mTRP Beam Failure Indication With TRP-Specific MAC Bits
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Solution Overview
Problem
Current wireless communication networks lack efficient mechanisms for indicating beam failure in multiple transmission reception point (mTRP) operations, particularly when multiple beams or TRPs fail, leading to incomplete recovery strategies.
Innovation Solution
Incorporating beam failure indication data into a Medium Access Control (MAC) control element (CE) with specific bit values to indicate beam failure on individual TRPs, including candidate beam information, and transmitting this data to an access point to facilitate effective beam failure recovery.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If beam failure indication is not provided for individual TRPs, then the system complexity is reduced, but the reliability of beam failure recovery deteriorates due to incomplete failure information
Solution Approach 1:
The beam failure indication is segmented by introducing separate bit fields for different TRPs within the MAC CE. Each TRP has its own indication bit, allowing independent failure detection and reporting for each transmission reception point, thereby improving recovery reliability without overwhelming system complexity
Solution Approach 2:
The MAC CE structure is enhanced with TRP-specific quality information including individual beam failure indication bits, candidate beam IDs, and beam quality metrics for each TRP. This localized quality reporting enables precise failure identification and targeted recovery actions for specific TRPs
2Measurement precision
If detailed beam failure indication data is included for each TRP, then the measurement precision of failure detection is improved, but the loss of information transmission increases due to larger MAC CE size
Solution Approach 1:
The MAC CE includes beam failure indication bits and candidate beam information only for TRPs where failures are actually detected, rather than forcing complete TRP information for all TRPs. This partial action approach maintains high detection precision for failed TRPs while minimizing unnecessary information transmission overhead
Solution Approach 2:
The beam failure indication structure uses a nested organization where TRP-level indication bits are embedded within the MAC CE, and candidate beam information is nested within each TRP's failure indication. This hierarchical nesting allows efficient packing of detailed failure information while maintaining compact MAC CE structure
3Productivity
If beam failure recovery is delayed, then the device complexity is reduced, but the productivity of wireless communication deteriorates due to prolonged connection loss
Solution Approach 1:
The system pre-configures candidate beam information and TRP-specific parameters before beam failure occurs. When failure is detected, the MAC CE can immediately report the pre-identified candidate beams for each failed TRP, enabling the access point to rapidly switch to alternative beams without extensive real-time analysis, thus accelerating recovery while managing complexity
Solution Approach 2:
The beam failure indication mechanism provides immediate feedback to the access point through the MAC CE, including specific TRP failure status and candidate beam recommendations. This feedback loop enables the access point to quickly adjust transmission parameters and switch to alternative beams, significantly reducing recovery time and maintaining high communication productivity
Data Source
AI summary
Disclosed is a method comprising detecting a beam failure on at least one transmission reception point of a plurality of transmission reception points. One or more beam failure indication data is included into a first medium access control (MAC) control element (CE), wherein the one or more beam failure indication data indicates the beam failure detected on the at least one transmission reception point. The one or more beam failure indication data comprises at least a first bit that comprises a first value and a second value, wherein the first value of the first bit indicates a first transmission reception point at least on which the beam failure is detected. The first MAC CE comprising the one or more beam failure indication data is transmitted to an access point.