Configured Grant Adaptation for Unlicensed Band Interference
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing wireless communication technologies in unlicensed bands face inefficiencies due to listen-before-talk failures and interference, leading to complex configurations that are not optimized for varying collision and interference environments.
Innovation Solution
A configurable configured grant (CG) system that allows for flexible configuration of CG-uplink control information (UCI) and CG-downlink feedback information (DFI), enabling adaptive features based on environmental conditions, such as deactivating features for low interference environments and allowing for autonomous retransmissions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If complex configurations are used to handle listen-before-talk failures and interference, then reliability is improved, but device complexity increases
Solution Approach 1:
The patent implements dynamic configuration where the network node adaptively adjusts configured grant parameters (such as time resources, frequency resources, and modulation schemes) based on real-time channel conditions and interference levels. This allows the system to maintain high reliability under varying conditions without requiring permanently complex configurations, as the complexity is only activated when needed based on environmental assessments.
Solution Approach 2:
The system changes key parameters of configured grants dynamically, including time-domain resources, frequency-domain resources, and physical layer parameters, based on channel quality indicators and interference measurements. This parameter adaptation enables the system to achieve reliable communication in challenging environments while keeping the base configuration simple for good conditions.
2Adaptability or versatility
If adaptive features are enabled for varying collision environments, then adaptability is improved, but device complexity increases
Solution Approach 1:
The patent employs dynamic adaptation mechanisms where the wireless device and network node adjust configured grant configurations based on assessed collision and interference environments. The system transitions between different operational modes (e.g., autonomous retransmission enabled/disabled, different time-resource allocations) based on real-time conditions, providing high adaptability without requiring all complex features to be simultaneously active.
Solution Approach 2:
The system applies different configuration strategies to different configured grants based on their specific purposes and channel conditions. Rather than uniformly applying complex adaptive features to all grants, the patent selectively enables adaptation only where needed (e.g., for grants in high-interference bands or for specific traffic types), thereby achieving necessary adaptability while minimizing overall device complexity.
3Productivity
If autonomous retransmissions are allowed, then productivity is improved, but loss of information increases due to potential conflicts with dynamic grants
Solution Approach 1:
The patent implements feedback mechanisms where the network node monitors autonomous retransmission activities and provides downlink control information to coordinate with configured grants. This feedback loop allows the system to detect potential conflicts between autonomous retransmissions and dynamically scheduled transmissions, enabling the network to resolve conflicts and prevent data loss while maintaining the productivity benefits of autonomous retransmission capability.
Solution Approach 2:
The system performs preliminary assessments of channel conditions and potential grant conflicts before allowing autonomous retransmissions to proceed. By evaluating the environment in advance and pre-coordinating with the network node when possible, the system can enable autonomous retransmission functionality that improves productivity while minimizing the risk of information loss through premature or conflicting transmissions.
Data Source
AI summary
A method, system and apparatus are disclosed. In one or more embodiments, a network node is provided. The network node includes processing circuitry configured to: determine adapted configured grant, CG, control information based at least on CG control information, and signal the adapted CG control information for configuring transmission on at least one CG resource.