UE QCL Parameter Sharing Across Frequency Bands
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Solution Overview
Problem
Current wireless communication systems, particularly in 5G and LTE networks, face challenges in efficiently managing and updating quasi co-location (QCL) parameters across multiple frequency bands, which affects beam management and resource allocation, leading to suboptimal performance in mobile broadband access and interference mitigation.
Innovation Solution
The method involves user equipment (UE) reporting its capability to apply a common spatial QCL parameter across a group of frequency bands and receiving indications of changes to transmission control indicator (TCI) states or spatial relation parameters, allowing network entities to signal and apply these changes simultaneously across the bands, thereby optimizing beam management and resource allocation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If QCL parameters are managed separately for each frequency band, then measurement precision and beam management accuracy are improved, but device complexity and signaling overhead increase
Solution Approach 1:
The patent merges QCL parameter management across multiple frequency bands by introducing a common spatial QCL parameter that applies to a group of bands simultaneously. This reduces the number of separate parameter sets that must be maintained and signaled, thereby reducing device complexity and signaling overhead while maintaining beam management accuracy through the unified parameter application.
Solution Approach 2:
The common spatial QCL parameter serves multiple frequency bands simultaneously, making it a universal parameter that fulfills the beam management function across different bands. This multi-functional approach allows a single parameter to replace multiple band-specific parameters, reducing overall system complexity while preserving measurement precision through consistent spatial QCL information.
2Productivity
If QCL parameters are updated simultaneously across multiple bands, then communication efficiency and spectral efficiency are improved, but signaling overhead and network entity processing complexity increase
Solution Approach 1:
The patent combines QCL parameter updates across multiple bands into a single common parameter update mechanism. Instead of transmitting separate update signals for each band, the network entity signals a common spatial QCL parameter change that applies to the entire band group simultaneously, reducing signaling overhead while achieving efficient coordinated updates across all bands.
Solution Approach 2:
The UE reports its capability to apply common spatial QCL parameters before the actual parameter updates occur. This preliminary capability indication allows the network entity to plan and execute simultaneous multi-band updates efficiently, reducing signaling overhead by knowing in advance that the UE can handle common parameter application across bands.
3Adaptability or versatility
If band-specific QCL parameters are used, then adaptability to different frequency characteristics is improved, but ease of operation and resource allocation simplicity deteriorate
Solution Approach 1:
The patent segments frequency bands into groups that can share common spatial QCL parameters. This segmentation allows bands with similar propagation characteristics to be managed together, maintaining adaptability to frequency-specific conditions while simplifying resource allocation and operation through reduced parameter management complexity within each segment.
Solution Approach 2:
The patent applies local quality by allowing different QCL parameter strategies for different band groups. Bands that benefit from common parameter management can use the simplified approach, while bands requiring more specialized handling can maintain individual parameter sets, thus preserving local adaptability while improving overall ease of operation.
Data Source
AI summary
Aspects of the present disclosure relate to wireless communications, and more particularly, to techniques for signaling user equipment (UE) capability for sharing quasi co-location (QCL) parameter across a group of frequency bands. For example, the UE may report, to a network entity, a capability of the UE to apply a common spatial QCL parameter for at least one group of frequency bands. The UE receives an indication of a change to the common transmission control indicator (TCI) states or spatial relation parameter to be applied across the group of frequency bands. The UE applies the change across the group of frequency bands.