DCI 2_0 Beam Index Segmentation for Precise Spatial Filter Alignment
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Solution Overview
Problem
In wireless communication systems, particularly in the 5G NR release 16, there is a need to improve the precision of downlink control information (DCI) 2_0 indication for user equipment (UE) to better determine beam direction information, especially in high-frequency bands like FR2-2, to ensure reliable communication.
Innovation Solution
The method involves configuring user equipment (UE) and base stations to include beam direction relevant information in the DCI 2_0, using bits to indicate beam indexes corresponding to reference signals, and ensuring that the spatial domain filter for transmission is aligned with the beam direction, allowing for precise determination of channel occupancy time and resource block availability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If beam direction relevant information is included in DCI 2_0, then measurement precision of beam determination is improved, but device complexity increases
Solution Approach 1:
The beam direction relevant information is segmented into multiple bits, where each bit corresponds to a specific beam index. This segmentation allows the UE to precisely determine beam direction by interpreting individual bit values, thereby improving measurement precision while maintaining manageable device complexity through structured information organization.
Solution Approach 2:
Different bits in the DCI 2_0 message carry different beam direction information for different beams. This local quality approach assigns specific meaning to each bit position, enabling the UE to selectively process beam information based on the bit values received, thus improving beam determination precision without uniformly increasing processing complexity for all beams.
2Reliability
If beam indexes corresponding to reference signals are used, then reliability of communication is improved, but information loss increases
Solution Approach 1:
The beam direction relevant information in DCI 2_0 serves multiple functions: it identifies beam indexes, indicates spatial domain filter alignment, and provides reference signal associations. This multi-functionality allows the same information structure to simultaneously improve communication reliability through accurate beam identification while minimizing information loss by consolidating multiple beam-related parameters into a unified indication mechanism.
Solution Approach 2:
The DCI 2_0 message acts as an intermediary that carries beam direction relevant information from the base station to the UE. This intermediary structure efficiently transmits beam index information and spatial filter alignment indicators, ensuring reliable beam determination while minimizing information loss through compact and optimized message formatting.
3Manufacturing precision
If spatial domain filter alignment is enforced, then manufacturing precision of beam transmission is improved, but ease of operation decreases
Solution Approach 1:
The base station pre-configures the UE with beam direction relevant information and spatial domain filter alignment requirements before actual beam transmission. This preliminary action establishes the precision framework in advance, allowing the UE to automatically apply the correct spatial filters during operation, thereby achieving high manufacturing precision while maintaining ease of operation through automated filter selection.
Solution Approach 2:
The UE autonomously determines beam direction and applies spatial domain filters based on the beam direction relevant information received in DCI 2_0. This self-service mechanism enables the UE to automatically align its spatial filters with the indicated beam directions, achieving precise beam transmission without requiring manual configuration, thus maintaining ease of operation while ensuring high manufacturing precision.
Data Source
AI summary
A wireless communication method by a UE includes: being configured by a base station to detect a DCI 2_0, and determining an indication information of the DCI 2_0 according to a first information.