PUCCH Power Control for 32-Carrier Uplink Feedback
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Solution Overview
Problem
The existing power control mechanisms for the Physical Uplink Control Channel (PUCCH) in LTE-A systems face challenges in managing power control effectively when supporting a maximum of 32 carriers, leading to capacity shortages and inability to perform power control efficiently.
Innovation Solution
A method that calculates the transmit power of the PUCCH based on obtained parameter information, including quantity information of resource blocks, Reed-Muller codes, orthogonal cover codes, coding formats, modulation formats, and scale factors, to accurately determine and adjust the power control, using configured coefficients and functions such as linear, logarithmic, or exponential functions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the number of aggregated carriers is increased to support higher data rates, then the peak data rate and system throughput are improved, but the uplink control information overhead increases exponentially and power control capability is lost
Solution Approach 1:
The patent segments the uplink control information by introducing separate physical channels: PUCCH for control information and PUSCH for data. This segmentation allows independent power control for control information while supporting carrier aggregation, resolving the contradiction between maintaining power control capability and supporting high throughput with multiple carriers.
2Productivity
If the number of aggregated carriers is increased to support higher data rates, then the peak data rate and system throughput are improved, but the existing power control mechanism becomes incapable of performing power control
Solution Approach 1:
The patent introduces dynamic power control parameters including path loss compensation factor (α), downlink-to-uplink power ratio (β), and power control adjustment factors that can be dynamically adjusted based on channel conditions and carrier aggregation configuration. This dynamic approach enables effective power control across multiple aggregated carriers while supporting high data rates.
3Quantity of substance
If UCI supporting maximum of 32 carriers is fed back on PUCCH, then the system capacity is increased, but the existing power control mechanism cannot perform power control on the PUCCH
Solution Approach 1:
The patent changes the power control parameters by introducing new formulas specific to PUCCH with carrier aggregation support. The power control adjustment factor δ_PUCCH(i) and path loss compensation are redefined to work with up to 32 aggregated carriers, enabling both high UCI capacity and manageable power control operation through standardized parameter adjustments.
Data Source
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AI summary
The present invention relates to a method, a terminal, and a base station. The method includes: obtaining parameter information of a physical uplink control channel (PUCCH), where the parameter information includes one or more of quantity information of a resource block (RB), quantity information of a Reed-Muller (RM) code, quantity information of an orthogonal cover code (OCC), coding format information, modulation format information, and value information of a scale factor (SF) of the PUCCH, or the parameter information includes at least one configuration parameter corresponding to one or more of quantity information of an RB, quantity information of an RM code, quantity information of an OCC, coding format information, modulation format information, and value information of an SF; calculating transmit power of the PUCCH according to the parameter information; and transmitting the PUCCH according to the calculated transmit power. In embodiments of the present invention, parameter information of a PUCCH is obtained, and transmit power of the PUCCH is calculated according to the parameter information, so as to resolve a power control problem of the PUCCH that occurs when UCI that supports a maximum of 32 carriers is fed back on the PUCCH.