5G NR Power Headroom Reporting via BWP and Beam Signaling
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Solution Overview
Problem
The 5G network faces challenges in efficiently managing power headroom reporting, which is crucial for stable operation and optimal resource allocation, especially with diverse service requirements and conflicting parameters such as latency, data rates, and mobility across different usage scenarios.
Innovation Solution
The implementation of methods and systems for signaling bandwidth part (BWP) specific and beam specific maximum output power, along with power headroom reporting mechanisms that account for transmission waveform differences, timing, and new events, to enhance power headroom reporting control and estimation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If power headroom reporting is implemented with diverse service requirements, then network capacity allocation is improved, but system complexity increases due to conflicting parameters such as latency, data rates, and mobility
Solution Approach 1:
The patent segments power headroom reporting into multiple types (Type 1, Type 2, Type 3) corresponding to different service requirements and transmission scenarios. Each type reports power headroom for specific transmission configurations, allowing the system to manage complexity by handling different service types separately rather than as a monolithic system.
Solution Approach 2:
The patent introduces configurable parameters including power headroom reporting timing, estimation time intervals, and triggering events that can be adjusted based on service requirements. These parameter changes enable flexible adaptation to different service types (eMBB, URLLC, mMTC) without requiring fundamental system redesign, thus managing complexity while improving capacity allocation.
2Measurement precision
If beam specific and BWP specific maximum output power signaling is implemented, then power management precision is improved, but signaling overhead increases
Solution Approach 1:
The patent applies local quality by providing beam-specific and bandwidth part (BWP) specific maximum output power configurations rather than uniform power settings across all beams and BWPs. This allows precise power control for specific beams and BWPs where needed, improving power management precision while avoiding unnecessary signaling for configurations where default power settings suffice.
Solution Approach 2:
The patent implements partial signaling by providing detailed beam-specific and BWP-specific power configurations only when required for specific service types or transmission scenarios. For other scenarios, the system uses default or inherited power configurations, reducing signaling overhead while maintaining precision where it matters most for critical communications.
3Adaptability or versatility
If multiple power headroom report types are supported, then adaptability to different service scenarios is improved, but device complexity increases
Solution Approach 1:
The patent implements dynamic power headroom reporting where the UE can switch between different report types (Type 1, Type 2, Type 3) based on current transmission conditions and service requirements. The system dynamically selects appropriate reporting types and configurations, allowing adaptability to changing service scenarios without requiring the device to permanently maintain all possible reporting configurations, thus managing device complexity.
Data Source
AI summary
A number of power headroom solutions are disclosed, including but not limited to signaling of a bandwidth part (BWP) specific maximum outpower by a gNB to a UE, signaling of a beam specific maximum output power by the gNB to the UE, signaling by the UE to the gNB of the UE setting of BWP configured maximum transmit output power, signaling by the UE to the gNB of the UE setting of beam or group of beam configured maximum transmit output power, signaling by the UE to the gNB of BWP specific power headroom report, signaling by the UE to the gNB of beam or group of beam specific power headroom report and rules for power headroom reporting when the UE has overlapping resource grants.