System and method for improved WLAN sensing measurement report

A method of wireless sensing performed over a wireless network, the method comprising:

• transmitting, by a sensing initiator, a sensing null data packet (NDP);
• receiving, from a sensing responder, a channel state information (CSI) report responsive to the sensing NDP, wherein the CSI report comprises receiver frequency response information determined by performing a channel estimation operation;
• and
• performing a wireless sensing operation according to the frequency response information, wherein the frequency response information pertains to a frequency response of the sensing responder, and the performing a wireless sensing operation comprises indicating the frequency response variation of the sensing responder, wherein the CSI report comprises at least one of:
• a receiver operating point (OP) gain type subfield;
• and a receiver OP gain index subfield, and wherein the receiver OP gain index is a segregated index comprising a plurality of receiver OP gain index values corresponding to different receiver antennas.

A method of wireless sensing performed over a wireless network, the method comprising:

• transmitting, by a sensing initiator, a sensing null data packet (NDP);
• receiving, from a sensing responder, a channel state information (CSI) report responsive to the sensing NDP, wherein the CSI report comprises receiver frequency response information determined by performing a channel estimation operation;
• and
• performing a wireless sensing operation according to the frequency response information;
• and
• receiving another CSI report from the sensing responder, and comparing the CSI report to the another CSI report to detect small changes in frequency response using a same receiver configuration,
• wherein the frequency response information pertains to a frequency response of the sensing responder, and the performing a wireless sensing operation comprises indicating the frequency response variation of the sensing responder, and
• wherein the CSI report comprises at least one of:
• a receiver operating point (OP) gain type subfield;
• and a receiver OP gain index subfield.

A method of wireless sensing performed over a wireless network, the method comprising:

• transmitting, by a sensing initiator, a sensing null data packet (NDP);
• receiving, from a sensing responder, a channel state information (CSI) report responsive to the sensing NDP, wherein the CSI report comprises receiver frequency response information determined by performing a channel estimation operation;
• performing a wireless sensing operation according to the frequency response information, wherein the frequency response information pertains to a frequency response of the sensing responder, and the performing a wireless sensing operation comprises indicating the frequency response variation of the sensing responder, and wherein the CSI report comprises at least one of:
• a receiver operating point (OP) gain type subfield;
• and a receiver OP gain index subfield;
• and
• receiving another CSI report from the sensing responder device, and combining the CSI report to the another CSI report to more effectively detect small changes in frequency response using a same receiver configuration.

A transmitter apparatus for performing wireless sensing, the apparatus comprising:

• a processor;
• a memory coupled to the processor and operable to store data;
• and
• a radio under control of said processor and operable to perform wireless sensing, and wherein the processor is operable to cause the radio to:
• transmit a sensing null data packet (NDP);
• receive a channel state information (CSI) report responsive to the sensing NDP, wherein the CSI report comprises receiver frequency response information;
• and
• perform a wireless sensing operation according to the frequency response information,
• wherein the CSI report comprises a receiver operating point (OP) gain type subfield;
• and a receiver OP gain index subfield, and
• wherein the receiver OP gain type subfield is a 2-bit subfield comprising at least one of:
• a value of 0 indicating that neither a receiver OP index nor a gain index are reported, and that values of the receiver OP gain index subfield are reserved;
• a value of 1 indicating that a receiver OP index is reported in the binary receiver OP gain index subfield, wherein the receiver OP index comprises different frequency response categories;
• a value of 2 indicating that a receiver gain index is reported in the receiver OP gain index subfield, wherein the receiver gain index comprises different gain values associated with different frequency response variations;
• and a value of 3 is reserved.

A transmitter apparatus for performing wireless sensing, the apparatus comprising:

• a processor;
• a memory coupled to the processor and operable to store data;
• and
• a radio under control of said processor and operable to perform wireless sensing, and wherein the processor is operable to cause the radio to:
• transmit a sensing null data packet (NDP);
• receive a channel state information (CSI) report responsive to the sensing NDP, wherein the CSI report comprises receiver frequency response information;
• and
• perform a wireless sensing operation according to the frequency response information, wherein the CSI report comprises a receiver operating point (OP) gain type subfield;
• and a receiver OP gain index subfield, and wherein the receiver OP gain index is a segregated index comprising:
• different receiver OP gain index values corresponding to different receiver antennas;
• and
• a number of padding bits (Npad) between the different receiver OP gain index values according to the equation:
• N
• pad
• =
• ⌈
• m
• 8
• ⌉
• ×
• 8
• -
• m
• ,
• 0
• ≤
• N
• pad
• ≤
• 7
• ,
• wherein m represents a number of bits per subfield.