UE Downlink Sensitivity Relaxation for Carrier Aggregation Interference
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Solution Overview
Problem
The coexistence of multiple operating bands in User Equipment (UE) for Carrier Aggregation (CA) leads to reception performance issues due to interference, particularly in 3GPP LTE and NR systems, affecting the downlink reception sensitivity.
Innovation Solution
The UE is equipped with transceivers, processors, and memory that allow for relaxing the reference sensitivity for downlink reception by implementing a Maximum Sensitivity Degradation (MSD) mechanism, enabling effective transmission and reception of signals across multiple bands.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If multiple operating bands are aggregated for Carrier Aggregation, then system capacity and service availability are improved, but reception sensitivity deteriorates due to coexistence interference
Solution Approach 1:
The patent applies parameter changes by modifying the reference sensitivity requirement parameter from its original strict value to a relaxed value that accounts for MSD. This allows the system to maintain multiple band aggregation while accepting a controlled degradation in sensitivity, thus resolving the contradiction between system capacity and reception sensitivity
Solution Approach 2:
The patent implements partial action by applying the MSD mechanism selectively to specific band combinations where coexistence interference occurs. Instead of uniformly relaxing sensitivity requirements across all bands, the solution targets only the affected scenarios, maintaining strict sensitivity requirements where interference is not an issue
2Reliability
If reference sensitivity requirements are maintained strictly, then reception performance is preserved, but coexistence interference between bands cannot be tolerated
Solution Approach 1:
The patent converts the harmful effect of coexistence interference into a manageable parameter by defining MSD as a quantitative metric. Instead of treating interference as an unacceptable defect, the solution measures and controls it, transforming the harmful factor into a controlled design parameter that can be compensated for through relaxed sensitivity requirements
Solution Approach 2:
The MSD mechanism acts as an intermediary between the conflicting requirements of multi-band operation and reception sensitivity. It provides a bridging concept that allows the system to navigate between these opposing demands by quantifying the interference effect and applying appropriate compensation
3Adaptability or versatility
If new operating band combinations are added for future compatibility, then forward compatibility is improved, but interference issues may arise in previously untested configurations
Solution Approach 1:
The patent applies universality by creating a general MSD framework that can be applied to any band combination, including future NR bands. The MSD mechanism serves as a universal solution that works across different frequency ranges and aggregation scenarios, enabling forward compatibility without requiring band-specific customizations
Data Source
AI summary
The present disclosure provides a UE. The UE includes at least one transceiver; at least one processor; and at least one memory that stores instructions and is operatively electrically connectable with the at least one processor. Operations performed based on the command being executed by the at least one processor may include: transmitting an uplink signal through the one or more transceivers; and receiving a downlink signal through the one or more transceivers, wherein a reference sensitivity set for the one or more transceivers for downlink reception is relaxed by the MSD.