Power Headroom Report Format for Supplementary Uplink
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Solution Overview
Problem
Current Power Headroom Report (PHR) formats in 5G wireless communication networks are inadequate for supporting Type 3 PHR for serving cells configured with Supplementary Uplink (SUL) carriers, leading to inefficiencies in power management and resource utilization.
Innovation Solution
The proposed solution involves updating PHR formats to include separate indications for uplink Reference Signal (RS) transmission power and user data transmission power, allowing for the estimation of transmission power status and enabling differential triggering of PHRs for carriers at high and lower frequencies, thereby optimizing overhead and performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If current PHR formats are used for SUL carriers, then compatibility with existing PHR structure is maintained, but Type 3 PHR support is inadequate leading to inefficient power management
Solution Approach 1:
The patent segments the PHR MAC CE into multiple components: a first part for Type 1 and Type 2 PHR information, and a second part for Type 3 PHR information. This segmentation allows the PHR format to accommodate multiple PHR types simultaneously, improving adaptability for SUL carrier scenarios while maintaining structured organization for reliable power management.
Solution Approach 2:
The updated PHR MAC CE structure serves multiple functions by incorporating indicators and fields for both Type 1/2 PHR and Type 3 PHR within a single MAC CE. This multi-functionality enables the same PHR format to support various carrier types (NR UL and SUL carriers) while providing comprehensive power management capabilities.
2Measurement precision
If separate PHR reporting for NR UL and SUL carriers is implemented, then power management precision is improved, but signaling overhead increases
Solution Approach 1:
The patent merges Type 1, Type 2, and Type 3 PHR information into a single PHR MAC CE structure with unified indicators. This combining approach allows precise power management for both NR UL and SUL carriers while avoiding the overhead of separate PHR reports, as all PHR types are transmitted together in one consolidated message.
Solution Approach 2:
The patent introduces specific parameter changes in the PHR MAC CE format, including new indicators for Type 3 PHR presence and modified field arrangements. These parameter changes enable precise differentiation between PHR types without requiring separate MAC CEs, thus maintaining measurement precision while optimizing overhead efficiency.
3Productivity
If PHR triggering is differential for high and low frequency carriers, then resource utilization is optimized, but PHR configuration complexity increases
Solution Approach 1:
The patent implements dynamic PHR triggering based on carrier frequency characteristics. The PHR MAC CE includes indicators that enable differential triggering for high frequency (NR UL) and low frequency (SUL) carriers. This dynamic approach allows the system to optimize resource utilization by triggering PHR reports selectively based on actual transmission conditions while managing complexity through standardized triggering parameters.
Data Source
AI summary
Embodiments herein relates to a method performed by a UE for handling communication in a wireless communications network. The UE transmits a first indication in a PHR of a serving cell to a radio network node, wherein the first indication indicates presence of a first type of PH of a first carrier in the PHR of the serving cell, and wherein the first type is referring to an uplink RS transmission power. The PHR of the serving cell further comprises a second indication indicating presence of a PH of a second type of a second carrier of the serving cell, wherein the second type is referring to a user data transmission power.