Enhancing positioning via measurement batching

Abstract

Example methods, apparatuses, and/or articles of manufacture are disclosed herein that may be utilized, in whole or in part, to facilitate and/or support one or more operations and/or techniques for enhancing positioning, which may include E911 positioning, via measurement batching, such as for use in or with mobile communication devices, for example.

1 . A method, at a mobile device, comprising:
 storing observations of radio frequency (RF) signals transmitted from one or more wireless transmitters in an area, the observations being stored based, at least in part, on one or more associations between the observations and one or more sensor measurements obtained from one or more on-board sensors; and   processing the observations to obtain an estimate of a location of the mobile device based, at least in part, on the one or more associations and responsive to a request for the estimate occurring subsequent to the storing the observations.   
     
     
         2 . The method of  claim 1 , wherein the observations are processed based, at least in part, on positioning assistance data obtained subsequent to the storing the observations. 
     
     
         3 . The method of  claim 2 , wherein the positioning assistance data comprises one or more positioning tiles covering at least a portion of the area. 
     
     
         4 . The method of  claim 1 , wherein the one or more associations comprise at least one of: a time-related association; a location-related association; a parameter-related association, or any combination thereof. 
     
     
         5 . The method of  claim 1 , wherein the observations are stored in one or more measurement batches in a local memory of the mobile device. 
     
     
         6 . The method of  claim 5 , wherein the processing further comprises accessing the local memory to retrieve at least one of the one or more measurement batches via correlating the observations with one or more subsequent observations of the one or more wireless transmitters in the area. 
     
     
         7 . The method of  claim 6 , wherein the one or more subsequent observations comprise observations obtained subsequent to the request for the estimate of the location of the mobile device. 
     
     
         8 . The method of  claim 5 , wherein a particular measurement batch of the one or more measurement batches is stored with reference to at least one of: a particular location within the area; a particular time period for observing the RF signals; a particular parameter of the RF signals, or any combination thereof. 
     
     
         9 . The method of  claim 1 , wherein the request for the estimate of the location comprises a message initiating a positioning session for the mobile device. 
     
     
         10 . The method of  claim 9 , wherein the message is indicative of an emergency event comprising a 911 call originating from the mobile device. 
     
     
         11 . The method of  claim 1 , wherein the area comprises a satellite positioning system (SPS)-denied environment. 
     
     
         12 . The method of  claim 1 , wherein the observations comprise at least one of: time-stamped observations; geo-tagged observations, or any combination thereof. 
     
     
         13 . The method of  claim 1 , wherein the observations comprise at least one of: a measured time of arrival (TOA) of the RF signals; a measured time difference of arrival (TDOA) of the RF signals; a received signal strength indicator (RSSI) measurement of the RF signals; a round-trip time (RTT) measurement of the RF signals; an identity of the one or more wireless transmitters, or any combination thereof. 
     
     
         14 . The method of  claim 1 , wherein the one or more wireless transmitters comprise at least one of: a Wi-Fi access point; a cellular base station; a femtocell; a picocell, or any combination thereof. 
     
     
         15 . The method of  claim 1 , wherein the observations are obtained via a scan of the area. 
     
     
         16 . The method of  claim 1 , wherein the processing further comprises de-weighting the observations based, at least in part, on an age of the observations. 
     
     
         17 . The method of  claim 1 , and further comprising estimating the location of the mobile device in the area based, at least in part, on a location of at least one of the one or more wireless transmitters determined based, at least in part, on the one or more associations and one or more subsequent observations of the RF signals in the area. 
     
     
         18 . The method of  claim 1 , and further comprising:
 associating the one or more sensor measurements with the observations based, at least in part, on at least one of: a particular location within the area; a particular time period for observing the RF signals; a particular parameter of the RF signals, or any combination thereof.   
     
     
         19 . An apparatus comprising:
 a communication interface coupled to a receiver of a mobile device to communicate with an electronic communications network and one or more processors coupled to a memory and to the communication interface, the communication interface and the one or more processors configured to:
 store observations of radio frequency (RF) signals transmitted from one or more wireless transmitters in an area, the observations being stored based, at least in part, on one or more associations between the observations and one or more sensor measurements obtained from one or more on-board sensors; and 
 process the observations to obtain an estimate of a location of the mobile device based, at least in part, on the one or more associations and responsive to a request for the estimate occurring subsequent to the storing the observations. 
   
     
     
         20 . The apparatus of  claim 19 , wherein the one or more processors are further configured to process the observations based, at least in part, on positioning assistance data obtained subsequent to the storing the observations. 
     
     
         21 . The apparatus of  claim 20 , wherein the positioning assistance data comprises one or more positioning tiles covering at least a portion of the area. 
     
     
         22 . The apparatus of  claim 19 , wherein the one or more associations comprise at least one of: a time-related association; a location-related association; a parameter-related association, or any combination thereof. 
     
     
         23 . The apparatus of  claim 19 , wherein the observations are stored in one or more measurement batches in a local memory of the mobile device. 
     
     
         24 . The apparatus of  claim 23 , wherein the one or more processors are further configured to access the local memory to retrieve at least one of the one or more measurement batches via correlating the observations with one or more subsequent observations of the one or more wireless transmitters in the area. 
     
     
         25 . The apparatus of  claim 23 , wherein a particular measurement batch of the one or more measurement batches is stored with reference to at least one of: a particular location within the area; a particular time period for observing the RF signals; a particular parameter of the RF signals, or any combination thereof. 
     
     
         26 . The apparatus of  claim 19 , wherein the observations comprise at least one of: time-stamped observations; geo-tagged observations, or any combination thereof. 
     
     
         27 . The apparatus of  claim 19 , wherein the one or more processors further configured to de-weight the observations based, at least in part, on an age of the observations. 
     
     
         28 . The apparatus of  claim 19 , wherein the one or more processors further configured to estimate the location of the mobile device in the area based, at least in part, on a location of at least one of the one or more wireless transmitters determined based, at least in part, on the one or more associations and one or more subsequent observations of the RF signals in the area. 
     
     
         29 . The apparatus of  claim 19 , wherein the one or more processors further configured to:
 associate the one or more sensor measurements with the observations based, at least in part, on at least one of: a particular location within the area; a particular time period for observing the RF signals; a particular parameter of the RF signals, or any combination thereof.   
     
     
         30 . A non-transitory storage medium having instructions executable by a processor to:
 store observations of radio frequency (RF) signals transmitted from one or more wireless transmitters in an area, the observations being stored based, at least in part, on one or more associations between the observations and one or more sensor measurements obtained from one or more on-board sensors; and   process the observations to obtain an estimate of a location of a mobile device based, at least in part, on the one or more associations and responsive to a request for the estimate occurring subsequent to the storing the observations.