PATENT CLAIM ANALYSIS

Application Number: 16042252
Application Type: Utility
Filing Date: 2018-07
Publication Date: 2020-01
Patent Classification: ["340", "005610"]

Abstract:
A method is provided for authenticating a transceiver in a keyless entry system for a vehicle. The method uses a collision avoidance radar system on the vehicle for authenticating a key fob radar transceiver. A lower power radar signal is transmitted from the vehicle. The lower power radar signal is transmitted below an ambient noise level to make the radar signal difficult for an attacker to detect. The key fob transceiver is then authenticated as being a legitimate transceiver for accessing the vehicle using the low power radar signal. A distance bounding scheme may be used to determine if the key fob is within a predetermined distance. Challenge/response communications may be used to authenticate that the key fob is the legitimate key fob.

Claim (Index 16):
A method for authenticating a transceiver in a keyless entry system for a vehicle, the method comprising:\n attenuating a 77 GHz collision avoidance radar signal generated on the vehicle to produce a low power radar signal having a power level below an ambient noise level, wherein attenuating a collision avoidance radar signal comprises switching off a power amplifier used to amplify the collision avoidance radar signal for transmission; transmitting the low power radar signal from the vehicle in response to a signal received from the transceiver; using the low power radar signal, authenticating that the transceiver is a legitimate transceiver for accessing the vehicle using the low power radar signal to determine that a distance between the vehicle and the transceiver is less than predetermined distance; and authenticating that the transceiver is a legitimate transceiver using the low power radar signal to communicate with the transceiver using spread spectrum challenge/response messages.

Metadata:
- Claim Count in Document: 46.0
- Percentile: 95.0
- Lexical Diversity: 2.16667
- Patent Class: 340.0
- Transitional Phrase Type: open
- Component Type: 1
- Foreign Priority: False
- Related Applications: ['14913623', '14614038', '14395022', '15883129', '13834878']

Analysis Scores:
- 35 USC 101 Eligibility (BERT): 0.6566188570698551
- 35 USC 102 Novelty (BERT): 0.4879773625991381
- Combined Prediction Score: 0.6397547076227834
- Mean Citation Score: 149.033424
- Max Citation Score: 157.92047
- Similarity Product: 106.60766154874682

Labels:
- Claim Label 101: 1
- Claim Label 102: 0
- Claim Label 103: 1
- Claim Label 112: 1
- Combined Label: 0
- Label 101 Adjusted: 1

Dataset: test