TDD Configuration Coordination for Adjacent-Band Cross-Link Interference

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Solution Overview

Problem

Existing wireless networks face challenges in coordinating time domain duplex (TDD) configurations among geographically proximate base stations of different service providers, leading to cross-link interference (CLI) and inefficient spectrum use, particularly in scenarios where operators have different traffic demands or regulatory constraints.

Innovation Solution

A Time Domain Duplex (TDD) Configuration Controller (TCC) automatically coordinates TDD configurations and transmission parameters among wireless network providers operating on adjacent TDD channels and bands, using network information to identify potential interference and assign compatible configurations to reduce CLI.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Object-affected harmful factors

If all operators synchronize their networks and use a common TDD configuration, then cross-link interference is reduced, but network flexibility and adaptability to different traffic demands are lost

Engineering Contradiction:

Improvecross-link interferenceVSAvoidnetwork configuration flexibility

Core Design Contradiction:

Object-affected harmful factorsVSAdaptability or versatility

Solution Approach 1:

The patent segments the TDD configuration management into two levels: a coordinated layer for interference-prone adjacent operators that share common TDD configurations, and independent layers for operators with different traffic patterns or regulatory constraints. This allows selective synchronization only where needed to reduce CLI while preserving flexibility elsewhere in the network.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The patent applies different TDD configuration strategies to different geographical locations and operator pairs based on local interference conditions and traffic demands. Rather than imposing a universal configuration, each region can adopt configurations optimized for its specific conditions, with coordination only where adjacent operators would cause CLI.

Inventive Principle:

Principle #3Local quality

2Adaptability or versatility

If operators use different TDD configurations to meet diverse traffic demands, then network adaptability is improved, but cross-link interference increases

Engineering Contradiction:

Improvetraffic demand accommodationVSAvoidcross-link interference

Core Design Contradiction:

Adaptability or versatilityVSObject-affected harmful factors

Solution Approach 1:

The patent introduces a coordination mechanism that acts as an intermediary between adjacent operators with different TDD configurations. This mediator identifies and coordinates configurations for specific operator pairs experiencing CLI, allowing operators to maintain their preferred configurations elsewhere while achieving synchronization only where interference occurs.

Inventive Principle:

Principle #24Intermediary (Mediator)

3Object-affected harmful factors

If manual site-by-site coordination is performed among operators, then interference management is improved, but scalability is reduced

Engineering Contradiction:

Improveinterference managementVSAvoidcoordination scalability

Core Design Contradiction:

Object-affected harmful factorsVSProductivity

Solution Approach 1:

The patent enables the TDD configuration coordination system to automatically identify interfering operator pairs, evaluate configuration options, and implement coordinated configurations without requiring manual intervention for each site. The system self-manages the coordination process, making it scalable to numerous operators and sites while maintaining effective interference management.

Inventive Principle:

Principle #25Self-service

Data Source

PatentUS12362897B2TDD configuration coordination for networks using adjacent bands

Publication Date: 2025.07.15 CHARTER COMM OPERATING LLC

AI summary

Various embodiments comprise systems, methods, architectures, mechanisms and apparatus for automatically coordinating time domain duplex (TDD) configurations and transmission parameters among wireless network providers operating on adjacent TDD channels and/or bands in proximity of each other to avoid cross link interference (CLI).