Wireless IoT Asynchronous Frequency Hopping to Reduce Channel Conflicts

Solution Overview

Problem

Conventional frequency hopping communication in large-scale networks leads to inefficient channel utilization due to synchronized frequency hopping of multiple nodes, resulting in packet loss and throughput degradation.

Innovation Solution

A communication method for wireless internet of things that employs asynchronous frequency hopping networking, where the available bandwidth is divided into signaling and service channels, with designated time slots for network signaling and service communication, allowing each node to use a unique frequency hopping sequence.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of operation

If synchronized frequency hopping is used for communication, then communication simplicity is maintained, but channel utilization efficiency deteriorates due to multiple nodes conflicting on the same frequency

Engineering Contradiction:

Improvecommunication simplicityVSAvoidchannel utilization efficiency

Core Design Contradiction:

Ease of operationVSProductivity

Solution Approach 1:

The patent changes the frequency hopping parameter from synchronized to asynchronous operation. Each node uses its own frequency hopping sequence independently, eliminating the need for synchronization while improving channel utilization. This is achieved by allowing nodes to hop frequencies at different times based on their individual sequences rather than following a unified synchronized pattern.

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The patent introduces dynamic frequency hopping where each node independently selects and switches frequencies based on its own sequence. This dynamic behavior allows the system to adapt to channel conditions and avoid conflicts without requiring centralized coordination or synchronization, thereby maintaining operational simplicity while improving efficiency.

Inventive Principle:

Principle #15Dynamics

2Device complexity

If unified frequency hopping sequence is used by all nodes, then system coordination is simplified, but packet loss increases due to frequency conflicts among multiple nodes

Engineering Contradiction:

Improvesystem coordination complexityVSAvoidpacket loss rate

Core Design Contradiction:

Device complexityVSReliability

Solution Approach 1:

The patent changes the frequency hopping parameter from synchronized to asynchronous operation. Each node uses its own frequency hopping sequence independently, eliminating the need for synchronization while improving channel utilization. This is achieved by allowing nodes to hop frequencies at different times based on their individual sequences rather than following a unified synchronized pattern.

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The patent segments the unified frequency hopping sequence into multiple independent sequences, one for each node. This segmentation allows each node to operate independently on its own frequency timeline, reducing conflicts and packet loss while maintaining individual sequence simplicity without requiring complex coordinated hopping patterns.

Inventive Principle:

Principle #1Segmentation

3Quantity of substance

If multiple nodes communicate simultaneously on the same frequency, then communication overhead is reduced, but throughput degradation occurs due to channel conflicts

Engineering Contradiction:

Improvecommunication overheadVSAvoidthroughput

Core Design Contradiction:

Quantity of substanceVSProductivity

Solution Approach 1:

The patent changes the frequency hopping parameter from synchronized to asynchronous operation. Each node uses its own frequency hopping sequence independently, eliminating the need for synchronization while improving channel utilization. This is achieved by allowing nodes to hop frequencies at different times based on their individual sequences rather than following a unified synchronized pattern.

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The patent employs periodic frequency hopping where each node independently hops to different frequencies at regular intervals according to its own sequence. This periodic independent hopping allows multiple nodes to communicate simultaneously with minimal overhead while avoiding throughput degradation by distributing them across different frequency-time slots.

Inventive Principle:

Principle #19Periodic action

Data Source

PatentUS12413260B2Communication method of wireless internet of things under asynchronous frequency hopping networking

Publication Date: 2025.09.09 WILLFAR INFORMATION TECH CO LTD

AI summary

A communication method of wireless internet of things under asynchronous frequency hopping networking includes steps of: S10, network-wide channel and time slot planning; S20, network negotiation; S30, network access of first-level child nodes; S40, network access of second-level child nodes; and S50, network maintenance and service message transmission. The communication method is simple, and easy to operate, which releases network configuration message through signaling channels, and can realize efficient networking, wherein each child node carries out frequency hopping communication in accordance with different frequency hopping sequences. The channel utilization rate is effectively improved through asynchronous frequency hopping of all the nodes in the whole network.