Multi-Radio Coexistence via Interference Pattern Reporting
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Solution Overview
Problem
Existing wireless communication systems face challenges in coexistence among radios operating in adjacent frequency bands, leading to interference issues such as loss of connectivity, decreased data throughput, and increased current drain, particularly in scenarios with limited guard bands and cost constraints in user equipment.
Innovation Solution
A method for multi-radio coexistence where a victim UE measures interference patterns from an adjacent carrier system, determines spatial characteristics, and reports to its base station to mitigate interference by avoiding time and frequency overlaps with the aggressor UE's resources, using techniques like spatial processing and scheduling adjustments.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If guard bands are introduced between adjacent frequency bands to reduce interference, then interference between bands is reduced, but viable radio frequency spectrum for operational use is removed
Solution Approach 1:
The system dynamically adjusts the guard band configuration based on detected interference patterns. The victim UE measures interference from the aggressor UE and reports timing information, allowing the base station to dynamically schedule resources and adjust guard band placement in real-time rather than using static guard bands, thereby reducing spectrum waste while maintaining interference protection
Solution Approach 2:
The system changes the timing and frequency parameters of resource allocation based on detected interference patterns. By adjusting the timing offset and frequency resource assignment dynamically according to the aggressor UE's transmission patterns, the system optimizes spectrum utilization while maintaining adequate interference protection
2Object-affected harmful factors
If improved filtering and antenna separation are used to reduce adjacent channel leakage, then interference is reduced, but implementation becomes difficult or prohibitively expensive in user equipment
Solution Approach 1:
The system replaces physical filtering and antenna separation mechanisms with signal processing and scheduling-based interference mitigation. The victim UE detects interference patterns and reports timing information, enabling the base station to use software-based resource allocation and scheduling adjustments instead of expensive hardware filtering, making interference reduction feasible in cost-constrained user equipment
Solution Approach 2:
The system introduces an intermediary measurement and reporting mechanism where the victim UE measures interference and reports timing information to the base station. This intermediary layer enables coordinated resource allocation that achieves interference mitigation without requiring complex hardware modifications in the user equipment
3Quantity of substance
If multiple radios operate in adjacent frequency bands without coexistence mechanisms, then spectrum utilization is maximized, but interference causes loss of connectivity, decreased data throughput, and increased current drain
Solution Approach 1:
The system implements a feedback loop where the victim UE continuously measures interference from the aggressor UE and reports timing information back to the base station. The base station uses this feedback to dynamically adjust resource allocation and scheduling decisions, maintaining reliable connectivity and data throughput while maximizing spectrum utilization through coordinated multi-radio operation
Solution Approach 2:
The system performs preliminary interference measurement and pattern detection before resource allocation decisions are made. The victim UE measures interference patterns and reports timing information in advance, allowing the base station to proactively configure resources that avoid interference, thereby ensuring reliable connectivity and throughput while maintaining high spectrum utilization
Data Source
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AI summary
A method (500) and apparatus for multi-radio coexistence has a victim user equipment (UE) that receives (515) a sequence of subframes at a first transceiver from a serving base station, measures (520) channel state on the subframes to obtain channel state measurements, determines (530) a high-low interference pattern based on the channel state measurements, and transmits (550) to the serving base station a report that includes an indicator related to the high-low interference pattern. The method can include the victim UE receiving (610) an aggressor reference waveform (ARW) from the second transceiver, determining (620) spatial characteristics of the second transceiver from the ARW, and configuring (630) its antenna system based on the spatial characteristics. The method can have the victim UE determining (640) second transceiver characteristics from the ARW and transmitting (650) information regarding the second transceiver characteristics to its serving base station.