Uplink Power Control for Carrier Aggregation
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Solution Overview
Problem
Current wireless communication systems face inefficiencies in transmitting control information and managing resources, particularly in carrier aggregation systems, which can lead to increased overhead and reduced data transmission rates due to the complexity of uplink control information handling.
Innovation Solution
The proposed method involves configuring uplink power control to prioritize and manage uplink control information transmission across multiple cell groups, allowing PUCCH to be transmitted through specific secondary cells, thereby optimizing resource allocation and reducing overhead by applying guaranteed power settings based on protection priorities across cell groups.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If uplink control information is transmitted through multiple cell groups in carrier aggregation, then control information coverage is improved, but resource management complexity and overhead increase
Solution Approach 1:
The patent segments cell groups into different types (first cell group with PUCCH capability, second cell group without PUCCH capability) and assigns different power control parameters to each segment. This segmentation allows simplified resource management within each segment while achieving reliable control information transmission across all cell groups through the PUCCH-capable segment.
2Reliability
If guaranteed power is allocated to uplink control information, then transmission reliability is improved, but available power for data transmission is reduced
Solution Approach 1:
The patent introduces a configurable power control parameter (e.g., powerOffset) that dynamically adjusts the guaranteed power allocation for uplink control information. By changing this parameter, the system can optimize the balance between control information reliability and data transmission capacity according to different service requirements and channel conditions.
Data Source
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AI summary
The present invention relates to a wireless communication system. Specifically, the present invention relates to a method for controlling transmit power and an apparatus therefor, the method comprising: a step of configuring a first cell group consisting of a PCell and zero or more SCells, and a second cell group consisting of one or more SCells; a step of determining transmit power of a first PUCCH to be transmitted through the PCell in a subframe #n; and a step of determining transmit power of a second PUCCH to be transmitted through a predetermined SCell in the second cell group in the subframe #n, wherein the transmit power of the first PUCCH and the transmit power of the second PUCCH are adjusted so that the total sum of transmit power of a terminal is not greater than the maximum transmit power of the terminal, considering a minimum guaranteed power which is assigned to each cell group according to protection priorities between cell groups, and the minimum guaranteed power which is assigned to each cell group is selectively applied to a specific UCI among a plurality of UCIs.