Uplink Power Control via SRS Resource Indication
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Solution Overview
Problem
Current uplink power control methods in communication systems face challenges in accuracy, particularly for power saving and inter-cell interference suppression, as they struggle to determine optimal transmission powers for uplink signals using different beams and SRS resources.
Innovation Solution
A method where a terminal device determines sounding reference signal (SRS) resource indication information to calculate a power control parameter, which is used to set the transmission power for uplink signals, improving accuracy by referencing the power control parameter corresponding to the SRS resource indication information sent by the network device.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If traditional uplink power control methods are used, then the system can operate with simpler power control mechanisms, but the accuracy of uplink power control deteriorates
Solution Approach 1:
The patent segments the power control mechanism by introducing separate power control parameters for different SRS resources. Each SRS resource can have its own dedicated power control parameter, allowing independent optimization of power control accuracy for different uplink signals and beams without requiring complete redesign of the power control system.
Solution Approach 2:
The patent changes the power control parameters by introducing SRS resource indication information that references specific power control parameters. This allows the system to select from multiple power control parameters (P0, alpha, f(i)) based on the SRS resource being used, thereby improving power control accuracy through parameter differentiation rather than through structural complexity.
2Reliability
If power control accuracy is improved through multiple parameters, then transmission performance improves, but the complexity of determining transmission power increases
Solution Approach 1:
The patent applies preliminary action by having the network device pre-configure multiple power control parameters (P0, alpha, f(i)) associated with different SRS resources before actual transmission occurs. The terminal device stores these parameters and simply retrieves the appropriate ones based on SRS resource indication information, avoiding complex real-time calculations and reducing the complexity of transmission power determination.
Solution Approach 2:
The patent introduces SRS resource indication information as an intermediary that bridges the relationship between SRS resources and power control parameters. Instead of directly managing complex power control configurations, the system uses this indication information to selectively reference appropriate power control parameters, simplifying the determination process while maintaining high transmission performance.
3Measurement precision
If separate power control parameters are used for different SRS resources, then power allocation accuracy improves, but the signaling overhead increases
Solution Approach 1:
The patent applies universality by making the SRS resource indication information serve multiple functions: it identifies the SRS resource being used, selects the appropriate power control parameters, and enables accurate power allocation all through a single mechanism. This multi-functionality reduces signaling overhead compared to separately configuring and signaling each power control parameter.
Data Source
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AI summary
Disclosed by embodiments of the present application are a method, terminal device, and network device for transmitting signals, the method comprising: a terminal device determining sounding reference signal (SRS) resource indication information corresponding to a target uplink signal; the terminal device determining a first power control parameter of the target uplink signal according to the SRS resource indication information; the terminal device determining a transmitting power of the target uplink signal according to the first power control parameter; the terminal device sending the target uplink signal to a network device according to the transmitting power. The method, terminal device and network device of the embodiments of the present application are helpful in improving the accuracy of power control, which may improve the performance of system transmission.