SRS Power Control Parameter Configuration in TDD Systems
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
In LTE TDD mode, using a single set of power control parameters for SRS signals is inadequate for dynamic subframe technology, leading to inefficient channel measurement, increased SRS overhead, and potential uplink transmission delays, especially when subframes change transmission directions.
Innovation Solution
Configuring multiple sets of power control parameters for SRS signals, allowing flexible transmission in any uplink subframe, including fixed and dynamic subframes, and UpPTS, to ensure accurate channel measurement and power control across different subframe groups without requiring frequent signaling.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single set of power control parameters is used for SRS signals, then the system complexity is reduced, but the channel measurement accuracy and uplink transmission efficiency deteriorate when subframes change transmission directions
Solution Approach 1:
The patent divides the power control parameters into multiple sets, with each set corresponding to different subframe groups (first group and second group). The terminal device selects different parameter sets based on which subframe group the current uplink subframe belongs to, enabling accurate channel measurement for each group while maintaining manageable system complexity through structured segmentation.
Solution Approach 2:
The patent introduces dynamic selection of power control parameter sets based on the subframe group identification. The terminal device dynamically switches between different parameter sets according to the current uplink subframe's group assignment, allowing the system to adapt to changing transmission directions and maintain measurement accuracy without requiring complete reconfiguration.
2Loss of information
If a single set of power control parameters is used for SRS signals, then the signaling overhead is reduced, but the uplink transmission timeliness and resource utilization worsen when dynamic subframes are involved
Solution Approach 1:
The patent segments uplink subframes into different groups (first subframe group and second subframe group) and assigns different power control parameter sets to each group. This segmentation enables efficient resource allocation and timely uplink transmissions in dynamic subframes without requiring excessive signaling, as the group-based structure allows for compact parameter configuration.
Solution Approach 2:
The patent changes the power control parameters based on the subframe group identification. By switching between different parameter sets (P0, alpha, delta values) according to which group the current uplink subframe belongs to, the system optimizes uplink transmission efficiency for different subframe types while keeping the signaling overhead manageable through parameter-based control rather than full reconfiguration.
3Ease of operation
If a single set of power control parameters is used for SRS signals, then the configuration simplicity is maintained, but the adaptability to different subframe groups and transmission directions deteriorates
Solution Approach 1:
The patent divides uplink subframes into distinct groups (first and second subframe groups) with different power control parameter sets. This segmentation provides a clear, organized structure that maintains configuration simplicity while enabling the system to adapt to different subframe groups and transmission directions through group-based parameter selection.
Solution Approach 2:
The patent creates a universal framework where multiple power control parameter sets are defined, and the terminal device universally applies the appropriate set based on subframe group identification. This multi-functional approach allows the same basic mechanism to handle different subframe groups, transmission directions, and dynamic subframes uniformly, maintaining ease of operation while achieving broad adaptability.
Data Source
Figure 1
Figure 2
Figure 3~6
AI summary
A method for configuring power control parameters of sounding reference signals in a time division duplexing system is applied to a terminal and a system and includes: a terminal determining power control parameters of sounding reference signal SRS resources, and determining transmission power of the sounding reference signals based on the power control parameters; the terminal transmitting the sounding reference signals SRS based on the determined transmission power of the sounding reference signals SRS; a base station determining the power control parameters used by the terminal in the SRS resources; the base station receiving SRS signals based on the power control parameters. The embodiment of the present invention also discloses a system for configuring power control parameters of sounding reference signals in a time division duplexing system, which corresponds to the abovementioned method. In the embodiment of the present invention, the flexibility is good, and the uplink resource utilization rate of the TDD mode can be increased.