Methods and systems for Wi-Fi sensing announcement
A procedure and frame structure for Wi-Fi sensing is described. An aspect of the disclosure provides a method of sensing. Such a method includes sending, by an initiating station (STA) to one or more responder STAs, a sensing request comprising a sensing announcement frame (SAF) indicating sensing set-up information including frame structure information. The SAF includes at least one field indicating the frame structure information including one or more of: a sensing set-up identifier (ID), an SAF version ID, a sensing session ID, a measurement set-up ID, and a measurement instance ID. The method further includes receiving, by the initiating STA from the one or more responder STAs, one or more responses based on the sensing request.
1. A method of sensing for a communication system which utilizes a plurality of spatial streams (SS) for transmission which are received in a plurality of receive (RX) chains, the method comprising:
receiving, by a responder station (STA) from an initiating STA, a sensing request; and
sending, by the responder STA to the initiating STA, one or more responses based on the sensing request, the response including a channel state information (CSI) feedback frame, the CSI feedback frame including:
a CSI coefficient; and
a scale ratio;
wherein the scale ratio is computed per spatial stream (SS)-RX chain pair and wherein the CSI coefficient is computed per spatial stream (SS)-RX chain pair and per sub-carrier.
2. The method of claim 1 wherein the scale ratio defines the range of CSI coefficient for quantization purposes.
3. The method of claim 1 further comprising:
receiving, by the responder station (STA) from the initiating STA, a sensing announcement frame (SAF) indicating sensing set-up information including frame structure information, wherein the SAF includes at least one field indicating the frame structure information including one or more of: a sensing set-up identifier (ID), an SAF version ID, a sensing session ID, a measurement set-up ID, and a measurement instance ID.
4. The method of claim 3 , wherein the at least one field includes a first field and a second field, wherein: the first field indicates the sensing session ID, and the second field indicates one or more of: the sensing set-up identifier (ID), the SAF version ID, the measurement set-up ID, and the measurement instance ID.
5. The method of claim 3 , wherein one or more fields of the at least one field is repeated.
6. The method of claim 3 wherein the at least one field further indicates a preamble puncturing pattern indicating availability or nonavailability of bandwidth.
7. A wireless station (STA) for a communication system which utilizes a plurality of spatial streams (SS) for transmission which are received in a plurality of receive (RX) chains, the STA comprising:
at least one processor; and
machine readable memory storing machine readable instructions, which when executed by the STA, configures the STA for:
receiving, from an initiating STA, a sensing request; and
sending, by the STA to the initiating STA, one or more responses based on the sensing request, the response including a channel state information (CSI) feedback frame, the CSI feedback frame including:
a CSI coefficient; and
a scale ratio;
wherein the scale ratio is computed per spatial stream (SS)-RX chain pair and wherein the CSI coefficient is computed per spatial stream (SS)-RX chain pair and per sub-carrier.
8. The STA of claim 7 wherein the scale ratio defines the range of CSI coefficient for quantization purposes.
9. The STA of claim 7 wherein the machine readable instructions, which when executed by the STA, further configures the STA for:
receiving, from the initiating STA, a sensing announcement frame (SAF) indicating sensing set-up information including frame structure information, wherein the SAF includes at least one field indicating the frame structure information including one or more of: a sensing set-up identifier (ID), an SAF version ID, a sensing session ID, a measurement set-up ID, and a measurement instance ID; and
sending, to the initiating STA, one or more responses based on the sensing request.
10. The STA of claim 7 wherein the at least one field includes a first field and a second field, wherein: the first field indicates the sensing session ID, and the second field indicates one or more of: the sensing set-up identifier (ID), the SAF version ID, the measurement set-up ID, and the measurement instance ID.
11. The STA of claim 7 wherein one or more fields of the at least one field is repeated.
12. The STA of claim 7 wherein the at least one field further indicates a preamble puncturing pattern indicating availability or nonavailability of bandwidth.