Power Headroom Report Method for 5G Uplink Subframe Adaptation
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Solution Overview
Problem
Current LTE systems lack a standardized method for determining the type of Power Headroom Report (PHR) and timing of PHR reporting by User Equipment (UE) when reporting to a base station, leading to inefficiencies in resource allocation and communication performance.
Innovation Solution
A method and apparatus for a UE to determine the PHR reporting manner based on the structure of an uplink subframe in an active serving cell, calculating PHR accordingly, and transmitting it to the base station, utilizing timers and path loss changes to optimize reporting.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a standardized PHR reporting method is implemented, then resource allocation efficiency is improved, but system complexity increases
Solution Approach 1:
The patent applies parameter changes by dynamically adjusting PHR reporting parameters based on uplink subframe structure. The UE determines whether to report Type 1 or Type 2 PHR and selects reporting timing based on parameters such as subframe configuration, SPS activation status, and path loss changes. This resolves the contradiction by optimizing resource allocation through adaptive parameter selection rather than implementing a complex standardized method for all scenarios.
2Productivity
If PHR reporting is optimized based on uplink subframe structure, then communication efficiency is improved, but determination complexity increases
Solution Approach 1:
The patent implements dynamics by making PHR reporting behavior adaptive to real-time uplink subframe structure conditions. The UE dynamically determines reporting type and timing based on current subframe configuration, SPS status, and path loss measurements. This resolves the contradiction by optimizing communication efficiency through dynamic adaptation rather than static complex determination rules.
Solution Approach 2:
The patent applies preliminary action by having the UE proactively determine PHR reporting parameters before actual reporting occurs. The UE evaluates uplink subframe structure, checks SPS activation status, and determines path loss changes in advance to select appropriate reporting type and timing. This reduces real-time determination complexity while maintaining optimized communication efficiency.
3Productivity
If timers and path loss changes are used to optimize PHR reporting, then resource allocation is improved, but measurement and detection difficulty increases
Solution Approach 1:
The patent implements feedback by using path loss measurements and timer status as input conditions for determining PHR reporting behavior. The UE continuously monitors path loss changes between subframes and checks timer states to decide whether to trigger PHR reporting and what type to report. This resolves the contradiction by using straightforward feedback mechanisms (path loss comparison and timer status) rather than complex measurement and detection procedures.
Data Source
AI summary
The present disclosure relates to a pre-5th-Generation (5G) or 5G communication system to be provided for supporting higher data rates Beyond 4th-Generation (4G) communication system such as Long Term Evolution (LTE). The present application discloses a power headroom report (PHR) method and apparatus. A user equipment (UE) determines a PHR reporting manner according to the structure of an uplink subframe in an active serving cell, calculates PHR according to the reporting manner, and sends the PHR to a base station. According to the present disclosure, a UE proactively determines the PHR reporting manner, calculates PHR and report the PHR, thus implements PHR reporting process at the UE.