TCI State Groups for Multi-Stream Beam Management
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Solution Overview
Problem
In wireless communication systems, particularly in 5G New Radio (NR), the existing methods for beam configuration in beam-based communication scenarios face challenges in efficiently managing multiple streams and minimizing inter-beam interference, leading to suboptimal performance in multi-stream communication.
Innovation Solution
The proposed solution involves a method where a user equipment (UE) obtains beam quality metrics for each transmit beam and generates a beam report to a radio access network (RAN) entity. Based on this report, the RAN entity groups the transmit beams into beam groups and configures transmission configuration indicator (TCI) state groups for the UE, optimizing beam selection for multi-stream communication.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If multiple TCI states are configured for multi-stream communication, then communication capacity is improved, but inter-beam interference increases and performance deteriorates
Solution Approach 1:
The patent segments TCI states into multiple TCI state groups, where each group contains one or more TCI states. This segmentation allows the system to manage multiple beams more effectively by organizing them into structured groups, enabling selective activation of appropriate groups based on channel conditions to maintain high communication capacity while controlling interference through organized beam management
Solution Approach 2:
The patent introduces dynamic switching between different TCI state groups based on channel conditions and interference levels. The UE and base station can dynamically select and activate appropriate TCI state groups, allowing the system to adaptively optimize beam configuration in real-time, maintaining high productivity while minimizing harmful interference through dynamic adjustment
2Productivity
If beam configuration is optimized for multi-stream communication, then communication efficiency is improved, but system complexity increases
Solution Approach 1:
The patent creates a universal TCI state group structure that can serve multiple purposes: supporting both single-stream and multi-stream communication, accommodating different beam scenarios, and providing a framework for both initial access and data transmission. This multi-functional design improves communication efficiency across various scenarios while avoiding the need for separate complex configuration mechanisms for each case
Solution Approach 2:
The patent implements feedback mechanisms where the UE reports channel conditions and interference levels to the base station, which then selects and activates appropriate TCI state groups. This feedback-driven approach enables optimized beam configuration for multi-stream communication while simplifying system management by using automated decision-making based on reported conditions rather than complex manual configuration
Data Source
AI summary
Aspects relate to transmission configuration indicator (TCI) state configuration in multi-stream communication between a radio access network (RAN) entity and a user equipment (UE). The UE may obtain a respective beam quality metric for each transmit beam of a plurality of transmit beams associated with the RAN entity and transmit a beam report to the RAN entity including a respective beam quality metric for each of the transmit beams. The RAN entity may then group the plurality of transmit beams into a plurality of beam groups based on the beam report and transmit a plurality of TCI state groups, each corresponding to a respective one of the beam groups, to the UE.