Dynamic TDD CLI Measurement Using Validity Indications
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Solution Overview
Problem
Existing wireless communication systems face challenges in accurately measuring cross-link interference (CLI) due to dynamic time division duplex (TDD) operations, as current methods assume CLI resources are always valid, leading to inaccurate CLI level assessments when communication directions change dynamically.
Innovation Solution
A UE receives a CLI measurement configuration with semi-statically configured measurement occasions and a dynamic indication for valid measurement times, allowing accurate CLI measurement only when interference exists, based on the dynamic usage of flexible symbols.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If dynamic TDD operations are implemented to improve TDD UL/DL configuration flexibility, then adaptability is improved, but CLI measurement accuracy deteriorates due to invalid measurement occasions
Solution Approach 1:
The patent applies dynamics by introducing dynamic indications that activate or deactivate CLI measurement occasions based on real-time TDD configuration changes. The measurement occasion validity is no longer fixed but dynamically adjusted according to whether uplink or downlink transmission is currently configured, allowing the system to adapt to changing TDD conditions while maintaining measurement accuracy.
Solution Approach 2:
The patent implements feedback mechanisms where the network node provides dynamic indications to the UE about the validity of CLI measurement occasions. This feedback loop ensures that measurements are only performed when the current TDD configuration supports accurate CLI measurement, thereby maintaining measurement precision while enabling flexible TDD operation.
2Ease of operation
If CLI measurement occasions are configured to be always valid, then ease of operation is improved, but measurement precision deteriorates when communication directions change dynamically
Solution Approach 1:
The patent transitions from static always-valid measurement occasions to dynamic occasions with conditional validity. The dynamic indication mechanism automatically adjusts measurement availability based on current TDD configuration, eliminating the need for manual configuration while ensuring accurate measurements only occur when appropriate.
Solution Approach 2:
The system performs self-adjustment by automatically determining when CLI measurement occasions are valid based on the current TDD configuration. The network node autonomously provides dynamic indications without requiring UE intervention, making the system self-regulating and maintaining both ease of operation and measurement precision.
3Measurement precision
If dynamic indications are introduced to improve CLI measurement accuracy, then measurement precision is improved, but device complexity increases
Solution Approach 1:
The patent segments the CLI measurement configuration into two parts: semi-static configuration parameters and dynamic indications. The semi-static part defines potential measurement occasions, while the dynamic indication activates or deactivates specific occasions based on current TDD configuration. This segmentation reduces overall complexity by separating configuration from real-time control.
Solution Approach 2:
The dynamic indication mechanism serves multiple functions: it activates/deactivates measurement occasions, provides validity information, and adapts to TDD configuration changes. By consolidating these functions into a single mechanism, the patent improves measurement precision without proportionally increasing device complexity.
Data Source
AI summary
Various aspects of the present disclosure relate to interference handling in dynamic time division duplex operation. An apparatus is configured to receive a configuration comprising a set of resources, wherein a resource of the set of resources is configured for cross-link interference (CLI) measurement based on an indication and perform the CLI measurement on the resource based at least in part on whether the indication is received, wherein the indication indicates to perform the CLI measurement on the resource.