Terminal Power Control via Beam Set Headroom Reporting
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Solution Overview
Problem
In high-frequency networking, existing methods struggle to accurately calculate power headroom and transmit powers for uplink shared channels and physical uplink control channels, leading to issues like increased interference, inadequate resource scheduling, and reduced uplink throughput due to inaccurate power control.
Innovation Solution
A power control method that estimates transmit powers on uplink shared channels and physical uplink control channels using beam sets, with a terminal device receiving configuration information from a base station to calculate power headroom and generate a report, allowing the base station to adjust transmit powers accordingly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a terminal calculates power headroom and transmit power based on downlink path loss of CRS in existing LTE system, then power control can be implemented, but network coverage is limited, power consumption is high, path loss is high, spectrum efficiency is low, and system capacity is low in high-frequency networking
Solution Approach 1:
The patent changes the fundamental parameter for power control from downlink path loss of CRS to uplink reference signal power and downlink reference signal power. This parameter transformation enables accurate power control in high-frequency networking while improving system capacity and reducing path loss issues
Solution Approach 2:
The patent replaces the traditional mechanical path loss calculation method with a new method based on reference signal power measurements. This substitution allows for more accurate power control in high-frequency environments, resolving the contradiction between power control accuracy and system capacity
2Measurement precision
If a terminal calculates power headroom based on downlink path loss of CRS, then power headroom report can be generated, but interference between terminals increases and uplink throughput decreases due to inaccurate power control
Solution Approach 1:
The patent substitutes the traditional path loss-based power headroom calculation with a reference signal power-based approach. This replacement significantly improves measurement precision and reduces interference between terminals by providing more accurate power control information to the base station
Solution Approach 2:
The patent enhances the feedback mechanism by using reference signal power measurements to generate more accurate power headroom reports. This improved feedback loop allows the base station to make more precise power control adjustments, reducing terminal interference and improving uplink throughput
Data Source
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AI summary
Embodiments of the present invention disclose a power control method and a terminal device. The method includes: receiving configuration information sent by a base station, where the configuration information includes an uplink power control parameter; estimating, according to the uplink power control parameter, a transmit power that is on an uplink shared channel and that is of a beam set in which a terminal device is located; calculating, according to a maximum transmit power of the terminal device and the transmit power that is on the uplink shared channel and that corresponds to the beam set in which the terminal device is located, a power headroom of the beam set in which the terminal device is located; and generating a power headroom report according to the power headroom of the beam set in which the terminal device is located, and sending the power headroom report to the base station. The power headroom of the beam set is calculated in a beam space, and is sent to the base station in a form of the power headroom report, so that the base station adjusts a power on a terminal device side. Based on the foregoing method, problems such as increased interference between terminal devices, inadequate resource scheduling and a reduced uplink throughput that are caused by inaccurate power control can be avoided.