Radio link failure (RLF) avoidance

By employing a control mechanism in UE to detect poor uplink channel conditions and transmit reference signals, the solution addresses RLF challenges, reducing service outages and improving communication reliability through rapid channel recovery.

WO2026128084A1 Publication Date: 2026-06-18QUALCOMM INC
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Patent Information

Application Number
PCT/US2025/051305
Authority / Receiving Office
WO · WO
Patent Type
Applications
Current Assignee / Owner
Priority Date
2024-12-09
Filing Date
2025-10-16
Publication Date
2026-06-18

AI Technical Summary

Technical Problem

Wireless communication systems face challenges in efficiently detecting and mitigating radio link failures (RLF) to reduce service outages, particularly in uplink channels with deteriorating conditions, which can be time-consuming and disruptive.

Method used

Implementing a control mechanism in user equipment (UE) to trigger an RLF recovery procedure by detecting poor uplink channel conditions using a retransmission counter and transmitting a reference signal, such as a sounding reference signal (SRS), allowing the network to initiate mitigation processes like handover or beamforming to improve channel conditions.

Benefits of technology

This approach reduces service outages by enabling early detection and rapid recovery of uplink channel conditions, enhancing communication reliability and efficiency.

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Abstract

A wireless node may one or more memories, individually or in combination, having instructions. A wireless node may one or more processors, individually or in combination, configured to execute the instructions and cause the wireless node to: output, for transmission via a link, signaling comprising a first protocol data unit (PDU); and output, for transmission, a reference signal, the output being based on satisfaction of a first condition associated with a signal quality metric associated with the link.
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