Coexistence Manager for Dynamic Frequency Sharing in Communication Systems

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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, without interfering with primary incumbents.

Innovation Solution

A system and method for managing resources in a communication system that includes a coexistence manager, coexistence enabler, and coexistence discovery and information server, which facilitate negotiation among systems using an etiquette mode, round-robin mode, or competition mode to allocate and share available frequency bands, ensuring efficient coexistence and frequency sharing among multiple systems.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Productivity

If frequency sharing is implemented to increase frequency resource utilization efficiency, then frequency resource utilization efficiency is improved, but interference to primary incumbents may 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 detection to identify available frequency bands before secondary systems transmit. The coexistence manager proactively detects primary incumbent presence and reserves frequency resources accordingly, preventing interference before it occurs.

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The system implements continuous feedback mechanisms where secondary systems report their transmission status and primary systems monitor for interference. The coexistence manager uses this feedback to dynamically adjust frequency allocations and transmission parameters to maintain efficiency while preventing harmful interference.

Inventive Principle:

Principle #23Feedback

2Productivity

If multiple different systems use the available frequency band, then frequency resource utilization efficiency is improved, but coexistence problems arise due to different communication patterns

Engineering Contradiction:

Improvefrequency resource utilization efficiencyVSAvoidcoexistence among different systems

Core Design Contradiction:

ProductivityVSReliability

Solution Approach 1:

The system segments the available frequency band into multiple sub-bands or time slots that are allocated to different secondary systems based on their communication patterns. The coexistence manager divides resources so that systems with different access patterns can coexist without mutual interference, maintaining both efficiency and reliability.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The system dynamically adjusts frequency allocations and transmission parameters based on real-time detection of primary incumbent presence and secondary system requirements. The coexistence manager continuously adapts the spectrum usage pattern to accommodate different communication modes while maintaining efficient resource utilization.

Inventive Principle:

Principle #15Dynamics

3Object-affected harmful factors

If detection of available frequency band is performed to confirm primary incumbent usage, then interference prevention is improved, but detection complexity increases

Engineering Contradiction:

Improveinterference preventionVSAvoiddetection complexity

Core Design Contradiction:

Object-affected harmful factorsVSDevice complexity

Solution Approach 1:

The spectrum sensing mechanism serves multiple functions: detecting primary incumbent presence, identifying available frequency bands, and characterizing the electromagnetic environment. By making the detection system multi-functional, the patent reduces overall system complexity while maintaining effective interference prevention.

Inventive Principle:

Principle #6Universality (Multi-functionality)

Data Source

PatentUS8804510B2System and method for managing resource in communication system

Publication Date: 2014.08.12 ELECTRONICS & TELECOMM RES INST

AI summary

A system for managing resources in a communication system including systems which do not have a permission for a first frequency band includes a coexistence manager configured to, when a frequency band available for the systems is searched from the first frequency band, manage the systems for coexistence and frequency sharing of the systems in the available frequency band; a coexistence enabler configured to transmit and receive information of the systems and information of the coexistence manager; and a coexistence discovery and information server configured to support control of the coexistence manager over the systems, wherein a plurality of coexistence managers are provided to respectively correspond to the plurality of systems, and wherein, among the plurality of coexistence managers, a first coexistence manager performs a negotiation procedure with coexistence managers neighboring to it, on the basis of one of an etiquette mode, a round-robin mode and a competition mode.