Dynamic MSD Measurement for UE Self-Interference
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing communication systems face inefficiencies in determining self-interference metrics for user equipment (UE) due to outdated static maximum sensitivity degradation (MSD) values, which do not accurately reflect the dynamic radio resource conditions, leading to suboptimal resource allocation and network decisions.
Innovation Solution
A method for user equipment to measure self-interference by aligning measurement timing and frequency with downlink and uplink resource elements, using gapless techniques such as DMRS, SRS, and rate matching to derive a dynamic MSD value, which is then reported to the network for informed resource allocation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If static maximum sensitivity degradation (MSD) values are used for self-interference measurement, then the measurement process is simple, but the accuracy of self-interference metrics is poor and does not reflect dynamic radio resource conditions
Solution Approach 1:
The patent transforms the static MSD value approach into a dynamic measurement system where the user equipment continuously measures self-interference on downlink resource elements during uplink transmissions. The MSD value is no longer fixed but is dynamically determined based on actual measured power differences between affected and unaffected resource elements, allowing the system to adapt to changing radio conditions while maintaining measurement accuracy.
Solution Approach 2:
The user equipment performs self-measurement of its own self-interference by measuring the power difference on downlink resource elements that are affected by its uplink transmission versus those that are not affected. This self-service approach eliminates the need for external measurement infrastructure and enables the UE to autonomously provide accurate self-interference metrics to the network.
2Measurement precision
If gapless measurement techniques are used for self-interference measurement, then measurement accuracy is improved, but the impact on downlink capacity increases
Solution Approach 1:
The patent applies gapless measurement techniques selectively only on specific downlink resource elements that are affected by uplink transmission, rather than applying them system-wide. By identifying and measuring only the affected resource elements (those experiencing self-interference) versus unaffected ones, the system achieves accurate MSD measurement while minimizing the overall impact on downlink capacity.
Solution Approach 2:
The measurement is performed partially on a subset of downlink resource elements rather than on all downlink resources. The UE measures power differences on specific affected resource elements and compares them with unaffected ones, achieving sufficient measurement accuracy without the excessive resource consumption that would result from measuring all downlink resources.
3Adaptability or versatility
If dynamic MSD values are derived and reported to the network, then radio resource control decisions are improved, but the signaling overhead increases
Solution Approach 1:
The patent changes the parameter being reported from a static MSD value to a dynamic measured self-interference metric. The UE calculates and reports the actual measured power difference or derived MSD value based on current conditions, enabling the network to make more accurate and adaptive resource allocation decisions. This parameter change allows the system to respond to changing interference conditions while keeping signaling overhead manageable by reporting only the essential metric.
Data Source
Figure 1
Figure 2~3
Figure 4
AI summary
There is provided an apparatus, method, and computer program for causing a user equipment to perform: obtaining, based on at least one downlink carrier received during an uplink transmission, at least one value indicative of a self-interference by measuring a power difference in downlink resource elements affected by active resource elements of the uplink transmission and downlink resource elements affected by empty resource elements of the uplink transmission.