Uplink null data packet format for passive location

Abstract

This disclosure describes systems, methods, and devices related to uplink (UL) null data packet (NDP) format for passive location. A device may cause to send a trigger frame that solicits poll response to one or more anchor stations involved in a passive ranging measurement. The device may identify one or more polling response frames received from the one or more anchor stations. The device may cause to send a trigger frame that solicits uplink null data packet (NDP) to the one or more anchor stations, wherein the uplink NDP comprises an indication of a high efficiency (HE) single user (SU) frame type. The device may identify one or more uplink NDPs received from the one or more anchor stations

What is claimed is: 
     
         1 . A device, the device comprising processing circuitry coupled to storage, the processing circuitry configured to:
 cause to send a trigger frame that solicits poll response to one or more anchor stations involved in a passive ranging measurement;   identify one or more polling response frames received from the one or more anchor stations;   cause to send a trigger frame that solicits uplink null data packet (NDP) to one or more anchor stations, wherein the uplink NDP comprises an indication of an high efficiency (HE) single user (SU) frame type; and   identify one or more uplink NDPs received from the one or more anchor stations.   
     
     
         2 . The device of  claim 1 , wherein the trigger frame that solicits uplink null data packet (NDP) triggers a first anchor station of the one or more anchor stations to send uplink NDP. 
     
     
         3 . The device of  claim 1 , wherein the one or more uplink NDPs are high-efficiency sounding NDP physical layer convergence protocol data units (PPDUs) associated with the SU frame type. 
     
     
         4 . The device of  claim 1 , wherein the SU frame type indicates to a passive client device a capability to decode the uplink NDP. 
     
     
         5 . The device of  claim 4 , wherein timing information associated with uplink NDP is used to assist the passive client device to determine its location. 
     
     
         6 . The device of  claim 3 , wherein a first high-efficiency sounding NDP physical layer convergence protocol data unit (PPDU) comprises a high-efficiency signal A (HE-SIG-A) field. 
     
     
         7 . The device of  claim 6 , wherein the HE-SIG-A field is set by the trigger frame that solicits the UL NDP. 
     
     
         8 . The device of  claim 6 , wherein the HE-SIG-A field is included in a common information field of the trigger frame that solicits the UL NDP. 
     
     
         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 an antenna coupled to the transceiver to cause to send the trigger frame that solicits poll response. 
     
     
         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 a trigger frame that solicits poll response to one or more anchor stations involved in a passive ranging measurement;   identifying one or more polling response frames received from the one or more anchor stations;   causing to send a trigger frame that solicits uplink null data packet (NDP) to one or more anchor stations, wherein the uplink NDP comprises an indication of an high efficiency (HE) single user (SU) frame type; and   identifying one or more uplink NDPs received from the one or more anchor stations.   
     
     
         12 . The non-transitory computer-readable medium of  claim 11 , wherein the trigger frame that solicits UL NDP triggers a first anchor station of the one or more anchor stations to send uplink NDP. 
     
     
         13 . The non-transitory computer-readable medium of  claim 11 , wherein the one or more uplink NDPs are high-efficiency sounding NDP physical layer convergence protocol data units (PPDUs) associated with the SU frame type. 
     
     
         14 . The non-transitory computer-readable medium of  claim 11 , wherein the SU frame type indicates to a passive client device a capability to decode the uplink NDP. 
     
     
         15 . The non-transitory computer-readable medium of  claim 14 , wherein timing information of uplink NDP is used to assist the passive client device to determine its location. 
     
     
         16 . The non-transitory computer-readable medium of  claim 13 , wherein a first high -efficiency sounding NDP physical layer convergence protocol data unit (PPDU) comprises a high-efficiency signal A (HE-SIG-A) field. 
     
     
         17 . The non-transitory computer-readable medium of  claim 16 , wherein the HE-SIG-A field is set by the trigger frame that solicits the UL NDP. 
     
     
         18 . The non-transitory computer-readable medium of  claim 16 , wherein the HE-SIG-A field is included in a common information field of the trigger frame that solicits the UL NDP. 
     
     
         19 . A method comprising:
 causing to send a trigger frame that solicits poll response to one or more anchor stations involved in a ranging determination;   identifying one or more polling response frames received from the one or more anchor stations;   causing to send a trigger frame that solicits uplink null data packet (NDP) to one or more anchor stations, wherein the uplink NDP comprises an indication of a high efficiency (HE) single user (SU) frame type; and   identifying one or more uplink NDPs received from the one or more anchor stations.   
     
     
         20 . The method of  claim 19 , wherein the trigger frame that solicits uplink NDP triggers a first anchor station of the one or more anchor stations to send uplink NDP.