Beam Indication Channel for Dynamic Spatial Filter Alignment
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Solution Overview
Problem
Current wireless communication systems, particularly in 5G/NR, face challenges in efficiently managing beam indication channels in multi-beam systems, which affects the accuracy and reliability of beamforming and resource allocation, especially in dynamic and dispersive multi-path environments.
Innovation Solution
The implementation of a beam indication channel that conveys transmission configuration indication (TCI) state IDs, allowing user equipment (UE) and base stations to determine and apply spatial domain filters for downlink and uplink channels, enabling dynamic beam management and alignment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If beam indication channels are used to convey TCI state IDs in multi-beam systems, then beamforming accuracy and spatial domain filtering are improved, but system complexity and processing overhead increase
Solution Approach 1:
The beam indication channel is segmented into multiple components: TCI state configuration messages, TCI state ID indicators, and spatial domain filter parameters. This segmentation allows the system to manage complex beamforming operations through modular, manageable units that can be processed independently, reducing overall system complexity while maintaining beamforming accuracy.
Solution Approach 2:
TCI states and their associated spatial domain filters are pre-configured and stored in both the base station and user equipment before actual beamforming operations. This preliminary action allows the system to quickly select and apply pre-computed beam parameters during dynamic beam switching, reducing real-time processing complexity while maintaining high beamforming precision.
2Reliability
If dynamic beam adjustments are implemented through beam indication channels, then communication reliability in dispersive environments is improved, but processing time and signaling overhead increase
Solution Approach 1:
Multiple TCI states representing different beam configurations are pre-configured in advance, allowing the system to rapidly switch between pre-computed beam options without performing complex calculations in real-time. This enables dynamic beam adjustment for reliability while minimizing processing time delays.
Solution Approach 2:
The system implements feedback mechanisms where channel quality indicators and beam performance metrics are continuously monitored and reported back to the base station. This feedback enables adaptive selection of optimal TCI states, improving communication reliability in dispersive environments while maintaining efficient processing through automated decision-making based on pre-configured parameters.
3Productivity
If multiple TCI states are configured for downlink and uplink channels, then resource allocation efficiency is improved, but configuration complexity and signaling overhead increase
Solution Approach 1:
The TCI state configuration framework is designed to be universal, supporting both downlink and uplink channels through a common set of TCI states and spatial domain filters. This multi-functionality allows the same configuration mechanism to serve multiple purposes (DL and UL beam management), improving resource allocation efficiency across different channel types while avoiding the need for separate configuration systems that would increase complexity.
Solution Approach 2:
The patent merges the configuration of downlink and uplink beam parameters into a unified TCI state structure, where spatial domain filters and beam parameters are combined into single configurable entities. This consolidation reduces the number of separate configuration messages and parameters needed, improving resource allocation efficiency while reducing overall configuration complexity through integration.
Data Source
AI summary
Methods and apparatuses for beam indication channel in a multi-beam system. A method of operating a user equipment includes receiving configuration information for one or more transmission configuration indication (TCI) states, associated TCI state identifiers (IDs), and a channel conveying one or more TCI state IDs and receiving the channel conveying the one or more TCI state IDs. The method also includes determining, based on the one or more TCI state IDs, one or more spatial domain filters for at least one of reception of downlink channels and transmission of uplink channels and determining a time for applying the one or more spatial domain filters. Additionally, the method includes at least one of: receiving, starting at the determined time, the downlink channels using the one or more spatial domain filters; and transmitting, starting at the determined time, the uplink channels using the one or more spatial domain filters.