PATENT CLAIM ANALYSIS

Application Number: 16071336
Application Type: Utility
Filing Date: 2018-07
Publication Date: 2019-06
Patent Classification: ["340", "573100"]

Abstract:
The present invention relates to a fall detection method and system. The fall detection method comprises: receiving, by a first receiving antenna, a first WiFi signal stream propagating through an environment; receiving, by a second receiving antenna, a second WiFi signal stream propagating through the environment; determining a physical layer Channel State Information (CSI) stream, namely, a first CSI stream, of the first WiFi signal stream; determining a physical layer CSI stream, namely, a second CSI stream, of the second WiFi signal; determining a phase difference, namely, a CSI phase difference, between respective phase of the physical layer CSI stream of the first WiFi signal stream and the physical layer CSI stream of the second WiFi signal stream at the same time point, to form a CSI phase difference stream; and determining, according to the CSI streams and the CSI phase difference stream, a fall event.

Claim (Index 16):
The fall detection system according to  claim 15 , wherein the Channel State Information processing module further comprises an interpolation module and a filter module, wherein:\n the interpolation module is configured to interpolate in the first CSI stream to obtain an interpolated first CSI stream with a continuous time-frequency domain spectrum, and interpolate in the second CSI stream to obtain an interpolated second CSI stream with a continuous time-frequency domain spectrum; the filter module is configured to remove uncorrelated signal frequency components from the interpolated first CSI stream and the interpolated second CSI stream to obtain a first filtered CSI stream and a second filtered CSI stream, respectively; the Channel State Information processing module is further configured to determine a raw phase difference signal between a respective phase of the raw first CSI stream and the second CSI stream at the same time point, and a band-pass filtered phase difference signal between respective phase of the first filtered CSI stream and the second filtered CSI stream at the same time point; the activity segmentation module is further configured to identify the finishing reference point of fall or fall-like activities according to the filtered CSI phase difference stream, and determine the starting reference point of fall or fall-like activities according to the trace back window size.

Metadata:
- Claim Count in Document: 3.0
- Percentile: 95.0
- Lexical Diversity: 3.30769
- Patent Class: 340.0
- Transitional Phrase Type: none
- Component Type: 0
- Foreign Priority: True
- Related Applications: ['16060710', '15611545', '15760230', '13856134', '10985400']

Analysis Scores:
- 35 USC 101 Eligibility (BERT): 0.6264395394237569
- 35 USC 102 Novelty (BERT): 0.4955463557596273
- Combined Prediction Score: 0.6133502210573439
- Mean Citation Score: 147.68193399999996
- Max Citation Score: 162.82071000000005
- Similarity Product: 113.1433117131919

Labels:
- Claim Label 101: 1
- Claim Label 102: 1
- Claim Label 103: 1
- Claim Label 112: 1
- Combined Label: 1
- Label 101 Adjusted: 1

Dataset: test