Multi-Beam TCI State Mapping for Layered 5G NR Links
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Solution Overview
Problem
Existing wireless communication systems face challenges in efficiently managing multi-beam operations in 5G/NR systems, particularly in handling multiple layers and beams for downlink and uplink channels, especially in complex environments with varying path conditions.
Innovation Solution
A multi-beam downlink and uplink wireless system is implemented, where user equipment (UE) and base stations (BS) utilize transmission configuration indication (TCI) states and corresponding TCI state identifiers to determine spatial domain filters for reception and transmission of layers, enabling efficient beam management and alignment across multiple beams.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple TCI states and spatial domain filters are configured for multi-beam operation, then beamforming gain and communication reliability are improved, but system complexity and processing overhead increase
Solution Approach 1:
The patent segments the TCI state configuration into separate components: first TCI states for downlink channels and second TCI states for uplink channels. Each TCI state is further divided into spatial domain filter parameters that can be independently configured and applied. This segmentation allows the system to manage multiple beams and layers without overwhelming complexity, as each segment can be processed and applied independently.
Solution Approach 2:
The patent creates a universal TCI state configuration mechanism that serves multiple functions simultaneously. The same TCI state framework is used to configure both downlink and uplink channels, supporting multiple layers and beams across different communication directions. This multi-functionality reduces overall system complexity by reusing the same configuration structure rather than requiring separate mechanisms for each function.
2Measurement precision
If layer-specific TCI states are assigned for multi-layer downlink channels, then spatial domain filter precision is improved, but configuration information overhead increases
Solution Approach 1:
The patent applies local quality by assigning specific TCI states to specific layers based on their individual spatial domain filter requirements. Each layer can have its own TCI state configuration tailored to its specific spatial filtering needs, allowing precise control over each layer's beamforming characteristics. This localized approach ensures that each layer receives the appropriate spatial domain filter precision without requiring all layers to use overly complex configurations.
Solution Approach 2:
The patent implements partial action by configuring TCI states selectively rather than universally for all layers. The system determines which layers require layer-specific TCI states based on actual communication needs and channel conditions. This selective configuration approach provides precise spatial domain filtering where needed while avoiding unnecessary configuration overhead for layers that can use more generic settings.
Data Source
AI summary
Methods and apparatuses for a multi-beam downlink and uplink wireless system. A method of a user equipment includes receiving configuration information for one or more transmission configuration indication (TCI) states and corresponding TCI state identifiers (IDs) and receiving one or more TCI state IDs. The method also includes determining, based on the one or more TCI state IDs, at least one of one or more first spatial domain filters for reception of one or more layers, respectively, of a downlink channel and one or more second spatial domain filters for transmission of one or more layers, respectively, of an uplink channel. The method further includes at least one of receiving the one or more layers of the downlink channel using the one or more first spatial domain filters, respectively, and transmitting the one or more layers of the uplink channel using the one or more second spatial domain filters, respectively.


