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
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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
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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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