Uplink Power Scaling Factor for 5G NR Full Transmission
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Solution Overview
Problem
Current power scaling solutions for uplink full power transmission in 5G NR networks lead to inefficient power usage, particularly for PUSCH and SRS transmissions, as they do not fully utilize the UE's transmit power, resulting in suboptimal performance.
Innovation Solution
Implementing a power scaling factor for both PUSCH and SRS transmissions, allowing the UE to scale its output power based on the reported capabilities and configurations, ensuring that the maximum transmit power is reached only when necessary, thereby optimizing power usage across multiple antenna ports.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If current power scaling solutions are used for uplink full power transmission, then the UE can transmit uplink data, but the power usage is inefficient and the transmit power is not fully utilized
Solution Approach 1:
The patent applies dynamics by making the power scaling factor adjustable and adaptive rather than fixed. The network can dynamically configure different power scaling factors (e.g., 1.0, 0.5, 0.25) based on real-time channel conditions, UE capabilities, and transmission requirements, allowing the system to optimize power usage while maintaining transmission performance.
Solution Approach 2:
The patent changes the parameter of power scaling factor from a fixed value to a configurable parameter that can be adjusted based on transmission mode, UE capability, and network conditions. This enables the system to vary the effective transmit power to match actual needs, resolving the contradiction between power efficiency and transmission performance.
2Use of energy by moving object
If power scaling factor is introduced for PUSCH and SRS transmissions, then power usage is optimized, but the system complexity increases
Solution Approach 1:
The patent makes the power scaling mechanism universal by applying the same power scaling factor configuration to multiple transmission types (PUSCH, SRS, and their combinations). This multi-functional approach consolidates the control logic rather than requiring separate mechanisms for each transmission type, thereby limiting the increase in system complexity.
Solution Approach 2:
The patent incorporates feedback mechanisms where the network monitors transmission conditions and UE capabilities, then adjusts the power scaling factor accordingly. This closed-loop control ensures optimal power usage while the standardized feedback procedures prevent excessive complexity in the control mechanism.
3Use of energy by moving object
If maximum transmit power is reached only when necessary, then power efficiency improves, but the transmission reliability may be compromised
Solution Approach 1:
The patent applies preliminary action by having the network pre-configure power scaling factors and UE capability information before transmission occurs. The network can anticipate when full power is needed based on channel conditions and transmission requirements, adjusting power scaling in advance rather than reacting after the fact, thereby maintaining reliability while improving efficiency.
Solution Approach 2:
The patent enables self-service by allowing the UE to report its own power capabilities and the network to autonomously determine appropriate power scaling factors without requiring complex real-time negotiation. This autonomous decision-making maintains transmission reliability while optimizing power efficiency through UE capability-based configuration.
Data Source
AI summary
A computer-readable storage medium stores instructions to configure a UE for power scaling in uplink data transmissions in a 5G NR and beyond wireless network, and to cause the UE to perform operations including decoding RRC signaling received from a base station. The RRC signaling includes a power scaling factor. The power scaling factor indicates a transmission mode for uplink full power transmission. A linear output power value is determined for a maximum output power associated with the UE. The linear output power value is scaled using the power scaling factor to generate a scaled linear output power value. A PUSCH power control output is determined based on the scaled linear output power value. The operations further include causing the uplink full power transmission of uplink data using the PUSCH. The uplink full power transmission has transmit power based on the PUSCH power control output.