UWB Ranging Integrity Checking Against Early Path Insertion
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Solution Overview
Problem
Existing ultra-wideband (UWB) ranging technologies in wireless communication systems face challenges in securing ranging operations from malicious attacks and ensuring accurate distance measurement.
Innovation Solution
The proposed solution involves an electronic device that uses a method of operating by transmitting and receiving frames for ranging, obtaining ranging values, and performing integrity checking by comparing these values. This approach includes using a scrambled timestamp sequence (STS) and a preamble to enhance security and accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If UWB ranging is performed using traditional methods, then distance measurement can be achieved, but the system is vulnerable to malicious attacks and early path insertion attacks
Solution Approach 1:
The patent applies preliminary action by performing integrity checking of ranging values before final distance measurement is accepted. The receiving device checks whether the ranging value satisfies a predetermined condition (integrity check) before completing the ranging operation, thereby preventing malicious attacks in advance
Solution Approach 2:
The patent introduces an intermediary integrity checking mechanism that mediates between the transmission of ranging values and the final distance measurement. This intermediary step verifies the authenticity of ranging values exchanged between devices, blocking malicious access without disrupting normal ranging operations
2Measurement precision
If traditional ranging methods are used, then ranging operation can be performed, but accuracy of distance measurement is compromised
Solution Approach 1:
The patent implements feedback by having the receiving device send back an integrity check result to the transmitting device. Based on this feedback, the system can determine whether to accept or reject the ranging value, thereby ensuring measurement accuracy through continuous verification
Solution Approach 2:
The integrity checking is performed as a preliminary action before finalizing the ranging result. By verifying the ranging value against predetermined conditions in advance, the system ensures that only accurate and authentic measurements are accepted
Data Source
AI summary
Provided is a secure ranging method capable of blocking access of a malicious user by preventing an attack by the malicious user when ranging is performed using an ultra-wideband (UWB). Also, provided is a method of increasing accuracy of ranging. A method of operating an electronic device for performing ranging by using a UWB in a wireless communication system includes: transmitting and receiving at least one frame for ranging, to and from at least one other electronic device; obtaining a first ranging value and a second ranging value, based on the at least one frame; and performing integrity checking, based on a result of comparing the first ranging value with the second ranging value.