TDD Interference Measurement with UL/DL Configuration
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Solution Overview
Problem
In time-division duplexing (TDD) systems, eNBs and UEs face challenges in efficiently utilizing diverse interference measurement results due to varying UL/DL subframe configurations, leading to inconsistent measurement outcomes across different subframes, which complicates interference management.
Innovation Solution
A method for a communication device to receive signals, measure interference from cells with specific UL/DL configurations in subframes, and generate measurement results that include both interference data and configuration information, enabling efficient exploitation of interference metrics.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If interference measurement is performed in TDD system with varying UL/DL configurations, then measurement coverage is improved, but measurement consistency deteriorates
Solution Approach 1:
The patent applies preliminary action by having the network pre-configure multiple interference measurement resources (IMRs) with different UL/DL configuration settings before interference measurement is needed. The communication device selects the appropriate pre-configured IMR based on the current TDD configuration, ensuring consistent measurement methodology is applied in advance rather than adapting mid-measurement.
Solution Approach 2:
The patent implements parameter changes by dynamically selecting different interference measurement resources based on the TDD UL/DL configuration parameters. When the TDD configuration changes, the system changes the measurement resource parameters (such as which subframes are used for measurement) to maintain measurement consistency despite configuration variations.
2Adaptability or versatility
If diverse UL/DL configurations are supported, then system flexibility is improved, but interference management complexity increases
Solution Approach 1:
The patent applies universality by designing interference measurement resources that can serve multiple TDD configuration types. A single set of measurement resource definitions can be reused across different UL/DL configurations, reducing the need for configuration-specific measurement mechanisms and simplifying interference management while maintaining system flexibility.
Solution Approach 2:
The patent uses segmentation by dividing interference measurement resources into distinct, independently configurable units (measurement resource sets) that can be selectively activated based on TDD configuration. This segmentation allows the system to handle diverse configurations by enabling only the relevant measurement resource segments, reducing overall management complexity.
3Reliability
If interference measurement is performed across all subframes, then measurement completeness is improved, but resource utilization efficiency deteriorates
Solution Approach 1:
The patent applies local quality by configuring interference measurement resources with specific local characteristics suited to different TDD configurations. Different measurement resource sets have different local properties (such as which subframes are measurement subframes) that are optimized for specific configuration types, ensuring measurement completeness for the local configuration while avoiding waste in other configurations.
Solution Approach 2:
The patent implements partial action by having the communication device perform interference measurement only on the subset of subframes that are relevant for the current TDD configuration, rather than measuring all subframes. This partial measurement approach maintains measurement completeness for the active configuration while improving resource utilization efficiency by avoiding measurements on irrelevant subframes.
Data Source
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AI summary
A method of handling an interference measurement for a communication device in a time-division duplexing (TDD) system comprises receiving a signal; measuring an interference coming from at least one cell with at least one uplink/downlink (UL/DL) configuration in the TDD system in a subframe according to the signal, to obtain a measured interference; and generating a measurement result comprising the measured interference and information of the at least one UL/DL configuration of the at least one cell.