wifi positioning system Time-of-Flight WifiManager SystemService signal quality android developer algorithm stream ap device identity protocol dhcp arp indoor positioning system IPS real-time location system RTLS RSSI

 https://www.inpixon.com/technology/standards/wifi

 Wi-Fi indoor positioning and navigation: a cloudlet-based cloud computing approach

https://hcis-journal.springeropen.com/articles/10.1186/s13673-020-00236-8 

https://jit.ndhu.edu.tw/article/view/1704

https://www.researchgate.net/figure/Trilateration-algorithm-for-object-localization-using-three-beacons-B-1-B-2-and-B-3_fig1_338241733

https://www.101computing.net/cell-phone-trilateration-algorithm/

ultra-wideband uwb

IEEE standard 802.15.4  iot

wifi bluetooth 

indoor position

4g lte cat1 positioning  sms ss7

Positioning Techniques for 5G NR in 3GPP Release-16

PositionLocationMonitoring.pdf - NXP
https://www.nxp.com › docs 
A location monitoring system can be developed with moderate performance with a ZigBee mesh network that uses low-cost IEEE 802.15.4 embedded devices.

Application of IEEE Std 802.15.4
https://mentor.ieee.org › dcn › 15-14-0226-00-0000-802-...
2014年5月1日 — This document describes ways in which IEEE Std 802.15.4 can be used to satisfy ... identification, location, and tracking described in 3.5.