Multi-TRP Beam Group Reporting With Differential CSI Bitfields
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Solution Overview
Problem
Existing wireless communication systems face challenges in efficiently reporting beam groups from multiple transmission reception points (TRPs) due to high signaling overhead, particularly in multi-TRP scenarios, which affects beam management operations.
Innovation Solution
Implementing a method for group-based beam reporting where a UE reports measurements of reference signals from multiple TRPs using absolute and differential values, organized into preconfigured bitfields, to reduce signaling overhead and facilitate faster CSI reporting.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of information
If traditional beam reporting methods are used in multi-TRP scenarios, then complete beam measurement information can be reported, but signaling overhead becomes excessively high
Solution Approach 1:
The patent segments beam measurements into multiple groups (first group and second group) where each group contains measurements from different TRPs. This segmentation allows the UE to report beam measurements in an organized manner, reducing the complexity and overhead of reporting all measurements simultaneously while maintaining information completeness.
Solution Approach 2:
The patent changes the parameter representation by using differential values for the second group of beam measurements relative to the first group. Instead of reporting absolute values for all measurements, the differential encoding reduces the number of bits required to represent the second group, thereby reducing signaling overhead while preserving measurement accuracy.
2Measurement precision
If detailed beam measurements from multiple TRPs are reported, then beam management accuracy improves, but reporting time and processing complexity increase
Solution Approach 1:
The patent applies differential encoding where the second group of beam measurements is represented as differential values relative to the first group. This parameter transformation reduces the time required to transmit and process measurement data while maintaining the precision needed for accurate beam management decisions.
Solution Approach 2:
The patent establishes a reference framework by first reporting the first group of beam measurements as absolute values, which serve as a baseline. This preliminary action allows subsequent measurements in the second group to be efficiently encoded as differentials, reducing reporting time while maintaining measurement precision through the established reference.
Data Source
AI summary
Embodiments include methods for a user equipment (UE) configured for beam reporting in a wireless network. Such methods include receiving a configuration of at least first and second resource sets. Each resource set includes multiple reference signals associated with corresponding multiple spatial filtering configurations. Such methods include performing measurements on the reference signals of the first and second resource sets and sending, to the wireless network, a beam report including the measurements arranged in at least first and second groups. Each group includes measurements performed on a first reference signal from the first resource set and on a second reference signal from the second resource set. The first and second reference signals are received concurrently by the UE. One measurement included in the first group is expressed as an absolute value, while others in the first group are expressed as differential values relative to the absolute value.