Beam Failure Recovery Initiation for DRX-Inactive Terminals
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Solution Overview
Problem
In wireless communication systems with DRX operation, the behavior of a terminal device during beam failure recovery (BFR) in a DRX inactive state is uncertain, leading to potential power consumption inefficiencies and unclear protocol integrity.
Innovation Solution
A method for a terminal device to judge whether to delay or immediately initiate a BFR procedure based on beam failure occurrence in a DRX inactive state, using QoS parameters and timing considerations to determine an optimal initiation time point for the BFR.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the terminal device immediately initiates BFR procedure upon beam failure detection during DRX inactive state, then communication reliability is improved, but power consumption increases due to unnecessary wake-up
Solution Approach 1:
The terminal device performs preliminary judgment about beam failure recovery necessity before actually initiating the recovery procedure. It evaluates whether the beam failure truly requires recovery or if it can be tolerated, and only initiates BFR when necessary. This preliminary assessment prevents unnecessary wake-ups and procedure initiations during DRX inactive state, reducing power consumption while maintaining communication reliability when actually needed.
2Use of energy by moving object
If the terminal device delays BFR initiation until DRX active state, then power consumption is reduced, but communication reliability deteriorates due to delayed recovery
Solution Approach 1:
The terminal device dynamically adjusts its BFR initiation strategy based on the DRX state and beam failure characteristics. During DRX active state, it can immediately initiate BFR for fast recovery. During DRX inactive state, it performs preliminary judgment and only initiates BFR when necessary. This dynamic adaptation allows the system to balance power consumption and communication reliability according to actual conditions, rather than following a fixed rule.
3Measurement precision
If the terminal device monitors control channel continuously, then beam failure detection accuracy is improved, but power consumption increases
Solution Approach 1:
The terminal device employs periodic monitoring of the control channel during DRX operation, alternating between active monitoring periods and sleep periods. During DRX active state, it monitors continuously for accurate beam failure detection. During DRX inactive state, it reduces monitoring or performs only preliminary judgments. This periodic action pattern maintains detection accuracy when needed while significantly reducing power consumption during inactive periods.
Data Source
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AI summary
The present disclosure provides a beam failure recovery method, a beam failure recovery device and a terminal device. The beam failure recovery method includes: judging whether it is necessary to delay initiating a BFR procedure when a beam failure occurs for the terminal device in a DRX inactive state; directly initiating, by the terminal device, the BFR procedure when it is unnecessary to delay initiating the BFR procedure; and determining an initiation time point for the BFR procedure when it is necessary to delay initiating the BFR procedure, and initiating the BFR procedure at the initiation time point.