Multi-Beam PUSCH Power Headroom Reporting for Consistent PHR Calculation
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Solution Overview
Problem
In 5G New Radio (NR) networks, calculating power headroom reports (PHRs) for multi-beam uplink transmissions is challenging due to unclear transmission status across different beams, especially when PUSCH repetitions occur on multiple beams, leading to inconsistent and unpredictable PHR calculations.
Innovation Solution
Various options are proposed for calculating and reporting PHRs in multi-beam PUSCH scenarios, including actual and virtual PHRs based on configuration information, power control parameters, and beam-specific settings, along with different reporting methods such as averaging or minimum/maximum PHRs, to ensure accurate PHR determination.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multi-beam PUSCH repetitions are implemented to support lower latency and higher reliability, then transmission reliability is improved, but PHR calculation consistency deteriorates due to unclear transmission status across different beams
Solution Approach 1:
The patent segments the PHR calculation into beam-specific components, calculating separate PHR values for each beam (first PHR for first beam, second PHR for second beam) rather than attempting a single unified calculation. This allows accurate measurement of power headroom for each beam independently, resolving the consistency issue in multi-beam scenarios.
Solution Approach 2:
The patent applies local quality by calculating PHR specific to each beam's transmission characteristics. Each beam gets its own PHR calculation based on its specific power control parameters, pathloss, and transmission status, allowing accurate local measurement that accounts for beam-specific conditions rather than using a generic overall PHR.
2Measurement precision
If actual PHR calculation is performed for each beam based on transmission status, then measurement precision is improved, but device complexity increases due to multiple calculation options and configuration requirements
Solution Approach 1:
The patent implements dynamic PHR calculation where the UE determines whether to report actual PHR or virtual PHR based on transmission status. When transmission occurs on a beam, actual PHR is calculated using real transmission parameters; when transmission does not occur, virtual PHR is calculated using reference parameters. This dynamic approach maintains precision while simplifying the overall process.
Solution Approach 2:
The patent uses virtual PHR as a copy or reference model when actual transmission does not occur. Instead of requiring actual transmission data for all beams, the system creates virtual PHR values based on reference PUSCH transmission parameters, allowing accurate PHR reporting without requiring actual transmission to occur on every beam.
3Measurement precision
If beam-specific PHR calculation is implemented to account for varying beam conditions, then measurement precision is improved, but ease of operation deteriorates due to multiple configuration parameters and reporting methods
Solution Approach 1:
The patent creates a universal PHR reporting mechanism that handles multiple beam scenarios through a single framework. The same PHR calculation process works for both actual and virtual PHR, and the reporting mechanism accommodates different beam configurations without requiring separate procedures for each scenario, simplifying operation while maintaining precision.
Data Source
AI summary
The present application relates to devices and components including apparatus, systems, and methods for providing a power headroom report with respect to repetitions of uplink data transmissions with different beams in wireless communication systems.