Hi Bo,
Please help to add the following SPs to the MAC queue:
SP1: Do you agree to add the following to the 11bp SFD:
-
For AMP frames used for communication with Active Tx, bi-static Backscatter and mono-static Backscatter non-AP AMP STAs, the Type field is the first 4 LSBs of the Frame Control field.
[Reference: 26/0123r0, 25/1547r0, 26/0961r0]
SP2:
Do you agree to amend motion FM-17 in the11bp SFD as:
-
FM-17: The length of the ID field is based on the frame type/use case:
-
12 bits for AMP enabled non-AP STAs,
-
Either 12 or16 bits for active TX non-AP AMP STAs and bi-static backscatter non-AP AMP STAs, -
16 bits for backscatter non-AP AMP STAs.
[Reference: 26/0123r0, 25/1547r0, 26/0961r0]
SP3: Do you agree to add the following to the 11bp SFD:
-
The FCS field of the AMP Ack frame carries the 8-bit CRC.
-
The 8-bit CRC is the 8 LSBs of the output of the 16-bit CRC engine from IEEE 802.11ba.
-
The 8-bit CRC is the 8 LSBs of the output of the 16-bit CRC engine from IEEE 802.11ba.
[Reference: 26/0123r0, 25/1547r0, 26/0593r1, 26/0961r0]
SP4: Do you agree to add the following to the 11bp SFD:
-
The maximum length of the frame body field of AMP frames used for communication with Active Tx, mono-static Backscatter and bi-static Backscatter non-AP AMP STAs is 64 Octets.
-
The length of the frame body field is indicated by a 6-bits Length field in the MAC Header field.
[Reference: 26/0123r0, 25/1547r0, 26/0593r1, 26/0961r0]
SP5: Do you agree to add the following to the 11bp SFD:
-
802.11bp defines an AMP RFID frame to carry the UHF Commands supported by 11bp.
-
Note – the supported UHF commands are: Select, Read, Write, Authenticate
-
Note – the supported UHF commands are: Select, Read, Write, Authenticate
[Reference: 25-1102r1, 26/0961r0]
SP6: Do you agree to add the following to the 11bp SFD:
-
An AMP Energizer may request an AMP AP to setup of WPT/Excitation transmission without associating with the AMP AP.
-
If the AMP AP accepts the request, the AMP AP shall assign an unassociated STA ID (USID) to the AMP Energizer.
[Reference: 26/0960]
SP7: Do you agree to add the following to the 11bp SFD:
-
AMP AP may advertise (in Beacon, Probe Response, Association Response frames etc.) the types of AMP Energizers (WPT or Excitation) it supports and also if unassociated AMP Energizers
are supported.
[Reference: 26/0960]
SP8: Do you agree to add the following to the 11bp SFD:
-
A S1G mono-static backscatter AMP AP may transmit an AMP TX Announcement frame at the start of its TXOP to protect the medium for the duration of its subsequent AMP transmission(s).
-
Another S1G mono-static backscatter AMP AP that receive the AMP TX Announcement frame shall defer its mono-static backscatter AMP transmissions for the duration indicated in the
frame.
[Reference: 26/0963]
SP9: Do you agree to add the following to the 11bp SFD:
-
A S1G mono-static backscatter AMP AP may transmit an AMP TX Announcement frame with Transmission Duration set to zero to cancel the medium protection by an earlier AMP TX Announcement
frame.
[Reference: 26/0963]
SP10: Do you agree to add the following to the 11bp SFD:
-
The S1G AMP Uplink PPDU is used to carry the AMP TX Announcement frame.
[Reference: 26/0963]
SP11: Do you agree to add the following to the 11bp SFD:
-
Active Tx non-AP AMP STAs and bi-static Backscatter non-AP AMP STAs shall use EUI-64 MAC address as their permanent identifier.
[Reference:
26/0962]
Best Regards,
Rojan Chitrakar
From: Zhanjing Bao <bao.zhanjing@xxxxxxxxxx>
Sent: Wednesday, May 13, 2026 4:34 PM
To: STDS-802-11-TGBP@xxxxxxxxxxxxxxxxx
Subject: Re: [STDS-802-11-TGBP] MAC SP Request
Hi Bo,
Please add the following SFD MAC SP to the queue. Thank you.
Do you agree to add the following text to the 802.11bp SFD?
802.11bp defines a mechanism that allows the AMP energizer to respond to WPT control information sent by the AMP AP, with the feedback including success acknowledgement,
request for parameter modification, or rejection.
包占京00356255
Best Regards
Zhanjing Bao
Original
Hi Bo,
Please help to add the following MAC SFD SPs to the queue:
SP1
q
Do you agree to add the following text to the 802.11bp SFD?
§
Upon a successful AMP AP transmission of an MU-RTS TXS Trigger frame to an AMP Energizer, with the TXS Mode field equal to 2, the AMP AP may transmit an AMP PPDU before the indicated start time
of the TXOP allocation period as specified in the MU-RTS TXS Trigger frame for bistatic backscatter communication.
§
For an AMP Energizer that receives the MU-RTS TXS Trigger frame with the TXS Mode field equal to 2 from an AMP AP, the time allocation for the TXOP sharing shall start at the indicated start time
in the PPDU for bistatic backscatter communication.
§
The CTS frame from the AMP Energizer shall use default 6Mbps data rate (BPSK, 1/2 coding rate) when responding to the AMP AP (to determine the start time).
[Reference: 11-26/0905r0, 11-26/0906r0]
Clause 39.7.2 states:
SP2
q
Do you agree to add the following text to the 802.11bp SFD?
§ The AMP AP shall transmit an AMP DL Type 1 PPDU on the 20MHz assigned
for UL from a bistatic backscatter non-AP AMP STA to protect the channel from third party STA transmissions.
[Reference: 11-26/0905r0, 11-26/0906r0]
SP3
q
Do you agree to amend PM-92 in the 802.11bp SFD as:
-
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
•
40MHz center frequency channel number indication (1 bit)
•
Set to 0 to indicate channel number 3
•
Set to 1 to indicate channel number 11
•
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).
[Reference: 11-26/0905r0, 11-26/0906r0]
Note:
•
Channel number 3, with center freq. 2422 MHz is in the lower Operating Class 83 (See Annex-E Table E-4), corresponding to non-overlapping 20MHz channels 1 and 5.
•
Channel number 11, with center freq. 2462 MHz is in the upper Operating Class 84 (See Annex-E Table E-4), corresponding to non-overlapping 20MHz channels 9 and 13.
SP4
q
Do you agree to add the following text to the 802.11bp SFD?
-
The AMP Data field of the AMP DL Type 4 PPDU does not contain a Frame Body field, and the Frame Type field of the MAC Header of the AMP Data field has one type reserved to indicate DL
Type 4 PPDU for bistatic backscatter operation.
[Reference: 11-26/0905r0, 11-26/0906r0]
SP5
q
Do you agree to add the following text to the 802.11bp SFD?
-
A bistatic backscatter non-AP AMP STA determines the start time of the first UL slot, as the end time of the received AMP DL PPDU soliciting the UL PPDU, plus the delay time indicated
in the same AMP DL PPDU.
-
Note: The delay time may be fixed for a fixed size AMP DL Type 4 PPDU.
-
Note: The indication of the delay time being implicit or explicit is TBD.
[Reference: 11-26/0905r0, 11-26/0906r0]
Thanks and Regards
Ian
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