User Terminal Transmit Power Control Signaling Reduction
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Solution Overview
Problem
In future radio communication systems like NR, independent application of beam specific, waveform specific, and service type specific power control leads to a significant increase in signaling requirements, resulting in deteriorated communication throughput.
Innovation Solution
A method where a user terminal determines transmit power parameters based on a correspondence relationship between a transmit power parameter set and an object set, using power control IDs, object IDs, and parameter set IDs to perform flexible transmit power control, thereby reducing the signaling amount.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If beam specific power control, waveform specific power control, and service type specific power control are applied independently, then power control precision is improved, but signaling amount increases enormously and communication throughput deteriorates
Solution Approach 1:
The patent combines multiple power control parameter sets (beam-specific, waveform-specific, service-type specific) into a unified parameter configuration. The base station configures multiple parameter sets with different identifiers, and the UE selects and applies appropriate parameters based on current communication conditions, merging what would otherwise require separate independent control mechanisms into a single integrated system.
Solution Approach 2:
The patent implements dynamic parameter selection where the UE determines which power control parameters to apply based on real-time conditions such as serving beam, waveform type, and service category. The base station provides dynamic indication through downlink control information to switch between different parameter sets, allowing the system to adapt power control precision to current needs without maintaining permanently active multiple independent control paths.
2Adaptability or versatility
If multiple specific power control parameters are configured for UE, then power control adaptability is improved, but device complexity and signaling requirements increase
Solution Approach 1:
The patent segments power control parameters into multiple distinct parameter sets, each optimized for specific scenarios (beam-specific, waveform-specific, service-type specific). Each set is identified by a unique identifier, allowing the UE to selectively apply only the relevant parameters for current communication conditions rather than managing one large complex configuration.
Solution Approach 2:
The patent creates a universal power control framework where a single parameter configuration mechanism serves multiple functions. The same base station configuration procedure and UE parameter selection logic handle beam-specific, waveform-specific, and service-type specific power control through a unified interface, reducing the need for separate configuration procedures for each power control type.
3Measurement precision
If beam specific power control is implemented, then transmit power precision is improved, but communication throughput is reduced due to increased signaling
Solution Approach 1:
The patent implements beam-specific power control with periodic updates rather than continuous independent signaling. The base station configures beam-specific parameter sets that are applied periodically or triggered by specific events (beam changes, scheduling decisions), reducing the frequency of power control signaling while maintaining precision when needed.
Solution Approach 2:
The patent introduces parameter set identifiers as intermediaries between the base station and UE for beam-specific power control. Instead of direct beam-specific power commands requiring extensive signaling, the base station transmits compact identifier information that the UE uses to select from pre-configured parameter sets, reducing signaling overhead while preserving beam-specific precision.
Data Source
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AI summary
A user terminal according to one aspect of the present invention is characterized by having a receiving section that receives a power control ID, a control section that controls transmit power according to a transmit power parameter set specified by the power control ID, and a transmitting section that transmits a signal corresponding to an object set specified by the power control ID, using the transmit power. According to one aspect of the invention, it is possible to suppress a reduction in communication throughput, even in the case of using beam specific transmit power control.