PUCCH-BFR Multiplexing Power Scaling and Signal Dropping
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Solution Overview
Problem
Current wireless communication systems face challenges in efficiently multiplexing physical uplink control channels (PUCCH) for beam failure recovery (BFR) with other signals, particularly when these channels are multiplexed in overlapped symbols or component carriers, leading to potential power collisions and transmission conflicts.
Innovation Solution
Implementing priority rules for power scaling and dropping of PUCCH-BFR signals in relation to other uplink signals, such as PRACH, PUSCH, and SRS, to manage transmission power and avoid collisions, by assigning higher priorities to critical BFR transmissions and scaling or dropping lower-priority signals as necessary.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If PUCCH-BFR is multiplexed with other uplink signals in overlapped symbols, then resource utilization is improved, but power collisions and transmission conflicts occur
Solution Approach 1:
The patent applies parameter changes by dynamically adjusting transmission power levels and signal prioritization parameters based on signal type and collision scenarios. Different power scaling factors are assigned to different uplink signals (PUCCH-BFR, PUSCH, PUCCH, SRS) to resolve power collisions while maintaining efficient resource utilization.
Solution Approach 2:
The patent implements local quality by assigning different priority levels and power scaling characteristics to different signals based on their specific requirements. PUCCH-BFR receives higher priority with aggressive power scaling to ensure beam failure recovery reliability, while other signals like SRS receive lower priority with conservative power scaling.
2Reliability
If transmission power is increased for PUCCH-BFR to ensure reliable transmission, then beam failure recovery reliability is improved, but power collisions with other signals increase
Solution Approach 1:
The patent uses parameter changes by implementing dynamic power scaling factors that adjust transmission power based on signal priority and collision detection. When PUCCH-BFR is detected to be in collision with other signals, power scaling parameters are modified to allocate sufficient power to PUCCH-BFR while reducing power to lower-priority signals.
Solution Approach 2:
The patent introduces an intermediary mechanism through power scaling rules and priority-based arbitration logic that mediates between competing signals. This intermediary layer resolves power collisions by systematically allocating power resources according to predefined priority hierarchies, ensuring PUCCH-BFR receives adequate power without causing harmful interference to other transmissions.
3Reliability
If lower-priority signals are dropped to ensure PUCCH-BFR transmission, then transmission conflicts are reduced, but resource utilization efficiency decreases
Solution Approach 1:
The patent applies parameter changes through dynamic signal prioritization and selective dropping decisions based on collision severity and system state. Rather than always dropping lower-priority signals, the system adjusts dropping parameters dynamically - only dropping signals when necessary to prevent harmful power collisions, thereby maintaining high resource utilization while ensuring PUCCH-BFR reliability.
Data Source
AI summary
Apparatuses, systems, and methods for multiplexing of PUCCH for beam failure recovery and other signals. A UE may determine a transmission dropping rule and a transmission power scaling rule for a PUCCH which is dedicatedly configured for secondary BFR transmission, such as a PUCCH-BFR, when it is multiplexed with at least one other signal. The PUCCH-BFR and the at least one other signal may be multiplexed in a CC or in multiple CCs. The UE may determine a transmission dropping rule, e.g., so that UE can transmit an uplink signals with higher priority and drop the other uplink signal with lower priority to avoid beam collisions. The UE may determine a transmission power scaling rule, e.g., so the UE may scale transmission power within a CC and/or across CCs. The UE may multiplex the PUCCH-BFR with the at least one other signal according to the rules.