Multi-TRP Beam Failure Recovery for Partial Beam Blocking
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Solution Overview
Problem
In high-frequency communication, signal energy decreases sharply with distance, leading to short transmission distances and beam failures due to obstacles, and existing 5G systems struggle with beam failure recovery in multi-TRP scenarios.
Innovation Solution
A method for beam failure recovery that enables TRP-level and cell-level recovery, using N sets of beam failure detection and candidate resources, allowing for partial and comprehensive recovery, enhancing system evolution and performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Length of moving object
If analog beam technology is used to concentrate signal energy, then transmission distance is improved, but beam coverage area becomes narrow making it easily blocked by obstacles
Solution Approach 1:
The patent segments the beam failure recovery process into multiple independent TRP-level recovery mechanisms. Each TRP has its own beam failure detection resources and candidate beam resources, allowing independent recovery operations. This segmentation enables the system to maintain transmission through alternative TRPs when one beam is blocked, resolving the contradiction between narrow beam coverage and obstacle blocking.
2Reliability
If cell-level beam failure recovery is implemented, then overall system reliability is improved, but recovery time and service continuity are worsened due to comprehensive recovery requirements
Solution Approach 1:
The patent divides the cell-level recovery process into multiple TRP-level recovery processes. Each TRP can independently detect beam failures and initiate recovery using its own candidate beams. This allows partial recovery without requiring complete cell-level recovery, reducing recovery time while maintaining overall system reliability through parallel operations.
Solution Approach 2:
The patent enables partial beam failure recovery at the TRP level without requiring complete cell-level recovery. When a beam failure occurs at one TRP, the system can perform recovery only for that specific TRP using available candidate resources, rather than waiting for or requiring recovery of all TRPs. This partial action approach significantly reduces recovery time while maintaining sufficient system reliability.
3Productivity
If multiple TRP-level beam failure recovery mechanisms are added, then service continuity is improved, but device complexity and configuration requirements increase
Solution Approach 1:
The patent designs a universal beam failure recovery framework that can operate at both cell level and TRP level. The same basic mechanism of configuring beam failure detection resources and candidate beam resources applies to both recovery scenarios. This multi-functionality allows the system to handle different recovery requirements without proportionally increasing complexity, as the core structure remains consistent across both levels.
4Reliability
If N sets of beam failure detection resources and candidate resources are configured, then TRP-level recovery capability is improved, but measurement and detection complexity increases
Solution Approach 1:
The patent segments the beam quality measurement process into independent TRP-level measurements. Each TRP has its own dedicated beam failure detection resources and candidate beam resources, allowing measurements to be performed locally and independently. This segmentation enables parallel measurement operations across multiple TRPs, reducing the overall detection complexity compared to a centralized cell-level measurement approach, while improving TRP-level recovery capability.
Data Source
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AI summary
This application provides a beam failure recovery method, an apparatus, and a system. In this solution, a terminal device receives first configuration information from a network device, and performs cell-level beam failure recovery or transmission reception point TRP-level beam failure recovery based on the first configuration information. The first configuration information is used to configure a plurality of sets of beam failure detection resources and a plurality of sets of candidate beam resources. Based on this solution, the terminal device may perform partial beam failure recovery based on the plurality of sets of beam failure detection resources and the plurality of sets of candidate beam resources, so that the terminal device can detect a TRP-level beam failure and recover the TRP-level beam failure in time. Alternatively, the terminal device may perform cell-level beam failure recovery based on the plurality of sets of beam failure detection resources and the plurality of sets of candidate beam resources, so that the TRP-level beam failure recovery and the cell-level beam failure recovery are compatible with each other. This effectively improves smooth system evolution.