Uplink Scheduling Request Priority for Beam Failure Recovery
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Solution Overview
Problem
Current mobile communication designs do not adequately address the priority and multiplexing of scheduling requests for serving cell beam failure recovery (SCell BFR) in New Radio (NR) specifications, particularly when they overlap with other uplink transmissions like those for enhanced mobile broadband (eMBB) or ultra reliable low latency communication (URLLC).
Innovation Solution
The proposed solution involves determining specific priority rules for scheduling requests dedicated to SCell BFR, ensuring these requests are transmitted with higher priority than those for eMBB but lower than those for URLLC, and implementing methods to multiplex SCell BFR scheduling requests with other uplink information transmissions using various PUCCH formats and resource configurations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If SCell BFR scheduling requests are transmitted with high priority to ensure timely beam recovery, then beam failure recovery reliability is improved, but it may interfere with other uplink transmissions like eMBB and URLLC
Solution Approach 1:
The patent applies parameter changes by introducing a priority parameter for SCell BFR scheduling requests that differentiates them from normal scheduling requests. This priority parameter allows the system to adjust the transmission behavior based on the specific type of SR, enabling timely beam recovery while managing interference with other uplink transmissions through controlled priority levels.
Solution Approach 2:
The patent segments scheduling requests into different types: normal SR and SCell BFR-specific SR. This segmentation allows the system to apply different priority rules and multiplexing behaviors to different SR types, ensuring that beam failure recovery requests are handled with appropriate priority while other transmissions maintain their normal behavior.
2Device complexity
If current NR specification priority rules are applied to SCell BFR scheduling requests, then multiplexing with eMBB and URLLC is simplified, but beam failure recovery latency requirements are not met
Solution Approach 1:
The patent modifies the priority parameter assignment for SCell BFR scheduling requests, giving them a specific priority level that ensures timely transmission. This parameter change addresses the latency requirement by ensuring BFR SRs are transmitted with appropriate urgency while maintaining manageable multiplexing complexity through defined priority rules.
3Speed
If SCell BFR scheduling requests are given highest priority to ensure fastest recovery, then recovery speed is improved, but other critical services like URLLC may be degraded
Solution Approach 1:
The patent applies local quality by assigning different priority levels to different types of scheduling requests based on their specific requirements. SCell BFR SRs receive a priority level that ensures fast recovery without necessarily being the absolute highest priority, while URLLC transmissions maintain their own priority guarantees. This localized quality adjustment ensures each service receives appropriate priority without degrading others.
Data Source
AI summary
Disclosed is a method and apparatus for uplink information transmission. In the method, a user equipment (UE) determines a priority rule and transmits at least one of first uplink information or second uplink information based on the priority rule, the first uplink information includes a first scheduling request (SR) that is dedicatedly configured for serving cell (SCell) beam failure recovery.