Dynamic Relay Assignment for Jamming Mitigation in Tactical Wireless Networks
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Solution Overview
Problem
Existing relay assignment methods in tactical wireless networks like Link-16 fail to maximize communication range under high-power localized jamming interference, as they do not account for the varying jamming effects on different nodes, leading to unreliable communication with disadvantaged nodes.
Innovation Solution
Implement a dynamic relay assignment (DRA) method that assigns conditional relay nodes based on their quality level (QL), calculated from node quality (NQ), relay quality (RQ), number of active relays in range (NAR), and closest node quality factor (CNQF), using local performance statistics and ambient noise measurements, to enhance communication reliability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Length of stationary object
If relay nodes are selected based on highest altitude or geographical coverage, then communication range is extended, but reliability under localized jamming interference deteriorates
Solution Approach 1:
The patent implements dynamic relay assignment where relay node selection changes continuously based on real-time jamming conditions. Instead of static selection based solely on altitude or geography, the system dynamically adjusts which nodes relay traffic depending on localized interference patterns detected through quality metrics, allowing the network to adapt to changing jamming threats while maintaining communication reliability
Solution Approach 2:
The patent introduces quality metrics (NQ, RQ, QL) that assess local communication conditions for each node individually. These metrics evaluate signal quality, interference levels, and transmission success rates specific to each node's local environment, enabling the network to identify and avoid nodes suffering from localized jamming while selecting reliable relays based on actual performance rather than generic geographical characteristics
2Area of stationary object
If conditional relay nodes are selected based on geographical coverage, then network coverage is maximized, but communication with disadvantaged nodes deteriorates under localized interference
Solution Approach 1:
The patent implements a feedback mechanism where nodes continuously monitor communication quality metrics and report their status. The system uses quality measurements (signal strength, interference levels, transmission success) from each node to dynamically adjust relay assignments, ensuring that nodes experiencing localized jamming are not used as relays for disadvantaged nodes, thereby maintaining both coverage and reliability
Solution Approach 2:
The patent changes the selection parameters for relay nodes from static geographical attributes (altitude, position) to dynamic quality-based parameters (NQ, RQ, QL metrics). This parameter transformation allows the system to evaluate nodes based on actual communication performance and interference conditions, enabling reliable communication with disadvantaged nodes even when geographical coverage requirements must be maintained
3Device complexity
If fixed relay assignments are established during network design, then network simplicity is maintained, but adaptability to localized jamming threats deteriorates
Solution Approach 1:
The patent transforms the static relay assignment system into a dynamic one where relay roles are not fixed but continuously reassigned based on real-time conditions. The system maintains operational simplicity by using standardized quality metrics and automated selection algorithms, while gaining adaptability to localized jamming threats through continuous monitoring and dynamic reassignment of relay functions based on detected interference patterns
Data Source
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AI summary
A method for mitigating the effect of a localized jamming attack on a secure, tactical wireless network implements a dynamic relay assignment ("DRA") approach, whereby nodes are dynamically assigned to relay communications to "disadvantaged" nodes that are subject to the attack, the relay nodes being selected based on their communication reliability and their proximity to the disadvantaged nodes. In embodiments, the nodes share with each other performance statistics and, in embodiments, measured local noise levels. In various embodiments, each node provides data to a "strategy optimizer" which then dynamically makes relay assignments. In Link- 16 embodiments support for a "DRA" relay mode is added, and the communication protocol is extended to support the required exchange of communication quality and local noise information via PPLI messages.