BWP Switching During Beam Failure Recovery
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current wireless communication systems face challenges in efficiently managing beam failure recovery procedures, particularly in multicarrier communication systems, where existing methods lack effective mechanisms to switch between bandwidth parts (BWP) during beam failure recovery.
Innovation Solution
A method is introduced that involves starting a BWP inactivity timer when switching to a first active BWP, initiating a beam failure recovery procedure, and upon timer expiry, switching to a second BWP and aborting the recovery procedure, allowing for dynamic BWP management during beam failure recovery.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If beam failure recovery procedure is initiated for the first BWP, then communication reliability is improved, but switching to a second BWP upon timer expiry causes the recovery procedure to be aborted
Solution Approach 1:
The patent implements dynamic BWP switching during beam failure recovery by introducing a timer mechanism that allows the system to transition from a first BWP to a second BWP based on elapsed time. The MAC entity monitors the timer and dynamically adjusts the active BWP, enabling adaptive recovery strategies that can switch between different bandwidth parts to restore communication reliability while managing recovery procedure timing effectively
2Productivity
If BWP inactivity timer is started based on switching to first BWP, then BWP management efficiency is improved, but timer expiry during recovery procedure forces abandonment of the recovery process
Solution Approach 1:
The patent applies preliminary action by starting the BWP inactivity timer immediately when switching to the first BWP, before the beam failure recovery procedure completes. This pre-established timer provides a predetermined time threshold that triggers BWP switching, allowing the system to proactively manage BWP resources and prevent indefinite suspension of recovery procedures while maintaining structured recovery timelines
Data Source
Figure 1
Figure 2A~2B
Figure 3
AI summary
A wireless device receives one or more messages comprising configuration parameters. The configuration parameters indicate: a plurality of bandwidth parts (BWPs) comprising a first BWP and a second BWP; and a timer value for a BWP inactivity timer. The BWP inactivity timer associated with the timer value starts in response to switching to the first BWP as an active BWP. A beam failure recovery procedure is initiated based on reaching a number of beam failure instance indications for the first BWP. Based on an expiry of the BWP inactivity timer during the beam failure recovery procedure: the beam failure recovery procedure for the first BWP is aborted; and the active BWP is switched from the first BWP to the second BWP.