Wireless Network Resource Coordination for Interference Management

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Solution Overview

Problem

Ultra-dense Networks (UDNs) operating on overlapping radio resources face significant interference issues due to their high-frequency deployments, which can degrade wireless link quality and reduce peak data rate and capacity, especially when multiple UDNs are deployed in close proximity.

Innovation Solution

A method and apparatus for coordinating resource scheduling between UDNs by detecting interference thresholds and initiating a resource coordination procedure to determine schedulable resources, allowing for orthogonal resource allocation to reduce interference and improve spectrum efficiency.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Productivity

If multiple UDNs operate on overlapping radio resources to maximize bandwidth utilization, then spectrum efficiency is improved, but interference between networks increases

Engineering Contradiction:

Improvespectrum efficiencyVSAvoidinterference

Core Design Contradiction:

ProductivityVSObject-affected harmful factors

Solution Approach 1:

The patent implements dynamic resource scheduling where UDNs can adaptively adjust their resource allocation based on real-time interference conditions. The system transitions from static frequency partitioning to dynamic time-frequency resource coordination, allowing networks to optimize spectrum usage while managing interference through coordinated scheduling decisions.

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The patent introduces a resource coordination mechanism that acts as an intermediary between interfering UDNs. This coordination system enables networks to exchange scheduling information and negotiate resource usage, effectively mediating the interference conflict while maintaining high spectrum efficiency through cooperative resource management.

Inventive Principle:

Principle #24Intermediary (Mediator)

2Area of stationary object

If UDNs are deployed in close proximity to increase network density, then service coverage is improved, but interference between neighboring UDNs increases

Engineering Contradiction:

Improveservice coverageVSAvoidinterference

Core Design Contradiction:

Area of stationary objectVSObject-affected harmful factors

Solution Approach 1:

The patent segments the radio resources into different time-frequency slots that can be dynamically assigned to different UDNs. This segmentation allows closely deployed UDNs to share the same physical space while operating on separated resource segments, reducing mutual interference while maintaining comprehensive service coverage.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The patent applies local quality by allowing different UDNs in the same geographic area to have different resource allocation patterns. Each UDN can optimize its local resource usage based on its specific traffic demands and interference environment, enabling high-density deployment with controlled interference through localized resource customization.

Inventive Principle:

Principle #3Local quality

3Object-affected harmful factors

If frequency bands are partitioned into multiple blocks assigned to different networks, then interference is reduced, but spectrum efficiency decreases

Engineering Contradiction:

ImproveinterferenceVSAvoidspectrum efficiency

Core Design Contradiction:

Object-affected harmful factorsVSProductivity

Solution Approach 1:

The patent implements periodic resource coordination procedures where UDNs regularly exchange scheduling information and adjust their resource allocation. This periodic coordination enables networks to maintain reduced interference through structured communication cycles while achieving high spectrum efficiency by continuously optimizing resource usage patterns based on changing traffic conditions.

Inventive Principle:

Principle #19Periodic action

Solution Approach 2:

The patent performs preliminary resource coordination before actual data transmission occurs. By pre-negotiating and allocating time-frequency resources before traffic bursts, the system reduces interference through advance planning while maximizing spectrum efficiency by ensuring resources are optimally assigned before utilization begins.

Inventive Principle:

Principle #10Preliminary action

Data Source

PatentUS10004084B2Methods and apparatuses for coordinating resource scheduling between wireless networks

Publication Date: 2018.06.19 TELEFONAKTIEBOLAGET LM ERICSSON (PUBL)

AI summary

Methods and apparatuses for coordinating resource scheduling between wireless networks are provided. The method comprises detecting whether interference on at least one interfered wireless link in the wireless network caused by at least one interfering wireless link in at least one second wireless network exceeds a pre-determined threshold. The method also comprises initiating a resource coordination procedure with the at least one second wireless network by transmitting a resource coordination message to the at least one second wireless network when the interference exceeds the pre-determined threshold. The method further comprises performing, based on the resource coordination message, the resource coordination procedure with the at least one second wireless network to determine schedulable resources. The method additionally comprises scheduling the at least one interfered wireless link based on the determined schedulable resources.