Dynamic Carrier Frequency Allocation for LoRaWAN DutyCycle Compliance
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Solution Overview
Problem
Existing wide area communication networks, such as LoRaWAN, face challenges in managing carrier frequency allocation due to devices not complying with quality parameters like DutyCycle, leading to potential network congestion and interference, and existing mechanisms may restrict devices from meeting application-specific message frequency requirements.
Innovation Solution
A method where a server dynamically allocates 'verbal' carrier frequencies to devices non-compliant with quality parameters, allowing them to switch to these frequencies without adhering to strict DutyCycle constraints, thereby preserving 'non-verbal' frequencies and ensuring network quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a DutyCycle parameter is imposed on electronic devices to prevent network congestion, then network interference is reduced, but devices cannot meet application-specific message frequency requirements
Solution Approach 1:
The patent segments the carrier frequency list into two distinct categories: 'verbal' frequencies (designated for non-compliant devices) and 'non-verbal' frequencies (designated for compliant devices). This segmentation allows the network to differentiate between devices based on their compliance status and route them to appropriate frequency resources, thereby maintaining network quality while accommodating diverse application needs.
Solution Approach 2:
The patent applies local quality by assigning different quality characteristics to different frequency resources. 'Non-verbal' frequencies are reserved with strict quality controls for compliant devices, while 'verbal' frequencies are designated with more flexible constraints for non-compliant devices. This localized quality differentiation enables simultaneous support for both strict and flexible communication requirements within the same network.
2Adaptability or versatility
If carrier frequencies are allocated to devices without compliance verification, then device adaptability is improved, but network congestion and interference increase
Solution Approach 1:
The patent implements a feedback mechanism where the network server monitors device compliance status with DutyCycle parameters. Based on this feedback, the server dynamically adjusts frequency allocations by transitioning devices between 'verbal' and 'non-verbal' frequency lists. This closed-loop control enables the network to respond to actual device behavior, maintaining flexibility while preventing congestion through adaptive resource management.
3Ease of operation
If a maximum DutyCycle value is limited for all sub-bands, then device operation simplicity is improved, but carrier frequency utilization efficiency decreases
Solution Approach 1:
The patent creates a universal frequency management system where a single framework supports both simplified operation and efficient utilization. The 'verbal' frequency list provides a universal solution for non-compliant devices with relaxed constraints, while the 'non-verbal' list serves compliant devices with optimized constraints. This multi-functional approach allows the network to handle diverse device requirements uniformly without sacrificing either operational simplicity or frequency utilization efficiency.
Data Source
AI summary
A method for managing the allocation, by a server of a wide area communication network, of a first list of carrier frequencies that can be used by an electronic device for sending messages, the method including determining a second list of carrier frequencies, receiving a first message from the electronic device via a first carrier frequency not included in the second list, determining the value of a quality parameter associated with the first message received, when this value exceeds the value of a first threshold; determining a first sub-list of the second list, including at least one second carrier frequency not included in the first list, determining a second sub-list of the first list, including at least a third frequency not included in the second list, and sending to the electronic device a second message to replace the carrier frequencies of the second sub-list with those of the first sub-list.