Unified TCI State Switching for Beam Management Overhead
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Solution Overview
Problem
The inconsistency in user equipment capabilities and overheads between different NR communication protocol versions, specifically regarding unified TCI state modes that support either single or multiple transmission reception points, leads to inefficiencies in beam management.
Innovation Solution
A method and communication device for switching between two unified TCI state modes, corresponding to different communication protocol versions, using signaling such as RRC, MAC CE, and DCI to manage unified TCI states effectively, supporting both single and multiple transmission reception points.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a unified TCI state mode of a first version is used to support multiple transmission reception points (MTRPs) transmission, then the transmission capability is improved, but the overhead becomes relatively large
Solution Approach 1:
The patent implements dynamic switching between different unified TCI state modes (first version supporting MTRP with higher overhead, second version with lower overhead) based on current transmission requirements. The network device receives indication information to determine which mode to use, allowing the system to adaptively adjust the TCI state mode to balance transmission capability and overhead efficiency
Solution Approach 2:
The patent changes the operational parameters of the TCI state mode by switching between different protocol versions. The first unified TCI state mode uses parameters optimized for MTRP support with higher overhead, while the second mode uses parameters optimized for reduced overhead. This parameter switching allows the system to optimize performance based on specific transmission scenarios
2Quantity of substance
If a unified TCI state mode of a second version is used to reduce overhead, then the overhead efficiency is improved, but the transmission capability is limited to single transmission reception point (STRP)
Solution Approach 1:
The system dynamically switches between the second unified TCI state mode (optimized for low overhead STRP transmission) and the first unified TCI state mode (optimized for MTRP transmission) based on indication information from the network device. This dynamic adaptation allows the system to achieve low overhead when STRP is sufficient while maintaining the capability to switch to higher capability modes when MTRP transmission is required
Solution Approach 2:
The patent creates a universal TCI state management system that can operate in multiple modes (both first and second version modes) to serve different transmission requirements. By incorporating both modes into a single switching framework, the system achieves multi-functionality, handling both STRP and MTRP scenarios with appropriate overhead optimization for each case
3Adaptability or versatility
If different communication protocol versions are used for unified TCI state modes, then the versatility of the system is improved, but the device complexity increases
Solution Approach 1:
The patent introduces indication information as an intermediary mechanism that mediates between different protocol versions. The network device sends indication information to the terminal device, which acts as a mediator to trigger the appropriate TCI state mode switching. This intermediary approach simplifies the complexity by providing a unified switching mechanism rather than requiring separate handling logic for each protocol version
Data Source
AI summary
Provided is a method for switching a TCI state mode. The method is performed by a terminal device. The method includes: receiving signaling, wherein the signaling is used to indicate switching between two unified TCI state modes, wherein the two unified TCI state modes include a first unified TCI state mode and a second unified TCI state mode, wherein the first unified TCI state mode corresponds to a communication protocol of a first version, and the second unified TCI state mode corresponds to a communication protocol of a second version, the first version being different from the second version.