ENHANCED FINE TIMING MEASUREMENT PROTOCOL NEGOTIATION

1 . A device, the device comprising memory and processing circuitry configured to:

identify an enhanced fine timing measurement request received from a first device, the enhanced fine timing measurement request comprising one or more information elements associated with one or more multiple-input multiple-output (MIMO) parameters;

cause to send an enhanced fine timing measurement response to the first device;

identify a null data packet announcement associated with a location determination of the first device;

identify a null data packet received from the first device based on receiving the null data packet announcement; and

cause to send a null data packet feedback to the first device.

2 . The device of claim 1 , wherein the null data packet announcement and the null data packet feedback are control frames and the null data packet is a physical layer (PHY) convergence protocol data unit (PPDU) received based on the fine time measurement response.

3 . The device of claim 1 , wherein the one or more MIMO parameters include at least one of a number of supported transmit chains, a number of supported receive chains, a supported bandwidth, or a legacy compatibility.

4 . The device of claim 1 , wherein the processing circuitry are further configured to:

allocate a pre-association identification (pre-AID) to the first device; and

cause to start a pre-AID allocation timer.

5 . The device of claim 4 , wherein the processing circuitry are further configured to cause to maintain the pre-AID allocation to the first device before expiration of the pre-AID allocation timer.

6 . The device of claim 4 , wherein the pre-AID allocation timer is associated with a time the enhanced fine timing measurement response is sent to the first device.

7 . The device of claim 2 , wherein the processing circuitry are further configured to determine a location of the device based at least in part on measurements of null data packet announcement, the null data packet feedback and null data packet and a location configuration information (LCI) extracted from the fine timing measurement response.

8 . The device of claim 2 , wherein the null data packet announcement includes an indication of location.

9 . The device of claim 1 , further comprising a transceiver configured to transmit and receive wireless signals.

10 . The device of claim 9 , further comprising one or more antennas coupled to the transceiver.

11 . A non-transitory computer-readable medium storing computer-executable instructions which when executed by one or more processors result in performing operations comprising:

causing to send an enhanced fine timing measurement request to a device, the enhanced fine timing measurement request comprising one or more information elements associated with multiple-input multiple-output (MIMO) parameters;

identifying an enhanced fine timing measurement response from the device;

causing to send a null data packet announcement associated with a location determination;

causing to send a null data packet to the device; and

identifying a null data packet feedback from the device.

12 . The non-transitory computer-readable medium of claim 11 , wherein the one or more MIMO parameters include at least one of a number of supported transmit chains, a number of supported receive chains, supported bandwidths, or legacy capabilities.

13 . The non-transitory computer-readable medium of claim 11 , wherein the operations further comprise identifying an unassociated identification (pre-AID) allocated by the device and included in the enhanced fine timing measurement response.

14 . The non-transitory computer-readable medium of claim 11 , wherein the null data packet announcement and the null data packet feedback are control frames and the null data packet is a physical layer (PHY) convergence protocol data unit (PPDU) received based on the fine time measurement response.

15 . The non-transitory computer-readable medium of claim 14 , wherein the operations further comprise determining a location of the device based at least in part on measurements of null data packet announcement, the null data packet feedback and null data packet and a location configuration information (LCI) extracted from the fine timing measurement response.

16 . The non-transitory computer-readable medium of claim 14 , wherein the null data packet announcement includes an indication of location.

17 . A method comprising:

identifying, by one or more processors, an enhanced fine timing measurement request received from a first device, the enhanced fine timing measurement request comprising one or more information elements associated with one or more multiple-input multiple-output (MIMO) parameters;

cause to send an enhanced fine timing measurement response to the first device;

identify a null data packet announcement associated with a location determination of the first device;

identify a null data packet received from the first device based on receiving the null data packet announcement; and

cause to send a null data packet feedback to the first device.

18 . The method of claim 17 , wherein the null data packet announcement and the null data packet feedback are control frames and the null data packet is a physical layer (PHY) convergence protocol data unit (PPDU) received based on the fine time measurement response.

19 . The method of claim 17 , wherein the one or more MIMO parameters include at least one of a number of supported transmit chains, a number of supported receive chains, supported bandwidths, or legacy capabilities.

20 . The method of claim 17 , further comprising:

allocating an unassociated identification (PRE-AID) to the first device; and

causing to start a PRE-AID allocation timer.