delayed response
      • Note: T4 is the nominal backscattering UL PPDU duration
      • Note: delayed response refers to the nominal response time larger than 16us
  • Supporting doc: 11-26/600r0

 

  • Do you agree to add the following to 11bp SFD?
    • The pseudo random phase rotation for WUP-Excitation subfield in 2.4GHz is up to AMP AP’s implementation

[Reference contributions]: 11-26/600r1

 

  • Do you agree to add the following to 11bp SFD?
    • The per-symbol pseudo random phase rotation for Data and BST-Excitation subfield in 2.4GHz should be generated using data scrambler LFSR defined in 17.3.5.5 (PHY DATA scrambler and descrambler) REVmf D2.0 with all 1s initial state
    • Note: the 127-bit sequence as in equation (17-25) in REVmf D2.0
  • [Reference contributions]: 11-26/600r0

 

  • Do you agree to add the following to 11bp SFD?
    • The U-SIG of AMP DL PPDUs are defined as in the table below
    • [Reference contributions]: 11-26/582r1
    •  

Category

Subfield

Bits

Description

U-SIG-1

Version identifier

3

PPDU BW

3

UL/DL

1

BSS color

6

TXOP

7

AMP Version

1

0: AMP; 1: Validate

AMP Mode

2

0: MSB; 1: BSB;

 2: non-BS; 3: Validate

Mode dependent Bits – Part 1

3

The definition of the bits depends on the AMP Mode bits setting

U-SIG-2

PPDU type & Compression Mode

2

Mode dependent Bits – Part 2

14

The definition of the bits depends on the AMP Mode bits setting

CRC in U-SIG

4

Tail in U-SIG

6

Total # of Bits in U-SIG

52

 

  • Do you agree to add the following to 11bp SFD?
    • The U-SIG of AMP DL PPDUs for mono-static backscattering is defined as
      • Note: when AMP Mode bits indicate MS-BST
    • [Reference contributions]: 11-26/582r1, 11-26/0091r0, 11-25/2070r2

 

Category

Subfield

AMP

Description

U-SIG-1

Version identifier

3

PPDU BW

3

UL/DL

1

BSS color

6

TXOP

7

AMP Version

1

0: AMP; 1: Validate

AMP Mode

2

0: MSB; 1: BSB;

 2: non-BS; 3: Validate

Multi-TXOP

1

0: no more TXOP;

1: more TXOPs

Session ID

2

Session ID 1 to 3

U-SIG-2

PPDU type & Compression Mode

2

Partial STAID

12

12 LSB of STAID

Disregard

2

CRC in U-SIG

4

Tail in U-SIG

6

Total # of Bits in U-SIG

52

 

 

Thanks,

Rui

 

From: Alice Jialing Li Chen <jialing.li.phd2@xxxxxxxxx>
Sent: Wednesday, March 11, 2026 6:12 PM
To: STDS-802-11-TGBP@xxxxxxxxxxxxxxxxx
Subject: [EXT] [STDS-802-11-TGBP] SFD SP request

 

Caution: This is an external email. Please take care when clicking links or opening attachments. When in doubt, report the message using the 'Report this email' button

 

Hi Bo,

In 11-25/1692r21 slide 80, could you please change my deferred SP to the following? It's better to run it after the first SP of 11-26/582r0 if it is queued.

  • SP: Do you agree to add the following to the 802.11bp SFD?
    • In the U-SIG field in DL AMP PPDUs, if the AMP Mode indicates bistatic backscatter communication, the U-SIG field includes the following mode dependent contents:
      • Uplink channel for bistatic backscatter communication (1 bit)
        • Set to 0 to indicate the lower 20MHz channel relative to downlink
        • Set to 1 to indicate the upper 20MHz channel relative to downlink
      • Bistatic Exciter transmission flag (1 bit)
        • Set to 0 to indicate the PPDU is transmitted by an AMP AP
        • Set to 1 to indicate the PPDU is transmitted by a bistatic exciter
      • Bistatic Exciter Identification (TBD bits)
      • Reserved bits (at least 2 bits, 1 Validate, 1 Disregard)

[Reference contributions: 11-26/0091r0, 11-25/2070r2]


Could you please add the following SP to the queue?

  • SP: Do you agree to add the following to the 802.11bp SFD:
    • In the data field of AMP UL active transmission in 2.4 GHz, 4Mbps data rate only uses 0.125us chip duration, Manchester encoding and OOK modulation

[Reference contributions: 11-26/0615r0]

Regards,
Alice
Qualcomm

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