SRS Antenna Port Power Allocation for PA-Limited Uplink Transmission
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Solution Overview
Problem
In existing SRS transmission methods, the power is equally split across all SRS antenna ports, leading to underutilization of the terminal's Power Amplifier (PA) capability and suboptimal performance.
Innovation Solution
Determine the transmission power of SRS antenna ports based on a first factor and a first power, which can include parameters like maximum output power, path-loss information, and resource allocation, to adjust and scale the power accordingly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the transmission power is equally split across all SRS antenna ports, then the power allocation is simple and uniform, but the terminal's PA capability cannot be fully utilized and SRS transmission performance is suboptimal
Solution Approach 1:
The patent applies local quality by differentiating power allocation across different SRS antenna ports based on their specific characteristics. Instead of uniform power splitting, the terminal device determines power for each antenna port individually, allowing certain ports to receive higher power when PA capability permits, thereby optimizing transmission performance while maintaining manageable complexity through structured power determination methods
Solution Approach 2:
The patent implements dynamics by making power allocation adaptive rather than static. The terminal device dynamically adjusts power distribution across antenna ports based on PA capability status - when PA capability is not reached, power can be concentrated on specific ports to improve performance; when PA capability is reached, power is distributed to avoid overload. This dynamic adjustment resolves the contradiction between simplicity and performance
2Ease of operation
If the transmission power is equally split across multiple OFDM symbols, then the power distribution is uniform and simple, but the terminal's PA capability is underutilized
Solution Approach 1:
The patent applies parameter changes by modifying the power distribution parameters across OFDM symbols based on PA capability. Instead of fixed equal splitting, the terminal adjusts power parameters dynamically - allocating higher power to certain OFDM symbols when PA headroom exists, and redistributing when approaching PA limits. This parameter adaptation enables full PA utilization while maintaining operational simplicity through standardized adjustment rules
3Reliability
If maximum transmission power is not reached, then the terminal operates within safe limits, but the PA capability cannot be fully utilized
Solution Approach 1:
The patent implements dynamics by creating a dynamic power control mechanism that continuously monitors PA capability and adjusts transmission power accordingly. When PA capability is not reached, the system dynamically increases power allocation to utilize available headroom; when PA limits are approached, it dynamically reduces power to maintain safety. This dynamic balance resolves the contradiction between reliability and productivity
Solution Approach 2:
The patent applies feedback by establishing a closed-loop power control system where the terminal monitors its PA capability status and uses this feedback to adjust power allocation. The feedback mechanism allows the system to learn from PA utilization patterns and optimize power distribution - increasing power when capability permits and reducing when limits are approached, thereby simultaneously achieving full capability utilization and operational safety
Data Source
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AI summary
The present disclosure provides an SRS transmission method, an indication method, an apparatus, a terminal, and a network device. The method comprises: determining a transmission power of an SRS antenna port of a first SRS resource on the basis of a first factor and a first power; transmitting an SRS on the basis of the transmission power of the SRS antenna port of the first SRS resource, the first power being a power determined on the basis of one or more of the following parameters: a maximum output power corresponding to SRS transmission, a maximum output power corresponding to uplink transmission, path-loss information, resource allocation information, or a target power.