Ultra-low Power Wireless Channel Selection via Frequency Segmentation

Solution Overview

Problem

Ultra-low power wireless communication systems face interference challenges in shared frequency bands, such as the ISM band, due to high transmission power from existing services like WLAN, making it difficult to maintain quality of service and causing potential disconnection.

Innovation Solution

An ultra-low power wireless communication apparatus with a sensing unit to detect state information of frequency channels and a channel determining unit that divides the frequency band based on allowable output power, assigns priority to bands with lower output power, and determines communication channels with minimal interference, using techniques like frequency sweeping and ranking to select optimal channels.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Use of energy by moving object

If ultra-low power communication is attempted in the ISM band, then power consumption is reduced, but communication reliability deteriorates due to interference from high power services

Engineering Contradiction:

Improvepower consumptionVSAvoidcommunication reliability

Core Design Contradiction:

Use of energy by moving objectVSReliability

Solution Approach 1:

The frequency band is divided into multiple sub-bands, and the system selectively uses only those sub-bands that are free from interference. This segmentation allows ultra-low power communication to operate in clean frequency segments while avoiding contaminated segments occupied by high power services.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The system dynamically changes frequency parameters by switching between different frequency channels and sub-bands based on detected interference conditions. This parameter change enables the system to maintain reliable communication by transitioning to cleaner frequency segments when interference is detected.

Inventive Principle:

Principle #35Parameter changes

2Adaptability or versatility

If frequency band sharing is implemented, then spectrum utilization is improved, but interference detection and channel selection complexity increases

Engineering Contradiction:

Improvespectrum utilizationVSAvoidchannel selection complexity

Core Design Contradiction:

Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The frequency band is divided into multiple sub-bands, and the system selectively uses only those sub-bands that are free from interference. This segmentation allows ultra-low power communication to operate in clean frequency segments while avoiding contaminated segments occupied by high power services.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The system performs autonomous interference detection and channel selection without external intervention. The apparatus automatically senses the radio environment, identifies suitable frequency channels, and switches channels as needed, reducing the need for complex external coordination or manual configuration.

Inventive Principle:

Principle #25Self-service

3Productivity

If wide bandwidth channels are used for high power services, then service capacity is improved, but available channels for ultra-low power communication are reduced

Engineering Contradiction:

Improveservice capacityVSAvoidavailable channel options

Core Design Contradiction:

ProductivityVSAdaptability or versatility

Solution Approach 1:

The frequency band is divided into multiple sub-bands, and the system selectively uses only those sub-bands that are free from interference. This segmentation allows ultra-low power communication to operate in clean frequency segments while avoiding contaminated segments occupied by high power services.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The system transitions from considering only frequency dimension to utilizing both frequency and temporal dimensions. By monitoring interference over time and switching channels based on temporal patterns of high power service activity, the system finds additional available channels that would be unavailable if only static frequency allocation were used.

Inventive Principle:

Principle #17Another dimension (Dimensionality change)

Data Source

PatentUS9107079B2Ultra-low power wireless communication apparatus and method

Publication Date: 2015.08.11 SAMSUNG ELECTRONICS CO LTD

AI summary

An ultra-low power wireless communication apparatus and an ultra-low power wireless communication method are provided. The ultra-low power wireless communication apparatus includes a sensing unit configured to sense state information of frequency channels in a frequency band. The ultra-low power wireless communication apparatus further includes a channel determining unit configured to divide the frequency band into frequency bands based on an allowable output power, assign a priority to one of the frequency bands that includes an output power that is less than or equal to the allowable output power, and determine a communication channel based on the state information of the frequency channels.