Beam State Determination for Flexible 5G NR Updates
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Solution Overview
Problem
Current 5G NR technology lacks a flexible beam update mechanism to effectively manage beam pairs between base stations and user equipment in high frequency bands, especially in multi-TRPs/multi-panels scenarios, leading to inadequate signal coverage and stability.
Innovation Solution
A wireless communication method that involves receiving beam state information from a network node, determining a second beam state or reference signal based on the initial beam state, and applying it to communicate target signals, allowing for flexible beam updates and improved coverage in high frequency bands.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If beam mode transmission is used to improve coverage in high frequency bands, then signal coverage is improved, but beam pair changes frequently requiring complex beam update mechanisms
Solution Approach 1:
The patent applies universality by creating a unified beam indication framework that handles multiple channels (PDSCH, PUSCH, PDCCH, PUCCH) and multiple scenarios (single-TRP, multi-TRP, multi-panel) through a common mechanism. The TCI state and spatial relation information structures serve universal purposes across different channel types and transmission scenarios, eliminating the need for separate beam management mechanisms for each case.
Solution Approach 2:
The patent implements dynamics through flexible beam update mechanisms where beam states can be dynamically switched based on channel conditions, mobility requirements, and network configurations. The system allows dynamic selection between different beam indication methods (TCI states, spatial relation information) and supports rapid beam switching via MAC CE and DCI commands to adapt to changing beam pair conditions in high frequency bands.
2Device complexity
If basic beam mechanism is used for single panel/single TRP, then implementation is simple, but it cannot indicate beams for multiple channels and multi-panels/multi-TRPs scenario
Solution Approach 1:
The patent extends the basic beam mechanism into a universal framework where TCI states and spatial relation information can indicate beams for any combination of channels, panels, and TRPs. The unified structure allows a single beam indication mechanism to serve multiple functions across single-TRP, multi-TRP, multi-panel, and multi-channel scenarios without requiring separate mechanisms for each case.
Solution Approach 2:
The patent applies segmentation by dividing the beam state indication into modular components: TCI states for downlink, spatial relation information for uplink, and configurable associations between them. This segmented structure allows independent configuration and management of beam states for different channels and TRPs while maintaining overall coherence through the unified framework.
3Measurement precision
If frequent beam updates are performed to track beam pair changes, then beam accuracy is improved, but signaling overhead increases
Solution Approach 1:
The patent applies preliminary action by pre-configuring TCI states and spatial relation information through RRC signaling before actual beam updates are needed. This preliminary configuration establishes a pool of available beam states that can be quickly activated through compact MAC CE or DCI commands, avoiding the need for frequent full beam state transmissions and reducing ongoing signaling overhead while maintaining beam accuracy.
Solution Approach 2:
The patent uses copying by allowing beam states to be referenced and reused across multiple channels and TRPs through TCI state links and spatial relation information associations. Instead of independently signaling beam parameters for each channel, the system creates references to shared beam state definitions, significantly reducing redundant signaling while maintaining precise beam indication for all channels.
Data Source
AI summary
A wireless communication method for use in a wireless terminal is disclosed. The wireless communication method comprises receiving, from a wireless network node, first command information comprising a first beam state, determining at least one of a second beam state or a second reference signal based on the first beam state, and communicating, with the wireless network node, a target signal by applying at least one of the second beam state or the second reference signal.