Terminal Device Uplink Power Control via Reference Signal
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Solution Overview
Problem
In the Long Term Evolution (LTE) system, improving the transmission power of terminal devices is essential to enhance communication performance, which current methods have not adequately addressed.
Innovation Solution
A wireless communication method where a terminal device determines the transmission power of a target uplink signal based on a reference uplink signal, allowing for optimized power control across various channels and systems, including Physical Uplink Shared Channel (PUSCH), Physical Uplink Control Channel (PUCCH), Physical Random Access Channel (PRACH), and Sounding Reference Signal (SRS), and utilizing the same or adjacent carriers and beams for improved power management.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the transmission power of terminal device is increased to improve communication performance, then communication performance is improved, but energy consumption increases
Solution Approach 1:
The patent applies parameter changes by dynamically adjusting transmission power based on signal quality metrics (RSRP, SINR) and channel conditions. The terminal device calculates pathloss and adjusts uplink transmission power parameters (P0, alpha) to optimize the balance between communication performance and energy consumption, ensuring sufficient power only when needed for maintaining reliable communication.
Solution Approach 2:
The terminal device performs self-service by autonomously determining its own transmission power without requiring continuous network control. The device uses locally measured reference signal parameters and pathloss calculations to self-adjust power levels, reducing energy waste while maintaining communication reliability through intelligent power management.
2Measurement precision
If the terminal device uses complex power control methods to optimize transmission power, then power control precision is improved, but device complexity increases
Solution Approach 1:
The patent uses downlink reference signals as an intermediary to enable accurate uplink power control. The terminal device measures downlink reference signal received power (RSRP) and signal-to-interference-plus-noise ratio (SINR) to calculate pathloss, which serves as a mediator for determining appropriate uplink transmission power. This approach achieves precise power control by leveraging readily available downlink measurements rather than requiring complex direct uplink power measurements.
3Productivity
If the terminal device determines transmission power based on reference uplink signal, then power control efficiency is improved, but signal processing complexity increases
Solution Approach 1:
The patent applies preliminary action by having the network device pre-configure reference signal parameters (resource locations, sequences, frequencies) before uplink transmission. The terminal device uses these pre-configured reference signals to calculate pathloss and determine transmission power in advance, improving power control efficiency by avoiding real-time complex signal processing during actual data transmission.
Data Source
AI summary
The implementations of the present disclosure provide a wireless communication method and device, being able to determine, with reference to the transmission power of one uplink signal, the transmission power of another signal as required in a reasonable manner, and directly schedule the fixed transmission power without the need of a network device, thereby improving the communication performance. The method comprises: a terminal device determining a reference uplink signal of a target uplink signal; the terminal device determining the transmission power of the target uplink signal according to the transmission power of the reference uplink signal; and the terminal device transmitting the target uplink signal by using the determined transmission power.