Multilayer statistical wireless terminal position determination

By generating and aggregating location probability surfaces and combining them with motion information from wireless terminals, the inaccuracy caused by noise and multipath effects in wireless terminal location estimation is solved, achieving more accurate location determination.

CN113329489BActive Publication Date: 2026-05-01HEWLETT PACKARD ENTERPRISE DEV LP
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Patent Information

Application Number
CN202010606417.8
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Priority Date
2020-02-28
Filing Date
2020-06-29
Publication Date
2026-05-01
Estimated Expiration
2040-06-29

AI Technical Summary

Technical Problem

Existing wireless terminal location estimation methods based on signal strength measurements are susceptible to noise and multipath effects, leading to inaccurate location estimation, especially when relying on triangulation, where collisions are common.

Method used

The Probabilistic Location Surface (LPS) method is adopted. By generating and aggregating signal strength probability surfaces of multiple geographical areas, and combining them with the motion information of the wireless terminal, the location of the wireless terminal is estimated using multiple location probability surfaces and motion probability surfaces. A synthetic location probability surface is generated to improve the accuracy of location estimation.

Benefits of technology

It improves the accuracy and consistency of wireless terminal location estimation, reduces the impact of noise and multipath effects, and provides more reliable location determination.

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Abstract

Embodiments of the present application relate to multilayer statistical wireless terminal position determination. Embodiments are disclosed for determining a position of a wireless terminal. The wireless terminal measures signal strengths of a plurality of wireless transmitters. Based on this information, a plurality of position probability surfaces are generated. Each position probability surface indicates a plurality of probabilities that the wireless terminal is in each geographical region of a corresponding plurality of geographical regions. These probability surfaces are then averaged to determine a composite position probability surface. A motion probability surface is also determined, which stores a plurality of probabilities indicative of changes in motion of the wireless terminal. The composite position probability surface is then updated based on the motion probability surface. A position estimate of the wireless terminal is then determined based on the updated composite position probability surface.
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