Sidelink TCI State Configuration for UE Autonomy
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Solution Overview
Problem
Current wireless communication systems face challenges in configuring sidelink transmission configuration indicator (TCI) states for sidelink channels between user equipment (UEs) without relying on base station information, which affects the quality and efficiency of sidelink communications.
Innovation Solution
User equipment (UEs) are enabled to transmit and receive sidelink configuration information, including TCI states, to autonomously configure sidelink channels, allowing them to select optimal beams for communication, thereby improving sidelink communication quality and reducing signaling overhead.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If UEs autonomously configure sidelink TCI states without base station information, then sidelink communication quality and spectral efficiency are improved, but device complexity and signaling overhead increase
Solution Approach 1:
The patent enables UEs to autonomously determine and configure TCI states for sidelink channels by self-measuring channel conditions and selecting appropriate beam pairs without requiring base station intervention. The UE independently performs channel quality measurements, identifies suitable TCI states from a codebook, and applies them to sidelink transmissions, thereby achieving self-service configuration that improves communication efficiency while managing device complexity through standardized procedures
Solution Approach 2:
The patent introduces a codebook-based approach where UEs select TCI states by changing parameters such as beam directions, spatial filters, and reference signal configurations. By pre-defining a set of TCI state parameters in the codebook and allowing UEs to select appropriate combinations based on channel conditions, the system enables flexible parameter adaptation that improves sidelink quality without requiring complex real-time configuration from the base station
2Reliability
If UEs perform extensive channel condition estimation, then communication reliability is improved, but power consumption increases
Solution Approach 1:
The patent implements a balanced channel estimation approach where UEs perform measurements on selected reference signals corresponding to candidate TCI states rather than exhaustive measurements of all possible channels. By using the codebook structure to limit the search space to relevant beam pairs and performing partial channel quality indicators (CQI) measurements only on promising candidates, the system achieves sufficient reliability for sidelink communication while avoiding the excessive power consumption of complete channel characterization
Solution Approach 2:
The patent enables UEs to perform preliminary channel assessments using pre-configured reference signals and TCI state candidates before actual sidelink data transmission. By conducting initial channel quality measurements and TCI state selections in advance, the system prepares the necessary configuration information ahead of time, reducing the need for repeated extensive measurements during active communication and thereby lowering overall power consumption while maintaining reliability
Data Source
AI summary
In some implementations, a user equipment (UE) may transmit, to a second UE, sidelink configuration information indicating one or more transmission configuration indicator (TCI) states for at least one sidelink channel between the first UE and the second UE.