SRS Power Control for Antenna Switching Imbalance
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Solution Overview
Problem
In communication systems, the current antenna structure design leads to SRS transmission power imbalance across different time slots, affecting downlink channel state information (CSI) accuracy and resulting in inconsistent SRS coverage across different antenna ports.
Innovation Solution
An SRS power control method where a terminal reports indication information to a network device about power imbalances across different antenna ports, allowing the network device to adjust the actual receiving power and perform necessary compensations during CSI calculation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If different antenna switching configurations are used to support various terminal transmission and reception capabilities, then the terminal's capability to obtain channel information is improved, but SRS transmission power imbalance occurs across different time slots
Solution Approach 1:
The patent applies parameter changes by dynamically adjusting the power compensation value based on the antenna switching configuration. The network device determines a power compensation value corresponding to the current antenna switching configuration and uses this to adjust the SRS power control command, thereby compensating for power imbalance while maintaining adaptability across different configurations.
Solution Approach 2:
The patent implements feedback by having the terminal report its antenna switching configuration to the network device, which then uses this information to determine appropriate power compensation values. This closed-loop approach ensures that power imbalance is continuously monitored and corrected based on actual operational conditions.
2Measurement precision
If power compensation is applied to adjust SRS receiving power, then CSI accuracy is improved, but system complexity increases due to additional power control mechanisms
Solution Approach 1:
The patent uses parameter changes by introducing a power compensation value that is determined based on the antenna switching configuration. This parameter is applied to adjust the SRS power control command, thereby improving CSI accuracy while keeping the complexity manageable through systematic parameter adjustment rather than complex rearchitecture.
Solution Approach 2:
The patent applies universality by making the power compensation mechanism applicable across different antenna switching configurations. The network device uses a unified approach to determine power compensation values for various configurations, reducing the need for separate handling of each case and thereby limiting complexity growth.
3Measurement precision
If multiple SRS resource sets are configured for different antenna ports, then channel state information acquisition is improved, but SRS coverage becomes inconsistent across different antenna ports
Solution Approach 1:
The patent applies parameter changes by adjusting the power control parameters dynamically based on the antenna port configuration. The network device determines power compensation values specific to each antenna switching configuration, ensuring that SRS coverage remains consistent across different antenna ports while maintaining comprehensive channel state information acquisition.
Solution Approach 2:
The patent implements local quality by applying different power compensation values to different antenna ports based on their specific characteristics and configurations. This localized approach ensures that each antenna port receives appropriate power adjustment to maintain consistent SRS coverage, while still allowing multiple resource sets to be configured for comprehensive CSI acquisition.
Data Source
AI summary
A method and apparatus for sounding reference signal (SRS) power control. The SRS power control is performed by: in response to determining that the transmission power of a plurality of different antenna ports corresponding to different SRS resources of specified antenna switching configurations is unbalanced, sending indication information to a network device, the indication information being used for indicating power adjustment information, and the power adjustment information being used for instructing the network device to adjust actual receiving power of the plurality of different antenna ports corresponding to different SRS resources of the specified antenna switching configurations.