MAC-CE Beam Failure Bitmap for TRP-Specific Recovery
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Solution Overview
Problem
In multi-TRP deployments, existing beam failure detection procedures cannot accurately identify which TRP is associated with a beam failure, leading to inefficient network resource utilization and communication issues.
Innovation Solution
The implementation of a multi-TRP BFR MAC-CE that includes a bitmap to indicate beam failure information for each TRP, allowing for TRP-specific beam recovery by distinguishing between first and second TRPs and indicating candidate beams associated with each.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If existing beam failure detection procedures are used in multi-TRP deployments, then beam failure detection is performed, but the system cannot accurately identify which TRP is associated with the beam failure
Solution Approach 1:
The beam failure detection information is segmented into TRP-specific components. The MAC-CE message is divided into multiple parts, each corresponding to a specific TRP, with each part containing beam failure detection information for that particular TRP. This segmentation allows the system to identify which specific TRP is experiencing beam failure while maintaining comprehensive monitoring of all TRPs.
2Reliability
If TRP-specific beam failure information is reported, then accurate TRP identification is achieved, but the signaling overhead and complexity increase
Solution Approach 1:
Multiple TRP-specific beam failure detection reports are merged into a single MAC-CE message structure. Instead of sending separate messages for each TRP, the invention combines all TRP-specific information into one unified message with a systematic structure that includes TRP identifiers and corresponding beam failure detection information for each TRP, reducing signaling overhead while maintaining reliability.
3Reliability
If comprehensive beam failure information for all TRPs is monitored, then system reliability is improved, but the processing overhead and resource utilization efficiency decrease
Solution Approach 1:
The beam failure detection mechanism applies local quality by treating each TRP independently with its own detection criteria and reporting structure. Each TRP's beam failure information is processed and reported with specific local characteristics, allowing the system to maintain high reliability through comprehensive monitoring while improving productivity by enabling targeted recovery actions only for affected TRPs rather than blanket system-wide processing.
Data Source
AI summary
Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may configure a medium access control control element (MAC-CE) to indicate beam failure information for one or more serving cells, wherein the beam failure information is associated with at least one of a first transmit-receive point (TRP) or a second TRP of the one or more serving cells. The UE may transmit the MAC-CE to a base station via at least one serving cell. Numerous other aspects are provided.