Enhanced fine timing measurement protocol negotiation

Abstract

This disclosure describes systems, methods, and devices related to enhanced fine timing measurement protocol negotiation. A device may 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. The device may cause to send an enhanced fine timing measurement response to the first device. The device may identify a null data packet announcement associated with a location determination of the first device. The device may identify a null data packet received from the first device. The device may cause to send a null data packet feedback to the first device.

What is claimed is: 
     
         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.