RF Fingerprint Conversion Across Dynamic Network Nodes
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Solution Overview
Problem
Existing wireless communication systems face challenges in generating RF fingerprints that are transceiver-specific, limiting their use across different nodes within a network, especially in dynamic network topologies like mesh networks, leading to burdensome management and connectivity delays.
Innovation Solution
A system and method for generating a client-device RF fingerprint at a first node, which can be adapted for global use by any other node within the communication network, using a conversion function to account for differential contribution values between receiving devices, allowing efficient and practical implementation of RF fingerprinting technology.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If transceiver-specific RF fingerprints are generated for each node, then authentication reliability is improved, but device complexity and management burden increase
Solution Approach 1:
The patent generates a single universal RF fingerprint for each client device that can be used by any node in the mesh network. This universal fingerprint is created by combining node-specific fingerprint components with node-independent components, allowing the same fingerprint to authenticate the device across multiple different nodes without requiring node-specific fingerprints for each node-client pair.
2Measurement precision
If node-specific RF fingerprints are maintained for each client device, then authentication precision is improved, but loss of time for connectivity establishment increases
Solution Approach 1:
The patent performs preliminary actions by pre-computing and storing node-independent fingerprint components and conversion functions during network setup. When a client device connects to a new node, the system uses the pre-stored conversion function to quickly transform the universal fingerprint into the node-specific fingerprint, eliminating the need for real-time fingerprint generation and reducing connectivity establishment time.
3Measurement precision
If multiple node-specific fingerprints are generated for dynamic network topologies, then authentication accuracy is improved, but productivity of network operations decreases
Solution Approach 1:
The patent uses a copying approach where a universal RF fingerprint is created once per client device and then copied/adapted to work across multiple different nodes. Instead of generating multiple unique fingerprints for different node-client pairs, the system copies the universal fingerprint and transforms it using node-specific conversion functions, significantly reducing computational overhead and improving network operation efficiency.
Data Source
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AI summary
A computer-implemented method comprising: receiving, by a first radio frequency (RF) receiving device, an RF data transmission from an RF transmitter; analyzing the received RF data transmission to estimate at least one RF feature; constructing, based on the at least one RF feature, an RF fingerprint of the RF transmitter which is specific to the first RF receiving device; and modifying the RF fingerprint to generate a modified RF fingerprint for use by a second RF receiving device, by applying, to the RF fingerprint, a conversion function reflecting a differential between respective contribution values associated with each of the first and second receiving devices.