Power Headroom Reporting for Neighbor-Aware NR Scheduling
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Solution Overview
Problem
In New Radio (NR) systems, Power Headroom Reports (PHRs) are typically triggered only for local network nodes, which limits network device scheduling and optimization in mobile and multi-TRP scenarios.
Innovation Solution
The PHR reporting method includes reporting the power headroom of both local and neighboring network nodes, triggered by conditions such as configuration changes, cell quality, or path loss variations, enabling comprehensive network optimization.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If PHR is triggered only for local network nodes, then the reporting complexity is reduced, but the network scheduling and optimization capability in mobile and multi-TRP scenarios is limited
Solution Approach 1:
The PHR reporting is segmented into different types: type1-PHR for local network nodes and type2-PHR for neighboring network nodes. The terminal can selectively report based on the trigger condition, dividing the reporting task into manageable parts that address different network scenarios without overwhelming complexity
Solution Approach 2:
The PHR mechanism is enhanced to serve multiple functions: it can report both local and neighboring network node power headroom information, support both type1 and type2 reporting formats, and adapt to different scenarios (mobile, multi-TRP, handover) through a unified triggering mechanism, making the system universally applicable across diverse network conditions
2Adaptability or versatility
If PHR includes power headroom of neighboring network nodes, then the network optimization capability is improved, but the information processing complexity increases
Solution Approach 1:
The PHR reporting mechanism is made dynamic through configurable trigger conditions. The network can dynamically enable or disable type2-PHR reporting based on scenario needs, and the terminal dynamically determines whether to include neighboring network node information based on whether type2-PHR is configured and trigger conditions are met, adapting the information processing complexity to actual network optimization needs
Solution Approach 2:
Different reporting qualities are applied to different network nodes: type1-PHR provides detailed local network node information for immediate scheduling decisions, while type2-PHR provides neighboring network node information for handover and mobility optimization. Each type serves its specific local quality requirement without unnecessary processing overhead
3Measurement precision
If multiple trigger conditions are monitored for PHR reporting, then the reporting accuracy is improved, but the monitoring complexity increases
Solution Approach 1:
The PHR reporting uses periodic triggering mechanisms where the terminal monitors configured events (a3 event, a5 event, path loss changes) at specified intervals and thresholds. This periodic monitoring approach ensures accurate detection of network conditions while maintaining manageable complexity through standardized event evaluation procedures
Data Source
AI summary
A Power Headroom Report (PHR) reporting method, a PHR receiving method, a terminal, and a network device are provided. The method includes: reporting a PHR in a case that a preset reporting trigger condition is satisfied. The PHR includes a Power Headroom (PH) of a network node. The network node includes a neighboring network node, or a local network node and a neighboring network node.