UE Receive Beam Adaptation for Multi-TRP Desensitization
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Solution Overview
Problem
Existing wireless communication systems fail to address the desensitization of receivers due to multi-Transmission Point (TRP) interference, particularly in high Signal-to-Noise Ratio (SNR) regions, which limits performance beyond conventional 3GPP core requirements.
Innovation Solution
A UE is equipped to measure and adapt receive beams to mitigate desensitization by calculating Effective Isotropic Sensitivity (EIS) differences between TRPs, allowing it to improve signal reception and communicate desensitization to network entities.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the UE receives signals from multiple TRPs simultaneously using multiple receive beams, then the signal reception capability is improved, but receiver desensitization occurs due to interference between TRPs
Solution Approach 1:
The UE measures desensitization levels by calculating EIS differences between TRPs and feeds back this information to the network entity. The network entity uses this feedback to adjust transmission parameters, creating a closed-loop system that dynamically manages interference while maintaining multi-TRP reception benefits
Solution Approach 2:
The system changes transmission parameters (power, beamforming weights) based on measured desensitization levels. By adjusting these parameters dynamically, the system optimizes the balance between utilizing multiple TRPs for improved reception and managing the harmful interference that causes desensitization
2Reliability
If the UE adapts receive beams to reduce desensitization, then receiver sensitivity is improved, but the complexity of beam management increases
Solution Approach 1:
The UE focuses beam adaptation efforts on the most significant interference sources identified through EIS measurements. Rather than continuously adjusting all beams, the system applies adaptation selectively to beams experiencing desensitization, reducing complexity while maintaining sensitivity
Solution Approach 2:
The UE autonomously measures desensitization levels and determines appropriate beam adaptations without requiring complex network coordination. This self-service approach simplifies the overall system complexity while maintaining reliable receiver sensitivity
3Productivity
If the UE measures and reports desensitization information to the network entity, then the network can optimize transmission, but the signaling overhead increases
Solution Approach 1:
The system extracts only the essential desensitization information (EIS differences) needed for network optimization and reports this condensed data to the network entity. This selective extraction reduces signaling overhead while providing sufficient information for effective transmission optimization
Data Source
AI summary
Various aspects of the present disclosure relate to a User Equipment (UE) configured to or operable to receive, from a first transmission reception point (TRP), a first signal using a first receive beam of the UE, receive, from a second TRP, a second signal using a second receive beam of the UE, wherein the first TRP and the second TRP are located at different directions from the UE, determine a first desensitization associated with the first receive beam, determine a second desensitization associated with the second receive beam, and perform at least one of adapting at least one of the first and second receive beams to improve reception of one or both of the first signal and second signal by the UE, and communicating at least one of the first desensitization and the second desensitization to a network entity.