Multi-Carrier Power Headroom Reporting Segmentation
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Solution Overview
Problem
Current wireless communication systems, such as LTE and LTE-Advanced, lack a method for user equipment (UE) to effectively transmit power headroom reports in multi-carrier systems, which is essential for efficient resource allocation and scheduling.
Innovation Solution
The UE transmits power headroom reports by calculating and sending first-type and second-type power headroom information using the physical uplink shared channel (PUSCH) and Physical Uplink Control Channel (PUCCH) power values for activated component carriers, allowing efficient power management and scheduling in multi-carrier environments.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the UE transmits power headroom reports for multiple component carriers, then the eNodeB can perform precise power management and scheduling, but the signaling overhead and complexity of power headroom reporting increases
Solution Approach 1:
The power headroom report is segmented into multiple fields, with each field corresponding to a specific component carrier. This allows the UE to report power headroom information for each carrier individually, enabling precise power management while maintaining a structured and manageable reporting format that reduces overall complexity
Solution Approach 2:
The patent introduces a new dimension to power headroom reporting by extending the single-carrier report structure to multi-carrier systems. The power headroom report now includes multiple sets of power headroom information, each associated with a different component carrier, thereby enabling comprehensive power management across all active carriers
2Productivity
If the UE reports power headroom information for all activated component carriers, then the eNodeB can optimize resource allocation, but the transmission time and processing requirements increase
Solution Approach 1:
The UE performs preliminary calculations of power headroom values for all activated component carriers before transmitting the report. This preliminary action allows the UE to prepare and organize the power headroom information in advance, reducing the actual transmission time and processing requirements while still providing comprehensive data for optimized resource allocation
3Manufacturing precision
If the UE transmits detailed power headroom information including both first-type and second-type power headroom, then the eNodeB can precisely control MCS levels, but the signal overhead increases
Solution Approach 1:
The patent applies local quality by providing different types of power headroom information (first-type and second-type) tailored to specific needs. The first-type power headroom information provides basic power headroom values, while the second-type provides more detailed information including power headroom for PUCCH. This localized differentiation allows the eNodeB to precisely control MCS levels when needed while avoiding unnecessary overhead in scenarios where only basic information is required
Data Source
AI summary
A method and device for transmitting a power headroom report (PHR) by a user equipment (UE) in a communication system supporting a plurality of carriers. The method includes transmitting, to an eNode B (eNB), a power headroom report (PHR) related to the plurality of carriers configured for the UE. The power headroom report (PHR) comprises a first type power headroom (PH) and a second type power headroom (PH). While the first type power headroom (PH) is calculated for a power headroom report (PHR) related to a primary carrier and a non-primary carrier, the second type power headroom (PH) is calculated for a power headroom report (PHR) related to only the primary carrier. The second type power headroom (PH) is calculated for case of simultaneous transmission of a physical uplink control channel (PUCCH) and a physical uplink shared channel (PUSCH).