Hello Bo
Please add the below SP for tomorrow.
Do you agree to add the following content to TGbp SFD:
802.11bp defines "Enhanced Backscatter Capabilities” that increase the range and/or spatial coverage of non-AP AMP BS STAs.
- Enhanced capabilities include two mutually isolated antennas and an amplifier in-between
- Non-AP AMP BS STAs with “enhanced capabilities” report their capabilities to the AP
Thanks
Dror
From: You-Wei Chen <ywchen77115@xxxxxxxxx>
Sent: Wednesday, July 30, 2025 5:42 PM
To: STDS-802-11-TGBP@xxxxxxxxxxxxxxxxx
Subject: Re: [STDS-802-11-TGBP] 回复: [STDS-802-11-TGBP] TGbp SP request
Dear Bo,
Please add the following SPs to queue:
- Do you agree to add the following text to the SFD:
- The RATE field in L-SIG of an AMP DL PPDU in 2.4 GHz shall be set to the value representing 6 Mb/s in the 20 MHz channel spacing.
- The LENGTH field in L-SIG of an AMP DL PPDU in 2.4 GHz is set to a value satisfying the condition that the remainder is zero when LENGTH is divided by 3.
- Do you agree to add the following text to the SFD:
- An DL AMP PPDU in 2.4 GHz is identified in its U-SIG with the following setting:
- PHY version value sets to 0
- One or multiple Validate bit subfields sets to 0.
BR,
You-Wei
亓祎男 <00001e2bb50f6a93-dmarc-request@xxxxxxxxxxxxxxxxx> 於 2025年7月30日 週三 下午4:36寫道：
Hi Bo,
Please find the following SPs I plan to run tomorrow.
SP1:
Do you agree to capture the following text to TGbp SFD?
l The maximum clock offset for a non-backscatter STA is ±10,000 PPM when receiving.
SP2:
Do you agree to capture the following text to TGbp SFD?
• IEEE 802.11bp will specify that the same chip duration is used for AMP sync field and AMP data field of a single AMP UL PPDU in 2.4 GHz.
DCN:11-25/1262, 11-25/0790, 11-25/1232
Best regards,
Yinan
发件人: Nelson Costa <nelson@xxxxxxxx>
发送时间: 2025年7月30日 13:10
收件人: STDS-802-11-TGBP@xxxxxxxxxxxxxxxxx
主题: Re: [STDS-802-11-TGBP] TGbp SP request
Hi Bo,
Please find the following SP I would like to run tomorrow. This is intended as an SFD motion.
SP1:
- Do you agree add the following to the TGbp SFD?
- 11bp defines at least one mode of bistatic backscatter that can use frequency shifting within a 40 MHz channel.
- Existing 40 MHz medium protection mechanisms will be leveraged.
References: 11-25/1228, 11-25/1229, 11-24/2128, 11-24/2002
Cheers,
Nelson.
On Wed, Jul 30, 2025 at 7:45 AM Ian Bajaj <0000340c29b22c99-dmarc-request@xxxxxxxxxxxxxxxxx> wrote:
Hi Bo,
Please find the straw polls I plan to run tomorrow. All are intended for SFD motion.
- Do you agree to add the following text to TGbp SFD?
- IEEE 802.11bp allows a non-AP AMP STA to report the transmission time it can sustain. Furthermore, a one-time report of a fixed multiplicative factor of the transmission time, may be reported to indicate the time that the non-AP AMP STA can sustain other modes of operation. How the non-AP AMP STA may determine these times is TBD.
- Note:
- Other modes of operation may include reception, channel sensing, and idle.
- Idle mode refers to a mode of operation with no RF activity, i.e. the non-AP AMP STA cannot transmit or receive any frames in this mode.
[Reference: 11-25/0788r0, 11-25/1243r0]
SP2
- Do you agree to add the following text to TGbp SFD?
- IEEE 802.11bp defines an AMP SP frame as one type of AMP Frame to carry AMP Service Period information.
[Reference: 11-25/0039r0, 11-25/0285r1, 11-25/0787r0, 11-25/1244r0]
SP3
- Do you agree to add the following text to TGbp SFD?
- The AMP SP Frame carries the SP ID, SP Start Time, SP Interval, and the SP Minimum Wake Duration. The SP ID serves to uniquely identify the AMP Service Period.
[Reference: 11-25/0039r0, 11-25/0285r1, 11-25/0787r0, 11-25/1244r0]
SP4
- Do you agree to add the following text to TGbp SFD?
- IEEE 802.11bp defines an AMP SP Advert frame as a variant of AMP SP Frame to carry timing synchronization information that is equivalent to the time remaining to the start of the SP. The timing synchronization information may be expressed as a function of the SP Advert Interval, and SP Advert count, or as partial TSF bits of the AMP AP’s TSF.
- Note:
- The SP Advert Interval is the periodicity of the AMP SP Advert frame.
- The SP Advert Count is a decremental counter, that is counted down in each subsequent AMP SP Advert frame.
[Reference: 11-25/0039r0, 11-25/0285r1, 11-25/0787r0, 11-25/1244r0]
SP5
- Do you agree to add the following text to TGbp SFD?
- AMP Service Period allows a Backscatter non-AP AMP STA to enter doze state after a minimum wake up time since the start of the AMP Service Period, if the Backscatter non-AP AMP STA does not receive any AMP DL PPDU from the AMP AP, and can support duty-cycle operation.
[Reference: 11-25/0039r0, 11-25/0285r1, 11-25/0787r0, 11-25/1244r0]
SP6
- Do you agree to add the following text to TGbp SFD?
- IEEE 802.11bp allows a non-AP AMP STA to report its clock accuracy to the AMP AP.
[Reference: 11-25/0039r0, 11-25/0285r1, 11-25/0787r0, 11-25/1244r0, 11-25/1245r0]
SP7
- Do you agree to add the following text to TGbp SFD?
- IEEE 802.11bp defines AMP Beacon frame as one type of AMP frame to carry AMP TSF in the Frame Body.
- The other fields carried in the AMP Beacon are TBD.
[Reference: 11-25/0039r0, 11-25/0285r1, 11-25/0787r0, 11-25/1247r0]
SP8
- Do you agree to add the following text to TGbp SFD?
- The length of the AMP TSF field carried in the AMP Beacon is 24 bits. The AMP TSF field carries the partial TSF of the AMP AP’s TSF.
[Reference: 11-25/0039r0, 11-25/0285r1, 11-25/0787r0, 11-25/1247r0]
SP9
- Do you agree to add the following text to TGbp SFD?
- The AMP AP’s TSF bits [6:29] is carried in the AMP TSF field in the AMP Beacon Frame.
[Reference: 11-25/0039r0, 11-25/0285r1, 11-25/0787r0, 11-25/1247r0]
SP10
- Do you agree to add the following text to TGbp SFD?
- IEEE 802.11bp defines AWUR frame as one type of AMP frame with the Frame Body including WUR Frame (excluding FCS).
- Note: AWUR means Ambient Wake-up Radio
[Reference: 11-25/1246r0]
Kind Regards
Ian
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