Per-TRP PUCCH Beam Failure Recovery Configuration
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Solution Overview
Problem
Current wireless communication systems, particularly in 5G NR and LTE, face challenges in efficiently recovering from beam failures, leading to reduced reliability and communication efficiency due to the need to wait for all beams to weaken before initiating recovery procedures.
Innovation Solution
Implementing per-transmission reception point (per-TRP) based beam failure recovery (BFR) methods, which allow for separate beam failure detection and recovery for each TRP, enabling recovery without waiting for other TRPs to weaken, and configuring physical uplink control channel (PUCCH) BFR for TRP-specific recovery.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional beam failure recovery procedures are used, then system stability is maintained, but recovery time increases and communication efficiency decreases
Solution Approach 1:
The patent segments the beam failure recovery process by introducing per-TRP (Transmission Reception Point) specific BFR mechanisms. Instead of treating all beams uniformly, the system divides beam groups associated with different TRPs and enables independent failure detection and recovery for each TRP. This segmentation allows the UE to initiate recovery procedures for a specific TRP without waiting for other TRPs to experience beam failures, thereby reducing overall recovery time while maintaining system stability.
Solution Approach 2:
The patent implements preliminary action by configuring the UE with beam group specific BFR SR (Scheduling Request) resources in advance. When a beam failure is detected in a specific TRP's beam group, the UE can immediately transmit a BFR SR using the pre-configured resources, eliminating the need to wait for all beams to weaken. This preliminary configuration enables faster recovery initiation and reduces the time loss associated with traditional recovery procedures.
2Productivity
If per-TRP BFR is implemented, then communication efficiency improves, but device complexity increases
Solution Approach 1:
The patent applies segmentation by dividing the BFR configuration into per-TRP components. Each TRP has its own beam group and associated BFR resources configured independently. This segmentation allows the UE to manage beam failure recovery for each TRP separately, improving communication efficiency by enabling parallel recovery operations. The complexity is managed through structured configuration where each segment (TRP) has dedicated parameters and resources.
Solution Approach 2:
The patent implements local quality by assigning TRP-specific BFR parameters and resources to each Transmission Reception Point. Instead of using a uniform BFR configuration for all TRPs, the system tailors the BFR mechanism to local TRP conditions, including TRP-specific beam groups, SR resources, and failure detection thresholds. This localized approach optimizes communication efficiency for each TRP while keeping the overall system manageable through modular configuration.
3Reliability
If beam failure detection sensitivity is increased, then reliability improves, but false detection rate increases
Solution Approach 1:
The patent applies local quality by configuring beam failure detection parameters specific to each TRP's beam group. Each TRP has its own detection thresholds and criteria tailored to its operational characteristics. This localized detection approach improves reliability by adapting sensitivity to local conditions while reducing false detections that would occur with uniform high-sensitivity settings across all TRPs. The system can distinguish between genuine beam failures and temporary degradations based on TRP-specific parameters.
Solution Approach 2:
The patent implements preliminary action by pre-configuring beam failure detection parameters and thresholds for each TRP before operation begins. The UE is provided with TRP-specific BFR configuration information including detection criteria and tolerance levels. This preliminary configuration enables reliable beam failure detection without excessive sensitivity, as the thresholds are optimized in advance based on each TRP's characteristics, preventing false detections while maintaining high detection accuracy.
Data Source
AI summary
Certain aspects provide enhancements to enable per transmission reception point (per-TRP) based beam failure recovery (BFR), and more particularly, techniques for configuring physical uplink control channel (PUCCH) BFR for TRP specific BFR. A method that may be performed by a user equipment (UE) includes communicating with at least two TRPs using beams associated with at least two beam groups, each of the beams groups associated with one of the TRPs, detecting a beam failure in a beam group of the at least two beam groups, transmitting a beam group specific BFR scheduling request (SR), in accordance with one or more rules, for an uplink (UL) grant to transmit a beam failure recovery request (BFRQ) specific to the beam group in which the beam failure was detected, receiving the UL grant in response to the SR, and transmitting the BFRQ specific to the beam group based on the UL grant.