Cross-Frequency Beam Mapping for Beam Squint Mitigation
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Solution Overview
Problem
Existing wireless networks face challenges in efficiently managing beams for signal transmission and reception across different frequency ranges due to beam squint phenomenon, leading to signal quality degradation and increased system complexity.
Innovation Solution
A method and apparatus for determining a set of beams in a first frequency range and mapping them to a different frequency range based on target angles of incidence, using data structures to optimize beam usage and reduce the need for redundant beam training procedures.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If beam sets are separately designed for each frequency range, then signal quality is maintained, but system complexity and signaling overhead increase
Solution Approach 1:
The patent applies universality by designing a single beam set that can be used across multiple frequency ranges. The beam management entity determines a beam set for a first frequency range and then maps this same beam set to a second frequency range, allowing one beam set to serve multiple frequency ranges instead of requiring separate beam sets for each range.
Solution Approach 2:
The patent applies parameter changes by modifying beam parameters based on frequency range characteristics. The beam management entity adjusts beamforming parameters when mapping beams from one frequency range to another, optimizing beam performance for different frequency characteristics while maintaining the same underlying beam set structure.
2Measurement precision
If separate beam training procedures are performed for each frequency range, then beam accuracy is improved, but signaling overhead and training time increase
Solution Approach 1:
The patent applies preliminary action by performing beam training once for the first frequency range and then reusing the trained beam set for the second frequency range through mapping. This eliminates the need to perform complete beam training separately for each frequency range, reducing training time while maintaining beam accuracy through the mapping process.
3Productivity
If frequency domain multiplexing is implemented without beam mapping, then resource utilization improves, but interference increases due to beam squint
Solution Approach 1:
The patent applies parameter changes by adjusting beamforming parameters according to the target frequency range. When mapping beams from one frequency range to another, the system modifies beam parameters to account for frequency-dependent effects like beam squint, thereby enabling frequency domain multiplexing while mitigating interference through optimized parameter selection.
Data Source
AI summary
An apparatus comprising means for determining a set of beams for use in transmitting and/or receiving at least one signal in a first frequency range; determining at least one mapped beam, wherein determining the at least one mapped beam comprises mapping at least one beam of the set of beams to at least a second, different frequency range; and causing transmission and/or reception of at least one signal in the second, different frequency range using the at least one mapped beam.