SP1
q Do you agree to add the following text to the 802.11bp SFD?
- The MAC Header of Active Tx and bistatic backscatter AMP frames shall have a fixed octet-aligned length.
[Reference: 11-26/1148r0]
SP2
q Do you agree to add the following text to the 802.11bp SFD?
- The MAC Header of Active Tx and bistatic backscatter AMP frames shall include the following fields:
- Frame Control
- Receiver ID
- Transmitter ID
- Type Dependent Control
- Length
- Length Multiplier
- Note: For some frame types with no Frame Body, the Type Dependent Control, Length and Length Multiplier fields may be replaced by another field.
[Reference: 11-26/1148r0]
SP3
q Do you agree to add the following text to the 802.11bp SFD?
- The AMP ACK Sync Frame Present field in the Type Dependent Control field of the AMP DL frame soliciting UL (e.g. AMP Trigger frame, AMP SP Advert frame) indicates the presence of the AMP ACK Sync frame for multi-slot channel access.
- The AMP ACK Sync frame is the AMP frame in MM-46, used to indicate the start of the second or subsequent slot.
- The AMP ACK Sync Frame Present field shall be set to 0 for bistatic backscatter AMP frames.
[Reference: 11-26/1148r0]
SP4
q Do you agree to amend MM-46 in the 802.11bp SFD?
- During a multi-slot uplink access TXOP for Active Tx non-AP AMP STAs, the AMP AP shall transmit a DL AMP PPDU carrying an AMP frame to indicate the start of the second or subsequent time-slot
., if the AMP ACK Sync Frame Present field is set to 1 in the Type Dependent Control field of the AMP frame of the AMP DL PPDU soliciting the UL AMP PPDU(s) (e.g. AMP Trigger frame, AMP SP Advert frame). - If AMP ACK Sync Frame Present field is set to 1 in the Type Dependent Control field of the AMP frame of the AMP DL PPDU soliciting UL AMP PPDU(s),
Aan Active Tx non- AP AMP STA eligible to transmit in a time slot other than the first slot, transmits its UL AMP PPDU at the end of the applicable IFS from the end of the DL AMP PPDU. - Note – the content of the AMP frame is TBD.
[Reference: 11-26/1148r0]
SP5
q Do you agree to add the following text to the 802.11bp SFD?
- The Receiver ID field in the Frame Control field in the AMP ACK Sync frame is set to the identifier of the non-AP AMP STA whose UL was successfully received by the AMP AP in the previous UL slot, and otherwise set to a broadcast identifier (e.g. all ones) when no UL frame was successfully received by the AMP AP in the previous UL slot.
[Reference: 11-26/1148r0]
SP6
q Do you agree to amend PM-94 in the 802.11bp SFD?
- IEEE 802.11bp defines an operation of an AMP AP with the center frequency of the UL signal from an active non-AP AMP STA located in the center of a 20 MHz channel for all data rates.
- IEEE 802.11bp defines an operation of an AMP AP with the center frequency of the UL signal from an active non-AP AMP STA not located in the center of a 20 MHz channel for 250kbps and 1Mbps.
- When the UL signal is not located in the center of the 20 MHz channel, it is located in either -5 MHz or +5 MHz relative to the center frequency of the 20 MHz channel.
- The support of this operation is optional for AMP AP STA and non-AP AMP STA. When this indication of the center frequency of the solicited UL signal not located in the center of a 20MHz channel is set to True, only the non-AP AMP STA(s) that support this operation shall transmit its UL PPDU.
SP7
q Do you agree to amend PM-101 in 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 a delay time.
- The delay time is the time period from the end of the AMP DL PPDU soliciting the UL PPDU till the start of the excitation field in the AMP DL Type 4 PPDU.
Note: The delay time may be fixed for a fixed size AMP frame in the AMP DL Type 4 PPDU.Note: The indication of the delay time being implicit or explicit is TBDis indicated in the AMP DL PPDU soliciting the UL PPDU.
[Reference: 11-26/0905r0, 11-26/0906r0]