Spatial Preemption Indication for Wireless Beam Interference
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Solution Overview
Problem
Current wireless communication systems, particularly in 5G NR and LTE, face challenges in efficiently managing spatial directions for transmitting or receiving signals, which can lead to interference and suboptimal performance.
Innovation Solution
The implementation of spatial preemption indications (PIs) in wireless communication systems, which allow user equipment (UE) to avoid using specific beams for transmitting or receiving target signals, thereby mitigating interference and improving signal quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If spatial preemption indications are implemented to avoid interference, then signal quality and reliability are improved, but system complexity and overhead increase
Solution Approach 1:
The spatial preemption indication is segmented into multiple fields including a first field indicating time domain resources, a second field indicating frequency domain resources, and a third field indicating spatial domain resources. This segmentation allows the system to provide detailed spatial preemption information without overwhelming complexity, as each field can be independently processed and interpreted by the UE.
Solution Approach 2:
The patent introduces a new dimension of spatial domain resource indication in addition to traditional time and frequency domain resource indications. This dimensional expansion allows the system to precisely identify and avoid spatial directions with interference, improving signal quality while maintaining manageable complexity through structured field organization.
2Reliability
If spatial preemption indications are used to avoid interference, then communication reliability is improved, but downlink control information overhead increases
Solution Approach 1:
The spatial preemption indication is applied locally to specific spatial directions, time resources, and frequency resources rather than globally. The first field, second field, and third field each target specific resource dimensions, allowing the system to provide precise interference avoidance information with minimal overhead by only indicating where preemption is needed rather than blanket restrictions.
Solution Approach 2:
The patent changes the parameters of control information by introducing a compact three-field structure that efficiently encodes spatial, temporal, and spectral preemption information. This parameterization allows the system to convey comprehensive preemption details in a condensed format, reducing overall control information overhead while maintaining communication reliability.
3Adaptability or versatility
If spatial preemption is implemented for multiple traffic types, then system adaptability is improved, but processing complexity increases
Solution Approach 1:
The spatial preemption indication mechanism is designed with universal applicability across multiple traffic types and service requirements. The three-field structure can accommodate different traffic patterns, QoS requirements, and spatial configurations, allowing a single mechanism to serve multiple functions and traffic types without requiring separate processing logic for each scenario.
Solution Approach 2:
The system dynamically adjusts spatial preemption indications based on current traffic conditions, interference patterns, and spatial relationships. The indication fields can be flexibly configured and updated to match varying traffic types and spatial scenarios, enabling the system to adapt to changing conditions while maintaining manageable processing complexity through standardized field interpretation.
Data Source
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AI summary
Some aspects provide a method for wireless communication by a user equipment (UE). The method generally includes receiving signaling of a spatial preemption indication (PI), identifying, based on the spatial PI, at least one beam that the UE is preempted from using for at least one of transmitting or receiving at least one target signal, and refraining from using the identified beam for transmitting or receiving the target signal, for at least a time period.