Coexistence Manager for TV White Space Frequency Sharing

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Solution Overview

Problem

Current communication systems lack an effective method for managing resources to enable efficient coexistence and frequency sharing among multiple systems using different communication patterns, particularly when sharing available frequency bands from already used bands like the TV band, which leads to inefficiencies in frequency resource utilization.

Innovation Solution

A system and method that includes a coexistence manager, coexistence enabler, and coexistence discovery and information server to detect available frequency bands, manage coexistence, and facilitate frequency sharing among multiple systems, ensuring efficient use of limited frequency resources without interfering with primary incumbents, by classifying and allocating channels in white spaces.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Productivity

If multiple systems use available frequency bands from already used bands (e.g., TV band), then frequency resource utilization efficiency is improved, but interference to primary incumbents and system coexistence problems occur

Engineering Contradiction:

Improvefrequency resource utilization efficiencyVSAvoidinterference to primary incumbents

Core Design Contradiction:

ProductivityVSObject-affected harmful factors

Solution Approach 1:

The system performs preliminary spectrum sensing and database registration before actual communication. Primary incumbents register their usage patterns in advance, and secondary systems query this database to identify available frequency bands, preventing interference before it occurs

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The system implements continuous feedback mechanisms where primary incumbents report their actual usage patterns, and secondary systems adjust their frequency selection based on this feedback. The database is updated with real-time information about spectrum availability and usage

Inventive Principle:

Principle #23Feedback

2Productivity

If multiple systems with different communication patterns share available frequency bands, then frequency resource utilization efficiency is improved, but coexistence management complexity increases

Engineering Contradiction:

Improvefrequency resource utilization efficiencyVSAvoidcoexistence management complexity

Core Design Contradiction:

ProductivityVSDevice complexity

Solution Approach 1:

The patent introduces a coexistence manager as an intermediary component that handles the complexity of managing multiple systems with different communication patterns. This manager mediates between primary and secondary systems, coordinating frequency sharing and resolving conflicts

Inventive Principle:

Principle #24Intermediary (Mediator)

Solution Approach 2:

The coexistence manager performs multiple functions including spectrum sensing, database management, frequency allocation, and conflict resolution. This multi-functional approach consolidates complexity into a single manageable component rather than requiring separate mechanisms for each function

Inventive Principle:

Principle #6Universality (Multi-functionality)

3Productivity

If detailed frequency band detection and coexistence management methods are implemented, then frequency resource utilization efficiency is improved, but system complexity and implementation difficulty increase

Engineering Contradiction:

Improvefrequency resource utilization efficiencyVSAvoidsystem implementation difficulty

Core Design Contradiction:

ProductivityVSEase of manufacture

Solution Approach 1:

The system divides the complex frequency management task into separate functional modules: spectrum sensing module, database module, coexistence manager module, and frequency allocation module. This segmentation allows each component to be developed, tested, and implemented independently, reducing overall implementation difficulty

Inventive Principle:

Principle #1Segmentation

Data Source

PatentUS9019910B2System and method for managing resource in communication system

Publication Date: 2015.04.28 ELECTRONICS & TELECOMM RES INST

AI summary

A system for managing resources in a communication system including a plurality of systems, which do not have a permission for a first frequency band, includes a plurality of coexistence managers configured to, when a frequency band available for the plurality of systems is searched from the first frequency band, manage the plurality of systems for coexistence and frequency sharing of the plurality of systems in the available frequency band; a coexistence enabler configured to transmit and receive information of the plurality of systems and information of the coexistence manager; and a coexistence discovery and information server configured to support control of the coexistence manager over the plurality of systems, wherein predetermined messages are transmitted and received among the coexistence discovery and information server, the plurality of coexistence managers and the coexistence enabler to discover neighbor systems among the plurality of systems.