Beam Failure Recovery in Multi-TRP 5G Networks
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Solution Overview
Problem
Current beam failure recovery procedures in 5G NR are not suitable for multi-TRP/panel transmission, leading to inefficiencies in maintaining communication links.
Innovation Solution
A method and device for determining beam failure and performing beam failure recovery in terminal devices, which involves configuring Physical Downlink Control Channels (PDCCHs) from multiple Transmission and Reception Points (TRPs), detecting beam failures, and switching to alternative TRPs for stable communication.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If traditional beam failure recovery procedure is used for single TRP/panel transmission, then the procedure is simple and easy to implement, but it is not suitable for multi-TRP/panel transmission scenarios
Solution Approach 1:
The patent segments the beam failure recovery procedure into separate handling for different TRPs/panels. Each TRP/panel is monitored independently with separate beam failure detection and recovery processes, allowing the system to handle multi-TRP scenarios by dividing the overall recovery task into manageable per-TRP units.
Solution Approach 2:
The patent extends the traditional single-TRP beam failure recovery procedure by adding a multi-TRP dimension. It introduces new parameters and configurations specific to multi-TRP operations, transforming the procedure from a single-dimension (single TRP) approach to a multi-dimensional framework that can handle multiple TRPs simultaneously.
2Reliability
If beam failure recovery is performed for multiple TRPs simultaneously, then communication reliability is improved, but the complexity of the recovery procedure increases
Solution Approach 1:
The patent applies segmentation by treating each TRP/panel as an independent monitoring and recovery unit. This allows the system to maintain high reliability through multi-TRP diversity while managing complexity by handling each TRP separately rather than as a monolithic system.
Solution Approach 2:
The patent implements preliminary action by pre-configuring beam failure recovery parameters and thresholds for each TRP/panel before actual operation. This preparation work is done in advance, so that when beam failure occurs, the recovery process can proceed efficiently without needing to make complex decisions in real-time.
3Measurement precision
If traditional beam failure detection method is used, then the detection process is simple, but it cannot effectively detect beam failures in multi-TRP transmission scenarios
Solution Approach 1:
The patent segments beam failure detection into separate processes for each TRP/panel. Each TRP has its own beam failure detection mechanism that independently monitors the quality of communication links, enabling precise detection of failures in specific TRPs without being confused by activities in other TRPs.
Solution Approach 2:
The patent introduces intermediary reference signals specifically configured for beam failure detection in multi-TRP scenarios. These reference signals act as intermediaries that facilitate accurate quality assessment between terminal and each TRP, enabling precise detection without direct complex measurements.
Data Source
AI summary
Embodiments of the present disclosure provide method, device and computer readable medium for beam failure recovery. In example embodiments, a method implemented at a terminal device is provided. The method comprises determining a configuration for receiving Physical Downlink Control Channels (PDCCHs) from a network device, the network device communicating with the terminal device via first and second Transmission and Reception Points (TRPs), wherein the configuration indicates which one of the first and second TRPs are the PDCCHs to be received from. The method further comprises determining whether a beam failure occurs in at least one of the first and second TRPs. In addition, the method further comprises, in response to determining that a beam failure occurs in at least one of the first and second TRPs, performing beam failure recovery (BFR) for the first and second TRPs at least based on the configuration.