Multi-Beam Beam Failure Recovery for Reliable Control Signaling

Resolve Bottlenecks,
Find Innovative SolutionsGenerate Solutions

Solution Overview

Problem

Existing wireless communication systems face challenges in ensuring reliable beam failure recovery and control information transmission due to increased device capabilities, which can strain battery life and reduce communication efficiency.

Innovation Solution

Implementing multiple physical downlink control channel repetitions with different beam configurations and utilizing multiple candidate beams for beam failure recovery, including physical random access channel resources and transmission configuration indicator indexes, to enhance reliability and robustness.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If multiple physical downlink control channel repetitions with different beam configurations are implemented, then reliability of control information transmission is improved, but device complexity increases

Engineering Contradiction:

Improvereliability of control information transmissionVSAvoiddevice complexity

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The patent segments the control information transmission into multiple repetitions, each using different beam configurations. The base station transmits the same control information multiple times through different beams (e.g., first beam, second beam, third beam), allowing the wireless device to receive and combine multiple versions. This segmentation approach improves reliability by providing diversity in transmission paths while managing complexity through structured repetition patterns.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The patent implements multi-functionality by enabling the physical downlink control channel to serve multiple purposes through beam failure recovery mechanisms. The same control channel structure is used for both normal communication and beam failure recovery scenarios, with the wireless device capable of detecting beam failures and using alternative beams for recovery without requiring separate dedicated recovery channels.

Inventive Principle:

Principle #6Universality (Multi-functionality)

2Reliability

If multiple candidate beams are used for beam failure recovery, then robustness of beam failure recovery operations is improved, but loss of time increases

Engineering Contradiction:

Improverobustness of beam failure recoveryVSAvoidtime for beam failure recovery

Core Design Contradiction:

ReliabilityVSLoss of time

Solution Approach 1:

The patent applies preliminary action by pre-configuring multiple candidate beams and their associated resources before beam failure occurs. The base station provides the wireless device with information about multiple candidate beams and their corresponding physical downlink control channel repetitions in advance. When beam failure is detected, the wireless device can immediately switch to using alternative pre-configured beams for recovery, reducing the time needed for beam failure recovery operations.

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The patent ensures continuity of useful action by maintaining multiple active beam configurations that can be seamlessly switched between. The wireless device continuously monitors beam quality and can transition from the primary beam to alternative beams without interruption to data transmission. The control channel repetitions continue to be transmitted across multiple beams, ensuring continuous communication coverage even when one beam fails.

Inventive Principle:

Principle #20Continuity of useful action

3Reliability

If multiple physical random access channel resources are used for beam failure recovery request, then reliability of beam failure recovery is improved, but use of energy increases

Engineering Contradiction:

Improvereliability of beam failure recoveryVSAvoidenergy consumption of wireless device

Core Design Contradiction:

ReliabilityVSUse of energy by moving object

Solution Approach 1:

The patent implements dynamics by enabling the wireless device to adaptively select which beam resources to use based on real-time conditions. Rather than continuously monitoring all possible beams, the device dynamically determines which alternative beams are most likely to succeed based on current signal conditions and network configuration. This dynamic approach allows the device to maintain high reliability through multiple candidate beams while reducing energy consumption by focusing monitoring and transmission efforts on the most promising beams.

Inventive Principle:

Principle #15Dynamics

Data Source

PatentUS12506531B2Reliability for beam failure recovery and search space and control resource set index 0

Publication Date: 2025.12.23 APPLE INC

AI summary

This disclosure relates to techniques for performing beam failure recovery and receiving control information with improved reliability in a wireless communication system. The techniques may include the use of multiple beams in conjunction with performing beam failure recovery, for example including identifying multiple candidate beams for beam failure recovery. The techniques may also or alternatively include the use of multiple beams to provide repetitions of control information for search space and control resource set index 0.