Enhanced wi-fi sensing measurement setup and sensing trigger frame for responder-to-responder sensing

An access point device for initiating a responder-to-responder Wi-Fi sensing between station devices, the access point device comprising processing circuitry coupled to memory, the processing circuitry configured to:

• cause to send, during a polling phase of responder-to-responder Wi-Fi sensing, a sensing polling trigger frame to Wi-Fi sensing responder station devices comprising a first station device and a second station device;
• identify a first clear-to-send received, during the polling phase, from the first station device based on the sensing polling trigger frame;
• identify a second clear-to-send received, during the polling phase, from the second station device based on the sensing polling trigger frame;
• cause to send, during a trigger frame sounding phase of the responder-to-responder Wi-Fi sensing, a sensing responder-to-responder sounding trigger frame to the first station device and the second station device, the sensing responder-to-responder sounding trigger frame associated with causing the first station device to send a responder-to-responder null data packet (NDP) to the second station device;
• cause to send, during a reporting phase of the responder-to-responder Wi-Fi sensing, a sensing report trigger frame to the second station device;
• and
• identify, during the reporting phase, a sensing measurement report from the second station device based on the sensing report trigger frame, wherein the sensing measurement report is indicative of measurements of the responder-to-responder NDP.