UWB Ranging Factor Definition Using Device-Specific Nonces
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Solution Overview
Problem
Existing UWB technologies face challenges such as signal interference, inefficient power consumption, and inaccurate positioning due to environmental factors, and require pre-exchange of keys using communication means like NFC and BLE, which have limitations.
Innovation Solution
A UWB system with a processor that predefines UWB ranging factors, including scrambled timestamp sequences and encryption keys, using unique device characteristics and dynamic nonce generation to enhance communication efficiency and accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If pre-exchange of keys using NFC and BLE is used, then UWB ranging factors can be exchanged, but communication restrictions and pre-handshaking requirements occur
Solution Approach 1:
The patent extracts the key exchange function from the UWB communication protocol itself and separates it into a pre-handshaking phase using NFC/BLE. This allows the UWB ranging factors to be exchanged through alternative communication means, reducing the complexity and restrictions of the overall communication system while maintaining security.
Solution Approach 2:
The patent introduces NFC and BLE as intermediary communication channels for exchanging UWB ranging factors. These intermediary technologies serve as mediators between devices, enabling secure key exchange without requiring direct UWB communication setup, thus simplifying the overall communication architecture.
2Adaptability or versatility
If UWB ranging factors are exchanged through pre-handshaking, then key distribution is enabled, but communication means restrictions apply
Solution Approach 1:
The patent implements multi-functionality by enabling UWB ranging factor exchange through multiple communication channels (NFC, BLE, and potentially other means). This universal approach allows the system to adapt to different communication scenarios and device capabilities, ensuring that key exchange can occur regardless of which specific communication technology is available.
3Measurement precision
If dynamic nonce generation using device characteristics is implemented, then positioning accuracy improves, but computational complexity increases
Solution Approach 1:
The patent implements self-service by having each device generate its own nonce using its unique characteristics (such as device ID, hardware fingerprints, or other inherent properties). This eliminates the need for centralized nonce distribution or complex coordination protocols, reducing communication overhead and computational complexity while maintaining high positioning accuracy through device-specific randomization.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The system reduces signal interference, optimizes power consumption, and improves positioning accuracy by dynamically adjusting communication methods based on device characteristics and environmental conditions.
Implementation Method 1
a processor that generates a random value and derives an encryption key and a nonce using the generated random value
Data Source
AI summary
According to an aspect of the present invention, there is provided an ultra-wideband (UWB) system comprising: a memory in which a UWB ranging factor definition program is embedded; and a processor which executes the program, wherein the processor predefines UWB ranging factors to define a nonce in consideration of a unique key characteristic of an individual device.