Beam Failure Recovery Request Aggregation for 5G UE Signaling

Resolve Bottlenecks,
Find Innovative SolutionsGenerate Solutions

Solution Overview

Problem

Current wireless communication systems face inefficiencies in managing beam failures across multiple cells, leading to excessive signaling overhead and resource consumption due to frequent beam failure recovery requests (BFRQ) in 5G and LTE networks.

Innovation Solution

Implementing a method in user equipment (UE) to detect beam failures and selectively transmit BFRQ communications only after a threshold time period has elapsed since the previous BFRQ transmission, thereby reducing unnecessary communications and conserving resources.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If the UE transmits BFRQ communications for each detected beam failure in multiple cells, then the beam failure recovery reliability is improved, but the signaling overhead and resource consumption increase excessively

Engineering Contradiction:

Improvebeam failure recovery reliabilityVSAvoidsignaling overhead and resource consumption

Core Design Contradiction:

ReliabilityVSLoss of energy

Solution Approach 1:

The patent combines multiple BFRQ transmissions for different cells into a single aggregated BFRQ message that reports beam failures across multiple cells simultaneously. This merging approach maintains comprehensive beam failure recovery coverage while significantly reducing the number of separate signaling transmissions required.

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The patent creates a universal BFRQ mechanism that handles beam failure reporting for multiple cells through a single standardized procedure. This multi-functional approach allows one BFRQ transmission to serve multiple cells, eliminating the need for cell-specific BFRQ transmissions and reducing overall signaling overhead.

Inventive Principle:

Principle #6Universality (Multi-functionality)

2Speed

If the UE transmits BFRQ communications frequently for beam failure recovery, then the recovery speed is improved, but the resource consumption and network interference increase

Engineering Contradiction:

Improverecovery speedVSAvoidresource consumption

Core Design Contradiction:

SpeedVSQuantity of substance

Solution Approach 1:

The patent merges multiple rapid BFRQ transmissions into a single aggregated message that captures the essence of multiple failure events. This approach preserves the speed of response by immediately reporting failures while avoiding the resource exhaustion that would result from transmitting each failure separately at high frequency.

Inventive Principle:

Principle #5Merging (Combining)

3Measurement precision

If the UE transmits multiple BFRQ communications for different cells, then the beam failure detection accuracy is improved, but the device complexity and processing overhead increase

Engineering Contradiction:

Improvebeam failure detection accuracyVSAvoiddevice complexity and processing overhead

Core Design Contradiction:

Measurement precisionVSDevice complexity

Solution Approach 1:

The patent combines the detection and reporting functions for multiple cells into a unified process. The UE maintains accurate beam failure detection for each individual cell while aggregating the results into a single comprehensive BFRQ message, thereby preserving detection accuracy while reducing processing complexity compared to handling multiple separate reporting procedures.

Inventive Principle:

Principle #5Merging (Combining)

Data Source

PatentUS11616557B2Indicating beam failure for multiple cells

Publication Date: 2023.03.28 QUALCOMM INC

AI summary

Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may detect a beam failure associated with a cell of a plurality of cells. The UE may selectively transmit a beam failure recovery request (BFRQ) communication for the cell based at least in part on a determination of whether a threshold time period has elapsed since a previous BFRQ communication was transmitted for the cell or another cell of the plurality of cells. Numerous other aspects are provided.