Uplink Reference Signal Transmit Power Adaptation
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Solution Overview
Problem
In LTE and 5G networks, the existing method for determining the transmit power of uplink reference signals is based on SC-OFDM technology, which can reduce the reliability of uplink reference signal transmission when CP-OFDM technology is used for uplink data transmission.
Innovation Solution
The method involves determining the transmit power of uplink reference signals based on their sequence type, using power parameters configured by the access network device, and adjusting the power offset or initial power to ensure suitable transmit power for the corresponding sequence type, thereby improving transmission reliability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the prior-art method for determining transmit power of uplink reference signals is used, then the method is simple and based on SC-OFDM technology, but the uplink reference signal transmission reliability is reduced when CP-OFDM technology is used
Solution Approach 1:
The patent introduces dynamic adaptability by enabling the transmit power determination method to dynamically adjust based on the OFDM technology type (SC-OFDM or CP-OFDM) being used. The system transitions from a static, SC-OFDM-specific power determination approach to a dynamic approach that automatically adapts to different modulation technologies, thereby resolving the contradiction between reliability and adaptability.
Solution Approach 2:
The patent changes the parameter of transmit power determination by introducing different power determination methods or parameters specifically tailored for CP-OFDM technology versus SC-OFDM technology. By modifying the power determination parameters based on the OFDM type, the system achieves both high reliability for each specific technology and broad adaptability across different technologies.
2Productivity
If CP-OFDM technology is used for uplink data transmission with frequency division multiplexing, then resource utilization and flexibility are improved, but the existing transmit power determination method becomes inadequate
Solution Approach 1:
The patent applies local quality by introducing specific transmit power determination mechanisms tailored for CP-OFDM frequency division multiplexing scenarios. Instead of using a universal power determination method, the system implements localized power control strategies that are optimized for the specific characteristics of CP-OFDM FDM, thereby improving both resource utilization and power determination accuracy for this specific application.
Data Source
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AI summary
This application provides an uplink reference signal sending method and an apparatus. The method includes: sending, by an access network device, signaling to a terminal device; determining, by the terminal device, a sequence type of an uplink reference signal based on the signaling; determining, by the terminal device, transmit power of the uplink reference signal based on the sequence type of the uplink reference signal; and sending, by the terminal device, the uplink reference signal by using the transmit power of the uplink reference signal. A purpose thereof is to improve uplink reference signal transmission reliability.