Frequency Hopping Channel Selection for Spectrum Sharing

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Solution Overview

Problem

The limited availability of frequency resources poses a challenge for new communication services, such as IoT and drones, as existing communication services have already occupied most spectrums, necessitating an efficient method to share spectrum resources.

Innovation Solution

A method of spectrum sharing by frequency hopping, where a second communication system sets a weight-based selection criterion for channels using frequency usage information from a first communication system, allocating channels based on unused and used spectrums to minimize signal collision probability and optimize performance indices like multi-nets and message error rate.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If frequency resources are allocated to new communication services (IoT, drones), then service availability is improved, but spectrum scarcity worsens due to existing services occupying most spectrums

Engineering Contradiction:

Improveservice availabilityVSAvoidspectrum resources

Core Design Contradiction:

Adaptability or versatilityVSQuantity of substance

Solution Approach 1:

The patent merges spectrum resources from different communication systems (first and second systems) by enabling the second system to access unused spectrum channels of the first system through frequency hopping, thereby combining available spectrum resources to serve multiple services

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The patent implements dynamic spectrum allocation where the second communication system dynamically selects frequency channels based on real-time usage information of the first system, allowing flexible adaptation to changing spectrum availability rather than static allocation

Inventive Principle:

Principle #15Dynamics

2Adaptability or versatility

If the second communication system uses frequency hopping channels, then spectrum sharing capability is improved, but signal collision probability increases when hopping to used spectrum channels

Engineering Contradiction:

Improvespectrum sharing capabilityVSAvoidsignal collision probability

Core Design Contradiction:

Adaptability or versatilityVSReliability

Solution Approach 1:

The patent applies preliminary action by having the second communication system pre-acquire usage information about the first system's spectrum channels before performing frequency hopping, allowing it to select idle channels in advance and avoid collisions with active transmissions

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The patent implements feedback mechanisms where the second system continuously monitors and acquires usage information from the first system, using this feedback to adjust its frequency hopping pattern and channel selection to minimize interference and collisions

Inventive Principle:

Principle #23Feedback

Data Source

PatentUS10411755B2Method of sharing spectrum by frequency hopping and communication system using the same

Publication Date: 2019.09.10 AJOU UNIV IND ACADEMIC COOP FOUND

AI summary

A method of sharing a spectrum by frequency hopping includes receiving frequency usage information for a shared spectrum of a first communication system, setting a weight for determining a ratio of channels to be used for communication by frequency hopping of a second communication system from among first channels of the second communication system corresponding to an unused spectrum in the shared spectrum and second channels of the second communication system corresponding to a used spectrum in the shared spectrum, based on the received frequency usage information, and selecting a frequency hopping channel from among the first channels and the second channels based on the set weight.